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Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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1

Multilevel Inverters for Electric Vehicle Applications  

DOE Green Energy (OSTI)

This paper presents multilevel inverters as an application for all-electric vehicle (EV) and hybrid-electric vehicle (HEV) motor drives. Diode-clamped inverters and cascaded H-bridge inverters, (1) can generate near-sinusoidal voltages with only fundamental frequency switching; (2) have almost no electromagnetic interference (EMI) and common-mode voltage; and (3) make an EV more accessible/safer and open wiring possible for most of an EV'S power system. This paper explores the benefits and discusses control schemes of the cascade inverter for use as an EV motor drive or a parallel HEV drive and the diode-clamped inverter as a series HEV motor drive. Analytical, simulated, and experimental results show the superiority of these multilevel inverters for this new niche.

Habetler, T.G.; Peng, F.Z.; Tolbert, L.M.

1998-10-22T23:59:59.000Z

2

Multilevel Inverters for Electric Vehicle Applications  

SciTech Connect

This paper presents multilevel inverters as an application for all-electric vehicle (EV) and hybrid-electric vehicle (HEV) motor drives. Diode-clamped inverters and cascaded H-bridge inverters, (1) can generate near-sinusoidal voltages with only fundamental frequency switching; (2) have almost no electromagnetic interference (EMI) and common-mode voltage; and (3) make an EV more accessible/safer and open wiring possible for most of an EV'S power system. This paper explores the benefits and discusses control schemes of the cascade inverter for use as an EV motor drive or a parallel HEV drive and the diode-clamped inverter as a series HEV motor drive. Analytical, simulated, and experimental results show the superiority of these multilevel inverters for this new niche.

Habetler, T.G.; Peng, F.Z.; Tolbert, L.M.

1998-10-22T23:59:59.000Z

3

Power inverters  

DOE Patents (OSTI)

Power inverters include a frame and a power module. The frame has a sidewall including an opening and defining a fluid passageway. The power module is coupled to the frame over the opening and includes a substrate, die, and an encasement. The substrate includes a first side, a second side, a center, an outer periphery, and an outer edge, and the first side of the substrate comprises a first outer layer including a metal material. The die are positioned in the substrate center and are coupled to the substrate first side. The encasement is molded over the outer periphery on the substrate first side, the substrate second side, and the substrate outer edge and around the die. The encasement, coupled to the substrate, forms a seal with the metal material. The second side of the substrate is positioned to directly contact a fluid flowing through the fluid passageway.

Miller, David H. (Redondo Beach, CA); Korich, Mark D. (Chino Hills, CA); Smith, Gregory S. (Woodland Hills, CA)

2011-11-15T23:59:59.000Z

4

Inverter Controlled Screw Air Compressor Manufacturers ...  

U.S. Energy Information Administration (EIA)

Inverter Controlled Screw Air Compressor, Inverter Controlled Screw Air Compressor Manufacturers & Suppliers Directory - Find here Inverter ...

5

Superconducting wire  

DOE Patents (OSTI)

This invention consists of a method of producing superconducting wire by drawing a glass fiber with a melted powder of a superconducting wire inside the glass tube. After drawing, the glass fiber is heated to crystallize the superconducting compound. The diameter of the superconducting wires is controlled by the rate at which the glass fiber s are drawn from the glass tube.

Day, D.E.; Petrovic, J.J.; Gac, F.D.; Ray, C.S.

1991-03-05T23:59:59.000Z

6

Wire chamber  

DOE Patents (OSTI)

A wire chamber or proportional counter device, such as Geiger-Mueller tube or drift chamber, improved with a gas mixture providing a stable drift velocity while eliminating wire aging caused by prior art gas mixtures. The new gas mixture is comprised of equal parts argon and ethane gas and having approximately 0.25% isopropyl alcohol vapor.

Atac, Muzaffer (Wheaton, IL)

1989-01-01T23:59:59.000Z

7

Resonant snubber inverter  

DOE Patents (OSTI)

A resonant, snubber-based, soft switching, inverter circuit achieves lossless switching during dc-to-ac power conversion and power conditioning with minimum component count and size. Current is supplied to the resonant snubber branches solely by the main inverter switches. Component count and size are reduced by use of a single semiconductor switch in the resonant snubber branches. Component count is also reduced by maximizing the use of stray capacitances of the main switches as parallel resonant capacitors. Resonance charging and discharging of the parallel capacitances allows lossless, zero voltage switching. In one embodiment, circuit component size and count are minimized while achieving lossless, zero voltage switching within a three-phase inverter. 14 figs.

Lai, J.S.; Young, R.W. Sr.; Chen, D.; Scudiere, M.B.; Ott, G.W. Jr.; White, C.P.; McKeever, J.W.

1997-06-24T23:59:59.000Z

8

Resonant snubber inverter  

DOE Patents (OSTI)

A resonant, snubber-based, soft switching, inverter circuit achieves lossless switching during dc-to-ac power conversion and power conditioning with minimum component count and size. Current is supplied to the resonant snubber branches solely by the main inverter switches. Component count and size are reduced by use of a single semiconductor switch in the resonant snubber branches. Component count is also reduced by maximizing the use of stray capacitances of the main switches as parallel resonant capacitors. Resonance charging and discharging of the parallel capacitances allows lossless, zero voltage switching. In one embodiment, circuit component size and count are minimized while achieving lossless, zero voltage switching within a three-phase inverter.

Lai, Jih-Sheng (Knoxville, TN); Young, Sr., Robert W. (Oak Ridge, TN); Chen, Daoshen (Knoxville, TN); Scudiere, Matthew B. (Oak Ridge, TN); Ott, Jr., George W. (Knoxville, TN); White, Clifford P. (Knoxville, TN); McKeever, John W. (Oak Ridge, TN)

1997-01-01T23:59:59.000Z

9

Vision Research Foundations  

NLE Websites -- All DOE Office Websites (Extended Search)

Vision Research Foundations National Alliance for Eye and Vision Research www.eyeresearch.org Foundation Fighting Blindness www.blindness.org Research to Prevent Blindess...

10

Invertible motion blur in video  

Science Conference Proceedings (OSTI)

We show that motion blur in successive video frames is invertible even if the point-spread function (PSF) due to motion smear in a single photo is non-invertible. Blurred photos exhibit nulls (zeros) in the frequency transform of the PSF, leading to ... Keywords: PSF, PSF estimation, computational photography, invertibility, motion deblurring

Amit Agrawal; Yi Xu; Ramesh Raskar

2009-07-01T23:59:59.000Z

11

Precision wire feeder for small diameter wire  

SciTech Connect

A device for feeding small diameter wire having a diameter less than 0.04 mm (16 mil) to a welding station includes a driving wheel for controllably applying a non-deforming driving force to the wire to move the free end of the wire towards the welding station; and a tension device such as a torque motor for constantly applying a reverse force to the wire in opposition to the driving force to keep the wire taut.

Brandon, Eldon D. (Albuquerque, NM); Hooper, Frederick M. (Albuquerque, NM); Reichenbach, Marvin L. (Albuquerque, NM)

1992-01-01T23:59:59.000Z

12

Precision wire feeder for small diameter wire  

DOE Patents (OSTI)

A device for feeding small diameter wire having a diameter less than 0.04 mm (16 mil) to a welding station includes a driving wheel for controllably applying a non-deforming driving force to the wire to move the free end of the wire towards the welding station; and a tension device such as a torque motor for constantly applying a reverse force to the wire in opposition to the driving force to keep the wire taut. 1 figure.

Brandon, E.D.; Hooper, F.M.; Reichenbach, M.L.

1992-08-11T23:59:59.000Z

13

GENERATOR PAD FOUNDATIONS  

SciTech Connect

The purpose of this analysis is to design structural foundations for the Generator Pad. The equipment foundation shall be designed in Section 10 using standard foundation design hand calculations. The vertical loads reflect Mechanical/Electrical requirements. Lateral loads will be calculated using applicable codes. The soil bearing and foundation stresses will be analyzed using accepted engineering mechanics. The foundation will be designed using the Strength Design Method.

T. Saltikov

1995-04-27T23:59:59.000Z

14

Superconducting wires  

SciTech Connect

The requirement of high critical current density has prompted extensive research on ceramic processing of high-T/sub c/ superconductors. An overview of wire fabrication techniques and the limitations they impose on component design will be presented. The effects of processing on microstructure and critical current density will also be discussed. Particle alignment has been observed in extruded samples which is attributed to high shear stresses during plastic forming. Composites of superconductor and silver in several configurations have been made with little deleterious effect on the superconducting properties. 35 refs., 2 figs., 1 tab.

Lanagan, M.T.; Poeppel, R.B.; Singh, J.P.; Dos Santos, D.I.; Lumpp, J.K.; Dusek, J.T.; Goretta, K.C.

1988-06-01T23:59:59.000Z

15

Definition: Inverter | Open Energy Information  

Open Energy Info (EERE)

Inverter Inverter Jump to: navigation, search Dictionary.png Inverter A device that converts direct current electricity to alternating current either for stand-alone systems or to supply power to an electricity grid.[1] View on Wikipedia Wikipedia Definition A power inverter, or inverter, is an electrical power converter that changes direct current (DC) to alternating current (AC). The input voltage, output voltage, and frequency are dependent on design. Static inverters do not use moving parts in the conversion process. Some applications for inverters include converting high-voltage direct current electric utility line power to AC, and deriving AC from DC power sources such as batteries. Related Terms Direct current, Alternating current, Electric grid, Distributed generation, alternating current, electricity generation, power, fuel

16

Gemini Synchronous Inverter  

SciTech Connect

The Gemini Synchronous inverter is a solid state device that, when interposed between a variable-voltage DC power source and an AC power grid, converts the DC to AC at standard line voltages and frequencies. If more power is available from the DC source than is required by the load, the excess flows into the power grid. If less power is available than is required by the load the difference is provided by the power grid in the normal fashion.

Meyer, H.

1976-03-01T23:59:59.000Z

17

DIESEL FUEL TANK FOUNDATIONS  

DOE Green Energy (OSTI)

The purpose of this analysis is to design structural foundations for the Diesel Fuel Tank and Fuel Pumps.

M. Gomez

1995-01-18T23:59:59.000Z

18

Precision wire feeder for small diameter wire  

DOE Patents (OSTI)

This invention is comprised of a device for feeding small diameter wire having a diameter less than .04 mm (16 mil) to a welding station which includes a driving wheel for controllably applying a non-deforming driving force to the wire to move the free end of the wire towards the welding station; and a tension device such as a torque motor for constantly applying a reverse force to the wire in opposition to the driving force to keep the wire taut. 1 fig.

Brandon, E.D.; Hooper, F.M.; Reichenbach, M.L.

1990-12-31T23:59:59.000Z

19

Inverters Unlimited Inc | Open Energy Information  

Open Energy Info (EERE)

Unlimited Inc Jump to: navigation, search Name Inverters Unlimited Inc Place New York Zip 12205 Sector Solar Product US-based manufacturer of solar inverters. References...

20

SITE LIGHTING FOUNDATIONS  

SciTech Connect

The purpose of this analysis is to design structural foundations for the Site Lighting. This analysis is in support of design drawing BABBDF000-01717-2100-23016.

M. Gomez

1995-01-17T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

TMS Foundation: Donors  

Science Conference Proceedings (OSTI)

Corporate Contributors Hydro Aluminium Rolled Products Wagstaff Inc, Foundation Founders ($1000-$2,499) Carl M. Cady Phillip J. Mackey David Alan Shifler

22

TMS Foundation: Programs  

Science Conference Proceedings (OSTI)

That's why the TMS Foundation funds student travel grants to offset the costs of attending the TMS Annual Meeting & Exhibition and ... SPECIAL PROJECTS.

23

Precision Wire Forming  

SciTech Connect

An air-operated semiautomatic wire former was designed and built at Mound Laboratory to form specific types of electrodes to be molded in plastic parts. Use of the semiautomatic wire former eliminates the sliding action of tooling on the surface of the electrode wire to be formed and properly aligns the crimped electrode surfaces to within required tolerance ranges. These are difficulties which are characteristic of conventional wire forming tooling. Interchangeable tooling is provided with the semiautomatic wire former for forming electrode wires in one plane; secondary tooling was designed and bulit for forming electrode wires in two planes; and a special series of tooling was designed for forming more complex wire forms.

Weeks, J. E.; Osborne, J. M.

1970-08-07T23:59:59.000Z

24

Transmission Structure Foundation Design Guide  

Science Conference Proceedings (OSTI)

This guide contains the most current and comprehensive information for the design of foundations for overhead line structures. The guide covers the complete transmission structure foundation design process from the subsurface investigations and design of the foundations, to the construction and inspection of the foundation. Reference documents to assist transmission structure foundation designers in the development of specifications such as for subsurface investigations and foundation construction ...

2012-11-28T23:59:59.000Z

25

Foundations for smarter cities  

Science Conference Proceedings (OSTI)

This paper describes the information technology (IT) foundation and principles for Smarter Cities™. Smarter Cities are urban areas that exploit operational data, such as that arising from traffic congestion, power consumption statistics, and public ...

C. Harrison; B. Eckman; R. Hamilton; P. Hartswick; J. Kalagnanam; J. Paraszczak; P. Williams

2010-07-01T23:59:59.000Z

26

A publication presented by the Electrical Safety Foundation International  

NLE Websites -- All DOE Office Websites (Extended Search)

presented by the Electrical Safety Foundation International presented by the Electrical Safety Foundation International A guide to understanding and maintaining your home's electrical system Should You Do-It-Yourself? Is a Permit or Inspection Required? How Much Energy Does My Home Use? How Does My Electrical System Work? What's Inside My Service Panel? What Kind of Wiring System is in My Home? Does My Home Have Grounded Outlets? What is a Tamper-Resistant Outlet? What is a GFCI? What is Energy Efficient Lighting? How Do I Clean Up a Broken CFL? Page 1 Page 2 Page 3 Page 4 Page 5-6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Everything you need to know What's Inside? Electrical Safety Foundation International The Electrical Safety Foundation International (ESFI)

27

Inverted Attic Bulkhead for HVAC Ductwork | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Inverted Attic Bulkhead for HVAC Ductwork Inverted Attic Bulkhead for HVAC Ductwork Inverted Attic Bulkhead for HVAC Ductwork, Roseville, California (Fact Sheet), Building America...

28

Critical Foundations: Protecting America's Infrastructures  

Science Conference Proceedings (OSTI)

Page 1. CRITICAL FOUNDATIONS PROTECTING AMERICA'S INFRASTRUCTURES The Report of the President's Commission ...

29

Advanced Modular Inverter Technology Development  

DOE Green Energy (OSTI)

Electric and hybrid-electric vehicle systems require an inverter to convert the direct current (DC) output of the energy generation/storage system (engine, fuel cells, or batteries) to the alternating current (AC) that vehicle propulsion motors use. Vehicle support systems, such as lights and air conditioning, also use the inverter AC output. Distributed energy systems require an inverter to provide the high quality AC output that energy system customers demand. Today's inverters are expensive due to the cost of the power electronics components, and system designers must also tailor the inverter for individual applications. Thus, the benefits of mass production are not available, resulting in high initial procurement costs as well as high inverter maintenance and repair costs. Electricore, Inc. (www.electricore.org) a public good 501 (c) (3) not-for-profit advanced technology development consortium assembled a highly qualified team consisting of AeroVironment Inc. (www.aerovironment.com) and Delphi Automotive Systems LLC (Delphi), (www.delphi.com), as equal tiered technical leads, to develop an advanced, modular construction, inverter packaging technology that will offer a 30% cost reduction over conventional designs adding to the development of energy conversion technologies for crosscutting applications in the building, industry, transportation, and utility sectors. The proposed inverter allows for a reduction of weight and size of power electronics in the above-mentioned sectors and is scalable over the range of 15 to 500kW. The main objective of this program was to optimize existing AeroVironment inverter technology to improve power density, reliability and producibility as well as develop new topology to reduce line filter size. The newly developed inverter design will be used in automotive and distribution generation applications. In the first part of this program the high-density power stages were redesigned, optimized and fabricated. One of the main tasks was to design and validate new gate drive circuits to provide the capability of high temp operation. The new power stages and controls were later validated through extensive performance, durability and environmental tests. To further validate the design, two power stages and controls were integrated into a grid-tied load bank test fixture, a real application for field-testing. This fixture was designed to test motor drives with PWM output up to 50kW. In the second part of this program the new control topology based on sub-phases control and interphase transformer technology was successfully developed and validated. The main advantage of this technology is to reduce magnetic mass, loss and current ripple. This report summarizes the results of the advanced modular inverter technology development and details: (1) Power stage development and fabrication (2) Power stage validation testing (3) Grid-tied test fixture fabrication and initial testing (4) Interphase transformer technology development

Adam Szczepanek

2006-02-04T23:59:59.000Z

30

Advanced Modular Inverter Technology Development  

SciTech Connect

Electric and hybrid-electric vehicle systems require an inverter to convert the direct current (DC) output of the energy generation/storage system (engine, fuel cells, or batteries) to the alternating current (AC) that vehicle propulsion motors use. Vehicle support systems, such as lights and air conditioning, also use the inverter AC output. Distributed energy systems require an inverter to provide the high quality AC output that energy system customers demand. Today's inverters are expensive due to the cost of the power electronics components, and system designers must also tailor the inverter for individual applications. Thus, the benefits of mass production are not available, resulting in high initial procurement costs as well as high inverter maintenance and repair costs. Electricore, Inc. (www.electricore.org) a public good 501 (c) (3) not-for-profit advanced technology development consortium assembled a highly qualified team consisting of AeroVironment Inc. (www.aerovironment.com) and Delphi Automotive Systems LLC (Delphi), (www.delphi.com), as equal tiered technical leads, to develop an advanced, modular construction, inverter packaging technology that will offer a 30% cost reduction over conventional designs adding to the development of energy conversion technologies for crosscutting applications in the building, industry, transportation, and utility sectors. The proposed inverter allows for a reduction of weight and size of power electronics in the above-mentioned sectors and is scalable over the range of 15 to 500kW. The main objective of this program was to optimize existing AeroVironment inverter technology to improve power density, reliability and producibility as well as develop new topology to reduce line filter size. The newly developed inverter design will be used in automotive and distribution generation applications. In the first part of this program the high-density power stages were redesigned, optimized and fabricated. One of the main tasks was to design and validate new gate drive circuits to provide the capability of high temp operation. The new power stages and controls were later validated through extensive performance, durability and environmental tests. To further validate the design, two power stages and controls were integrated into a grid-tied load bank test fixture, a real application for field-testing. This fixture was designed to test motor drives with PWM output up to 50kW. In the second part of this program the new control topology based on sub-phases control and interphase transformer technology was successfully developed and validated. The main advantage of this technology is to reduce magnetic mass, loss and current ripple. This report summarizes the results of the advanced modular inverter technology development and details: (1) Power stage development and fabrication (2) Power stage validation testing (3) Grid-tied test fixture fabrication and initial testing (4) Interphase transformer technology development

Adam Szczepanek

2006-02-04T23:59:59.000Z

31

Wire-inhomogeneity detector  

DOE Patents (OSTI)

A device for uncovering imperfections in electrical conducting wire, particularly superconducting wire, by detecting variations in eddy currents. Eddy currents effect the magnetic field in a gap of an inductor, contained in a modified commercial ferrite core, through which the wire being tested is passed. A small increase or decrease in the amount of conductive material, such as copper, in a fixed cross section of wire will unbalance a bridge used to measure the impedance of the inductor, tripping a detector and sounding an alarm.

Gibson, G.H.; Smits, R.G.; Eberhard, P.H.

1982-08-31T23:59:59.000Z

32

Update on SIC-Based Inverter Technology  

SciTech Connect

This paper presents a study of silicon carbide (SiC) technology which includes device characterization and modeling, inverter simulation, and test results for several prototype inverters. The static and dynamic characteristics of discrete devices and half bridge modules are presented. Test results of a 55 kW hybrid inverter with SiC Schottky diodes and an 18 kW all-SiC inverter using SiC JFETs and Schottky diodes are demonstrated.

Chinthavali, Madhu Sudhan [ORNL; Zhang, Hui [ORNL; Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL

2009-01-01T23:59:59.000Z

33

THE AOCS FOUNDATION  

Science Conference Proceedings (OSTI)

THE AOCS FOUNDATION Mail: P.O. Box 17190, Urbana, IL 61803-7190 USA Street: 2710 S. Boulder Drive, Urbana, IL 61802-6996 USA Phone: +1-217-359-2344; Fax: +1-217-351-8091 www.aocsfoundation.org

34

Thermal Study of Inverter Components: Preprint  

DOE Green Energy (OSTI)

Thermal histories of inverter components were collected from operating inverters from several manufacturers and three locations. The data were analyzed to determine thermal profiles, the dependence on local conditions, and to assess the effect on inverter reliability. Inverter temperatures were shown to increase with the power dissipation of the inverters, follow diurnal and annual cycles, and have a dependence on wind speed. An accumulated damage model was applied to the temperature profiles and an example of using these data to predict reliability was explored.

Sorensen, N. R.; Thomas, E. V.; Quintana, M. A.; Barkaszi, S.; Rosenthal, A.; Zhang, Z.; Kurtz, S.

2012-06-01T23:59:59.000Z

35

Effective switching frequency multiplier inverter  

SciTech Connect

A switching frequency multiplier inverter for low inductance machines that uses parallel connection of switches and each switch is independently controlled according to a pulse width modulation scheme. The effective switching frequency is multiplied by the number of switches connected in parallel while each individual switch operates within its limit of switching frequency. This technique can also be used for other power converters such as DC/DC, AC/DC converters.

Su, Gui-Jia (Oak Ridge, TN); Peng, Fang Z. (Okemos, MI)

2007-08-07T23:59:59.000Z

36

Wire-driven Parallel Robot: Permitting Collisions Between Wires  

Science Conference Proceedings (OSTI)

In spatial designs of wire-driven parallel robots, collisions between wires by limiting platform trajectories. The common practice for avoiding collisions between wires is by limiting the moving platform trajectories. However, as opposed to rigid ... Keywords: cable robot, collision, tangling, wire robot, workspace

Yonatan Wischnitzer; Nir Shvalb; Moshe Shoham

2008-09-01T23:59:59.000Z

37

Home Depot Foundation | Open Energy Information  

Open Energy Info (EERE)

Depot Foundation Jump to: navigation, search Name Home Depot Foundation Place Atlanta, GA Website http:www.homedepotfoundation References Home Depot Foundation1 Information...

38

System and method for regulating resonant inverters  

SciTech Connect

A technique is provided for direct digital phase control of resonant inverters based on sensing of one or more parameters of the resonant inverter. The resonant inverter control system includes a switching circuit for applying power signals to the resonant inverter and a sensor for sensing one or more parameters of the resonant inverter. The one or more parameters are representative of a phase angle. The resonant inverter control system also includes a comparator for comparing the one or more parameters to a reference value and a digital controller for determining timing of the one or more parameters and for regulating operation of the switching circuit based upon the timing of the one or more parameters.

Stevanovic, Ljubisa Dragoljub (Clifton Park, NY); Zane, Regan Andrew (Superior, CO)

2007-08-28T23:59:59.000Z

39

Shared inverter residential photovoltaic system concept  

SciTech Connect

A residential photovoltaic system concept involving a number of separate roof-mounted arrays all connected to a single utility-interactive inverter is proposed and analyzed in comparison to systems employing one inverter for each array. The conclusion of significance is that such shared inverter systems offer a costs savings of approximately 10 percent. It is observed that other substantial benefits might derive from a reduction in the number of tie-in points between distributed generators and the electric utility grid.

Kern, E.C.; Solman, F.J.

1981-11-01T23:59:59.000Z

40

Integrated Inverter Control for Multiple Electric Machines ...  

Wind Energy; Partners (27 ... control for directing multiple inverters with a single ... 57, 62), which may include a three-phase main ...

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Cascade Multilevel Inverters for Utility Applications  

SciTech Connect

Cascade multilevel inverters have been developed by the authors for utility applications. A cascade M-level inverter consists of (M-1)/2 H- bridges in which each bridge has its own separate dc source. The new inverter: (1) can generate almost sinusoidal waveform voltage while only switching one time per fundamental cycle, (2) can eliminate transformers of multipulse inverters used in conventional utility interfaces and static var compensators, and (3) makes possible direct parallel or series connection to medium- and high-voltage power systems without any transformers. In other words, the cascade inverter is much more efficient and suitable for utility applications than traditional multipulse and pulse width modulation (PWM) inverters. The authors have experimentally demonstrated the superiority of the new inverter for reactive power (var) and harmonic compensation. This paper will summarize features,feasibility, and control schemes of the cascade inverter for utility applications including utility interface of renewable energy, voltage regulation, var compensation, and harmonic filtering in power systems.Analytical, simulated, and experimental results demonstrate the superiority of the new inverters.

Peng, F.Z., McKeever, J.W., Adams, D.J.

1997-12-31T23:59:59.000Z

42

Enhanced Diffusional Processes in Wire Bonding  

Science Conference Proceedings (OSTI)

Presentation Title, Enhanced Diffusional Processes in Wire Bonding ... there is a tremendous need for implementation of thinner wires in wire boning processes.

43

Wire brush fastening device  

DOE Patents (OSTI)

A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus.

Meigs, Richard A. (East Concord, NY)

1995-01-01T23:59:59.000Z

44

Wire brush fastening device  

DOE Patents (OSTI)

A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus.

Meigs, R.A.

1993-08-31T23:59:59.000Z

45

Wire brush fastening device  

DOE Patents (OSTI)

A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus. 13 figs.

Meigs, R.A.

1995-09-19T23:59:59.000Z

46

G.Comer Foundation  

NLE Websites -- All DOE Office Websites (Extended Search)

Comer Comer Foundation Please note: I work for Pennsylvania State University, And help UN IPCC, NRC, etc., But I am not representing them, Just me. Climate Change: Opportunities in the Greenhouse Richard B. Alley, Evan Pugh Professor of Geosciences and Associate of the Earth and Environmental Systems Institute, 2010 University Turbine Systems Research Workshop, Penn State Energy * You eat about 2400 Calories per day; * You use over 240,000 Calories per day; * Like having 100+ serfs to do your bidding; * Driving, heating, cooling, pumping, plowing, trucking, flying, cooking... * Almost all from oil, coal and natural gas (fossil fuels). http://www.explorepahistory.com/ (Pennsylvania State Education Association) Settlers cut almost all Pennsylvania trees, often

47

An Investigation of Wire Breaks Created during Copper Wire ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2010. Symposium, Failure Analysis and Prevention. Presentation Title, An Investigation of Wire ...

48

Invert Effective Thermal Conductivity Calculation  

SciTech Connect

The objective of this calculation is to evaluate the temperature-dependent effective thermal conductivities of a repository-emplaced invert steel set and surrounding ballast material. The scope of this calculation analyzes a ballast-material thermal conductivity range of 0.10 to 0.70 W/m {center_dot} K, a transverse beam spacing range of 0.75 to 1.50 meters, and beam compositions of A 516 carbon steel and plain carbon steel. Results from this calculation are intended to support calculations that identify waste package and repository thermal characteristics for Site Recommendation (SR). This calculation was developed by Waste Package Department (WPD) under Office of Civilian Radioactive Waste Management (OCRWM) procedure AP-3.12Q, Revision 1, ICN 0, Calculations.

M.J. Anderson; H.M. Wade; T.L. Mitchell

2000-03-17T23:59:59.000Z

49

Improved wire chamber  

DOE Patents (OSTI)

An improved gas mixture for use with proportional counter devices, such as Geiger-Mueller tubes and drift chambers. The improved gas mixture provides a stable drift velocity while eliminating wire aging caused by prior art gas mixtures. The new gas mixture is comprised of equal parts argon and ethane gas and having approximately 0.25% isopropyl alcohol vapor. 2 figs.

Atac, M.

1987-05-12T23:59:59.000Z

50

LANL Foundation conference draws teachers  

NLE Websites -- All DOE Office Websites (Extended Search)

LANL Foundation Conference Draws Teachers LANL Foundation Conference Draws Teachers Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit LANL Foundation conference draws teachers The conference was made possible by a financial investment from LANS, LLC in the Foundation's Inquiry Science Education Consortium and from the Department of Energy. November 1, 2012 dummy image Read our archives Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email Close to 1,500 people, including teachers, principals, and others, attended the recent Los Alamos National Laboratory Foundation's 15th annual education conference. The speakers included Harry K. and Rosemary Wong on the subject of ""Effective Teaching."

51

Wire Bonder: Kulicke and Soffa Model 4526  

Science Conference Proceedings (OSTI)

Wire Bonder: Kulicke and Soffa Model 4526. Description: CORAL Name: Wire Bonder. Needs Description. Scientific Opportunities / Applications: ...

2013-05-23T23:59:59.000Z

52

Deformation mechanisms beneath shallow foundations  

E-Print Network (OSTI)

. Where sufficient capacity is available near the ground surface, projects such as low-rise buildings (up to about five storeys in height), houses, tanks and even wind turbines might adopt a shallow foundation system. 1.2 Shallow Foundations Shallow... and drying procedure is followed. Figures 1.1(b) and 1.1(c) show a wind turbine shallow foundation during the concrete pour stage, and a completed rectangular footing with column reinforcement respectively. Two issues are considered in the design of shallow...

McMahon, Brendan

2013-02-05T23:59:59.000Z

53

Superconducting magnet wire  

DOE Patents (OSTI)

A superconducting tape or wire with an improved critical field is formed of alternating layers of a niobium-containing superconductor such as Nb, NbTi, Nb.sub.3 Sn or Nb.sub.3 Ge with a thickness in the range of about 0.5-1.5 times its coherence length, supported and separated by layers of copper with each copper layer having a thickness in the range of about 170-600 .ANG..

Schuller, Ivan K. (Woodridge, IL); Ketterson, John B. (Evanston, IL); Banerjee, Indrajit (San Jose, CA)

1986-01-01T23:59:59.000Z

54

Multigrid Solution of the Semigeostrophic Invertibility Relation  

Science Conference Proceedings (OSTI)

In semigeostrophic theory one can recover the balanced wind and mass fields from the potential vorticity by solving a nonlinear elliptic boundary-value problem. This paper describes the efficient solution of this invertibility relation in two ...

Scott R. Fulton

1989-09-01T23:59:59.000Z

55

Integrated Inverter For Driving Multiple Electric Machines  

DOE Patents (OSTI)

An electric machine drive (50) has a plurality of inverters (50a, 50b) for controlling respective electric machines (57, 62), which may include a three-phase main traction machine (57) and two-phase accessory machines (62) in a hybrid or electric vehicle. The drive (50) has a common control section (53, 54) for controlling the plurality of inverters (50a, 50b) with only one microelectronic processor (54) for controlling the plurality of inverters (50a, 50b), only one gate driver circuit (53) for controlling conduction of semiconductor switches (S1-S10) in the plurality of inverters (50a, 50b), and also includes a common dc bus (70), a common dc bus filtering capacitor (C1) and a common dc bus voltage sensor (67). The electric machines (57, 62) may be synchronous machines, induction machines, or PM machines and may be operated in a motoring mode or a generating mode.

Su, Gui-Jia [Knoxville, TN; Hsu, John S [Oak Ridge, TN

2006-04-04T23:59:59.000Z

56

Removing Barriers to Utility Interconnected Photovoltaic Inverters  

SciTech Connect

The Million Solar Roofs Initiative has motivated a renewed interest in the development of utility interconnected photovoltaic (UIPV) inverters. Government-sponsored programs (PVMaT, PVBONUS) and competition among utility interconnected inverter manufacturers have stimulated innovations and improved the performance of existing technologies. With this resurgence, Sandia National Laboratories (SNL) has developed a program to assist industry initiatives to overcome barriers to UIPV inverters. In accordance with newly adopted IEEE 929-2000, the utility interconnected PV inverters are required to cease energizing the utility grid when either a significant disturbance occurs or the utility experiences an interruption in service. Compliance with IEEE 929-2000 is being widely adopted by utilities as a minimum requirement for utility interconnection. This report summarizes work done at the SNL balance-of-systems laboratory to support the development of IEEE 929-2000 and to assist manufacturers in meeting its requirements.

Gonzalez, S.; Bonn, R.H.; Ginn, J.W.

2000-10-03T23:59:59.000Z

57

Excavationless Exterior Foundation Insulation Exploratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Excavationless Exterior Foundation Excavationless Exterior Foundation Insulation Exploratory Study NorthernSTAR Building America Team Garrett Mosiman Technical Approach The project begins with the concept of an "excavationless" exterior foundation insulation upgrade that is cost-competitive with current methods, and involves little impact to existing landscape and site features. Process: 1. Literature review to establish the building science case for the advantages of exterior foundation insulation vs. interior insulation 2. Presentation and analysis of two exterior, full-excavation exterior insulation upgrades to establish a base case for costs 3. Survey of five typical twin-cities neighborhoods to categorize and quantify typical obstructions 4. Web-based search to identify available materials and technologies that have

58

Dual wire welding torch and method  

SciTech Connect

A welding torch includes a nozzle with a first welding wire guide configured to orient a first welding wire in a first welding wire orientation, and a second welding wire guide configured to orient a second welding wire in a second welding wire orientation that is non-coplanar and divergent with respect to the first welding wire orientation. A method of welding includes moving a welding torch with respect to a workpiece joint to be welded. During moving the welding torch, a first welding wire is fed through a first welding wire guide defining a first welding wire orientation and a second welding wire is fed through a second welding wire guide defining a second welding wire orientation that is divergent and non-coplanar with respect to the first welding wire orientation.

Diez, Fernando Martinez (Peoria, IL); Stump, Kevin S. (Sherman, IL); Ludewig, Howard W. (Groveland, IL); Kilty, Alan L. (Peoria, IL); Robinson, Matthew M. (Peoria, IL); Egland, Keith M. (Peoria, IL)

2009-04-28T23:59:59.000Z

59

Wire detecting apparatus and method  

DOE Patents (OSTI)

This invention is comprised of an apparatus and method that combines a signal generator and a passive signal receiver to detect and record the path of partially or completely concealed electrical wiring without disturbing the concealing surface. The signal generator applies a series of electrical pulses to the selected wiring of interest. The applied pulses create a magnetic field about the wiring that can be detected by a coil contained within the signal receiver. An audible output connected to the receiver and driven by the coil reflects the receiver`s position with respect to the wiring. The receiver`s audible signal is strongest when the receiver is directly above the wiring and the long axis of the receiver`s coil is parallel to the wiring. A marking means is mounted on the receiver to mark the location of the wiring as the receiver is directed over the wiring`s concealing surface. Numerous marks made on various locations of the concealing surface will trace the path of the wiring of interest.

Kronberg, J.W.

1991-12-31T23:59:59.000Z

60

Tribal Renewable Energy Foundational Course: Geothermal | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Other Agencies You are here Home Tribal Renewable Energy Foundational Course: Geothermal Tribal Renewable Energy Foundational Course: Geothermal Watch the U.S. Department of...

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Tribal Renewable Energy Foundational Course: Electricity Grid...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electricity Grid Basics Tribal Renewable Energy Foundational Course: Electricity Grid Basics Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar...

62

Tribal Renewable Energy Curriculum Foundational Course: Biomass...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Biomass Tribal Renewable Energy Curriculum Foundational Course: Biomass Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on biomass renewable...

63

Federal Energy Management Program: National Science Foundation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Foundation - Lake Hoare, Antarctica to someone by E-mail Share Federal Energy Management Program: National Science Foundation - Lake Hoare, Antarctica on Facebook Tweet...

64

Tribal Renewable Energy Foundational Course: Solar | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Tribal Renewable Energy Foundational Course: Solar Watch the DOE Office of Indian Energy foundational course webinar on solar renewable energy by clicking on the .swf link...

65

Tribal Renewable Energy Curriculum Foundational Course: Wind...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wind Tribal Renewable Energy Curriculum Foundational Course: Wind Watch the DOE Office of Indian Energy foundational course webinar on wind renewable energy by clicking on the .swf...

66

Tribal Renewable Energy Foundational Course: Strategic Energy...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Renewable Energy Foundational Course: Strategic Energy Planning Tribal Renewable Energy Foundational Course: Strategic Energy Planning Watch the U.S. Department of Energy Office of...

67

Tribal Renewable Energy Foundational Course: Hydroelectric |...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydroelectric Tribal Renewable Energy Foundational Course: Hydroelectric Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on hydroelectric...

68

Glass Drawing for Wire Arrays  

The size of the wafer is limited only by how much fiber is bundled prior to fusion. Since the wire is not actually being drawn, ...

69

high strength steel wire products  

Science Conference Proceedings (OSTI)

This Table of Contents is from Metallurgy, Processing, and Applications of Metal Wires--State of the Art Technology and Challenges for the Future published by ...

70

Qatar Foundation | Open Energy Information  

Open Energy Info (EERE)

Qatar Foundation Qatar Foundation Jump to: navigation, search Name Qatar Foundation Place Doha, Qatar Sector Solar Product Qatar-based foundation that is focused on education, scientific research and community development. The foundation is involved in research on climate change and clean energy and is part owner of project developer Qatar Solar Technologies. Coordinates 25.343065°, 51.493193° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":25.343065,"lon":51.493193,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

71

EMPLACEMENT DRIFT INVERT-LOW STEEL EVALUATION  

SciTech Connect

This technical report evaluates and develops options for reducing the amount of steel in the emplacement drift invert. Concepts developed in the ''Invert Configuration and Drip Shield Interface'' were evaluated to determine material properties required for the proposed invert concepts. Project requirements documents prescribe the use of a carbon steel frame for the invert with a granular material of crushed tuff as ballast. The ''Invert Configuration and Drip Shield Interface'' developed three concepts: (1) All-Ballast Invert; (2) Modified Steel Invert with Ballast; and (3) Steel Tie with Ballast Invert. Analysis of the steel frame members, runway beams, and guide beams, for the modified steel invert with ballast, decreased the quantity of steel in the emplacement drift invert, however a substantial steel support frame for the gantry and waste package/pallet assembly is still required. Use of one of the other two concepts appears to be an alternative to the steel frame and each of the concepts uses considerably less steel materials. Analysis of the steel tie with ballast invert shows that the bearing pressure on the ballast under the single steel tie, C 9 x 20, loaded with the waste package/pallet assembly, drip shield, and backfill exceeds the upper bound of the allowable bearing capacity for tuff used in this study. The single tie, C 10 x 20, will also fail for the same loading condition except for the tie length of 4.2 meters and longer. Analysis also shows that with two ties, C 9 or 10 x 20's, the average ballast pressure is less than the allowable bearing capacity. Distributing the waste package/pallet, drip shield, and backfill loads to two steel ties reduces the contact bearing pressure. Modifying the emplacement pallet end beams to a greater width, reducing the tie spacing, and increasing the width of the ties would ensure that the pallet beams are always supported by two steel ties. Further analysis is required to determine compatible tie size and spacing and pallet beam width. Testing is also required to determine the bearing capacity of the tuff materials. Analysis of the all-ballast invert shows that the waste package/pallet assembly, as currently designed, can be supported by the compacted crushed tuff. The drip shield and related backfill loads cannot be supported by the compacted crushed tuff because of the narrow base angle that currently supports the drip shield. Increasing the width of the base angle of the drip shield will better distribute the drip shield and backfill load to the compacted crushed tuff. Testing is required to determine the bearing capacity of the tuff materials. Emplacement/retrieval equipment will also require analysis and development to be compatible with the all-ballast invert.

M. E. Taylor and D. H. Tang

2000-09-29T23:59:59.000Z

72

Improved superconducting magnet wire  

DOE Patents (OSTI)

This invention is directed to a superconducting tape or wire composed of alternating layers of copper and a niobium-containing superconductor such as niobium of NbTi, Nb/sub 3/Sn or Nb/sub 3/Ge. In general, each layer of the niobium-containing superconductor has a thickness in the range of about 0.05 to 1.5 times its coherence length (which for Nb/sub 3/Si is 41 A) with each copper layer having a thickness in the range of about 170 to 600 A. With the use of very thin layers of the niobium composition having a thickness within the desired range, the critical field (H/sub c/) may be increased by factors of 2 to 4. Also, the thin layers of the superconductor permit the resulting tape or wire to exhibit suitable ductility for winding on a magnet core. These compositions are also characterized by relatively high values of critical temperature and therefore will exhibit a combination of useful properties as superconductors.

Schuller, I.K.; Ketterson, J.B.

1983-08-16T23:59:59.000Z

73

Definition: Controllable and Regulating Inverter | Open Energy Information  

Open Energy Info (EERE)

Controllable and Regulating Inverter Controllable and Regulating Inverter Jump to: navigation, search Dictionary.png Controllable and Regulating Inverter Inverters are used to convert Direct Current (DC), the form of electricity produced by solar panels and batteries, to Alternating Current (AC), the form of electricity that comes from most wall plugs. A controllable/regulating inverter can adjust its output to help control voltage and power factor, enabling it to provide grid support. This is important because today, inverter standards are designed to prevent inverters from trying to regulate power beyond the point where they are connected to the grid.[1] Related Terms Direct Current, Alternating Current, electricity generation, inverter References ↑ https://www.smartgrid.gov/category/technology/controllable_and_regulating_inverter

74

Foundation Capital.txt - Notepad  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Foundation Capital.txt Foundation Capital.txt From: Michael Bauer [MBauer@FoundationCap.com] Sent: Thursday, April 16, 2009 11:20 AM To: GC-62 Subject: Fed Register comments Dear Sir or Lady, Per Wendolyn Holland's request, here are my comments: (i) What improvements to the existing transactions (e.g. CRADAs, WFOs, User Agreements, etc.) would you suggest that DOE consider? Most obvious problem is cost of resources at national labs, which is much higher than at universities and other institutions due to imputed overhead. These costs should be reviewed to find whether they're a) really reflective of real costs at the labs, b)whether they truly reflect unique capabilities that justify the higher cost vs. comparable institutions. It's telling that many of the labs themselves tend to outsource certain research

75

Foundation Insulation for Existing Homes  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

How Do We Retrofit Tough Buildings? Foundation Insulation for Existing Homes Building America Technical Update April 29 & 30, 2013 Patrick H. Huelman Cold Climate Housing Coordinator University of Minnesota Extension Foundation Insulation for Existing Homes * Context - Focused on basements and crawlspaces. - Aimed at cold climates (Climate Zones 6 & 7). - Generally aimed at liquid active walls. * Approach - Managing risks - Current solutions & best practices - Evaluating new approaches * Primary focus is to reduce energy use by 30 to 50% with emphasis on existing homes. * Promote building science solutions using a systems engineering and integrated design approach. * "Do no harm" => must ensure that safety, health, and durability are maintained or improved.

76

Torpedo Speciality Wire Inc | Open Energy Information  

Open Energy Info (EERE)

Torpedo Speciality Wire Inc Jump to: navigation, search Name Torpedo Speciality Wire Inc Place Rocky Mount, North Carolina Zip 27804 Sector Solar Product North Carolina-based maker...

77

Ignition and spread of electrical wire fires  

E-Print Network (OSTI)

pilot source, placed in the center of the wire sample to initiate ignition, which heats the wire through both convection (major) and radiation (

Huang, Xinyan

2012-01-01T23:59:59.000Z

78

Diamond Wire Technology LLC | Open Energy Information  

Open Energy Info (EERE)

Wire Technology LLC Jump to: navigation, search Name Diamond Wire Technology LLC Place Colorado Springs, Colorado Zip 80916 Sector Solar Product US-based manufacturer of diamond...

79

Using Cascade Multilevel Inverters Fang Zheng Peng, Senior Member...  

Office of Scientific and Technical Information (OSTI)

power flows into the inverter for positive Icd and out from the inverter for negative led. The SVG generates leading reactive power when IC, is positive and lagging reactive...

80

Plasma chemistry in wire chambers  

SciTech Connect

The phenomenology of wire chamber aging is discussed and fundamentals of proportional counters are presented. Free-radical polymerization and plasma polymerization are discussed. The chemistry of wire aging is reviewed. Similarities between wire chamber plasma (>1 atm dc-discharge) and low-pressure rf-discharge plasmas, which have been more widely studied, are suggested. Construction and use of a system to allow study of the plasma reactions occurring in wire chambers is reported. A proportional tube irradiated by an {sup 55}Fe source is used as a model wire chamber. Condensable species in the proportional tube effluent are concentrated in a cryotrap and analyzed by gas chromatography/mass spectrometry. Several different wire chamber gases (methane, argon/methane, ethane, argon/ethane, propane, argon/isobutane) are tested and their reaction products qualitatively identified. For all gases tested except those containing methane, use of hygroscopic filters to remove trace water and oxygen contaminants from the gas resulted in an increase in the average molecular weight of the products, consistent with results from low-pressure rf-discharge plasmas. It is suggested that because water and oxygen inhibit polymer growth in the gas phase that they may also reduce polymer deposition in proportional tubes and therefore retard wire aging processes. Mechanistic implications of the plasma reactions of hydrocarbons with oxygen are suggested. Unresolved issues in this work and proposals for further study are discussed.

Wise, J.

1990-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Charge Controller and Inverter: for Solar Panel  

Science Conference Proceedings (OSTI)

The main purpose of this project is to design an inverter that will enable the inversion of a DC power source, supplied by Photovoltaic (PV) Cells, to an AC power source that will be either used to supply a load or connected directly to the utility grid. ...

Hadaate Ullah; Golam Moktader Nayeem; Mohammad Arif Sobhan Bhuiyan

2012-03-01T23:59:59.000Z

82

Pulse width modulation inverter with battery charger  

SciTech Connect

An inverter is connected between a source of DC power and a three-phase AC induction motor, and a microprocessor-based circuit controls the inverter using pulse width modulation techniques. In the disclosed method of pulse width modulation, both edges of each pulse of a carrier pulse train are equally modulated by a time proportional to sin [theta], where [theta] is the angular displacement of the pulse center at the motor stator frequency from a fixed reference point on the carrier waveform. The carrier waveform frequency is a multiple of the motor stator frequency. The modulated pulse train is then applied to each of the motor phase inputs with respective phase shifts of 120[degree] at the stator frequency. Switching control commands for electronic switches in the inverter are stored in a random access memory (RAM) and the locations of the RAM are successively read out in a cyclic manner, each bit of a given RAM location controlling a respective phase input of the motor. The DC power source preferably comprises rechargeable batteries and all but one of the electronic switches in the inverter can be disabled, the remaining electronic switch being part of a flyback'' DC-DC converter circuit for recharging the battery. 11 figs.

Slicker, J.M.

1985-01-01T23:59:59.000Z

83

Pulse width modulation inverter with battery charger  

SciTech Connect

An inverter is connected between a source of DC power and a three-phase AC induction motor, and a microprocessor-based circuit controls the inverter using pulse width modulation techniques. In the disclosed method of pulse width modulation, both edges of each pulse of a carrier pulse train are equally modulated by a time proportional to sin .theta., where .theta. is the angular displacement of the pulse center at the motor stator frequency from a fixed reference point on the carrier waveform. The carrier waveform frequency is a multiple of the motor stator frequency. The modulated pulse train is then applied to each of the motor phase inputs with respective phase shifts of 120.degree. at the stator frequency. Switching control commands for electronic switches in the inverter are stored in a random access memory (RAM) and the locations of the RAM are successively read out in a cyclic manner, each bit of a given RAM location controlling a respective phase input of the motor. The DC power source preferably comprises rechargeable batteries and all but one of the electronic switches in the inverter can be disabled, the remaining electronic switch being part of a "flyback" DC-DC converter circuit for recharging the battery.

Slicker, James M. (Union Lake, MI)

1985-01-01T23:59:59.000Z

84

A delta configured auxiliary resonant snubber inverter  

SciTech Connect

A delta ({Delta}) configured auxiliary resonant snubber inverter is developed to overcome the voltage floating problem in a wye (Y) configured resonant snubber inverter. The proposed inverter is to connect auxiliary resonant branches between phase outputs to avoid a floating point voltage which may cause over-voltage failure of the auxiliary switches. Each auxiliary branch consists of a resonant inductor and a reverse blocking auxiliary switch. Instead of using an anti-paralleled diode to allow resonant current to flow in the reverse direction, as in the Y-configured version, the resonant branch in the {Delta}-configured version must block the negative voltage, typically done by a series diode. This paper shows single-phase and three-phase versions of {Delta}-configured resonant snubber inverters and describes in detail the operating principle of a single-phase version. The extended three-phase version is proposed with non-adjacent state space vector modulation. For hardware implementation, a single-phase 1-kW unit and a three-phase 100-kW unit were built to prove the concept. Experimental results show the superiority of the proposed topology.

Lai, J.S.; Young, R.W.; Ott, G.W. Jr.; McKeever, J.W. [Oak Ridge National Lab., TN (United States). Engineering Technology Div.; Peng, F.Z. [Univ. of Tennessee, Knoxville, TN (United States)]|[Oak Ridge National Lab., TN (United States)

1995-09-01T23:59:59.000Z

85

Understanding Fault Characteristics of Inverter-Based Distributed Energy Resources  

SciTech Connect

This report discusses issues and provides solutions for dealing with fault current contributions from inverter-based distributed energy resources.

Keller, J.; Kroposki, B.

2010-01-01T23:59:59.000Z

86

Building Momentum UC San Diego Foundation  

E-Print Network (OSTI)

investment vehicle for the Foundation's endowed contributions. The Short-Term Invest- ment Pool (STIP), which. The Foundation's investment in the university's STIP and HIP is considered to be an investment in an external

Russell, Lynn

87

Vertical Axis Wind Turbine Foundation parameter study  

DOE Green Energy (OSTI)

The dynamic failure criterion governing the dimensions of prototype Vertical Axis Wind Turbine Foundations is treated as a variable parameter. The resulting change in foundation dimensions and costs is examined.

Lodde, P.F.

1980-07-01T23:59:59.000Z

88

Cognitive Foundations for Visual Analytics  

SciTech Connect

In this report, we provide an overview of scientific/technical literature on information visualization and VA. Topics discussed include an update and overview of the extensive literature search conducted for this study, the nature and purpose of the field, major research thrusts, and scientific foundations. We review methodologies for evaluating and measuring the impact of VA technologies as well as taxonomies that have been proposed for various purposes to support the VA community. A cognitive science perspective underlies each of these discussions.

Greitzer, Frank L.; Noonan, Christine F.; Franklin, Lyndsey

2011-02-25T23:59:59.000Z

89

Sizing of Overhead Ground Wires for Lightning  

Science Conference Proceedings (OSTI)

Overhead ground wires, or shield wires, are placed on transmission lines as air terminals for lightning strikes to shield the phase conductors from direct strikes. Although of short duration, lightning strikes to ground wires may result in significant damage. Utilities are increasingly using optical fiber ground wires (OPGWs), and severe damage to the OPGWs could result in failure of the communication link. There is renewed interest in the dimensioning and testing of ground wires for improved ...

2012-12-12T23:59:59.000Z

90

Inverter control systems in the residential heat pump air conditioner  

SciTech Connect

A compressor capacity control with an inverter has been considered from the viewpoint of high energy saving in a refrigerating cycle. However, the system has not been put into practical use because of high initial cost, technical problems of electronic parts, and complexity of system control. In this connection, we developed the new inverter-controlled heat-pump air conditioner by using the latest electronics and refrigeration technology. This paper discusses the trend of energy saving in air conditioners in Japan and the objectives of developing the inverter controlled air conditioner. It also discusses the following items with respect to the inverter controlled air conditioner and the effects of employing an inverter: 1. Inverter for air conditioning; 2. Refrigeration cycle; 3. Air conditioner control with inverter.

Shimma, Y.; Tateuchi, T.; Suglura, H.

1985-01-01T23:59:59.000Z

91

Decomposition Of Invertible And Conformal Transformations  

E-Print Network (OSTI)

In this article, we give a geometric description for any invertible operator on a finite dimensional inner--product space. With the aid of such a description, we are able to decompose any given conformal transformation as a product of planar rotations, a planar rotation or reflection and a scalar transformation. Also, we are able to conclude that an orthogonal transformation is a product of planar rotations and a planar rotation or a reflection.

Srikanth K. V.; Raj Bhawan Yadav

2013-09-10T23:59:59.000Z

92

Inverter testing at Sandia National Laboratories  

SciTech Connect

Inverters are key building blocks of photovoltaic (PV) systems that produce ac power. The balance of systems (BOS) portion of a PV system can account for up to 50% of the system cost, and its reliable operation is essential for a successful PV system. As part of its BOS program, Sandia National Laboratories (SNL) maintains a laboratory wherein accurate electrical measurements of power systems can be made under a variety of conditions. This paper outlines the work that is done in that laboratory.

Ginn, J.W.; Bonn, R.H.; Sittler, G. [Sandia National Labs., Albuquerque, NM (United States). Photovoltaic System Components Dept.

1997-04-01T23:59:59.000Z

93

Status and Needs of Power Electronics for Photovoltaic Inverters  

DOE Green Energy (OSTI)

Photovoltaics is the utility connected distributed energy resource (DER) that is in widespread use today. It has one element, the inverter, which is common with all DER sources except rotating generators. The inverter is required to transfer dc energy to ac energy. With all the DER technologies, (solar, wind, fuel cells, and microturbines) the inverter is still an immature product that will result in reliability problems in fielded systems. Today, the PV inverter is a costly and complex component of PV systems that produce ac power. Inverter MTFF (mean time to first failure) is currently unacceptable. Low inverter reliability contributes to unreliable fielded systems and a loss of confidence in renewable technology. The low volume of PV inverters produced restricts the manufacturing to small suppliers without sophisticated research and reliability programs or manufacturing methods. Thus, the present approach to PV inverter supply has low probability of meeting DOE reliability goals. DOE investments in power electronics are intended to address the reliability and cost of power electronics. This report details the progress of power electronics, identifies technologies that are in current use, and explores new approaches that can provide significant improvements in inverter reliability while leading to lower cost. A key element to improved inverter design is the systems approach to design. This approach includes a list of requirements for the product being designed and a preliminary requirements document is a part of this report. Finally, the design will be for a universal inverter that can be applied to several technologies. The objective of a universal inverter is to increase the quantity being manufactured so that mass-manufacturing techniques can be applied. The report includes the requirements and recommended design approaches for a new inverter with a ten-year mean time to first failure (MTFF) and with lower cost. This development will constitute a ''leap forward'' in capability that leverages emerging technologies and best manufacturing processes to produce a new, high reliability, inverter. The targeted inverter size is from two to ten kilowatts. The report is organized into four sections. A brief introduction by Sandia is followed by Section Two from Millennium Technologies (a company with UPS experience). Section Three is provided by Xantrex (a PV manufacturing company) and the University of Minnesota provided Section Four. This report is very detailed and provides inverter design information that is irrelevant to the layman. It is intended to be a comprehensive documentation of proven technology and the manufacturing skills required to produce a high reliability inverter. An accompanying report will provide a summary of the recommended approach for inverter development.

QIN, YU CHIN; MOHAN, NED; WEST, RICK; BONN, RUSSELL H.

2002-06-01T23:59:59.000Z

94

Status and Needs of Power Electronics for Photovoltaic Inverters  

SciTech Connect

Photovoltaics is the utility connected distributed energy resource (DER) that is in widespread use today. It has one element, the inverter, which is common with all DER sources except rotating generators. The inverter is required to transfer dc energy to ac energy. With all the DER technologies, (solar, wind, fuel cells, and microturbines) the inverter is still an immature product that will result in reliability problems in fielded systems. Today, the PV inverter is a costly and complex component of PV systems that produce ac power. Inverter MTFF (mean time to first failure) is currently unacceptable. Low inverter reliability contributes to unreliable fielded systems and a loss of confidence in renewable technology. The low volume of PV inverters produced restricts the manufacturing to small suppliers without sophisticated research and reliability programs or manufacturing methods. Thus, the present approach to PV inverter supply has low probability of meeting DOE reliability goals. DOE investments in power electronics are intended to address the reliability and cost of power electronics. This report details the progress of power electronics, identifies technologies that are in current use, and explores new approaches that can provide significant improvements in inverter reliability while leading to lower cost. A key element to improved inverter design is the systems approach to design. This approach includes a list of requirements for the product being designed and a preliminary requirements document is a part of this report. Finally, the design will be for a universal inverter that can be applied to several technologies. The objective of a universal inverter is to increase the quantity being manufactured so that mass-manufacturing techniques can be applied. The report includes the requirements and recommended design approaches for a new inverter with a ten-year mean time to first failure (MTFF) and with lower cost. This development will constitute a ''leap forward'' in capability that leverages emerging technologies and best manufacturing processes to produce a new, high reliability, inverter. The targeted inverter size is from two to ten kilowatts. The report is organized into four sections. A brief introduction by Sandia is followed by Section Two from Millennium Technologies (a company with UPS experience). Section Three is provided by Xantrex (a PV manufacturing company) and the University of Minnesota provided Section Four. This report is very detailed and provides inverter design information that is irrelevant to the layman. It is intended to be a comprehensive documentation of proven technology and the manufacturing skills required to produce a high reliability inverter. An accompanying report will provide a summary of the recommended approach for inverter development.

QIN, YU CHIN; MOHAN, NED; WEST, RICK; BONN, RUSSELL H.

2002-06-01T23:59:59.000Z

95

Plasma arc torch with coaxial wire feed  

SciTech Connect

A plasma arc welding apparatus having a coaxial wire feed. The apparatus includes a plasma arc welding torch, a wire guide disposed coaxially inside of the plasma arc welding torch, and a hollow non-consumable electrode. The coaxial wire guide feeds non-electrified filler wire through the tip of the hollow non-consumable electrode during plasma arc welding. Non-electrified filler wires as small as 0.010 inches can be used. This invention allows precision control of the positioning and feeding of the filler wire during plasma arc welding. Since the non-electrified filler wire is fed coaxially through the center of the plasma arc torch's electrode and nozzle, the wire is automatically aimed at the optimum point in the weld zone. Therefore, there is no need for additional equipment to position and feed the filler wire from the side before or during welding.

Hooper, Frederick M (Albuquerque, NM)

2002-01-01T23:59:59.000Z

96

Preparation of Aluminum Nickel Nanosized Powders by Pulsed Wire ...  

Science Conference Proceedings (OSTI)

With the direct heating of wire by the current, the whole wire evaporates within a few microseconds and then condenses in inert gas. Wound wires with two or ...

97

Laser Cladding with Hybrid Hot Wire - Programmaster.org  

Science Conference Proceedings (OSTI)

Presentation Title, Laser Cladding with Hybrid Hot Wire ... The Laser Hot Wire process is used to deposit solid and cored wire products onto hydraulic shafts and ...

98

Wire Making Techniques - HTS Coated Conductors - Fact Sheet ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wire Making Techniques - HTS Coated Conductors - Fact Sheet Wire Making Techniques - HTS Coated Conductors - Fact Sheet Wire Making Techniques - HTS Coated Conductors - Fact Sheet...

99

Vehicles - ORNL inverter a boost for EVs . . . | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Vehicles - ORNL inverter a boost for EVs . . . Vehicles - ORNL inverter a boost for EVs . . . Less expensive, lighter and more efficient inverters could put hybrid electric vehicles on the highway to improved viability. While batteries receive a lot of attention, Oak Ridge National Laboratory inventor Gui-Jia Su noted that inverters, which convert direct current into alternating current, play an equally important role in powering hybrid electric vehicles. The patent-pending ORNL inverter is more compact, reduces battery losses, improves operating conditions and reliability, and can be operated in high-temperature conditions. The inverter also significantly reduces undesirable motor torque ripples, which increase or decrease output torque as the output shaft rotates. In addition to uses in hybrid electric

100

Multilevel cascade voltage source inverter with seperate DC sources  

SciTech Connect

A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

Peng, Fang Zheng (Oak Ridge, TN); Lai, Jih-Sheng (Knoxville, TN)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Multilevel cascade voltage source inverter with seperate DC sources  

DOE Patents (OSTI)

A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

Peng, Fang Zheng (Knoxville, TN); Lai, Jih-Sheng (Blacksburg, VA)

2002-01-01T23:59:59.000Z

102

Novel multilevel inverter carrier-based PWM method  

SciTech Connect

The advent of the transformerless multilevel inverter topology has brought forth various pulsewidth modulation (PWM) schemes as a means to control the switching of the active devices in each of the multiple voltage levels in the inverter. An analysis of how existing multilevel carrier-based PWM affects switch utilization for the different levels of a diode-clamped inverter is conducted. Two novel carrier-based multilevel PWM schemes are presented which help to optimize or balance the switch utilization in multilevel inverters. A 10-kW prototype six-level diode-clamped inverter has been built and controlled with the novel PWM strategies proposed in this paper to act as a voltage-source inverter for a motor drive.

Tolbert, L.M.; Habetler, T.G.

1999-10-01T23:59:59.000Z

103

Discrete pulse modulation strategies for high-frequency inverter systems  

SciTech Connect

High-performance high-frequency inverter systems for UPS applications represent a demanding application that cannot be easily realized using conventional hard-switched PWM inverter topologies. Adoption of typical soft-switched inverters such as the resonant dc link inverter require the use of discrete pulse modulation strategies. New controller structures are necessary to cope with stringent voltage regulation and distortion constraints in the presence of unbalanced and nonlinear loads. This paper presents a controller that utilizes load current feed-forward strategy with a cost function current regulator to achieve excellent transient performance characteristics. Voltage regulation is ensured using a synchronous frame regulator. Detailed simulation and experimental results verifying the concepts are presented. Although this paper focuses on soft-switching inverters, the control concepts can be applied to conventional hard-switching inverters as well.

Venkataramanan, G. (Montana State Univ., Bozeman, MT (United States). Dept. of Electrical Engineering); Divan, D.M. (Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering); Jahns, T.M. (General Electric Co., Schenectady, NY (United States))

1993-07-01T23:59:59.000Z

104

Multilevel cascade voltage source inverter with separate DC sources  

DOE Patents (OSTI)

A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations. 15 figs.

Peng, F.Z.; Lai, J.S.

1997-06-24T23:59:59.000Z

105

Textural break foundation wall construction modules  

SciTech Connect

Below-grade, textural-break foundation wall structures are provided for inhibiting diffusion and advection of liquids and gases into and out from a surrounding hydrogeologic environment. The foundation wall structure includes a foundation wall having an interior and exterior surface and a porous medium disposed around a portion of the exterior surface. The structure further includes a modular barrier disposed around a portion of the porous medium. The modular barrier is substantially removable from the hydrogeologic environment.

Phillips, Steven J. (Kennewick, WA)

1990-01-01T23:59:59.000Z

106

Foundation and Computing Research Center.  

NLE Websites -- All DOE Office Websites (Extended Search)

w w w w. s a n d i a . g o v The idea drove a wave of technology that transformed society so that today, people carry cell phones that are little supercomputers. But the Moore's Law era - which lasted far longer than Moore himself expected - is coming to an end. The speed of laptops and desktops has plateaued while the power required to run systems is rising sharply. And industry can't continue cramming more transistors onto chips indefinitely. Major change is about a decade away, says Rob Leland, director of Sandia National Laboratories' Computing and information Sciences (CiS) Research Foundation and Computing Research Center. "We need a new type of computing device, new materials, new designs, and it's not at all clear what that should be," Leland says. "it has to be something

107

High efficiency inverter and ballast circuits  

SciTech Connect

A high efficiency push-pull inverter circuit employing a pair of relatively high power switching transistors is described. The switching on and off of the transistors is precisely controlled to minimize power losses due to common-mode conduction or due to transient conditions that occur in the process of turning a transistor on or off. Two current feed-back transformers are employed in the transistor base drives; one being saturable for providing a positive feedback, and the other being non-saturable for providing a subtractive feedback.

Nilssen, O.K.

1984-02-07T23:59:59.000Z

108

Operating standby redundant controller to improve voltage source inverter reliability .  

E-Print Network (OSTI)

??This thesis presents a control architecture that achieves operating standby redundancy for a voltage source inverter controller. The system was designed to increase reliability by… (more)

Blevins, Stephen T.

2007-01-01T23:59:59.000Z

109

Role of inverters in grid of the future  

Science Conference Proceedings (OSTI)

... SiC-based components Control systems for inverters Better plastics in packaging that lasts more than 10-15 years. Technology ...

2012-09-11T23:59:59.000Z

110

Controlling engine exhaust gas recirculation and vacuum inverter  

SciTech Connect

Engine manifold vacuum is inverted by an in-line vacuum inverter which provides a power source for an egr valve actuator for providing desired egr flow in a predetermined range of engine power loading and egr flow is cut off outside the range. The invention utilizes a vacuum inverter employing a pair of spaced diaphragms for controlling an atmospheric air bleed valve to a vacuum chamber powered by manifold vacuum. The diaphragms are spring loaded so as to seek equilibrium positions as vacuum in the chamber varies force. The inverter produces a vacuum output signal which changes inversely with changes in engine manifold vacuum.

Bradshaw, C.E.; Uitvlugt, M.W.

1982-12-28T23:59:59.000Z

111

2012 SG Peer Review - Smart Inverter Controls and Microgrid Interopera...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

* On-gridislanding modes * MG Energy Management * Integration of renewables d Multiple smart inverters Flexible test bed Tech transfer MG architecture FY12: 12% Load...

112

Electrical wire insulation and electromagnetic coil  

DOE Patents (OSTI)

An electromagnetic coil for high temperature and high radiation application in which glass is used to insulate the electrical wire. A process for applying the insulation to the wire is disclosed which results in improved insulation properties.

Bich, George J. (Penn Hills, PA); Gupta, Tapan K. (Monroeville, PA)

1984-01-01T23:59:59.000Z

113

Beam buckling on random elastic foundations.  

E-Print Network (OSTI)

??This thesis explores the impact of the seafloor on the buckling load of an undersea pipeline via beam on elastic foundation buckling theory. Undersea pipelines… (more)

Bee, Geoffrey

2013-01-01T23:59:59.000Z

114

Sandia National Laboratories: Research: Research Foundations...  

NLE Websites -- All DOE Office Websites (Extended Search)

Starodub and Kevin McCarty around the Low Energy Electron Microscope used to study graphene growth. Sandia's Materials Science Research Foundation works to understand materials...

115

Foundation and Moisture Control Research Project | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Project The U.S. Department of Energy (DOE) is currently conducting research into building foundation and moisture control technologies. Moisture is a significant market...

116

Lightweight PV Inverters: Dual Bi-Directional IGBTs Modules Enables Breakthrough PV Inverter Using Current Modulation Topology  

Science Conference Proceedings (OSTI)

Solar ADEPT Project: PV inverters convert DC power generated by modules into usable AC power. IPC’s initial 30kW 94lb. PV inverter reduces the weight of comparable 30kW PV inverters by 90%—reducing the cost of materials, manufacturing, shipping, and installation. With ARPA-E support, new bi-directional silicon power switches will be developed, commercialized, and utilized in IPC’s next-generation PV inverter. With these components, IPC will produce 100kW inverters that weight less than 100lb., reducing the weight of conventional 3,000lb. 100kW inverters by more than 95%. The new power switches will cut IPC’s $/W manufacturing cost in half, as well as further reduce indirect shipping and installation costs.

None

2012-01-30T23:59:59.000Z

117

Dual Mode Inverter Control Test Verification  

SciTech Connect

Permanent Magnet Motors with either sinusoidal back emf (permanent magnet synchronous motor [PMSM]) or trapezoidal back emf (brushless dc motor [BDCM]) do not have the ability to alter the air gap flux density (field weakening). Since the back emf increases with speed, the system must be designed to operate with the voltage obtained at its highest speed. Oak Ridge National Laboratory's (ORNL) Power Electronics and Electric Machinery Research Center (PEEMRC) has developed a dual mode inverter controller (DMIC) that overcomes this disadvantage. This report summarizes the results of tests to verify its operation. The standard PEEMRC 75 kW hard-switched inverter was modified to implement the field weakening procedure (silicon controlled rectifier enabled phase advance). A 49.5 hp motor rated at 2800 rpm was derated to a base of 400 rpm and 7.5 hp. The load developed by a Kahn Industries hydraulic dynamometer, was measured with a MCRT9-02TS Himmelstein and Company torque meter. At the base conditions a current of 212 amperes produced the 7.5 hp. Tests were run at 400, 1215, and 2424 rpm. In each run, the current was no greater than 214 amperes. The horsepower obtained in the three runs were 7.5, 9.3, and 8.12. These results verified the basic operation of the DMIC in producing a Constant Power Speed Ratios (CPSR) of six.

Bailey, J.M.

2001-04-25T23:59:59.000Z

118

Concrete Foundations in Substations and Transmission Lines  

Science Conference Proceedings (OSTI)

This report presents the results of surveys conducted to obtain information on the degradation of concrete foundations that support transmission towers and high-voltage substation equipment. Although concrete foundations are simple and inexpensive, their degradation or failure may have costly consequences, including potential equipment damage and the need for outages to allow movement of critical equipment so the ...

2012-12-14T23:59:59.000Z

119

Adaptable Inverter for Injection of Fuel Cell and Photovoltaic Power  

E-Print Network (OSTI)

important to apply renewable energies and efficient technologies. For power injection of photovoltaic with different energy sources such as photovoltaic, fuel cell and battery. It is possible to adjust active inverter. These inverters for injection of photovoltaic energy are developed only for this purpose

Kulig, Stefan

120

Scalable techniques for document identifier assignment in inverted indexes  

Science Conference Proceedings (OSTI)

Web search engines depend on the full-text inverted index data structure. Because the query processing performance is so dependent on the size of the inverted index, a plethora of research has focused on fast end effective techniques for compressing ... Keywords: documentID reassignment, index compression

Shuai Ding; Josh Attenberg; Torsten Suel

2010-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Droop-Controlled Inverters in Microgrids are Kuramoto Oscillators  

E-Print Network (OSTI)

Droop-Controlled Inverters in Microgrids are Kuramoto Oscillators John W. Simpson-Porco Florian D and renewable energy, we study the parallel operation of DC/AC inverters in a lossless microgrid. We show; Electric power systems; Load flow solutions; 1. INTRODUCTION Microgrids appear to be the most natural

Bullo, Francesco

122

Phase Locked Loop Control of Inverters in a Microgrid  

E-Print Network (OSTI)

Phase Locked Loop Control of Inverters in a Microgrid Matthew Surprenant Dept of ECE University Venkataramanan Dept of ECE University of Wisconsin Madison, WI, USA Abstract--Microgrids are small for inverter-based microsources within a mi- crogrid. The general control philosophy within a microgrid

Hiskens, Ian A.

123

Results of Sandia National Laboratories grid-tied inverter testing  

SciTech Connect

This paper proposes a definition for a Non-Islanding Inverter. This paper also presents methods that can be used to implement such an inverter, along with references to prior work on the subject. Justification for the definition is provided on both a theoretical basis and results from tests conducted at Sandia National Laboratories and Ascension Technology, Inc.

Kern, G.A. [Ascension Technology, Inc., Boulder, CO (United States); Bonn, R.H.; Ginn, J.; Gonzalez, S. [Sandia National Labs., Albuquerque, NM (United States)

1998-07-01T23:59:59.000Z

124

Optimal Dispatch of Photovoltaic Inverters in Residential Distribution Systems  

E-Print Network (OSTI)

- fined limit. The premise for these active power curtailment (APC) strategies is that the resistance method for determining the active- and reactive-power set points for PV inverters in resi- dential. Index Terms--Distribution networks, inverter control, photo- voltaic systems, optimal power flow

Giannakis, Georgios

125

Zero-switching-loss inverters for high-power applications  

SciTech Connect

The development of zero-switching-loss inverters has attracted much interest for industrial applications. The resonant dc link inverter (RDCLI) provides a simple and robust approach for realizing switching frequencies >20 kHz in multi-kilowatt systems but impresses substantial voltage stress (-- 2.5 supply voltage) across the devices. Two alternate topologies for realizing zero switching losses in high-power converters are proposed. The actively clamped resonant dc-link inverter (ACRLI) uses the concept of a lossless active clamp to restrict voltage stresses to only 1.3-1.5 supply voltage (V/sub s/) while maintaining a mode of operation similar to the RDCLI. For applications demanding substantially superior spectral performance, the resonant pole inverter (RPI), also called the quasi-resonant current mode inverter (QRCMI), is proposed as a viable topology. Detailed analysis, simulation, and experimental results are presented to verify operation principles of both power converters.

Divan, D.M.; Skibinski, G. (Wisconsin Univ., Madison, WI (USA). Dept. of Electrical and Computer Engineering)

1989-07-01T23:59:59.000Z

126

Experimental Analysis of Variable Capacity Heat Pump Systems equipped with a liquid-cooled frequency inverter.  

E-Print Network (OSTI)

?? Using an inverter-driven compressor in variable capacity heat pump systems has a main drawback, which is the extra loss in the inverter. The present… (more)

Ebraheem, Thair

2013-01-01T23:59:59.000Z

127

Analysis of inverter models and harmonic propagation. Part III. Transient processes in inverter models  

SciTech Connect

Part III of a three part study presents the theoretical analysis and the experimental verification of transient processes that arise in the photovoltaic power system during its normal commutational operations. A general description of the transient processes problem and the method of analysis is presented. The transient processes in the inverter model with an inductive filter are analyzed for both the discontinuous and the continuous currents on the dc side of the inverter, and the problem of transient processes due to the change in illumination level is discussed. Transient processes in the inverter model with capacitive filter are analyzed with special emphasis on the process that arises in the photovoltaic power system immediately after the first ignition of the thyristors. The influence of the operating point of the solar cell array on the transient process is discussed. A sequence for optimal operations is recommended. Part I of the study (SAND 7040/1) contains a detailed description of the microcomputer based simulator that represents the output characteristics of the five commercially available types of solar cell arrays under different environmental conditions, and Part II (SAND 7040/2) describes the harmonics in the photovoltaic power system.

Slonim, M.A.; Stanek, E.K.

1984-09-01T23:59:59.000Z

128

Test Report: Cost Effective Foundation Insulation  

SciTech Connect

A field experiment was conducted to demonstrate and quantify the thermal effectiveness of rigid insulation board when installed on the exterior of a buried concrete foundation wall. A heated, insulated box was constructed along one wall of an existing, unheated building to simulate the living space of a home. The crawl space beneath the living space was divided into two sections. One featured external foundation insulation, while the other side had none. 36 temperature and heat flux sensors were installed at predetermined locations to measure the temperature profile and heat flow out of the living space. The temperature profile through the foundation was then used to calculate the total heat flow out of the foundation for both cases. This experiment showed that a significant energy savings is available with exterior foundation insulation. Over the course of 3 months, the heat-loss differential between the insulated and non-insulated foundations was 4.95 kilowatt-hours per lineal foot of foundation wall, for a ratio of 3:1. For a 2200 sq. ft home with a foundation perimeter 200 ft. long, this would amount to a savings of 990 kW-hrs in just 3 months, or 330 kW-hrs per month. Extrapolating to an 8-month heating year, we would expect to save over 2640 kW-hrs per year for such a home. The savings for a basement foundation, rather than a crawlspace, would be approach twice that amount, nearing 5280 kW-hr per year. Because these data were not collected during the coldest months of the year, they are conservative, and greater savings may be expected during colder periods.

Jeffrey M. Lacy; T. E. Rahl; G. A. Twitchell; R. G. Kobbe

2003-06-01T23:59:59.000Z

129

Method and apparatus for laying wire arrays  

DOE Patents (OSTI)

Wire arrays (11) having a continuous wire (12) which is formed into a predetermined pattern and adhered to a backing material or substrate (13) are fabricated by applying adhesive material (16a, 16b) along opposite edge portions (17, 18) of the substrate, positioning a row of winding spools (21) along each of the edge portions and repeatedly extending the wire between and around successive spools at the opposite edge portions. The wound wire is then traveled along each spool toward the substrate and into contact with the adhesive. The spools are then removed and a coating of hardenable material (54) is applied to secure the wound wire to the substrate. Tension in the wire is relieved prior to contact of the wire with the adhesive and a small amount of slack is introduced into the wire before the final coating step. Mechanism (32) is provided for lifting the spools away from the substrate without disturbing the wound wire. The method and apparatus enable manufacture of precisely configured wire arrays without complex or costly equipment and do not require structural alterations in the substrate for the purpose of accommodating to fabrication equipment.

Horowitz, Seymour M. (6525 Swainland Dr., Oakland, CA 94611); Nesbitt, Dale D. (1712 Marin Ave., Berkeley, CA 94707)

1986-01-01T23:59:59.000Z

130

United Nations Foundation (UNF) | Open Energy Information  

Open Energy Info (EERE)

United Nations Foundation (UNF) United Nations Foundation (UNF) Jump to: navigation, search Logo: United Nations Foundation Name United Nations Foundation Address 1800 Massachusetts Avenue NW, Suite 400 Place Washington, DC Zip 20036 Region Northeast - NY NJ CT PA Area Coordinates 38.90879°, -77.042271° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.90879,"lon":-77.042271,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

131

Tropical Forest Foundation | Open Energy Information  

Open Energy Info (EERE)

Tropical Forest Foundation Tropical Forest Foundation Jump to: navigation, search Logo: Tropical Forest Foundation Name Tropical Forest Foundation Address 2121 Eisenhower Ave. Suite 200 Place Alexandria, Virginia Zip 22314 Region Northeast - NY NJ CT PA Area Phone number 703.518.8834 Website http://tropicalforestfoundatio Coordinates 38.8013734°, -77.0668734° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.8013734,"lon":-77.0668734,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

132

Galveston Historical Foundation | Open Energy Information  

Open Energy Info (EERE)

Historical Foundation Historical Foundation Jump to: navigation, search Logo: Galveston Historical Foundation Name Galveston Historical Foundation Address 502 20th St. Place Galveston, Texas Zip 77550 Region Texas Area Number of employees 11-50 Year founded 1954 Phone number 409-765-7834 Website http://www.galvestonhistory.or Coordinates 29.3054013°, -94.7900179° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.3054013,"lon":-94.7900179,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

133

Foundations of uncertain-data integration  

Science Conference Proceedings (OSTI)

There has been considerable past work studying data integration and uncertain data in isolation. We develop the foundations for local-as-view (LAV) data integration when the sources being integrated are uncertain. We motivate two distinct settings ...

Parag Agrawal; Anish Das Sarma; Jeffrey Ullman; Jennifer Widom

2010-09-01T23:59:59.000Z

134

Theoretical foundations for the study of sociomateriality  

Science Conference Proceedings (OSTI)

This paper compares two alternative theoretical foundations upon which the study of sociomateriality can be built: agential realism and critical realism. It begins by providing a brief overview of the sociomaterial perspective on organizational practices ...

Paul M. Leonardi

2013-04-01T23:59:59.000Z

135

Tribal Renewable Energy Curriculum Foundational Course: Biomass  

Energy.gov (U.S. Department of Energy (DOE))

Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on biomass renewable energy by clicking on the .swf link below. You can also download the PowerPoint slides...

136

Spectroscopic research of underwater electrical wire explosion  

Science Conference Proceedings (OSTI)

Results of spectroscopic research in the visible range of light of the radiation generated by underwater electrical wire explosions (UEWE) are presented. A pulsed generator with an output voltage of {approx}110 kV, current of {approx}70 kA, and rise time of {approx}60 ns was used for electrical explosion of Cu wires 0.1 mm in diameter and 50 mm in length. It was shown that UEWE is not governed by the 'polarity' effect, which plays an important role in electrical wire explosions in vacuum. The results of detailed space- and time-resolved spectroscopic measurements show that the radiation spectrum differs significantly of the spectrum expected from the exploding wire. A model is suggested based on the formation of a few {mu}m 'water' plasma layer in the vicinity of the exploding wire plasma which efficiently absorbs the radiation of the exploding wire.

Fedotov, A.; Sheftman, D.; Gurovich, V. Tz.; Efimov, S.; Bazilitski, G.; Krasik, Ya. E. [Physics Department, Technion-Israel Institute of Technology, 32000 Haifa (Israel); Oreshkin, V. I. [Institute of High Current Electronics, RAS, Tomsk (Russian Federation)

2008-08-15T23:59:59.000Z

137

TMS Foundation Receives Planned Gift from Dr. Martin E. Glicksman  

Science Conference Proceedings (OSTI)

Mr. Martin E. Glicksman, of Rensselaer Polytechnic Institute, recently made plans for a substantial planned gift to the TMS Foundation. The Foundation ...

138

DOE Office of Indian Energy Foundational Course on Strategic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Office of Indian Energy Foundational Course: Strategic Energy Planning (text version) Below is the text version of the Webinar titled "DOE Office of Indian Energy Foundational...

139

Indian Renewable Energy Foundation Ltd IREF | Open Energy Information  

Open Energy Info (EERE)

Renewable Energy Foundation Ltd IREF Jump to: navigation, search Name Indian Renewable Energy Foundation Ltd. (IREF) Place Mumbai, Maharashtra, India Zip 400 055 Sector Wind energy...

140

Direct Comparison of Inverted and Non-Inverted Growths of GaInP Solar Cells: Preprint  

DOE Green Energy (OSTI)

The inverted growth of III-V solar cells presents some specific challenges that are not present in regular, non-inverted growths. Because the highly doped top contact layer is grown first, followed by the lengthy high-temperature growth of the remainder of the structure, there is ample time for the dopants in the contact layer to diffuse away. This leads to an increase in the contact resistance to the top layer, and a corresponding drop in voltage. The diffusion of dopants in other layers is similarly altered with respect to the non-inverted configuration because of the change in growth sequence. We compare the dopant profiles of inverted and non-inverted structures by using secondary ion mass spectroscopy and correlate the results with the observed performance of the devices. We also describe a technique for growing a GaInAsN contact layer in the inverted configuration and show that it achieves a specific contact resistance comparable to what is normally observed in non-inverted cells.

Steiner, M. A.; Geisz, J. F.; Reedy Jr, R.C.; Kurtz, S.

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Mixed and Dynamic Response of Hot Wires and Cold Wires and Measurements of Turbulence Statistics  

Science Conference Proceedings (OSTI)

Hot wires respond to temperature as well as to velocity, whereas cold wires respond to velocity as well as to temperature. The static and dynamic response characteristics are summarized and it is shown that the frequency transfer functions for ...

S. E. Larsen; J. Hojstrup; C. W. Fairall

1986-06-01T23:59:59.000Z

142

High Strength Gold Wire for Microelectronics Miniaturization ...  

ISU and Ames Laboratory researchers have developed a high strength gold wire for use in microelectronics that can maintain its electrical and mechanical properties ...

143

ORNL superconducting wire yields unprecedented performance |...  

NLE Websites -- All DOE Office Websites (Extended Search)

ORNL | News | News Releases | 2013 SHARE Media Contact: Morgan McCorkle Communications 865.574.7308 ORNL superconducting wire yields unprecedented performance This figure shows the...

144

Thin californium-containing radioactive source wires  

SciTech Connect

A cermet wire includes at least 1% californium-252 and is characterized by a diameter of no more than 0.0225 inch.

Gross, Ian G (Clinton, TN); Pierce, Larry A (Kingston, TN)

2012-01-03T23:59:59.000Z

145

Inverted Metamorphic Multijunction (IMM) Cell Processing Instructions  

DOE Green Energy (OSTI)

This technical report details the processing schedule used to fabricate Inverted Metamorphic Multijunction (IMM) concentrator solar cells at The National Renewable Energy Laboratory (NREL). These devices are used as experimental test structures to support the research at NREL that is focused on increasing the efficiency of photovoltaic power conversion. They are not intended to be devices suitable for deployment in working concentrator systems primarily because of heat sinking issues. The process schedule was developed to be compatible with small sample sizes and to afford relatively rapid turn-around times, in support of research efforts. The report describes the use of electro deposition of gold for both the back and front contacts. Electro-deposition is used because of its rapid turn around time and because it is a benign metallization technique that is seldom responsible for damage to the semiconductors. The layer transfer technique is detailed including the use of a commercially available adhesive and the etching away of the parent gallium arsenide substrate. Photolithography is used to define front contact grids as well as the mesa area of the cell. Finally, the selective wet chemical etchant system is introduced and its use to reveal the back contact is described.

Duda, A.; Ward, S.; Young, M.

2012-02-01T23:59:59.000Z

146

Inverter Testing at Sandia National Laboratories* Jerry W. Ginn  

Office of Scientific and Technical Information (OSTI)

Inverter Testing at Sandia National Inverter Testing at Sandia National Laboratories* Jerry W. Ginn Russell H. Bonn Photovoltaic System Components Department Sandia National Laboratories PO Box 5800 Albuquerque, NM 87185-0752 Abstract. Inverters are key building blocks of photovoltaic (PV) systems that produce ac power. The balance of systems @OS) portion of a PV system can account for up to 50% of the system cost, and its reliable operation is essential for a successful PV system. As part of its BOS program, Sandia National Laboratories (SNL) maintains a laboratory wherein accurate electrical measurements of power systems can be made under a variety of conditions. This paper outlines the work that is done in that laboratory. TESTING ACTIVITIES Inverter testing at SNL thus far

147

Definition: Controllable/Regulating Inverter | Open Energy Information  

Open Energy Info (EERE)

Controllable/Regulating Inverter Controllable/Regulating Inverter Jump to: navigation, search Dictionary.png Controllable/Regulating Inverter AC to DC converters that properly regulate voltage and can be controlled remotely. These devices can significantly increase the integration of renewable or intermittent sources of electricity.[1] View on Wikipedia Wikipedia Definition Also Known As Mechanical rectifier Related Terms electricity generation References ↑ [www.smartgrid.gov/sites/default/files/pdfs/description_of_assets.pdf SmartGrid.gov 'Description of Assets'] An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Controllable/Regulating_Inverter&oldid=480447" Categories:

148

Optically Isolated HVIGBT Based MW Cascade Inverter Building...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

High-Voltage, IGBT-Based Inverter for DER Applications Presentation at DOE Energy Storage Systems Research Program Peer Review Washington, DC November 2, 2006 SBIR Phase II Grant...

149

Series Resonant Inverter with Contactless Transformers for Multiple LED Lamps.  

E-Print Network (OSTI)

??A half-bridge series-resonant inverter adopted to realize the quasi current source and the constant current source with a number of contactless transformers in series for… (more)

Cheng, Shuen-Wen

2013-01-01T23:59:59.000Z

150

Performance model for grid-connected photovoltaic inverters.  

SciTech Connect

This document provides an empirically based performance model for grid-connected photovoltaic inverters used for system performance (energy) modeling and for continuous monitoring of inverter performance during system operation. The versatility and accuracy of the model were validated for a variety of both residential and commercial size inverters. Default parameters for the model can be obtained from manufacturers specification sheets, and the accuracy of the model can be further refined using measurements from either well-instrumented field measurements in operational systems or using detailed measurements from a recognized testing laboratory. An initial database of inverter performance parameters was developed based on measurements conducted at Sandia National Laboratories and at laboratories supporting the solar programs of the California Energy Commission.

Boyson, William Earl; Galbraith, Gary M.; King, David L.; Gonzalez, Sigifredo

2007-09-01T23:59:59.000Z

151

Triple inverter pierce oscillator circuit suitable for CMOS  

SciTech Connect

An oscillator circuit is disclosed which can be formed using discrete field-effect transistors (FETs), or as a complementary metal-oxide-semiconductor (CMOS) integrated circuit. The oscillator circuit utilizes a Pierce oscillator design with three inverter stages connected in series. A feedback resistor provided in a feedback loop about a second inverter stage provides an almost ideal inverting transconductance thereby allowing high-Q operation at the resonator-controlled frequency while suppressing a parasitic oscillation frequency that is inherent in a Pierce configuration using a "standard" triple inverter for the sustaining amplifier. The oscillator circuit, which operates in a range of 10 50 MHz, has applications for use as a clock in a microprocessor and can also be used for sensor applications.

Wessendorf; Kurt O. (Albuquerque, NM)

2007-02-27T23:59:59.000Z

152

Regional Characteristics for Interpreting Inverted Echo Sounder (IES) Observations  

Science Conference Proceedings (OSTI)

Changes in round-trip acoustc travel time (?) measured between a bottom moored inverted echo sounder and the sea surface can be interpreted as changes in dynamic height (D) with suitable calibration information. The ?, D, and isotherm and ...

Zachariah R. Hallock

1987-06-01T23:59:59.000Z

153

The Application of Diode-Clamped Cascaded Inverter in the Direct-Driven Wind Power System  

Science Conference Proceedings (OSTI)

Power inverter is widely used in direct-driven variable speed constant frequency (VSVF) wind power system. With the level of wind power jumping from the kilowatt to megawatt, topologies and control of inverter have a corresponding change. Considering ... Keywords: direct-driven wind power, multi-level inverter, diode-clamped cascaded inverter, PD-SPWM and CPS-SPWM

Xianglian Xu; Pingting Xu; Zilin Tang; Gang Tang; Xiaole Ye

2012-04-01T23:59:59.000Z

154

Smart Inverter Advanced Metering Infrastructure Integration Using Smart Energy Profile  

Science Conference Proceedings (OSTI)

Cost-effective integration of high penetrations of photovoltaic (PV) systems will require some level of communications and direct control of PV inverters. Approaches leveraging broadband and utility remote terminal units (RTU) are generally not scalable to smaller scale residential or small commercial inverters. Given the potential addition of many thousands of residential PV systems in the coming years, identifying a low-cost solution allowing control and communications with residential systems has ...

2013-08-15T23:59:59.000Z

155

Smart Inverter Field Experiences: A State of the Industry Overview  

Science Conference Proceedings (OSTI)

The inverters that connect solar photovoltaic, battery, and other distributed resources to the power grid have the potential to provide a number of services or functions that may be useful to utilities. Inverter manufacturers have been designing and implementing these capabilities into their products for many years. During the past few years, significant industry effort has been expended in the identification of a common set of such functions that may be supported by open standards and implemented ...

2013-12-23T23:59:59.000Z

156

Test Protocol for Smart Inverter Grid Support Functions: Version 1  

Science Conference Proceedings (OSTI)

Smart inverters are capable of providing grid support that is important to accommodate higher penetrations of distributed energy resources (DERs) on the distribution circuits. With the exception of a few countries in Europe, especially Germany, there are currently no clear and consistent performance requirements defined for the smart inverter advanced support functions. Currently, widely adopted grid interconnection standard IEEE Std. 1547 (2003) and the associated conformance test standard IEEE ...

2013-12-20T23:59:59.000Z

157

ADAPTIVE HYSTERESIS CURRENT CONTROL OF INVERTER FOR SOLAR PHOTOVOLTAIC APPLICATIONS  

E-Print Network (OSTI)

Abstract – Power inverters are used to convert the D.C power produced by the solar photovoltaic cell into AC. This paper presents a novel Adaptive Hysteresis Current Controller to control the inverter, used in the solar photovoltaic cell. The proposed controller is capable of reducing the total harmonic distortion and to provide constant switching frequency. The mathematical model of Photovoltaic array is developed using the Newton’s method using the parameter obtained from a commercial photovoltaic data sheet under variable weather conditions, in which the effect of irradiance and temperature are considered. The modeled Photovoltaic array is interfaced with DC-DC boost converter, AC-DC inverter and load. A DC-DC boost converter is used to step up the input DC voltage of the Photovoltaic array while the DC-AC single-phase inverter converts the input DC comes from boost converter into AC. The performance of the proposed controller of inverter is evaluated through MATLAB-Simulation. The results obtained with the proposed algorithm are compared with those obtained when using conventional fixed hysteresis current controller for single-phase photovoltaic inverter in terms of THD and switching frequency.

unknown authors

2011-01-01T23:59:59.000Z

158

Field tests of a novel inverter for photovoltaic power conditioning  

SciTech Connect

The Dickerson inverter synthesizes a sinewave current from a photovoltaic array that is segmented into a number of subarrays. These subarrays are switched among the ac phases so that the current from a given subarray is continuous, and each phase is connected at all times to one or more subarrays. The control scheme assures a near-unity power factor current with real-time phase adjustment to power-system disturbances. A prototype inverter was operated into a three-phase power system, with the dc supplied by a photovoltaic array at Sandia National Laboratories. The results of these tests under normal, abnormal and fault conditions are reported. Inversion efficiencies up to 99% were achieved with 0.97 power factor. A simple filter reduced current harmonics from 18% to 5%. The performance for the inverter was projected for a 480-V, three-phase system at the 50-kVA level. An analysis of filtering costs indicates that harmonic reduction to 5% can be achieved at under $0.003 per watt for typical central-station applications. The intended power range for these inverters is 50--250 kVA. The cost to produce the inverter at the 50-kVA level in quantities of 1000 units is estimated to be $0.05 per watt, which is less than the projected cost of other 50-kVA inverters. 22 figs., 9 tabs.

Dickerson, A.; Bower, W.; Schalles, F.

1989-05-01T23:59:59.000Z

159

Improved Superconducting Wire for Wind Generators: Superconducting Wires for Direct-Drive Wind Generators  

SciTech Connect

REACT Project: Brookhaven National Laboratory will develop a low-cost superconducting wire that could be used in high-power wind generators. Superconducting wire currently transports 600 times more electric current than a similarly sized copper wire, but is significantly more expensive. Brookhaven National Laboratory will develop a high-performance superconducting wire that can handle significantly more electrical current, and will demonstrate an advanced manufacturing process that has the potential to yield a several-fold reduction in wire costs while using a using negligible amount of rare earth material. This design has the potential to make a wind turbine generator lighter, more powerful, and more efficient, particularly for offshore applications.

2012-01-01T23:59:59.000Z

160

Lansce Wire Scanning Diagnostics Device Mechanical Design  

SciTech Connect

The Accelerator Operations & Technology Division at Los Alamos National Laboratory operates a linear particle accelerator which utilizes 110 wire scanning diagnostics devices to gain position and intensity information of the proton beam. In the upcoming LANSCE improvements, 51 of these wire scanners are to be replaced with a new design, up-to-date technology and off-the-shelf components. This document outlines the requirements for the mechanical design of the LANSCE wire scanner and presents the recently developed linac wire scanner prototype. Additionally, this document presents the design modifications that have been implemented into the fabrication and assembly of this first linac wire scanner prototype. Also, this document will present the design for the second, third, and fourth wire scanner prototypes being developed. Prototypes 2 and 3 belong to a different section of the particle accelerator and therefore have slightly different design specifications. Prototype 4 is a modification of a previously used wire scanner in our facility. Lastly, the paper concludes with a plan for future work on the wire scanner development.

Rodriguez Esparza, Sergio [Los Alamos National Laboratory; Batygin, Yuri K. [Los Alamos National Laboratory; Gilpatrick, John D. [Los Alamos National Laboratory; Gruchalla, Michael E. [Los Alamos National Laboratory; Maestas, Alfred J. [Los Alamos National Laboratory; Pillai, Chandra [Los Alamos National Laboratory; Raybun, Joseph L. [Los Alamos National Laboratory; Sattler, F. D. [Los Alamos National Laboratory; Sedillo, James Daniel [Los Alamos National Laboratory; Smith, Brian G. [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

LANSCE-R WIRE-SCANNER SYSTEM  

SciTech Connect

The National Instruments cRIO platform is used for the new LANSCE-R wire-scanner systems. All wire-scanner electronics are integrated into a single BiRa BiRIO 4U cRIO chassis specifically designed for the cRIO crate and all interface electronics. The BiRIO chassis, actuator and LabVIEW VIs provide a complete wire-scanner system integrated with EPICS. The new wire-scanner chassis includes an 8-slot cRIO crate with Virtex-5 LX 110 FPGA and Power-PC real-time controller, the LANL-developed cRIO 2-axis wire-sensor analog interface module (AFE), NI9222 cRIO 4-channel 16-bit digitizer, cRIO resolver demodulator, cRIO event receiver, front-panel touch panel display, motor driver, and all necessary software, interface wiring, connectors and ancillary components. This wirescanner system provides a complete, turn-key, 2-axis wire-scanner system including 2-channel low-noise sensewire interface with variable DC wire bias and wireintegrity monitor, 16-bit signal digitizers, actuator motor drive and control, actuator position sensing, limit-switch interfaces, event receiver, LabVIEW and EPICS interface, and both remote operation and full stand-alone operation using the touch panel.

Gruchalla, Michael E. [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

162

Superconducting wire with improved strain characteristics  

DOE Patents (OSTI)

A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improves the strain characteristics of the wire.

Luhman, Thomas (Westhampton Beach, NY); Klamut, Carl J. (E. Patchogue, NY); Suenaga, Masaki (Bellport, NY); Welch, David (Stony Brook, NY)

1982-01-01T23:59:59.000Z

163

Superconducting wire with improved strain characteristics  

DOE Patents (OSTI)

A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improve the strain characteristics of the wire.

Luhman, Thomas (Westhampton Beach, NY); Klamut, Carl J. (East Patchogue, NY); Suenaga, Masaki (Bellport, NY); Welch, David (Stony Brook, NY)

1982-01-01T23:59:59.000Z

164

Superconducting wire with improved strain characteristics  

DOE Patents (OSTI)

A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improve the strain characteristics of the wire.

Luhman, T.; Klamut, C.J.; Suenaga, M.; Welch, D.

1979-12-19T23:59:59.000Z

165

Method of preparing composite superconducting wire  

DOE Patents (OSTI)

An improved method of preparing composite multifilament superconducting wire of Nb.sub.3 Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb.sub.3 Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

Verhoeven, John D. (Ames, IA); Gibson, Edwin D. (Ames, IA); Finnemore, Douglas K. (Ames, IA); Ostenson, Jerome E. (Ames, IA); Schmidt, Frederick A. (Ames, IA); Owen, Charles V. (Ames, IA)

1985-08-06T23:59:59.000Z

166

Improved method of preparing composite superconducting wire  

DOE Patents (OSTI)

An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

Verhoeven, J.D.; Gibson, E.D.; Finnemore, D.K.; Ostenson, J.E.; Schmidt, F.A.; Owen, C.V.

1979-10-17T23:59:59.000Z

167

Improved method of preparing composite superconducting wire  

DOE Patents (OSTI)

An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin is described. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

Verhoeven, J.D.; Gibson, E.D.; Finnemore, D.K.; Ostenson, J.E.; Schmidt, F.A.; Owen, C.V.

1981-04-24T23:59:59.000Z

168

Early expansion in exploding multiple wire arrays  

Science Conference Proceedings (OSTI)

A simple model is developed for the initial stage (blow-off and the onset of pinching) of a multiple exploded wire array. With obvious modifications the model can also be applied to single wires or other self-pinched plasma columns. Each wire in the array is modeled as a plasma cylinder undergoing self-similar radial motion, and the whole array is coupled self-consistently to an external circuit. The plasma expands initially; the onset of self-pinch is shown to be coincident with the plasma conductivity reaching a value large enough for skin effect to occur. The model is run for a variety of system parameters, and the choice of machine and wire parameters to attain particular objectives (e.g., rapid current rise, limited wire expansion, etc.) is discussed.

Bloomberg, H.W.; Lampe, M.; Colombant, D.G.

1980-10-01T23:59:59.000Z

169

Strain tolerant microfilamentary superconducting wire  

DOE Patents (OSTI)

A strain tolerant microfilamentary wire capable of carrying superconducting currents is provided comprising a plurality of discontinuous filaments formed from a high temperature superconducting material. The discontinuous filaments have a length at least several orders of magnitude greater than the filament diameter and are sufficiently strong while in an amorphous state to withstand compaction. A normal metal is interposed between and binds the discontinuous filaments to form a normal metal matrix capable of withstanding heat treatment for converting the filaments to a superconducting state. The geometry of the filaments within the normal metal matrix provides substantial filament-to-filament overlap, and the normal metal is sufficiently thin to allow supercurrent transfer between the overlapped discontinuous filaments but is also sufficiently thick to provide strain relief to the filaments.

Finnemore, Douglas K. (Ames, IA); Miller, Theodore A. (Tuscon, AZ); Ostenson, Jerome E. (Ames, IA); Schwartzkopf, Louis A. (Mankato, MN); Sanders, Steven C. (Ames, IA)

1993-02-23T23:59:59.000Z

170

Bonneville Environmental Foundation | Open Energy Information  

Open Energy Info (EERE)

Foundation Foundation Jump to: navigation, search Name Bonneville Environmental Foundation Address 240 SW 1st Avenue Place Portland, Oregon Zip 97204 Region Pacific Northwest Area Website https://www.b-e-f.org/ Coordinates 45.520495°, -122.671887° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.520495,"lon":-122.671887,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

171

Improvement of Descalability of High Carbon Steel Wire Rods  

Science Conference Proceedings (OSTI)

Presentation Title, Improvement of Descalability of High Carbon Steel Wire Rods ... In the past, hydrochloric and sulfuric acids were used for the purpose of wire ...

172

Material Flow and Texture in Friction Extruded Wire  

Science Conference Proceedings (OSTI)

Presentation Title, Material Flow and Texture in Friction Extruded Wire ... conducted during friction extrusion of AA6061 wire with AA2195 as a marker insert.

173

Reliability of Copper Wire Bonding on Copper Substrate with Tin ...  

Science Conference Proceedings (OSTI)

Suitable bonding conditions, Tin thickness, stage temperature, wire bonding power and bonding time are chosen through wire bonding tests. Peel strength of a ...

174

Transient Melt Pool Response in Wire Feed Electron Beam Direct ...  

Science Conference Proceedings (OSTI)

Presentation Title, Transient Melt Pool Response in Wire Feed Electron Beam Direct ... Abstract Scope, Wire feed electron beam direct digital manufacturing ...

175

Breaking Barriers to Low-Cost Modular Inverter Production & Use  

DOE Green Energy (OSTI)

The goal of this cost share contract is to advance key technologies to reduce size, weight and cost while enhancing performance and reliability of Modular Inverter Product for Distributed Energy Resources (DER). Efforts address technology development to meet technical needs of DER market protection, isolation, reliability, and quality. Program activities build on SatCon Technology Corporation inverter experience (e.g., AIPM, Starsine, PowerGate) for Photovoltaic, Fuel Cell, Energy Storage applications. Efforts focused four technical areas, Capacitors, Cooling, Voltage Sensing and Control of Parallel Inverters. Capacitor efforts developed a hybrid capacitor approach for conditioning SatCon's AIPM unit supply voltages by incorporating several types and sizes to store energy and filter at high, medium and low frequencies while minimizing parasitics (ESR and ESL). Cooling efforts converted the liquid cooled AIPM module to an air-cooled unit using augmented fin, impingement flow cooling. Voltage sensing efforts successfully modified the existing AIPM sensor board to allow several, application dependent configurations and enabling voltage sensor galvanic isolation. Parallel inverter control efforts realized a reliable technique to control individual inverters, connected in a parallel configuration, without a communication link. Individual inverter currents, AC and DC, were balanced in the paralleled modules by introducing a delay to the individual PWM gate pulses. The load current sharing is robust and independent of load types (i.e., linear and nonlinear, resistive and/or inductive). It is a simple yet powerful method for paralleling both individual devices dramatically improves reliability and fault tolerance of parallel inverter power systems. A patent application has been made based on this control technology.

Bogdan Borowy; Leo Casey; Jerry Foshage; Steve Nichols; Jim Perkinson

2005-05-31T23:59:59.000Z

176

Breaking Barriers to Low-Cost Modular Inverter Production & Use  

SciTech Connect

The goal of this cost share contract is to advance key technologies to reduce size, weight and cost while enhancing performance and reliability of Modular Inverter Product for Distributed Energy Resources (DER). Efforts address technology development to meet technical needs of DER market protection, isolation, reliability, and quality. Program activities build on SatCon Technology Corporation inverter experience (e.g., AIPM, Starsine, PowerGate) for Photovoltaic, Fuel Cell, Energy Storage applications. Efforts focused four technical areas, Capacitors, Cooling, Voltage Sensing and Control of Parallel Inverters. Capacitor efforts developed a hybrid capacitor approach for conditioning SatCon's AIPM unit supply voltages by incorporating several types and sizes to store energy and filter at high, medium and low frequencies while minimizing parasitics (ESR and ESL). Cooling efforts converted the liquid cooled AIPM module to an air-cooled unit using augmented fin, impingement flow cooling. Voltage sensing efforts successfully modified the existing AIPM sensor board to allow several, application dependent configurations and enabling voltage sensor galvanic isolation. Parallel inverter control efforts realized a reliable technique to control individual inverters, connected in a parallel configuration, without a communication link. Individual inverter currents, AC and DC, were balanced in the paralleled modules by introducing a delay to the individual PWM gate pulses. The load current sharing is robust and independent of load types (i.e., linear and nonlinear, resistive and/or inductive). It is a simple yet powerful method for paralleling both individual devices dramatically improves reliability and fault tolerance of parallel inverter power systems. A patent application has been made based on this control technology.

Bogdan Borowy; Leo Casey; Jerry Foshage; Steve Nichols; Jim Perkinson

2005-05-31T23:59:59.000Z

177

Sandia National Laboratories: Research: Research Foundations: Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Science Engineering Science The Engineering Science Research Foundation is leading engineering transitions in advanced, highly critical systems by integrating theory development, experimental discovery and diagnostics, modeling, and computational approaches to refine our understanding of complex behavior in engineered systems. Why our work matters Revolutionizing the fundamental understanding of complex engineered systems can lead to enhancements that will bolster our national security stance for decades to come. Our unique value Leading-edge work on physical phenomena at the continuum and near-continuum scale Engineering expertise in national security systems that is second to none Foundational knowledge across multiple disciplines, including solid mechanics, fluid mechanics of reacting and nonreacting systems, structural

178

Efficiency consideration of DC link soft-switching inverters for motor drive applications  

SciTech Connect

This paper critically evaluates efficiency of soft switching inverters including an actively clamped resonant dc link inverter and a clamped-mode resonant pole inverter. An analytical approach to evaluating efficiency of the clamped-mode soft switching inverter has been developed. The evaluation results are compared with that of the standard pulse-width-modulation (PWM) inverter. A 50-kW induction motor is used as the variable load, and the inverter efficiency is evaluated under different speed and torque conditions. The clamped-mode soft-switching inverter, although eliminating the switching loss, shows poor efficiency over the entire load range. Under low load conditions, the efficiency profile is even worse. The actively clamped resonant dc link inverter shows highest efficiency over the entire speed and torque range. However, its energy saving over the standard PWM inverter is marginal under full load or high speed conditions.

Lai, J.S.; Young, R.W.; McKeever, J.W.

1994-12-31T23:59:59.000Z

179

Inverter/controller subsystem optimized for photovoltaic applications  

SciTech Connect

Conversion of solar array dc power to ac power stimulated the specification, design, and simulation testing of an inverter/controller subsystem tailored to the photovoltaic power source characteristics. The optimization of the inverter/controller design as part of an overall Photovoltaic Power System (PPS) designed for maximum energy extraction from the solar array is discussed. The special design requirements for the inverter/controller include: (1) a power system controller (PSC) to control continuously the solar array operating point at the maximum power level based on variable solar insolation and cell temperatures; and (2) an inverter designed for high efficiency at rated load and low losses at light loadings to conserve energy. It must be capable of operating connected to the utility line at a level set by an external controller (PSC). This paper is presented in three sections: (1) the overall PPS and PSC design (Utility Mode); (2) the inverter design and test results; and (3) a PPS analysis and simulation testing, conducted at LeRC to verify the design control concepts and fix design parameters.

Pickrell, R.L.; O' Sullivan, G.; Merrill, W.C.

1978-01-01T23:59:59.000Z

180

American Clean Skies Foundation | Open Energy Information  

Open Energy Info (EERE)

Skies Foundation Skies Foundation Jump to: navigation, search Logo: American Clean Skies Foundation Name American Clean Skies Foundation Address 750 1st Street NE, Suite 1100 Place Washington, DC Zip 20002 Region Northeast - NY NJ CT PA Area Year founded 2007 Phone number (202) 682-6294 Website http://www.cleanskies.org/ Coordinates 38.899704°, -77.007068° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.899704,"lon":-77.007068,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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181

Clean Economy Network Foundation | Open Energy Information  

Open Energy Info (EERE)

Clean Economy Network Foundation Clean Economy Network Foundation Jump to: navigation, search Logo: Clean Economy Network Foundation Name Clean Economy Network Foundation Address 1301 Pennsylvania Ave NW, Suite 700 Place Washington, DC Zip 20004 Number of employees 1-10 Year founded 2009 Website http://cleaneconomynetwork.org Notes Includes what was formerly known as the Renewable Energy Business Network (REBN) Coordinates 38.89597°, -77.030353° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.89597,"lon":-77.030353,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

182

FOUNDATIONS OF PRICING AND INVESTMENT IN  

E-Print Network (OSTI)

FOUNDATIONS OF PRICING AND INVESTMENT IN ELECTRICITY TRANSMISSION A thesis submitted, transmission and distribution areas. From 1984 to 1989 he worked for Chilquinta, an electricity distribution electricity markets. In that frame, open access to the transmission system is one of the fundamental topics

Rudnick, Hugh

183

Foundations and Trends R Information Retrieval  

E-Print Network (OSTI)

Foundations and Trends R in Information Retrieval Vol. 2, No. 3 (2008) 137­213 c 2008 C. Zhai DOI: 10.1561/1500000008 Statistical Language Models for Information Retrieval A Critical Review Cheng@cs.uiuc.edu Abstract Statistical language models have recently been successfully applied to many information retrieval

Zhai, ChengXiang

184

Security Policies as the Foundation for Cryptographic  

E-Print Network (OSTI)

Security Policies as the Foundation for Cryptographic Key Management Elaine Barker, CKMS Project to Layered Security Policies ­ From Information Management to Key Mngt. ­ From Dept. of Com. To NIST Employees · Security Domains ­ Simple to Complex · Key Management ­ Static to Configurable to Dynamic

185

Invert/EE-Lab Website | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Invert/EE-Lab Website Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Invert/EE-Lab Website Focus Area: Renewable Energy Topics: Policy Impacts Website: www.invert.at Equivalent URI: cleanenergysolutions.org/content/invertee-lab-website Language: English Policies: "Deployment Programs,Financial Incentives,Regulations" is not in the list of possible values (Deployment Programs, Financial Incentives, Regulations) for this property. DeploymentPrograms: Project Development Regulations: Mandates/Targets This tool can be used to evaluate support schemes for renewable energy heating and cooling systems. It can help users simulate the effects of promotional programs on the energy carrier mix, CO2 reductions, and costs

186

Illinois Clean Energy Community Foundation Grants | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Illinois Clean Energy Community Foundation Grants Illinois Clean Energy Community Foundation Grants Illinois Clean Energy Community Foundation Grants < Back Eligibility Local Government Nonprofit Schools Savings Category Heating & Cooling Home Weatherization Construction Commercial Weatherization Commercial Heating & Cooling Design & Remodeling Appliances & Electronics Commercial Lighting Lighting Bioenergy Alternative Fuel Vehicles Hydrogen & Fuel Cells Energy Sources Buying & Making Electricity Solar Heating Water Heating Wind Program Info Start Date 06/30/1999 State Illinois Program Type Non-Profit Grant Program Provider Illinois Clean Energy Community Foundation The Illinois Clean Energy Community Foundation (ICECF) was established in December 1999 as an independent foundation with a $225 million endowment

187

Modeling of Ice Accretion on Wires  

Science Conference Proceedings (OSTI)

A time-dependent numerical model of ice accretion on wires, such as overhead conductors, is presented. Simulations of atmospheric icing are made with the model in order to examine the dependence of the accreted ice amount on atmospheric ...

Lasse Makkonen

1984-06-01T23:59:59.000Z

188

Inverter power module with distributed support for direct substrate cooling  

Science Conference Proceedings (OSTI)

Systems and/or methods are provided for an inverter power module with distributed support for direct substrate cooling. An inverter module comprises a power electronic substrate. A first support frame is adapted to house the power electronic substrate and has a first region adapted to allow direct cooling of the power electronic substrate. A gasket is interposed between the power electronic substrate and the first support frame. The gasket is configured to provide a seal between the first region and the power electronic substrate. A second support frame is adapted to house the power electronic substrate and joined to the first support frame to form the seal.

Miller, David Harold (San Pedro, CA); Korich, Mark D. (Chino Hills, CA); Ward, Terence G. (Redondo Beach, CA); Mann, Brooks S. (Redondo Beach, CA)

2012-08-21T23:59:59.000Z

189

SUSTAINABLE CONCRETE FOR WIND TURBINE FOUNDATIONS.  

SciTech Connect

The use of wind power to generate electricity continues to grow, especially given commitments by various countries throughout the world to ensure that a significant percentage of energy comes from renewable sources. In order to meet such objectives, increasingly larger turbines with higher capacity are being developed. The engineering aspects of larger turbine development tend to focus on design and materials for blades and towers. However, foundations are also a critical component of large wind turbines and represent a significant cost of wind energy projects. Ongoing wind research at BNL is examining two areas: (a) structural response analysis of wind turbine-tower-foundation systems and (b) materials engineering of foundations. This work is investigating the dynamic interactions in wind turbine systems, which in turn assists the wind industry in achieving improved reliability and more cost efficient foundation designs. The results reported herein cover initial studies of concrete mix designs for large wind turbine foundations and how these may be tailored to reduce cost and incorporate sustainability and life cycle concepts. The approach taken was to investigate material substitutions so that the environmental, energy and CO{sub 2}-impact of concrete could be reduced. The use of high volumes of ''waste'' materials in concrete was examined. These materials included fly ash, blast furnace slag and recycled concrete aggregate. In addition, the use of steel fiber reinforcement as a means to improve mechanical properties and potentially reduce the amount of bar reinforcement in concrete foundations was studied. Four basic mixes were considered. These were: (1) conventional mix with no material substitutions, (2) 50% replacement of cement with fly ash, (3) 50% replacement of cement with blast furnace slag and (4) 25% replacement of cement with fly ash and 25% replacement with blast furnace slag. Variations on these mixes included the addition of 1% by volume steel fibers. The use of recycled concrete aggregate in the conventional and 50% slag mixes was also studied. Properties investigated included compressive and tensile strengths, elastic modulus, coefficient of permeability, thermal conductivity and durability in seawater and sulfate solutions. It was determined that the mixes containing 50% slag gave the best overall performance. Slag was particularly beneficial for concrete that used recycled aggregate and could reduce strength losses. Initial durability results indicated that corrosion of fibers in the different concrete mixes when exposed to seawater was minimal. Future research needs to include more detailed studies of mix design and properties of concrete for wind turbine foundations. Emphasis on slag-modified mixes with natural and recycled concrete aggregate is recommended. The proportion of slag that can be incorporated in the concrete needs to be optimized, as does the grading of recycled aggregate. The potential for using silica fume in conjunction with slag is worth exploring as this may further enhance strength and durability. Longer-term durability studies are necessary and other pertinent properties of concrete that require investigation include damping characteristics, pullout strength, fatigue strength and risk of thermal cracking. The properties of sustainable concrete mixes need to be integrated with studies on the structural behavior of wind turbine foundations in order to determine the optimal mix design and to examine means of reducing conservatism and cost of foundations.

BERNDT,M.L.

2004-06-01T23:59:59.000Z

190

Phase Conductor and Shield Wire Corrosion  

Science Conference Proceedings (OSTI)

As new inspection technologies for conductors and shield wires develop and mature, the assessment process becomes more accurate in identifying and quantifying flaws. With better accuracy, condition assessment can be less conservative, thus allowing utilities to save money by keeping conductors in service for longer periods. This report, which includes the results of a survey of EPRI member utilities on phase conductor and shield wire installations, inspections, and failures, updates recent EPRI work on c...

2007-12-20T23:59:59.000Z

191

Power Quality Improvement Methodology for Wires Companies  

Science Conference Proceedings (OSTI)

This report provides practical utility-side strategies for improving power quality. Much research has been done on the application of custom power devices to mitigate power quality events on transmission and distribution wires systems. However, these solutions can be costly and often benefit a limited number of customers. Many wires companies are looking for ways to improve the overall quality of their service using methods and equipment that are more traditional.

2003-02-11T23:59:59.000Z

192

Energetic additive manufacturing process with feed wire  

DOE Patents (OSTI)

A process for additive manufacture by energetic wire deposition is described. A source wire is fed into a energy beam generated melt-pool on a growth surface as the melt-pool moves over the growth surface. This process enables the rapid prototyping and manufacture of fully dense, near-net shape components, as well as cladding and welding processes. Alloys, graded materials, and other inhomogeneous materials can be grown using this process.

Harwell, Lane D. (Albuquerque, NM); Griffith, Michelle L. (Albuquerque, NM); Greene, Donald L. (Corrales, NM); Pressly, Gary A. (Sandia Park, NM)

2000-11-07T23:59:59.000Z

193

Pulsed electromagnetic acceleration of exploded wire plasmas  

Science Conference Proceedings (OSTI)

A simple analysis of the dynamic state of a current-conducting high-density plasma column, resulting from an exploded wire between the conductors of a rail-gun accelerator or one or more wires strung between the anode and cathode conductors in a pulsed-power generator diode, is given on the basis of a one-dimensional magnetohydrodynamics model. Spatial distributions of the current density, magnetic field, temperature, and particle density are calculated as well as the temporal current, voltage, and impedance histories. The model self-consistently treats the accelerator load transition through its solid, melt, vapor, and plasma states in the presence of its supply source and feed network. Once formed and accelerated, the plasma state calculations show expansion cooling across the self-induced magnetic field if the Bennett condition is not satisfied. The model predictions are compared to two experimental situations. The first involves the delivery of some hundreds of Joules of stored energy to the wire load. For this case, good agreement between the calculated and observed plasma state is obtained. The second situation involves the delivery of many thousands of Joules to the wire load. For this case and dependent upon the wire mass, diameter, number of wires exploded, their separation, and the pulsed energy electrical wave shapes, the magnetohydrodynamic results can be qualitatively incorrect. The necessity of an electromagnetic particle simulation approach is indicated in order to resolve the magnetic rope-like structure and filamentation observed in the very energetic plasmas.

Peratt, A.L.; Koert, P.

1983-11-01T23:59:59.000Z

194

Chemistry of radiation damage to wire chambers  

SciTech Connect

Proportional counters are used to study aspects of radiation damage to wire chambers (wire aging). Principles of low-pressure, rf plasma chemistry are used to predict the plasma chemistry in electron avalanches (1 atm, dc). (1) Aging is studied in CF{sub 4}/iC{sub 4}H{sub 10} gas mixtures. Wire deposits are analyzed by Auger electron spectroscopy. An apparent cathode aging process resulting in loss of gain rather than in a self-sustained current is observed in CF{sub 4}-rich gases. A four-part model considering plasma polymerization of the hydrocarbon, etching of wire deposits by CF{sub 4}, acceleration of deposition processes in strongly etching environments, and reactivity of the wire surface is developed to understand anode wire aging in CF{sub 4}/iC{sub 4}H{sub 10} gases. Practical guidelines suggested by the model are discussed. (2) Data are presented to suggest that trace amounts of Freons do not affect aging rates in either dimethyl ether or Ar/C{sub 2}H{sub 6}. Apparent loss of gain is explained by attachment of primary electrons to a continuously increasing concentration of Freon 11 (CCl{sub 3}F) in the counter gas. An increase in the concentration of Freon 11 in dimethyl ether is caused by a distillation process in the gas supply bottle and is a natural consequence of the unequal volatilities of the two compounds.

Wise, J.

1992-08-01T23:59:59.000Z

195

United Nations Foundation Feed | Open Energy Information  

Open Energy Info (EERE)

Feed Feed Jump to: navigation, search Home | About | Inventory | Partnerships | Capacity Building | Webinars | Reports | Events | News | List Serve CLEAN Member Feeds Center for Environment and National Security at Scripps Centro de EnergĂ­as Renovables (CER) The Children's Investment Fund Foundation (CIFF) Climate and Development Knowledge Network (CDKN) Climate Technology Initiative (CTI) ClimateWorks Foundation Coalition for Rainforest Nations (CfRN) Ecofys Energy Research Centre of the Netherlands (ECN) Energy Sector Management Assistance Program of the World Bank (ESMAP) Environment and Development Action in the Third World (ENDA-TM) German Aerospace Center (DLR) German Agency for International Cooperation (GIZ) Global Village Energy Partnership (GVEP) Information for Development Program (infoDev)

196

Expert Meeting Report: Foundations Research Results  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Foundations Research Results Foundations Research Results C. Ojczyk, P. Huelman, and J. Carmody NorthernSTAR May 2013 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, subcontractors, or affiliated partners makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement,

197

CleanTX Foundation | Open Energy Information  

Open Energy Info (EERE)

CleanTX Foundation CleanTX Foundation Address 3925 W Braker Lane Place Austin, Texas Zip 78759 Region Texas Area Notes Promotes entrepreneurship in the field of clean technology, by providing educational forums, content, awareness and networking opportunities Website http://cleantx.org/ Coordinates 30.396989°, -97.735768° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":30.396989,"lon":-97.735768,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

198

Radiation Damping of Shallow Foundations on Nonlinear Soil Medium  

E-Print Network (OSTI)

to the reduction of radiation damping due to soil yielding.since the reduced radiation damping at foundation level will2007 Paper No. 1150 RADIATION DAMPING OF SHALLOW FOUNDATIONS

Zhang, Jian; Tang, Yuchuan

2007-01-01T23:59:59.000Z

199

Efficiency modeling and evaluation of a resonant snubber based soft- switching inverter for motor drive applications  

SciTech Connect

This paper establishes an analytical model for a resonant snubber based soft-switching inverter. The model adopts loss separation method to evaluate losses in individual components. Because of symmetry of the inverter circuit, the developed model is suitable for both single-phase and three-phase inverters. A single-phase inverter was built and tested with a single-phase induction motor driving a fan load to verify the developed model. The equivalent single-phase induction motor model was curve-fitted from experiment. Analytical results showed reasonable agreement with experiment. The same efficiency evaluation method was then applied to the conventional hard-switching inverter, and the results were compared with that of the soft-switching inverter. The resonant snubber base soft-switching inverter shows substantial efficiency improvement over the hard switching PWM (pulse-width-modulation) inverter, especially in low speed operation.

Lai, J.S.; Young, R.W.; Ott, G.W.

1995-12-31T23:59:59.000Z

200

A multilevel voltage-source inverter with separate dc sources for static var generation  

SciTech Connect

A new multilevel voltage-source inverter with a separate dc sources is proposed for high-voltage, high-power applications, such as flexible ac transmission systems (FACTS) including static var generation (SVG), power line conditioning, series compensation, phase shifting, voltage balancing, fuel cell and photovoltaic utility systems interfacing, etc. The new M-level inverter consists of (M-1)/2 single phase full bridges in which each bridge has its own separate dc source. This inverter can generate almost sinusoidal waveform voltage with only one time switching per cycle as the number of levels increases. It can solve the problems of conventional transformer-based multipulse inverters and the problems of the multilevel diode-clamped inverter and the multilevel flying capacitor inverter. To demonstrate the superiority of the new inverter, a SVG system using the new inverter topology is discussed through analysis, simulation and experiment.

Peng, Fang Zheng [Tennessee Univ., Knoxville, TN (United States)]|[Oak Ridge National Lab., TN (United States); Lai, Jih-Sheng; McKeever, J.; VanCoevering, J. [Oak Ridge National Lab., TN (United States)

1995-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Acoustical Measurement of Nonlinear Internal Waves Using the Inverted Echo Sounder  

Science Conference Proceedings (OSTI)

The performance of pressure sensor–equipped inverted echo sounders for monitoring nonlinear internal waves is examined. The inverted echo sounder measures the round-trip acoustic travel time from the sea floor to the sea surface and thus acquires ...

Qiang Li; David M. Farmer; Timothy F. Duda; Steve Ramp

2009-10-01T23:59:59.000Z

202

Excavationless Exterior Foundation Insulation Exploratory Study  

Science Conference Proceedings (OSTI)

The key objective of this exploratory study was to investigate the feasibility of the development or adoption of technologies that would enable a large percentage of existing homes in cold climates to apply a combination 'excavationless' soil removal process with appropriate insulation and water management on the exterior of existing foundations at a low cost. Our approach was to explore existing excavation and material technologies and systems to discover whether potential successful combinations existed.

Mosiman, G.; Wagner, R.; Schirber, T.

2013-02-01T23:59:59.000Z

203

Dylan Jones, President & CEO Canada West Foundation  

E-Print Network (OSTI)

's Crude Oil and North American Demand in 2011 Source: CAPP, EIA, Statistics Canada #12;US oil production and overseas crude oil prices. Sources: US EIA, CERI, Canada West Foundation. 0 20 40 60 80 100 120 140 160 Jul-07 Jan-08 Jul-08 Jan-09 Jul-09 Jan-10 Jul-10 Jan-11 Jul-11 Jan-12 Jul-12 US$/b Crude Oil Benchmark

Peak, Derek

204

Environmental and Corrosion Effects on Reinforced Concrete Foundations  

Science Conference Proceedings (OSTI)

The large number of transmission structures with concrete foundations that the electric industry maintains makes it important to develop efficient ways to monitor their condition and remediate damage, especially since the largest population of concrete foundations is 20-40 years old; and almost 40 of foundations are more than 40 years old. This report discusses the environmental and corrosion effects that affect steel-reinforced concrete foundations, including problems caused by poor construction, freezi...

2011-12-22T23:59:59.000Z

205

High voltage power supply with modular series resonant inverters  

DOE Patents (OSTI)

A relatively small and compact high voltage, high current power supply for a laser utilizes a plurality of modules containing series resonant half bridge inverters. A pair of reverse conducting thyristors are incorporated in each series resonant inverter module such that the series resonant inverter modules are sequentially activated in phases 360.degree./n apart, where n=number of modules for n>2. Selective activation of the modules allows precise output control reducing ripple and improving efficiency. Each series resonant half bridge inverter module includes a transformer which has a cooling manifold for actively circulating a coolant such as water, to cool the transformer core as well as selected circuit elements. Conductors connecting and forming various circuit components comprise hollow, electrically conductive tubes such as copper. Coolant circulates through the tubes to remove heat. The conductive tubes act as electrically conductive lines for connecting various components of the power supply. Where it is desired to make electrical isolation breaks, tubes comprised of insulating material such as nylon are used to provide insulation and continue the fluid circuit.

Dreifuerst, Gary R. (Livermore, CA); Merritt, Bernard T. (Livermore, CA)

1995-01-01T23:59:59.000Z

206

High voltage power supply with modular series resonant inverters  

DOE Patents (OSTI)

A relatively small and compact high voltage, high current power supply for a laser utilizes a plurality of modules containing series resonant half bridge inverters. A pair of reverse conducting thyristors are incorporated in each series resonant inverter module such that the series resonant inverter modules are sequentially activated in phases 360{degree}/n apart, where n=number of modules for n>2. Selective activation of the modules allows precise output control reducing ripple and improving efficiency. Each series resonant half bridge inverter module includes a transformer which has a cooling manifold for actively circulating a coolant such as water, to cool the transformer core as well as selected circuit elements. Conductors connecting and forming various circuit components comprise hollow, electrically conductive tubes such as copper. Coolant circulates through the tubes to remove heat. The conductive tubes act as electrically conductive lines for connecting various components of the power supply. Where it is desired to make electrical isolation breaks, tubes comprised of insulating material such as nylon are used to provide insulation and continue the fluid circuit. 11 figs.

Dreifuerst, G.R.; Merritt, B.T.

1995-07-18T23:59:59.000Z

207

Modelling and Control of an Inverted Pendulum Turbine  

E-Print Network (OSTI)

. In this project the feasibility of a new kind of wind turbine is studied. This thesis deals with the achievement of getting a proper mathematical model of a new kind of wind turbine, called the inverted pendulum turbine is inherently unstable system. In order to control this wind turbine an optimal control has been investigated

208

Review of PV Inverter Technology Cost and Performance Projections  

DOE Green Energy (OSTI)

The National Renewable Energy Laboratory (NREL) has a major responsibility in the implementation of the U.S. Department of Energy's (DOE's) Solar Energy Technologies Program. Sandia National Laboratories (SNL) has a major role in supporting inverter development, characterization, standards, certifications, and verifications. The Solar Energy Technologies Program recently published a Multiyear Technical Plan, which establishes a goal of reducing the Levelized Energy Cost (LEC) for photovoltaic (PV) systems to $0.06/kWh by 2020. The Multiyear Technical Plan estimates that, in order to meet the PV system goal, PV inverter prices will need to decline to $0.25-0.30 Wp by 2020. DOE determined the need to conduct a rigorous review of the PV Program's technical and economic targets, including the target set for PV inverters. NREL requested that Navigant Consulting Inc.(NCI) conduct a review of historical and projected cost and performance improvements for PV inverters, including identification of critical barriers identified and the approaches government might use to address them.

Navigant Consulting Inc.

2006-01-01T23:59:59.000Z

209

Modeling the Overshooting Effect for CMOS Inverter in Nanometer Technologies  

Science Conference Proceedings (OSTI)

With the scaling of CMOS technology, the over-shooting time due to the input-to-output coupling capacitance has much more significant effect on inverter delay. Moreover, the overshooting time is also an important parameter in the short circuit power ...

Zhangcai Huang; Hong Yu; Atsushi Kurokawa; Yasuaki Inoue

2007-01-01T23:59:59.000Z

210

Mono inverter Multi parallel PMSM -Structure and Control strategy  

E-Print Network (OSTI)

a new and original Mono inverter Multi parallel Permanent Magnet Synchronous Motor (PMSM) system. To obtain the stability of such a system, each of the motor synchronisms should always be respected regardless of their load torque. In this case, only one motor, called "master motor", will be self

Paris-Sud XI, Université de

211

Review of PV Inverter Technology Cost and Performance Projections  

SciTech Connect

The National Renewable Energy Laboratory (NREL) has a major responsibility in the implementation of the U.S. Department of Energy's (DOE's) Solar Energy Technologies Program. Sandia National Laboratories (SNL) has a major role in supporting inverter development, characterization, standards, certifications, and verifications. The Solar Energy Technologies Program recently published a Multiyear Technical Plan, which establishes a goal of reducing the Levelized Energy Cost (LEC) for photovoltaic (PV) systems to $0.06/kWh by 2020. The Multiyear Technical Plan estimates that, in order to meet the PV system goal, PV inverter prices will need to decline to $0.25-0.30 Wp by 2020. DOE determined the need to conduct a rigorous review of the PV Program's technical and economic targets, including the target set for PV inverters. NREL requested that Navigant Consulting Inc.(NCI) conduct a review of historical and projected cost and performance improvements for PV inverters, including identification of critical barriers identified and the approaches government might use to address them.

Navigant Consulting Inc.

2006-01-01T23:59:59.000Z

212

Calibrating Inverted Echo Sounders Equipped with Pressure Sensors  

Science Conference Proceedings (OSTI)

The addition of an accurate pressure sensor to the inverted echo sounder (IES) has allowed for the development of a new method for calibrating the IES’s acoustic travel-time record without the need for coincident conductivity–temperature–depth (...

Christopher S. Meinen; D. Randolph Watts

1998-12-01T23:59:59.000Z

213

An Autonomously Recording Inverted Echo Sounder: ARIES II  

Science Conference Proceedings (OSTI)

A self-contained instrument, the Autonomously Recording Inverted Echo Sounder (ARIES II), carrying two 250-kHz beam side-scan sonars and with the capacity to record sonar data sampled at 3.2 kHz for 168 h with the sonars operating with a pulse ...

S. A. Thorpe; M. J. Ulloa; D. Baldwin; A. J. Hall

1998-12-01T23:59:59.000Z

214

Nonlinear Control Techniques in Uninterruptible Power Supply Inverter: A Review  

Science Conference Proceedings (OSTI)

Summarizes the basic objectives of controllers for UPS system are tracking ability and robustness. To get this aims, many controllers have been proposed in the literature. In this paper a comprehensive review of the nonlinear control techniques of UPS ... Keywords: inverter, uninterruptible power supply, control techniques

Ghazanfar Shahgholian; Jawad Faiz; Pegah Shafaghi

2009-12-01T23:59:59.000Z

215

Optimized Triple-Junction Solar Cells Using Inverted Metamorphic Approach (Presentation)  

DOE Green Energy (OSTI)

Record efficiencies with triple-junction inverted metamorphic designs, modeling useful to optimize, and consider operating conditions before choosing design.

Geisz, J. F.

2008-11-01T23:59:59.000Z

216

TEXAS A&M RESEARCH FOUNDATION EMAIL & FAX APPROVAL AUTHORIZATION  

E-Print Network (OSTI)

10-22-09 TEXAS A&M RESEARCH FOUNDATION EMAIL & FAX APPROVAL AUTHORIZATION This form serves as authorization for the Texas A&M Research Foundation to accept approvals for invoices and project payroll expenses by email or fax. I understand that by using this process the Texas A&M Research Foundation

217

TEXAS A&M RESEARCH FOUNDATION FAX & EMAIL APPROVAL AUTHORIZATION  

E-Print Network (OSTI)

TEXAS A&M RESEARCH FOUNDATION FAX & EMAIL APPROVAL AUTHORIZATION This form serves as authorization for the Texas A&M Research Foundation to accept approvals by fax or email for invoices, travel, and/or payroll expenses. I understand that by using this method, the Texas A&M Research Foundation will process payments

218

Synchronization and power sharing for droop-controlled inverters in islanded microgrids  

Science Conference Proceedings (OSTI)

Motivated by the recent and growing interest in smart grid technology, we study the operation of DC/AC inverters in an inductive microgrid. We show that a network of loads and DC/AC inverters equipped with power-frequency droop controllers can be cast ... Keywords: Coupled oscillators, Distributed control, Inverters, Kuramoto model, Power-system control, Smart power applications, Synchronization

John W. Simpson-Porco, Florian DöRfler, Francesco Bullo

2013-09-01T23:59:59.000Z

219

Electrical power inverter having a phase modulated, twin-inverter, high frequency link and an energy storage module  

SciTech Connect

The present invention provides an electrical power inverter method and apparatus, which includes a high frequency link, for converting DC power into AC power. Generally stated, the apparatus includes a first high frequency module which produces an AC voltage at a first output frequency, and a second high frequency inverter module which produces an AC voltage at a second output frequency that is substantially the same as the first output frequency. The second AC voltage is out of phase with the first AC voltage by a selected angular phase displacement. A mixer mixes the first and second output voltages to produce a high frequency carrier which has a selected base frequency impressed on the sidebands thereof. A rectifier rectifies the carrier, and a filter filters the rectified carrier. An output inverter inverts the filtered carrier to produce an AC line voltage at the selected base frequency. A phase modulator adjusts the relative angular phase displacement between the outputs of the first and second high frequency modules to control the base frequency and magnitude of the AC line voltage.

Pitel, Ira J. (Whippany, NJ)

1987-02-03T23:59:59.000Z

220

Electrical power inverter having a phase modulated, twin-inverter, high frequency link and an energy storage module  

SciTech Connect

The present invention provides an electrical power inverter method and apparatus, which includes a high frequency link, for converting DC power into AC power. Generally stated, the apparatus includes a first high frequency module which produces an AC voltage at a first output frequency, and a second high frequency inverter module which produces an AC voltage at a second output frequency that is substantially the same as the first output frequency. The second AC voltage is out of phase with the first AC voltage by a selected angular phase displacement. A mixer mixes the first and second output voltages to produce a high frequency carrier which has a selected base frequency impressed on the sidebands thereof. A rectifier rectifies the carrier, and a filter filters the rectified carrier. An output inverter inverts the filtered carrier to produce an AC line voltage at the selected base frequency. A phase modulator adjusts the relative angular phase displacement between the outputs of the first and second high frequency modules to control the base frequency and magnitude of the AC line voltage. 19 figs.

Pitel, I.J.

1987-02-03T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Ground resistance of concrete foundations in substation yards  

SciTech Connect

The reinforced concrete foundations in a substation yard have extensive reinforcing steel which is in metallic connection with the laid ground conductor. The foundations may contribute significantly to the dissipation of the fault and leakage currents. Simple to use equations and graphs are presented in this paper to determine the ground resistance of various types of foundations encountered in substation yards. The validity of the analytical approach has been verified with scale model tests. The ground resistance of the foundations estimated as suggested in the paper can be used to evaluate the role of the foundations as grounding element.

Thapar, B.; Ferrer, O. (Montana State Univ., Bozeman, MT (USA)); Blank, D.A. (Bonneville Power Administration, Portland, OR (USA))

1990-01-01T23:59:59.000Z

222

Towards Ontological Foundations for Agent Modeling Concepts using  

E-Print Network (OSTI)

Abstract: Foundational ontologies provide the basic concepts upon which any domain-specific ontology is built. This paper presents a new foundational ontology, UFO, and shows how it can be used as a foundation of agent concepts and for evaluating agent-oriented modeling methods. UFO is derived from a synthesis of two other foundational ontologies, GFO/GOL and OntoClean/DOLCE. While their main areas of application are the natural sciences and linguistics/cognitive engineering, respectively, the main purpose of UFO is to provide a foundation for conceptual modeling, including agentoriented modeling. 1

Giancarlo Guizzardi; Gerd Wagner

2005-01-01T23:59:59.000Z

223

Method of fabricating composite superconducting wire  

DOE Patents (OSTI)

An improvement in the method for preparing composite rods of superconducting alloy and normal metal from which multifilament composite superconducting wire is fabricated by bending longitudinally a strip of normal metal around a rod of superconductor alloy and welding the edges to form the composite rod. After the rods have preferably been provided with a hexagonal cross-sectional shape, a plurality of the rods are stacked into a normal metal extrusion can, sealed and worked to reduce the cross-sectional size and form multifilament wire. Diffusion barriers and high-electrical resistance barriers can easily be introduced into the wire by plating or otherwise coating the faces of the normal metal strip with appropriate materials.

Strauss, Bruce P. (Downers Grove, IL); Reardon, Paul J. (Princeton, NJ); Remsbottom, Robert H. (Middleton, WI)

1977-01-01T23:59:59.000Z

224

Impact of inverter station on torsional dynamics of parallel HVdc-ac power system  

SciTech Connect

This paper investigates the impact of an inverter station on the torsional dynamics of a turbine-generator set which is located at the rectifier side of a parallel HVdc-ac power system. The studies show that depending on the stiffness of the inverter ac bus and electrical coupling between the inverter and rectifier ac buses, the inverter closed loop control can have noticeable contribution to the instability of torsional dynamics. This adverse torsional impact is observed in the study results even when the inverter ac bus is fairly strong (ESCR larger than 5.0).

Iravani, M.R.; Zhao, Z.; Hamouda, R.M. (Univ. of Toronto, Ontario (Canada). Dept. of Electrical Engineering)

1993-08-01T23:59:59.000Z

225

Sandia National Laboratories: Research: Research Foundations: Nanodevices  

NLE Websites -- All DOE Office Websites (Extended Search)

Nanodevices and Microsystems Nanodevices and Microsystems Microsystems-enabled photovoltaics, also known as solar glitter To enable new and increasingly powerful macrosystem capabilities for critical national systems, the Nanodevices and Microsystems Research Foundation works to increase understanding of physical phenomena across the quantum- to microscale continuum, create novel nano- and microscale devices, achieve new methods of integration, and realize novel microsystems-based complex systems. Why our work matters Microelectronic circuits have a strong history of dramatically improving the performance, functionality, and reliability of national security platforms. Adding microscale sensors, photonics, and micro-electro-mechanical systems (MEMS) to such platforms enables even further improvements to ensure a more robust national security profile.

226

Measure Guideline: Hybrid Foundation Insulation Retrofits  

Science Conference Proceedings (OSTI)

This measure guideline provides recommendations for designs and variations for retrofit hybrid assemblies in improving interior foundation insulation and water management of basements. Variations include closed cell spray foam (ccSPF) with membrane waterproofing or air gap membrane drainage layers, rigid board foam insulation at flat walls (cast concrete or CMU block), a 'partial drainage' detail making use of the bulk water drainage that occurs through the field of a rubble stone wall, and non-drained spray foam assemblies (including slab insulation).

Ueno, K.; Lstiburek, J.

2012-05-01T23:59:59.000Z

227

LANSCE Wire Scanner System Prototype: Switchyard Test  

Science Conference Proceedings (OSTI)

On November 19, 2011, the beam diagnostics team of Los Alamos National Laboratory's LANSCE accelerator facility conducted a test of a prototype wire scanner system for future deployment within the accelerator's switchyard area. The primary focus of this test was to demonstrate the wire scanner control system's ability to extend its functionality beyond acquiring lower energy linac beam profile measurements to acquiring data in the switchyard. This study summarizes the features and performance characteristics of the electronic and mechanical implementation of this system with details focusing on the test results.

Sedillo, James D [Los Alamos National Laboratory

2012-04-11T23:59:59.000Z

228

GAP analysis towards a design qualification standard development for grid-connected photovoltaic inverters.  

SciTech Connect

A dedicated design qualification standard for PV inverters does not exist. Development of a well-accepted design qualification standard, specifically for PV inverters will significantly improve the reliability and performance of inverters. The existing standards for PV inverters such as ANSI/UL 1741 and IEC 62109-1 primarily focus on safety of PV inverters. The IEC 62093 discusses inverter qualification but it includes all the BOS components. There are other general standards for distributed generators including the IEEE 1547 series of standards which cover major concerns like utility integration but they are not dedicated to PV inverters and are not written from a design qualification point of view. In this paper some of the potential requirements for a design qualification standard for PV inverters are addressed. The missing links in existing PV inverter related standards are identified and with the IEC 62093 as a guideline, the possible inclusions in the framework for a dedicated design qualification standard of PV inverter are discussed. Some of the key missing links are related to electric stress tests. Hence, a method to adapt the existing surge withstand test standards for use in design qualification standard of PV inverter is presented.

Tamizhmani, Govindasamy (Arizona State University, Tempe, AZ); Granata, Jennifer E.; Maracas, George (Arizona State University, Tempe, AZ); Ayyanar, Raja (Arizona State University, Tempe, AZ); Marinella, Matthew; Venkataramanan, Sai Balasubramanian Alampoondi (Arizona State University, Tempe, AZ)

2011-06-01T23:59:59.000Z

229

Dynamic performance and control of a static var generator using cascade multilevel inverters  

SciTech Connect

A cascade multilevel inverter is proposed for static VAR shifting, compensation/generation applications. The new cascade M-level inverter consists of (M-1)/2 single-phase full bridges in which each bridge has its own separate dc source. This inverter can generate almost sinusoidal waveform voltage with only one time switching per cycle. It can eliminate the need for transformers in multipulse inverters. A prototype static VAR generator (SVG) system using 11- level cascade inverter (21-level line-to-line voltage waveform) has been built. The output voltage waveform is equivalent to that of a 60- pulse inverter. This paper focuses on dynamic performance of the cascade inverter based SVG system. Control schemes are proposed to achieve a fast response which is impossible for a conventional static VAR compensator (SVC). Analytical, simulated and experimental results show the superiority of the proposed SVG system.

Peng, Fang Zheng [Tennessee Univ., Knoxville, TN (United States); Lai, Jih-Sheng [Oak Ridge National Lab., TN (United States)

1996-10-01T23:59:59.000Z

230

PWM Inverter control and the application thereof within electric vehicles  

DOE Patents (OSTI)

An inverter (34) which provides power to an A.C. machine (28) is controlled by a circuit (36) employing PWM control strategy whereby A.C. power is supplied to the machine at a preselectable frequency and preselectable voltage. This is accomplished by the technique of waveform notching in which the shapes of the notches are varied to determine the average energy content of the overall waveform. Through this arrangement, the operational efficiency of the A.C. machine is optimized. The control circuit includes a micro-computer and memory element which receive various parametric inputs and calculate optimized machine control data signals therefrom. The control data is asynchronously loaded into the inverter through an intermediate buffer (38). In its preferred embodiment, the present invention is incorporated within an electric vehicle (10) employing a 144 VDC battery pack (32) and a three-phase induction motor (18).

Geppert, Steven (Bloomfield Hills, MI)

1982-01-01T23:59:59.000Z

231

Cold climate foundation insulation retrofit performance  

SciTech Connect

The effectiveness of foundation insulation retrofits in 15 Minnesota houses was evaluated using a before-after experimental method. Nine houses received interior retrofits; six, exterior retrofits. Foundation air leaks were sealed before the preretrofit heating season to control for inadvertent sealing during retrofit. Basement heating supply and return registers were closed in most houses for the 21-month monitoring period, and for all houses the basement was an uncontrolled zone without a thermostat. Homeowners recorded gas and electricity meter readings and furnace and water heater on-times weekly. A load vs. outdoor temperature was used to evaluate changes in energy use. The average whole-house energy savings for the interior and exterior cases were 92 and 24 therm per year, or 7.9% (range - 0.6% to 17.8%) and 3.0% (range -2.9% to 8.3%), respectively. Minimum payback periods for the interior and exterior cases were 12 and 37 years, respectively. For all houses the basement temperature increased between the pre- and post-retrofit periods, and all homeowners reported increased comfort in their basements. Average measured savings were about one-third of those predicted. The results show that the application of insulation in an uncontrolled zone produces highly variable results and has the principal effect of increasing the temperature and comfort of the basement rather than producing cost-effective whole-house energy savings.

Robinson, D.A. (Robinson Technical Services, St. Paul, MN (US)); Goldberg, L.F.; Shen, L.S. (Univ. of Minnesota, Minneapolis, MN (US)); Nelson, G.D. (Energy Conservatory, Minneapolis, MN (US)); Hewett, M.J. (Center for Energy and the Urban Environment, Minneapolis, MN (US)); Noble, M.T. (Natural Resources Corp., Minneapolis, MN (US))

1990-01-01T23:59:59.000Z

232

Seismic Qualification Case Study for a New Inverter  

Science Conference Proceedings (OSTI)

This report reviews and compares methods used for the seismic qualification of safety related equipment at nuclear power plants and examines an alternative, hybrid approach. The report investigates the costs and lead times for each seismic qualification approach and also discusses the seismic capacity definitions that result from the application of each qualification approach. The report includes a case study that applies the new approach to the seismic qualification of an inverter.

2007-12-17T23:59:59.000Z

233

Conventional and fuzzy PI control of voltage-source inverter-fed induction motor drive for electric vehicle  

Science Conference Proceedings (OSTI)

Keywords: adaptive control, control algorithm, electric vehicle, fuzzy control, inverter drive system

Tadeusz Stefanski

1995-12-01T23:59:59.000Z

234

Xcel Energy - Farm Re-Wiring Loan Program (Wisconsin) | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Re-Wiring Loan Program (Wisconsin) Xcel Energy - Farm Re-Wiring Loan Program (Wisconsin) Eligibility Agricultural Savings For Other Maximum Rebate 23,000 loan maximum Can be...

235

Media Center - Argonne Partners with Delphi on Inverter  

NLE Websites -- All DOE Office Websites (Extended Search)

Argonne part of Delphi-led team to reduce cost, size of hybrid vehicle component Argonne part of Delphi-led team to reduce cost, size of hybrid vehicle component Argonne is part of a Delphi Corp.-led team that has been selected by the U.S. Department of Energy to develop the next-generation propulsion inverter for hybrid vehicles, according to an announcement by Delphi earlier this week. The project is valued at $8 million, with DOE providing $5 million and the Delphi team contributing $3 million. The team's aim is to reduce the size and cost of the inverter for electric propulsion systems by 50 percent or more. Propulsion invertors supply phased alternating current power for hybrid traction motors and generators, and enable exact control of electrical power flow from the battery to the electric motor. The small inverter would cost less and be used in the next-generation high-efficiency hybrid electric and plug-in hybrids vehicles, as well as in fuel cell-powered vehicles in the longer-term.

236

Magnet Wire Plant Resolves PQ Issues  

Science Conference Proceedings (OSTI)

This case study presents an example of a magnet wire plant that was subject to a number of power quality (PQ) disturbances. These disturbances were severe enough to upset several manufacturing lines. A detailed audit revealed that the plant could be hardened to PQ disturbances using simple-to-implement, low-cost techniques.

2007-12-31T23:59:59.000Z

237

Porous coatings from wire mesh for bone implants  

DOE Patents (OSTI)

A method of coating areas of bone implant elements and the resulting implant having a porous coating are described. Preselected surface areas are covered by a preform made from continuous woven lengths of wire. The preform is compressed and heated to assure that diffusion bonding occurs between the wire surfaces and between the surface boundaries of the implant element and the wire surfaces in contact with it. Porosity is achieved by control of the resulting voids between the bonded wire portions.

Sump, Kenneth R. (Richland, WA)

1986-01-01T23:59:59.000Z

238

Nuclear Maintenance Applications Center: Wire Brush and Alternatives Selection Matrix  

Science Conference Proceedings (OSTI)

The purpose of this product is to provide maintenance personnel guidance regarding the suitability of various non-wire filament brush products for different applications in the plant. The objective of the Wire Brush and Alternatives Selection Matrix is to provide recommendations and encourage the use of products in lieu of wire brushes. The recommendations in the matrix were developed based on the testing described EPRI report 1022273, Wire Brush Testing, Procurement and Usage Guide, and recommendations ...

2010-12-23T23:59:59.000Z

239

Transient Melt Pool Response in Wire Feed Additive Manufacturing ...  

Science Conference Proceedings (OSTI)

Symposium, Advanced Materials, Processes and Applications for Additive Manufacturing ... Lubricants in Deposition and Machining of Wire and Arc Additive ...

240

Development program for 3. 0 kW inverter. Militarized inverter for use with fuel cell or battery power plants. Final report, December 1976--December 1978  

SciTech Connect

This report describes the design, construction and testing of a static inverter rated at 3.0 kilowatts. Circuit techniques were evaluated to obtain desired results with considerations to cost, reliability, maintainability, weight, size and efficiency. The application of this portable, rugged inverter is to replace mechanical alternating generators used in the field.

Rance, J.E.

1979-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Grid Impacts of Distributed Generation with Advanced Inverter Functions: Hosting Capacity of Large-Scale Solar Photovoltaic Using Smart Inverters  

Science Conference Proceedings (OSTI)

With increasing penetration levels of solar photovoltaics (PV), the need for inverter technology to provide grid support has become more and more critical. Since 2009, the Electric Power Research Institute (EPRI) and industry partners have been working to establish a common set of functions that can provide such capability. The development of a common set of functions is complete; however, very little work to date has addressed the impact that these common functions will have on grid performance, ...

2013-12-20T23:59:59.000Z

242

Composite wire microelectrode and method of making same  

DOE Patents (OSTI)

A composite wire microelectrode for making electro-chemical measurements, and method of making same, are disclosed. The microelectrode includes an inner conductive sensing wire and an outer tube that is oxidized to form a dielectric, self-healing oxide layer around the sensing wire. 4 figs.

Isaacs, H.S.; Aldykiewicz, A.J. Jr.

1996-12-03T23:59:59.000Z

243

Wire-Extrusion Process Disrupted By Voltage Sags  

Science Conference Proceedings (OSTI)

This PQTN Case Study investigates voltage sags originating from a utility distribution system at a wire-extrusion plant near Cleveland, Ohio that were causing a wire-drawing process to malfunction, resulting in broken tungsten wire and hours of time spent restarting the manufacturing process.

2003-12-31T23:59:59.000Z

244

Composite wire microelectrode and method of making same  

DOE Patents (OSTI)

A composite wire microelectrode for making electro-chemical measurements, and method of making same. The microelectrode includes an inner conductive sensing wire and an outer tube that is oxidized to form a dielectric, self-healing oxide layer around the sensing wire.

Isaacs, Hugh S. (Shoreham, NY); Aldykiewicz, Jr., Antonio J. (Thiells, NY)

1996-12-03T23:59:59.000Z

245

Integration of Xantrex HY-100 Hybrid Inverter with an AC Induction Wind Turbine  

SciTech Connect

Several issues must be addressed before solid-state inverters can be used in wind-diesel systems with larger wind turbines. This project addresses those issues by using a commercial hybrid inverter designed for PV-diesel systems and modifying the inverter for use with an AC induction wind turbine. Another approach would have entailed building an inverter specifically for use with an AC induction wind turbine, but that was beyond the scope of this project. The inverter chosen for this project was a Xantrex HY-100, an inverter designed for PV systems. The unit consists of an inverter/rectifier bridge, a generator interface contactor, a battery charge controller, a hybrid controller, and the associated control electronics. Details of the inverter may be found in Appendix A. A twofold approach was taken to integrating the existing inverter for use with an AC induction wind turbine: 1) development of a detailed model to model both steady-state and transient behavior of the system, and 2) modification and testing of the inverter with an induction wind turbine based on the modeling results. This report describes these two tasks.

Corbus, D.; Newcomb, C.; Friedly, S.

2003-05-01T23:59:59.000Z

246

Sandia National Laboratories: Research: Research Foundations: Radiation  

NLE Websites -- All DOE Office Websites (Extended Search)

Radiation Effects and High Energy Density Science Radiation Effects and High Energy Density Science Rings of Saturn, Sandia's workhorse pulsed-power machine. The Radiation Effects and High Energy Density Science Research Foundation seeks to advance science and engineering in the areas of radiation effects sciences, high energy density science, and pulsed-power science and technology to address critical national security issues. Why our work matters We address several issues key to nuclear security and maintaining a safe, secure, and effective nuclear stockpile. For example, radiation effects science ensures that engineered systems are able to operate as intended in the radiation environments they encounter. In addition, high energy density science validates models that are used to certify the performance of the

247

Expert Meeting Report: Foundations Research Results  

SciTech Connect

In the Expert Meeting Plan, the NorthernSTAR Team proposed to host two Expert Meetings in calendar year 2011. Invitees to the meetings would include experts in the current field of study, other BA team members, and representatives from DOE and NREL. They will invite leading industry experts to present at these meetings. The Expert Meetings will focus on key systems areas that will be required to meet the Building America performance goals and shall be sufficiently narrow in scope that specific conclusions, action items, and delegation of future tasks can be identified and completed. The two expert meeting topics are 'Foundations' and 'Window Retrofit.' The first session is designed as a webinar only and the second will be a live meeting.

Ojczyk, C.; Huelman, P.; Carmody, J.

2013-05-01T23:59:59.000Z

248

Expert Meeting Report: Foundations Research Results  

SciTech Connect

In the Expert Meeting Plan, the NorthernSTAR Team proposed to host two Expert Meetings in calendar year 2011. Invitees to the meetings would include experts in the current field of study, other BA team members, and representatives from DOE and NREL. They will invite leading industry experts to present at these meetings. The Expert Meetings will focus on key systems areas that will be required to meet the Building America performance goals and shall be sufficiently narrow in scope that specific conclusions, action items, and delegation of future tasks can be identified and completed. The two expert meeting topics are 'Foundations' and 'Window Retrofit.' The first session is designed as a webinar only and the second will be a live meeting.

Ojczyk, C.; Huelman, P.; Carmody, J.

2013-05-01T23:59:59.000Z

249

Information architecture. Volume 1, The foundations  

SciTech Connect

The Information Management Planning and Architecture Coordinating Team was formed to establish an information architecture framework to meet DOE`s current and future information needs. This department- wide activity was initiated in accordance with the DOE Information Management Strategic Plan; it also supports the Departmental Strategic Plan. It recognizes recent changes in emphasis as reflected in OMB Circular A-130 and the Information Resources Management Planning Process Improvement Team recommendations. Sections of this document provides the foundation for establishing DOE`s Information Architecture: Background, Business Case (reduced duplication of effort, increased integration of activities, improved operational capabilities), Baseline (technology baseline currently in place within DOE), Vision (guiding principles for future DOE Information Architecture), Standards Process, Policy and Process Integration (describes relations between information architecture and business processes), and Next Steps. Following each section is a scenario. A glossary of terms is provided.

1995-03-01T23:59:59.000Z

250

DOE Office of Indian Energy Foundational Course on Geothermal  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE OFFICE OF INDIAN ENERGY Foundational Courses Renewable Energy Technologies GEOTHERMAL Presented by the National Renewable Energy Laboratory Course Outline What we will cover......

251

Foundation Analysis and Design (FAD) Tools Version 5.1  

Science Conference Proceedings (OSTI)

Foundation Analysis and Design (FAD) Tools is a software package that provides for the design of transmission line foundations for single pole structures (MFAD), H-frame structures (HFAD) and steel towers (TFAD). The FAD Tools software provides for the design of drilled shafts and direct embedded poles in soil and rock for single pole foundations (MFAD), and drilled shafts and direct embedded poles in soil and rock for H-frame foundations (HFAD) and drilled shafts for steel towers (TFAD). The software ha...

2010-12-10T23:59:59.000Z

252

NETL: News Release - Kentucky Research Foundation Signs $9 Million...  

NLE Websites -- All DOE Office Websites (Extended Search)

Will Make Commercial Use of Coal Combustion Byproduct WASHINGTON, DC - A team led by the University of Kentucky Research Foundation of Lexington, Ky., recently signed an agreement...

253

News and Update: National Science Foundation Responds to ...  

Science Conference Proceedings (OSTI)

National Science Foundation Responds to Terrorist Assault with Emergency Research, .... the WTC and the response of hospitals and other emergency services.

254

High density harp or wire scanner for particle beam diagnostics  

DOE Patents (OSTI)

A diagnostic detector head harp (23) used to detect and characterize high energy particle beams using an array of closely spaced detector wires (21), typically carbon wires, spaced less than 0.1 cm (0.040 inch) connected to a hybrid microcircuit (25) formed on a ceramic substrate (26). A method to fabricate harps (23) to obtain carbon wire spacing and density not previously available utilizing hybrid microcircuit technology. The hybrid microcircuit (25) disposed on the ceramic substrate (26) connects electrically between the detector wires (21) and diagnostic equipment (37) which analyzes pulses generated in the detector wires (21) by the high energy particle beams.

Fritsche, Craig T. (Overland Park, KS); Krogh, Michael L. (Lee' s Summit, MO)

1996-05-21T23:59:59.000Z

255

Utility-scale grid-tied PV inverter reliability workshop summary report.  

DOE Green Energy (OSTI)

A key to the long-term success of the photovoltaic (PV) industry is confidence in the reliability of PV systems. Inverters are the most commonly noted cause of PV system incidents triggered in the field. While not all of these incidents are reliability-related or even necessarily failures, they still result in a loss of generated power. With support from the U.S. Department of Energy's Solar Energy Technologies Program, Sandia National Laboratories organized a Utility-Scale Grid-Tied Inverter Reliability Workshop in Albuquerque, New Mexico, January 27-28, 2011. The workshop addressed the reliability of large (100-kilowatt+) grid-tied inverters and the implications when such inverters fail, evaluated inverter codes and standards, and provided discussion about opportunities to enhance inverter reliability. This report summarizes discussions and presentations from the workshop and identifies opportunities for future efforts.

Granata, Jennifer E.; Quintana, Michael A.; Tasca, Coryne Adelle (SRA International, Inc., Fairfax, VA); Atcitty, Stanley

2011-07-01T23:59:59.000Z

256

Utility-scale grid-tied PV inverter reliability workshop summary report.  

SciTech Connect

A key to the long-term success of the photovoltaic (PV) industry is confidence in the reliability of PV systems. Inverters are the most commonly noted cause of PV system incidents triggered in the field. While not all of these incidents are reliability-related or even necessarily failures, they still result in a loss of generated power. With support from the U.S. Department of Energy's Solar Energy Technologies Program, Sandia National Laboratories organized a Utility-Scale Grid-Tied Inverter Reliability Workshop in Albuquerque, New Mexico, January 27-28, 2011. The workshop addressed the reliability of large (100-kilowatt+) grid-tied inverters and the implications when such inverters fail, evaluated inverter codes and standards, and provided discussion about opportunities to enhance inverter reliability. This report summarizes discussions and presentations from the workshop and identifies opportunities for future efforts.

Granata, Jennifer E.; Quintana, Michael A.; Tasca, Coryne Adelle (SRA International, Inc., Fairfax, VA); Atcitty, Stanley

2011-07-01T23:59:59.000Z

257

Evaluation of Three-Phase Photovoltaic Inverters with Grid Support Functionality  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) inverters are capable of providing grid-friendly functionalities, including reactive current support, active power control, frequency-watt control, and ride through for abnormal grid voltage. This technical update presents laboratory test results of two three-phase inverters with several of these grid support functionalities enabled. The inverters tested in this project are Sunny Tripower 10000TL from SMA Germany and the PVI 82KW from Solectria Renewables, LLC. Sunny Tripower is ...

2012-11-30T23:59:59.000Z

258

Conductor and Shield Wire Inspection and Assessment  

Science Conference Proceedings (OSTI)

With thousands of miles of transmission lines nearing the end of their expected service life, conductor life and reliability are of increasing concern to many utilities. The consequences of conductor failure can be significant and its impacts widespread. ACSR conductors have been identified as the most problematic of all the conductors because the conductor core cannot be assessed visually. ACSR conductors have a steel stranded core to carry the wire tension load and two or more layers of aluminum strand...

2008-12-10T23:59:59.000Z

259

A Generalized Inverter Control Method for a Variable Speed Wind Power System Under Unbalanced Operting Conditions.  

E-Print Network (OSTI)

??This thesis presents a generalized control method for complete harmonic elimination and adjustable power factor of a grid side inverter under unbalanced operating conditions used… (more)

Wu, Shuang

2010-01-01T23:59:59.000Z

260

Developement of a digitally controlled low power single phase inverter for grid connected solar panel.  

E-Print Network (OSTI)

?? The work consists in developing a power conversion unit for solar panel connected to the grid. This unit will be a single phase inverter… (more)

Marguet, Raphael

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Energy Capture Improvement of a Solar PV System Using a Multilevel Inverter.  

E-Print Network (OSTI)

??The challenges with solar energy extraction are addressed in the proposed approach through development and demonstration of multilevel inverter architecture and the associated control algorithms.… (more)

Mahmud, Nayeem

2011-01-01T23:59:59.000Z

262

Integral inverter/battery charger for use in electric vehicles. Final report  

SciTech Connect

The design and test results of a thyristor based inverter/charger are discussed. A battery charger is included integral to the inverter by using a subset of the inverter power circuit components. The resulting charger provides electrical isolation between the vehicle propulsion battery and ac line and is capable of charging a 25 kWh propulsion battery in 8 hours from a 220 volt ac line. The integral charger employs the inverter commutation components as a resonant ac/dc isolated converter rated at 3.6 kW. Charger efficiency and power factor at an output power of 3.6 kW are 86% and 95%, respectively. The inverter, when operated with a matching polyphase ac induction motor and nominal 132 volt propulsion battery, can provide a peak shaft power of 34 kW (45 hp) during motoring operation and 45 kW (60 hp) during regeneration. Thyristors are employed for the inverter power switching devices and are arranged in an input-commutated topology. This configuration requires only two thyristors to commutate the six main inverter thyristors. Inverter efficiency during motoring operation at motor shaft speeds above 450 rad/sec (4300 rpm) is 92 to 94% for output power levels above 11 KW (15 hp). The combined ac inverter/charger package weighs 47 kg (103 lbs).

Thimmesch, D.

1983-09-01T23:59:59.000Z

263

Mathematical model for the bridge-type auxiliary impulse commutated power inverter  

SciTech Connect

This paper presents analytical picture for the utilization of the auxiliary impulse commutated inverter in connection with various direct energy conversion devices. To ensure effective inversion, V-A switching characteristics as well as power handling capacities with respect to interconnected modules have to be matched with loading conditions at the inverter output. Mathematical model for this inverter could be used as the basic criterion for expressing the time varying voltage output with respect to the specific applied from the direct energy conversion device. Pure sinusoidal inverter output voltage could be secured through total neutralization of impulse and DC components by filtering.

Denno, K.

1980-12-01T23:59:59.000Z

264

A new current source GTO inverter with sinusoidal output voltage and current  

SciTech Connect

A new current source inverter with sinusoidal output voltage and current is presented. Gate turn-off thyristors (GTO's) and pulsewidth modulation (PWM) control techniques are used in the current source inverter to produce the sinusoidal output voltage and current. Three capacitors are connected to the ac output terminals to absorb overvoltages which occur when the GTO current is cut off and to provide a filter function for reducing harmonics in the output current. Voltage spikes, which have been a serious problem in the practical application of this inverter, are suppressed by adding gate pulses which force the inverter into a state of shoot-through. Moreover, this inverter permits the capacitance of an ac output terminal capacitor for absorbing overvoltages to be reduced to one-tenth or less of that of a commutating capacitor in a conventional thyristor type current source inverter. A 3.7-kW induction motor is driven by the inverter. The motor efficiency and noise level are measured and compared with those obtained when the motor is driven by a conventional voltage source PWM inverter. An operating efficiency five or six percent higher and noise level 10 dB lower are obtained for the former. Therefore, this current source GTO inverter is very suitable for ac motor variable speed drives.

Hombu, M.; Matsuda, Y.; Ueda, A.; Ueda, S.

1985-09-01T23:59:59.000Z

265

Arizona Foundation Expands Weatherization Training Center | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Arizona Foundation Expands Weatherization Training Center Arizona Foundation Expands Weatherization Training Center Arizona Foundation Expands Weatherization Training Center September 22, 2010 - 10:21am Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE To an outsider, Arizona's Foundation for Senior Living (FSL) probably sounds like an organization that deals just with retired folks. But a closer look reveals a more diverse organization. Not only does the 35-year-old nonprofit perform energy upgrades for low-income residents, but in Maricopa County and the Phoenix area it also trains a good part of the weatherization workforce to do that. Expanding building science Since 2004, more than 1,450 people have completed programs at the Foundation's weatherization training center. Now, because of Weatherization

266

Honduras-Evaluation of Covelo Foundation DCA Guarantees | Open Energy  

Open Energy Info (EERE)

Honduras-Evaluation of Covelo Foundation DCA Guarantees Honduras-Evaluation of Covelo Foundation DCA Guarantees Jump to: navigation, search Name Honduras-Evaluation of Covelo Foundation DCA Guarantees Agency/Company /Organization U.S. Agency for International Development Sector Energy Topics Finance, Co-benefits assessment, Background analysis Website http://www.usaid.gov/our_work/ Country Honduras UN Region Latin America and the Caribbean References Honduras-Evaluation of Covelo Foundation DCA Guarantees[1] Background "This report presents findings and conclusions from an evaluation, carried out in March and April of 2009, of DCA guarantees used by the José Maria Covelo Foundation (FJMC) in Honduras. The evaluation sought to answer seven evaluation questions concerning the outputs, outcomes, and impact of the

267

Third Radiation Effects Research Foundation Board of Councilors Meeting  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Third Radiation Effects Research Foundation Board of Councilors Third Radiation Effects Research Foundation Board of Councilors Meeting Held in Hiroshima Third Radiation Effects Research Foundation Board of Councilors Meeting Held in Hiroshima July 22, 2013 - 4:54pm Addthis Third Radiation Effects Research Foundation Board of Councilors Meeting Held in Hiroshima The third Board of Councilors (BOC) meeting was held on June 18-19 at the Hiroshima Radiation Effects Research Foundation (RERF), a bi-national U.S.-Japan research organization. The BOC is the highest decision-making body at RERF, consisting of eight Councilors elected from the United States and Japan. A total of 23 participants, including 8 Councilors from the United States and Japan and officials from the U.S. and Japanese Governments, were present at the meeting. The Office of Health, Safety and

268

Arizona Foundation Expands Weatherization Training Center | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Arizona Foundation Expands Weatherization Training Center Arizona Foundation Expands Weatherization Training Center Arizona Foundation Expands Weatherization Training Center September 22, 2010 - 10:21am Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE To an outsider, Arizona's Foundation for Senior Living (FSL) probably sounds like an organization that deals just with retired folks. But a closer look reveals a more diverse organization. Not only does the 35-year-old nonprofit perform energy upgrades for low-income residents, but in Maricopa County and the Phoenix area it also trains a good part of the weatherization workforce to do that. Expanding building science Since 2004, more than 1,450 people have completed programs at the Foundation's weatherization training center. Now, because of Weatherization

269

Fault Current Contribution from Single-Phase PV Inverters  

DOE Green Energy (OSTI)

A significant increase in photovoltaic (PV) system installations is expected to come on line in the near future and as the penetration level of PV increases, the effect of PV may no longer be considered minimal. One of the most important attributions of additional PV is what effect this may have on protection systems. Protection engineers design protection systems to safely eliminate faults from the electric power system. One of the new technologies recently introduced into the electric power system are distributed energy resources (DER). Currently, inverter-based DER contributes very little to the power balance on all but a few utility distribution systems. As DER become prevalent in the distribution system, equipment rating capability and coordination of protection systems merit a closer investigation. A collaborative research effort between the National Renewable Energy Laboratory (NREL) and Southern California Edison (SCE) involved laboratory short-circuit testing single-phase (240 VAC) residential type (between 1.5 and 7kW) inverters. This paper will reveal test results obtained from these short-circuit tests.

Keller, J.; Kroposki, B.; Bravo, R.; Robles, S.

2011-01-01T23:59:59.000Z

270

Soil structure interaction for shrink-swell soils a new design procedure for foundation slabs on shrink-swell soils  

E-Print Network (OSTI)

Problems associated with shrink-swell soils are well known geotechnical problems that have been studied and researched by many geotechnical researchers for many decades. Potentially shrink-swell soils can be found almost anywhere in the world especially in the semi-arid regions of the tropical and temperate climate. Foundation slabs on grade on shrink-swell soils are one of the most efficient and inexpensive solutions for this kind of problematic soil. It is commonly used in residential foundations or any light weight structure on shrink-swell soils. Many design methods have been established for this specific problem such as Building Research Advisory Board (BRAB), Wire Reinforcement Institute (WRI), Post- Tensioning Institute (PTI), and Australian Standards (AS 2870) design methods. This research investigates most of these methods, and then, proposes a moisture diffusion soil volume change model, a soil-weather interaction model, and a soil-structure interaction model. The proposed moisture diffusion soil volume change model starts with proposing a new laboratory test to determine the coefficient of unsaturated diffusivity for intact soils. Then, it introduces the development of a cracked soil diffusion factor, provides a chart for it, and explains a large scale laboratory test that verifies the proposed moisture diffusion soil volume change model. The proposed soil-weather interaction model uses the FAO 56-PM method to simulate a weightless cover performance for six cities in the US that suffer significantly from shallow foundation problems on shrink-swell soils due to seasonal weather variations. These simulations provide more accurate weather site-specific parameters such as the range of surface suction variations. The proposed weather-site specific parameters will be input parameters to the soil structure models. The proposed soil-structure interaction model uses Mitchell (1979) equations for moisture diffusion under covered soil to develop a new closed form solution for the soil mound shape under the foundation slab. Then, it presents a parametric study by carrying out several 2D finite elements plane strain simulations for plates resting on a semiinfinite elastic continuum and resting on different soil mounds. The parametric study outcomes are then presented in design charts that end with a new design procedure for foundation slabs on shrink-swell soils. Finally, based on the developed weather-soil-structure interaction models, this research details two procedures of a proposed new design method for foundation slabs on grade on shrink-swell soils: a suction based design procedure and a water content based design procedure.

Abdelmalak, Remon Melek

2007-12-01T23:59:59.000Z

271

''Water bath'' effect during the electrical underwater wire explosion  

SciTech Connect

The results of a simulation of underwater electrical wire explosion at a current density >10{sup 9} A/cm{sup 2}, total discharge current of {approx}3 MA, and rise time of the current of {approx}100 ns are presented. The electrical wire explosion was simulated using a one-dimensional radiation-magnetohydrodynamic model. It is shown that the radiation of the exploded wire produces a thin conducting plasma shell in the water in the vicinity of the exploding wire surface. It was found that this plasma shell catches up to 30% of the discharge current. Nevertheless, it was shown that the pressure and temperature of the wire material remain unchanged as compared with the idealized case of the electrical wire explosion in vacuum. This result is explained by a 'water bath' effect.

Oreshkin, V. I.; Chaikovsky, S. A.; Ratakhin, N. A.; Grinenko, A.; Krasik, Ya. E. [High Current Electronic Institute SB RAS, Tomsk (Russian Federation); Physics Department, Technion, Haifa 32000 (Israel)

2007-10-15T23:59:59.000Z

272

Study on the Harmonics of Photovoltaic Generation SPWM Inverting Power Supplies  

Science Conference Proceedings (OSTI)

Harmonics are the main polluting source of affecting the power energy quality. In this paper, the causes that SPWM inverter power supply produces the harmonics are analyzed firstly and then a new three-phase ?-band-pass filter is designed to improve ... Keywords: harmonious, solar energy photovoltaic power, inverter, current ripples component

Jianqu Zhu; Feng Wang; Taiqiang Cao

2012-04-01T23:59:59.000Z

273

Performance Test Protocol for Evaluating Inverters Used in Grid-Connected  

E-Print Network (OSTI)

Performance Test Protocol for Evaluating Inverters Used in Grid-Connected Photovoltaic Systems....................................................................................................................................... 36 A1 Simplified Photovoltaic I-V Curve Model Inverters Used in Grid-Connected Photovoltaic Systems 1 Overview One measure of the maturity of an industry

274

A model reduction approach for constructing compact dynamic thermal models of IGBT-modules of inverters  

Science Conference Proceedings (OSTI)

This paper presents a model reduction approach for constructing lumped RC thermal networks of IGBT-modules of inverters for which heat and subsequent temperature increases vary with time on different scales ranging from nanosecond to second. It was observed ... Keywords: Compact thermal modelling, Electro-thermal simulation, IGBT-modules, Inverters, Thermal analysis

J. Antonios; N. Ginot; C. Batard; Y. Scudeller; M. Machmoum

2012-06-01T23:59:59.000Z

275

Different methods for direct torque control of induction motor fed from current source inverter  

Science Conference Proceedings (OSTI)

Two different methods for direct torque control (DTC) of induction motor fed from current source inverter (CSI) is analyzed in the paper. The first one is derived from well-known DTC strategy developed for voltage inverter drives. This type of control ... Keywords: CSI, DTC, constant switching, hysteresis comparator, induction motor

Aleksandar Nikolic; Borislav Jeftenic

2008-07-01T23:59:59.000Z

276

Influence of voltage drop to electric drive with induction motor and voltage sourced inverter  

Science Conference Proceedings (OSTI)

This paper solves problematic of immunity from the voltage drop of the power supply of the electric drive with induction motor with Voltage-Fed inverter. There are reflected opportune control algorithms for the quickly to change of working regime from ... Keywords: electric drive with induction motor, electric drive with voltage sourced inverter, voltage drop

P. Beneš; J. Fo?t; M. Pittermann

2011-09-01T23:59:59.000Z

277

Switching response modeling of the CMOS inverter for sub-micron devices  

Science Conference Proceedings (OSTI)

In this paper an accurate, analytical model for the evaluation of the CMOS inverter delay in the sub- micron regime, is presented. A detailed analysis of the inverter operation is provided which results to accurate expressions describing the output waveform. ... Keywords: CMOS circuits timing analysis, Propagation delay modeling, Sub-micron devices.

L. Bisdounis; S. Nikolaidis; O. Koufopavlou; C. E. Goutis

1998-02-01T23:59:59.000Z

278

A New Multi-level Inverter with FACTS Capabilities for Wind Applications  

Science Conference Proceedings (OSTI)

The modular multilevel converter (MMC) is an attractive topology for HVDC/FACTS systems. In this paper a new single-phase MMC-based D-STATCOM inverter for grid connection is proposed. The proposed inverter is designed for grid-connected wind turbines ... Keywords: D-STATCOM, Modular Multi-level Converter, Renewable Energy Source

Pedram Sotoodeh, Ruth Douglas Miller

2013-04-01T23:59:59.000Z

279

Towards an understanding of light activation processes in titanium oxide based inverted organic solar cells  

E-Print Network (OSTI)

, 233903 (2012) Thin-film encapsulation of inverted indium-tin-oxide-free polymer solar cells by atomic structures.2­5 In an inverted PSC, electrons are collected by the indium tin oxide (ITO) bottom electrode of increasing attention around the world for the last 20 years as a potential source of renewable energy. PSC

280

Ligand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells  

E-Print Network (OSTI)

transient photovoltaic behavior in inverted organic solar cells Jong Bok Kim,1,a) Seokhoon Ahn,2,b) Seok JuLigand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells Jong Bok Kim, Seokhoon Ahn, Seok Ju Kang, Colin Nuckolls, and Yueh-Lin Loo Citation: Appl

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Synchronization and Power Sharing for Droop-Controlled Inverters in Islanded Microgrids  

E-Print Network (OSTI)

Synchronization and Power Sharing for Droop-Controlled Inverters in Islanded Microgrids John W in an inductive microgrid. We show that a network of loads and DC/AC inverters equipped with power-frequency droop model, distributed control. 1 Introduction A microgrid is a low-voltage electrical network, hetero

Bullo, Francesco

282

Inverted Troughs and Cyclogenesis over Interior North America: A Limited Regional Climatology and Case Studies  

Science Conference Proceedings (OSTI)

A limited regional climatology of cyclones with and without inverted troughs that form in the Colorado region is presented along with case study results from two major cyclone events in which an inverted trough plays a prominent role in the life ...

Len G. Keshishian; Lance F. Bosart; W. Edward Bracken

1994-04-01T23:59:59.000Z

283

Status and Needs of Power Electronics for Photovoltaic Inverters: Summary Document  

SciTech Connect

Photovoltaic inverters are the most mature of any DER inverter, and their mean time to first failure (MTFF) is about five years. This is an unacceptable MTFF and will inhibit the rapid expansion of PV. With all DER technologies, (solar, wind, fuel cells, and microturbines) the inverter is still an immature product that will result in reliability problems in fielded systems. The increasing need for all of these technologies to have a reliable inverter provides a unique opportunity to address these needs with focused R&D development projects. The requirements for these inverters are so similar that modular designs with universal features are obviously the best solution for a ''next generation'' inverter. A ''next generation'' inverter will have improved performance, higher reliability, and improved profitability. Sandia National Laboratories has estimated that the development of a ''next generation'' inverter could require approximately 20 man-years of work over an 18- to 24-month time frame, and that a government-industry partnership will greatly improve the chances of success.

WEST, RICK; MAUCH, KONRAD; QIN,YU CHIN; MOHAN,NED; BONN, RUSSELL H.

2002-04-01T23:59:59.000Z

284

Noise-Tolerant Model of a Ternary Inverter Based on Markov Random Field  

Science Conference Proceedings (OSTI)

A noise-tolerant model of a ternary inverter is proposed based on extension of Markov Random Field (MRF). Simulation results are reported to justify the noise immunity of this model using PSPICE and 16-nm Berkeley CMOS technology. Keywords: ternary inverter, noise-tolerance, Markov random field model

Golam Tangim, Svetlana N. Yanushkevich, Seiya Kasai, Vlad P. Shmerko

2013-05-01T23:59:59.000Z

285

Evaluation tests of Abacus 6 kVA utility-interactive inverter  

SciTech Connect

The voltage pattern spectra were analyzed for 100% and 50% pattern ratios and harmonics analyses are provided for the Abacus inverter. The harmonics are compared with those calculated for a simple model with no agreement. AC waveforms and inverter current spectra are given as well as basic electrical data. (LEW)

Landsman, E.E.

1981-08-01T23:59:59.000Z

286

An SCR inverter with an integral battery charger for electric vehicles  

SciTech Connect

A thyristor-based inverter/charger for use in electric passenger vehicles is described, and prototype charger test results are presented. A battery charger is included integral to the inverter by using a subset of the inverter power circuit components. The integral charger employs the inverter commutation components as a resonant ac/dc converter rated at 3.6 kW. The resulting charger provides electrical isolation between the vehicle propulsion battery and ac line and is capable of charging a 25kWh propulsion battery in 8 h from a 220-V ac line. Charger efficiency and power factor at an output power of 3.6 kW are 86 and 95 percent, respectively. The inverter, when operated with a matching polyphase ac induction motor and nominal 132-V propulsion battery, can provide a peak shaft power of 34 kW (45 hp) during motoring operation and 45 kW (60 hp) during regeneration. Thyristors are employed for the inverter power switching devices and are arranged in an input-commutated topology. This configuration requires only two thyristors to commutate the six main inverter thyristors. The combined ac inverter/charger package weighs 47 kg (103 lb).

Thimmesch, D.

1985-07-01T23:59:59.000Z

287

Investigating the Use of Ultrasonic Guided Waves for Aging Wire  

E-Print Network (OSTI)

Aging wiring has become a critical issue to DoD, NASA, FAA, and Industry. The problem is that insulation on environmentally aged wire becomes brittle and cracks. This exposes the underlying conductive wire to the potential for short circuits and fire. The difficulty is that techniques to monitor aging wire problems focus on applying electrical sensing techniques that are not very sensitive to the wire insulation. Thus, the development of methods to quantify and monitor aging wire insulation is highly warranted. Measurement of wire insulation stiffness by ultrasonic guided waves is being examined. Initial laboratory tests were performed on a simple model consisting of a solid cylinder and then a solid cylinder with a polymer coating. Experimental measurements showed that the lowest order axisymmetric mode may be sensitive to stiffness changes in the wire insulation. To test this theory, mil-spec wire samples MIL-W-81381, MIL-W-22759/34, and MIL-W-22759/87 (typically found in aircraft) were heat-damaged in an oven, in a range of heating conditions. The samples were 12, 16, and 20 gauge and the heat-damage introduced material changes in the wire-insulation that made the originally flexible insulation brittle and darker in color. Axisymmetric mode phasevelocity increased for the samples that were exposed to heat for longer duration. For example, the phase velocity in the 20-gauge MIL-W-22759/34 wire changed from a baseline value of 2790m/s to 3280m/s and 3530m/s for one-hour exposures to 349 C and 399 C, respectively. Although the heat-damage conditions are not the same as environmental aging, we believe that with further development and refinements, the ultrasonic guided waves can be used to inspect wire-insulation for detrimental environmental aging conditions.

Insulation Assessment Robert; Robert F. Anastasi A; Eric I. Madaras B

2002-01-01T23:59:59.000Z

288

Power-installed streetlight foundations lower substation construction costs  

SciTech Connect

The Alabama Power Company's power-installed streetlight foundation (SLF) saves 85% of labor costs and is practical as well as economical. After several foundation designs were tried, the multi-helix proved best for swampy terrain. A test of substation structure support began with soil testing to locate any rock on the site. Standard tubular-steel structures with modified baseplates were used. A truck-mounted derrick proved better for installation than a drill rig. Slight corrosive currents are not expected to cause appreciable deterioration to the foundation. (DCK)

Beason, D.

1981-07-01T23:59:59.000Z

289

Soldering Small Beads to Fine Wires  

SciTech Connect

One method suggested for soldering small beads to fine wires using a torch to heat the bead, flux, and magnesia brick did not prove entirely satisfactory in this case. It was found the brick would draw heat away from the bead and flux at too fast a rate resulting in a poor weld, a rough surface, and an excessive accumulation of flux on the bead. Secondly, removal of the depleted flux presented a problem when the welding was done on the surface of the brick.

Stanton, J. S.

1950-03-01T23:59:59.000Z

290

Corrosion Behavior of Twin Wire Arc Sprayed Inconel Coating  

Science Conference Proceedings (OSTI)

Presentation Title, Corrosion Behavior of Twin Wire Arc Sprayed Inconel Coating. Author(s), Sofiane Djeraf, Yamina Mebdoua, Hadj Lahmar, Rachid Lakhdari.

291

Challenges of Using Copper as a Bonding Wire Material  

Science Conference Proceedings (OSTI)

Due to its malleability and surface properties, gold as a wire material is ideally suited for the bonding process. However, the cost of gold has increased ...

292

Microstructural Evolution in TWIP Steels during Wire Drawing  

Science Conference Proceedings (OSTI)

The results obtained by wire drawing have been compared with those by uniaxial tension and cold rolling. It has been shown that the evolution of texture and ...

293

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide...  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward...

294

Control of Wire Rod Physical Properties Like Ultimate Tensile ...  

Science Conference Proceedings (OSTI)

Sep 1, 2001 ... Control of Wire Rod Physical Properties Like Ultimate Tensile Strength and Elongation by Close Monitoring of Rolling Energy Input

295

Characterization of Wire Bonds Sujected to Ultrasonic ... - TMS  

Science Conference Proceedings (OSTI)

May 1, 2007 ... Characterization of Wire Bonds Sujected to Ultrasonic Welding and Thermal Cycling by Anil Saigal, Peterson Silva, Robert Greif and Michael ...

296

The Superelastic Behavior of Ti-Ni Superelastic Wire Rope  

Science Conference Proceedings (OSTI)

The advantages of superelastic wire ropes are better fatigue life, increase bending flexibility and increase responsively. There are few studies of superelastic ...

297

ORNL and SuperPower Sign Superconducting Wire Agreement  

for more efficient transmission of electricity. ... line networks; and increase power-transmission capacity. Second-generation (2G) wires made by

298

Hot Wire Chemical Vapor Deposition with Carbide Filaments ...  

Many of the current industry cells in production have come through NREL, ... One deposition technology utilized at NREL deals with hot wire chemical ...

299

Alliant Energy (Wisconsin Power and Light)- Farm Wiring Financing Program  

Energy.gov (U.S. Department of Energy (DOE))

Alliant Energy (Wisconsin Power & Light) offers a farm wiring financing program to increase farm safety, productivity and efficiency, while decreasing the potential for stray voltage on...

300

Bimetallic steel/aluminum wire for overhead telecommunication lines  

Science Conference Proceedings (OSTI)

for power transmission and overhead telecommunication lines and other .... " Method of manufacture of bimetallic wire for, e.g., trolley-bus cable or rods, n Inven-.

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Numerical Simulations of Wire and Foil Behaviors under Megaampere...  

National Nuclear Security Administration (NNSA)

2: High Energy Density, Plasmas, Magnetic Fields Numerical Simulations of Wire and Foil Electrical Explosion under Helical EMG Current Drive for Warm Dense Matter Generation S.F....

302

An Updated Assessement of Copper Wire Thefts from Electric Utilities...  

NLE Websites -- All DOE Office Websites (Extended Search)

infrastructure in the United States. This report updates a previously published report on copper wire theft. The combined efforts of electric utilities, lawmakers, scrap metal...

303

Electrical and capacitive methods for detecting degradation in wire insulation.  

E-Print Network (OSTI)

??Motivated by a need within the aerospace industry to detect and characterize degradation in the insulation of onboard wires, this thesis reports testing of several… (more)

Sheldon, Robert Thomas

2012-01-01T23:59:59.000Z

304

Processing of Aluminum Wires and Its Effect on Their Electrical ...  

Science Conference Proceedings (OSTI)

The treated specimens were mechanically tested and their electrical resistivity was measured and compared with pure aluminum wires. The highest electrical ...

305

ELECTROSTATIC MODELING OF THE JEFFERSON LABORATORY INVERTED CERAMIC GUN  

SciTech Connect

Jefferson Laboratory (JLab) is currently developing a new 500kV DC electron gun for future use with the FEL. The design consists of two inverted ceramics which support a central cathode electrode. This layout allows for a load-lock system to be located behind the gun chamber. The electrostatic geometry of the gun has been designed to minimize surface electric field gradients and also to provide some transverse focusing to the electron beam during transit between the cathode and anode. This paper discusses the electrode design philosophy and presents the results of electrostatic simulations. The electric field information obtained through modeling was used with particle tracking codes to predict the effects on the electron beam.

P. Evtushenko ,F.E. Hannon, C. Hernandez-Garcia

2010-05-01T23:59:59.000Z

306

CEBAF 200 kV Inverted Electron Gun  

Science Conference Proceedings (OSTI)

Two DC high voltage GaAs photoguns have been built at Jefferson Lab based on a compact inverted insulator design. One photogun provides the polarized electron beam at CEBAF and operates at 130 kV bias voltage. The other gun is used for high average current lifetime studies at a dedicated test facility and has been operated at bias voltage up to 225 kV. The advantages of higher DC voltage for CEBAF include reduced space-charge emittance growth and the potential for prolonged photocathode lifetime. However, a consequence of operating at higher voltages is the increased likelihood of field emission or breakdown, both of which are unacceptable. Highlights of the R&D studies leading toward a production 200keV GaAs photogun for CEBAF will be presented.

J.M. Grames, P.A. Adderley, J. Clark, J. Hansknecht, M. Poelker, M.L. Stutzman, R. Suleiman, K.E.L. Surles-Law

2011-03-01T23:59:59.000Z

307

EV drivetrain inverter with V/HZ optimization  

DOE Patents (OSTI)

An inverter (34) which provides power to an A.C. machine (28) is controlled by a circuit (36) employing PWM control strategy whereby A.C. power is supplied to the machine at a preselectable frequency and preselectable voltage. This is accomplished by the technique of waveform notching in which the shapes of the notches are varied to determine the average energy content of the overall waveform. Through this arrangement, the operational efficiency of the A.C. machine is optimized. The control circuit includes a micro-computer which calculates optimized machine control data signals from various parametric inputs and during steady state load conditions, seeks a best V/HZ ratio to minimize battery current drawn (system losses) from a D.C. power source (32). In the preferred embodiment, the present invention is incorporated within an electric vehicle (10) employing a 144 VDC battery pack and a three-phase induction motor (18).

Gritter, David J. (Southfield, MI); O' Neil, Walter K. (Birmingham, MI)

1986-01-01T23:59:59.000Z

308

Thin films flowing down inverted substrates: two dimensional flow  

E-Print Network (OSTI)

We consider free surface instabilities of films flowing on inverted substrates within the framework of lubrication approximation. We allow for the presence of fronts and related contact lines, and explore the role which they play in instability development. It is found that a contact line, modeled by a commonly used precursor film model, leads to free surface instabilities of convective type without any additional natural or excited perturbations. A single parameter D=(3Ca)^{1/3}cot\\alpha, where Ca is the capillary number and \\alpha is the inclination angle, is identified as a governing parameter in the problem. This parameter may be interpreted to reflect the combined effect of inclination angle, film thickness, Reynolds number and the fluid flux. Variation of D leads to change of the wave-like properties of the instabilities, allowing to observe traveling wave behavior, mixed waves, and the waves resembling solitary ones.

Lin, Te-sheng

2009-01-01T23:59:59.000Z

309

THE FOUNDATION, INC. THE ALLEN SHACKELFORD AIFD MEMORIAL SCHOLARSHIP FUND  

E-Print Network (OSTI)

THE FOUNDATION, INC. THE ALLEN SHACKELFORD AIFD MEMORIAL SCHOLARSHIP FUND THE EULALAH OVERMEYER of an application for scholarship under The Allen Shackelford AIFD Memorial Scholarship Fund, The Eulalah Overmeyer

Schweik, Charles M.

310

The Children's Investment Fund Foundation Feed | Open Energy Information  

Open Energy Info (EERE)

The Children's Investment Fund Foundation Feed The Children's Investment Fund Foundation Feed Jump to: navigation, search Home | About | Inventory | Partnerships | Capacity Building | Webinars | Reports | Events | News | List Serve CLEAN Member Feeds Center for Environment and National Security at Scripps Centro de EnergĂ­as Renovables (CER) The Children's Investment Fund Foundation (CIFF) Climate and Development Knowledge Network (CDKN) Climate Technology Initiative (CTI) ClimateWorks Foundation Coalition for Rainforest Nations (CfRN) Ecofys Energy Research Centre of the Netherlands (ECN) Energy Sector Management Assistance Program of the World Bank (ESMAP) Environment and Development Action in the Third World (ENDA-TM) German Aerospace Center (DLR) German Agency for International Cooperation (GIZ) Global Village Energy Partnership (GVEP)

311

Georgia Cities Foundation - Green Communities Revolving Loan Fund (Georgia)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Georgia Cities Foundation - Green Communities Revolving Loan Fund Georgia Cities Foundation - Green Communities Revolving Loan Fund (Georgia) Georgia Cities Foundation - Green Communities Revolving Loan Fund (Georgia) < Back Eligibility Commercial Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Cooling Appliances & Electronics Construction Design & Remodeling Other Ventilation Heat Pumps Commercial Lighting Lighting Insulation Water Heating Solar Maximum Rebate $250,000 Program Info Funding Source Georgia Environmental Facilities Authority State Georgia Program Type State Loan Program Rebate Amount $10,000-$250,000 Provider Georgia Cities Foundation The Green Communities Fund is a revolving loan fund providing low-interest loans to businesses located within the city limits of any city in Georgia.

312

American Clean Skies Foundation | OpenEI Community  

Open Energy Info (EERE)

American Clean Skies Foundation Home Graham7781's picture Submitted by Graham7781(1992) Super contributor 2 October, 2012 - 14:01 Nominations open for 250,000 Multimedia Clean...

313

Research: US National Science Foundation: $19m security research programme  

Science Conference Proceedings (OSTI)

The US National Science Foundation (NSF) plans to set up a research programme for long-term solutions to computer security problems. The NSF - an independent federal agency that supports research and education in science and engineering - expects to ...

Terry Ernest-Jones

2005-05-01T23:59:59.000Z

314

The Gordon and Betty Moore Foundation | Open Energy Information  

Open Energy Info (EERE)

Place San Francisco, California Zip 94129-0910 Product Aims to improve the quality of life for future generations. References The Gordon and Betty Moore Foundation1 LinkedIn...

315

Tribal Renewable Energy Foundational Course: Electricity Grid Basics  

Energy.gov (U.S. Department of Energy (DOE))

Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on electricity grid basics by clicking on the .swf link below. You can also download the PowerPoint slides...

316

Tribal Renewable Energy Foundational Course: Assessing Energy Needs and Resources  

Energy.gov (U.S. Department of Energy (DOE))

Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on Assessing Energy Needs and Resources by clicking on the .swf link below. You can also download the...

317

Tribal Renewable Energy Foundational Course: Strategic Energy Planning  

Energy.gov (U.S. Department of Energy (DOE))

Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on Strategic Energy Planning by clicking on the .swf link below. You can also download the PowerPoint slides...

318

Experimental determination of foundation properties without shaker tests  

E-Print Network (OSTI)

The foundation of a rotating machine can contribute to the dynamics of the system, and therefore it becomes essential to include the foundation in the model to predict the correct response of the system. The primary objective of this research is to develop and implement a method to extract foundation properties without resorting to shaker or impedance hammer testing. The method developed in this research uses the rotor vibration data and requires knowledge of bearing coefficients. The results for the foundation stiffness, damping and mass are much higher than the values extracted from impedance hammer tests at the bearing interface. Sources of errors include application of the excitation forces, measurement errors, accuracy of bearing coefficients and modal interaction between the pedestals. The concept of using fiber optic sensors to measure bearing forces is studied. Calibration and dynamic testing of the FFPI sensors is conducted. Results from this testing are encouraging and are in acceptable range of predicted values.

Sampathkumar, Varadharajan

2002-01-01T23:59:59.000Z

319

14.74 Foundations of Development Policy, Spring 2004  

E-Print Network (OSTI)

Explores the foundations of policy making in developing countries. Goal is to spell out various policy options and to quantify the trade-offs between them. Special emphasis on education, health, gender, fertility, adoption ...

Duflo, Esther, 1972-

320

Coupled Site Characterization and Foundation Analysis Research Project  

E-Print Network (OSTI)

Analysis Research Project: Rational Selection of for Drained-Strength Bearing Capacity Analysis Manhattan Research Project: Rational Selection of for Drained-Strength Bearing Capacity Analysis Manhattan CollegeCoupled Site Characterization and Foundation Analysis Research Project: Rational Selection

Horvath, John S.

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Humidity effects on wire insulation breakdown strength.  

SciTech Connect

Methods for the testing of the dielectric breakdown strength of insulation on metal wires under variable humidity conditions were developed. Two methods, an ASTM method and the twisted pair method, were compared to determine if the twisted pair method could be used for determination of breakdown strength under variable humidity conditions. It was concluded that, although there were small differences in outcomes between the two testing methods, the non-standard method (twisted pair) would be appropriate to use for further testing of the effects of humidity on breakdown performance. The dielectric breakdown strength of 34G copper wire insulated with double layer Poly-Thermaleze/Polyamide-imide insulation was measured using the twisted pair method under a variety of relative humidity (RH) conditions and exposure times. Humidity at 50% RH and below was not found to affect the dielectric breakdown strength. At 80% RH the dielectric breakdown strength was significantly diminished. No effect for exposure time up to 140 hours was observed at 50 or 80%RH.

Appelhans, Leah

2013-08-01T23:59:59.000Z

322

Electrical Resistivity Imaging for Unknown Bridge Foundation Depth Determination  

E-Print Network (OSTI)

Unknown bridge foundations pose a significant safety risk due to stream scour and erosion. Records from older structures may be non-existent, incomplete, or incorrect. Nondestructive and inexpensive geophysical methods have been identified as suitable to investigate unknown bridge foundations. The objective of the present study is to apply advanced 2D electrical resistivity imaging (ERI) in order to identify depth of unknown bridge foundations. A survey procedure is carried out in mixed terrain water and land environments with rough topography. A conventional resistivity survey procedure is used with the electrodes installed on the stream banks. However, some electrodes must be adapted for underwater use. Tests were conducted in one laboratory experimentation and at five field experimentations located at three roadway bridges, a geotechnical test site, and a railway bridge. The first experimentation was at the bridges with the smallest foundations, later working up in size to larger drilled shafts and spread footings. Both known to unknown foundations were investigated. The geotechnical test site is used as an experimental site for 2D and 3D ERI. The data acquisition is carried out along 2D profile with a linear array in the dipole-dipole configuration. The data collections have been carried out using electrodes deployed directly across smaller foundations. Electrodes are deployed in proximity to larger foundations to image them from the side. The 2D ERI can detect the presence of a bridge foundation but is unable to resolve its precise shape and depth. Increasing the spatial extent of the foundation permits better image of its shape and depth. Using electrode < 1 m to detect a slender foundation < 1 m in diameter is not feasible. The 2D ERI method that has been widely used for land surface surveys presently can be adapted effectively in water-covered environments. The method is the most appropriate geophysical method for determination of unknown bridge foundations. Fully 3D ERI method at bridge sites is labor intensive, time consuming, and does not add enough value over 2D ERI to make it worthwhile.

Arjwech, Rungroj

2011-12-01T23:59:59.000Z

323

TMS320F2812 DSP controller for dynamic voltage restorer (DVR) application for improving of a three phase inverter  

Science Conference Proceedings (OSTI)

This paper discusses a control technique improvement of a three-phase inverter using TMS320F2812 DSP controller for Dynamic Voltage Restorer (DVR) applications. The output of the inverter is then connected to a voltage grid via a second order filter ... Keywords: TMS320F2812 DSP, dynamic voltage restorer (DVR), filter, inverters, total harmonic distortion (THD)

R. Omar; N. A. Rahim

2010-07-01T23:59:59.000Z

324

WPET '98, Dearborn, Michigan, October 22-23, 1998, pp. 79-84. Multilevel Inverters for Electric Vehicle Applications  

E-Print Network (OSTI)

) and hybrid-electric vehicle (HEV) motor drives. Diode-clamped inverters and cascaded H-bridge inverters, (1 and many military combat vehicles that have large electric drives will require advanced power electronic@ornl.gov Abstract This paper presents multilevel inverters as an application for all-electric vehicle (EV

Tolbert, Leon M.

325

WireGL: a scalable graphics system for clusters  

Science Conference Proceedings (OSTI)

We describe WireGL, a system for scalable interactive rendering on a cluster of workstations. WireGL provides the familiar OpenGL API to each node in a cluster, virtualizing multiple graphics accelerators into a sort-first parallel renderer with a parallel ... Keywords: cluster rendering, parallel rendering, remote graphics, scalable rendering, tiled displays, virtual graphics

Greg Humphreys; Matthew Eldridge; Ian Buck; Gordan Stoll; Matthew Everett; Pat Hanrahan

2001-08-01T23:59:59.000Z

326

Comparison of quantum confinement effects between quantum wires and dots  

E-Print Network (OSTI)

? wire . Si GaAs InAs InP CdSe CdS CdTe ? dot ? dot ? wire ?systems like InP and CdSe. Here, we like to address thesematerials: Si, InP, InAs, GaAs, CdSe, CdS, and CdTe. Unlike

Li, Jingbo; Wang, Lin-Wang

2004-01-01T23:59:59.000Z

327

Review of Polyimide Insulated Wire in Nuclear Power Plants  

Science Conference Proceedings (OSTI)

Because of its toughness and other desirable properties, Kapton insulated wire has been test-qualified for use in nuclear power plants; however, failures of this material in military aircraft have raised safety questions. This report identifies the conditions of proper use and handling that will ensure reliable functioning of the wire under nuclear plant operating and accident conditions.

1991-03-01T23:59:59.000Z

328

Understanding and managing the effects of battery charger and inverter aging  

SciTech Connect

An aging assessment of battery chargers and inverters was conducted under the auspices of the NRC's Nuclear Plant Aging Research (NPAR) Program. The intentions of this program are to resolve issues related to the aging and service wear of equipment and systems at operating reactor facilities and to assess their impact on safety. Inverters and battery chargers are used in nuclear power plants to perform significant functions related to plant safety and availability. The specific impact of a battery charger or inverter failure varies with plant configuration. Operating experience data have demonstrated that reactor trips, safety injection system actuations, and inoperable emergency core cooling systems have resulted from inverter failures; and dc bus degradation leading to diesel generator inoperability or loss of control room annunication and indication have resulted from battery and battery charger failures. For the battery charger and inverter, the aging and service wear of subcomponents have contributed significantly to equipment failures. This paper summarizes the data and then describes methods that can be used to detect battery charger and inverter degradation prior to failure, as well as methods to minimize the failure effects. In both cases, the managing of battery charger and inverter aging is emphasized. 5 refs.

Gunther, W. (Brookhaven National Lab., Upton, NY (United States)); Aggarwal, S. (Nuclear Regulatory Commission, Washington, DC (United States))

1992-01-01T23:59:59.000Z

329

Understanding and managing the effects of battery charger and inverter aging  

SciTech Connect

An aging assessment of battery chargers and inverters was conducted under the auspices of the NRC`s Nuclear Plant Aging Research (NPAR) Program. The intentions of this program are to resolve issues related to the aging and service wear of equipment and systems at operating reactor facilities and to assess their impact on safety. Inverters and battery chargers are used in nuclear power plants to perform significant functions related to plant safety and availability. The specific impact of a battery charger or inverter failure varies with plant configuration. Operating experience data have demonstrated that reactor trips, safety injection system actuations, and inoperable emergency core cooling systems have resulted from inverter failures; and dc bus degradation leading to diesel generator inoperability or loss of control room annunication and indication have resulted from battery and battery charger failures. For the battery charger and inverter, the aging and service wear of subcomponents have contributed significantly to equipment failures. This paper summarizes the data and then describes methods that can be used to detect battery charger and inverter degradation prior to failure, as well as methods to minimize the failure effects. In both cases, the managing of battery charger and inverter aging is emphasized. 5 refs.

Gunther, W. [Brookhaven National Lab., Upton, NY (United States); Aggarwal, S. [Nuclear Regulatory Commission, Washington, DC (United States)

1992-06-01T23:59:59.000Z

330

Analysis of Supercooled Liquid Water Measurements Using Microwave Radiometer and Vibrating Wire Devices  

Science Conference Proceedings (OSTI)

A review is made of the theoretical basis for using a vibrating wire to measure supercooled liquid water in clouds. The device consists of a vibrating wire and associated electronics added to radiosondes. The sensing wire that collects ...

Geoffrey E. Hill

1994-10-01T23:59:59.000Z

331

ORNL Publishes Study on Superconducting Wire Performance | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ORNL Publishes Study on Superconducting Wire Performance ORNL Publishes Study on Superconducting Wire Performance ORNL Publishes Study on Superconducting Wire Performance August 23, 2013 - 4:06pm Addthis The Department of Energy's Oak Ridge National Laboratory (ORNL) recently released a new study on advances in superconducting wire technology. A team led by ORNL's Amit Goyal demonstrated that the ability to control nanoscale imperfections in superconducting wires results in materials with excellent and customized performance. The team's findings are published in Nature Publishing Group's Scientific Reports. The full press release and link to the new report are available on ORNL's website. Dr. Goyal, a high temperature superconductivity (HTS) research at ORNL, won the Department's 2011 E.O. Lawrence Award in the inaugural category of

332

Alliant Energy (Wisconsin Power and Light) - Farm Wiring Grant Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Alliant Energy (Wisconsin Power and Light) - Farm Wiring Grant Alliant Energy (Wisconsin Power and Light) - Farm Wiring Grant Program Alliant Energy (Wisconsin Power and Light) - Farm Wiring Grant Program < Back Eligibility Agricultural Maximum Rebate $9,000 Program Info State Wisconsin Program Type Utility Grant Program Rebate Amount $1,000 plus 50% of remaining costs Provider Alliant Energy Alliant Energy (Wisconsin Power and Light) offers a Farm Wiring Grant program to increase farm safety, productivity and efficiency. The first $1,000 of the cost of the project is covered by a grant, as well as 50% of the remaining costs (up to $9,000), for a maximum grant incentive of $10,000. Alliant Energy will inspect the facility for stray voltage and recommend improvements. Alliant's Farm Wiring Financing Program also offers

333

Intermetallic alloy welding wires and method for fabricating the same  

DOE Patents (OSTI)

Welding wires for welding together intermetallic alloys of nickel aluminides, nickel-iron aluminides, iron aluminides, or titanium aluminides, and preferably including additional alloying constituents are fabricated as two-component, clad structures in which one component contains the primary alloying constituent(s) except for aluminum and the other component contains the aluminum constituent. This two-component approach for fabricating the welding wire overcomes the difficulties associated with mechanically forming welding wires from intermetallic alloys which possess high strength and limited ductilities at elevated temperatures normally employed in conventional metal working processes. The composition of the clad welding wires is readily tailored so that the welding wire composition when melted will form an alloy defined by the weld deposit which substantially corresponds to the composition of the intermetallic alloy being joined. 4 figs.

Santella, M.L.; Sikka, V.K.

1996-06-11T23:59:59.000Z

334

Intermetallic alloy welding wires and method for fabricating the same  

SciTech Connect

Welding wires for welding together intermetallic alloys of nickel aluminides, nickel-iron aluminides, iron aluminides, or titanium aluminides, and preferably including additional alloying constituents are fabricated as two-component, clad structures in which one component contains the primary alloying constituent(s) except for aluminum and the other component contains the aluminum constituent. This two-component approach for fabricating the welding wire overcomes the difficulties associated with mechanically forming welding wires from intermetallic alloys which possess high strength and limited ductilities at elevated temperatures normally employed in conventional metal working processes. The composition of the clad welding wires is readily tailored so that the welding wire composition when melted will form an alloy defined by the weld deposit which substantially corresponds to the composition of the intermetallic alloy being joined.

Santella, Michael L. (Knoxville, TN); Sikka, Vinod K. (Oak Ridge, TN)

1996-01-01T23:59:59.000Z

335

Investigating The Use Of Ultrasound For Evaluating Aging Wiring Insulation  

E-Print Network (OSTI)

This paper reviews our initial efforts to investigate the use of ultrasound to evaluate wire insulation. Our initial model was a solid conductor with heat shrink tubing applied. In this model, various wave modes were identified. Subsequently, several aviation classes of wires (MIL-W81381, MIL-W-22759/34, and MIL-W-22759/87) were measured. The wires represented polyimide and ethylene-tetraflouroethylene insulations, and combinations of polyimide and flouropolymer plastics. Wire gages of 12, 16, and 20 AWG sizes were measured. Finally, samples of these wires were subjected to high temperatures for short periods of time to cause the insulation to degrade. Subsequent measurements indicated easily detectable changes.

Eric I. Madaras; Robert F. Anastasi

2001-01-01T23:59:59.000Z

336

Loss of line shutdown for line-commutated utility-interactive inverter  

SciTech Connect

The line-commutated, single-phase, utility-interactive inverter has been used in utility-connected photovoltaic (PV) and wind energy systems because it is commercially available at an attractive price. If unity power factor operation is required, a shunt capacitor can be used. This causes a problem if the utility line is disconnected; the inverter can continue to run and can thus be a hazard. This can be solved by using a fast-acting overvoltage detection circuit which operates directly on the inverter control electronics.

Landsman, E.E.

1981-03-01T23:59:59.000Z

337

A method for reducing harmonics in output voltages of a double-connected inverter  

SciTech Connect

A new method for reducing harmonics involved in output voltages of the double-connected inverter is proposed. By adding four auxiliary switching devices and an interphase transformer with secondary winding to the conventional 12-step inverter, output voltages of the proposed circuit can be almost the same waveforms as a conventional 36-step inverter. In this paper, circuit performances and output voltage waveforms are discussed, and the optimum parameters are derived. Then, effects on harmonic reductions can be clarified by theoretical and experimental results, and ratings of system components are investigated.

Masukawa, Shigeo; Iida, Shoji (Tokyo Denki Univ., Tokyo (Japan). Dept. of Electrical Engineering)

1994-09-01T23:59:59.000Z

338

Smart Wires Demo March 17, 2004 REVISED  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Intelligent Power Infrastructure Consortium Intelligent Power Infrastructure Consortium Smart Wires Dynamically Controllable Grid Assets Prof. Deepak Divan Associate Director, Strategic Energy Institute Director, Intelligent Power Infrastructure Consortium School of Electrical Engineering Georgia Institute of Technology 777 Atlantic Drive NW deepak.divan@ece.gatech.edu Atlanta, GA 2 Power Delivery - Major Challenge for Sustainable Energy * Wind at price parity with natural gas, retail price parity imminent for solar PV. Binding RPS mandates of 10-40% in 27 states. * To meet current reliability standards, new solar/wind plants need energy storage, back-up fossil plants & spinning reserve. * EVs require spinning reserve and back-up generation. * Excessive new T&D buildout with RPS and EVs to meet energy

339

A Preliminary Cost Study of the Dual Mode Inverter Controller  

SciTech Connect

In 1998, the Power Electronics and Electric Machinery Research Center (PEEMRC) at the Oak Ridge National Laboratory (ORNL) started a program to investigate alternate field weakening schemes for permanent magnet (PM) motors. The adjective ''alternate'' was used because at that time, outside research emphasis was on motors with interior-mounted PMs (IPMs). The PEEMRC emphasis was placed on motors with surface-mounted PMs (SPMs) because of the relative ease of manufacturing SPM motors compared with the IPM motors. Today the PEEMRC is continuing research on SPMs while examining the IPMs that have been developed by industry. Out of this task--the goal of which was to find ways to drive PM motors that inherently have low inductance at high speeds where their back-emf exceeds the supply voltage--ORNL developed and demonstrated the dual mode inverter control (DMIC) [1,2] method of field weakening for SPM motors. The predecessor of DMIC is conventional phase advance (CPA), which was developed by UQM Technologies, Inc. [3]. Fig. 1 shows the three sets of anti-parallel thyristors in the dashed box that comprise the DMIC. If one removes the dashed box by shorting each set of anti-parallel thyristors, the configuration becomes a conventional full bridge inverter on the left driving a three phase motor on the right. CPA may be used to drive this configuration ORNL's initial analyses of CPA and DMIC were based on driving motors with trapezoidal back-emfs [4-6], obtained using double layer lapped stator windings with one slot per pole per phase. A PM motor with a sinusoidal back-emf obtained with two poles per slot per phase has been analyzed under DMIC operation as a University of Tennessee-Knoxville (UTK) doctoral dissertation [7]. In the process of this research, ORNL has completed an analysis that explains and quantifies the role of inductance in these methods of control. The Appendix includes information on the equations for the three components of phase inductance, L{sub gap}, L{sub slot}, and L{sub endturns}. PM motors inherently have a lower inductance because of the increase in effective air gap caused by the magnet, which is in the denominator of the equation for L{sub gap}. L{sub gap} accounts for about half of the phase inductance. Because of the low inductance, there is a propensity for currents to exceed the motor's rated value. DMIC solves this problem for low-inductance PM motors and, in addition, provides a number of safety features that protect against uncontrolled generator mode operation [8,9]; however, the DMIC topology adds a pair of anti-parallel thyristors in each of the three phases, thereby introducing additional silicon costs as well as additional voltage drops during operation. It poses the tradeoff question; under what conditions can the beneficial features of DMIC offset its additional silicon cost and voltage drop losses? The purpose of this report is to address the tradeoff question. Sections of the report will: (1) review the role of self-inductance in performance and control of PM motors, (2) discuss the bounding inductances for motors with trapezoidal back-emfs under CPA control, (3) discuss the bounding inductances for trapezoidal back-emfs under DMIC, (4) discuss the bounding inductances for the PM synchronous motor (PMSM), (5) present the analysis showing how DMIC minimizes current in PMSMs, (6) present the results of a cost study conducted for two motors driven using a CPA inverter and for two motors driven using DMIC, (7) discuss estimating life cycle cost benefits, and (8) present conclusions.

McKeever, J.W.

2005-01-28T23:59:59.000Z

340

A Preliminary Cost Study of the Dual Mode Inverter Controller  

SciTech Connect

In 1998, the Power Electronics and Electric Machinery Research Center (PEEMRC) at the Oak Ridge National Laboratory (ORNL) started a program to investigate alternate field weakening schemes for permanent magnet (PM) motors. The adjective ''alternate'' was used because at that time, outside research emphasis was on motors with interior-mounted PMs (IPMs). The PEEMRC emphasis was placed on motors with surface-mounted PMs (SPMs) because of the relative ease of manufacturing SPM motors compared with the IPM motors. Today the PEEMRC is continuing research on SPMs while examining the IPMs that have been developed by industry. Out of this task--the goal of which was to find ways to drive PM motors that inherently have low inductance at high speeds where their back-emf exceeds the supply voltage--ORNL developed and demonstrated the dual mode inverter control (DMIC) [1,2] method of field weakening for SPM motors. The predecessor of DMIC is conventional phase advance (CPA), which was developed by UQM Technologies, Inc. [3]. Fig. 1 shows the three sets of anti-parallel thyristors in the dashed box that comprise the DMIC. If one removes the dashed box by shorting each set of anti-parallel thyristors, the configuration becomes a conventional full bridge inverter on the left driving a three phase motor on the right. CPA may be used to drive this configuration ORNL's initial analyses of CPA and DMIC were based on driving motors with trapezoidal back-emfs [4-6], obtained using double layer lapped stator windings with one slot per pole per phase. A PM motor with a sinusoidal back-emf obtained with two poles per slot per phase has been analyzed under DMIC operation as a University of Tennessee-Knoxville (UTK) doctoral dissertation [7]. In the process of this research, ORNL has completed an analysis that explains and quantifies the role of inductance in these methods of control. The Appendix includes information on the equations for the three components of phase inductance, L{sub gap}, L{sub slot}, and L{sub endturns}. PM motors inherently have a lower inductance because of the increase in effective air gap caused by the magnet, which is in the denominator of the equation for L{sub gap}. L{sub gap} accounts for about half of the phase inductance. Because of the low inductance, there is a propensity for currents to exceed the motor's rated value. DMIC solves this problem for low-inductance PM motors and, in addition, provides a number of safety features that protect against uncontrolled generator mode operation [8,9]; however, the DMIC topology adds a pair of anti-parallel thyristors in each of the three phases, thereby introducing additional silicon costs as well as additional voltage drops during operation. It poses the tradeoff question; under what conditions can the beneficial features of DMIC offset its additional silicon cost and voltage drop losses? The purpose of this report is to address the tradeoff question. Sections of the report will: (1) review the role of self-inductance in performance and control of PM motors, (2) discuss the bounding inductances for motors with trapezoidal back-emfs under CPA control, (3) discuss the bounding inductances for trapezoidal back-emfs under DMIC, (4) discuss the bounding inductances for the PM synchronous motor (PMSM), (5) present the analysis showing how DMIC minimizes current in PMSMs, (6) present the results of a cost study conducted for two motors driven using a CPA inverter and for two motors driven using DMIC, (7) discuss estimating life cycle cost benefits, and (8) present conclusions.

McKeever, J.W.

2005-01-28T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Further Characterization of New NiTi Wire and Rotary Endodontic ...  

Science Conference Proceedings (OSTI)

Presentation Title, Further Characterization of New NiTi Wire and Rotary ... Higher-resolution transmission electron microscopy examination of M-Wire used to ...

342

Nuclear Maintenance Applications Center: Wire Brush Testing, Procurement, and Usage Guide  

Science Conference Proceedings (OSTI)

Improper design, selection, or use of wire brushes will cause the loss of wire brush filaments and can result in damage to plant equipment and nuclear fuel.

2010-12-23T23:59:59.000Z

343

Selection of ENRAF gauge wire material compatible with the Hanford waste tank environment  

Science Conference Proceedings (OSTI)

This document describes the selection of the wire material that will replace the 316 SS wire in the ENRAF level indicators.

Anantatmula, R.P.

1994-12-01T23:59:59.000Z

344

A progress report on philanthropy of the UC Santa Cruz Foundation, 200708  

E-Print Network (OSTI)

ExxonMobil Foundation Norval and Mary Fairman Federal Republic of Germany Kenneth and Moira Feingold

California at Santa Cruz, University of

345

Highlighting High Performance: The Philip Merrill Environmental Center; Chesapeake Bay Foundation, Annapolis, Maryland  

SciTech Connect

Case study on high performance building features of the Chesapeake Bay Foundation's Philip Merrill Environmental Center.

Not Available

2002-04-01T23:59:59.000Z

346

Inverted Metamorphic Cell Development: Cooperative Research and Development Final Report, CRADA Number CRD-05-156  

DOE Green Energy (OSTI)

This CRADA targeted technology transfer of the inverted metamorphic multi-junction (IMM) solar cell innovation from NREL to Emcore Photovoltaics. The technology transfer was successfully completed. Additionally, NREL provided materials characterization of solar cell structures produced at Emcore.

Wanlass, M.

2012-05-01T23:59:59.000Z

347

MOVPE Growth of High Efficiency Inverted Metamorphic 1.1eV Solar ...  

Science Conference Proceedings (OSTI)

This paper focuses on the 1.1ev Ga0.77In0.23As inverted metamorphic solar cell grown with AlGaInAs quarternary step graded buffer on 6o miscut (001) thin Ge ...

348

Monitoring Gulf Stream Transport by Radar Altimeter and Inverted Echo Sounders  

Science Conference Proceedings (OSTI)

Profiles of the Gulf Stream sea surface height (SSH) from the Geosat altimeter were compared with thermocline depth measurements from inverted echo sounders (IES) for a period of about 19 months. The correlation between SSH anomalies and ...

Kathryn A. Kelly; D. Randolph Watts

1994-05-01T23:59:59.000Z

349

Commercialization of a 2.5kW Utility Interactive Inverter for Distributed Generation  

SciTech Connect

Through this project, Advanced Energy Conversion (AEC) has developed, tested, refined and is preparing to commercialize a 2.5kW utility-interactive inverter system for distributed generation. The inverter technology embodies zero-voltage switching technology that will ultimately yield a system that is smaller, less expensive and more efficient than existing commercial technologies. This program has focused on commercial success through careful synthesis of technology, market-focus and business development. AEC was the primary participant. AEC is utilizing contract manufacturers in the early stages of production, allowing its technical staff to focus on quality control issues and product enhancements. The objective of this project was to bring the AEC inverter technology from its current pre-production state to a commercial product. Federal funds have been used to build and test production-intent inverters, support the implementation of the commercialization plan and bring the product to the point of UL certification.

Torrey, David A.

2006-05-26T23:59:59.000Z

350

Observational Analysis of an Upper-Level Inverted Trough during the 2004 North American Monsoon Experiment  

Science Conference Proceedings (OSTI)

Upper-level inverted troughs (IVs) associated with midlatitude breaking Rossby waves or tropical upper-troposphere troughs (TUTTs) have been identified as important contributors to the variability of rainfall in the North American monsoon (NAM) ...

Zachary O. Finch; Richard H. Johnson

2010-09-01T23:59:59.000Z

351

The Processing and Application of Inverted Echo Sounder Data from Drake Passage  

Science Conference Proceedings (OSTI)

Bottom pressure recorders (BPRs) have been deployed at Drake Passage (DP) to monitor changes in the volume transport of the Antarctic Circumpolar Current (ACC) through the passage. The use of inverted echo sounders (IESs) in assisting the ...

Michael P. Meredith; John M. Vassie; Robert Spencer; Karen J. Heywood

1997-08-01T23:59:59.000Z

352

High Voltage Thermal Battery Reliability Required to Equal Inverter-Converter Systems  

SciTech Connect

MC-583 and XMC-650 circuits, including associated pulse transformers, are compare with the inverter-converter system typical of present fuses. The required probabilities of thermal battery shorts and opens are determined.

1955-06-14T23:59:59.000Z

353

Deadbeat control of a three-phase inverter with an output LC filter  

SciTech Connect

The discrete-time control of a three-phase inverter with an output LC filter is described based on space vectors. The mathematical model of the inverter-filter system is first obtained by using space vectors to represent three-phase quantities. Deadbeat control laws are derived for no-load and resistive-load cases. Then, a deadbeat control law is obtained for the case when the load draws current of any waveshape from the inverter-filter. It is shown that deadbeat control of output voltage can be achieved in two control steps. The manipulated variable, which is the voltage vector demanded from the inverter, is implemented using the space vector modulation technique. Simulation results for various operating conditions are presented.

Kuekrer, O. [Eastern Mediterranean Univ., G. Magosa (Turkey). Dept. of Electrical and Electronic Engineering

1996-01-01T23:59:59.000Z

354

Low-Frequency Sea Level Variability and the Inverted Barometer Effect  

Science Conference Proceedings (OSTI)

For a dynamical interpretation of sea level records, estimates are needed of the isostatic, or so-called inverted barometer, signals (?ib) associated with the ocean response to atmospheric loading. Seasonal and longer-period ?ib signals are ...

Rui M. Ponte

2006-04-01T23:59:59.000Z

355

Investigation of Converting an AS-281 to an MC-762 Sealed Inverter  

SciTech Connect

This memorandum is a summary of the techniques, problems, and tests associated with enclosing an SA-381 inverter in a hermetically sealed container for long time storage in any environment without testing.

Roh, V.J.; Lange, D.F.; Schneemann, H.

1956-10-01T23:59:59.000Z

356

Capped ED-Mode AlN/GaN Inverters - Programmaster.org  

Science Conference Proceedings (OSTI)

The demonstrated inverter is operating at VDD = 5 V and consists of an enhancement- and depletion-mode HEMT with 1.5 nm thin subcritical AlN ...

357

Beam Position and Phase Monitor - Wire Mapping System  

SciTech Connect

The Los Alamos Neutron Science Center (LANSCE) deploys many cylindrical beam position and phase monitors (BPPM) throughout the linac to measure the beam central position, phase and bunched-beam current. Each monitor is calibrated and qualified prior to installation to insure it meets LANSCE requirements. The BPPM wire mapping system is used to map the BPPM electrode offset, sensitivity and higher order coefficients. This system uses a three-axis motion table to position the wire antenna structure within the cavity, simulating the beam excitation of a BPPM at a fundamental frequency of 201.25 MHz. RF signal strength is measured and recorded for the four electrodes as the antenna position is updated. An effort is underway to extend the systems service to the LANSCE facility by replacing obsolete electronic hardware and taking advantage of software enhancements. This paper describes the upgraded wire positioning system's new hardware and software capabilities including its revised antenna structure, motion control interface, RF measurement equipment and Labview software upgrades. The main purpose of the wire mapping system at LANSCE is to characterize the amplitude response versus beam central position of BPPMs before they are installed in the beam line. The wire mapping system is able to simulate a beam using a thin wire and measure the signal response as the wire position is varied within the BPPM aperture.

Watkins, Heath A [Los Alamos National Laboratory; Shurter, Robert B. [Los Alamos National Laboratory; Gilpatrick, John D. [Los Alamos National Laboratory; Kutac, Vincent G. [Los Alamos National Laboratory; Martinez, Derwin [Los Alamos National Laboratory

2012-04-10T23:59:59.000Z

358

The Effects of a Hydrogen Environment on the Lifetime of Small-Diameter Drift Chamber Anode Wires  

DOE Green Energy (OSTI)

Possible deterioration of anode sense wires used in a hydrogen-filled neutron detector is investigated. Wires were loaded with free weights and put into a wire detector environment. Stainless Steel, Tungsten, and Platinum wires did not break after exposure to charge equivalent to many wire lifetimes. Furthermore, exposure to hydrogen gas caused no noticeable surface degradation or change in wire yield strength.

King, J; Smith, T; Kunkle, J; Castelaz, J; Thomson, S; Burstein, Z; Bernstein, A; Rosenberg, L; Hefner, M

2005-04-29T23:59:59.000Z

359

National Science Foundation - Lake Hoare, Antarctica | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

National Science Foundation - Lake Hoare, Antarctica National Science Foundation - Lake Hoare, Antarctica National Science Foundation - Lake Hoare, Antarctica October 7, 2013 - 9:57am Addthis Photo of a Photovoltaic System Located at Lake Hoare, Antarctica Lake Hoare is a scientific research site located in Antarctica. Research at this large field site is conducted all summer and requires an energy source that does not cause pollution or engine noise. The photovoltaic system (PV) that was installed at this site is 1.2 kW PV and was one of 10 PV systems purchased for use in Antarctica. Each system has eight 55 W panels that use a manual tracking system to optimize performance and provide power to the site. The system includes 1,000 amp-hours of deep-cycled gel batteries. The site operates all summer using only PV energy except for a three-day cloudy period when scientists

360

Application Guide for Integration of Grid-Supportive Inverters: Version 1  

Science Conference Proceedings (OSTI)

This application guide provides a reference for the integration of grid-supportive inverters. The guide is concise to serve as a quick reference, but also comprehensive in addressing the range of topics that utilities should consider when developing an integration strategy.Improvements in photovoltaic technology and renewable energy policies have greatly increased the number of inverter-based systems that are being connected to the grid. The vast majority of these are ...

2013-12-12T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Engineering Technical Training Modules - Battery Chargers and Inverters (ETTM - BSI) Version 1.0  

Science Conference Proceedings (OSTI)

ETTM Battery Chargers and Inverters is a computer based training module that allows users to access training when desired and review it at their own pace. It provides graphics and limited interactive features to enhance learning. The scope and purpose of this training module is to discuss the principles involved in the operations of battery chargers and inverters, and to consider industry practices used in employing these components in a typical nuclear power plant application. Although the battery is an...

2010-11-30T23:59:59.000Z

362

Modeling and dynamic performance of a line-commutated photovoltaic inverter system  

SciTech Connect

In this paper, a three-phase line-commutated utility-interactive photovoltaic inverter system is described. A simplified computer code of this system is established and presented in block-diagram form. This model is suitable for use in transient stability programs. The accuracy of the simplified model is verified by comparing the response calculated therefrom with that of a highly detailed photovoltaic system model in which the inverter is represented in valve-by-valve detail.

Wasynczuk, O. (Purdue Univ., Lafayette, IN (USA). School of Electrical Engineering)

1989-09-01T23:59:59.000Z

363

Modeling of nonstationary phenomena in the MHD-channel-inverter-substation system  

SciTech Connect

A method for constructing a mathematical model of nonstationary phenomena in a system consisting of an MHD channel and an inverter substation, operating on a powerful ac grid, is examined. The variants of the realization of the model on a computer are discussed. Results of the solution of model problems with a diagonal MHD channel are presented. It is found that there is a significant coupling between the MHD channel and the inverter substation in transient processes.

Gusev, Y.P.; Zatelepin, V.N.; Kuznetsova, T.N.; Medin, S.A.; Pishchikov, V.I.

1986-07-01T23:59:59.000Z

364

The Modeling of Vibration Damping in SMA Wires  

SciTech Connect

Through a mathematical and computational model of the physical behavior of shape memory alloy wires, this study shows that localized heating and cooling of such materials provides an effective means of damping vibrational energy. The thermally induced pseudo-elastic behavior of a shape memory wire is modeled using a continuum thermodynamic model and solved computationally as described by the authors in [23]. Computational experiments confirm that up to 80% of an initial shock of vibrational energy can be eliminated at the onset of a thermally-induced phase transformation through the use of spatially-distributed transformation regions along the length of a shape memory alloy wire.

Reynolds, D R; Kloucek, P; Seidman, T I

2003-09-16T23:59:59.000Z

365

Plasmon hybridization in parallel nano-wire systems  

Science Conference Proceedings (OSTI)

We apply the plasmon hybridization method to a double-nano-wire system, providing a simple and intuitive description of the plasmon excitations in the system. We apply the two-center cylindrical coordinate system for mathematical convenience and find an explicit form of the surface plasmon oscillations, in terms of the interaction between the bare plasmon modes of the individual surfaces of the nano-wires. We present numerical results to display how the plasmon excitations of the system depend on nano-wire separation when there is no angular momentum transfer, i.e., when m = 0.

Moradi, Afshin [Department of Nano Science, Kermanshah University of Technology, Kermanshah 67178-63766 (Iran, Islamic Republic of) and Department of Nano Science, Institute for Studies in Theoretical Physics and Mathematics (IPM), Tehran 19395-5531 (Iran, Islamic Republic of)

2011-06-15T23:59:59.000Z

366

Wire bond vibration of forward pixel tracking detector of CMS  

SciTech Connect

Wire bonds of the Forward Pixel (FPix) tracking detectors are oriented in the direction that maximizes Lorentz Forces relative to the 4 Tesla field of the Compact Muon Solenoid (CMS) Detector's magnet. The CMS Experiment is under construction at the Large Hadron Collider at CERN, Geneva, Switzerland. We were concerned about Lorentz Force oscillating the wires at their fundamental frequencies and possibly fracturing or breaking them at their heels, as happened with the CDF wire bonds. This paper reports a study to understand what conditions break such bonds.

Atac, M.; /Fermilab; Gobbi, B.; /Northwestern U.; Kwan, S.; Pischalnikov, Y.; /Fermilab; Spencer, E.; /Northwestern U.; Sellberg, G.; Pavlicek, V.; /Fermilab

2006-10-01T23:59:59.000Z

367

Addressing water vaporization in the vicinity of an exploding wire  

SciTech Connect

The phase state of thin ({approx}1 {mu}m) layer of water adjacent to the surface of rapidly heated thin wire 100{+-}50 {mu}m in radius is analyzed by computer hydrodynamic calculation. It is shown that when heating of a wire to a temperature of 420 deg. C is achieved in less than {approx}500 ns, the trajectory of the phase state is contained in the liquid part of the phase diagram. This suggests additional proof of and an explanation for the absence of shunting plasma discharge in fast underwater electrical wire explosions.

Grinenko, A.; Gurovich, V. Tz.; Krasik, Ya. E.; Dolinsky, Yu. [Physics Department, Technion, 32000 Haifa (Israel); Department of Mechanical Engineering, Ben Gurion University, 84105 Beer-Sheva (Israel)

2006-12-01T23:59:59.000Z

368

Resonant snubber based soft-switching inverters for electric propulsion drives  

SciTech Connect

This paper summarizes recently developed soft-switching inverters and proposes two alternative options for electric propulsion drives. The newly developed soft-switching inverter employs an auxiliary switch and a resonant inductor per phase to produce a zero voltage across the main switch so that the main switch can turn on at the zero-voltage condition. Both the auxiliary switch and the resonant inductor are operating at a fractional duty, and thus are small in size as compared to the main inverter circuit components. Operation modes in a complete zero-voltage switching cycle for the single-phase soft-switching inverter are described in detail with graphical explanations. The circuit operation was first verified by a computer simulation and then tested with an 1-kW single-phase and an 100-kW three-phase inverters. Experimental results are presented to show the superior performance in efficiency improvement, EMI reduction, and dv/dt reduction of the proposed soft-switching inverters.

Lai, J.S.

1996-05-01T23:59:59.000Z

369

Evaluation of Islanding Detection Methods for Utility-Interactive Inverters in Photovoltaic Systems  

SciTech Connect

This report describes the various methods and circuits that have been developed to detect an islanding condition for photovoltaic applications and presents three methods that have been developed to test those methods and circuits. Passive methods for detecting an islanding condition basically monitor parameters such as voltage and frequency and/or their characteristics and cause the inverter to cease converting power when there is sufficient transition from normal specified conditions. Active methods for detecting the island introduce deliberate changes or disturbances to the connected circuit and then monitor the response to determine if the utility grid with its stable frequency, voltage and impedance is still connected. If the small perturbation is able to affect the parameters of the load connection within prescribed requirements, the active circuit causes the inverter to cease power conversion and delivery of power to the loads. The methods not resident in the inverter are generally controlled by the utility or have communications between the inverter and the utility to affect an inverter shut down when necessary. This report also describes several test methods that may be used for determining whether the anti-islanding method is effective. The test circuits and methodologies used in the U.S. have been chosen to limit the number of tests by measuring the reaction of a single or small number of inverters under a set of consensus-based worst-case conditions.

BOWER, WARD I.; ROPP, MICHAEL

2002-11-01T23:59:59.000Z

370

Analysis of inverter models and harmonic propagation. Part II. Harmonic propagation  

SciTech Connect

Part II of a three part study describes the harmonic propagation in the photovoltaic power system consisting of the solar cell array, the inverter, and the ac side of the inverter up to the infinite bus of the utility. Propagation of the harmonics in the utility system are not addressed. Two main problems are analyzed: power in the converter system and harmonics of the current and voltage waveforms of the single-phase, dependent inverter. Relationships between the different components of the converter power - active, reactive and disturbance - are discussed. All formulas necessary for calculating the power components are given, assuming the harmonics of the current and voltage waveforms are known. The theoretical and experimental investigation of the single-phase, dependent inverter is described. The ac and dc terminal voltage of the inverter are analyzed and their harmonics are obtained. These data determine the harmonic propagation on both the dc and ac sides and may be useful for equipment design. Part I of the study (SAND 7040/1) contains a detailed description of the microcomputer based simulator that represents the output characteristics of the five commercially available types of solar cell arrays under different environmental conditions, and Part III (SAND 7040/3) presents an analysis of the transient and steady-state processes of inverter modules.

Slonim, M.A.; Stanek, E.K.

1984-09-01T23:59:59.000Z

371

Low-cost light-weight efficient 1. 5 kW inverters with and without output transformers. Final report, January 1976--June 1977  

SciTech Connect

Optimization efforts were completed on the 1.5 kW inverter described in report DECC-61098-003 (September 1975). A second inverter design was developed; in the second design the output transformer was eliminated. Tests were performed on both the optimized transformer-output inverter and the transformerless-output inverter. Tests included environmental tests on the transformer-output inverter. (Author)

Suelzle, L.R.; Suelzle, J.S.

1977-10-01T23:59:59.000Z

372

Exploiting level sensitive latches in wire pipelining  

E-Print Network (OSTI)

The present research presents procedures for exploitation of level sensitive latches in wire pipelining. The user gives a Steiner tree, having a signal source and set of destination or sinks, and the location in rectangular plane, capacitive load and required arrival time at each of the destinations. The user also defines a library of non-clocked (buffer) elements and clocked elements (flip-flop and latch), also known as synchronous elements. The first procedure performs concurrent repeater and synchronous element insertion in a bottom-up manner to find the minimum latency that may be achieved between the source and the destinations. The second procedure takes additional input (required latency) for each destination, derived from previous procedure, and finds the repeater and synchronous element assignments for all internal nodes of the Steiner tree, which minimize overall area used. These procedures utilize the latency and area advantages of latch based pipelining over flip-flop based pipelining. The second procedure suggests two methods to tackle the challenges that exist in a latch based design. The deferred delay padding technique is introduced, which removes the short path violations for latches with minimal extra cost.

Seth, Vikram

2004-12-01T23:59:59.000Z

373

CEBAF 200 kV Inverted Electron Gun  

Science Conference Proceedings (OSTI)

Two DC high volt­age GaAs pho­to­guns have been built at Jef­fer­son Lab based on a com­pact in­vert­ed in­su­la­tor de­sign. One pho­to­gun pro­vides the po­lar­ized elec­tron beam at CEBAF and op­er­ates at 130 kV bias volt­age. The other gun is used for high av­er­age cur­rent life­time stud­ies at a ded­i­cat­ed test fa­cil­i­ty and has been op­er­at­ed at bias volt­age up to 225 kV. The ad­van­tages of high­er DC volt­age for CEBAF in­clude re­duced space-charge emit­tance growth and the po­ten­tial for pro­longed pho­to­cath­ode life­time. How­ev­er, a con­se­quence of op­er­at­ing at high­er volt­ages is the in­creased like­li­hood of field emis­sion or break­down, both of which are un­ac­cept­able. High­lights of the R&D stud­ies lead­ing to­ward a pro­duc­tion 200keV GaAs pho­to­gun for CEBAF will be pre­sent­ed.

Grames, J M; Clark, J; Hansknecht, J; Poelker, M; Stutzman, M L; Suleiman, R; Surles-Law, K.E.L.; BastaniNejad, M

2011-03-01T23:59:59.000Z

374

An Updated Assessement of Copper Wire Thefts from Electric Utilities -  

NLE Websites -- All DOE Office Websites (Extended Search)

An Updated Assessement of Copper Wire Thefts from Electric An Updated Assessement of Copper Wire Thefts from Electric Utilities - October 2010 An Updated Assessement of Copper Wire Thefts from Electric Utilities - October 2010 The U.S. Department of Energy (DOE), Office of Electricity Delivery and Energy Reliability monitors changes, threats, and risks to the energy infrastructure in the United States. This report updates a previously published report on copper wire theft. The combined efforts of electric utilities, lawmakers, scrap metal dealers, and local law enforcement have succeeded in reducing the problem. Updated Assessment-Copper-Final October 2010.pdf More Documents & Publications Investigation Letter Report: I11IG002 Semiannual Report to Congress: for the first half of Fiscal Year (FY) 1998 Energy Infrastructure Events and Expansions Year-in-Review 2010

375

Building quantum wires: the long and the short of it  

Science Conference Proceedings (OSTI)

As quantum computing moves closer to reality the need for basic architectural studies becomes more pressing. Quantum wires, which transport quantum data, will be a fundamental component in all anticipated silicon quantum architectures. In this paper, ...

Mark Oskin; Frederic T. Chong; Isaac L. Chuang; John Kubiatowicz

2003-06-01T23:59:59.000Z

376

Alliant Energy (Wisconsin Power and Light) - Farm Wiring Financing Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Financing Financing Program Alliant Energy (Wisconsin Power and Light) - Farm Wiring Financing Program < Back Eligibility Agricultural Savings Category Other Appliances & Electronics Commercial Lighting Lighting Maximum Rebate $20,000 Program Info State Wisconsin Program Type Utility Loan Program Rebate Amount Varies Provider Alliant Energy Alliant Energy (Wisconsin Power and Light) offers a farm wiring financing program to increase farm safety, productivity and efficiency, while decreasing the potential for stray voltage on livestock farms. To start, Alliant Energy will inspect the facility for stray voltage and recommend improvements. Loans of up to $20,000 at 3% are available for wiring or efficiency equipment as part of this program. In addition to this program, Alliant-WP&L offers the Farm Wiring Grant

377

Ductile alloy and process for preparing composite superconducting wire  

DOE Patents (OSTI)

An alloy for the commercial production of ductile superconducting wire is prepared by melting together copper and at least 15 weight percent niobium under non-oxygen-contaminating conditions, and rapidly cooling the melt to form a ductile composite consisting of discrete, randomly distributed and orientated dendritic-shaped particles of niobium in a copper matrix. As the wire is worked, the dendritric particles are realigned parallel to the longitudinal axis and when drawn form a plurality of very fine ductile superconductors in a ductile copper matrix. The drawn wire may be tin coated and wound into magnets or the like before diffusing the tin into the wire to react with the niobium. Impurities such as aluminum or gallium may be added to improve upper critical field characteristics.

Verhoeven, John D. (Ames, IA); Finnemore, Douglas K. (Ames, IA); Gibson, Edwin D. (Ames, IA); Ostenson, Jerome E. (Ames, IA)

1983-03-29T23:59:59.000Z

378

Alliant Energy (Wisconsin Power and Light)- Farm Wiring Grant Program  

Energy.gov (U.S. Department of Energy (DOE))

Alliant Energy (Wisconsin Power & Light) offers a Farm Wiring Grant program to increase farm safety, productivity and efficiency. The first $1,000 of the cost of the project is covered by a...

379

Reliability of Wedge Wire Bonds Subjected to Ultrasonic Welding ...  

Science Conference Proceedings (OSTI)

This paper presents the effect of the ultrasonic welding lid attachment process on the reliability and mechanical strength of 1.0 and 1.5 mil gold wedge wire ...

380

Delivery optimization for a make to order custom wire mill  

E-Print Network (OSTI)

In the face of growing competition in the Tantalum business, H.C.Starck's management is minimizing the delivery time for custom-made capacitor-grade tantalum wire products. H.C. Starck, Inc., Newton, Massachusetts faces ...

Slivinskiy, Andrey L

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Closed form solutions to simultaneous buffer insertion/sizing and wire sizing  

Science Conference Proceedings (OSTI)

In this paper, we consider the delay minimization problem of an interconnect wire by simultaneously considering buffer insertion, buffer sizing and wire sizing. We consider three cases, namely using no buffer (i.e., wire sizing alone), using a given ... Keywords: buffer insertion, buffer sizing, closed form solution, interconnect optimization, wire sizing

Chris Chu; D. F. Wong

2001-07-01T23:59:59.000Z

382

Correlation of the electrical and space-time characteristics during electrical explosion of wires  

SciTech Connect

The electrical and space-time characteristics during electrical explosion of wires is studied. (AIP)

Litvinenko, V.P.; Koval' , S.V.

1983-04-01T23:59:59.000Z

383

Vietnam Education Foundation U.S. FACULTY SCHOLAR PROGRAM  

E-Print Network (OSTI)

Vietnam Education Foundation U.S. FACULTY SCHOLAR PROGRAM ***** CALL FOR PROPOSALS For the 2013 Cohort For Academic Year 2013-2014 #12;2 | P a g e U . S . F a c u l t y S c h o l a r P r o g r a m f o .......................................................................................... 14 14. Timeline for 2013 Cohort for AY 2013

Reisslein, Martin

384

Web Development and Design Foundations with XHTML, 5th edition  

Science Conference Proceedings (OSTI)

Using Hands-On Practice exercises and Web Site Case Studies to motivate readers, Web Development and Design Foundations with XHTML includes all the necessary lessons to guide students in developing highly effective Web sites. A well-rounded balance of ...

Terry Felke-Morris

2010-03-01T23:59:59.000Z

385

Foundation Heat Exchanger Model and Design Tool Development and Validation  

E-Print Network (OSTI)

. Feasibility of foundation heat exchangers in ground source heat pump systems in the United States. ASHRAE systems, with an estimated 1.7 million installed units with total installed heating capacity on the order Heat Exchangers for Residential Ground Source Heat Pump Systems - Numerical Modeling and Experimental

386

Exemplary documents: a foundation for information retrieval design  

E-Print Network (OSTI)

Exemplary documents: a foundation for information retrieval design David C. Blair a,*, Steven O 2002 Elsevier Science Ltd. All rights reserved. 1. Introduction Information, or document, retrieval retrieval systems are often rapidly Information Processing and Management 38 (2002) 363±379 www

Kimbrough, Steven Orla

387

Fan Foundation Systems--Analysis and Design Guidelines  

Science Conference Proceedings (OSTI)

Dynamic analysis is the most effective tool for determining the root causes of excessive fan vibration. This study demonstrated the importance of using such analysis in conjunction with a "total systems" approach that considers how the properties of all major fan system components, including foundation, piles, and soil conditions, contribute to vibration.

1986-08-19T23:59:59.000Z

388

Using a Foundational Ontology for Reengineering a Software Enterprise Ontology  

Science Conference Proceedings (OSTI)

The knowledge about software organizations is considerably relevant to software engineers. The use of a common vocabulary for representing the useful knowledge about software organizations involved in software projects is important for several reasons, ... Keywords: Enterprise Ontology, Foundational Ontology, Ontology Reengineering

Monalessa Perini Barcellos; Ricardo Almeida Falbo

2009-11-01T23:59:59.000Z

389

Coupled Site Characterization and Foundation Analysis Research Project  

E-Print Network (OSTI)

Coupled Site Characterization and Foundation Analysis Research Project: Further Research into the Rational Selection of for Bearing Capacity Analysis under Drained-Strength Conditions Manhattan College Research Report No. CE/GE-00-3 by John S. Horvath, Ph.D., P.E. Professor of Civil Engineering Manhattan

Horvath, John S.

390

Wire rope superconducting cable for diurnal load leveling SMES  

DOE Green Energy (OSTI)

The design of a wire rope cable for a superconducting magnetic energy storage (SMES) unit is discussed. The superconducting wires in the rope permit the passage of large currents in the relatively small conductors of the windings and hence cause large electromagnetic forces to act on the rope. The diameter of the rope, from a strength point of view, can be considerably reduced by supporting the rope at various points along its length.

Costello, G.A.

1980-01-01T23:59:59.000Z

391

Process for producing fine and ultrafine filament superconductor wire  

DOE Patents (OSTI)

A process for producing a superconductor wire made up of a large number of round monofilament rods is provided for, comprising assembling a multiplicity of round monofilaments inside each of a multiplicity of thin wall hexagonal tubes and then assembling a number of said thin wall hexagonal tubes within an extrusion can and subsequently consolidating, extruding and drawing the entire assembly down to the desired wire size.

Kanithi, Hem C. (15 Briar Ct., Chesire, CT 06410)

1992-01-01T23:59:59.000Z

392

Repeatability of measurements of residential magnetic fields and wire codes  

SciTech Connect

Several epidemiological studies have been based on wire codes (i.e., categories of electrical wiring configurations near residences) or on in-home spot measurements of magnetic flux density (MFD) as surrogates for short- and long-term exposure of children and adults to residential magnetic fields. We used wire code and MFD measurements that were made in 81 Colorado homes in 1985 and again in 1990 to assess their repeatability over periods of 0-24 h and 5 years. These homes, a subset of those lived in by subjects from the case-control study of Savitz et al. [Am J Epidemiol 128:21-38, 1988], were divided into four approximately equally sized groups that were differentiated by wire code and by case-control status. Eight homes were assigned wire codes in 1990 that differed from the 1985 coding of Savitz and colleagues [1988]; of these, seven were coded as high-current configuration (HCC) and one as low-current configuration (LCC) in 1985. Overall, 37 homes were coded as HCC in 1990 compared with 38 homes in 1985. Coding differences were due to differing distance measurements (four homes), differing thick vs. thin categorization of primary-distribution line-conductor sizes (two homes), differing first-span vs. second-span categorization of secondary wires (one home), and physical changes in proximate electrical wiring (one home). Coefficients of correlation between MFD spot measurements that were separated in time by 0-24 h range between 0.70 and 0.90. The coefficient between spot measurements made in 1985 and then again in 1990 is 0.70. These coefficients are similar for HCC and LCC homes and do not depend on whether residential appliances were turned on or off. The data show (at least for the portion of Colorado studied) that residential wire code and, more surprisingly, spot MFD measurements, are fairly reliable over 0-24-h and 5-year periods.

Dovan, T.; Kaune, W.T.; Savitz, D.A. (ENERTECH Consultants, Campbell, CA (United States))

1993-01-01T23:59:59.000Z

393

Process for producing fine and ultrafine filament superconductor wire  

DOE Patents (OSTI)

A process for producing a superconductor wire made up of a large number of round monofilament rods is provided for, comprising assembling a multiplicity of round monofilaments inside each of a multiplicity of thin wall hexagonal tubes and then assembling a number of said thin wall hexagonal tubes within an extrusion can and subsequently consolidating, extruding and drawing the entire assembly down to the desired wire size. 8 figs.

Kanithi, H.C.

1992-02-18T23:59:59.000Z

394

Method of fabricating a homogeneous wire of inter-metallic alloy  

DOE Patents (OSTI)

A method for fabricating a homogeneous wire of inter-metallic alloy comprising the steps of providing a base-metal wire bundle comprising a metal, an alloy or a combination thereof; working the wire bundle through at least one die to obtain a desired dimension and to form a precursor wire; and, controllably heating the precursor wire such that a portion of the wire will become liquid while simultaneously maintaining its desired shape, whereby substantial homogenization of the wire occurs in the liquid state and additional homogenization occurs in the solid state resulting in a homogenous alloy product.

Ohriner, Evan Keith (Knoxville, TN); Blue, Craig Alan (Knoxville, TN)

2001-01-01T23:59:59.000Z

395

Processing and mechanical behavior of hypereutectoid steel wires  

DOE Green Energy (OSTI)

Hypereutectoid steels have the potential for dramatically increasing the strength of wire used in tire cord and in other high strength wire applications. The basis for this possible breakthrough is the elimination of a brittle proeutectoid network that can form along grain boundaries if appropriate processing procedures and alloy additions are used. A review is made of work done by Japanese and other researchers on eutectoid and mildly hypereutectoid wires. A linear extrapolation of the tensile strength of fine wires predicts higher strengths at higher carbon contents. The influence of processing, alloy additions and carbon content in optimizing the strength, ductility and fracture behavior of hypereutectoid steels is presented. It is proposed that the tensile strength of pearlitic wires is dictated by the fracture strength of the carbide lamella at grain boundary locations in the carbide. Methods to improve the strength of carbide grain boundaries and to decrease the carbide plate thickness will contribute to enhancing the ultrahigh strength obtainable in hypereutectoid steel wires. 23 refs., 13 figs., 1 tab.

Lesuer, D.R.; Syn, C.K.; Sherby, O.D.; Kim, D.K.

1996-06-25T23:59:59.000Z

396

Diamond Wire Saw for Precision Machining of Laser Target Components  

SciTech Connect

The fabrication of precision laser targets requires a wide variety of specialized mesoscale manufacturing techniques. The diamond wire saw developed in this study provides the capability to precisely section meso-scale workpieces mounted on the assembly stations used by the Target Fabrication Group. This new capability greatly simplifies the fabrication of many types of targets and reduces the time and cost required to build the targets. A variety of materials are used to fabricate targets, including metals, plastics with custom designed chemical formulas, and aerogels of various densities. The materials are usually provided in the form of small pieces or cast rods that must be machined to the required shape. Many of these materials, such as metals and some plastics, can be trimmed using a parting tool on a diamond turning machine. However, other materials, such as aerogels and brittle materials, cannot be adequately cut with a parting tool. In addition, the geometry of the parts often requires that the workpieces be held in a special assembly station, which excludes the use of a parting tool. In the past, these materials were sectioned using a small, handheld coping saw that used a diamond-impregnated wire as a blade. This miniature coping saw was effective, but it required several hours to cut through certain materials. Furthermore, the saw was guided by hand and often caused significant damage to fragile aerogels. To solve these problems, the diamond wire saw shown in Figure 1 was developed. The diamond wire saw is designed to machine through materials that are mounted in the Target Fabrication Group's benchtop assembly stations. These assembly stations are the primary means of aligning and assembling target components, and there is often a need to machine materials while they are mounted in the assembly stations. Unfortunately, commercially available saws are designed for very different applications and are far too large to be used with the assembly stations. Therefore, a custom diamond wire saw was designed and constructed. The diamond wire saw cuts through workpieces using a continuous loop of diamond-impregnated wire of length 840 mm. The wire loop runs around several idler pulleys and is driven by a simple geared DC motor that rotates at 17 rpm. The linear speed of the wire is 107 inches/minute. The saw is oriented at an angle of 20{sup o} from horizontal, so the operator can view the wire through the cutout at the front end of the saw. When looking through a microscope or camera with a horizontal line of sight, the operator can clearly see the wire as it cuts through the workpiece, as shown in the right side of Figure 1. The saw is mounted on a two-axis stage that allows the operator to align the wire with the workpiece. To cut through the workpiece, the operator drives the wire through the workpiece by turning the feed micrometer. An image of the interior of the diamond wire saw appears in Figure 2. This picture was taken after removing the protective cover plate from the saw.

Bono, M J; Bennett, D W

2005-08-08T23:59:59.000Z

397

A Soft-Switching Inverter for High-Temperature Advanced Hybrid Electric Vehicle Traction Motor Drives  

Science Conference Proceedings (OSTI)

The state-of-the-art hybrid electric vehicles (HEVs) require the inverter cooling system to have a separate loop to avoid power semiconductor junction over temperatures because the engine coolant temperature of 105?C does not allow for much temperature rise in silicon devices. The proposed work is to develop an advanced soft-switching inverter that will eliminate the device switching loss and cut down the power loss so that the inverter can operate at high-temperature conditions while operating at high switching frequencies with small current ripple in low inductance based permanent magnet motors. The proposed tasks also include high-temperature packaging and thermal modeling and simulation to ensure the packaged module can operate at the desired temperature. The developed module will be integrated with the motor and vehicle controller for dynamometer and in-vehicle testing to prove its superiority. This report will describe the detailed technical design of the soft-switching inverters and their test results. The experiments were conducted both in module level for the module conduction and switching characteristics and in inverter level for its efficiency under inductive and dynamometer load conditions. The performance will be compared with the DOE original specification.

None, None

2012-01-31T23:59:59.000Z

398

Development of a dc-to-ac inverter based on waveshaping  

SciTech Connect

A new topology for utility-interactive, dc-ac inverters is explored. The approach is presently limited by available devices to the single-phase, 2 to 10 kW power levels typical of residential photovoltaic applications. The approach combines two of the three basic inverter operations - waveshaping and regulation - in a single dc-dc converter stage. The output of this stage is a full-wave rectified (unipolar) sine wave. An inversion stage follows, performing the third basic inverter operation. The output is a current sine wave. This approach features unity power factor and less than 2% total current harmonic distortion. A 1-kW prototype was constructed, using a buck (down) converter for the dc-dc stage switching at approximately 20 kHz. Efficiency was generally above 90% with a peak efficiency of 94%. A cost breakdown of the prototype indicated the inverter could be built to meet the DOE cost goals for this class of inverter.

Cox, C.H. III; Landsman, E.E.; Rasmussen, N.E.

1982-08-01T23:59:59.000Z

399

Proof of feasibility of a novel inverter for photovoltaic power conditioning  

SciTech Connect

The Dickerson inverter concept obtains a sinewave current from an array that is segmented into a number of subarrays. These subarrays are switched among the ac phases so that the current from a given subarray is continuous and each phase is connected at all times to one or more subarrays. The control scheme assures a unity power factor currrent with real-time adjustment to power-system disturbances. A proof-of-concept inverter has been operated into a three-phase power system, with the dc supplied from a motor-generator set plus regulators that closely simulated the current-voltage characteristics of a photovoltaic array. The performance for the inverter has been projected for a 480V, three-phase system at the 50 kVA level. Computer simulations showed 98% utilization of array power was possible with efficiency better than 98% and harmonic content of 18% without filtering. An analysis of filtering costs indicates that reduction to 5% can be achieved at under $0.003 per watt for typical central-station applications. A more complex configuration was also analyzed with results of 99% utilization, 8% harmonic content, and the same efficiency. The intended power range for these inverters is 50 to 250 kVA per unit. The cost to produce the inverter at the 50 kVA level in quantities of 1000 units is estimated to be $0.05 per watt.

Dickerson, A.

1986-04-01T23:59:59.000Z

400

Synthetic nanotubes lay foundation for new technology: Artificial pores  

NLE Websites -- All DOE Office Websites (Extended Search)

Synthetic nanotubes lay foundation for new technology: Artificial pores Synthetic nanotubes lay foundation for new technology: Artificial pores mimic key features of natural pores By Tona Kunz * July 17, 2012 Tweet EmailPrint Scientists have overcome key design hurdles to expand the potential uses of nanopores and nanotubes. The creation of smart nanotubes with selective mass transport opens up a wider range of applications for water purification, chemical separation and fighting disease. Nanopores and their rolled up version, nanotubes, consist of atoms bonded to each other in a hexagonal pattern to create an array of nanometer-scale openings or channels. This structure creates a filter that can be sized to select which molecules and ions pass into drinking water or into a cell. The same filter technique can limit the release of chemical by-products

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401

Foundation for Offshore Wind Energy | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Energy Offshore Wind Energy Jump to: navigation, search Name Foundation for Offshore Wind Energy Place Varel, Germany Zip D-26316 Sector Wind energy Product Foundation established to operate the 60MW Borkum West Offshore Wind Farm. Coordinates 53.393773°, 8.13759° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":53.393773,"lon":8.13759,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

402

Northern New Mexico College Foundation honors LANL's Richard Marquez with  

NLE Websites -- All DOE Office Websites (Extended Search)

Rich Marquez honored with leadership, service award Rich Marquez honored with leadership, service award LANL's Richard Marquez honored with leadership, service award Northern New Mexico College Foundation honors LANL's Richard Marquez. October 4, 2012 Rich Marquez Rich Marquez, LANL Executive Director Contact Steve Sandoval Communications Office (505) 665-9206 Email Barcelo said Marquez has "dedicated his career and personal life to the advancement of educational and economic opportunities for Northern New Mexico." Northern New Mexico College Foundation honors LANL's Richard Marquez with leadership, service award LOS ALAMOS, NEW MEXICO, October 5, 2012-Los Alamos National Laboratory Executive Director Richard Marquez is the namesake for a new leadership and service award at Northern New Mexico College (NNMC) in Española.

403

SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Foundational Program to Solar Foundational Program to Advance Cell Efficiency to someone by E-mail Share SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Facebook Tweet about SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Twitter Bookmark SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Google Bookmark SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Delicious Rank SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on Digg Find More places to share SunShot Initiative: Solar Foundational Program to Advance Cell Efficiency on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Competitive Awards Diversity in Science and Technology Advances National Clean Energy

404

Business Case Slide 3: DU Uses R&D Program Foundation  

NLE Websites -- All DOE Office Websites (Extended Search)

DU Uses R&D Program Foundation Previous Slide Next Slide Table of Contents DU Uses R&D Program Foundation Based on DU materials use "roadmap" developed by DOE and lab staff from...

405

U.S. Department of Energy and the Automotive X PRIZE Foundation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the Automotive X PRIZE Foundation to Promote Clean, Energy-Efficient Vehicles U.S. Department of Energy and the Automotive X PRIZE Foundation to Promote Clean, Energy-Efficient...

406

WPF Programmer's Reference: Windows Presentation Foundation with C# 2010 and .NET 4, 1st edition  

Science Conference Proceedings (OSTI)

Build effective user interfaces with Windows Presentation Foundation Windows Presentation Foundation (WPF) is included with the Windows operating system and provides a programming model for building applications that provide a clear separation between ...

Rod Stephens

2010-03-01T23:59:59.000Z

407

2012 SG Peer Review - Smart Inverter Controls and Microgrid Interoperation at DECC - Tom Rizy, ORNL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

g g Peer Review Meeting Smart Inverter Controls & Microgrid Interoperation at the Distributed Energy Communications & Controls (DECC) Lab ( ) D. Tom Rizy Oak Ridge National Laboratory (ORNL) June 7 th 2012 June 7 th , 2012 Smart Inverter (SI) Controls and Microgrid (MG) Interoperation Microgrid (MG) Interoperation Objectives * D l d SI l f l i l DECC Microgrid * Develop and test SI controls for multiple renewable/nonrenewable DER. * Develop MG controls and communication requirements for high penetration DER. * I l t MG t DECC L b Technical Scope * Implement MG at DECC Lab. * Transfer technology to industry. Life-cycle Funding Summary ($K) Prior to FY12 FY13 Out- Technical Scope * Develop advanced smart inverter control consisting of local droop (P-f, Q-V) control integrated with secondary closed

408

Japanese power electronics inverter technology and its impact on the American air conditioning industry  

SciTech Connect

Since 1983, technological advances and market growth of inverter- driven variable-speed heat pumps in Japan have been dramatic. The high level of market penetration was promoted by a combination of political, economic, and trade policies in Japan. A unique environment was created in which the leading domestic industries-- microprocessor manufacturing, compressors for air conditioning and refrigerators, and power electronic devices--were able to direct the development and market success of inverter-driven heat pumps. As a result, leading US variable-speed heat pump manufacturers should expect a challenge from the Japanese producers of power devices and microprocessors. Because of the vertically-integrated production structure in Japan, in contrast to the out-sourcing culture of the United States, price competition at the component level (such as inverters, sensors, and controls) may impact the structure of the industry more severely than final product sales. 54 refs., 47 figs., 1 tab.

Ushimaru, Kenji.

1990-08-01T23:59:59.000Z

409

Photovoltaic power system tests on an 8-kilowatt single-phase line-commutated inverter  

SciTech Connect

A commercially available single-phase line-commutated inverter has been tested in a photovoltaic power system. Efficiency and power factor were measured as functions of solar array voltage and current. Also, the effects of input shunt capacitance and series inductance were determined. Tests were conducted from 15 to 75 percent of the 8 kW rated inverter input power. Measured efficiencies ranged from 76 percent (at 160 V and 8.0 A) to 88 percent (at 200 V and 18.7 A) at about 50 percent of rated inverter input power. Power factor ranged from 36 percent (at 160 V and 8.0 A) to 72 percent (at 200 V and 28.6 A).

Stover, J.B.

1978-02-01T23:59:59.000Z

410

Optimum system design of a three-phase rectifier-inverter type of frequency changer  

SciTech Connect

Steadily decreasing prices and improved performance of semiconductor devices have raised expectations towards the development and large-scale application of motor-mounted static converters. In view of this, the design of a rectifier-inverter type of frequency changer which requires very small reactive components is considered. Accordingly, rectifier and inverter PWM schemes which generate the minimum possible harmonic distortion are first discussed. By using a suitable analysis method, ''optimum'' design data are obtained for every major system component. Resulting reactive component values are shown to be considerably smaller than the ones required by typical rectifier-inverter structures. Predicted key results are verified by computer simulation.

Ziogas, P.D.; Kang, Y-G.; Stefanovic, V.R.

1985-09-01T23:59:59.000Z

411

Multilevel DC Link Inverter for Brushless Permanent Magnet Motors with Very Low Inductance  

SciTech Connect

Due to their long effective air gaps, permanent magnet motors tend to have low inductance. The use of ironless stator structure in present high power PM motors (several tens of kWs) reduces the inductance even further (< 100 {micro}H). This low inductance imposes stringent current regulation demands for the inverter to obtain acceptable current ripple. An analysis of the current ripple for these low inductance brushless PM motors shows that a standard inverter with the most commonly used IGBT switching devices cannot meet the current regulation demands and will produce unacceptable current ripples due to the IGBT's limited switching frequency. This paper introduces a new multilevel dc link inverter, which can dramatically reduce the current ripple for brushless PM motor drives. The operating principle and design guidelines are included.

Su, G.J.

2001-10-29T23:59:59.000Z

412

Seasonal efficiencies of residential heat pump air conditioners with inverter-driven compressors  

SciTech Connect

This paper describes a study to experimentally determine the steady-state characteristics, cyclic effect, and frosting/defrosting effect of a inverter heat pump currently available on the Japanese market and compute its seasonal efficiency based on the local outdoor air temperature data. It has been found that the APF of this heat pump is higher by 15% than that of the conventional fixed-speed heat pump. If cyclic and frosting/defrosting losses are eliminated, the APF of the inverter heat pump will be further improved by 2% to 6%. For the evaluation of an inverter heat pump, APF alone is not sufficient, and an additional parameter such as an annual comfort factor (ACF) is needed.

Hori, M.; Akamine, I.; Sakai, T.

1985-01-01T23:59:59.000Z

413

Time and Entropy in the Foundations of Mechanics  

E-Print Network (OSTI)

This contribution analyses the classical laws of motion by means of an approach relating time and entropy. We argue that adopting the notion of change of states as opposed to the usual derivation of Newton's laws in terms of fields a broader picture is obtained, suggesting that diverse branches of physics- classical, quantum, relativistic and statistical mechanics - turn out to be related by a common foundation.

R Assumpcao

2007-06-17T23:59:59.000Z

414

Extrusion of metal oxide superconducting wire, tube or ribbon  

DOE Patents (OSTI)

A process and apparatus for extruding a superconducting metal oxide composition YBa{sub 2}Cu{sub 3}O{sub 7-x} provides a wire (tube or ribbon) having a cohesive mass and a degree of flexibility together with enhanced electrical properties. Wire diameters in the range of 6--85 mils have been produced with smaller wires on the order of 10 mils in diameter exhibiting enhanced flexibility for forming braided, or multistrand, configurations for greater current carrying capacity. The composition for extrusion contains a polymeric binder to provide a cohesive mass to bind the particles together during the extrusion process with the binder subsequently removed at lower temperatures during sintering. The composition for extrusion further includes a deflocculent, an organic plasticizer and a solvent which also are subsequently removed during sintering. Electrically conductive tubing with an inner diameter of 52 mil and an outer diameter of 87--335 mil has also been produced. Flat ribbons have been produced in the range of 10--125 mil thick by 100--500 mil wide. The superconducting wire, tube or ribbon may include an outer ceramic insulating sheath co-extruded with the wire, tubing or ribbon.

Dusek, J.T.

1990-01-01T23:59:59.000Z

415

Extrusion of metal oxide superconducting wire, tube or ribbon  

DOE Patents (OSTI)

A process for extruding a superconducting metal oxide composition YBa.sub.2 Cu.sub.3 O.sub.7-x provides a wire (tube or ribbon) having a cohesive mass and a degree of flexibility together with enhanced electrical properties. Wire diameters in the range of 6-85 mils have been produced with smaller wires on the order of 10 mils in diameter exhibiting enhanced flexibility for forming braided, or multistrand, configurations for greater current carrying capacity. The composition for extrusion contains a polymeric binder to provide a cohesive mass to bind the particles together during the extrusion process with the binder subsequently removed at lower temperatures during sintering. The composition for extrusion further includes a deflocculent, an organic plasticizer and a solvent which also are subsequently removed during sintering. Electrically conductive tubing with an inner diameter of 52 mil and an outer diameter of 87-355 mil has also been produced. Flat ribbons have been produced in the range of 10-125 mil thick by 100-500 mil wide. The superconducting wire, tube or ribbon may include an outer ceramic insulating sheath co-extruded with the wire, tubing or ribbon.

Dusek, Joseph T. (Lombard, IL)

1993-01-01T23:59:59.000Z

416

First Measurements and Results With a Stretched Wire Test Setup  

Science Conference Proceedings (OSTI)

The LINAC Coherent Light Source [LCLS] is a free electron laser, designed to produce high brilliant X-ray beams using Self Amplified Spontaneous Emission [SASE]. Due to the physics of SASE, the electron beam has to be held very precisely on the same trajectory as the X-ray light beam generated by the undulator magnets. To optimize the SASE output, trajectory deviations between both beams have to be minimized to a few micrometers along the entire undulator section and held stable over the time period between beam-based-alignment processes. Consequently, extremely high position stability of all magnets in the undulator section is required to operate the LCLS successfully. The knowledge of any magnet movement exceeding few micrometers during periods of several weeks is essential for efficient X-ray generation. A well known principle of monitoring transverse component positions along beam lines is the application of stretched wires, associated with suitable wire position sensors and electronics. The particular challenge at LCLS is the required wire system performance in conjunction with the length of the undulator section and the large number of monitors. Verification of system stability and resolution under real conditions is the primary goal of this test setup. A stretched wire test setup has been implemented to gain experience for the final design of a wire system, which will meet the position monitoring requirements in the LCLS undulator section. The report briefly introduces the system's architecture and describes first measurements and results.

Peters, Franz

2010-12-13T23:59:59.000Z

417

Agelidis, “Inverter for Single-Phase Grid Connected Photovoltaic Systems – An Overview,” Power Electron  

E-Print Network (OSTI)

Abstract- An overview on recent developments and a summary of the state-of-the-art of inverter technology in Europe for single-phase grid-connected Photovoltaic (PV) systems for power levels up to 5 kW is provided in this paper. The information includes details not only on the topologies commercially available but also on the switching devices employed and the associated switching frequencies, efficiency, price trends and market share. Finally, the paper outlines issues associated with the development of relevant international industry standards affecting PV inverter technology. I.

Martina Calais; Johanna Myrzik; Ted Spoone; Vassilios G. Agelidis

2002-01-01T23:59:59.000Z

418

Next-generation three-phase inverters. Phase one annual report, 1996  

DOE Green Energy (OSTI)

The PV-MaT 4A subcontract addresses the cost effective manufacture of PV related end-products. Advanced Energy Systems Inc. (AES Inc.) has undertaken NREL contract No. ZAF-4-14271-10, {open_quotes}Next Generation Three Phase Inverter{close_quotes}, to combine leading industry skill with state-of-the-art technologies to realize cutting-edge PV inverter related products. To this end, in phase one of the PV-MaT contract, AES Inc. has made significant inroads toward establishing low cost manufacture of an intelligent controller PV-hybrid product.

Wesley, A.; Wills, R. [Advanced Energy Systems Inc., Wilton, NH (United States)

1997-07-01T23:59:59.000Z

419

Testing and Development of a 30-kVA Hybrid Inverter: Lessons Learned and Reliability Implications  

SciTech Connect

A 30-kVA Trace Technologies hybrid power processor was specified and tested at the Sandia inverter test facility. Trace Technologies involving the control system, in response to suggestions made modifications, primarily by Sandia and Arizona Public Service (APS) personnel. The modifications should make the inverter more universally applicable and less site-specific so that it can be applied in various sites with minimal field interaction required from the design engineer. The project emphasized the importance of battery management, generator selection, and site load management to the performance and reliability of hybrid power systems.

Ginn, J.W.

1998-12-21T23:59:59.000Z

420

A PWM method for reduction of switching loss in a full-bridge inverter  

SciTech Connect

This paper presents the ``hybrid pulsewidth modulation`` (HPWM) method which requires only two of the four switches in a full-bridge inverter to be pulsewidth-modulated at high frequency, thus significantly reducing the switching losses in the other two switches. For triangular carriers, HPWM has the same frequency spectrum and switching losses as the conventional unipolar PM (UPWM). A low-frequency model for a fast-switching HPWM full-bridge inverter with high-quality output is described, and is substantiated by experimental data.

Lai, R.S.; Ngo, K.D.T. [Univ. of Florida, Gainesville, FL (United States). Dept. of Electrical Engineering

1995-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Towards ontological foundations for agent modelling concepts using the unified fundational ontology (UFO)  

Science Conference Proceedings (OSTI)

Foundational ontologies provide the basic concepts upon which any domain-specific ontology is built. This paper presents a new foundational ontology, UFO, and shows how it can be used as a foundation of agent concepts and for evaluating agent-oriented ...

Giancarlo Guizzardi; Gerd Wagner

2004-06-01T23:59:59.000Z

422

Cold Climate Foundation Retrofit Energy Savings: The Simulated Energy and Experimental Hygrothermal Performance of Cold Climate Foundation Wall Insulation Retrofit Measures -- Phase I, Energy Simulation  

SciTech Connect

A split simulation whole building energy/3-dimensional earth contact model (termed the BUFETS/EnergyPlus Model or BEM) capable of modeling the full range of foundation systems found in the target retrofit housing stock has been extensively tested. These foundation systems that include abovegrade foundation walls, diabatic floors or slabs as well as lookout or walkout walls, currently cannot be modeled within BEopt.

Goldberg, L. F.; Steigauf, B.

2013-04-01T23:59:59.000Z

423

Analysis of Compact Cylindrical Wire Array Implosions with Brass and also by Alternating Brass and Al wires on the 1-MA COBRA Generator  

SciTech Connect

Implosions from compact cylindrical wire arrays (CCWA) with mid-Z and low-Z wires were carried out on the 1-MA COBRA generator at Cornell University. In particular, the CCWA used either Brass 310 (70% Cu, 30% Zn) wires or a combination of Brass 310 and Al 5056 (95% Al, 5% Mg) wires arranged in an alternating pattern. A total of 16 wires were used on either a 6 or 4 mm diameter array. The diagnostic suite included a bolometer, fast x-ray detectors, a time-integrated spectrometer, and a streak camera. A higher energy output was observed from bolometer measurements when alternating the brass and Al wires compared to using only the brass wires. This study will focus mainly on the spectroscopy of the brass and alternating brass and Al CCWA by applying the non-LTE kinetic models of Cu and Zn to account for the L-shell radiation. The resulting plasma parameters, electron density and electron temperature, will be discussed and compared for the CCWA with only brass wires and alternating brass and Al wires. The simulations with the novel Wire Ablation Dynamics Model that account for wire ablation will be performed to analyze the differences in implosion dynamics of the uniform and alternating compact cylindrical arrays.

Ouart, N. D.; Yilmaz, M. F.; Safronova, A. S.; Kantsyrev, V. L.; Esaulov, A. A.; Williamson, K. M.; Osborne, G. C.; Shrestha, I.; Weller, M. E. [Physics Department, University of Nevada, Reno, NV 89557 (United States); McBride, R. D.; Knapp, P. F.; Bell, K. S.; Pikuz, S. A.; Shelkovenko, T. A.; Greenly, J. B.; Hammer, D. A.; Kusse, B. R. [Cornell University, Ithaca, NY 14853 (United States)

2009-01-21T23:59:59.000Z

424

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Wednesday, 21 December 2005 00:00 Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

425

Annual Coded Wire Program Missing Production Groups, 1996 Annual Report.  

DOE Green Energy (OSTI)

In 1989 the Bonneville Power Administration (BPA) began funding the evaluation of production groups of juvenile anadromous fish not being coded-wire tagged for other programs. These groups were the ``Missing Production Groups``. Production fish released by the US Fish and Wildlife Service (USFWS) without representative coded-wire tags during the 1980`s are indicated as blank spaces on the survival graphs in this report. The objectives of the ``Missing Production Groups`` program are: to estimate the total survival of each production group, to estimate the contribution of each production group to various fisheries, and to prepare an annual report for all USFWS hatcheries in the Columbia River basin. Coded-wire tag recovery information will be used to evaluate the relative success of individual brood stocks. This information can also be used by salmon harvest managers to develop plans to allow the harvest of excess hatchery fish while protecting threatened, endangered, or other stocks of concern.

Pastor, S.M. [Fish and Wildlife Service, Vancouver, WA (United States). Columbia River Fisheries Program Office

1997-07-01T23:59:59.000Z

426

Wired World-Wide Web Interactive Remote Event Display  

Science Conference Proceedings (OSTI)

WIRED (World-Wide Web Interactive Remote Event Display) is a framework, written in the Java{trademark} language, for building High Energy Physics event displays. An event display based on the WIRED framework enables users of a HEP collaboration to visualize and analyze events remotely using ordinary WWW browsers, on any type of machine. In addition, event displays using WIRED may provide the general public with access to the research of high energy physics. The recent introduction of the object-oriented Java{trademark} language enables the transfer of machine independent code across the Internet, to be safely executed by a Java enhanced WWW browser. We have employed this technology to create a remote event display in WWW. The combined Java-WWW technology hence assures a world wide availability of such an event display, an always up-to-date program and a platform independent implementation, which is easy to use and to install.

De Groot, Nicolo

2003-05-07T23:59:59.000Z

427

Strongly coupled copper plasma generated by underwater electrical wire explosion  

Science Conference Proceedings (OSTI)

A number of theoretical approaches to the analysis of the parameters of a discharge channel consisting of strongly coupled plasma generated in the process of underwater electrical wire explosion are presented. The analysis is based on experimental results obtained from discharges employing Cu wire. The obtained experimental data included electrical measurements and optical observations from which information about the dynamics of the water flow was extrapolated. Numerical calculation based on a 1D magnetohydrodynamic model was used to simulate the process of underwater wire explosion. A wide range conductivity model was applied in this calculation and good agreement with a set of experimental data was obtained. A method of determining the average temperature of the discharge channel based on this model and experimental results is proposed, and the limits of this method's applicability are discussed.

Grinenko, A.; Gurovich, V.Tz.; Saypin, A.; Efimov, S.; Krasik, Ya.E.; Oreshkin, V.I. [Physics Department, Technion, 32000 Haifa (Israel); Institute of High Current Electronics, SB RAN, 634055 Tomsk (Russian Federation)

2005-12-15T23:59:59.000Z

428

Modeling and simulation of a single phase photovoltaic inverter and investigation of switching strategies for harmonic minimization  

Science Conference Proceedings (OSTI)

The aim of this paper is to build an EMTDC model of a single phase photovoltaic inverter and to investigate switching strategies for harmonic minimisation. For the simulation of this model, the PSCAD/EMTDC software package was used and the waveforms ... Keywords: EMTDC model, harmonic minimization, single-phase photovoltaic inverter

St. Kourtesi; L. Ekonomou; A. Nakulas; G. P. Fotis; E. Zoulias

2007-05-01T23:59:59.000Z

429

A three-level buck converter to regulate a high-voltage DC-to-AC inverter  

E-Print Network (OSTI)

A three-level buck converter is designed and analyzed, and shown to be suitable as a high-voltage down converter as a pre-regulation stage for a 600 watt DC-to-AC power inverter. Topology selection for the inverter is ...

Schrock, Kenneth C

2008-01-01T23:59:59.000Z

430

DC-AC Cascaded H-Bridge Multilevel Boost Inverter With No Inductors for Electric/Hybrid Electric Vehicle Applications  

SciTech Connect

This paper presents a cascaded H-bridge multilevel boost inverter for electric vehicle (EV) and hybrid EV (HEV) applications implemented without the use of inductors. Currently available power inverter systems for HEVs use a dc-dc boost converter to boost the battery voltage for a traditional three-phase inverter. The present HEV traction drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. A cascaded H-bridge multilevel boost inverter design for EV and HEV applications implemented without the use of inductors is proposed in this paper. Traditionally, each H-bridge needs a dc power supply. The proposed design uses a standard three-leg inverter (one leg for each phase) and an H-bridge in series with each inverter leg which uses a capacitor as the dc power source. A fundamental switching scheme is used to do modulation control and to produce a five-level phase voltage. Experiments show that the proposed dc-ac cascaded H-bridge multilevel boost inverter can output a boosted ac voltage without the use of inductors.

Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Du, Zhong [ORNL; Chiasson, John N [ORNL

2009-01-01T23:59:59.000Z

431

Advanced, High-Reliability, System-Integrated 500kW PV Inverter Development: Final Subcontract Report, 29 September 2005 - 31 May 2008  

DOE Green Energy (OSTI)

Xantrex Technology accomplished subcontract goals of reducing parts cost, weight, and size of its 500-kW inverter by 25% compared to state-of-the-art PV inverters, while extending reliability by 25%.

West, R.

2008-08-01T23:59:59.000Z

432

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming  

E-Print Network (OSTI)

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming interconnection strate- gies. The resulting microgrid concept allows sub-networks of sources and loads to maintain to a microgrid, explores controller behaviour. The investigation considers disconnection from the main grid

Hiskens, Ian A.

433

Late miocene/pliocene origin of the inverted metamorphism of the Central Himalaya  

SciTech Connect

The spatial association of intracontinental thrusting and inverted metamorphism, recognized in the Himalaya more than a century ago, has inspired continuing efforts to identify their causal relationship. Perhaps the best known sequence of inverted metamorphism is that found immediately beneath the Himalayan Main Central Thrust (MCT), generally thought to have been active during the Early Miocene. It has been widely assumed that the pattern of inverted metamorphism also developed at that time. Using a new approach, in situ Th-Pb dating of monazite included in garnet, we have discovered that the peak metamorphic recrystallization recorded in the footwall of the MCT fault occurred at ca. 5 Ma. The apparent inverted metamorphism resulted from activation of a broad shear zone beneath the MCT zone which juxtaposed two right-way-up metamorphic sequences. Recognition of this remarkably youthful phase of metamorphism resolves outstanding problems in Himalayan tectonics, such as why the MCT (and not the more recently initiated thrusts) marks the break in slope of the present day mountain range, and transcends others, such as the need for exceptional conditions to explain Himalayan anatexis.

Harrison, T.M.; Ryerson, F.J.; LeFort, P.; Yin, A. Lovera, O.M.

1997-01-01T23:59:59.000Z

434

Modeling the overshooting effect for CMOS inverter delay analysis in nanometer technologies  

Science Conference Proceedings (OSTI)

With the scaling of complementary metal-oxide-semiconductor (CMOS) technology into the nanometer regime, the overshooting effect due to the input-to-output coupling capacitance has more significant influence on CMOS gate analysis, especially on CMOS ... Keywords: CMOS inverter, gate delay, nanometer technology, overshooting time, switch-resistor model, timing analysis

Zhangcai Huang; Atsushi Kurokawa; Masanori Hashimoto; Takashi Sato; Minglu Jiang; Yasuaki Inoue

2010-02-01T23:59:59.000Z

435

Dynamic Model Validation of PV Inverters under Short-Circuit Conditions  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) modules have dramatically decreased in price in the past few years, spurring the expansion of PV deployment. Residential and commercial rooftop installations are connected to the distribution network, large-scale installation PV power ... Keywords: photovoltaic, PV, dynamic model, validation, solar PV inverter, renewables

E. Muljadi, M. Singh, R. Bravo, V. Gevorgian

2013-04-01T23:59:59.000Z

436

Optimal Inverter VAR Control in Distribution Systems with High PV Penetration  

E-Print Network (OSTI)

The intent of the study detailed in this paper is to demonstrate the benefits of inverter var control on a fast timescale to mitigate rapid and large voltage fluctuations due to the high penetration of photovoltaic generation and the resulting reverse power flow. Our approach is to formulate the volt/var control as a radial optimal power flow (OPF) problem to minimize line losses and energy consumption, subject to constraints on voltage magnitudes. An efficient solution to the radial OPF problem is presented and used to study the structure of optimal inverter var injection and the net benefits, taking into account the additional cost of inverter losses when operating at non-unity power factor. This paper will illustrate how, depending on the circuit topology and its loading condition, the inverter's optimal reactive power injection is not necessarily monotone with respect to their real power output. The results are demonstrated on a distribution feeder on the Southern California Edison system that has a very ...

Farivar, Masoud; Clarke, Christopher; Low, Steven

2011-01-01T23:59:59.000Z

437

DC-AC Inverters for Static Condenser and Dynamic Voltage Restorer Applications  

Science Conference Proceedings (OSTI)

There has been significant recent interest in general classes of power electronic-based active power conditioners such as static condensers and dynamic voltage restorers. These systems are discussed in this paper with a focus on the inverter output stage. ... Keywords: Power Quality, Static var Compensators, Custom Power

Steven R. Ashcraft; S. Mark Halpin

1996-03-01T23:59:59.000Z

438

Fundamental Frequency Switching Control of Seven-Level Hybrid Cascaded H-bridge Multilevel Inverter  

Science Conference Proceedings (OSTI)

This paper presents a cascaded H-bridge multilevel inverter that can be implemented using only a single dc power source and capacitors. Standard cascaded multilevel inverters require n dc sources for 2n + 1 levels. Without requiring transformers, the scheme proposed here allows the use of a single dc power source (e.g., a battery or a fuel cell stack) with the remaining n-1 dc sources being capacitors, which is referred to as hybrid cascaded H-bridge multilevel inverter (HCMLI) in this paper. It is shown that the inverter can simultaneously maintain the dc voltage level of the capacitors and choose a fundamental frequency switching pattern to produce a nearly sinusoidal output. HCMLI using only a single dc source for each phase is promising for high-power motor drive applications as it significantly decreases the number of required dc power supplies, provides high-quality output power due to its high number of output levels, and results in high conversion efficiency and low thermal stress as it uses a fundamental frequency switching scheme. This paper mainly discusses control of seven-level HCMLI with fundamental frequency switching control and how its modulation index range can be extended using triplen harmonic compensation.

Du, Zhong [ORNL; Chiasson, John N [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL

2009-01-01T23:59:59.000Z

439

Multilevel Cascade H-bridge Inverter DC Voltage Estimation Through Output Voltage Sensing  

E-Print Network (OSTI)

- level inverters with symmetric supply," in Proc. 35th IEEE Power Electronics Specialists Conference, vol Knoxville,USA ffilho@utk.edu, tolbert@utk.edu Burak Ozpineci Energy & Transportation Science Division Oak total harmonic distortion), and have less switching losses. However, they need more components, driver

Tolbert, Leon M.

440

Conditions for the invertibility of the isoparametric mapping for hexahedral finite elements  

Science Conference Proceedings (OSTI)

We consider the isoparametric mapping, which maps a given reference element onto a global element given by its vertices, for trilinear finite elements on hexahedra. We present an algorithm that checks the positivity of the Jacobian determinant depending ... Keywords: hexahedral finite elements, invertibility, isoparametric mapping

P. Knabner; S. Korotov; G. Summ

2003-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Improving tide-gauge data processing: A method involving tidal frequencies and inverted barometer effect  

Science Conference Proceedings (OSTI)

Sea level measured at tide-gauge stations is affected by undesired events such as spikes, gaps, steps and time shifts. The presence of these instrumental failures seriously decreases the quality of each analysis done using the record. Furthermore, they ... Keywords: Data processing, Inverted barometer effect, Ocean tides, Sea-level changes, Tide-gauge observations

E. Gil; C. de Toro

2005-10-01T23:59:59.000Z

442

On the invertibility of the XOR rotations of a binary word  

E-Print Network (OSTI)

We prove the following result regarding operations on a binary word whose length is a power of two: computing the exclusive-or of a number of rotated versions of the word is an invertible (one-to-one) operation if and only ...

Rivest, Ronald L.

443

CANDLE BURNING IN AN INVERTED JAR OVER WATER IN A TROUGH EXPERIMENT: SCIENCE TEACHERS' CONCEPTIONS  

E-Print Network (OSTI)

CANDLE BURNING IN AN INVERTED JAR OVER WATER IN A TROUGH EXPERIMENT: SCIENCE TEACHERS' CONCEPTIONS contains about 20% oxygen despite our knowledge that burning in a closed environment does not consume during burning of carbon in oxygen (air) and the solubility rate of carbon dioxide in water

Knill, Oliver

444

Common Mode Voltage in case of Transformerless PV Inverters Connected to the Grid  

E-Print Network (OSTI)

through the parasitic capacitance of the PV panels, can reach very high values. A common-mode model based grid connected PV system with the modeled parasitic capacitances, marked with grey lines, presentCommon Mode Voltage in case of Transformerless PV Inverters Connected to the Grid T. KEREKES* R

Kerekes, Tamas

445

Economical design of gate-commutated inverters for the grid-tied distributed generators  

Science Conference Proceedings (OSTI)

The cost-effectiveness of small distributed generating resources is vital to the success of the high penetration of distributed generators within the microgrid concept. A common mechanism is the use of highly efficient inverters following the electrical storage systems. In this paper

Mujahidul Islam; Adedamola Omole; Arif Islam; Alexander Domijan Jr.

2011-01-01T23:59:59.000Z

446

The Control Strategy Based on Improved Droop Method of Microgrid-Connected Inverters  

Science Conference Proceedings (OSTI)

A control strategy of inverters is proposed based on the control requirements of the distributed power sources in the microgrid, which realizes the seamless transition between the grid-connected mode and islanding mode. When the microgrid is connected ... Keywords: improved droop method, tranditional droop method, PQ control, V/f control

Sha Tian; Xiangqian Tong; Biying Ren

2010-06-01T23:59:59.000Z

447

Using the Inverted Echo Sounder to Measure Vertical Profiles of Gulf Stream Temperature and Geostrophic Velocity  

Science Conference Proceedings (OSTI)

The methodology for converting the travel time measurement of the inverted echo sounder (IES) into an amplitude of the first baroclinic dynamical mode, A1, is presented. For a Gulf Stream IES record the so-generated A1(t) time series is used to ...

Robert S. Pickart; D. Randolph Watts

1990-02-01T23:59:59.000Z

448

Early Swedish Contribution to Oceanography: Nils Gissler (1715–71) and the Inverted Barometer Effect  

Science Conference Proceedings (OSTI)

Nils Gissler (1715–71) was a remarkable Swedish scientist and physician who appears to be the first to describe the inverted barometer effect, based on joint observations of sea level and atmospheric pressure at Härnösand, a small town on the ...

Gunnar I. Roden; H. Thomas Rossby

1999-04-01T23:59:59.000Z

449

Observations of Inertia-Gravity Waves in the Atlantic from Inverted Echo Sounders during FGGE  

Science Conference Proceedings (OSTI)

The study is based on observations from inverted echo sounders anchored near the equator in the western Atlantic Ocean. It appears to be a good method of detecting inertia-gravity waves with large vertical scale. The spectral analysis of the ...

Silvia Garzoli; Eli Joel Katz

1981-11-01T23:59:59.000Z

450

FPGA Implementation of Space Vector PWM Technique for Voltage Source Inverter Fed Induction Motor Drive  

Science Conference Proceedings (OSTI)

This paper presents implementation of Space Vector Pulse Width Modulation (SVPWM) technique for three phase Voltage Source Inverter (VSI) using Field Programmable Gate Array (FPGA). Variable voltage and frequency supply to ac drives is invariably obtained ... Keywords: VSI, SVPWM, FPGA, Induction Motor

R. Rajendran; N. Devarajan

2009-12-01T23:59:59.000Z

451

Florida Solar Energy Research and Education Foundation FlaSEREF | Open  

Open Energy Info (EERE)

and Education Foundation FlaSEREF and Education Foundation FlaSEREF Jump to: navigation, search Name Florida Solar Energy Research and Education Foundation (FlaSEREF) Place Florida Zip 34429 Sector Solar Product A non-profit organisation formed to foster the knowledge and use of solar energy in Florida. References Florida Solar Energy Research and Education Foundation (FlaSEREF)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Florida Solar Energy Research and Education Foundation (FlaSEREF) is a company located in Florida . References ↑ "Florida Solar Energy Research and Education Foundation (FlaSEREF)" Retrieved from "http://en.openei.org/w/index.php?title=Florida_Solar_Energy_Research_and_Education_Foundation_FlaSEREF&oldid=345426

452

RELIABILITY BASED DESIGN OF FIXED FOUNDATION WIND TURBINES  

SciTech Connect

Recent analysis of offshore wind turbine foundations using both applicable API and IEC standards show that the total load demand from wind and waves is greatest in wave driven storms. Further, analysis of overturning moment loads (OTM) reveal that impact forces exerted by breaking waves are the largest contributor to OTM in big storms at wind speeds above the operating range of 25 m/s. Currently, no codes or standards for offshore wind power generators have been adopted by the Bureau of Ocean Energy Management Regulation and Enforcement (BOEMRE) for use on the Outer Continental Shelf (OCS). Current design methods based on allowable stress design (ASD) incorporate the uncertainty in the variation of loads transferred to the foundation and geotechnical capacity of the soil and rock to support the loads is incorporated into a factor of safety. Sources of uncertainty include spatial and temporal variation of engineering properties, reliability of property measurements applicability and sufficiency of sampling and testing methods, modeling errors, and variability of estimated load predictions. In ASD these sources of variability are generally given qualitative rather than quantitative consideration. The IEC 61400‐3 design standard for offshore wind turbines is based on ASD methods. Load and resistance factor design (LRFD) methods are being increasingly used in the design of structures. Uncertainties such as those listed above can be included quantitatively into the LRFD process. In LRFD load factors and resistance factors are statistically based. This type of analysis recognizes that there is always some probability of failure and enables the probability of failure to be quantified. This paper presents an integrated approach consisting of field observations and numerical simulation to establish the distribution of loads from breaking waves to support the LRFD of fixed offshore foundations.

Nichols, R.

2013-10-14T23:59:59.000Z

453

Finite Element Simulation of Residual Stresses in Thermo-coupled Wire Drawing Process  

Science Conference Proceedings (OSTI)

The objective of this paper is to calculate residual stress in drawn wire taking into account induced temperature due to plastic dissipation energy. Finite element analysis (FEA) for the simulation of wire drawing is applied. The general purpose FEA ...

R. Iankov; A. Van Bael; P. Van Houtte

2000-06-01T23:59:59.000Z

454

The Effect of Prongs in the Measurement of Atmospheric Turbulence with Fine-Wire Resistance Transducers  

Science Conference Proceedings (OSTI)

The response of the fine-wire resistance temperature transducer was analyzed including the effects of (i) conducive heat transfer between wire and the supporting prong and (ii) a thermal boundary layer, which can form around the prongs especially ...

V. P. Singh; F. Eaton; R. Rubio

1992-04-01T23:59:59.000Z

455

THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED HEAT...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED HEAT AND POWER FACILITIES THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED HEAT AND POWER FACILITIES Section...

456

STUDY OF THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

STUDY OF THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED HEAT AND POWER FACILITIE STUDY OF THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED HEAT AND POWER...

457

Bohmian Trajectories as the Foundation of Quantum Mechanics  

E-Print Network (OSTI)

Bohmian trajectories have been used for various purposes, including the numerical simulation of the time-dependent Schroedinger equation and the visualization of time-dependent wave functions. We review the purpose they were invented for: to serve as the foundation of quantum mechanics, i.e., to explain quantum mechanics in terms of a theory that is free of paradoxes and allows an understanding that is as clear as that of classical mechanics. Indeed, they succeed in serving that purpose in the context of a theory known as Bohmian mechanics, to which this article is an introduction.

Sheldon Goldstein; Roderich Tumulka; Nino Zanghi

2009-12-14T23:59:59.000Z

458

First Test Results of the New LANSCE Wire Scanner  

SciTech Connect

The Beam Diagnostics and Instrumentation Team (BDIT) at Los Alamos National Laboratory's LANSCE facility is presently developing a new and improved wire scanner diagnostics system controlled by National Instrument's cRIO platform. This paper describes the current state of development of the control system along with the results gathered from the latest actuator motion performance and accelerator-beam data acquisition tests.

Sedillo, James Daniel [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

459

Leaching Studies for Metals Recovery from Waste Printed Wiring ...  

Science Conference Proceedings (OSTI)

Presentation Title, Leaching Studies for Metals Recovery from Waste Printed Wiring ... of the Chemical Changes and Surface Properties of Carbonated Waste Cement ... Flux for Basic Oxygen Steel Making Using Waste Oxides of Steel Plant ... Heat Treatment of Black Dross for the Production of a Value Added Material - A

460

A Laser-Wire System at the ATF Extraction Line  

Science Conference Proceedings (OSTI)

A new laser-wire (LW) system has been installed at the ATF extraction line at KEK, Tsukuba. The system aims at a micron-scale laser spot size and employs a mode-locked laser system. The purpose-built interaction chamber, light delivery optics, and lens systems are described, and the first results are presented.

Boogert, S.T.; Blair, G.; Boorman, G.; Bosco, A.; Deacon, L.; Driouichi, C.; Karataev, P.; /Royal Holloway, U. of London; Kamps, T.; /BESSY, Berlin; Delerue, N.; Dixit, S.; Foster, B.; Gannaway, F.; Howell, D.F.; Qureshi, M.; Reichold, A.; Senanayake, R.; /Oxford U.; Aryshev, A.; Hayano, H.; Kubo, K.; Terunuma, N.; Urakawa, J.; /KEK, Tsukuba /Liverpool U. /Cockcroft Inst. Accel. Sci. Tech. /SLAC

2007-02-12T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Optimizing the panel area of a photovoltaic system in relation to the static inverter - practical results  

Science Conference Proceedings (OSTI)

Due to poor sizing grid-connected photovoltaic systems often underexploit the capacity of the static inverter resulting in reduced efficiency and an increase in the cost of energy. The objectives of the present project are: to show the effects of an oversized solar module area on the efficiency and profitability of a system, and to define the conditions required for oversizing. The simulations performed in a previous phase of the project showed that higher profitability was attained with the power of the photovoltaic field area sized between 40 and 80% (depending on the conditions) above the nominal power of the static inverter. The validation of these results was obtained from two sites: Herdern (near Zurich/Switzerland/lat 47.5 {degree}N/long 8.4 {degree}E/410 m above sea level) with three installations of 4.4, 3.8 and 3.4 kW S.T.C. for an inverter of nominal 3.3 kW a.c.; and Lausanne (Switzerland/lat 46.6 {degree}N/long 6.6 {degree}E/410 m above sea level) with three installations of 5.6, 4.0 and 2.4 kW S.T.C. for a static inverter of nominal 3.4 kW a.c. Detailed results are available for tests performed on both installations. The results clearly demonstrate the difference between optimal energy production and optimal energy cost. Finally, recommendations are given for optimization calculations of the photovoltaic module area and new construction directives for static inverters with a view to oversizing are issued. 5 refs., 6 figs., 8 tabs.

Keller, L. [Bureau d`Etudes Keller-Burnier, Lavigny (Switzerland); Affolter, P. [Ecole Polytechnique Federale, Lausanne (Switzerland)

1995-07-01T23:59:59.000Z

462

Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control  

SciTech Connect

The trapezoidal back electromotive force (emf) brushless direct current (dc) motor (BDCM) with surface-mounted magnets has high-power density and efficiency especially when rare-earth magnet materials are used. Traction applications, such as electric vehicles, could benefit significantly from the use of such motors. Unfortunately, a practical means for driving the motor over a constant power speed ratio (CPSR) of 5:1 or more has not yet been developed. A key feature of these motors is that they have low internal inductance. The phase advance method is effective in controlling the motor power over such a speed range, but the current at high speed may be several times greater than that required at the base speed. The increase in current during high-speed operation is due to the low motor inductance and the action of the bypass diodes of the inverter. The use of such a control would require increased current rating of the inverter semiconductors and additional cooling for the inverter, where the conduction losses increase proportionally with current, and especially for the motor, where the losses increase with the square of the current. The high current problems of phase advance can be mitigated by adding series inductance; however, this reduces power density, requires significant increase in supply voltage, and leaves the CPSR performance of the system highly sensitive to variations in the available voltage. A new inverter topology and control scheme has been developed that can drive low-inductance BDCMs over the CPSR that would be required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC). It is shown that the BDCM has an infinite CPSR when it is driven by the DMIC.

Lawler, J.S.

2000-06-23T23:59:59.000Z

463

EAC Recommendations for DOE Action Regarding Non-Wires Solutions - October 17, 2012  

Energy.gov (U.S. Department of Energy (DOE))

EAC Recommendations for DOE Action Regarding Non-Wires Solutions, approved at the October 15-16, 2012 EAC Meeting.

464

Beam profile measurement with flying wires at the Fermilab Recycler Ring  

Science Conference Proceedings (OSTI)

Flying wires were installed at the Fermilab Recycler Ring for transverse beam profile measurement for both proton and antiproton beams. The following note describes the system configuration, calibration and resolution of the flying wire system, interactions between the wires and the beam, as well as analysis of the transverse beam profile in the presence of a stochastic cooling system.

Carcagno, R.; Pishchalnikov, Yu.; Krider, J.; Hu, M.; Lorman, E.; Marchionni, A.; Pordes, S.; Wilson, P.; Zagel, J.; /Fermilab

2005-05-01T23:59:59.000Z

465

Evaluation of the Effect of LOCA Testing on Polyimide Insulated Wire Subjected to Bending: Volume 2  

Science Conference Proceedings (OSTI)

Due in part to mishandling and improper installation, polyimide insulated wire has exhibited degradation in some military aircraft and power plant applications. This report presents the results of a Rochester Gas & Electric (RG&E) test program to determine the effects of bending on aged polyimide lead wire and subsequent performance of this wire during a nuclear plant design basis accident.

1998-05-19T23:59:59.000Z

466

Study of operation of a current-controlled power inverter with hysteretic current controllers under various control options  

SciTech Connect

Inverters with hysteretic current controllers have constituted one of the most common types of CD/AC power converters. They are used in high-performance AC drive systems and as a source of reactive power of power-conditioning systems. Their main feature consists in the presence of a current feedback which allows the avoidance sophisticated open-loop control strategies. Existing current-controlled inverters with hysteretic current controllers (CCI-HCC) result in the dependence of the inverter on its load characteristics, poor inverter utilization due to too much or too little supply voltage, and the current error in the tolerance band which causes deterioration of operation of the supplied motor. In this work, techniques and results of modeling the operation of a current-controlled three-phase power inverter with hysteretic current controllers are presented. Four symmetrical control options are considered: the so called independent type, semi-dependent type (a), semi-dependent type (b), and dependent type, each using three current controllers. Performance indices of an exemplary inverter-induction motor set and a RL-loaded inverter with two different mechanical loads and time constants, otherwise difficult to compute, were determined.

Rashidi, N.H.

1988-01-01T23:59:59.000Z

467

Hardware Development of a Laboratory-Scale Microgrid Phase 1--Single Inverter in Island Mode Operation: Base Year Report, December 2000 -- November 2001  

SciTech Connect

This report summarizes the activities of the first year of a three-year project to develop control software for micro-source distributed generation systems. The focus of this phase was on internal energy storage requirements, the modification of an off-the-shelf motor drive system inverter to supply utility-grade ac power, and a single inverter system operating in island mode. The report provides a methodology for determining battery energy storage requirements, a method for converting a motor drive inverter into a utility-grade inverter, and typical characteristics and test results of using such an inverter in a complex load environment.

Venkataramanan, G.; Illindala, M. S.; Houle, C.; Lasseter, R. H.

2002-11-01T23:59:59.000Z

468

A Five-Level Three-Phase Cascade Multilevel Inverter Using a Single DC Source for a PM Synchronous Motor Drive  

SciTech Connect

The interest here is in using a single DC power source to construct a 3-phase 5-level cascade multilevel inverter to be used as a drive for a PM traction motor. The 5-level inverter consists of a standard 3-leg inverter (one leg for each phase) and an H-bridge in series with each inverter leg, which use a capacitor as a DC source. It is shown that one can simultaneously maintain the regulation of the capacitor voltage while achieving an output voltage waveform which is 25% higher than that obtained using a standard 3-leg inverter by itself.

Ozpineci, Burak [ORNL; Chiasson, John N [ORNL; Tolbert, Leon M [ORNL

2007-01-01T23:59:59.000Z

469

A Five-Level Cascade Multilevel Inverter Three-Phase Motor Drive Using a Single DC Source  

SciTech Connect

A method is presented showing that a 5-level cascade multilevel inverter for a three-phase permanent magnet sychronous motor drive can be implemented using only a single DC link to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. It is shown that the capacitor voltages can be regulated while achieving an output voltage waveform that is 20% greater than that obained using the standard 3-leg inverter alone. Finally conditions are given in terms of the power factor and modulation index that determine when the capacitor voltage can regulated.

Chiasson, J. N. [University of Tennessee, Knoxville (UTK)

2006-10-01T23:59:59.000Z

470

Analysis, design and optimization of the LCC resonant inverter as a high-intensity discharge lamp ballast  

SciTech Connect

A complete study of the clamped-mode (CM) series-parallel (LCC) resonant inverter together with some of the control-to-output characteristics are presented in this paper. Also, a new control method for the CM LCC resonant inverter is introduced. With this method, the inverter is forced to operate with optimum commutations and without handling reactive energy, thus minimizing both switching and conduction losses. The corresponding design procedure is illustrated with a design example. Finally, some experimental results obtained from a prototype at the laboratory are also shown to validate the analysis and evaluate the proposed control method.

Alonso, J.M.; Blanco, C.; Lopez, E.; Calleja, A.J.; Rico, M. [Univ. de Oviedo, Gijon (Spain). Dept. de Ingenieria Electrica y Electronica

1998-05-01T23:59:59.000Z

471

Program on Technology Innovation: Five-Wire Feasibility on Con Edison's Distribution Systems  

Science Conference Proceedings (OSTI)

The feasibility of a five-wire distribution system has gained interest in recent years. The five-wire distribution system features an isolated neutral that carries unbalanced load current. The main advantages of the five-wire distribution system include lower stray voltage and magnetic fields and easier detection of high-impedance faults. Under normal conditions, the five-wire design operates very similar to the four-wire design with one major exception all the return current is confined to the neutral t...

2006-09-05T23:59:59.000Z

472

Plastic Limit Analysis of Offshore Foundation and Anchor  

E-Print Network (OSTI)

This study presents the applications of plastic limit analysis to offshore foundations and anchors, including the drag embedment anchors (DEAs) for mobile offshore drilling units (MODU’s) and spudcan foundations for jack-up platforms. In deep waters, drag embedment anchors are an attractive option for mooring of semisubmersible platforms due to low installation cost and high holding capacity; on the other hand, jack-up platforms are more stable than semisubmersible platforms but only can be placed in shallow waters. The analyses of anchor capacities are developed for an idealized anchor comprising a rectangular fluke, a cylindrical shank, and a metal chain connected to the shank at the padeye. The anchor trajectory prediction during drag embedment is also developed by considering anchor behavior in conjunction with the mechanics of the anchor line. The results of simulations show that anchors approach at equilibrium condition rapidly during the embedment and both the normalized holding capacity and the anchor line uplift angle remain constants in this stage. Besides the geometry of the fluke, the properties of the shank and soil are also crucial factors in the anchor-soil interaction behavior. Partial failure of mooring systems for floating structures will subject drag anchors to loads having an appreciable component outside of the intended plane of loading. Partial failure of mooring systems during hurricanes in recent years have generated an interest in understanding drag anchor performance under these conditions. The analysis presents the simulations of three dimensional trajectories of an anchor system subjected to an out-of-plane load component. For the conditions simulated in the example analyses, the anchor experienced a modest amount of continued embedment following partial failure of the mooring system; however, the ultimate embedment and capacity of the anchor is much less than what would have developed if the anchor had continued in its original trajectory within the plane of intended loading. The analyses of the spudcan foundation of jack-up units include preloading, bearing capacity, and the displacement assessment. When the contribution of the soil moment resistance is considered, a three-stage assessment procedure is recommended: superposing environmental forces on the plot of yield surface, determining the value of yield function corresponding to the external forces, and computing the factor of safety of the spudcan. The results of the assessment may be ambiguous while the different yield functions are employed to analyze the spudcan in soft clay.

Chi, Chao-Ming

2010-08-01T23:59:59.000Z

473

Environmental Science and Research Foundation, Inc. annual technical report: Calendar year 1997  

Science Conference Proceedings (OSTI)

This Annual Technical Report describes work conducted for the Department of Energy, Idaho Operations Office (DOE-ID), by the Environmental Science and Research Foundation (Foundation). The Foundation`s mission to DOE-ID provides support in several key areas. The Foundation conducts an environmental monitoring and surveillance program over an area covering much of the upper Snake River Plain, and provides environmental education and support services related to Idaho National Engineering and Environmental Laboratory (INEEL) natural resource issues. Also, the Foundation, with its University Affiliates, conducts ecological and radioecological research on the Idaho National Environmental Research Park. This research benefits major DOE-ID programs including Waste Management, Environmental Restoration, Spent Nuclear Fuels, and Land Management Issues. Summaries are included of the individual research projects.

Reynolds, R.D.; Warren, R.W. [eds.

1998-05-01T23:59:59.000Z

474

Environmental Science and Research Foundation annual technical report: Calendar year 1996  

SciTech Connect

This Annual Technical Report describes work conducted for the Department of Energy, Idaho Operations Office (DOE-ID), by the Environmental Science and Research Foundation (Foundation). The Foundation`s mission to DOE-ID provides support in several key areas. The authors conduct an environmental monitoring and surveillance program over an area covering much of the upper Snake River Plain, and provide environmental education and support services related to Idaho National Engineering and Environmental Laboratory (INEEL) natural resource issues. Also, the Foundation, with its University Affiliates, conducts ecological and radioecological research in the Idaho National Environmental Research Park. This research benefits major DOE-ID programs including Waste Management, Environmental Restoration, Spent Nuclear Fuels, and Land Management Issues. The major accomplishments of the Foundation and its University Affiliates during the calendar year 1996 are discussed.

Morris, R.C.; Blew, R.D. [eds.

1997-07-01T23:59:59.000Z

475

Dynamic Model Validation of PV Inverters Under Short-Circuit Conditions: Preprint  

SciTech Connect

Photovoltaic (PV) modules have dramatically decreased in price in the past few years, spurring the expansion of photovoltaic deployment. Residential and commercial rooftop installations are connected to the distribution network; large-scale installation PV power plants (PVPs) have benefited from tax incentives and the low cost of PV modules. As the level penetration of PV generation increases, the impact on power system reliability will also be greater. Utility power system planners must consider the role of PV generation in power systems more realistically by representing PV generation in dynamic stability analyses. Dynamic models of PV inverters have been developed in the positive sequence representation. NREL has developed a PV inverter dynamic model in PSCAD/EMTDC. This paper validates the dynamic model with an actual hardware bench test conducted by Southern California Edison's Distributed Energy Resources laboratory. All the fault combinations -- symmetrical and unsymmetrical -- were performed in the laboratory. We compare the simulation results with the bench test results.

Muljadi, E.; Singh, M.; Bravo, R.; Gevorgian, V.

2013-03-01T23:59:59.000Z

476

An Inverter Packaging Scheme for an Integrated Segmented Traction Drive System  

Science Conference Proceedings (OSTI)

The standard voltage source inverter (VSI), widely used in electric vehicle/hybrid electric vehicle (EV/HEV) traction drives, requires a bulky dc bus capacitor to absorb the large switching ripple currents and prevent them from shortening the battery s life. The dc bus capacitor presents a significant barrier to meeting inverter cost, volume, and weight requirements for mass production of affordable EVs/HEVs. The large ripple currents become even more problematic for the film capacitors (the capacitor technology of choice for EVs/HEVs) in high temperature environments as their ripple current handling capability decreases rapidly with rising temperatures. It is shown in previous work that segmenting the VSI based traction drive system can significantly decrease the ripple currents and thus the size of the dc bus capacitor. This paper presents an integrated packaging scheme to reduce the system cost of a segmented traction drive.

Su, Gui-Jia [ORNL; Tang, Lixin [ORNL; Ayers, Curtis William [ORNL; Wiles, Randy H [ORNL

2013-01-01T23:59:59.000Z

477

Fabrication and Evaluation of a High Performance SiC Inverter for Wireless Power Transfer Applications  

SciTech Connect

In this study, a high power density SiC high efficiency wireless power transfer converter system via inductive coupling has been designed and developed. The detailed power module design, cooling system design and power stage development are presented. The successful operation of rated power converter system demonstrates the feasible wireless charging plan. One of the most important part of this study is the wind bandgap devices packaged at the Oak Ridge National Laboratory (ORNL) using the in-house packaging technologies by employing the bare SiC dies acquired from CREE, which are rated at 50 A / 1200 V each. These packaged devices are also inhouse tested and characterized using ORNL s Device Characterization Facility. The successful operation of the proposed inverter is experimentally verified and the efficiency and operational characteristics of the inverter are also revealed.

Onar, Omer C [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Ning, Puqi [ORNL] [ORNL; Miller, John M [ORNL] [ORNL; Liang, Zhenxian [ORNL] [ORNL

2013-01-01T23:59:59.000Z

478

Hydrodynamics of adiabatic inverted annular flow: an experimental study. [PWR; BWR  

SciTech Connect

For low-quality film boiling in tubes or rod bundles, the flow pattern may consist of a liquid jet-like core surrounded by a vapor annulus, i.e., inverted annular flow. The stability, shape, and break-up mechanisms of this liquid core must be understood in order to model correctly this regime and to develop appropriate interfacial transfer correlations. This paper reports on a study in which inverted annular flow was simulated in an adiabatic system. Turbulent water jets, issuing downward from long-aspect nozzles were enclosed within cocurrent gas annuli. Jet-core diameter and velocity, and gas-annulus diameter, velocity, and species were varied, yielding liquid Reynolds numbers up to 33,000, void fractions from 0.29 to 0.95, and relative velocities from near zero to over 80 m/s. Jet-core break-up lengths and secondarily, core break-up mechanisms, were observed visually, using strobe lighting.

De Jarlais, G.; Ishii, M.

1983-01-01T23:59:59.000Z

479

Dynamic Model Validation of PV Inverters Under Short-Circuit Conditions: Preprint  

SciTech Connect

Photovoltaic (PV) modules have dramatically decreased in price in the past few years, spurring the expansion of photovoltaic deployment. Residential and commercial rooftop installations are connected to the distribution network; large-scale installation PV power plants (PVPs) have benefited from tax incentives and the low cost of PV modules. As the level penetration of PV generation increases, the impact on power system reliability will also be greater. Utility power system planners must consider the role of PV generation in power systems more realistically by representing PV generation in dynamic stability analyses. Dynamic models of PV inverters have been developed in the positive sequence representation. NREL has developed a PV inverter dynamic model in PSCAD/EMTDC. This paper validates the dynamic model with an actual hardware bench test conducted by Southern California Edison's Distributed Energy Resources laboratory. All the fault combinations -- symmetrical and unsymmetrical -- were performed in the laboratory. We compare the simulation results with the bench test results.

Muljadi, E.; Singh, M.; Bravo, R.; Gevorgian, V.

2013-03-01T23:59:59.000Z

480

Shootthrough fault protection system for bipolar transistors in a voltage source transistor inverter  

SciTech Connect

Faulted bipolar transistors in a voltage source transistor inverter are protected against shootthrough fault current, from the filter capacitor of the d-c voltage source which drives the inverter over the d-c bus, by interposing a small choke in series with the filter capacitor to limit the rate of rise of that fault current while at the same time causing the d-c bus voltage to instantly drop to essentially zero volts at the beginning of a shootthrough fault. In this way, the load lines of the faulted transistors are effectively shaped so that they do not enter the second breakdown area, thereby preventing second breakdown destruction of the transistors.

Wirth, W.F.

1982-01-12T23:59:59.000Z

Note: This page contains sample records for the topic "inverter wiring foundation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Theoretical analysis and experimental validation of a novel multilevel inverter topology for renewable energy interfacing applications  

Science Conference Proceedings (OSTI)

This paper presents a new topological structure for symmetrical cascaded multilevel inverters. The proposed circuit consists of cross-connected separate symmetrical DC sources which can generate number of levels equal to that of a cascaded H-bridge topology with reduced number of power switches. It is especially suitable for utility interfacing of renewable energy sources. It also offers the possibility of a transformer less and filter less operation. The working principle of the proposed topology is explained with the help of a single-phase five level inverter. Simulation results are obtained in matlab/simulink environment and are verified experimentally on a laboratory prototype. An exhaustive comparison of the proposed topology is made with the classical cascaded H-bridge topology

Krishna Kumar Gupta

2012-01-01T23:59:59.000Z

482

Wire Making Techniques - HTS Coated Conductors - Fact Sheet  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Rolling Assisted Biaxially Textured Substrates (RABiTS Rolling Assisted Biaxially Textured Substrates (RABiTS TM ) coated conductors, characterized by their low cost and simple architecture, promise to meet industry price and performance targets. Introduction Since the discovery of high-temperature superconductors (HTS), notably YBa 2 Cu 3 O 7 (YBCO), researchers at the U.S. Department of Energy's (DOE) national laboratories have searched for ways to manufacture affordable flexible wires with high current density. One of the chief obstacles to the manufacture of commercial lengths of YBCO wire has been the phenomenon of weak links, which exist where current crosses a non-superconducting region such as a grain boundary. By aligning grains carefully, low angle boundaries between superconducting grains are assured, which

483

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

484

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

485

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

486

Wire Scanner Beam Profile Measurements: LANSCE Facility Beam Development  

SciTech Connect

The Los Alamos Neutron Science Center (LANSCE) is replacing Wire Scanner (WS) beam profile measurement systems. Three beam development tests have taken place to test the new wire scanners under beam conditions. These beam development tests have integrated the WS actuator, cable plant, electronics processors and associated software and have used H{sup -} beams of different beam energy and current conditions. In addition, the WS measurement-system beam tests verified actuator control systems for minimum profile bin repeatability and speed, checked for actuator backlash and positional stability, tested the replacement of simple broadband potentiometers with narrow band resolvers, and tested resolver use with National Instruments Compact Reconfigurable Input and Output (cRIO) Virtual Instrumentation. These beam tests also have verified how trans-impedance amplifiers react with various types of beam line background noise and how noise currents were not generated. This paper will describe these beam development tests and show some resulting data.

Gilpatrick, John D. [Los Alamos National Laboratory; Batygin, Yuri K. [Los Alamos National Laboratory; Gonzales, Fermin [Los Alamos National Laboratory; Gruchalla, Michael E. [Los Alamos National Laboratory; Kutac, Vincent G. [Los Alamos National Laboratory; Martinez, Derwin [Los Alamos National Laboratory; Sedillo, James Daniel [Los Alamos National Laboratory; Pillai, Chandra [Los Alamos National Laboratory; Rodriguez Esparza, Sergio [Los Alamos National Laboratory; Smith, Brian G. [Los Alamos National Laboratory

2012-05-15T23:59:59.000Z

487

PARALLEL ION BEAM PROFILE SCAN USING LASER WIRE  

Science Conference Proceedings (OSTI)

We report on the world s first experiment of a parallel profile scan of the hydrogen ion (H-) beam using a laser wire system. The system was developed at the superconducting linac of the Spallation Neutron Source (SNS) accelerator complex. The laser wire profile scanner is based on a photo-detachment process and therefore can be conducted on an operational H- beam in a nonintrusive manner. The parallel profile scanning system makes it possible to simultaneously measure profiles of the 1-MW neutron production H- beam at 9 different locations of the linac by using a single light source. This paper describes the design, optical system and software platform development, and measurement results of the parallel profile scanning system.

Liu, Yun [ORNL; Aleksandrov, Alexander V [ORNL; Huang, Chunning [ORNL; Long, Cary D [ORNL; Dickson, Richard W [ORNL

2013-01-01T23:59:59.000Z

488

Dissipation in a Quantum Wire: Fact and Fantasy  

Science Conference Proceedings (OSTI)

Where, and how, does energy dissipation of electrical energy take place in a ballistic wire? Fully two decades after the advent of the transmissive phenomenology of electrical conductance, this deceptively simple query remains unanswered. We revisit the quantum kinetic basis of dissipation and show its power to give a definitive answer to our query. Dissipation leaves a clear, quantitative trace in the non-equilibrium current noise of a quantum point contact; this signature has already been observed in the laboratory. We then highlight the current state of accepted understandings in the light of well-known yet seemingly contradictory measurements. The physics of mesoscopic transport rests not in coherent carrier transmission through a perfect and dissipationless metallic channel, but explicitly in their dissipative inelastic scattering at the wire's interfaces and adjacent macroscopic leads.

Das, Mukunda P. [Department of Theoretical Physics, IAS, Australian National University, Canberra, ACT 0200 (Australia); Green, Frederick [School of Physics, University of New South Wales, Sydney, NSW 2052 (Australia)

2008-10-23T23:59:59.000Z

489

Wrapping process for fabrication of A-15 superconducting composite wires  

DOE Patents (OSTI)

A method for fabricating superconducting wires wherein a billet of copper containing filaments of niobium or vanadium is rolled to form a strip which is wrapped about a tin-alloy core to form a composite. The alloy is a tin-copper alloy for niobium filaments and a gallium-copper alloy for vanadium filaments. The composite is then drawn down to a desired wire size and heat treated. During the heat treatment process, the tin in the bronze reacts with the niobium to form the superconductor niobium tin. In the case where vanadium is used, the gallium in the gallium bronze reacts with the vanadium to form the superconductor vanadium gallium. This new process eliminates the costly annealing steps, external tin plating and drilling of bronze ingots required in a number of prior art processes.

Suenaga, M.; Klamut, C.J.; Luhman, T.S.

1980-08-15T23:59:59.000Z

490

The Efficacy of Foundations & Frameworks on Elementary Students' Reading Achievement in Urban Christian Schools.  

E-Print Network (OSTI)

??This study was designed to assess the efficacy of Foundations & Frameworks (F&F), an instructional program emphasizing reading comprehension, on fourth and fifth grade students'… (more)

Blackmon, Cheryl McClure

2008-01-01T23:59:59.000Z

491

A unified foundational ontology and some applications of it in business modeling  

E-Print Network (OSTI)

Abstract: Foundational ontologies provide the basic concepts upon which any domain-specific ontology is built. This paper presents a new foundational ontology, UFO, and shows how it can be used as a guideline in business modeling and for evaluating business modeling methods. UFO is derived from a synthesis of two other foundational ontologies, GFO/GOL and OntoClean/DOLCE. While their main areas of application are natural sciences and linguistics/cognitive engineering, respectively, the main purpose of UFO is to provide a foundation for conceptual modeling, including business modeling. 1

Giancarlo Guizzardi; Gerd Wagner

2004-01-01T23:59:59.000Z

492

Exterior Rigid Foam Insulation at the Edge of a Slab Foundation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exterior Rigid Foam Insulation at the Edge of a Slab Foundation, Fresno, California (Fact Sheet), Building America Case Study: Efficient Solutions for New and Existing Homes,...

493

Specification for Smart Inverter Interactions with the Electric Grid Using International Electrotechnical Commission 61850  

Science Conference Proceedings (OSTI)

This document contains a specification for communication with smart inverters. The communications enable a range of common functions for photovoltaic and storage systems. This specification is the work product of an industry collaborative activity that was managed by the Electric Power Research Institute (EPRI) in coordination with the Department of Energy, Sandia National Laboratories, and the Solar Electric Power Association. The activity was managed as an open process, ultimately engaging more than 35...

2010-10-13T23:59:59.000Z

494

Plant Support Engineering: Guidance for Replacing Inverters and Battery Chargers at Nuclear Power Plants  

Science Conference Proceedings (OSTI)

Utilities are continuing to pursue license renewal applications and power uprates, and these initiatives are being undertaken on an aging fleet of nuclear plants. Many plants must replace inverters and battery chargers to support these initiatives. However, industry expertise to support such activities has diminished since the days of plant constructionthere are fewer qualified vendors and equipment manufacturers, materials have changed in many cases, and licensees are typically not currently staffed for...