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Note: This page contains sample records for the topic "turning converter-see inverter" 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.


1

Epi-Fluorescence Inverted Microscope (Zeiss,  

E-Print Network [OSTI]

Epi-Fluorescence Inverted Microscope (Zeiss, Observer Z1) April 2013 #12;Start Up cont. · Turn) #12;Using the Microscope cont. · On an inverted microscope samples on a glass slide are usually viewed

Subramanian, Venkat

2

Invert Recommendations The Invert project  

E-Print Network [OSTI]

­ Polish Foundation for Energy Efficiency, Poland - FhG-ISI ­ Fraunhofer Institute for Systems and Innovation Research, Germany Contact/Information: Lukas.Kranzl@tuwien.ac.at www.invert.at Imprint: Energy

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

boolean queries Inverted index  

E-Print Network [OSTI]

boolean queries Inverted index query processing Query optimization boolean model September 9, 2014 1 / 39 #12;boolean queries Inverted index query processing Query optimization Outline 1 boolean queries 2 Inverted index 3 query processing 4 Query optimization 2 / 39 #12;boolean queries Inverted index

Lu, Jianguo

5

Green Power Inverter Prvningsrapport  

E-Print Network [OSTI]

Green Power Inverter Prøvningsrapport SolenergiCentret Søren Poulsen Ivan Katic Oktober 2004 #12;Green Power Inverter målerapport.doc SolenergiCentret - 04-03-2005 2 Forord Nærværende rapport indeholder Teknologisk Instituts bidrag til målinger i forbindelse med PSO projektet "Green Power Inverter

6

Invertible Darboux Transformations  

E-Print Network [OSTI]

For operators of many different kinds it has been proved that (generalized) Darboux transformations can be built using so called Wronskian formulae. Such Darboux transformations are not invertible in the sense that the corresponding mappings of the operator kernels are not invertible. The only known invertible ones were Laplace transformations (and their compositions), which are special cases of Darboux transformations for hyperbolic bivariate operators of order 2. In the present paper we find a criteria for a bivariate linear partial differential operator of an arbitrary order d to have an invertible Darboux transformation. We show that Wronkian formulae may fail in some cases, and find sufficient conditions for such formulae to work.

Ekaterina Shemyakova

2013-01-04T23:59:59.000Z

7

Outline Inverted File Building Compression for Inverted Files Building and Compression Techniques for Inverted  

E-Print Network [OSTI]

Outline Inverted File Building Compression for Inverted Files Building and Compression Techniques for Inverted Files Roi Blanco Dpt. Computing Science, University of A Coruna December 13, 2005 Roi Blanco Building and Compression Techniques for Inverted Files #12;Outline Inverted File Building Compression

Barreiro, Alvaro

8

Inverted gravity, not inverted shape impairs biological motion perception  

E-Print Network [OSTI]

Inverted gravity, not inverted shape impairs biological motion perception Nikolaus Trojetroje. Scrambling should therefore impair perception even more than inversion. Upright and inverted scrambled motion). Is the cause of the inversion effect inverted gravity? If this is the case upright scrambled motion should

Troje, Nikolaus

9

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

10

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

11

biosemiotics turning wild  

E-Print Network [OSTI]

biosemiotics turning wild essays in honour of kalevi kull on the occasion of his 60th birthday #12;Biosemiotics Turning Wild. Essays in Honour of Kalevi Kull on the Occasion of His 60th Birthday. Edited by Timo

Markos, Anton

12

Gas cooled traction drive inverter  

SciTech Connect (OSTI)

The present invention provides a modular circuit card configuration for distributing heat among a plurality of circuit cards. Each circuit card includes a housing adapted to dissipate heat in response to gas flow over the housing. In one aspect, a gas-cooled inverter includes a plurality of inverter circuit cards, and a plurality of circuit card housings, each of which encloses one of the plurality of inverter cards.

Chinthavali, Madhu Sudhan

2013-10-08T23:59:59.000Z

13

2.3 Characterizations of Invertible Matrices Theorem 8 (The Invertible Matrix Theorem)  

E-Print Network [OSTI]

2.3 Characterizations of Invertible Matrices Theorem 8 (The Invertible Matrix Theorem) Let true or all false). a. A is an invertible matrix. b. A is row equivalent to In. c. A has n pivot. AT is an invertible matrix. EXAMPLE: Use the Invertible Matrix Theorem to determine if A is invertible, where A 1 3 0

Belykh, Igor

14

Invertible Program Restructurings for Continuing Modular Maintenance  

E-Print Network [OSTI]

Invertible Program Restructurings for Continuing Modular Maintenance Julien Cohen ASCOLA team (EMN in main- tenance with invertible program transformations. We illustrate this on the typical Expression problems with our approach. Keywords-modular maintenance; restructuring; invertible pro- gram

Paris-Sud XI, Université de

15

Current Source Inverters for HEVs and FCVs  

Broader source: Energy.gov (indexed) [DOE]

weight for inverters. Currently, it contributes - Cost and weight, up to 23% of an inverter - Volume, up to 30% of an inverter * Ability of film capacitors to operate at higher...

16

Turning fungus into fuel  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatusButlerTransportation6/14/11 Page 1 of 17TurbinesTurningTurning

17

Diamond turning of glass  

SciTech Connect (OSTI)

A new research initiative will be undertaken to investigate the critical cutting depth concepts for single point diamond turning of brittle, amorphous materials. Inorganic glasses and a brittle, thermoset polymer (organic glass) are the principal candidate materials. Interrupted cutting tests similar to those done in earlier research are Ge and Si crystals will be made to obtain critical depth values as a function of machining parameters. The results will provide systematic data with which to assess machining performance on glasses and amorphous materials

Blackley, W.S.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

18

Inverted Metamorphic Multijunction (IMM) Cell Processing Instructions  

SciTech Connect (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

19

Advanced Modular Inverter Technology Development  

SciTech Connect (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

20

Real-Time Optimization of Dead Time for Motor Control Inverters 0-7803-3840-5/97/$10.000 1997 IEEE 597  

E-Print Network [OSTI]

597 JonathanKimball Motorola, Inc. Semiconductor Products Sector Phoenix. Arizona Abstract current either to each leg or to the inverter bridge as a whole. This in turn minimizes switching loss power semiconductor device in an inverter or synchronous rectifier application, the objective of dead

Kimball, Jonathan W.

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Leica-Inverted-2 -1-Short instructions Short instructions for the Leica-Inverted-2  

E-Print Network [OSTI]

Leica-Inverted-2 -1- Short instructions Short instructions for the Leica-Inverted-2 Version 230307 off the system Page 8 8. Trouble shooting Page 10 #12;Leica-Inverted-2 -2- Short instructions 1. Laser;Leica-Inverted-2 -3- Short instructions 2. General guidelines 1. Lab rules: This room is a S2 laboratory

Manstein, Dietmar J.

22

David J. Hathaway, IBM EDAInverter Minimization 1 Inverter Minimization -OverviewInverter Minimization -Overview  

E-Print Network [OSTI]

David J. Hathaway, IBM EDAInverter Minimization 1 Inverter Minimization - OverviewInverter network a polarity graph 9 Initially consider only equal cost AND, NAND, OR, and NOR gates 9 Inverters for covering fundamental cycles 9 Considering electrically useful inverters #12;David J. Hathaway, IBM

Ellis-Monaghan, Joanna

23

On Optimal Inverters Department of Computer Science  

E-Print Network [OSTI]

On Optimal Inverters Yijia Chen Department of Computer Science Shanghai Jiaotong University yijia.flum@math.uni­freiburg.de Abstract Leonid Levin showed that every algorithm computing a function has an optimal inverter. Recently. An inverter I of F is an algorithm that for all y in the range of F computes a preimage I(y) of y, i.e., F

Chen, Yijia

24

AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER  

E-Print Network [OSTI]

AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high sourcing inverters where the small disturbance at the line voltage may lead to current run away

25

Invertibility of random matrices M. Rudelson  

E-Print Network [OSTI]

Invertibility of random matrices M. Rudelson We will discuss several recent developments related to invertibility and spectral properties of large random matrices. Consider an n ? n matrix, whose values are independent identically distributed random variables. The invertibility questions can be roughly divided

Weinberger, Hans

26

On Optimal Inverters Department of Computer Science  

E-Print Network [OSTI]

On Optimal Inverters Yijia Chen Department of Computer Science Shanghai Jiaotong University yijia.flum@math.uni-freiburg.de Abstract Leonid Levin showed that every algorithm computing a function has an optimal inverter. Recently. An inverter I of F is an algorithm that for all y in the range of F computes a preimage I(y) of y, i.e., F

Chen, Yijia

27

Joint Inverted Indexing Kaiming He2  

E-Print Network [OSTI]

Joint Inverted Indexing Yan Xia1 Kaiming He2 Fang Wen2 Jian Sun2 1 University of Science and Technology of China 2 Microsoft Research Asia Abstract Inverted indexing is a popular non-exhaustive solution to large scale search. An inverted file is built by a quantizer such as k-means or a tree structure. It has

Bernstein, Phil

28

Thermal Study of Inverter Components: Preprint  

SciTech Connect (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

29

Effective switching frequency multiplier inverter  

DOE Patents [OSTI]

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

30

Group Response System Turning Point  

E-Print Network [OSTI]

. · But more often I do use it within a slide show. Somewhat more difficult to manage. But some great uses-Add-in for Power Point. · Some "Clicking" practice. #12;Make A Slide-Add to this file. · Esc, click on TurningPoint add-in · Pick Insert Slide in Turning Point bar and insert a Turning Point slide after this slide

31

Multilevel Inverters for Electric Vehicle Applications  

SciTech Connect (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

32

System and method for regulating resonant inverters  

DOE Patents [OSTI]

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

33

Tune Evaluation From Phased BPM Turn-By-Turn Data  

E-Print Network [OSTI]

In fast ramping synchrotrons like the Fermilab Booster the conventional methods of betatron tune evaluation from the turn-by-turn data may not work due to rapid changes of the tunes (sometimes in a course of a few dozens of turns) and a high level of noise. We propose a technique based on phasing of signals from a large number of BPMs which significantly increases the signal to noise ratio. Implementation of the method in the Fermilab Booster control system is described and some measurement results are presented.

Alexahin, Y; Marsh, W

2012-01-01T23:59:59.000Z

34

Droop-Controlled Inverters are Kuramoto Oscillators  

E-Print Network [OSTI]

Droop-Controlled Inverters are Kuramoto Oscillators John W. Simpson-Porco Florian D¨orfler Barbara, Santa Barbara, CA 93106, USA, (e-mail: {johnwsimpsonporco,dorfler

Bullo, Francesco

35

Inverter Using Current Source Topology  

Broader source: Energy.gov (indexed) [DOE]

of the new current-fed Trans-ZSI with wider motoring operation range V in 100 V, transformer turns ratio2 * Comparison of voltage boost ratio vs. duty ratio D A New...

36

Hybrid Multilevel Inverter with Single DC Haiwen Liu1  

E-Print Network [OSTI]

Hybrid Multilevel Inverter with Single DC Source Haiwen Liu1 , Leon M. Tolbert1, 2 , Burak Ozpineci Knoxville, TN 37932 3. Parker-Hannifin Corp. Olive Branch, MI 38654 Abstract- A hybrid multilevel inverter inverter (one leg for each phase) and H-bridge in series with each inverter leg. The inverter can be used

Tolbert, Leon M.

37

The inverter in a hybrid or fully  

E-Print Network [OSTI]

The inverter in a hybrid or fully electric vehicle, such as the Toyota Prius, supplies power from the batteries to the motor. Inverters used in this application are currently limited by their power new material devices under real operating conditions. A project with TRW and others is investigating

Davies, Christopher

38

Inverted faces are (eventually) processed holistically Jennifer J. Richler  

E-Print Network [OSTI]

Inverted faces are (eventually) processed holistically Jennifer J. Richler , Michael L. Mack whether processing differences between upright and inverted faces are qualitative or quantitative. We present two experiments comparing holistic processing of upright and inverted faces within the composite

Palmeri, Thomas

39

Invertible extensions of continuous maps Real symmetric functions  

E-Print Network [OSTI]

Invertible extensions of continuous maps Real symmetric functions Covering dimension Bass and topological stable rank Real symmetric extensions of invertible tuples of multivariable continuous functions;Invertible extensions of continuous maps Real symmetric functions Covering dimension Bass and topological

Mortini, Raymond

40

Integration of Novel Flux Coupling Motor and Current Source Inverter...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Current Source Inverters for HEVs and FCVs Vehicle Technologies Office Merit Review 2014: Wireless Charging Integration of Novel Flux Coupling Motor and Current Source Inverter...

Note: This page contains sample records for the topic "turning converter-see inverter" 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

High-Temperature, Air-Cooled Traction Drive Inverter Packaging...  

Broader source: Energy.gov (indexed) [DOE]

High-Temperature, Air-Cooled Traction Drive Inverter Packaging High-Temperature, Air-Cooled Traction Drive Inverter Packaging 2010 DOE Vehicle Technologies and Hydrogen Programs...

42

Optically Isolated HVIGBT Based MW Cascade Inverter Building...  

Broader source: Energy.gov (indexed) [DOE]

Capacity Power ConverterInverter Competitive Advantages Only One Other >100 KW Heat Pipe Inverter - GE Innovation Series Converter - Non-Optical, Lower Power Capacity...

43

Integration of Novel Flux Coupling Motor and Current Source Inverter  

Broader source: Energy.gov (indexed) [DOE]

To integrate a non permanent magnet (PM) electric machine and a current source inverter (CSI) * minimizing capacitors in inverters * eliminating rare earth materials used in...

44

Advanced Soft Switching Inverter for Reducing Switching and Power...  

Broader source: Energy.gov (indexed) [DOE]

lai.pdf More Documents & Publications Advanced Soft Switching Inverter for Reducing Switching and Power Losses Advanced Soft Switching Inverter for Reducing Switching and Power...

45

Magnet Coil Shorted Turn Detector  

SciTech Connect (OSTI)

The Magnet Coil Shorted Turn Detector has been developed to facilitate the location of shorted turns in magnet coils. Finding these shorted turns is necessary to determine failure modes that are a necessary step in developing future production techniques. Up to this point, coils with shorted turns had the insulation burned off without the fault having been located. This disassembly process destroyed any chance of being able to find the fault. In order to maintain a flux balance in a coupled system such as a magnet coil, the current in a shorted turn must be opposed to the incident current. If the direction of the current in each conductor can be measured relative to the incident current, then the exact location of the short can be determined. In this device, an AC voltage is applied to the magnet under test. A small hand held B-dot pickup coil monitors the magnetic field produced by current in the individual magnet conductors. The relative phase of this pickup coil voltage is compared to a reference signal derived from the input current to detect a current reversal as the B-dot pickup coil is swept over the conductors of the coil under test. This technique however, is limited to only those conductors that are accessible to the hand held probe.

Dinkel, J.A.; Biggs, J.E.

1994-03-01T23:59:59.000Z

46

Inverted catenoids, curvature singularities and tethered membranes  

E-Print Network [OSTI]

If a catenoid is inverted in any interior point, a deflated compact geometry is obtained which touches at two points (its poles). The catenoid is a minimal surface and, as such, is an equilibrium shape of a symmetric fluid membrane. The conformal symmetry of the Hamiltonian implies that inverted minimal surfaces are also equilibrium shapes. However, they exhibit curvature singularities at their poles. These singularities are associated with external forces pulling the poles together. Unlike the catenoid which is free of stress, there will be stress within the inverted shapes. If the surface area is fixed, reducing the external force induces a transition from a discocyte to a cup-shaped stomatocyte.

Pavel Castro-Villarreal; Jemal Guven

2007-02-14T23:59:59.000Z

47

Hamilton's theory of turns revisited  

E-Print Network [OSTI]

We present a new approach to Hamilton's theory of turns for the groups SO(3) and SU(2) which renders their properties, in particular their composition law, nearly trivial and immediately evident upon inspection. We show that the entire construction can be based on binary rotations rather than mirror reflections.

N. Mukunda; S. Chaturvedi; R. Simon

2009-04-30T23:59:59.000Z

48

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

49

Hybrid Cascaded Multilevel Inverter with PWM Control Method  

E-Print Network [OSTI]

162 Hybrid Cascaded Multilevel Inverter with PWM Control Method Haiwen Liu1 , Leon M. Tolbert1, 2 inverter with PWM method is presented in this paper. It consists of a standard 3-leg inverter (one leg for each phase) and H-bridge in series with each inverter leg. It can use only a single DC power source

Tolbert, Leon M.

50

Single-electron inverter C. P. Heij,a)  

E-Print Network [OSTI]

Single-electron inverter C. P. Heij,a) P. Hadley, and J. E. Mooij Applied Physics and DIMES, Delft for publication 8 December 2000 A single-electron inverter was fabricated that switches from a high output of the inverter, the two single-electron transistors that make up the inverter must exhibit voltage gain. Voltage

51

Diamond turning machine controller implementation  

SciTech Connect (OSTI)

The standard controller for a Pnuemo ASG 2500 Diamond Turning Machine, an Allen Bradley 8200, has been replaced with a custom high-performance design. This controller consists of four major components. Axis position feedback information is provided by a Zygo Axiom 2/20 laser interferometer with 0.1 micro-inch resolution. Hardware interface logic couples the computers digital and analog I/O channels to the diamond turning machine`s analog motor controllers, the laser interferometer, and other machine status and control information. It also provides front panel switches for operator override of the computer controller and implement the emergency stop sequence. The remaining two components, the control computer hardware and software, are discussed in detail below.

Garrard, K.P.; Taylor, L.W.; Knight, B.F.; Fornaro, R.J.

1988-12-01T23:59:59.000Z

52

Diamond turning of thermoplastic polymers  

SciTech Connect (OSTI)

Single point diamond turning studies were made using a series of thermoplastic polymers with different glass transition temperatures. Variations in surface morphology and surface roughness were observed as a function of cutting speed. Lower glass transition temperatures facilitate smoother surface cuts and better surface finish. This can be attributed to the frictional heating that occurs during machining. Because of the very low glass transition temperatures in polymeric compared to inorganic glasses, the precision machining response can be very speed sensitive.

Smith, E.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

53

Part I:Part I: Degradation in 3.2 nm Gate Oxides:Degradation in 3.2 nm Gate Oxides: Effects on Inverter Performance and MOSFETEffects on Inverter Performance and MOSFET  

E-Print Network [OSTI]

on Inverter Performance and MOSFETEffects on Inverter Performance and MOSFET Characteristics.2 nm Gate Oxides: Effects on Inverter Performance and MOSFETEffects on Inverter Performance and MOSFET

Anlage, Steven

54

The Inverted Block Rate:The Inverted Block Rate: An Alternative to Flat Rate BillingAn Alternative to Flat Rate Billing  

E-Print Network [OSTI]

The Inverted Block Rate:The Inverted Block Rate: An Alternative to Flat Rate BillingAn Alternative;Inverted Block RateInverted Block Rate 22 IntroductionIntroduction ·· Modern societies rely on electrical collectionMetering and Rate Models facilitate collection #12;Inverted Block RateInverted Block Rate 33 Rate

Hughes, Larry

55

TurningPoint Evaluation Results  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf The 2012 Greenbuy3 Archive DOE-HDBK-1129-2008of EnergyTurn Your

56

Summary of Inverter Technologies Prepared for the  

E-Print Network [OSTI]

Delivery and Energy Reliability Under Cooperative Agreement No. DE-EE0003507 Hawai`i Energy Sustainability Program Subtask 3.1 Photovoltaic Systems: Report 2 Summary of Inverter Technologies Submitted by Hawai [1]. Gridconnected photovoltaic (PV) installations, one of the most common types of DER, typically

57

Pulse width modulation inverter with battery charger  

DOE Patents [OSTI]

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

58

Understanding Fault Characteristics of Inverter-Based Distributed Energy Resources  

SciTech Connect (OSTI)

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

59

Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models  

E-Print Network [OSTI]

Integrating Photovoltaic Inverter Reliability into Energy Yield Estimation with Markov Models@illinois.edu Abstract-- Markov reliability models to estimate Photovoltaic (PV) inverter reliability of the inverters. Keywords-Photovoltaic energy conversion, Markov reliability models, utility-interactive inverters

Liberzon, Daniel

60

Maximum Constant Boost Control of the Z-Source Inverter  

E-Print Network [OSTI]

Maximum Constant Boost Control of the Z-Source Inverter Miaosen Shen1 , Jin Wang1 , Alan Joseph1 Laboratory Abstract: This paper proposes two maximum constant boost control methods for the Z-source inverter to modulation index is analyzed in detail and verified by simulation and experiment. Keywords- Z-source inverter

Tolbert, Leon M.

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Invertible Symmetric 3 3 Binary Matrices and GQ(2, 4)  

E-Print Network [OSTI]

Invertible Symmetric 3 ? 3 Binary Matrices and GQ(2, 4) Andrea Blunck,1 P´eter L´evay,2 Metod of 27 (disregarding the identity) invertible symmetric 3 ? 3 matrices over GF(2) and the points of invertible symmetric 3 ? 3 matrices over the field GF(2) has 28 elements. The elements different from

Paris-Sud XI, Université de

62

Direct modelling of envelope dynamics in resonant inverters  

E-Print Network [OSTI]

Direct modelling of envelope dynamics in resonant inverters Y. Yin, R. Zane, R. Erickson and J. Glaser A direct dynamic modelling approach is proposed for envelope signals in resonant inverters tank and simplify analysis and controller design. Introduction: High-frequency DC-AC inverters

63

Invertibility preservers on central simple algebras Peter Semrl  

E-Print Network [OSTI]

Invertibility preservers on central simple algebras Peter Semrl Faculty of Mathematics and Physics Kaplansky's problem concerning the structure of linear pre- servers of invertibility in the special case of maps on central simple alge- bras. AMS classification: 15A86, 16K20 Keywords: invertibility preserving

Semrl, Peter

64

What to Do When Your Hessian Is Not Invertible  

E-Print Network [OSTI]

What to Do When Your Hessian Is Not Invertible Alternatives to Model Respecification in Nonlinear is not invertable? The standard textbook advice is to respecify the model, but this is another way of saying for its inventor, German mathematician Ludwig Hesse) must be positive definite and hence invertible

Gill, Jeff

65

Invertibility of Nonlinear Switched Systems Aneel Tanwani and Daniel Liberzon  

E-Print Network [OSTI]

Invertibility of Nonlinear Switched Systems Aneel Tanwani and Daniel Liberzon Abstract-- This article addresses the invertibility problem for switched nonlinear systems affine in controls. The problem and sufficient condition for a switched system to be invertible, which says that the subsystems should

66

Friction and the Inverted Pendulum Stabilization Problem Sue Ann Campbell  

E-Print Network [OSTI]

Friction and the Inverted Pendulum Stabilization Problem Sue Ann Campbell Department of Applied. Keywords: inverted pendulum, friction, feedback control, stability analysis. 1 #12;INTRODUCTION to be the cause of failure of a feedback controller to stabilize a three link inverted pendulum system [2

Campbell, Sue Ann

67

Magnetically and electrically tunable semiconductor quantum waveguide inverter  

E-Print Network [OSTI]

Magnetically and electrically tunable semiconductor quantum waveguide inverter M. J. Gilbert,a) R implementations. We present an electrically tunable semiconductor quantum waveguide implementation of an inverter. On the other hand, if a ``0'' is present in the control bit, then the qubit is inverted. In a recent study

Gilbert, Matthew

68

Experimental Investigation of Microwave Vulnerabilities in CMOS Inverters  

E-Print Network [OSTI]

Experimental Investigation of Microwave Vulnerabilities in CMOS Inverters Agis A. Iliadis effects on single CMOS inverters, the fundamental building block of logic ICs, consisting of an NMOS and a PMOS transistor. The inverters were designed in our group and fabricated in the AMI-1.5µm MOSIS line

Anlage, Steven

69

A Cascade Multilevel Inverter Using a Single DC Source  

E-Print Network [OSTI]

A Cascade Multilevel Inverter Using a Single DC Source Zhong Du1, Leon M. Tolbert2 3, John N inverter can be implemented using only a single DC power source and capacitors. A standard cascade multilevel inverter requires DC sources for 2 + 1 levels. Without requiring transformers, the scheme proposed

Tolbert, Leon M.

70

Supplement to "Power Algorithms for Inverting Laplace Transforms"  

E-Print Network [OSTI]

propose a new class of algorithms for numerically inverting Laplace transforms, called power algorithmsSupplement to "Power Algorithms for Inverting Laplace Transforms" Efstathios Avdis Department, with the parameter choice being tunable to the trans- form being inverted. The powers can be advantageously chosen

Whitt, Ward

71

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....................................................................................... 6 4.1 Inverter Size

72

Non-invertible transformations and spatiotemporal randomness  

E-Print Network [OSTI]

We generalize the exact solution to the Bernoulli shift map. Under certain conditions, the generalized functions can produce unpredictable dynamics. We use the properties of the generalized functions to show that certain dynamical systems can generate random dynamics. For instance, the chaotic Chua's circuit coupled to a circuit with a non-invertible I-V characteristic can generate unpredictable dynamics. In general, a nonperiodic time-series with truncated exponential behavior can be converted into unpredictable dynamics using non-invertible transformations. Using a new theoretical framework for chaos and randomness, we investigate some classes of coupled map lattices. We show that, in some cases, these systems can produce completely unpredictable dynamics. In a similar fashion, we explain why some wellknown spatiotemporal systems have been found to produce very complex dynamics in numerical simulations. We discuss real physical systems that can generate random dynamics.

J. A. Gonzalez; A. J. Moreno; L. E. Guerrero

2006-02-12T23:59:59.000Z

73

Electron Cloud with Inverted Beam Screens  

E-Print Network [OSTI]

We report the results of computer simulations studying the effect of wrongly oriented LHC beam screens on the local electron-cloud heat load and density. At 3.5 or 7-TeV energy and for maximum secondary emission-yield values below 1.5, with the inverted sawtooth orientation about ten times higher heat load is expected than for the standard orientation, and the wrongly oriented sawtooth chambers could lead to a local heat-load bottleneck during the process of surface conditioning at 25-ns bunch spacing. The available cooling margin can be significantly increased by correcting the sawtooth orientations at least for two dipole magnets in LHC arc cells 26 and 32 R3, in order that there be no half-cell cooling loop containing more than one inverted screen.

Maury Cuna, H

2011-01-01T23:59:59.000Z

74

Status and Needs of Power Electronics for Photovoltaic Inverters  

SciTech Connect (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

75

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

1997-01-01T23:59:59.000Z

76

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

77

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

78

Vehicles - ORNL inverter licensed ... | ornl.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism inS-4500IIVasudha Patri MechanicalofVehicles - ORNL inverter licensed

79

Data compression using inverted block codes  

E-Print Network [OSTI]

Fields 2. Minimum Distance and Error Correction 3. Matrix Notation for Codes 4. Cosets, Coset Leaders, and Maximum Likelihood Decoding C. Syndrome Decoding . D. Inversion of Codes E. Distortion Measure for Inverted Block Codes . F. Perfect Codes...+. The average distortion for block code C is found by averaging the word distortion measure of Equation 3. 3 over all codewords (n-tuples) x, so that p (C) = E[ (xlC)] = Q p(x)p. (?x). all x If the codewords are uniformly identically distributed, N...

McClellan, Stan

1991-01-01T23:59:59.000Z

80

Integration of Novel Flux Coupling Motor and Current Source Inverter...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of Novel Flux Coupling Motor and Current Source Inverter Novel Flux Coupling Machine without Permanent Magnets John Hsu, Oak Ridge National Laboratory, Flux Coupling...

Note: This page contains sample records for the topic "turning converter-see inverter" 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

High-Temperature, Air-Cooled Traction Drive Inverter Packaging  

Broader source: Energy.gov (indexed) [DOE]

Air-Cooled Traction Drive Inverter Packaging Madhu Chinthavali Oak Ridge National Laboratory June 10, 2010 Project ID: APE025 This presentation does not contain any proprietary,...

82

Vehicle Technologies Office Merit Review 2014: Next Generation Inverter  

Broader source: Energy.gov [DOE]

Presentation given by General Motors at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about next generation inverter.

83

Integration of Novel Flux Coupling Motor and Current Source Inverter  

Broader source: Energy.gov (indexed) [DOE]

To integrate a non permanent magnet (PM) electric machine and a current source inverter (CSI) *minimizing capacitors *eliminating rare earth materials used in traditional...

84

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

SciTech Connect (OSTI)

Solar ADEPT Project: PV inverters convert DC power generated by modules into usable AC power. IPCs 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 IPCs 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 IPCs $/W manufacturing cost in half, as well as further reduce indirect shipping and installation costs.

None

2012-01-30T23:59:59.000Z

85

10 IAEI NEWS September.October 2009 www.iaei.org connecting the inverter  

E-Print Network [OSTI]

10 IAEI NEWS September.October 2009 www.iaei.org connecting the inverter by John Wiles CONNECTING THE INVERTER CONNECTING THE INVERTER 10 IAEI NEWS September.October 2009 #12;www.iaei.org September.October 2009 IAEI NEWS 11 connecting the inverter C onnecting the utility-interactive inverter prop- erly

Johnson, Eric E.

86

Capacitor Voltage Control in a Cascaded Multilevel Inverter as a Static Var Generator  

E-Print Network [OSTI]

1 Capacitor Voltage Control in a Cascaded Multilevel Inverter as a Static Var Generator M. Li, J. N for a cascaded multilevel inverter to be used for static var compensation. Index Terms-- Multilevel Inverter, Static Var Generator (SVG), Cascade inverter. I. INTRODUCTION Multilevel inverters have gained much

Tolbert, Leon M.

87

Right Turn on Red! | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

benefits for the country, helping us all save money by saving energy. Prior to the 1970's, some states already allowed drivers to turn right on a red light, but many others -...

88

Modelling and Control of an Inverted Pendulum Turbine  

E-Print Network [OSTI]

Modelling and Control of an Inverted Pendulum Turbine Sergi Rotger Griful Kongens Lyngby 2012 IMM. 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

89

Mono inverter Multi parallel PMSM -Structure and Control strategy  

E-Print Network [OSTI]

Mono inverter Multi parallel PMSM - Structure and Control strategy Damien Bidarta , Maria Pietrzak a new and original Mono inverter Multi parallel Permanent Magnet Synchronous Motor (PMSM) system. Experimental results are given for a system with 2 PMSM plugged in parallel. The proposed solution can however

Boyer, Edmond

90

A Segmented Drive Inverter Topology with a Small DC Bus Capacitor  

Broader source: Energy.gov (indexed) [DOE]

weight for inverters. Currently, it contributes - Cost and weight, up to 23% of an inverter - Volume, up to 30% of an inverter * Ability of film capacitors to operate at higher...

91

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework  

E-Print Network [OSTI]

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework invertibility and flatness, dynamical systems are structurally equivalent to some specific cryptographic invertibility, flatness and identifiability of discrete- time switched linear systems are investigated

Paris-Sud XI, Université de

92

A High-Frequency Resonant Inverter Topology With Low-Voltage Stress  

E-Print Network [OSTI]

This paper presents a new switched-mode resonant inverter, which we term the inverter, that is well suited to operation at very high frequencies and to rapid on/off control. Features of this inverter topology include low ...

Rivas, Juan M.

93

Introduction Inverted index Processing Boolean queries Query optimization Web Search and Text Mining  

E-Print Network [OSTI]

Introduction Inverted index Processing Boolean queries Query optimization Web Search and Text Institute of Technology, College of Computing 2011 Gray: Boolean Retrieval 1 / 39 #12;Introduction Inverted index Processing Boolean queries Query optimization Overview 1 Introduction 2 Inverted index 3

Gray, Alexander

94

Does the world need yet another solar inverter concept? Intermediate size inverters have grown; now there is a  

E-Print Network [OSTI]

of the inverter with respect to the economics of solar generated electricity. Nextronex Energy Systems LLC, formed and specifiers, and concluded that the world would benefit from yet another solar inverter concept, one that we a critical interest in the revenue stream, uptime, and operation and maintenance cost of solar projects

King, Roger

95

MODIFYING AN INVERTED LABORATORY MICROSCOPE FOR RAMAN Presented in Partial Fulfillment of the Requirements for  

E-Print Network [OSTI]

MODIFYING AN INVERTED LABORATORY MICROSCOPE FOR RAMAN MICROSCOPY A Thesis Presented in Partial modifications a spectroscopic imaging instrument, a Raman microscope, can be constructed from a common inverted

96

Electric machine and current source inverter drive system  

SciTech Connect (OSTI)

A drive system includes an electric machine and a current source inverter (CSI). This integration of an electric machine and an inverter uses the machine's field excitation coil for not only flux generation in the machine but also for the CSI inductor. This integration of the two technologies, namely the U machine motor and the CSI, opens a new chapter for the component function integration instead of the traditional integration by simply placing separate machine and inverter components in the same housing. Elimination of the CSI inductor adds to the CSI volumetric reduction of the capacitors and the elimination of PMs for the motor further improve the drive system cost, weight, and volume.

Hsu, John S

2014-06-24T23:59:59.000Z

97

Climate Entrepreneurship ...turning an idea into business  

E-Print Network [OSTI]

Climate Entrepreneurship ...turning an idea into business Dr. Anas Sgesser, Director Climate-KIC Switzerland Dr. Regina Vogel, Education Lead Climate-KIC Switzerland Akitaka Fujii, Executive Assistant Climate-KIC Switzerland 20 October 2014 #12;Climate-KIC 2 #12;Climate-KIC 3 ... 1968 you went

Fischlin, Andreas

98

Turning ideas into reality Roberto Cipolla  

E-Print Network [OSTI]

;Magic Mirrors #12;Qualities of an engineer 1. Analytical and technical skills 2. Creative and thinking · Logical thinking #12;Qualities of an engineer 2. Creativity and thinking skills: · Good problemTurning ideas into reality Roberto Cipolla Department of Engineering http

Cipolla, Roberto

99

Mechanical Engineering Turning Ideas into Reality  

E-Print Network [OSTI]

Mechanical Engineering Turning Ideas into Reality EnErgy Environ m Ent HEaltH matEria ls transpo rt u r s e s ? Home The Department Overview The Courses Mechanical Engineering (MEng / BEng) Mechanical Engineering With International Study (MEng / BEng) Aero-Mechanical Engineering (MEng / BEng) #12;tHE DEpartm

Mottram, Nigel

100

Mechanical & Aerospace Engineering Turning Ideas into Reality  

E-Print Network [OSTI]

Mechanical & Aerospace Engineering Turning Ideas into Reality EnErgy Environ m Ent HEaltH mat Overview The Courses Mechanical Engineering (MEng / BEng) Mechanical Engineering With International Study (MEng / BEng) Aero-Mechanical Engineering (MEng / BEng) E N T r y F A Q S A p p l y i n g C a m p u

Mottram, Nigel

Note: This page contains sample records for the topic "turning converter-see inverter" 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

The inverted Lamar sub-basin, Lake Maracaibo, Venezuela: Tectonic evolution and hydrocarbon habitat  

SciTech Connect (OSTI)

In the central part of the Maracaibo basin, integration of recently acquired 3-D seismic and existing geological data has led to the definition of the Lamar sub-basin as an array of partially inverted half grabens which formed during Late Cretaceous and Early to Middle Eocene times as a result of transtensional episodes along older rift structures. This integration exercise has also led to the addition of new reserves in a mature oil province. Six major tectonic phases can be distinguished: (a.) Extension of the existing Paleozoic substrate during Jurassic rifting; (b.) Passive margin tectonic quiescence from Middle to Late Cretaceous; (c.) Paleocene uplift and erosion; (d.) Eocene transtension along reactivated Jurassic lineaments; (e.) Late Eocene to Mid Miocene inversion; (f.) Late Miocene to Recent post inversion and regional tilt. Distinctive tectonically induced unconformities within the Eocene sedimentary fill imply tectonic overprint rather than eustatic controls. The Eocene extensional structures were inverted in a selective manner depending upon their orientation relative to the dominant compressional vector. This in turn resulted in significant hydrocarbon re-migration and a rather complex fluid distribution throughout the area.

Arminio, J.F. [Maraven S.A., Caracas (Venezuela); Growcott, A.M. [Intera Information Technologies, Henley-Upon-Thames, Oxfordshire, (United Kingdom)

1996-08-01T23:59:59.000Z

102

Development of a high-efficiency solar micro-inverter  

E-Print Network [OSTI]

In typical solar power installations, multiple modules are connected to the grid through a single high-power inverter. However, an alternative approach is to connect each solar module directly to the grid through a ...

Hayman, Alexander Khaled

2009-01-01T23:59:59.000Z

103

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

104

Project Invert WP6 Case Studies Case studies  

E-Print Network [OSTI]

, Greece · FEWE ­ Polish Foundation for Energy Efficiency, Poland · FhG-ISI ­ Fraunhofer Institute for Systems and Innovation Research, Germany Contact/Information: web-site: www.invert.at or directly

105

Stabilizing the dual inverted pendulum : a practical approach  

E-Print Network [OSTI]

A dual inverted pendulum system, consisting of two individual pendulums of different lengths on a single cart, was fully designed and implemented as a demonstration of classical control theory. This document contains an ...

Barton, Taylor Wallis

2008-01-01T23:59:59.000Z

106

Triple inverter pierce oscillator circuit suitable for CMOS  

DOE Patents [OSTI]

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

107

A semi-invertible operator Oseledets theorem Cecilia Gonzalez-Tokman  

E-Print Network [OSTI]

A semi-invertible operator Oseledets theorem Cecilia Gonz´alez-Tokman Anthony Quas October 15, 2011 Abstract Semi-invertible multiplicative ergodic theorems establish the existence of an Oseledets splitting for cocycles of non-invertible linear operators (such as transfer operators) over an invertible

Quas, Anthony

108

A Five-Level Three-Phase Hybrid Cascade Multilevel Inverter Using a Single DC Source  

E-Print Network [OSTI]

A Five-Level Three-Phase Hybrid Cascade Multilevel Inverter Using a Single DC Source for a PM 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

Tolbert, Leon M.

109

INVERTIBILITY IN INFINITE-DIMENSIONAL SPACES CHIA-CHUAN TSENG AND NGAI-CHING WONG  

E-Print Network [OSTI]

INVERTIBILITY IN INFINITE-DIMENSIONAL SPACES CHIA-CHUAN TSENG AND NGAI-CHING WONG Abstract. An interesting result of Doyle and Hocking states that a topological n-manifold is invertible if and only is invertible. We shall also discuss the invertibility of other infinite-dimensional objects as well

Wong, Ngai-Ching

110

High Dynamic Performance Programmed PWM Control of a Multilevel Inverter with Capacitor DC Sources  

E-Print Network [OSTI]

High Dynamic Performance Programmed PWM Control of a Multilevel Inverter with Capacitor DC Sources inverter consisting of a stan- dard 3-leg inverter supplied by a DC source and three full H-bridges each reactive voltage to the motor while the standard three leg inverter can supply both reactive and active

Tolbert, Leon M.

111

Some Classes of Invertible Matrices in GF(2) James S. Plank  

E-Print Network [OSTI]

Some Classes of Invertible Matrices in GF(2) James S. Plank Adam L. Buchsbaum Technical Report UT Invertible matrices in GF(2) are important for constructing MDS erasure codes. This paper proves that certain classes of matrices in GF(2) are invertible, plus some additional properties about invertible matrices. 1

Plank, Jim

112

INVERTIBLE FILTER BANKS ON THE 2-SPHERE B.T. Thomas Yeo Wanmei Ou Polina Golland  

E-Print Network [OSTI]

INVERTIBLE FILTER BANKS ON THE 2-SPHERE B.T. Thomas Yeo Wanmei Ou Polina Golland Computer Science to the sphere, many key challenges remain. In this paper, we develop conditions for the invertibility be incorpo- rated into the design of self-invertible axis-symmetric wavelets. Self- invertibility

Golland, Polina

113

Performance Analysis of a Hybrid Asymmetric Multilevel Inverter for High Voltage Active Power Filter Applications  

E-Print Network [OSTI]

Performance Analysis of a Hybrid Asymmetric Multilevel Inverter for High Voltage Active Power voltage-source inverters connected in series (known as cascaded hybrid asymmetric multilevel inverter scheme is developed to allow the operation of the inverter modules at different voltages and switching

Catholic University of Chile (Universidad Católica de Chile)

114

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 Newtons 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

115

Measurement of tool forces in diamond turning  

SciTech Connect (OSTI)

A dynamometer has been designed and built to measure forces in diamond turning. The design includes a 3-component, piezoelectric transducer. Initial experiments with this dynamometer system included verification of its predicted dynamic characteristics as well as a detailed study of cutting parameters. Many cutting experiments have been conducted on OFHC Copper and 6061-T6 Aluminum. Tests have involved investigation of velocity effects, and the effects of depth and feedrate on tool forces. Velocity has been determined to have negligible effects between 4 and 21 m/s. Forces generally increase with increasing depth of cut. Increasing feedrate does not necessarily lead to higher forces. Results suggest that a simple model may not be sufficient to describe the forces produced in the diamond turning process.

Drescher, J.; Dow, T.A.

1988-12-01T23:59:59.000Z

116

Sandia National Laboratories: Officials Turn to Sandia National...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ClimateECResearch & CapabilitiesCapabilitiesOfficials Turn to Sandia National Labs for Help on Huge Sinkhole Officials Turn to Sandia National Labs for Help on Huge Sinkhole...

117

Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car...  

Broader source: Energy.gov (indexed) [DOE]

Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car Designer Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car Designer January 7, 2010 - 4:05pm Addthis...

118

ARM - VAP Product - 10rlprofdep1turn  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUCProductstwrmr Documentation & Plots Technicalrlprofdep1turn Documentation

119

ARM - VAP Product - 10rlprofmr1turn  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUCProductstwrmr Documentation & Plots Technicalrlprofdep1turn

120

2.3-MW Medium-Voltage, Three-Level Wind Energy Inverter Applying a Unique Bus Structure and 4.5-kV Si/SiC Hybrid Isolated Power Modules: Preprint  

SciTech Connect (OSTI)

A high-efficiency, 2.3-MW, medium-voltage, three-level inverter utilizing 4.5-kV Si/SiC (silicon carbide) hybrid modules for wind energy applications is discussed. The inverter addresses recent trends in siting the inverter within the base of multimegawatt turbine towers. A simplified split, three-layer laminated bus structure that maintains low parasitic inductances is introduced along with a low-voltage, high-current test method for determining these inductances. Feed-thru bushings, edge fill methods, and other design features of the laminated bus structure provide voltage isolation that is consistent with the 10.4-kV module isolation levels. Inverter efficiency improvement is a result of the (essential) elimination of the reverse recovery charge present in 4.5-kV Si PIN diodes, which can produce a significant reduction in diode turn-off losses as well as insulated-gate bipolar transistor (IGBT) turn-on losses. The hybrid modules are supplied in industry-standard 140 mm x 130 mm and 190 mm x 130 mm packages to demonstrate direct module substitution into existing inverter designs. A focus on laminated bus/capacitor-bank/module subassembly level switching performance is presented.

Erdman, W.; Keller, J.; Grider, D.; VanBrunt, E.

2014-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Ecosystem Component Characterization "Things don't turn up in this world until somebody turns them up."  

E-Print Network [OSTI]

CHAPTER 6 Ecosystem Component Characterization "Things don't turn up in this world until somebody turns them up." James A. Garfield CONTENTS Overview

Pitt, Robert E.

122

An apparatus for measuring turn-by-turn transverse beam profile in electron storage rings  

SciTech Connect (OSTI)

A new apparatus is designed to measure the beam profile turn-by-turn using synchrotron light. The apparatus consists of optical fibers, photo multiplier tubes and digitizers. It is cost efficient and easy to operate. Monte Carlo simulations have shown that the apparatus has an acceptable resolution. The concept has been tested preliminarily at the SLC damping ring, and a full equipment is being set up at CESR to observe coherent beam-beam phenomenon.

Chen, T.; Siemann, R.H. [Stanford Linear Accelerator Center, CA (United States); Hartill, D.; Smith, S. [Cornell Univ., Ithaca, NY (United States)

1996-06-01T23:59:59.000Z

123

Math 28S Invertibility Criteria Fall 2011 Various criteria which are equivalent to a matrix being invertible are at the heart of linear alge-  

E-Print Network [OSTI]

Math 28S Invertibility Criteria Fall 2011 Various criteria which are equivalent to a matrix being invertible are at the heart of linear alge- bra, because they combine all the ideas from the subject. A is invertible; 3. {a} is linearly independent; 4. {a} spans F; 5. {a} is a basis for F. Theorem 2 Let A = a b c

McClendon, David M.

124

ARM - VAP Product - aerosolbe1turn  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD) by MicrotopsProductsmwravg5mwravg DocumentationProductsaerosolbeaerosolbe1turn Documentation Data

125

Powerpedia Turns Two | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - SeptemberMicroneedles for medical point ofPowerSaver Loan ProgramPoweringTurns Two

126

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

SciTech Connect (OSTI)

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

127

Hamilton's Turns for the Lorentz Group  

E-Print Network [OSTI]

Hamilton in the course of his studies on quaternions came up with an elegant geometric picture for the group SU(2). In this picture the group elements are represented by ``turns'', which are equivalence classes of directed great circle arcs on the unit sphere $S^2$, in such a manner that the rule for composition of group elements takes the form of the familiar parallelogram law for the Euclidean translation group. It is only recently that this construction has been generalized to the simplest noncompact group $SU(1,1) = Sp(2, R) = SL(2,R)$, the double cover of SO(2,1). The present work develops a theory of turns for $SL(2,C)$, the double and universal cover of SO(3,1) and $SO(3,C)$, rendering a geometric representation in the spirit of Hamilton available for all low dimensional semisimple Lie groups of interest in physics. The geometric construction is illustrated through application to polar decomposition, and to the composition of Lorentz boosts and the resulting Wigner or Thomas rotation.

R. Simon; S. Chaturvedi; V. Srinivasan; N. Mukunda

2006-01-10T23:59:59.000Z

128

Evaluation of machining dispersions for turning process  

E-Print Network [OSTI]

In this article we propose to extend the model of simulation of dispersions in turning based on the geometrical specifications. Our study is articulated around two trends of development: the first trend relates to the geometrical model. The geometrical model suggested must allow a follow-up of the geometry of the part during the simulation of machining. It is thus a question of carrying out a systematic treatment of the whole dimensioning and tolerancing process while being based on the principles of the \\DeltaL method. We also planned to integrate this type of specification in the model of simulation of machining suggested. It is more generally a question of extending the traditional model for better taking into account the multi axis specification of coaxiality and perpendicularity on the turned workpieces. The second trend of our study relates to the widening of the field of application of the model. We propose to extend the field of application of the model by taking into account the modifications of several parameters of the manufacturing process plans, likely to involve variations of dispersions.

Arnaud Lefebvre; Valery Wolff

2008-03-03T23:59:59.000Z

129

Improvements in EMC performance of inverter-fed motor drives  

SciTech Connect (OSTI)

An experimental investigation of conducted radio-noise emission from a conventional pulse width modulated (PWM) inverter of medium power feeding an induction motor is described. It is determined that the inverter system generates considerable impulse currents through the power leads feeding the system resulting in serious conducted electromagnetic interference (EMI) problems and significant voltage waveform distortion in the power system. The dominant emission sources in the system are identified. A proposed model of the drive system for the purpose of evaluation of EMI are developed. Several low-cost strategies for improvement in EMC performance of the PWM inverter are then proposed. Experimental results demonstrate that disturbance from the modified system can be dramatically reduced and that the EMC performance of the system has come very close to meeting the IEC CISPR and FCC limits on conducted emissions for digital devices.

Zhong, E.; Lipo, T.A. [Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering

1995-11-01T23:59:59.000Z

130

Hard turning micro-machine tool  

DOE Patents [OSTI]

A micro-scale apparatus for supporting a tool for hard turning comprises a base, a pivot coupled to the base, an actuator coupled to the base, and at least one member coupled to the actuator at one end and rotatably coupled to the pivot at another end. A tool mount is disposed on the at least one member. The at least one member defines a first lever arm between the pivot and the tool mount, and a second lever arm between the pivot and the actuator. The first lever arm has a length that is less than a length of the second lever arm. The actuator moves the tool mount along an arc.

DeVor, Richard E; Adair, Kurt; Kapoor, Shiv G

2013-10-22T23:59:59.000Z

131

Turning Algae into Energy in New Mexico  

ScienceCinema (OSTI)

Los Alamos National Laboratory, as part of the New Mexico Consortium - comprised of New Mexico's major research universities, the Lab, and key industry partners - is conducting research into using algae as a feed stock for a renewable source of fuels, and other products. There are hundreds of thousands of different algae species on Earth. They account for approximately half of the net photosynthesis on the planet, yet they have not been used in any kind of a large scale by humanity, with just a few exceptions. And yet, the biomass is easy to transform into useful products, including fuels, and they contain many other natural products that have high value. In this video Los Alamos and New Mexico State University scientists outline the opportunities and challenges of using science to turn algae into energy.

Sayre, Richard; Olivares, Jose; Lammers, Peter

2014-06-24T23:59:59.000Z

132

Electrodeposited coatings for diamond turning applications  

SciTech Connect (OSTI)

Electrodeposited coatings are attractive for precision machining operations because thick coatings can be economically applied, with good adhesion, to a variety of substrates. Approximately 20 pure metals and a large number of alloys can be deposited from aqueous solutions. Fused salt and organic solvent electrolytes can be used to lengthen the list of metals that can be electrodeposited. However, both the choice of the metallic coating and the control of the plating process are critical for success in precision finishing of electrodeposited coatings. Some preliminary results at the National Institute of Standards and Technology and at the Lawrence Livermore National Laboratory suggest that electrodeposited nickel-phosphorus alloys are excellent coatings for single point diamond turning from the standpoint of material properties and low tool wear. Electrodeposited aluminum and aluminum alloy coatings also merit consideration for precision finishing where weight is an important factor. 10 refs., 6 figs.

Mayer, A.; Bramlett, R.D.; Day, R.D. (Los Alamos National Lab., NM (USA)); Evans, C.J.; Polvani, R.S. (National Inst. of Standards and Technology, Gaithersburg, MD (USA))

1991-01-01T23:59:59.000Z

133

Turning Algae into Energy in New Mexico  

SciTech Connect (OSTI)

Los Alamos National Laboratory, as part of the New Mexico Consortium - comprised of New Mexico's major research universities, the Lab, and key industry partners - is conducting research into using algae as a feed stock for a renewable source of fuels, and other products. There are hundreds of thousands of different algae species on Earth. They account for approximately half of the net photosynthesis on the planet, yet they have not been used in any kind of a large scale by humanity, with just a few exceptions. And yet, the biomass is easy to transform into useful products, including fuels, and they contain many other natural products that have high value. In this video Los Alamos and New Mexico State University scientists outline the opportunities and challenges of using science to turn algae into energy.

Sayre, Richard; Olivares, Jose; Lammers, Peter

2013-07-29T23:59:59.000Z

134

Inverter power module with distributed support for direct substrate cooling  

DOE Patents [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

135

E-Print Network 3.0 - amphoteric water-in-oil self-inverting...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

amphoteric water-in-oil self-inverting Search Powered by Explorit Topic List Advanced Search Sample search results for: amphoteric water-in-oil self-inverting Page: << < 1 2 3 4 5...

136

Turning Waste Into Fuel: How the INEOS Biorefinery Is Changing...  

Office of Environmental Management (EM)

Turning Waste Into Fuel: How the INEOS Biorefinery Is Changing the Clean Energy Game Turning Waste Into Fuel: How the INEOS Biorefinery Is Changing the Clean Energy Game February...

137

WHEN THE BLUE-GREEN WATERS TURN RED  

E-Print Network [OSTI]

WHEN THE BLUE-GREEN WATERS TURN RED Historical Flooding in Havasu Creek, Arizona U.S. GEOLOGICAL OF RECLAMATION #12;WHEN THE BLUE-GREEN WATERS TURN RED Historical Flooding in Havasu Creek, Arizona By THEODORE S

138

Paper Number -1-Simulation model of dispersions in turning process  

E-Print Network [OSTI]

Paper Number -1- Simulation model of dispersions in turning process Wolff Valery 1, Lefebvre Arnaud. In this paper, an extent of the simulation model of dispersions in turning process first exposed in [W1

Paris-Sud XI, Université de

139

Optimal Dispatch of Photovoltaic Inverters in Residential Distribution Systems  

E-Print Network [OSTI]

, reactive power generation/consumption based on monitoring local electrical quantities has been recog- nized method for determining the active- and reactive-power set points for PV inverters in residential systems as a viable option to effect voltage regulation [4], [8]­[12]. However, such reactive power control (RPC

Giannakis, Georgios

140

Design and Control of an Inverter for Photovoltaic Applications  

E-Print Network [OSTI]

Design and Control of an Inverter for Photovoltaic Applications by Søren Bækhøj Kjær Dissertation Assistant. He also taught photovoltaic systems for terrestrial- and space-applications (Power system quality, control and optimized design, for fuel cell and photovoltaic applications. He is currently

Hansen, René Rydhof

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Summary Review of Advanced Inverter Technologies for Residential PV Systems  

E-Print Network [OSTI]

and Energy Reliability As part of Cooperative Agreement No. DE-EE0003507 Under Task 3.1: Photovoltaic Systems of Electricity Delivery and Energy Reliability Under Cooperative Agreement No. DE-EE0003507 Hawai`i Energy Sustainability Program Subtask 3.1 Photovoltaic Systems: Report 2 Summary of Inverter Technologies Submitted

142

A Unified Framework for Numerically Inverting Laplace Joseph Abate  

E-Print Network [OSTI]

A Unified Framework for Numerically Inverting Laplace Transforms Joseph Abate 900 Hammond Road been many applications; e.g., see the survey by Abate et al. (1999) and the textbook treatment by Kao transforms; e.g., see the surveys in Abate and Whitt (1992) and Chapter 19 of Davies (2002), the extensive

Whitt, Ward

143

Optimum Fuel Cell Utilization with Multilevel Inverters Burak Ozpineci1  

E-Print Network [OSTI]

Optimum Fuel Cell Utilization with Multilevel Inverters Burak Ozpineci1 1 Oak Ridge National of Tennessee Knoxville, TN USA Email: tolbert@utk.edu, zdu1@utk.edu Abstract-- Static characteristics of fuel. This inevitable decrease, which is caused by internal losses, reduces the utilization factor of the fuel cells

Tolbert, Leon M.

144

Danfoss Commercial Compressors October 2013 | 2 Inverter compressors  

E-Print Network [OSTI]

#12;Danfoss Commercial Compressors October 2013 | 2 Inverter compressors Geothermal energy taps to improve heat pump efficiency : compressor technology focus Efficiency boost in Ground Source Heat Pump-sized or require additional electrical heaters #12;Danfoss Commercial Compressors October 2013 | 6 What difference

Oak Ridge National Laboratory

145

Separating myths from reality in PV inverter reliability  

E-Print Network [OSTI]

to improving the lifetime and reliability of Enecsys solar micro inverters." · Enphase white paper: "[our technology and not the other? Why can't even microinverter companies agree on this? #12;Switch mode power" stage steers the sine wave to positive & negative lobes #12;The need for storage · With any switchmode

Rollins, Andrew M.

146

Minimal Schemes for Large Neutrino Mixings with Inverted Hierarchy  

E-Print Network [OSTI]

Existing oscillation data point to nonzero neutrino masses with large mixings. We analyze the generic features of the neutrino Majorana mass matrix with inverted hierarchy and construct realistic {\\it minimal schemes} for the neutrino mass matrix that can explain the large (but not maximal) \

Duane A. Dicus; Hong-Jian He; John N. Ng

2002-05-17T23:59:59.000Z

147

Review of PV Inverter Technology Cost and Performance Projections  

SciTech Connect (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

148

Fault Tolerance on Interleaved inverter with Magnetic couplers  

E-Print Network [OSTI]

Fault Tolerance on Interleaved inverter with Magnetic couplers K.Guépratte, D.Frey, P-O.Jeannin, H Electrical Engineering (G2Elab), Thales Systemes Aeroportes Abstract- The paper focuses on a new control strategy for improving the availability of power electronic converters based on interleaved structures

Paris-Sud XI, Université de

149

WEAK SUBINTEGRALITY AND INVERTIBLE MODULES IN GRADED RINGS  

E-Print Network [OSTI]

WEAK SUBINTEGRALITY AND INVERTIBLE MODULES IN GRADED RINGSB=A : B=A ! I (A?, B?). Here A? is the divided power algebra associated with A, which is the ring having, then the homomorphism iB=A : B=A ! I (A?, B?) is an isomorphism. A key new observation used in the proof

Roberts, Leslie

150

Invertible Clipping for Increasing the Power Efficiency of OFDM Amplification  

E-Print Network [OSTI]

Invertible Clipping for Increasing the Power Efficiency of OFDM Amplification Salvatore Ragusa amplification in mobile communication systems. In this paper, we propose a new Peak-to- Average Power Ratio.Louet@supelec.fr Abstract-- Large fluctuations of OFDM signal amplitude rep- resent an important problem for power

Paris-Sud XI, Université de

151

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

152

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

153

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

SciTech Connect (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

154

Inverting Quantum Decoherence by Classical Feedback from the Environment Francesco Buscemi, Giulio Chiribella, and Giacomo Mauro D'Ariano  

E-Print Network [OSTI]

Inverting Quantum Decoherence by Classical Feedback from the Environment Francesco Buscemi, Giulio the en- vironment in order to invert the decoherence process. A completely decohering evolution

D'Ariano, Giacomo Mauro

155

Incremental Cluster-Based Retrieval using Compressed Cluster-Skipping Inverted Files  

E-Print Network [OSTI]

Incremental Cluster-Based Retrieval using Compressed Cluster-Skipping Inverted Files ISMAIL SENGOR ________________________________________________________________________ We propose a unique cluster-based retrieval (CBR) strategy using a new cluster-skipping inverted file for improving query processing efficiency. The new inverted file incorporates cluster membership and centroid

Can, Fazli

156

Origin-Dependent Inverted-Repeat Amplification: A Replication-Based Model for Generating Palindromic  

E-Print Network [OSTI]

Viewpoints Origin-Dependent Inverted-Repeat Amplification: A Replication-Based Model for Generating in different ways--for example, by end-to- end fusion at short inverted repeats, by non-allelic homologous, the specific class of amplicons that consists of interstitial inverted tripli- cations has no completely

Dunham, Maitreya

157

Inverting faces elicits sensitivity to race on the N170 component: A cross-cultural study  

E-Print Network [OSTI]

Inverting faces elicits sensitivity to race on the N170 component: A cross-cultural study: the so-called other-race effect (ORE). Inverting faces impairs recognition more than for any other inverted visual object: the so-called face inversion effect (FIE). Interestingly, the FIE is stronger

Williamson, John

158

INVERTIBLE AND NILPOTENT ELEMENTS IN THE GROUP ALGEBRA OF A UNIQUE PRODUCT GROUP  

E-Print Network [OSTI]

INVERTIBLE AND NILPOTENT ELEMENTS IN THE GROUP ALGEBRA OF A UNIQUE PRODUCT GROUP ERHARD NEHER Abstract. We describe the nilpotent and invertible elements in group alge- bras k[G] for k a commutative. A fundamental problem in the theory of group algebras is to determine their units = invertible elements

Neher, Erhard

159

Aalborg Universitet Frequency Adaptive Selective Harmonic Control for Grid-Connected Inverters  

E-Print Network [OSTI]

Aalborg Universitet Frequency Adaptive Selective Harmonic Control for Grid-Connected Inverters Yang Harmonic Control for Grid-Connected Inverters. IEEE Transactions on Power Electronics, 1-13. 10.1109/TPEL Selective Harmonic Control for Grid-Connected Inverters Yongheng Yang, Student Member, IEEE, Keliang Zhou

Berning, Torsten

160

Using Inverted Lists to Match Structured Text Department of Computer Science  

E-Print Network [OSTI]

Using Inverted Lists to Match Structured Text Sheng Li Department of Computer Science University for the degree of Master of Mathematics in Computer Science at the University of Waterloo. #12;Abstract Inverted database systems. For information re- trieval systems, postings lists use a similar inverted le structure

Waterloo, University of

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Inverting Ultrasonic Data on Solid/Fluid Mixtures for BiotGassmann Parameters  

E-Print Network [OSTI]

Inverting Ultrasonic Data on Solid/Fluid Mixtures for Biot­Gassmann Parameters James G. Berryman Geophysics Department Stanford University Stanford, CA 94305­2215 #12; Inverting Ultrasonic Data on Solid, the values of the slopes are smaller than expected for some rocks. Therefore, the process of inverting

162

Challenging Ubiquitous Inverted Files Arjen P. de Vries1,2  

E-Print Network [OSTI]

Challenging Ubiquitous Inverted Files Arjen P. de Vries1,2 1 CWI, Amsterdam, The Netherlands 2 on highly optimized inverted file structures are generally con- sidered `the' solution for building search presented online. Inverted file structures are widely used in the implementation of stand-alone IR systems

de Vries, Arjen P.

163

The Excess of Small Inverted Repeats in Prokaryotes Emmanuel D. Ladoukakis Adam Eyre-Walker  

E-Print Network [OSTI]

The Excess of Small Inverted Repeats in Prokaryotes Emmanuel D. Ladoukakis ? Adam Eyre+Business Media, LLC 2008 Abstract Recent analyses have shown that there is a large excess of perfect inverted previously tends to underestimate the expected num- ber of inverted repeats. However, this bias is not large

Eyre-Walker, Adam

164

The time-delayed inverted pendulum: Implications for human balance control  

E-Print Network [OSTI]

The time-delayed inverted pendulum: Implications for human balance control John Milton,1 Juan Luis May 2009; published online 29 June 2009 The inverted pendulum is frequently used as a starting point experimental paradigms of time-delayed balance control: 1 mechanical inverted time-delayed pendulum, 2 stick

Milton, John G.

165

Inverted metamorphic sequence in the Sikkim Himalayas: crystallization history, PT gradient and implications  

E-Print Network [OSTI]

Inverted metamorphic sequence in the Sikkim Himalayas: crystallization history, P­T gradient The metapelitic rocks of the Sikkim Himalayas show an inverted metamorphic sequence (IMS) of the complete to be capable of explaining these observations. Key words: Himalayas; inverted Barrovian zones; main central

Ganguly, Jibamitra

166

PWM Inverter Output Filter Cost to Losses Trade Off and Optimal Design  

E-Print Network [OSTI]

PWM Inverter Output Filter Cost to Losses Trade Off and Optimal Design Robert J. Pasterczyk Jean--This paper describes how to design the output filter of a PWM inverter used in a Uninterruptible Power SupplyVA 3-ph. PWM inverter is taken as example. B. Design Constraints Uninterruptible Power Supply (UPS

Paris-Sud XI, Université de

167

Introduction Inverted index Processing Boolean queries Query optimization Course overview Introduction to Information Retrieval  

E-Print Network [OSTI]

Introduction Inverted index Processing Boolean queries Query optimization Course overview Retrieval 1 / 60 #12;Introduction Inverted index Processing Boolean queries Query optimization Course overview Take-away Sch¨utze: Boolean Retrieval 2 / 60 #12;Introduction Inverted index Processing Boolean

Nejdl, Wolfgang

168

INVERTED ECHO SOUNDER DEVELOPMENT G. F. Chaplin and D. Randolph Watts  

E-Print Network [OSTI]

INVERTED ECHO SOUNDER DEVELOPMENT G. F. Chaplin and D. Randolph Watts Graduate School of Oceanography University of Rhode Island Narragansett, RI 02882 ABSTRACT The Inverted Echo Sounder (IES and, consequently, the acoustic travel time through the water column change. The inverted echo sounder

Rhode Island, University of

169

Comparing Inverted Files and Signature Files for Searching a Large Lexicon  

E-Print Network [OSTI]

Comparing Inverted Files and Signature Files for Searching a Large Lexicon BEN CARTERETTE1 , FAZLI, 2003 To appear in Information Processing and Management Abstract Signature files and inverted files, a bit-sliced signature file can be compressed to a smaller size than an inverted file if each n

Can, Fazli

170

Inverted Replication of Vertebrate Mitochondria Miguel M. Fonseca,* David Posada, and D. James Harris*  

E-Print Network [OSTI]

Inverted Replication of Vertebrate Mitochondria Miguel M. Fonseca,* à David Posada,à and D. James, we identified 2 fishes, Albula glossodonta and Bathygadus antrodes, with inverted compositional of inverted mitochondrial replication, caused by an inversion of the CR. These findings support the strand

Posada, David

171

Fabrication of inverted opal ZnO photonic crystals by atomic layer deposition  

E-Print Network [OSTI]

Fabrication of inverted opal ZnO photonic crystals by atomic layer deposition M. Scharrer, X. Wu, A method to fabricate so-called "inverted opal" structures which have the long-range order, high filling into opal or inverted opal backbones.3,5,13,14 Recently, atomic layer deposition ALD has been pro- posed

Cao, Hui

172

The invertibility of 2 2 operator matrices Junjie Huang, Junfeng Sun, Alatancang Chen, Carsten Trunk1  

E-Print Network [OSTI]

The invertibility of 2 ? 2 operator matrices Junjie Huang, Junfeng Sun, Alatancang Chen, Carsten Trunk1 November 11, 2014 Abstract In this paper the properties of right invertible row operators, i decomposition. Using this decomposition, we characterize the invertibility of a 2 ? 2 operator matrix

Knobloch,Jürgen

173

Visualization and Animation of Inverter-Driven Induction Motor A. P. Sakis Meliopoulos, W. Gao  

E-Print Network [OSTI]

1 Visualization and Animation of Inverter-Driven Induction Motor Operation A. P. Sakis Meliopoulos of South Carolina Columbia, SC 29208 Abstract: This paper discusses a new model of an inverter- driven induction motor that enables direct animation and visualization of the inverter and motor operation

174

PERFORMANCE OF AN INVERTED SPUTTER SOURCE G. VOURVOPOULOS, O. TOPIKOGLOU and A. ASTHENOPOULOS  

E-Print Network [OSTI]

1463 PERFORMANCE OF AN INVERTED SPUTTER SOURCE G. VOURVOPOULOS, O. TOPIKOGLOU and A. ASTHENOPOULOS sources. Abstract. 2014 An inverted sputter source manufactured locally was installed on the Demokritos a sputter source on the Demokritos Tan- dem. The choice of the inverted sputter source from among

Boyer, Edmond

175

Every invertible matrix is diagonally equivalent to a matrix with distinct eigenvalues  

E-Print Network [OSTI]

Every invertible matrix is diagonally equivalent to a matrix with distinct eigenvalues Man-Duen Choi , Zejun Huang , Chi-Kwong Li , and Nung-Sing Sze§ Abstract We show that for every invertible n?n complex matrix A there is an n?n diagonal invertible D such that AD has distinct eigenvalues. Using

Li, Chi-Kwong

176

Incremental Cluster-Based Retrieval Using Compressed Cluster-Skipping Inverted Files  

E-Print Network [OSTI]

15 Incremental Cluster-Based Retrieval Using Compressed Cluster-Skipping Inverted Files ISMAIL cluster-based retrieval (CBR) strategy using a new cluster-skipping inverted file for improving query processing efficiency. The new inverted file incorporates cluster member- ship and centroid information along

Ulusoy, ?zgür

177

Fundamental Frequency Modulated Multilevel Inverter for Three-Phase Stand-Alone  

E-Print Network [OSTI]

Fundamental Frequency Modulated Multilevel Inverter for Three-Phase Stand-Alone Photovoltaic-6472, USA Abstract - This paper presents a fundamental frequency modulated multilevel inverter scheme connected PV arrays, a five-level diode-clamped multilevel inverter (DCMLI) generating fundamental

Tolbert, Leon M.

178

Query Processing and Inverted Indices in Shared-Nothing Text Document Information Retrieval Systems  

E-Print Network [OSTI]

Query Processing and Inverted Indices in Shared-Nothing Text Document Information Retrieval Systems by the organization of the inverted index. This paper compares the performance impact on query processing of various physical organizations for inverted lists. We present a new probabilistic model of the database and queries

Zimmerman, John

179

Symmetrical and Asymmetrical H-Bridge Multilevel Inverter for DTC Induction Motor Drive  

E-Print Network [OSTI]

Symmetrical and Asymmetrical H-Bridge Multilevel Inverter for DTC Induction Motor Drive Automotive--Several works have been reported in the literature on multilevel inverters topologies, control techniques drives associated to three-phase multilevel inverter. This paper presents then a comparison study

Paris-Sud XI, Université de

180

On Invertibility of Switched Linear Systems L. Vu and D. Liberzon  

E-Print Network [OSTI]

On Invertibility of Switched Linear Systems L. Vu and D. Liberzon Coordinated Science Laboratory.S.A. Email: {linhvu, liberzon}@control.csl.uiuc.edu Abstract-- We address a new problem--the invertibility. In solving the invertibility problem, we introduce the concept of singular pairs for two systems. We give

Liberzon, Daniel

Note: This page contains sample records for the topic "turning converter-see inverter" 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.


181

HIGH-LEVEL MULTI-STEP INVERTER OPTIMIZATION, USING A MINIMUM NUMBER OF POWER TRANSISTORS.  

E-Print Network [OSTI]

HIGH-LEVEL MULTI-STEP INVERTER OPTIMIZATION, USING A MINIMUM NUMBER OF POWER TRANSISTORS. Juan 56-41-246-999 e-mail lmoran@renoir.die.udec.cl ABSTRACT Multilevel inverters with a large number-5]. Multi-level inverters can operate not only with PWM techniques but also with amplitude modulation (AM

Catholic University of Chile (Universidad Católica de Chile)

182

A LOGICAL INVERTED TAXONOMY OF SORTING ALGORITHMS S.M. Merritt K.K. Lau  

E-Print Network [OSTI]

A LOGICAL INVERTED TAXONOMY OF SORTING ALGORITHMS S.M. Merritt K.K. Lau School of Computer Science­ mational programming and automatic program synthesis provided the insight that led to Merritt's inverted taxonomy of sorting algorithms. This provides a logical basis for the inverted taxonomy and expands

Lau, Kung-Kiu

183

Inverted Repeat Structure of the Human Genome: The X-Chromosome Contains a Preponderance of  

E-Print Network [OSTI]

Inverted Repeat Structure of the Human Genome: The X-Chromosome Contains a Preponderance of Large, Highly Homologous Inverted Repeats That Contain Testes Genes Peter E. Warburton,1,4 Joti Giordano,1 Fanny performed the first genome-wide analysis of the Inverted Repeat (IR) structure in the human genome, using

Warburton, Peter E.

184

INVERTIBLE SUBSTITUTIONS WITH A COMMON PERIODIC HUI RAO AND ZHI-YING WEN  

E-Print Network [OSTI]

INVERTIBLE SUBSTITUTIONS WITH A COMMON PERIODIC POINT HUI RAO AND ZHI-YING WEN Abstract. We characterize the invertible substitutions over a two-letter alphabet which share a common periodic point (or for some n 1. A substitution is said invertible if it is an automorphism of the free group F generated

Rao, Hui

185

Deformation-induced inverted metamorphic eld gradients: an example from the southeastern Canadian Cordillera  

E-Print Network [OSTI]

Deformation-induced inverted metamorphic ®eld gradients: an example from the southeastern Canadian allochthon and Monashee complex, exhibits an inverted metamorphic ®eld gradient. New data presented preserving evidence of strongly diachronous deformation and an apparent inverted metamorphism. # 1999

Gibson, Dan

186

A generalized 3D inverted pendulum model to represent human normal walking  

E-Print Network [OSTI]

A generalized 3D inverted pendulum model to represent human normal walking Sophie Sakka IRCCy,lacouture}@univ-poitiers.fr Abstract-- This paper compares different inverted pendulum models to represent the stance phase of human adapted to pathological walking as the walking symmetry hypothesis -needed to build classical inverted

Paris-Sud XI, Université de

187

CONTINUOUS INVERTIBILITY AND STABLE QML ESTIMATION OF THE EGARCH(1,1) MODEL  

E-Print Network [OSTI]

CONTINUOUS INVERTIBILITY AND STABLE QML ESTIMATION OF THE EGARCH(1,1) MODEL OLIVIER WINTENBERGER Abstract. We introduce the notion of continuous invertibility on a compact set for volatility models driven Estimator (QMLE) when the optimization procedure is done on a continuously invertible domain. This approach

Paris-Sud XI, Université de

188

Inverter Minimization in Multi-Level Logic Networks Department of ECE  

E-Print Network [OSTI]

Inverter Minimization in Multi-Level Logic Networks Alok Jain Department of ECE Carnegie Mellon Pittsburgh, PA 15213 Abstract In this paper, we look at the problem of inverter minimization in multi approach takes a more global view and maps the problem of inverter minimization into a problem of removing

Bryant, Randal E.

189

Fault Diagnosis System for a Multilevel Inverter Using a Principal Component Neural Network Surin Khomfoi  

E-Print Network [OSTI]

Fault Diagnosis System for a Multilevel Inverter Using a Principal Component Neural Network Surin system in a multilevel-inverter using a compact neural network is proposed in this paper. It is difficult to diagnose a multilevel-inverter drive (MLID) system using a mathematical model because MLID systems consist

Tolbert, Leon M.

190

Analysis and Design of a Novel Three-Level LLCC Inverter Supplying an Airborne Piezoelectric  

E-Print Network [OSTI]

Analysis and Design of a Novel Three-Level LLCC Inverter Supplying an Airborne Piezoelectric Brake on the investigation of a novel single-phase three-level PWM inverter in the kW power range, feeding a high power multi suit best to the needs of ultrasonic motors has been conducted. A resonant inverter with LLCC

Paderborn, Universität

191

Introduction Inverting Construction Y1 Results Classification of Linear Codes with Prescribed  

E-Print Network [OSTI]

Introduction Inverting Construction Y1 Results Classification of Linear Codes with Prescribed / 14 #12;Introduction Inverting Construction Y1 Results Introduction Motivation Gaps between lower with automorphism of order 7! ­ joint work with G. Nebe) Inspired by Y. Edel, J. Bierbrauer, Inverting construction

Dettweiler, Michael

192

Optimum Inverter Sizing in Consideration of Irradiance Pattern and PV Incentives  

E-Print Network [OSTI]

Optimum Inverter Sizing in Consideration of Irradiance Pattern and PV Incentives Song Chen* Peng Li Boston, Massachusetts, USA Abstract-- This paper proposes a general method of sizing the inverter for a PV system. The method evaluates effects of PV incentive policies, inverter efficiency curves

Lehman, Brad

193

Inverting geodetic time series with a principal component analysis-based inversion method  

E-Print Network [OSTI]

Inverting geodetic time series with a principal component analysis-based inversion method A. P (2010), Inverting geodetic time series with a principal component analysis-based inversion method, J; Cohen, 1999]. This formulation is linear and easily inverted using standard algorithms. The distribution

Avouac, Jean-Philippe

194

Inverting the Turing Jump in Complexity Theory Stephen A. Fenner \\Lambda  

E-Print Network [OSTI]

Inverting the Turing Jump in Complexity Theory Stephen A. Fenner \\Lambda Computer Science Department University of Southern Maine Abstract This paper investigates the invertibility of certain analogs­jump operators are not invertible, i.e., there is a PSPACE­hard (resp. EXP­hard) set that is not p­ time Turing

Fenner, Stephen

195

Beyond Synexpression Relationships: Local Clustering of Time-shifted and Inverted Gene  

E-Print Network [OSTI]

Beyond Synexpression Relationships: Local Clustering of Time-shifted and Inverted Gene Expression an inverted relationship. Here, we propose a new method, which we call local clus- tering, for identifying these time-delayed and inverted relationships. It is related to conventional gene-expression clustering

Yu, Haiyuan

196

Inverting Matrices In class, we proved that if T : V W is linear, then  

E-Print Network [OSTI]

Inverting Matrices In class, we proved that if T : V W is linear, then dim V = dim) The nullspace of T is {0}. (3) The image T(V ) is all of W. (4) T is invertible. (Recall that (1) and (2 we can represent any T by a matrix, it suffices to consider inverting matrices. The method is very

White, Brian

197

Structure of Invertible (Bi)infinite Totally Positive Matrices* Mathematics Research Center  

E-Print Network [OSTI]

Structure of Invertible (Bi)infinite Totally Positive Matrices* C. de Boor Mathematics Research Haifa, Israel Submitted by Hans Schneider ABSTRACT An &invertible nonfinite totally positive matrix the property that all finite sections of A principal with respect to this diagonal are invertible

Pinkus, Allan

198

Inverted Index Compression for Scalable Image Matching David M. Chen1  

E-Print Network [OSTI]

Inverted Index Compression for Scalable Image Matching David M. Chen1 , Sam S. Tsai1 , Vijay Abstract To perform fast image matching against large databases, a Vocabulary Tree (VT) uses an inverted index that maps from each tree node to database images which have visited that node. The inverted index

Girod, Bernd

199

Advanced Inverter Functions to Support High Levels of Distributed Solar: Policy and Regulatory Considerations (Brochure)  

SciTech Connect (OSTI)

This paper explains how advanced inverter functions (sometimes called 'smart inverters') contribute to the integration of high levels of solar PV generation onto the electrical grid and covers the contributions of advanced functions to maintaining grid stability. Policy and regulatory considerations associated with the deployment of advanced inverter functions are also introduced.

Not Available

2014-11-01T23:59:59.000Z

200

11-level Cascaded H-bridge Grid-tied Inverter Interface with Solar Panels  

E-Print Network [OSTI]

11-level Cascaded H-bridge Grid-tied Inverter Interface with Solar Panels Faete Filho, Yue Cao multilevel DC-AC grid-tied inverter. Each inverter bridge is connected to a 200 W solar panel. OPAL-RT lab match. A novel SPWM scheme is proposed in this paper to be used with the solar panels that can account

Tolbert, Leon M.

Note: This page contains sample records for the topic "turning converter-see inverter" 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

The Impact of Irradiance Time Behaviors on Inverter Sizing and Design  

E-Print Network [OSTI]

events in which the photovoltaic (PV) array outputs more power than the rated power of the inverter of inverter. This implies that clear sky irradiance locations might have noticeably different power losses, the inverter can still handle full input power without derating. The research contributions of this paper

Lehman, Brad

202

Development of New Three-Level Current-Source Inverter for Grid Connected Photovoltaic System  

E-Print Network [OSTI]

Development of New Three-Level Current-Source Inverter for Grid Connected Photovoltaic System-phase three-level current source inverter (CSI) driven by a single gate-drive power supply in both chopper and inverter, and its feasibility on grid connected photovoltaic system application. Using this new topology

Fujimoto, Hiroshi

203

Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter  

E-Print Network [OSTI]

Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter based in the same grid interface conditions by means of impedance-based analysis and modeling. Unlike the single grid connected inverter, it is found that multiple parallel connected inverters and grid impedance can

Bak, Claus Leth

204

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

DOE Patents [OSTI]

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

205

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

DOE Patents [OSTI]

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

206

Application of the lie-transform perturbation theory for the turn-by-turn data analysis  

SciTech Connect (OSTI)

Harmonic analysis of turn-by-turn BPM data is a rich source of information on linear and nonlinear optics in circular machines. In the present report the normal form approach first introduced by R. Bartolini and F. Schmidt is extended on the basis of the Lie-transform perturbation theory to provide direct relation between the sources of perturbation and observable spectra of betatron oscillations. The goal is to localize strong perturbing elements, find the resonance driving terms--both absolute value and phase--that are necessary for calculation of the required adjustments in correction magnet circuits: e.g. skew-quadrupoles for linear coupling correction. The theory is nonlinear and permits to analyze higher order effects, such as coupling contribution to beta-beating and nonlinear sum resonances.

Alexahin, Y.; /Fermilab

2006-06-01T23:59:59.000Z

207

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

SciTech Connect (OSTI)

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

208

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

SciTech Connect (OSTI)

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

209

Spectra of Discrete Schrdinger Operators with Primitive Invertible Substitution Potentials  

E-Print Network [OSTI]

We study the spectral properties of discrete Schr\\"odinger operators with potentials given by primitive invertible substitution sequences (or by Sturmian sequences whose rotation angle has an eventually periodic continued fraction expansion, a strictly larger class than primitive invertible substitution sequences). It is known that operators from this family have spectra which are Cantor sets of zero Lebesgue measure. We show that the Hausdorff dimension of this set tends to $1$ as coupling constant $\\lambda$ tends to $0$. Moreover, we also show that at small coupling constant, all gaps allowed by the gap labeling theorem are open and furthermore open linearly with respect to $\\lambda$. Additionally, we show that, in the small coupling regime, the density of states measure for an operator in this family is exact dimensional. The dimension of the density of states measure is strictly smaller than the Hausdorff dimension of the spectrum and tends to $1$ as $\\lambda$ tends to $0$.

May Mei

2014-07-02T23:59:59.000Z

210

Optimization of the Oktay-Kronfeld Action Conjugate Gradient Inverter  

E-Print Network [OSTI]

Improving the Fermilab action to third order in heavy quark effective theory yields the Oktay-Kronfeld action, a promising candidate for precise calculations of the spectra of heavy quark systems and weak matrix elements relevant to searches for new physics. We have optimized the bi-stabilized conjugate gradient inverter in the SciDAC QOPQDP library and are developing a GPU code. The action is rewritten and the needed gauge-link combinations are precalculated. In tests with a MILC coarse lattice, this procedure accelerates the inverter by a factor of four. The remaining floating-point operations are mostly simple matrix multiplications between gauge links and fermion vectors, which we accelerate by more than an order of magnitude by using CUDA. Further gains could be achieved by using QUDA.

Yong-Chull Jang; Jon A. Bailey; Weonjong Lee; Carleton DeTar; Mehmet B. Oktay; Andreas S. Kronfeld

2013-11-21T23:59:59.000Z

211

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

212

Design considerations for inverters in fluid flow control  

E-Print Network [OSTI]

. 12 PWM spectrum generation 3. 13 Line and phase voltages of PWM inverter 3. 14 PWM output current with Induction Motor 3. 15 Harmonics elimination technique 3. 16 Adaptive PWM with bang-bang control 3. 17 Adaptive PWM control block diagram . 3... output with induction motor load. ~ Sine-triangulation PWM (Sinusoidal PWM) ~ Harmonic Elimination Principle ~ Adaptive Current Control PWM (Hysterisis or Bang-Bang Control) Sine-triangulation PWM The sine-triangulation PWM technique is most widely...

Guggari, Mallappa Ishwarappa

1989-01-01T23:59:59.000Z

213

892 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 57, NO. 3, MARCH 2010 Hybrid Cascaded H-Bridge Multilevel-Inverter  

E-Print Network [OSTI]

-Bridge Multilevel-Inverter Induction-Motor-Drive Direct Torque Control for Automotive Applications Farid Khoucha cascaded H-bridge multilevel inverter, where each phase of the inverter can be implemented using a dc source, which would be available from fuel cells, batteries, or ultracapacitors. This inverter provides

Brest, Université de

214

Inductorless DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle  

E-Print Network [OSTI]

Inductorless DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle boost inverter for EV and HEV applications. Currently available power inverter systems for HEVs use a DC- DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV

Tolbert, Leon M.

215

Abstract --In this study, elimination of harmonics in a five-level diode-clamped multilevel inverter (DCMLI) has been  

E-Print Network [OSTI]

inverter (DCMLI) has been implemented by using fundamental modulation switching. The proposed method, and multilevel inverter. I. INTRODUCTION The problem of eliminating harmonics in switching inverters has been the focus of research for many years. The current trend of modulation control for multilevel inverters

Tolbert, Leon M.

216

Highly efficient inverted top emitting organic light emitting diodes using a transparent top electrode with color stability on viewing angle  

SciTech Connect (OSTI)

We report a highly efficient phosphorescent green inverted top emitting organic light emitting diode with excellent color stability by using the 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile/indium zinc oxide top electrode and bis(2-phenylpyridine)iridium(III) acetylacetonate as the emitter in an exciplex forming co-host system. The device shows a high external quantum efficiency of 23.4% at 1000?cd/m{sup 2} corresponding to a current efficiency of 110?cd/A, low efficiency roll-off with 21% at 10?000?cd/m{sup 2} and low turn on voltage of 2.4?V. Especially, the device showed very small color change with the variation of ?x?=?0.02, ?y?=?0.02 in the CIE 1931 coordinates as the viewing angle changes from 0 to 60. The performance of the device is superior to that of the metal/metal cavity structured device.

Kim, Jung-Bum; Lee, Jeong-Hwan; Moon, Chang-Ki; Kim, Jang-Joo, E-mail: jjkim@snu.ac.kr [Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Korea, Republic of)

2014-02-17T23:59:59.000Z

217

LMA MSW Solution from the Inverted Hierarchical Model of Neutrinos  

E-Print Network [OSTI]

We examine whether the inverted hierarchical model of neutrinos is compatible with the explanation of the large mixing angles (LMA)MSW solution of the solar neutrino problem. The left-handed Majorana neutrino mass matrix for the inverted hierarchical model, is generated through the seesaw mechanism using the diagonal form of the Dirac neutrino mass matrix and the non-diagonal texture of the right-handed Majorana mass matrix. In a model independent way, we construct a specific form of the charged lepton mass matrix having a special structure in 1-2 block, which contribution to the leptonic mixing (MNS) matrix leads to the predictions $\\sin^{2}2\\theta_{12}=0.8517$, $\\sin^{2}2\\theta_{23}=0.9494$, and $|V_{e3}|=0.159$ at the unification scale. These predictions are found to be consistent with the LMA MSW solution of the solar neutrino problem. The inverted hierarchical model is also found to be stable against the quantum radiative corrections in the MSSM. A numerical analysis of the renormalisation group equations (RGEs) in the MSSM shows a mild decrease of the mixing angles with the decrease of energy scale and the corresponding values of the neutrino mixings at the top-quark mass scale are found as $\\sin^{2}2\\theta_{12}=0.8472$, $\\sin^{2}2\\theta_{23}=0.9399$, $|V_{e3}|=0.1509$ respectively.

Mahadev Patgiri; N. Nimai Singh

2001-12-08T23:59:59.000Z

218

Local prediction of turning points of oscillating time series  

E-Print Network [OSTI]

For oscillating time series, the prediction is often focused on the turning points. In order to predict the turning point magnitudes and times it is proposed to form the state space reconstruction only from the turning points and modify the local (nearest neighbor) model accordingly. The model on turning points gives optimal prediction at a lower dimensional state space than the optimal local model applied directly on the oscillating time series and is thus computationally more efficient. Monte Carlo simulations on different oscillating nonlinear systems showed that it gives better predictions of turning points and this is confirmed also for the time series of annual sunspots and total stress in a plastic deformation experiment.

D. Kugiumtzis

2008-08-06T23:59:59.000Z

219

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

SciTech Connect (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

220

Invertible coupled KdV and coupled Harry Dym hierarchies  

E-Print Network [OSTI]

In this paper we discuss the conditions under which the coupled KdV and coupled Harry Dym hierarchies possess inverse (negative) parts. We further investigate the structure of nonlocal parts of tensor invariants of these hierarchies, in particular, the nonlocal terms of vector fields, conserved one-forms, recursion operators, Poisson and symplectic operators. We show that the invertible cKdV hierarchies possess Poisson structures that are at most weakly nonlocal while coupled Harry Dym hierarchies have Poisson structures with nonlocalities of the third order.

Maciej Blaszak; Krzysztof Marciniak

2013-02-03T23:59:59.000Z

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221

Inverter R&D | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergy Health andofIan KalinResearch,Introducing the All-StarSAE HydrogenInverter

222

Inverter Testing at Sandia National Laboratories* Jerry W. Ginn  

Office of Scientific and Technical Information (OSTI)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinan antagonist Journal Article: Crystal structureComposite--FORRemarksHEATINGI _ _++, +++_+Inverter

223

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

224

SunShot-funded Advanced Inverter Testing Enables 2,500 Solar...  

Energy Savers [EERE]

Laboratory engineer Greg Martin (from left) works with Solectria engineers Jonathon Smith and Jihua Ma testing Solectria's smart inverter at the Energy Systems Integration...

225

Electroless nickel: an important coating for diamond turning applications  

SciTech Connect (OSTI)

Diamond turning is the use of a single-point diamond tool on a precision lathe under very precisely controlled machine and environmental conditions to fabricate finished components. With a machine presently available at LLNL a part accuracy between 0.05 and 1.0 ..mu..m (2 and 40 millionths of an inch) is obtainable. Coatings offer significant advantages for diamond turning applications inasmuch as they can be applied to lightweight substrates such as aluminum or beryllium. One of the most used coatings for diamond turning applications is electroless nickel. Purpose of this paper is to document case histories of such applications and suggest areas for future work.

Dini, J.W.

1980-09-24T23:59:59.000Z

226

Diamond turning of Si and Ge single crystals  

SciTech Connect (OSTI)

Single-point diamond turning studies have been completed on Si and Ge crystals. A new process model was developed for diamond turning which is based on a critical depth of cut for plastic flow-to-brittle fracture transitions. This concept, when combined with the actual machining geometry for single-point turning, predicts that {open_quotes}ductile{close_quotes} machining is a combined action of plasticity and fracture. Interrupted cutting experiments also provide a meant to directly measure the critical depth parameter for given machining conditions.

Blake, P.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

227

Observation of diamond turned OFHC copper using Scanning Tunneling Microscopy  

SciTech Connect (OSTI)

Diamond turned OFHC copper samples have been observed within the past few months using the Scanning Tunneling Microscope. Initial results have shown evidence of artifacts which may be used to better understand the diamond turning process. The STM`s high resolution capability and three dimensional data representation allows observation and study of surface features unobtainable with conventional profilometry systems. Also, the STM offers a better quantitative means by which to analyze surface structures than the SEM. This paper discusses findings on several diamond turned OFHC copper samples having different cutting conditions. Each sample has been cross referenced using STM and SEM.

Grigg, D.A.; Russell, P.E.; Dow, T.A.

1988-12-01T23:59:59.000Z

228

Fault Current Contribution from Single-Phase PV Inverters  

SciTech Connect (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

229

When to Turn Off Your Lights | Department of Energy  

Office of Environmental Management (EM)

of when to turn off lights depends on the type of lights and the price of electricity. | Photo courtesy of iStockphoto.comkyoshino. The cost effectiveness of when...

230

Solving the corner-turning problem for large interferometers  

E-Print Network [OSTI]

The so-called corner-turning problem is a major bottleneck for radio telescopes with large numbers of antennas. The problem is essentially that of rapidly transposing a matrix that is too large to store on one single device; ...

Lutomirski, Andrew

231

Abstract--A reconfiguration technique for multilevel inverters incorporating a diagnostic system based on neural  

E-Print Network [OSTI]

of multilevel inverters for electric drive application have been discussed in [1]. The cascaded MLID is a general fit for large automotive all-electric drives because of the high VA rating possible and because]. A possible structure of a three-phase cascaded multilevel inverter drive for electric vehicle is illustrated

Tolbert, Leon M.

232

Optimal Inverter VAR Control in Distribution Systems with High PV Penetration  

E-Print Network [OSTI]

and the net benefits, taking into account the additional cost of inverter losses when operating at non systems. Solar energy is highly intermittent and this introduces several challenges to existing utility is to demonstrate the benefits of inverter var control on a fast timescale to mitigate rapid and large voltage

Low, Steven H.

233

Fault Diagnosis System for a Multilevel Inverter Using a Neural Network Surin Khomfoi Leon M. Tolbert  

E-Print Network [OSTI]

such as photovoltaic, wind, and fuel cells can be easily interfaced to the multilevel inverter system for a high power multilevel inverter systems are utilized in high power applications, the reliability of the power electronics introduced remedial control strategies soon after failure occurrences; therefore, system reliability

Tolbert, Leon M.

234

IEEE TRANSACTIONS ON POWER ELECTRONICS 1 A Hybrid Power Control Concept for PV Inverters with Reduced  

E-Print Network [OSTI]

- cept for grid-connected Photovoltaic (PV) inverters. The control strategy is based on either a Maximum concept. Index Terms--Photovoltaic inverters, constant power genera- tion, maximum power point tracking, efficiency, thermal loading, reliability. I. INTRODUCTION MAXIMUM Power Point Tracking (MPPT) is effective

Kerekes, Tamas

235

PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control  

E-Print Network [OSTI]

PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control Bekhera Tabbache proposes a fault-tolerant control scheme for PWM inverter-fed induction motor-based electric vehicles and simulations on an electric vehicle are carried-out using a European urban driving cycle to assess the FTC

Paris-Sud XI, Universit de

236

The Fabrication of an Inverter using Rubrene Single Crystal Organic Transistors  

E-Print Network [OSTI]

understanding of the technology, leading to higher quality advanced applications. The Inverter Circuit Good Bad, Sendai, Japan Conclusions and Future Work: Fabrication of the Inverter: Characterization of Devices: Acknowledgements: I would like to thank Rice University's NanoJapan Program, which was generously funded by a grant

237

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

E-Print Network [OSTI]

solar cells S. Chambon, E. Destouesse, B. Pavageau, L. Hirsch, and G. Wantz Citation: J. Appl. Phys. 112. Related Articles Power losses in bilayer inverted small molecule organic solar cells Appl. Phys. Lett. 101, 233903 (2012) Thin-film encapsulation of inverted indium-tin-oxide-free polymer solar cells by atomic

Paris-Sud XI, Université de

238

Growth of vertically aligned ZnO nanowalls for inverted polymer solar cells  

E-Print Network [OSTI]

Growth of vertically aligned ZnO nanowalls for inverted polymer solar cells Zhiqiang Liang a,n a School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China b May 2013 Keywords: Inverted polymer solar cells Zinc oxide Nanowalls Aqueous solution growth a b s t r

Cao, Guozhong

239

Hybrid Power Filter with Reduced Inverter Power Rating Bartosz Kdra*1  

E-Print Network [OSTI]

Hybrid Power Filter with Reduced Inverter Power Rating Bartosz Kdra*1 Tomasz Krzeszowiak*1 Wojciech inverter power rating reduction. This topology is compared with a pure active solution and another hybrid of the power rating and the cost of a hybrid power filter. The results obtained in simulations are proven

Bak, Claus Leth

240

Transient Analysis of a CMOS Inverter Driving Resistive Interconnect Kevin T. Tang and Eby G. Friedman  

E-Print Network [OSTI]

are characterized by the th power law model. In order to emphasize the nonlinear behavior of a CMOS inverterTransient Analysis of a CMOS Inverter Driving Resistive Interconnect Kevin T. Tang and Eby G. Friedman Department of Electrical and Computer Engineering University of Rochester Rochester, New York

Friedman, Eby G.

Note: This page contains sample records for the topic "turning converter-see inverter" 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

A Novel Low Cost Solar Central Inverters Topology With 99.2 % Efficiency Heiko Preckwinkel and  

E-Print Network [OSTI]

range. In this contribution, a new topology for central inverters connected to the medium-voltage grid and lower cost. Most of the new topologies that found their way to the market belong to a lower power range inverters. In this power range, a lot of topologies are used to meet the high market demands. Examples

Paderborn, Universität

242

UPDATE ON SIC-BASED INVERTER TECHNOLOGY Abstract This paper presents a study of Silicon  

E-Print Network [OSTI]

development of power devices is a critical aspect of the power electronic industry along with new topologies temperature SiC based inverters for automotive and power system applications. Research involves work on highUPDATE ON SIC-BASED INVERTER TECHNOLOGY Abstract ­ This paper presents a study of Silicon Carbide

Tolbert, Leon M.

243

An Advanced Induction Machine Model for Predicting Inverter-Machine Interaction  

E-Print Network [OSTI]

An Advanced Induction Machine Model for Predicting Inverter-Machine Interaction [31 [41 [51 [6] [7 saturntion d d d d d d d d d d d d d d d d d d d d d d d Leakage inductance saturation as a function of flux- tion machine model specifically designed for use with inverter models to study machin

Chapman, Patrick

244

Design of a Robust Digital Current Controller for a Grid Connected Interleaved Inverter  

E-Print Network [OSTI]

Design of a Robust Digital Current Controller for a Grid Connected Interleaved Inverter M. A for a three- phase voltage source grid-connected interleaved inverter. Each phase consists of 6 half of electrical sources include fuel cells, solar cells, wind turbines, flywheel, and batteries. Most

245

Abstract-This paper investigates four different short circuit fault conditions which can occur for an inverter-fed perma-  

E-Print Network [OSTI]

for an inverter-fed perma- nent magnet synchronous motor (PMSM) with buried mag- nets. The fault conditions Condition #... Inverter PM machine (at steady state) N Short circuit fault conditions of a buried PMSM

Jantsch, Axel

246

Design, implementation, and verification of a multipurpose, flexible, three-phase back-to-back voltage-source inverter  

E-Print Network [OSTI]

In this thesis, I designed, implemented, and verified a multi-purpose,three-phase back-to- back voltage source inverter for grid connected applications. This inverter features extensive hardware protection, opto-isolation ...

Chai, Elaina T

2014-01-01T23:59:59.000Z

247

Inverter Eligibility Listing Procedure for Solar Electric Incentive Programs Updated 6/2/14 Senate Bill 1 (SB1) defines the solar incentive programs for California, and inverters must be listed on  

E-Print Network [OSTI]

(Maximum Continuous Output Power, Conversion Efficiency, and Tare Losses) and weighted inverter efficiencyInverter Eligibility Listing Procedure for Solar Electric Incentive Programs Updated 6/2/14 Senate Bill 1 (SB1) defines the solar incentive programs for California, and inverters must be listed

248

Non-invertibility of Multiple-Scattered QELSS Spectra  

E-Print Network [OSTI]

We consider the spectrum S(q,t) and field correlation function f(q,t) of light quasielastically scattered from diffusing optical probes in complex viscoelastic fluids. Relationships between the single-scattering f_1(q,t) and the multiple-scattering f_m(t) are examined. We show that it is fundamentally impossibly to invert f_m(t) to obtain f_1(q,t) or particle displacement moments , except with assumptions that are certainly not correct in complex, viscoelastic fluids. For diffusing dilute probes in viscoelastic fluids, f_1(q,t) is determined by all even moments , n > 0$, of the particle displacement X; this information is lost in f_m(t). In the special case of monodisperse probes in a true simple fluid, f_1(q,t) can be obtained from f_m(t), but only because the functional form of f_1(q,t) is already known.

George D. J. Phillies

2005-09-18T23:59:59.000Z

249

An Invertible Linearization Map for the Quartic Oscillator  

E-Print Network [OSTI]

The set of world lines for the non-relativistic quartic oscillator satisfying Newton's equation of motion for all space and time in 1-1 dimensions with no constraints other than the "spring" restoring force is shown to be equivalent (1-1-onto) to the corresponding set for the harmonic oscillator. This is established via an energy preserving invertible linearization map which consists of an explicit nonlinear algebraic deformation of coordinates and a nonlinear deformation of time coordinates involving a quadrature. In the context stated, the map also explicitly solves Newton's equation for the quartic oscillator for arbitrary initial data on the real line. This map is extended to all attractive potentials given by even powers of the space coordinate. It thus provides classes of new solutions to the initial value problem for all these potentials.

Robert L. Anderson

2012-04-03T23:59:59.000Z

250

HISQ inverter on Intel Xeon Phi and NVIDIA GPUs  

E-Print Network [OSTI]

The runtime of a Lattice QCD simulation is dominated by a small kernel, which calculates the product of a vector by a sparse matrix known as the "Dslash" operator. Therefore, this kernel is frequently optimized for various HPC architectures. In this contribution we compare the performance of the Intel Xeon Phi to current Kepler-based NVIDIA Tesla GPUs running a conjugate gradient solver. By exposing more parallelism to the accelerator through inverting multiple vectors at the same time we obtain a performance 250 GFlop/s on both architectures. This more than doubles the performance of the inversions. We give a short overview of both architectures, discuss some details of the implementation and the effort required to obtain the achieved performance.

O. Kaczmarek; C. Schmidt; P. Steinbrecher; Swagato Mukherjee; M. Wagner

2014-09-04T23:59:59.000Z

251

ELECTROSTATIC MODELING OF THE JEFFERSON LABORATORY INVERTED CERAMIC GUN  

SciTech Connect (OSTI)

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

252

CEBAF 200 kV Inverted Electron Gun  

SciTech Connect (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

253

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

254

An Inverted Co-Flow Diffusion Flame for Producing Soot  

SciTech Connect (OSTI)

We developed an inverted, co-flow, methane/air/nitrogen burner that generates a wide range of soot particles sizes and concentrations. By adjusting the flow rates of air, methane, and nitrogen in the fuel, the mean electric mobility diameter and number concentration are varied. Additional dilution downstream of the flame allows us to generate particle concentrations spanning those produced by spark-ignited and diesel engines: particles with mean diameters between 50 and 250 nm and number concentrations from 4.7 {center_dot} 10{sup 4} to 10{sup 7} cm{sup -3}. The range of achievable number concentrations, and therefore volume concentrations, can be increased by a factor of 30 by reducing the dilution ratio. These operating conditions make this burner valuable for developing and calibrating diagnostics as well as for other studies involving soot particles.

Stipe, Christopher B.; Higgins, Brian S.; Lucas, Donald; Koshland, Catherine P.; Sawyer, Robert F.

2005-06-21T23:59:59.000Z

255

Inverted Berezinskii-Kosterlitz-Thouless singularity and high-temperature algebraic order in an Ising model on a scale-free hierarchical-lattice small-world network  

E-Print Network [OSTI]

Inverted Berezinskii-Kosterlitz-Thouless singularity and high-temperature algebraic order radically changes: We find a highly unusual phase transi- tion, namely an inverted Berezinskii

Thirumalai, Devarajan

256

Modeling the Capacity of Left-Turn and Through Movement Considering Left-Turn Blockage and Spillback at Signalized Intersection with Short Left-Turn Bay  

E-Print Network [OSTI]

the vehicles in the queue in the current cycle. ?????? 10ij )c y c l ei n a r r i v a l s(P r o bp im CkPim 2nd situation: Left-turning queue carryover will take place in the next cycle. C ijmPijm ??????? )c y c l ei n a r r i v a l s(Pr o bp ij...

Cho, Kyoung Min

2010-10-12T23:59:59.000Z

257

Proceedings of the 2008 International Conference on Electrical Machines Paper ID 1433 Hybrid Cascaded H-Bridge Multilevel Inverter Motor  

E-Print Network [OSTI]

Cascaded H-Bridge Multilevel Inverter Motor Drive DTC Control for Electric Vehicles F. Khoucha1,2 , S reference is then generated using a hybrid cascaded H-bridge multilevel inverter, where each phase of the inverter can be implemented using a DC source, which would be available from fuel cells, batteries

Paris-Sud XI, Université de

258

Design and Realization of Autonomous Power CMOS Single Phase Inverter and Rectifier for Low Power Conditioning Applications  

E-Print Network [OSTI]

Design and Realization of Autonomous Power CMOS Single Phase Inverter and Rectifier for Low Power operate as an inverter or as a rectifier in a wide range of power flows and input voltages. Three of the inverter reaches up to 92% as a function of input voltage with these conditions. The second experimental

Paris-Sud XI, Université de

259

Inverted List Kinetic Monte Carlo with Rejection ap-plied to Directed Self-Assembly of Epitaxial Growth  

E-Print Network [OSTI]

Inverted List Kinetic Monte Carlo with Rejection ap- plied to Directed Self-Assembly of Epitaxial of subsequently deposited material using a kinetic Monte Carlo algorithm that combines the use of inverted lists finding is that the relative performance of the inverted list algorithm improves with increasing system

Schulze, Tim

260

MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER OF THREE.  

E-Print Network [OSTI]

MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER. #12;MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER, Concepción, Chile ABSTRACT A multi-stage inverter using three-state converters is being analyzed

Catholic University of Chile (Universidad Católica de Chile)

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Performance of Inverted Indices in Shared-Nothing Distributed Text Document Information Retrieval SystemsPublished in PDIS '93  

E-Print Network [OSTI]

Performance of Inverted Indices in Shared-Nothing Distributed Text Document Information Retrieval document re- trieval systems is strongly in uenced by the organization of the inverted index. This paper compares the perfor- mance impact on query processing of various physical organizations for inverted lists

Zimmerman, John

262

CURRENT SOURCING ISOLATED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben-Yaakov, Senior Member, IEEE  

E-Print Network [OSTI]

CURRENT SOURCING ISOLATED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high inverters where the small disturbance at the line voltage may lead to current run away and consequently

263

Inverted fluvial features in the Aeolis/Zephyria Plana region, Mars: Formation mechanism and initial paleodischarge estimates  

E-Print Network [OSTI]

Click Here for Full Article Inverted fluvial features in the Aeolis/Zephyria Plana region, Mars/Zephyria Plana (AZP) region of Mars has been previously hypothesized to be inverted fluvial features, although ridges suggests some criteria that may be used to identify inverted fluvial features formed by lava

Perfect, Ed

264

Effects of normal and abnormal visual experience on the development of opposing aftereffects for upright and inverted  

E-Print Network [OSTI]

for upright and inverted faces Rachel A. Robbins,1,4 Daphne Maurer,1,3 Alexandra Hatry,2 Gizelle Anzures2 of upright and inverted faces in patients who missed early visual experience because of bilateral congenital. Adults showed the expected opposing aftereffects for upright and inverted faces. Ten-year-olds showed

Maurer, Daphne M.

265

Copyright 01990 by the Genetics Society of America Synapsis-MediatedFusion of Free DNA Ends Forms Inverted Dimer  

E-Print Network [OSTI]

Inverted Dimer Plasmids in Yeast Sam Kunes, David Botstein' and Maurice S. Fox Department of Biology plasmid DNA and the endsof the plasmid do not share homology with the yeast genome, circular inverted of genetically marked plasmids, we show that two plasmid molecules are required to form an inverted dimerplasmid

Botstein, David

266

Highmobility inverted selectively doped heterojunctions Hadas Shtrikman, M. Heiblum, K. Seo, D. E. Galbi, and L. Osterling  

E-Print Network [OSTI]

Highmobility inverted selectively doped heterojunctions Hadas Shtrikman, M. Heiblum, K. Seo, D. E in inverted GaAsAlGaAs heterojunctions Appl. Phys. Lett. 52, 1268 (1988); 10.1063/1.99176 High mobility: 132.76.50.6 On: Thu, 10 Apr 2014 16:05:40 #12;High-mobility inverted selectively doped heterojunctions

Heiblum, Mordehai "Moty"

267

THE SELF-ADJUSTING CURRENT-FED PUSH-PULL PARALLEL RESONANT INVERTER AS A HIGH FREQUENCY AC BUS DRIVER  

E-Print Network [OSTI]

. The power inverter is based on a Current-Fed Push-Pull Parallel-Resonant Inverter (CFPPRI), which includes power eliminates some of the conversion units, it poses new design challenges [1]: (a) ElectromagneticTHE SELF-ADJUSTING CURRENT-FED PUSH-PULL PARALLEL RESONANT INVERTER AS A HIGH FREQUENCY AC BUS

268

A SiC MOSFET Based Inverter for Wireless Power Transfer Applications  

SciTech Connect (OSTI)

In a wireless power transfer (WPT) system, efficiency of the power conversion stages is crucial so that the WPT technology can compete with the conventional conductive charging systems. Since there are 5 or 6 power conversion stages, each stage needs to be as efficient as possible. SiC inverters are crucial in this case; they can handle high frequency operation and they can operate at relatively higher temperatures resulting in reduces cost and size for the cooling components. This study presents the detailed power module design, development, and fabrication of a SiC inverter. The proposed inverter has been tested at three center frequencies that are considered for the WPT standardization. Performance of the inverter at the same target power transfer level is analyzed along with the other system components. In addition, another SiC inverter has been built in authors laboratory by using the ORNL designed and developed SiC modules. It is shown that the inverter with ORNL packaged SiC modules performs simular to that of the inverter having commercially available SiC modules.

Onar, Omer C [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Ning, Puqi [Chinese Academy of Sciences (CAS)] [Chinese Academy of Sciences (CAS); White, Cliff P [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

2014-01-01T23:59:59.000Z

269

Turn-of-the-nut tightening of anchor bolts  

E-Print Network [OSTI]

progressive tightening tests were performed in order to monitor the stress ranges occurring in the bolt at various locations of interest at various degrees of turn-of-the-nut tightness. Tests were performed on six diameters of anchor bolt ranging from 1 to 2...

Richards, Jason Halbert

2004-09-30T23:59:59.000Z

270

Brief Communication 809 Photoactivation turns green fluorescent protein red  

E-Print Network [OSTI]

Brief Communication 809 Photoactivation turns green fluorescent protein red Michael B. Elowitz gene was first cloned, the Aequorea victoria green fluorescent protein (GFP) has become a powerful tool- wavelength (red) fluorescence has remained elusive. Here we describe a red-emitting, green

Elowitz, Michael

271

Microbes turn mud into electricity By Paula Hartman Cohen  

E-Print Network [OSTI]

compounds, such as toluene, to electricity. Lovley says this suggests that some Geobacters can be usedMicrobes turn mud into electricity By Paula Hartman Cohen News Office staff microorganisms can transform organic matter commonly found at the bottom of the ocean into electrical energy

Lovley, Derek

272

Being Interactive oogle's popularity has turned link analysis  

E-Print Network [OSTI]

Being Interactive Deep Web Structure G oogle's popularity has turned link analysis into a major the user has specialized information needs. DeepWeb Our current understanding of Web structure is based the so-called surface Web, which consists, loosely speaking, of interlinked HTML pages. The deep Web

273

A Preliminary Cost Study of the Dual Mode Inverter Controller  

SciTech Connect (OSTI)

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

274

Analysis, Design, and Operation of a Spherical Inverted-F Antenna  

E-Print Network [OSTI]

This thesis presents the analysis, design, and fabrication of a spherical inverted-F antenna (SIFA). The SIFA consists of a spherically conformal rectangular patch antenna recessed into a quarter section of a metallic sphere. The sphere acts as a...

McDonald, Jacob J.

2010-07-14T23:59:59.000Z

275

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

SciTech Connect (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

276

Design for an invertible water bottle to facilitate cleaning and promote sustainable water bottle usage  

E-Print Network [OSTI]

The goal of this thesis is to explore the design of a reusable water bottle that can be inverted to expose the inside. Being able to directly touch the entire inside of the product could facilitate cleaning and consequently ...

Metlitz, Matthew S

2014-01-01T23:59:59.000Z

277

Inverter Load Rejection Over-Voltage Testing: SolarCity CRADA...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Inverter Load Rejection Over-Voltage Testing SolarCity CRADA Task 1a Final Report A. Nelson, A. Hoke, and S. Chakraborty National Renewable Energy Laboratory J. Chebahtah, T. Wang,...

278

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

E-Print Network [OSTI]

system as the inverter power supply may vary. For example, interface of solar panels or fuel cell. The output voltage is then processed by a DSP unit that uses the signals that command the switches

Tolbert, Leon M.

279

Exploring the Neutrinoless Double Beta Decay in the Inverted Neutrino Hierarchy with Bolometric Detectors  

E-Print Network [OSTI]

Exploring the Neutrinoless Double Beta Decay in the InvertedC. Giunti, Neutrinoless double-beta decay. A brief review,el- ements for neutrinoless double-beta decay and double-

Artusa, D. R.

2014-01-01T23:59:59.000Z

280

Beta Test Plan for Advanced Inverters Interconnecting Distributed Resources with Electric Power Systems  

SciTech Connect (OSTI)

This document provides a preliminary (beta) test plan for grid interconnection systems of advanced inverter-based DERs. It follows the format and methodology/approach established by IEEE Std 1547.1, while incorporating: 1. Upgraded tests for responses to abnormal voltage and frequency, and also including ride-through. 2. A newly developed test for voltage regulation, including dynamic response testing. 3. Modified tests for unintentional islanding, open phase, and harmonics to include testing with the advanced voltage and frequency response functions enabled. Two advanced inverters, one single-phase and one three-phase, were tested under the beta test plan. These tests confirmed the importance of including tests for inverter dynamic response, which varies widely from one inverter to the next.

Hoke, A.; Chakraborty, S.; Basso, T.; Coddington, M.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

A Segmented Drive Inverter Topology with a Small DC Bus Capacitor  

Broader source: Energy.gov (indexed) [DOE]

White, Larry Seiber , Zhenxian Liang, Mike Jenkins * Powerex, UQM Inverter targets * Power density: 13.4 kWl (2020 target) * Specific power: 12 kWkg (2015 target) * Cost: 5...

282

Commercialization of a 2.5kW Utility Interactive Inverter for Distributed Generation  

SciTech Connect (OSTI)

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

283

A multilevel energy buffer and voltage modulator for grid-interfaced micro-inverters  

E-Print Network [OSTI]

Micro-inverters operating into the single-phase grid from solar photovoltaic (PV) panels or other low-voltage sources must buffer the twice-line-frequency variations between the energy sourced by the PV panel and that ...

Chen, Minjie

284

An inverted pressurized water reactor design with twisted-tape swirl promoters  

E-Print Network [OSTI]

An Inverted Fuel Pressurized Water Reactor (IPWR) concept was previously investigated and developed by Paolo Ferroni at MIT with the effort to improve the power density and capacity of current PWRs by modifying the core ...

Nguyen, Nghia T. (Nghia Tat)

2014-01-01T23:59:59.000Z

285

978-1-4244-2800-7/09/$25.00 2009 IEEE ICIEA 2009 Efficiency of SiC JFET-Based Inverters  

E-Print Network [OSTI]

978-1-4244-2800-7/09/$25.00 ©2009 IEEE ICIEA 2009 Efficiency of SiC JFET-Based Inverters Hui Zhang-phase full-bridge inverter power loss models based on experimental data are established and used to estimate inverter efficiency. The impact of load power, temperature, and switching frequency on inverter efficiency

Tolbert, Leon M.

286

770 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 42, NO. 3, MAY/JUNE 2006 Constant Boost Control of the Z-Source Inverter to  

E-Print Network [OSTI]

Control of the Z-Source Inverter to Minimize Current Ripple and Voltage Stress Miaosen Shen, Student-control methods for the Z-source inverter, which can obtain maximum voltage gain at any given modulation index--Pulsewidth modulation (PWM), voltage boost, Z-source inverter. I. INTRODUCTION IN A traditional voltage-source inverter

Tolbert, Leon M.

287

A A L B O R G U N I V E R S I T Y Finishing report for the `SolcelleInverter' project  

E-Print Network [OSTI]

-Module is an electrical product and is the combination of a single module and a single power electronic inverter-Module Inverter W.3 Analysis of Possible Solutions for Inverter W.4 Development And Simulation of New Topologies W-03-05 (Automatic updated) Path: U:\\SolcelleInverter\\Word\\SOTA.doc Contact: M.Sc.E.E. ­ Power Electronics Developer

288

A A L B O R G U N I V E R S I T Y Design of Inverters for the PHOTONERGY project  

E-Print Network [OSTI]

-Module is an electrical product and is the combination of a single module and a single power electronic inverter Solutions for Inverter W.4 Development And Simulation of New Topologies W.5 Selection of Topology W.6 Design: U:\\SolcelleInverter\\Word\\Design of DC-AC Inverter_04022003.doc Contact: M.Sc.E.E., Power Electronics

289

Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial...  

Broader source: Energy.gov (indexed) [DOE]

Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial Mentorship Program Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial Mentorship Program...

290

Analysis of the influence of tool dynamics in diamond turning  

SciTech Connect (OSTI)

This report describes the progress in defining the role of machine and interface dynamics on the surface finish in diamond turning. It contains a review of literature from conventional and diamond machining processes relating tool dynamics, material interactions and tool wear to surface finish. Data from experimental measurements of tool/work piece interface dynamics are presented as well as machine dynamics for the DTM at the Center.

Fawcett, S.C.; Luttrell, D.E.; Keltie, R.F.

1988-12-01T23:59:59.000Z

291

Use of diamond-turned mirrors for synchrotron radiation (SR)  

SciTech Connect (OSTI)

The diamond turning technique has great interest for users of synchrotron radiation because of its ability to produce surfaces of arbitrary shape. It also has the advantage of being well adapted to producing metal optics. These are of interest because they lend themselves to water cooling and hence represent one approach to the problem of high synchrotron radiation power loadings on optical surfaces. The optical figure produced by diamond turning is generally adequate for synchrotron radiation applications. The main difficulty centers around the question of smoothness. Diamond turned surfaces must receive a final polish after machining before they are sufficiently smooth for use with ultra-violet or x-ray radiation. The manufacturing stages can be carried out by various groups in the optics industry and the National Synchrotron Light Source has procured a considerable number of mirrors and is having them polished for use on the vuv storage ring. At the time of writing one mirror has been completed and evaluated and we give the results for this and discuss the indications for the future. The important measurement of the r.m.s. height of the surface roughness has given a value of 3 +- 0.9A using total integrated scatter of visible light at normal incidence.

Howells, M.R.; Takacs, P.Z.

1981-01-01T23:59:59.000Z

292

CEBAF 200 kV Inverted Electron Gun  

SciTech Connect (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

293

Turn Your Halloween Pumpkins Into Power | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatusButlerTransportation6/14/11 Page 1 of 17TurbinesTurning

294

ARM - VAP Product - aerich2nf1turn  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD) by MicrotopsProductsmwravg5mwravg Documentation Data Management FacilityProductsaerinfaerich2nf1turn

295

TurningPoint Evaluation Results | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNGInternationalTechnologyDepartmentStorageDepartment ofJanuary 08,Turning on

296

Turn Motors Off When Not in Use | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of EnergyTheDepartment of Energy andJanuaryTurn Motors Off

297

As summer turns to fall, a new school year begins  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICEAmesApplication2Argonne National4ArtificialAs summer turns

298

Self-excited vibrations in turning: cutting moment analysis  

E-Print Network [OSTI]

This work aims at analysing the moment effects at the tool tip point and at the central axis, in the framework of a turning process. A testing device in turning, including a six-component dynamometer, is used to measure the complete torsor of the cutting actions in the case of self-excited vibrations. Many results are obtained regarding the mechanical actions torsor. A confrontation of the moment components at the tool tip and at the central axis is carried out. It clearly appears that analysing moments at the central axis avoids the disturbances induced by the transport of the moment of the mechanical actions resultant at the tool tip point. For instance, the order relation between the components of the forces is single. Furthermore, the order relation between the moments components expressed at the tool tip point is also single and the same one. But at the central axis, two different order relations regarding moments are conceivable. A modification in the rolling moment localization in the (y, z) tool plan is associated to these two order relations. Thus, the moments components at the central axis are particularly sensitive at the disturbances of machining, here the self-excited vibrations.

Olivier Cahuc; Jean-Yves K'Nevez; Alain Grard; Philippe Darnis; Gatan Albert; Claudiu F. Bisu; Cline Grard

2010-07-06T23:59:59.000Z

299

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

SciTech Connect (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

300

Direct power control of grid connected PV systems with three level NPC inverter  

SciTech Connect (OSTI)

This paper presents the control of a three-level Neutral Point Clamped (NPC) voltage source inverter for grid connected photovoltaic (PV) systems. The control method used is the Extended Direct Power Control (EDPC), which is a generic approach for Direct Power Control (DPC) of multilevel inverters based on geometrical considerations. Maximum Power Point Tracking (MPPT) algorithms, that allow maximal power conversion into the grid, have been included. These methods are capable of extracting maximum power from each of the independent PV arrays connected to each DC link voltage level. The first one is a conventional MPPT which outputs DC link voltage references to EDPC. The second one is based on DPC concept. This new MPPT outputs power increment references to EDPC, thus avoiding the use of a DC link voltage regulator. The whole control system has been tested on a three-level NPC voltage source inverter connected to the grid and results confirm the validity of the method. (author)

Alonso-Martinez, Jaime; Eloy-Garcia, Joaquin; Arnaltes, Santiago [Dept. of Electrical Engineering, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganes, Madrid (Spain)

2010-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

A new technique to reject dc-link voltage ripple in PWM inverters  

E-Print Network [OSTI]

to acknowledge the support of my husband and parents. TA. BLE OF CONTENTS CHAPTER I INTRODUCTION Page I. l Inverter Power Supplies 1. 2 Output Voltage Control 1. 2. 1 Control Of Voltage Supplied To The Inverter I. 2. 2 Control Of Voltage Within... and output of Stage 3 78 34 Exact solution of the switching angle trajectories for harmonic elimination with voltage control (M). 85 CHAPTER I INTRODUCTION Finding ways to control the flow of electricity has been a. goal of inventors and scientists...

Shireen, Wajiha

1990-01-01T23:59:59.000Z

302

An Improved Fault-Tolerant Control Scheme for PWM Inverter-Fed Induction Motor-Based EVs  

E-Print Network [OSTI]

and simulations on an electric vehicle are carried-out using a European urban driving cycle to show for such systems. In particular, voltage source inverters are a key component of these electric motor drive systems of an electric vehicle on the variable-speed ac drives and particularly on the power inverter is rapidly

Paris-Sud XI, Université de

303

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

304

IEEE POWER ELECTRONICS LETTERS, VOL. 2, NO. 2, JUNE 2004 51 Digital Phase Control for Resonant Inverters  

E-Print Network [OSTI]

. In this letter, we present and verify a new concept for direct digital phase control of resonant invertersIEEE POWER ELECTRONICS LETTERS, VOL. 2, NO. 2, JUNE 2004 51 Digital Phase Control for Resonant Inverters Yan Yin, Student Member, IEEE, and Regan Zane, Member, IEEE Abstract--This letter presents

305

Obstacle detection and mapping in low-cost, low-power multi-robot systems using an Inverted  

E-Print Network [OSTI]

Obstacle detection and mapping in low-cost, low-power multi-robot systems using an Inverted with constrained memory capacity and processing power, and is called the Inverted Particle Filter. This method has circuits. An important benefit of this is reduced power consumption opening for new battery-powered

Paris-Sud XI, Université de

306

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

E-Print Network [OSTI]

of these multilevel inverters for this new niche. I. BACKGROUND The development of electric and hybrid-electric vehicles will offer many new opportunities and challenges to the power electronics industry, especially inverters to meet the high power demands (>250 kW) required of them. Development of electric drive trains

Tolbert, Leon M.

307

The inverter is a major component of photovoltaic (PV) systems either autonomous or grid connected. It affects the  

E-Print Network [OSTI]

and a variety of photovoltaic modules. The PV systems range in size from 2.5 to 3.6 kilowatts. The purposeABSTRACT The inverter is a major component of photovoltaic (PV) systems either autonomous or grid. INTRODUCTION For any grid tied photovoltaic (PV) system, the inverter is the essential piece of equipment

Oregon, University of

308

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

SciTech Connect (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

309

Guidelines for left-turn bays at unsignalized access locations on arterial roadways  

E-Print Network [OSTI]

It has long been recognized that effective access management along arterial streets can alleviate traffic congestion. A major goal within access management is to limit the speed differential between turning and through vehicles. Left-turn bays...

Hawley, Patrick Emmett

1994-01-01T23:59:59.000Z

310

LLCC-PWM Inverter for Driving High-Power Piezoelectric Actuators  

E-Print Network [OSTI]

and high dynamic behavior of LLCC PWM inverter, the whole power supply shows an optimal performance vibration systems such as bond sonotrodes, where none or small reactive power is delivered at the operating output transformer and actuators can be rated only with respect to the real power. 2. Due to the PWM

Paderborn, Universitt

311

Small Inverter-Interfaced Distributed Energy Resources for Reactive Power Support  

E-Print Network [OSTI]

to provide reactive power support. I. INTRODUCTION Electrical generators connected to ac power grids mustSmall Inverter-Interfaced Distributed Energy Resources for Reactive Power Support Alejandro D. Dom´inguez-Garc´ia, Christoforos N. Hadjicostis, Philip T. Krein, and Stanton T. Cady Department of Electrical and Computer

Liberzon, Daniel

312

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.

313

Entropy, Invertibility and Variational Calculus of the Adapted Shifts on Wiener space  

E-Print Network [OSTI]

In this work we study the necessary and sufficient conditions for a positive random variable whose expectation under the Wiener measure is one, to be represented as the Radon-Nikodym derivative of the image of the Wiener measure under an adapted perturbation of identity with the help of the associated innovation process. We prove that the innovation conjecture holds if and only if the original process is almost surely invertible. We also give variational characterizations of the invertibility of the perturbations of identity and the representability of a positive random variable whose total mass is equal to unity. We prove in particular that an adapted perturbation of identity $U=I_W+u$ satisfying the Girsanov theorem, is invertible if and only if the kinetic energy of $u$ is equal to the entropy of the measure induced with the action of $U$ on the Wiener measure $\\mu$, in other words $U$ is invertible iff $$ \\half \\int_W|u|_H^2d\\mu=\\int_W \\frac{dU\\mu}{d\\mu}\\log\\frac{dU\\mu}{d\\mu}d\\mu >. $$ otherwise the l.h.s. is always strictly greater than the r.h.s. The relations with the Monge-Kantorovitch measure transportation are also studied. An application of these results to a variational problem related to large deviations is also given.

Ali Sleyman stnel

2009-03-23T23:59:59.000Z

314

Invertible Mappings of Nonlinear PDEs to Linear PDEs Through Admitted Conservation Laws  

E-Print Network [OSTI]

An algorithmic method using conservation law multipliers is introduced that yields necessary and sufficient conditions to find invertible mappings of a given nonlinear PDE to some linear PDE and to construct such a mapping when it exists. Previous methods yielded such conditions from admitted point or contact symmetries of the nonlinear PDE. Through examples, these two linearization approaches are contrasted.

Stephen C. Anco; George Bluman; Thomas Wolf

2008-01-26T23:59:59.000Z

315

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.

316

Qualification of Class 1E static battery charges and inverters for nuclear power generating stations  

SciTech Connect (OSTI)

This standard describes methods for qualifying static battery chargers and inverters for Class 1E installations in environmentally controlled areas outside containment in nuclear power generating stations. The purpose of this standard is to provide specific procedures to meet the requirements of IEEE Std. 323-1974.

Not Available

1981-01-01T23:59:59.000Z

317

Prior List of Eligible Inverters Valid Only Until March 31, 2005  

E-Print Network [OSTI]

Prior List of Eligible Inverters Valid Only Until March 31, 2005 California Energy Commission Yes NA Ballard Power Systems Corporation EPC-PV-208- 30kW Utility Interactive 208V 30kW PV Power Converter System 30000 95 No NA Ballard Power Systems Corporation EPC-PV-208- 75kW Utility Interactive 75k

318

Abstract-A hybrid cascaded multilevel inverter application for renewable energy resources including a reconfiguration  

E-Print Network [OSTI]

be achieved by using the microgrid concept as discussed in [2]. Data center or telecommunication buildings an alternative topology of hybrid cascaded multilevel inverter applied to a low voltage dc microgrid, micro-turbine, wind turbine and fuel cell put forward many promising applications with high efficiency

Tolbert, Leon M.

319

Design and development of a DC-DC converter for a fuel cell inverter system  

E-Print Network [OSTI]

This thesis outlines the design and development of a DC-DC converter for a fuel cell inverter application. The proposed DC-DC converter was designed and tested at Texas A&M to meet the specifications laid down for the '2001 Future Energy Challenge...

Gopinath, Rajesh

2001-01-01T23:59:59.000Z

320

p Channel thin lm transistor and complementary metaloxidesilicon inverter made of microcrystalline silicon  

E-Print Network [OSTI]

p Channel thin ®lm transistor and complementary metal±oxide±silicon inverter made ®lm transistor (TFT) made of directly deposited microcrystalline silicon (lc-Si). The lc-Si channel°C. By integrating this p TFT on a single lc-Si ®lm with an n channel TFT, we fabricated

Note: This page contains sample records for the topic "turning converter-see inverter" 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

A 7-Level Single DC Source Cascaded H-Bridge Multilevel Inverters Control  

E-Print Network [OSTI]

vehicles or hybrid electric vehicles where each phase of the inverter can be implemented using only HE electric vehicles (EV) and Hybrid Electric Vehicles (HEV) currently seem to constitute, the motor drive, comprising the electric motor, the power converter, and the electronic controller

Paris-Sud XI, Université de

322

Independent Control of Two Induction Motors Fed by a Five Legs PWM Inverter for Electric Vehicles  

E-Print Network [OSTI]

Independent Control of Two Induction Motors Fed by a Five Legs PWM Inverter for Electric Vehicles B. NOMENCLATURE EV = Electric vehicle; IM = Induction motor; IFOC = Indirect field oriented control; PWM= Pulse force; Fcr = Climbing and downgrade resistance force; Pv = Vehicle driving power; J = Total inertia

Boyer, Edmond

323

ENERGY-BASED LIMIT CYCLE COMPENSATION FOR DYNAMICALLY BALANCING WHEELED INVERTED PENDULUM MACHINES  

E-Print Network [OSTI]

ENERGY-BASED LIMIT CYCLE COMPENSATION FOR DYNAMICALLY BALANCING WHEELED INVERTED PENDULUM MACHINES are not well known. The effects of these non-linearities can be observed in the energy behavior of IP balancing. While in this paper we use an energy-based observer to detect and correct limit cycles while balancing

Dollar, Aaron M.

324

Effects of Silicon Carbide (SiC) Power Devices on HEV PWM Inverter Losses*  

E-Print Network [OSTI]

Effects of Silicon Carbide (SiC) Power Devices on HEV PWM Inverter Losses* Burak Ozpineci1,3 burak and Education Oak Ridge, TN 37831-0117 Abstract-The emergence of silicon carbide- (SiC-) based power, silicon carbide (SiC) with its superior properties compared with Si, is a good candidate to be used

Tolbert, Leon M.

325

Low Order Decentralized Stabilizing Controller Design for a Mobile Inverted Pendulum Robot  

E-Print Network [OSTI]

model is based on a form of an inverted pendulum and the robot was constructed into a mechanical system a schematic using Newton's laws of motion (e.g., [3]). The system has six states describing its motion-axis characterized by the yaw angle and yaw velocity . Any motion about the x-axis is considered negligible

Gundes, A. N.

326

Inverted Index Support for Numeric Search Marcus Fontoura Ronny Lempel Runping Qi  

E-Print Network [OSTI]

. Product and shopping search applications such as Froogle1 and Yahoo! Shopping2 allow users, while enteringInverted Index Support for Numeric Search Marcus Fontoura Ronny Lempel Runping Qi Jason Zien IBM@yahoo-inc.com jasonz@alumni.cse.ucsc.edu September 12, 2005 Abstract Today's search engines are increasingly required

Fontoura, Marcus F.

327

FRICTION AND THE INVERTED PENDULUM STABILIZATION PROBLEM Sue Ann Campbell Stephanie Crawford Kirsten Morris  

E-Print Network [OSTI]

FRICTION AND THE INVERTED PENDULUM STABILIZATION PROBLEM Sue Ann Campbell Stephanie Crawford of friction on the design and performance of feedback controllers that aim to stabilize the pendulum in the upright position. We show that a controller designed using a simple viscous friction model has poor

Morris, Kirsten

328

Design of Resonant Inverters for Optimal Efficiency over Lamp Life in Electronic Ballast  

E-Print Network [OSTI]

from a typical increase in an HID lamp equivalent resistance RI,, ovet its lifetime of more than 100 controlled resonant inverters to drive HID lamps. Considering the variation of the lamp resistance over its the lamp resistance during its Iifetime and system frequency range limitations. Design constraints have

329

Small-Signal Modeling of a Three-Phase Isolated Inverter with Both Voltage and  

E-Print Network [OSTI]

with the introduction of modern power generating units such as wind and solar power plants. As these new energy sourcesSmall-Signal Modeling of a Three-Phase Isolated Inverter with Both Voltage and Frequency Droop Rolla, Missouri 65409 Abstract-- In conventional power system operation, droop control methods are used

Kimball, Jonathan W.

330

Thermal Effects on Inverted Pendulum Thrust Stands for Steady-state High-power Plasma Thrusters  

E-Print Network [OSTI]

Thermal Effects on Inverted Pendulum Thrust Stands for Steady-state High-power Plasma Thrusters A and Aerospace Engineering Department Princeton University, Princeton, New Jersey 08544 AIAA-2003-4842§ July 22, 2003 Abstract Thermal effects on direct measurements of the thrust produced by steady-state, high-power

Choueiri, Edgar

331

Averaged Model of Inverter-Fed Ultrasonic Motors J. Maas, H. Grotstollen  

E-Print Network [OSTI]

Averaged Model of Inverter-Fed Ultrasonic Motors J. Maas, H. Grotstollen Institute for Power - An averagedmodel for the most advanced traveling wave type ultrasonicmotor drive is presented using a generalized-modulationconcepts for the feeding resonant converter. Since the describing function method is applied for the nonlinear blocks

Paderborn, Universitt

332

A major radio outburst in III Zw 2 with an extremely inverted, millimeterpeaked spectrum  

E-Print Network [OSTI]

A major radio outburst in III Zw 2 with an extremely inverted, millimeter­peaked spectrum Heino ABSTRACT III Zw 2 is a spiral galaxy with an optical spectrum and faint extended radio structure typical­band radio spectrum between 1.4 and 666 GHz shows a textbook­like synchrotron spectrum peaking at 43 GHz

Falcke, Heino

333

Inverted-UShaped Dopamine Actions on Human Working Memory and Cognitive Control  

E-Print Network [OSTI]

Cools and Mark D'Esposito Brain dopamine (DA) has long been implicated in cognitive control processesREVIEW Inverted-U­Shaped Dopamine Actions on Human Working Memory and Cognitive Control Roshan, cognitive control is a multifactorial phenomenon, requiring a dynamic balance between cognitive stability

334

Math Minute 2.1 What Can You Learn from a Dot Plot? 1. Suppose that two sequences are identical except that a segment is inverted in one  

E-Print Network [OSTI]

except that a segment is inverted in one sequence, relative to the other. Explain how such an inversion

Campbell, A. Malcolm

335

Reduced-size Microstrip Four-Pole Bandpass Filter Using Two-layer Structure with Quarter-Wavelength Resonators and Open Stub Inverters  

E-Print Network [OSTI]

-Wavelength Resonators and Open Stub Inverters Azzeddine Djaiz and Tayeb A. Denidni and Halim Boutayeb INRS-layer structure with quarter-wavelength resonators and open stub inverters is proposed. The coupling between the layers. The open stub inverters are used in order to increase the selectivity of the filter and to avoid

Boyer, Edmond

336

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 47, NO. 1, JANUARY/FEBRUARY 2011 223 EMI Study of Three-Phase Inverter-Fed Motor Drives  

E-Print Network [OSTI]

of Three-Phase Inverter-Fed Motor Drives Bertrand Revol, James Roudet, Jean-Luc Schanen, Senior Member setup and can be used during the design of a variable-speed inverter motor association. The objective in an inverter­motor association in order to depict the influence of elements, such as the elec- tromagnetic

Paris-Sud XI, Université de

337

The Fabrication of an Inverter using Rubrene Single Crystal Organic Transistors C. Corbet, Y. Matsuoka, K. Watanabe, P.I. Yoshihiro Iwasa  

E-Print Network [OSTI]

The Fabrication of an Inverter using Rubrene Single Crystal Organic Transistors C. Corbet, Y single crystal devices. The purpose of this project is to fabricate an inverter device using organic by a physical vapor transport method with a nitrogen flow. Inverter devices were fabricated by laminating thus

Mellor-Crummey, John

338

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 19, NO. 2, MARCH 2004 363 A Passive Soft-Switching Snubber for PWM Inverters  

E-Print Network [OSTI]

-Switching Snubber for PWM Inverters Fang Z. Peng, Senior Member, IEEE, Gui-Jia Su, Senior Member, IEEE, and Leon M for pulse-width modulation (PWM) inverters to achieve soft-switching purposes without significant cost for each switching device in an inverter to provide low dv/dt and low switching losses to the device

Tolbert, Leon M.

339

IEEE IAS 1998 Annual Meeting, St. Louis, Missouri, October 10-15, 1998, pp. 1424-1431. Novel Multilevel Inverter Carrier-Based PWM Methods  

E-Print Network [OSTI]

Multilevel Inverter Carrier-Based PWM Methods Leon M. Tolbert Thomas G. Habetler Oak Ridge National inverter topology has brought forth various pulse width 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

Tolbert, Leon M.

340

SiC Vertical JFET Pure Diode-Less Inverter Leg Rmy Ouaida1,2, Xavier Fonteneau1, Fabien Dubois1, Dominique Bergogne1, Florent Morel1  

E-Print Network [OSTI]

SiC Vertical JFET Pure Diode-Less Inverter Leg Rémy Ouaida1,2, Xavier Fonteneau1, Fabien Dubois1 in an inverter leg without any internal or external diode. The JFET is characterized to show the reverse conduction capability while the gate-to-source voltage is lower than the threshold voltage. An inverter leg

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Predicting Static Losses in an Inverter-Leg built with SiC Normally-Off JFETs and SiC diodes  

E-Print Network [OSTI]

Predicting Static Losses in an Inverter-Leg built with SiC Normally-Off JFETs and SiC diodes Xavier details the methodology of a method to calculate static losses in an inverter leg built with SiC Normally model with a constant current. The proposed method is applied to a three phase inverter to evaluate

Paris-Sud XI, Université de

342

Conditions for Capacitor Voltage Regulation in a Five-Level Cascade Multilevel Inverter: Application to Voltage-Boost in a PM Drive  

E-Print Network [OSTI]

Conditions for Capacitor Voltage Regulation in a Five-Level Cascade Multilevel Inverter Abstract-- A cascade multilevel inverter is a power electronic device built to synthesize a desired AC voltage from several levels of DC voltages. Such inverters have been the subject of research in the last

Tolbert, Leon M.

343

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 35, NO. 5, SEPTEMBER/OCTOBER 19991098 Novel Multilevel Inverter Carrier-Based PWM Method  

E-Print Network [OSTI]

Multilevel Inverter Carrier-Based PWM Method Leon M. Tolbert, Senior Member, IEEE, and Thomas G. Habetler, Senior Member, IEEE Abstract The advent of the transformerless multilevel inverter topology has brought devices in each of the multiple voltage levels in the inverter. An analysis of how existing multilevel

Tolbert, Leon M.

344

Modular Inverter for Advanced Control Applications In the fall of 2003, a team of graduate students was assembled to design and construct a  

E-Print Network [OSTI]

a set of well-documented inverters of various ratings capable of quickly implementing a new control-powernts2\\ece power design archives\\documents\\specification documents\\sd00004-001 modular inverter systemModular Inverter for Advanced Control Applications May 2006 In the fall of 2003, a team of graduate

Kimball, Jonathan W.

345

A A L B O R G U N I V E R S I T Y State of the Art Analysis for the `SolcelleInverter' project  

E-Print Network [OSTI]

electronic inverter that converts light into electrical alternating (AC) power when it is connected-of-the-Art (SOTA / SOA), Grid-tied Inverter, Single-Phase, Standards, Maximum Power Point Tracking, Islanding Analysis of Possible Solutions for Inverter W.4 Development And Simulation of New Topologies W.5 Selection

346

A A L B O R G U N I V E R S I T Y Simulation of Inverters for the PHOTONERGYTM project  

E-Print Network [OSTI]

-Module is an electrical product and is the combination of a single module and a single power electronic inverter Title: Simulation of Inverters for the PHOTONERGYTM Project Subtitle: Development And Simulation of New of New Topologies W.5 Selection of Topology W.6 Design and Prototyping of Inverter W.7 Test

347

Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control  

SciTech Connect (OSTI)

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

348

Hardware Development of a Laboratory-Scale Microgrid Phase 1--Single Inverter in Island Mode Operation: Base Year Report, December 2000 -- November 2001  

SciTech Connect (OSTI)

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

349

A Five-Level Cascade Multilevel Inverter Three-Phase Motor Drive Using a Single DC Source  

SciTech Connect (OSTI)

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

350

Adaptive Selective Harmonic Minimization Based on ANNs for Cascade Multilevel Inverters With Varying DC Sources  

SciTech Connect (OSTI)

A new approach for modulation of an 11-level cascade multilevel inverter using selective harmonic elimination is presented in this paper. The dc sources feeding the multilevel inverter are considered to be varying in time, and the switching angles are adapted to the dc source variation. This method uses genetic algorithms to obtain switching angles offline for different dc source values. Then, artificial neural networks are used to determine the switching angles that correspond to the real-time values of the dc sources for each phase. This implies that each one of the dc sources of this topology can have different values at any time, but the output fundamental voltage will stay constant and the harmonic content will still meet the specifications. The modulating switching angles are updated at each cycle of the output fundamental voltage. This paper gives details on the method in addition to simulation and experimental results.

Filho, Faete [ORNL; Maia, Helder Z [UFMS, Department of Electrical Engineering; Mateus, Tiago Henrique D [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL; Pinto, Joao Onofre P [ORNL

2013-01-01T23:59:59.000Z

351

Dynamic Model Validation of PV Inverters Under Short-Circuit Conditions: Preprint  

SciTech Connect (OSTI)

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

352

Advanced Liquid Cooling for a Traction Drive Inverter Using Jet Impingement and Microfinned Enhanced Surfaces: Preprint  

SciTech Connect (OSTI)

Jet impingement on plain and micro-finned enhanced surfaces was compared to a traditional channel flow configuration. The jets provide localized cooling to areas heated by the insulated-gate bipolar transistor and diode devices. Enhanced microfinned surfaces increase surface area and thermal performance. Using lighter materials and designing the fluid path to manage pressure losses increases overall performance while reducing weight, volume, and cost. Powering four diodes in the center power module of the inverter and computational fluid dynamics (CFD) modeling was used to characterize the baseline as well as jet-impingement-based heat exchangers. CFD modeling showed the thermal performance improvements should hold for a fully powered inverter. Increased thermal performance was observed for the jet-impingement configurations when tested at full inverter power (40 to 100 kW output power) on a dynamometer. The reliability of the jets and enhanced surfaces over time was also investigated. Experimentally, the junction-to- coolant thermal resistance was reduced by up to 12.5% for jet impingement on enhanced surfaces s compared to the baseline channel flow configuration. Base plate-to-coolant (convective) resistance was reduced by up to 37.0% for the jet-based configuration compared to the baseline, suggesting that while improvements to the cooling side reduce overall resistance, reducing the passive stack resistance may contribute to lowering overall junction-to-coolant resistance. Full inverter power testing showed reduced thermal resistance from the middle of the module baseplate to coolant of up to 16.5%. Between the improvement in thermal performance and pumping power, the coefficient of performance improved by up to 13% for the jet-based configuration.

Waye, S. K.; Narumanchi, S.; Mihalic, M.; Moreno, G.; Bennion, K.; Jeffers, J.

2014-08-01T23:59:59.000Z

353

New Environmentally Friendly Dispersants for High Temperature Invert-Emulsion Drilling Fluids Weighted by Manganese Tetraoxide  

E-Print Network [OSTI]

filtration. 3. Specific fluid weight is required to hydrostatically balance formation pressures and to control the well column. The desired fluid density is attained by addition of weighting agents like barite and calcium carbonate. OBMs are water...) minimized drilling problems related to water-sensitive shales. Also, Bennett (1984) mentioned that mineral-oil based invert-emulsion fluids have greater tolerance to the contaminants such as carbonates, hydrogen sulfide, anhydrite, salt, or cement...

Rehman, Abdul

2012-02-14T23:59:59.000Z

354

A lightweight inverter for off-grid and grid-connected systems  

SciTech Connect (OSTI)

This paper presents a novel bi-directional power processing topology particularly suitable as an inverter for both grid and off-grid alternative energy systems. All semiconductor devices are soft-switched, thereby allowing higher switching frequencies, improving efficiency, and reducing electromagnetic interference (EMI). The topology may utilize a small, light-weight, and inexpensive high-frequency transformer. Experimental results of a 1 kW bi-directional dc-dc converter are presented.

Barone, F. [Univ. of New South Wales, Sydney, New South Wales (Australia). Centre for Photovoltaic Devices and Systems

1994-12-31T23:59:59.000Z

355

Analytical Techniques and Operational Perspectives for a Spherical Inverted-F Antenna  

E-Print Network [OSTI]

ground. The SIFA resembles a planar inverted-F antenna (PIFA) that has been conformally recessed onto a sphere. The basic design, simulation, and fabrication of a SIFA were recently reported. The aim of this thesis is to provide a three... are pushing the limit for antenna engineers, increasing the popularity of multifunctional designs that combine several functions into one structure [e.g., 8]. Planar antennas are an important class of antennas, which, due to their thin, flat geometries...

Rolando, David Lee

2012-02-14T23:59:59.000Z

356

Transition from mode-locked periodic orbit to chaos in a 2D piecewise smooth non-invertible map  

E-Print Network [OSTI]

In this work we report a new route to chaos from a resonance torus in a piecewise smooth non-invertible map of the plane into itself. The closed invariant curve defining the resonance torus is formed by the union of unstable manifolds of saddle cycle and the points of stable cycle and saddle cycle. We have found that a cusp torus cannot develop before the onset of chaos, though the loop torus appears. The destruction of the two-dimensional torus occurs through homoclinic bifurcation in the presence of an infinite number of loops on the invariant curve. We show that owing to the non-invertible nature of the map, the structure of the basin of attraction changes from simply connected to a nonconnected one. We also describe how the mechanism of transition to chaos differs from the scenario of appearance of chaos in invertible maps as well as in smooth non-invertible maps.

Soma De; Soumitro Banerjee; Akhil Ranjan Roy

2008-12-19T23:59:59.000Z

357

Advanced Photovoltaic Inverter Functionality using 500 kW Power Hardware-in-Loop Complete System Laboratory Testing: Preprint  

SciTech Connect (OSTI)

With the increasing penetration of distribution connected photovoltaic (PV) systems, more and more PV developers and utilities are interested in easing future PV interconnection concerns by mitigating some of the impacts of PV integration using advanced PV inverter controls and functions. This paper describes the testing of a 500 kW PV inverter using Power Hardware-in-Loop (PHIL) testing techniques. The test setup is described and the results from testing the inverter in advanced functionality modes, not commonly used in currently interconnected PV systems, are presented. PV inverter operation under PHIL evaluation that emulated both the DC PV array connection and the AC distribution level grid connection are shown for constant power factor (PF) and constant reactive power (VAr) control modes. The evaluation of these modes was completed under varying degrees of modeled PV variability.

Mather, B. A.; Kromer, M. A.; Casey, L.

2013-01-01T23:59:59.000Z

358

Diamond logic inverter with enhancement-mode metal-insulator-semiconductor field effect transistor  

SciTech Connect (OSTI)

A diamond logic inverter is demonstrated using an enhancement-mode hydrogenated-diamond metal-insulator-semiconductor field effect transistor (MISFET) coupled with a load resistor. The gate insulator has a bilayer structure of a sputtering-deposited LaAlO{sub 3} layer and a thin atomic-layer-deposited Al{sub 2}O{sub 3} buffer layer. The source-drain current maximum, extrinsic transconductance, and threshold voltage of the MISFET are measured to be ?40.7?mAmm{sup ?1}, 13.2??0.1?mSmm{sup ?1}, and ?3.1??0.1?V, respectively. The logic inverters show distinct inversion (NOT-gate) characteristics for input voltages ranging from 4.0 to ?10.0?V. With increasing the load resistance, the gain of the logic inverter increases from 5.6 to as large as 19.4. The pulse response against the high and low input voltages shows the inversion response with the low and high output voltages.

Liu, J. W., E-mail: liu.jiangwei@nims.go.jp [International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Liao, M. Y.; Imura, M. [Optical and Electronic Materials Unit, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Watanabe, E.; Oosato, H. [Nanofabrication Platform, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Koide, Y., E-mail: koide.yasuo@nims.go.jp [Optical and Electronic Materials Unit, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Nanofabrication Platform, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Center of Materials Research for Low Carbon Emission, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

2014-08-25T23:59:59.000Z

359

Efficiency of static core turn-off in a system-on-a-chip with variation  

DOE Patents [OSTI]

A processor-implemented method for improving efficiency of a static core turn-off in a multi-core processor with variation, the method comprising: conducting via a simulation a turn-off analysis of the multi-core processor at the multi-core processor's design stage, wherein the turn-off analysis of the multi-core processor at the multi-core processor's design stage includes a first output corresponding to a first multi-core processor core to turn off; conducting a turn-off analysis of the multi-core processor at the multi-core processor's testing stage, wherein the turn-off analysis of the multi-core processor at the multi-core processor's testing stage includes a second output corresponding to a second multi-core processor core to turn off; comparing the first output and the second output to determine if the first output is referring to the same core to turn off as the second output; outputting a third output corresponding to the first multi-core processor core if the first output and the second output are both referring to the same core to turn off.

Cher, Chen-Yong; Coteus, Paul W; Gara, Alan; Kursun, Eren; Paulsen, David P; Schuelke, Brian A; Sheets, II, John E; Tian, Shurong

2013-10-29T23:59:59.000Z

360

Growth of Nanoscale Nickel Ferrite on Carbonaceous Matrix- A Novel Method of Turning Harmful Particulates into a Functional Nanocomposite: An XAFS Study  

SciTech Connect (OSTI)

Particulate matter (PM) emission from residual oil combustion typically consists of carbonaceous material accompanied by inorganic matter notably transition metal sulfates. Often a minor sulfide form is found in the coarse fraction while an oxide form is more common in the fine and ultrafine fractions. A composite comprising of nanoscale nickel ferrite dispersed on carbonaceous matrix has been obtained following liberation of metal sulfates from the fine PM - a novel method of turning harmful particulates into a functional nanocomposite without the need for elaborate preparation using expensive precursors. The nickel ferrite content in the composite varies with the Fe/Ni ratio in particulate, fuel type, and combustion condition. Such variation may lead to the composite exhibiting diverse physical behaviors. Detailed structure and cation distribution in dispersed ferrite have been studied using Fe and Ni K-edges XAFS spectroscopy. Peaks are identified in the radial structure function with specific atom pair correlations within the spinel ferrite from which the relative occupancy of the cations in the octahedral and tetrahedral sites can be discerned. The results show that Ni(II) has strong preference for the octahedral site, while Fe(III) prefers both sites which is consistent with that of an inverted spinel ferrite.

Pattanaik, S.; Huggins, F; Huffman, G

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

Haptic Models of an Automotive Turn-Signal Switch: Identification and Playback Results  

E-Print Network [OSTI]

Haptic Models of an Automotive Turn-Signal Switch: Identification and Playback Results Mark B of virtual environments. This paper addresses the problem of modeling the feel of an automotive turn- signal would require accurate models of the primary automotive controls, including the steering wheel, gear

Hollerbach, John M.

362

Study on the relationship between left-turn traffic operations and safety at signalized intersections  

E-Print Network [OSTI]

............................................................ 6? FIGURE 3 Regression Lines and Averaged Data for Model B2 ..................................... 21? FIGURE 4 Regression Lines for Model B4 ..................................................................... 21? FIGURE 5 Left-turn Accident... Distribution ..................................................................... 30? FIGURE 6 Box Plot of the Number of Accidents for Left-Turn Type ............................ 35? FIGURE 7 Box Plot of Number of Crashes for Each Phasing Sequence...

Lee, Sunghoon

2009-06-02T23:59:59.000Z

363

Gender and Maternal Responsivity as Factors in Number of Conversational Turns in Adolescents with Developmental Disabilities  

E-Print Network [OSTI]

1 Gender and Maternal Responsivity as Factors in Number of Conversational Turns in Adolescents, Parlors, 3:00-4:00 PM This study examines factors that influence interactions between adolescents would take more conversational turns than boys, and that higher maternal responsivity would

364

"MINE YOUR OWN BUSINESS": USING PROCESS MINING TO TURN BIG DATA INTO REAL VALUE  

E-Print Network [OSTI]

"MINE YOUR OWN BUSINESS": USING PROCESS MINING TO TURN BIG DATA INTO REAL VALUE Van der Aalst, Wil is to turn event data into valuable insights. Only process mining techniques directly relate event data-oriented analysis techniques (e.g., data mining and machines learning) typically focus on simple classification

van der Aalst, Wil

365

Test Report on ISR Double-Loop, Spray-Cooled Inverter  

SciTech Connect (OSTI)

The Isothermal Systems Research, Inc. (ISR) double-loop, two-phase spray cooling system was designed to use 85 C transmission oil to cool a heat exchanger via a second cooling loop. The heat exchanger condenses the working fluid vapor back to liquid inside a sealed enclosure to allow for continuous spray cooling of electronics. In the ORNL tests, 85 C water/ethylene/glycol (WEG), which has better thermal properties than transmission oil, was substituted for the transmission oil. Because the ISR spray-cooling system requires a second cooling loop, the final inverter might be inherently larger than inverters that do not require a second-loop cooling system. The ISR test setup did not include a dc bus capacitor. Because the insulated gate bipolar transistor (IGBT) conduction test indicated that the ISR test setup could not be properly loaded thermally, no switching tests were conducted. Therefore it was not necessary to attach external capacitors outside the test setup. During load situations not exceeding 400A, the WEG inlet temperature was higher than the WEG outlet temperature. This meant that the 85 C WEG heat exchanger was not cooling the inverter and became a thermal load to the inverter. Only when the load was higher than 400A with a higher coolant temperature and the release valve actuated did the WEG heat exchanger start to cool the 2-phase coolant. The inverter relied strongly on the cooling of the huge aluminum enclosure located inside the ventilation chamber. In a hybrid vehicle, the inverter is situated under the hood, where the dependency on cooling provided by the enclosure may become a problem. The IGBT power dissipation with both sides being spray cooled was around 34 W/cm{sup 2} at 403A, with 995W total IGBT loss at 113.5 C projected junction temperature before the release valve was actuated. The current loading could rise higher than 403 A before reaching the 125 C junction temperature limit if the pressure buildup inside the enclosure could be prevented by improving the secondary cooling loop. This 34 w/cm{sup 2} was an average across all dies. There is no doubt that the cooling capability of the ISR spray-cooling test setup can be improved by (1) lowering the WEG inlet temperature from 85 C to say 70 C, this would condense the vapor better and lower the container pressure, (2) modification of the vapor condenser inside the container to cool both the vapor and the liquid of the 2-phase coolant, in the present setup only the vapor is cooled by the condenser inside the container, and (3) lower the liquid temperature through (1) and (2) to avoid the vaporization that causes cavitations in the pump for ensuring the pump's life expectance.

Hsu, John S [ORNL; Coomer, Chester [ORNL; Campbell, Steven L [ORNL; Wiles, Randy H [ORNL; Lowe, Kirk T [ORNL; McFee, Marshall T [ORNL

2007-02-01T23:59:59.000Z

366

A A L B O R G U N I V E R S I T Y Specifications for the `SolcelleInverter' project  

E-Print Network [OSTI]

-Module is an electrical product and is the combination of a single module and a single power electronic inverter Solutions for Inverter W.4 Development And Simulation of New Topologies W.5 Selection of Topology W.6 DesignA A L B O R G U N I V E R S I T Y Specifications for the `SolcelleInverter' project An AC

367

Traction Drive Inverter Cooling with Submerged Liquid Jet Impingement on Microfinned Enhanced Surfaces (Presentation)  

SciTech Connect (OSTI)

Jet impingement is one means to improve thermal management for power electronics in electric-drive traction vehicles. Jet impingement on microfin-enhanced surfaces further augments heat transfer and thermal performance. A channel flow heat exchanger from a commercial inverter was characterized as a baseline system for comparison with two new prototype designs using liquid jet impingement on plain and microfinned enhanced surfaces. The submerged jets can target areas with the highest heat flux to provide local cooling, such as areas under insulated-gate bipolar transistors and diode devices. Low power experiments, where four diodes were powered, dissipated 105 W of heat and were used to validate computational fluid dynamics modeling of the baseline and prototype designs. Experiments and modeling used typical automotive flow rates using water-ethylene glycol as a coolant (50%-50% by volume). The computational fluid dynamics model was used to predict full inverter power heat dissipation. The channel flow and jet impingement configurations were tested at full inverter power of 40 to 100 kW (output power) on a dynamometer, translating to an approximate heat dissipation of 1 to 2 kW. With jet impingement, the cold plate material is not critical for the thermal pathway. A high-temperature plastic was used that could eventually be injection molded or formed, with the jets formed from a basic aluminum plate with orifices acting as nozzles. Long-term reliability of the jet nozzles and impingement on enhanced surfaces was examined. For jet impingement on microfinned surfaces, thermal performance increased 17%. Along with a weight reduction of approximately 3 kg, the specific power (kW/kg) increased by 36%, with an increase in power density (kW/L) of 12% compared with the baseline channel flow configuration.

Waye, S.; Narumanchi, S.; Moreno, G.

2014-09-01T23:59:59.000Z

368

Highly efficient inverted organic solar cells using amino acid modified indium tin oxide as cathode  

SciTech Connect (OSTI)

In this paper, we report that highly efficient inverted organic solar cells were achieved by modifying the surface of indium tin oxide (ITO) using an amino acid, Serine (Ser). With the modification of the ITO surface, device efficiency was significantly enhanced from 0.63% to 4.17%, accompanied with an open circuit voltage (Voc) that was enhanced from 0.30?V to 0.55?V. Ultraviolet and X-ray photoelectron spectroscopy studies indicate that the work function reduction induced by the amino acid modification resulting in the decreased barrier height at the ITO/organic interface played a crucial role in the enhanced performances.

Li, Aiyuan; Nie, Riming; Deng, Xianyu, E-mail: xydeng@hitsz.edu.cn [Research Center for Advanced Functional Materials and Devices, Shenzhen Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China); Wei, Huaixin; Li, Yanqing; Tang, Jianxin [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123 (China); Zheng, Shizhao; Wong, King-Young [Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong (China)

2014-03-24T23:59:59.000Z

369

Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system  

SciTech Connect (OSTI)

This paper investigates the dynamic performance of the advanced static var compensator or STATCON at a high voltage direct current (HVDC) converter terminal where the ac system has a very low short circuit ratio (SCR). The STATCON is based on a nine-level GTO thyristor inverter. The studies include operating characteristics of the STATCON under various ac and dc disturbances. The simulation results are compared with other types of reactive power compensation options available for such applications. It is shown that the STATCON has clear advantages over the other compensators, in areas such as; fault response time, voltage support ability, and dc recovery, while operating with very weak ac systems.

Zhuang, Y.; Menzies, R.W. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada)] [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

370

Measured performances of curved inverted-vee, absorber compound parabolic concentrating solar-energy collectors  

SciTech Connect (OSTI)

The design and thermal performance of modified compound parabolic concentrating (CPC) solar-energy collectors are described. The designs incorporate a curved inverted-Vee absorber fin, which allows a reflector of simple geometry to be used. This CPC collector, has exhibited a superior performance to that of a conventional cusp-reflector CPC design, owing to the enhancement of the optical efficiency obtained by eliminating gap optical losses and an enhanced heat removal factor. The consequence upon the performance of a further design refinement, which inhibited the convective heat losses, is also reported.

Norton, B. (Univ. of Ulster at Jordanstown (Ireland)); Prapas, D.E. (Aristotle Univ. of Thessaloniki (Greece)); Eames, P.C.; Probert, S.D. (Cranfield Institute of Technology, Bedford (England))

1989-01-01T23:59:59.000Z

371

Vehicle Technologies Office Merit Review 2014: Inverter R&D | Department of  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf The 2012Nuclear Guide Remote55Energy Inverter R&D Vehicle

372

A Novel Inductor-less DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle Applications  

SciTech Connect (OSTI)

This paper presents an inductorless cascaded H- bridge multilevel boost inverter for EV and HEV applications. Currently available power inverter systems for HEVs use a DC- DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV traction drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. An inductorless cascaded H-bridge multilevel boost inverter for EV and HEV applications is proposed in this paper. Traditionally, each H-bridge needs a DC power supply. The proposed inductorless cascaded H-bridge multilevel boost inverter uses a standard 3-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. Fundamental switching scheme is used to do modulation control and to produce a 5-level phase voltage. Experiments show that the proposed inductorless DC-AC cascaded H-bridge multilevel boost inverter can output a boosted AC voltage.

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

2007-01-01T23:59:59.000Z

373

An operational analysis of protected-permitted lead-lag left-turn phasing  

E-Print Network [OSTI]

Chair of Advisory Committee: Dr. Daniel B. Fambro This thesis documents an operational analysis of a special type of protected- permitted lead-lag left-turn phasing sequence developed and used by traffic engineers in Dallas, Texas. This phasing, known... as the Dallas phasing, does not follow existing standards for left-turn phasing set forth in the Manual for Uniform Trajfic Control Devices (MUTCD). The objective of this research was to determine whether existing left-turn models can be used to analyze...

Gaston, Gilmer D

2012-06-07T23:59:59.000Z

374

Advanced Inverter Technology for High Penetration Levels of PV Generation in Distribution Systems  

SciTech Connect (OSTI)

This subcontract report was completed under the auspices of the NREL/SCE High-Penetration Photovoltaic (PV) Integration Project, which is co-funded by the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) and the California Solar Initiative (CSI) Research, Development, Demonstration, and Deployment (RD&D) program funded by the California Public Utility Commission (CPUC) and managed by Itron. This project is focused on modeling, quantifying, and mitigating the impacts of large utility-scale PV systems (generally 1-5 MW in size) that are interconnected to the distribution system. This report discusses the concerns utilities have when interconnecting large PV systems that interconnect using PV inverters (a specific application of frequency converters). Additionally, a number of capabilities of PV inverters are described that could be implemented to mitigate the distribution system-level impacts of high-penetration PV integration. Finally, the main issues that need to be addressed to ease the interconnection of large PV systems to the distribution system are presented.

Schauder, C.

2014-03-01T23:59:59.000Z

375

Control of Two Permanent Magnet Machines Using a Five-Leg Inverter for Automotive Applications  

SciTech Connect (OSTI)

This paper presents digital control schemes for control of two permanent magnet (PM) machines in an integrated traction and air-conditioning compressor drive system for automotive applications. The integrated drive system employs a five-leg inverter to power a three-phase traction PM motor and a two-phase compressor PM motor by tying the common terminal of the two-phase motor to the neutral point of the three-phase motor. Compared to a three-phase or a standalone two-phase inverter, it eliminates one phase leg and shares the control electronics between the two drives, thus significantly reducing the component count of the compressor drive. To demonstrate that the speed and torque of the two PM motors can be controlled independently, a control strategy was implemented in a digital signal processor, which includes a rotor flux field orientation based control (RFOC) for the three-phase motor, a similar RFOC and a position sensorless control in the brushless dc (BLDC) mode for the two-phase motor. Control implementation issues unique to a two-phase PM motor are also discussed. Test results with the three-phase motor running in the ac synchronous (ACS) mode while the two-phase motor either in the ACS or the BLDC mode are included to verify the independent speed and torque control capability of the integrated drive.

Su, Gui-Jia [ORNL; Tang, Lixin [ORNL; Huang, Xianghui [GE Global Research

2006-01-01T23:59:59.000Z

376

An inverted cylindrical sputter magnetron as metal vapor supply for electron cyclotron resonance ion sources  

SciTech Connect (OSTI)

An inverted cylindrical sputter magnetron device has been developed. The magnetron is acting as a metal vapor supply for an electron cyclotron resonance (ECR) ion source. FEM simulation of magnetic flux density was used to ensure that there is no critical interaction between both magnetic fields of magnetron and ECR ion source. Spatially resolved double Langmuir probe and optical emission spectroscopy measurements show an increase in electron density by one order of magnitude from 1 10{sup 10} cm{sup ?3} to 1 10{sup 11} cm{sup ?3}, when the magnetron plasma is exposed to the magnetic mirror field of the ECR ion source. Electron density enhancement is also indicated by magnetron plasma emission photography with a CCD camera. Furthermore, photographs visualize the formation of a localized loss-cone-area, when the magnetron is operated at magnetic mirror field conditions. The inverted cylindrical magnetron supplies a metal atom load rate of R > 1 10{sup 18} atoms/s for aluminum, which meets the demand for the production of a milliampere Al{sup +} ion beam.

Weichsel, T., E-mail: tim.weichsel@fep.fraunhofer.de; Hartung, U.; Kopte, T. [Fraunhofer Institute for Electron Beam and Plasma Technology, 01277 Dresden (Germany)] [Fraunhofer Institute for Electron Beam and Plasma Technology, 01277 Dresden (Germany); Zschornack, G. [Institute of Solid State Physics, Dresden University of Technology, 01062 Dresden, Germany and Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, Dresden (Germany)] [Institute of Solid State Physics, Dresden University of Technology, 01062 Dresden, Germany and Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, Dresden (Germany); Kreller, M.; Silze, A. [DREEBIT GmbH, 01900 Grossroehrsdorf (Germany)] [DREEBIT GmbH, 01900 Grossroehrsdorf (Germany)

2014-05-15T23:59:59.000Z

377

Neutrinoless Double Beta Decay, the Inverted Hierarchy and Precision Determination of theta(12)  

E-Print Network [OSTI]

Ruling out the inverted neutrino hierarchy with neutrinoless double beta decay experiments is possible if a limit on the effective mass below the minimal theoretically possible value is reached. We stress that this lower limit depends strongly on the value of the solar neutrino mixing angle: it introduces an uncertainty of a factor of 2 within its current 3 sigma range. If an experiment is not background-free, a factor of two in effective mass corresponds to a combined factor of 16 improvement for the experimental parameters running time, detector mass, background level and energy resolution. Therefore, a more precise determination of theta(12) is crucial for the interpretation of experimental results and the evaluation of the potential and requirements for future experiments. We give the required half-lifes to exclude (and touch) the inverted hierarchy regime for all double beta decay isotopes with a Q-value above 2 MeV. The nuclear matrix elements from 6 different groups and, if available, their errors are used and compared. We carefully put the calculations on equal footing in what regards various convention issues. We also use our compilation of matrix elements to give the reachable values of the effective mass for a given half-life value.

Alexander Dueck; Werner Rodejohann; Kai Zuber

2011-04-17T23:59:59.000Z

378

Design and Quasi-Equilibrium Analysis of a Distributed Frequency-Restoration Controller for Inverter-Based Microgrids  

SciTech Connect (OSTI)

This paper discusses a proposed frequency restoration controller which operates as an outer loop to frequency droop for voltage-source inverters. By quasi-equilibrium analysis, we show that the proposed controller is able to provide arbitrarily small steady-state frequency error while maintaing power sharing between inverters without need for communication or centralized control. We derive rate of convergence, discuss design considerations (including a fundamental trade-off that must be made in design), present a design procedure to meet a maximum frequency error requirement, and show simulation results verifying our analysis and design method. The proposed controller will allow flexible plug-and-play inverter-based networks to meet a specified maximum frequency error requirement.

Ainsworth, Nathan G [ORNL] [ORNL; Grijalva, Prof. Santiago [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta

2013-01-01T23:59:59.000Z

379

Accelerating development of advanced inverters : evaluation of anti-islanding schemes with grid support functions and preliminary laboratory demonstration.  

SciTech Connect (OSTI)

The high penetration of utility interconnected photovoltaic (PV) systems is causing heightened concern over the effect that variable renewable generation will have on the electrical power system (EPS). These concerns have initiated the need to amend the utility interconnection standard to allow advanced inverter control functionalities that provide: (1) reactive power control for voltage support, (2) real power control for frequency support and (3) better tolerance of grid disturbances. These capabilities are aimed at minimizing the negative impact distributed PV systems may have on EPS voltage and frequency. Unfortunately, these advanced control functions may interfere with island detection schemes, and further development of advanced inverter functions requires a study of the effect of advanced functions on the efficacy of antiislanding schemes employed in industry. This report summarizes the analytical, simulation and experimental work to study interactions between advanced inverter functions and anti-islanding schemes being employed in distributed PV systems.

Neely, Jason C.; Gonzalez, Sigifredo; Ropp, Michael [Northern Plains Power Technologies, Brookings, SD] [Northern Plains Power Technologies, Brookings, SD; Schutz, Dustin [Northern Plains Power Technologies, Brookings, SD] [Northern Plains Power Technologies, Brookings, SD

2013-11-01T23:59:59.000Z

380

Metal-based turn-on fluorescent probes for nitric oxide sensing  

E-Print Network [OSTI]

Chapter 1. Metal-Based Turn-On Fluorescent Probes for Sensing Nitric Oxide. Nitric oxide, a reactive free radical, regulates a variety of biological processes. The absence of tools to detect NO directly, rapidly, specifically ...

Lim, Mi Hee

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

E-Print Network 3.0 - act turns fifty Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

<< < 1 2 3 4 5 > >> 1 Debo's classic work tells the tragic story of the Summary: , Cherokee, Creek, and Seminole na- tions at the turn of the last century in what is now the...

382

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 49, NO. 5, MAY 2002 621 Modeling of PWM Inverter-Supplied AC Drives  

E-Print Network [OSTI]

. The fundamental frequency of this waveform is adjusted to produce the desired speed. In modern electric drives, MAY 2002 621 Modeling of PWM Inverter-Supplied AC Drives at Low Switching Frequencies T. A. Sakharuk in ac drives supplied by pulsewidth modulated (PWM) power electronic inverters. Specifically, the paper

Stankoviæ, Aleksandar

383

Abstract-A fault detection and reconfiguration technique for a cascaded H-bridge 11-level inverter drives during faulty condition  

E-Print Network [OSTI]

of multilevel inverters for electric drive application have been discussed in [1]. The cascaded MLID is a general fit for large automotive all-electric drives because of the high VA rating possible and because structure of a three-phase cascaded multilevel inverter drive for an electric vehicle is illustrated in Fig

Tolbert, Leon M.

384

Abstract--In this paper, the authors present the modelling of the impedance variation of an inverter DC bus. Modelling is  

E-Print Network [OSTI]

an analysis of the inverter DC bus in order to develop a new diagnostic method by the elec- tromagnetic field of an inverter DC bus. Modelling is done by application of the PEEC method (Partial Element Equivalent Circuit measurement [1]. Actually, the power of the electrical drives flows through the bus-bar, for this rea- son

Boyer, Edmond

385

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 57, NO. 10, OCTOBER 2010 3431 A Universal Grid-Connected Fuel-Cell Inverter for  

E-Print Network [OSTI]

. INTRODUCTION THE utilization of fuel cells for distributed power gen- eration requires the development of a low-cost-Connected Fuel-Cell Inverter for Residential Application Sudip K. Mazumder, Senior Member, IEEE, Rajni K. Burra--This paper describes a universal fuel-cell-based grid- connected inverter design with digital

Mazumder, Sudip K.

386

Exploring the Neutrinoless Double Beta Decay in the Inverted Neutrino Hierarchy with Bolometric Detectors  

E-Print Network [OSTI]

Neutrinoless double beta decay (0nubb) is one of the most sensitive probes for physics beyond the Standard Model, providing unique information on the nature of neutrinos. In this paper we review the status and outlook for bolometric 0nubb decay searches. We summarize recent advances in background suppression demonstrated using bolometers with simultaneous readout of heat and light signals. We simulate several configurations of a future CUORE-like bolometer array which would utilize these improvements and present the sensitivity reach of a hypothetical next-generation bolometric 0nubb experiment. We demonstrate that a bolometric experiment with the isotope mass of about 1 ton is capable of reaching the sensitivity to the effective Majorana neutrino mass (|mee|) of order 10-20 meV, thus completely exploring the so-called inverted neutrino mass hierarchy region. We highlight the main challenges and identify priorities for an R&D program addressing them.

D. R. Artusa; F. T. Avignone III; O. Azzolini; M. Balata; T. I. Banks; G. Bari; J. Beeman; F. Bellini; A. Bersani; M. Biassoni; C. Brofferio; C. Bucci; X. Z. Cai; A. Camacho; L. Canonica; X. G. Cao; S. Capelli; L. Carbone; L. Cardani; M. Carrettoni; N. Casali; D. Chiesa; N. Chott; M. Clemenza; C. Cosmelli; O. Cremonesi; R. J. Creswick; I. Dafinei; A. Dally; V. Datskov; A. De Biasi; M. M. Deninno; S. Di Domizio; M. L. di Vacri; L. Ejzak; D. Q. Fang; H. A. Farach; M. Faverzani; G. Fernandes; E. Ferri; F. Ferroni; E. Fiorini; M. A. Franceschi; S. J. Freedman; B. K. Fujikawa; A. Giachero; L. Gironi; A. Giuliani; J. Goett; P. Gorla; C. Gotti; T. D. Gutierrez; E. E. Haller; K. Han; K. M. Heeger; R. Hennings-Yeomans; H. Z. Huang; R. Kadel; K. Kazkaz; G. Keppel; Yu. G. Kolomensky; Y. L. Li; C. Ligi; X. Liu; Y. G. Ma; C. Maiano; M. Maino; M. Martinez; R. H. Maruyama; Y. Mei; N. Moggi; S. Morganti; T. Napolitano; S. Nisi; C. Nones; E. B. Norman; A. Nucciotti; T. O'Donnell; F. Orio; D. Orlandi; J. L. Ouellet; M. Pallavicini; V. Palmieri; L. Pattavina; M. Pavan; M. Pedretti; G. Pessina; V. Pettinacci; G. Piperno; C. Pira; S. Pirro; E. Previtali; V. Rampazzo; C. Rosenfeld; C. Rusconi; E. Sala; S. Sangiorgio; N. D. Scielzo; M. Sisti; A. R. Smith; L. Taffarello; M. Tenconi; F. Terranova; W. D. Tian; C. Tomei; S. Trentalange; G. Ventura; M. Vignati; B. S. Wang; H. W. Wang; L. Wielgus; J. Wilson; L. A. Winslow; T. Wise; A. Woodcraft; L. Zanotti; C. Zarra; B. X. Zhu; S. Zucchelli

2014-04-17T23:59:59.000Z

387

Invertible Symmetric 3 x 3 Binary Matrices and GQ(2,4)  

E-Print Network [OSTI]

We reveal an intriguing connection between the set of 27 (disregarding the identity) invertible symmetric 3 x 3 matrices over GF(2) and the points of the generalized quadrangle GQ(2,4). The 15 matrices with eigenvalue one correspond to a copy of the subquadrangle GQ(2,2), whereas the 12 matrices without eigenvalues have their geometric counterpart in the associated double-six. The fine details of this correspondence, including the precise algebraic meaning/analogue of collinearity, are furnished by employing the representation of GQ(2,4) as a quadric in PG(5,2) of projective index one. An interesting physical application of our findings is also mentioned.

Andrea Blunck; Peter Levay; Metod Saniga; Peter Vrana

2010-09-09T23:59:59.000Z

388

Inkjet printed ambipolar transistors and inverters based on carbon nanotube/zinc tin oxide heterostructures  

SciTech Connect (OSTI)

We report ambipolar field-effect transistors (FETs) consisting of inkjet printed semiconductor bilayer heterostructures utilizing semiconducting single-walled carbon nanotubes (SWCNTs) and amorphous zinc tin oxide (ZTO). The bilayer structure allows for electron transport to occur principally in the amorphous oxide layer and hole transport to occur exclusively in the SWCNT layer. This results in balanced electron and hole mobilities exceeding 2 cm{sup 2} V{sup ?1} s{sup ?1} at low operating voltages (<5?V) in air. We further show that the SWCNT-ZTO hybrid ambipolar FETs can be integrated into functional inverter circuits that display high peak gain (>10). This work provides a pathway for realizing solution processable, inkjet printable, large area electronic devices, and systems based on SWCNT-amorphous oxide heterostructures.

Kim, Bongjun; Jang, Seonpil; Dodabalapur, Ananth, E-mail: ananth.dodabalapur@engr.utexas.edu [Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758 (United States); Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712 (United States); Geier, Michael L.; Prabhumirashi, Pradyumna L. [Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States); Hersam, Mark C. [Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 (United States); Department of Chemistry, Northwestern University, Evanston, Illinois 60208 (United States); Department of Medicine, Northwestern University, Evanston, Illinois 60208 (United States)

2014-02-10T23:59:59.000Z

389

Exploring the Neutrinoless Double Beta Decay in the Inverted Neutrino Hierarchy with Bolometric Detectors  

E-Print Network [OSTI]

Neutrinoless double beta decay (0nubb) is one of the most sensitive probes for physics beyond the Standard Model, providing unique information on the nature of neutrinos. In this paper we review the status and outlook for bolometric 0nubb decay searches. We summarize recent advances in background suppression demonstrated using bolometers with simultaneous readout of heat and light signals. We simulate several configurations of a future CUORE-like bolometer array which would utilize these improvements and present the sensitivity reach of a hypothetical next-generation bolometric 0nubb experiment. We demonstrate that a bolometric experiment with the isotope mass of about 1 ton is capable of reaching the sensitivity to the effective Majorana neutrino mass (|mee|) of order 10-20 meV, thus completely exploring the so-called inverted neutrino mass hierarchy region. We highlight the main challenges and identify priorities for an R&D program addressing them.

Artusa, D R; Azzolini, O; Balata, M; Banks, T I; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Brofferio, C; Bucci, C; Cai, X Z; Camacho, A; Canonica, L; Cao, X G; Capelli, S; Carbone, L; Cardani, L; Carrettoni, M; Casali, N; Chiesa, D; Chott, N; Clemenza, M; Cosmelli, C; Cremonesi, O; Creswick, R J; Dafinei, I; Dally, A; Datskov, V; De Biasi, A; Deninno, M M; Di Domizio, S; di Vacri, M L; Ejzak, L; Fang, D Q; Farach, H A; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Fujikawa, B K; Giachero, A; Gironi, L; Giuliani, A; Goett, J; Gorla, P; Gotti, C; Gutierrez, T D; Haller, E E; Han, K; Heeger, K M; Hennings-Yeomans, R; Huang, H Z; Kadel, R; Kazkaz, K; Keppel, G; Kolomensky, Yu G; Li, Y L; Ligi, C; Liu, X; Ma, Y G; Maiano, C; Maino, M; Martinez, M; Maruyama, R H; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nisi, S; Nones, C; Norman, E B; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, J L; Pallavicini, M; Palmieri, V; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Pettinacci, V; Piperno, G; Pira, C; Pirro, S; Previtali, E; Rampazzo, V; Rosenfeld, C; Rusconi, C; Sala, E; Sangiorgio, S; Scielzo, N D; Sisti, M; Smith, A R; Taffarello, L; Tenconi, M; Terranova, F; Tian, W D; Tomei, C; Trentalange, S; Ventura, G; Vignati, M; Wang, B S; Wang, H W; Wielgus, L; Wilson, J; Winslow, L A; Wise, T; Woodcraft, A; Zanotti, L; Zarra, C; Zhu, B X; Zucchelli, S

2014-01-01T23:59:59.000Z

390

Inverted cones grating for flexible metafilter at optical and infrared frequencies  

SciTech Connect (OSTI)

By combining the antireflective properties from gradual changes in the effective refractive index and cavity coupling from cone gratings and the efficient optical behavior of a tungsten film, a flexible filter showing very broad antireflective properties from the visible to short wavelength infrared region and, simultaneously, a mirror-like behavior in the mid-infrared wavelength region and long-infrared wavelength region has been conceived. Nanoimprint technology has permitted the replication of inverted cone patterns on a large scale on a flexible polymer, afterwards coated with a thin tungsten film. This optical metafilter is of great interest in the stealth domain where optical signature reduction from the optical to short wavelength infrared region is an important matter. As it also acts as selective thermal emitter offering a good solar-absorption/infrared-emissivity ratio, interests are found as well for solar heating applications.

Brckner, Jean-Baptiste; Le Rouzo, Judikal; Escoubas, Ludovic [Aix-Marseille Universit, IM2NP, CNRS-UMR 7334, Domaine Universitaire de Saint-Jrme, Service 231, 13397 Marseille Cedex 20 (France); Brissonneau, Vincent; Dubarry, Christophe [CEA-LITEN DTNM, 17 Avenue des Martyrs, 38054 Grenoble cedex 9 (France); Ferchichi, Abdelkerim; Gourgon, Ccile [LTM CNRS, Laboratoire des Technologies de la Microlectronique 17 Avenue des Martyrs, 38054 Grenoble cedex 9 (France); Berginc, Grard [Thales Optronique S.A., 2 Avenue Gay Lussac, 78990 Elancourt (France)

2014-02-24T23:59:59.000Z

391

Application of GTO voltage source inverter in a hybrid HVDC link  

SciTech Connect (OSTI)

This paper investigates the application of a GTO voltage source inverter in a two-terminal HVdc link, which is fed at the sending end by a line-commutated rectifier. This type of HVdc link may be applied when power transfer is predominantly unidirectional, especially to a weak ac system. The investigations are based on analytical studies and digital time-domain simulations with the Electro-Magnetic Transient program for DC systems (EMTDC). Control method and protection requirements are studied, together with dynamic behavior of the system following disturbances, e.g. dc fault, ac fault, start-up etc. The studies are aimed at exhibiting the technical feasibility of the proposed HVdc scheme. Need for further studies is pointed out when necessary.

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

1994-01-01T23:59:59.000Z

392

Quantum-Dot Intermediate-Band Solar Cells with Inverted Band Alignment  

SciTech Connect (OSTI)

The intermediate-band concept was proposed over a decade ago as a possible route to increase the efficiency of single-junction solar cells. Despite a number of experimental attempts to realize this concept, no efficiency improvement over conventional single-junction solar cells has so far been demonstrated. This is likely due to the fact that the intermediate band itself acts to enhance electron-hole recombination. In this work we propose a novel intermediate-band solar-cell architecture based on doped semiconductor nanostructures having an inverted type-I band alignment with the surrounding host. The recombination of carriers in the nanostructures is prevented by ultra-fast charge transfer to the host, thereby removing the main obstacle to achieve high conversion efficiency.

Francheschetti, A.; Lany, S.; Bester, G.

2008-01-01T23:59:59.000Z

393

3736 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 59, NO. 8, OCTOBER 2010 Asymmetrical Multilevel Inverter for Traction Drives  

E-Print Network [OSTI]

this "one-source" multilevel system. Index Terms--AC motor drives, electric vehicles (EVs), hybrid EVs (HEVs Multilevel Inverter for Traction Drives Using Only One DC Supply Juan Dixon, Senior Member, IEEE, Javier of isolated and floating dc supplies, which makes these converters complicated to implement in electric

Catholic University of Chile (Universidad Católica de Chile)

394

Abstract-The ability of cascaded H-bridge multilevel inverter drives (MLID) to operate under faulty condition including AI-  

E-Print Network [OSTI]

for electric drive application have been discussed in [1]. The cascaded MLID is a general fit for large automotive all-electric drives because of the high VA rating possible and because it uses several dc voltage-phase cascaded multilevel inverter drive for an electric vehicle is illustrated in Fig. 1. The series of H

Tolbert, Leon M.

395

Abstract--Traditionally, importance of efficiency is valued highest for PV (Photovoltaic) inverters. The driving factors are  

E-Print Network [OSTI]

Abstract--Traditionally, importance of efficiency is valued highest for PV (Photovoltaic) inverters to the market due to practical considerations of manufacturers and customers (agency norms, EMI, reliability etc made to gain every fraction of efficiency, in order to sustain in the market. B. Reliability Once

Paderborn, Universität

396

Real Time Selective Harmonic Minimization for Multilevel Inverters Connected to Solar Panels Using Artificial Neural Network Angle Generation  

E-Print Network [OSTI]

Real Time Selective Harmonic Minimization for Multilevel Inverters Connected to Solar Panels Using varying DC input sources. Five 195 W solar panels were used as the DC source for each full bridge cells or solar panels and will consequently bring a voltage unbalance depending on the system dynamics

Tolbert, Leon M.

397

Inverter VAR Control for Distribution Systems with Masoud Farivar, Christopher R. Clarke, Steven H. Low , K. Mani Chandy  

E-Print Network [OSTI]

in [8], [9]. In Section IV, we present a simulation study of a real-world distribution circ solvable. Simulations of a real-world distribution circuit illustrates that the proposed inverter control by Southern California Edison's (SCE) plan to install 500MW of large commercial rooftop PV plants (each

Low, Steven H.

398

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 22, NO. 3, MAY 2007 815 Design of Resonant Inverters for Optimal Efficiency  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 22, NO. 3, MAY 2007 815 Design of Resonant Inverters for Optimal Efficiency Over Lamp Life in Electronic Ballast With Phase Control Francisco J. Azcondo, Senior was presented in part at The 20th Annual IEEE Applied Power Electronics Conference and Exposition (APEC'05

399

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel Inverted Pendulum  

E-Print Network [OSTI]

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel underac- tuated mechanical system: the inertia wheel inverted pendulum. Numerical simulations as well: the ball and beam [9] (where the dynamics of the beam has not been taken into account) and the Planar

Paris-Sud XI, Université de

400

The effect of weaving maneuvers on operation of a free right-turn lane at ramp terminals  

E-Print Network [OSTI]

-turn vehicles on a departure leg. If the ramp terminal is closely followed by the next downstream intersection, weaving maneuvers will occur since some vehicles make a right turn at the ramp terminal and make a left turn at the downstream intersection...

Park, Minchul

2006-04-12T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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.


401

Bank-to-Turn Control for a Small UAV using Backstepping and Parameter  

E-Print Network [OSTI]

Bank-to-Turn Control for a Small UAV using Backstepping and Parameter Adaptation Dongwon Jung unmanned aerial vehicle (UAV). Assuming the UAV is equipped with an autopilot for low level control, we the applicability of the algorithm on a real system. 1. INTRODUCTION For decades unmanned aerial vehicles (UAVs

Tsiotras, Panagiotis

402

MAGNETOSPHERIC RESPONSE TIMES FOLLOWING SOUTHWARD IMF TURNINGS N. E. Turner and D. N. Baker  

E-Print Network [OSTI]

. Introduction Southward turnings of the IMF are known to initi- ate the transfer of energy from the solar wind, University of Colorado Boulder, CO T. I. Pulkkinen Finnish Meteorological Institute Helsinki, Finland H. J:2 minutes after the solar wind change reached the magnetopause and continued to recon g- ure forabout 13 min

California at Berkeley, University of

403

It's Too Complicated, So I Turned It Off! Expectations, Perceptions, and Misconceptions of  

E-Print Network [OSTI]

, and misconceptions of personal firewalls. Through a qualitative analysis of the data, we found that most of ourIt's Too Complicated, So I Turned It Off! Expectations, Perceptions, and Misconceptions of Personal Even though personal firewalls are an important aspect of security for the users of personal computers

404

LX-17 and ufTATB Data for Corner-Turning, Failure and Detonation  

SciTech Connect (OSTI)

Data is presented for the size (diameter) effect for ambient and cold confined LX-17, unconfined ambient LX-17, and confined ambient ultrafine TATB. Ambient, cold and hot double cylinder corner-turning data for LX-17, PBX 9502 and ufTATB is presented. Transverse air gap crossing in ambient LX-17 is studied with time delays given for detonations that cross.

Souers, P C; Lauderbach, L; Garza, R; Vitello, P; Hare, D E

2010-02-03T23:59:59.000Z

405

Wind Energy in Indian Country: Turning to Wind for the Seventh Generation  

E-Print Network [OSTI]

Wind Energy in Indian Country: Turning to Wind for the Seventh Generation by Andrew D. Mills: ___________________________________________ Jane Stahlhut Date #12;Wind Energy in Indian Country A.D. Mills Abstract - ii - Abstract Utility-scale wind projects are increasingly being developed in rural areas of the United States. In the West

Kammen, Daniel M.

406

Turning Relational DBMS into Nested Relational DBMS GeneticXchange, Inc  

E-Print Network [OSTI]

Turning Relational DBMS into Nested Relational DBMS Jing Chen GeneticXchange, Inc chenjing previously been described [24, 23], the details of its interface to relational DBMS and other sources have never been published. In this paper, we describe the Kleisli's interface to relational DBMS

Wong, Limsoon

407

Your Turn : Interactive Story Continuing Agent Report of Surveying Paper Works  

E-Print Network [OSTI]

story continuing agent based on to-date storytelling systems. We introduce our framework and discuss diverse in great variety, including character-based storytelling systems [1], interactive story authoringYour Turn : Interactive Story Continuing Agent Report of Surveying Paper Works Edward Yu-Te Shen

Ouhyoung, Ming

408

Supplement to: Evidence of a possible turning point in solar UV-B over  

E-Print Network [OSTI]

Supplement to: Evidence of a possible turning point in solar UV-B over Canada, Europe and Japan C Observatory Lindenberg, German Meteorological Service, Germany [7] Climate Change Unit, Finnish Meteorological to ground-based AOD changes at 320nm at Thessaloniki (upper panel) and Lindenberg (lower panel). #12;Figure

Meskhidze, Nicholas

409

A Study on Crosstalk Analysis in Aggregative Transmission Lines with Turning Vias Tapobrata Bandyopadhyay1  

E-Print Network [OSTI]

A Study on Crosstalk Analysis in Aggregative Transmission Lines with Turning Vias Tapobrata and signal integrity in high-speed signal channels is extremely important. Transmission lines and vias transmission lines (4 mil width) of different lengths arranged in bundles. The eight transmission line bundles

Swaminathan, Madhavan

410

The dynamic cusp aurora on 30 November 1997: response to southward turning of the IMF  

E-Print Network [OSTI]

The dynamic cusp aurora on 30 November 1997: response to southward turning of the IMF P. E a Accepted: 26 January 1999 Abstract. We document the detailed dynamics of the dayside aurora in the $1200cation of both the red (630.0 nm) and green (557.7 nm) line emissions in the cusp aurora near 1200 MLT and $100

Paris-Sud XI, Universit de

411

Estimated Savings from Turning Off Unnecessary Electrical Loads During Unoccupied Periods at the Langford Architecture Center  

E-Print Network [OSTI]

in those studios during unoccupied hours. Turning off the lights on the third and fourth floor studios would reduce the electricity cost by $4,757 per year and the associated heating and cooling costs by an additional $583 for a total savings of $5...

Soebarto, V. I.; Haberl, J. S.; Degelman, L. O.

1996-01-01T23:59:59.000Z

412

Mimicry of Sharp Turning Behaviours in a Robotic Fish* Jindong Liu Huosheng Hu  

E-Print Network [OSTI]

Mimicry of Sharp Turning Behaviours in a Robotic Fish* Jindong Liu Huosheng Hu Department is supported by London Aquarium Ltd. Abstract - In nature, fish has astonishing swimming ability after thousands years of evolution. To realise fish-like swimming behaviours by a robotic system poses tremendous

Hu, Huosheng

413

Energy-Saving Tips 1. Turn the radiator off when you are out.  

E-Print Network [OSTI]

the windows. 4. Turn the heating down. As well as wasting energy, having your room too hot is bad for you your mobile phone charger at the wall when you are not using it. 16. Use energy efficient light bulbs the thermostat instead of reaching for a jumper 15% wash clothes at 90C Brits waste more energy than

Brierley, Andrew

414

New Switches for Utility-Scale Inverters: First In-Class Demonstration of a Completely New Type of SiC Bipolar Switch (15kV-20kV) for Utility-Scale Inverters  

SciTech Connect (OSTI)

Solar ADEPT Project: The SiCLAB is developing a new power switch for utility-scale PV inverters that would improve the performance and significantly reduce the size, weight, and energy loss of PV systems. A power switch controls the electrical energy flowing through an inverter, which takes the electrical current from a PV solar panel and converts it into the type and amount of electricity that is compatible with the electric grid. SiCLAB is using silicon carbide (SiC) semiconductors in its new power switches, which are more efficient than the silicon semiconductors used to conduct electricity in most conventional power switches today. Switches with SiC semiconductors can operate at much higher temperatures, as well as higher voltage and power levels than silicon switches. SiC-based power switches are also smaller than those made with silicon alone, so they result in much smaller and lighter electrical devices. In addition to their use in utility-scale PV inverters, SiCLABs new power switches can also be used in wind turbines, railways, and other smart grid applications.

None

2011-12-31T23:59:59.000Z

415

Three-Phase Modular Cascaded H-Bridge Multilevel Inverter with Individual MPPT for Grid-Connected Photovoltaic Systems  

SciTech Connect (OSTI)

A three-phase modular cascaded H-bridge multilevel inverter for a grid-connected photovoltaic (PV) system is presented in this paper. To maximize the solar energy extraction of each PV string, an individual maximum power point tracking (MPPT) control scheme is applied, which allows the independent control of each dc-link voltage. PV mismatches may introduce unbalanced power supplied to the three-phase system. To solve this issue, a control scheme with modulation compensation is proposed. The three-phase modular cascaded multilevel inverter prototype has been built. Each H-bridge is connected to a 185 W solar panel. Simulation and experimental results are presented to validate the proposed ideas.

Xiao, Bailu [ORNL; Hang, Lijun [ORNL; Riley, Cameron [University of Tennessee, Knoxville (UTK); Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL

2013-01-01T23:59:59.000Z

416

Zinc Oxide Modified with Benzylphosphonic Acids as Transparent Electrodes in Regular and Inverted Organic Solar Cell Structures  

E-Print Network [OSTI]

An approach is presented to modify the WF of solution-processed sol-gel derived ZnOover an exceptionally wide range of more than 2.3 eV. This approach relies on the formation of dense and homogeneous self-assembled monolayers based on phosphonic acids with different dipole moments. This allows us to apply ZnO as charge selective bottom electrodes in either regular or inverted solar cell structures, using P3HT:PCBM as the active layer. These devices compete with or even exceed the performance of the reference cell on ITO/PEDOT:PSS. Our finding challenges the current view that bottom electrodes in inverted solar cells need to be electron-blocking for good device performance.

Ilja Lange; Sina Reiter; Juliane Kniepert; Fortunato Piersimoni; Michael Paetzel; Jana Hildebrandt; Thomas Brenner; Stefan Hecht; Dieter Neher

2015-02-05T23:59:59.000Z

417

A Structure-Preserving Model and Sufficient Condition for Frequency Synchronization of Lossless Droop Inverter-Based AC Networks  

SciTech Connect (OSTI)

This paper presents a new method for analysis of frequency synchronization of lossless power networks whose sources are frequency-droop controlled inverters. Unlike most existing approaches, our method focuses on the interaction between inverters and the network to provide new physical insight into how those interactions create frequency synchronization. We introduce two structure-preserving models of such a network (one bus-oriented and one line-oriented), and show that frequency synchronization corresponds to convergence to an equilibrium of these models. We derive a necessary condition for existence of such equilibria, and determine a simple test for their local stability. Finally, we introduce a sufficient condition for frequency synchronization of such networks, and show that it consists of a set of local criteria which can each be determined from local measurements.

Ainsworth, Nathan G [ORNL] [ORNL; Grijalva, Prof. Santiago [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta

2013-01-01T23:59:59.000Z

418

CUORE and beyond: bolometric techniques to explore inverted neutrino mass hierarchy  

E-Print Network [OSTI]

The CUORE (Cryogenic Underground Observatory for Rare Events) experiment will search for neutrinoless double beta decay of $^{130}$Te. With 741 kg of TeO$_2$ crystals and an excellent energy resolution of 5 keV (0.2%) at the region of interest, CUORE will be one of the most competitive neutrinoless double beta decay experiments on the horizon. With five years of live time, CUORE projected neutrinoless double beta decay half-life sensitivity is $1.6\\times 10^{26}$ y at $1\\sigma$ ($9.5\\times10^{25}$ y at the 90% confidence level), which corresponds to an upper limit on the effective Majorana mass in the range 40--100 meV (50--130 meV). Further background rejection with auxiliary light detector can significantly improve the search sensitivity and competitiveness of bolometric detectors to fully explore the inverted neutrino mass hierarchy with $^{130}$Te and possibly other double beta decay candidate nuclei.

D. R. Artusa; F. T. Avignone III; O. Azzolini; M. Balata; T. I. Banks; G. Bari; J. Beeman; F. Bellini; A. Bersani; M. Biassoni; C. Brofferio; C. Bucci; X. Z. Cai; A. Camacho; L. Canonica; X. G. Cao; S. Capelli; L. Carbone; L. Cardani; M. Carrettoni; N. Casali; D. Chiesa; N. Chott; M. Clemenza; S. Copello; C. Cosmelli; O. Cremonesi; R. J. Creswick; I. Dafinei; A. Dally; V. Datskov; A. De Biasi; M. M. Deninno; S. Di Domizio; M. L. di Vacri; L. Ejzak; D. Q. Fang; H. A. Farach; M. Faverzani; G. Fernandes; E. Ferri; F. Ferroni; E. Fiorini; M. A. Franceschi; S. J. Freedman; B. K. Fujikawa; A. Giachero; L. Gironi; A. Giuliani; J. Goett; P. Gorla; C. Gotti; T. D. Gutierrez; E. E. Haller; K. Han; K. M. Heeger; R. Hennings-Yeomans; H. Z. Huang; R. Kadel; K. Kazkaz; G. Keppel; Yu. G. Kolomensky; Y. L. Li; C. Ligi; X. Liu; Y. G. Ma; C. Maiano; M. Maino; M. Martinez; R. H. Maruyama; Y. Mei; N. Moggi; S. Morganti; T. Napolitano; S. Nisi; C. Nones; E. B. Norman; A. Nucciotti; T. O'Donnell; F. Orio; D. Orlandi; J. L. Ouellet; M. Pallavicini; V. Palmieri; L. Pattavina; M. Pavan; M. Pedretti; G. Pessina; V. Pettinacci; G. Piperno; C. Pira; S. Pirro; E. Previtali; V. Rampazzo; C. Rosenfeld; C. Rusconi; E. Sala; S. Sangiorgio; N. D. Scielzo; M. Sisti; A. R. Smith; L. Taffarello; M. Tenconi; F. Terranova; W. D. Tian; C. Tomei; S. Trentalange; G. Ventura; M. Vignati; B. S. Wang; H. W. Wang; L. Wielgus; J. Wilson; L. A. Winslow; T. Wise; A. Woodcraft; L. Zanotti; C. Zarra; B. X. Zhu; S. Zucchelli

2014-07-04T23:59:59.000Z

419

Testing of a naturally aged nuclear power plant inverter and battery charger  

SciTech Connect (OSTI)

A naturally aged inverter and battery charger were obtained from the Shippingport facility. This equipment was manufactured in 1974, and was installed at Shippingport in 1975 as part of a major plant modification. Testing was performed on this equipment under the auspices of the NRC's Nuclear Plant Aging Research (NPAR) Program to evaluate the type and extent of degradation due to aging, and to determine the effectiveness of condition monitoring techniques which could be used to detect aging effects. Steady state testing was conducted over the equipment's entire operating range. Step load changes were also initiated in order to monitor the electrical response. During this testing, component temperatures were monitored and circuit waveforms analyzed. Results indicated that aging had not substantially affected equipment operation. On the other hand, when compared with original acceptance test data, the monitoring techniques employed were sensitive to changes in measurable component and equipment parameters indicating the viability of detecting degradation prior to catastrophic failure. 7 refs., 34 figs., 12 tabs.

Gunther, W.E.

1988-09-01T23:59:59.000Z

420

Temperature-Dependent Measurements of an Inverted Metamorphic Multijunction (IMM) Solar Cell: Preprint  

SciTech Connect (OSTI)

The inverted metamorphic multijunction (IMM) solar cell has demonstrated efficiencies as high as 40.8% at 25 degrees C and 326 suns concentration. The actual operating temperature in a commercial module, however, is likely to be as much as 50-70 degrees C hotter, reaching as high as 100 degrees C. In order to be able to evaluate the cell performance under these real-world operating conditions, we have measured the open-circuit voltage, short-circuit current density and efficiency at temperatures up to 125 degrees C and concentrations up to 1000 suns, as well as the temperature coefficients of these parameters. Spectral response and one-sun current-voltage characteristics were measured by carefully adjusting the incident spectrum to selectively current-limit the different subcells. Concentrator measurements were taken on a pulsed solar simulator to minimize any additional heating due to the high intensity illumination. We compare our measured values to predictions based on detailed models of various triple junction solar cells. By choosing the optimum bandgaps for high temperature operation, the IMM can potentially result in greater energy production and lower temperature sensitivity under real operating conditions than a Ge-based solar cell.

Steiner, M. A.; Geisz, J. F.; Friedman, D. J.; Olavarria, W. J.; Duda, A.; Moriarty, T. E.

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

CUORE and beyond: bolometric techniques to explore inverted neutrino mass hierarchy  

E-Print Network [OSTI]

The CUORE (Cryogenic Underground Observatory for Rare Events) experiment will search for neutrinoless double beta decay of $^{130}$Te. With 741 kg of TeO$_2$ crystals and an excellent energy resolution of 5 keV (0.2%) at the region of interest, CUORE will be one of the most competitive neutrinoless double beta decay experiments on the horizon. With five years of live time, CUORE projected neutrinoless double beta decay half-life sensitivity is $1.6\\times 10^{26}$ y at $1\\sigma$ ($9.5\\times10^{25}$ y at the 90% confidence level), which corresponds to an upper limit on the effective Majorana mass in the range 40--100 meV (50--130 meV). Further background rejection with auxiliary light detector can significantly improve the search sensitivity and competitiveness of bolometric detectors to fully explore the inverted neutrino mass hierarchy with $^{130}$Te and possibly other double beta decay candidate nuclei.

Artusa, D R; Azzolini, O; Balata, M; Banks, T I; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Brofferio, C; Bucci, C; Cai, X Z; Camacho, A; Canonica, L; Cao, X G; Capelli, S; Carbone, L; Cardani, L; Carrettoni, M; Casali, N; Chiesa, D; Chott, N; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, R J; Dafinei, I; Dally, A; Datskov, V; De Biasi, A; Deninno, M M; Di Domizio, S; di Vacri, M L; Ejzak, L; Fang, D Q; Farach, H A; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Fujikawa, B K; Giachero, A; Gironi, L; Giuliani, A; Goett, J; Gorla, P; Gotti, C; Gutierrez, T D; Haller, E E; Han, K; Heeger, K M; Hennings-Yeomans, R; Huang, H Z; Kadel, R; Kazkaz, K; Keppel, G; Kolomensky, Yu G; Li, Y L; Ligi, C; Liu, X; Ma, Y G; Maiano, C; Maino, M; Martinez, M; Maruyama, R H; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nisi, S; Nones, C; Norman, E B; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, J L; Pallavicini, M; Palmieri, V; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Pettinacci, V; Piperno, G; Pira, C; Pirro, S; Previtali, E; Rampazzo, V; Rosenfeld, C; Rusconi, C; Sala, E; Sangiorgio, S; Scielzo, N D; Sisti, M; Smith, A R; Taffarello, L; Tenconi, M; Terranova, F; Tian, W D; Tomei, C; Trentalange, S; Ventura, G; Vignati, M; Wang, B S; Wang, H W; Wielgus, L; Wilson, J; Winslow, L A; Wise, T; Woodcraft, A; Zanotti, L; Zarra, C; Zhu, B X; Zucchelli, S

2014-01-01T23:59:59.000Z

422

Inverting Color-Magnitude Diagrams to Access Precise Star Cluster Parameters: A Bayesian Approach  

E-Print Network [OSTI]

We demonstrate a new Bayesian technique to invert color-magnitude diagrams of main sequence and white dwarf stars to reveal the underlying cluster properties of age, distance, metallicity, and line-of-sight absorption, as well as individual stellar masses. The advantages our technique has over traditional analyses of color-magnitude diagrams are objectivity, precision, and explicit dependence on prior knowledge of cluster parameters. Within the confines of a given set of often-used models of stellar evolution, the initial-final mass relation, and white dwarf cooling, and assuming photometric errors that one could reasonably achieve with the Hubble Space Telescope, our technique yields exceptional precision for even modest numbers of cluster stars. For clusters with 50 to 400 members and one to a few dozen white dwarfs, we find typical internal errors of sigma([Fe/H]) <= 0.03 dex, sigma(m-M) <= 0.02 mag, and sigma(Av) <= 0.01 mag. We derive cluster white dwarf ages with internal errors of typically only 10% for clusters with only three white dwarfs and almost always <= 5% with ten white dwarfs. These exceptional precisions will allow us to test white dwarf cooling models and standard stellar evolution models through observations of white dwarfs in open and globular clusters.

Ted von Hippel; William H. Jefferys; James Scott; Nathan Stein; D. E. Winget; Steven DeGennaro; Albert Dam; Elizabeth Jeffery

2006-03-17T23:59:59.000Z

423

A Novel Current Angle Control Scheme in a Current Source Inverter Fed Permanent Magnet Synchronous Motor Drive for Automotive Applications  

SciTech Connect (OSTI)

This paper describes a novel speed control scheme to operate a current source inverter (CSI) driven surface-mounted permanent magnet synchronous machine (SPMSM) for hybrid electric vehicles (HEVs) applications. The idea is to use the angle of the current vector to regulate the rotor speed while keeping the two dc-dc converter power switches on all the time to boost system efficiency. The effectiveness of the proposed scheme was verified with a 3 kW CSI-SPMSM drive prototype.

Tang, Lixin [ORNL] [ORNL; Su, Gui-Jia [ORNL] [ORNL

2011-01-01T23:59:59.000Z

424

Performance Analysis of Positive-feedback-based Active Anti-islanding Schemes for Inverter-Based Distributed Generators  

SciTech Connect (OSTI)

Recently proposed positive-feedback-based anti-islanding schemes (AI) are highly effective in preventing islanding without causing any degradation in power quality. This paper aims to analyze the performance of these schemes quantitatively in the context of the dynamic models of inverter-based distributed generators (DG). In this study, the characteristics of these active anti-islanding methods are discussed and design guidelines are derived.

Du, Pengwei; Aponte, Erick E.; Nelson, J. Keith

2010-06-14T23:59:59.000Z

425

Evaluation of Correlation of Cell Cycle Proteins and Ki-67 Interaction in Paranasal Sinus Inverted Papilloma Prognosis and Squamous Cell Carcinoma Transformation  

E-Print Network [OSTI]

The recurrent sinonasal inverted papilloma (IP) could be transformed to sinonasal squamous cell carcinoma. We use protein expression patterns by immunohistochemical method to see whether the expression of p53, p16, p21, ...

Tsou, Yung-An

426

Electroless vs electrodeposited Ni-P alloys for diamond turning applications  

SciTech Connect (OSTI)

Electrolytes nickel deposits with greater than 10% phosphorous have been widely used for diamond turning applications such as fabrications of large optics and other high precision parts. Although the coatings have worked well, they are not without their drawbacks. Porosity and nodule formation have been problems as well as the difficulty of obtaining deposits greater than about 75 {mu}m. In recent years much effort has been directed at the investigating electrodeposition of Ni-P alloys in an attempt to avoid these problems. The purpose of this paper is to compare diamond turning results for both electroless and electrodeposited alloys and speculate about the future uses of electrodeposited Ni-P for precision finishing applications. 16 refs., 7 figs.

Dini, J.W.

1991-07-01T23:59:59.000Z

427

Turning a negative into a positive: Researchers find promising use for excessive nitrate  

E-Print Network [OSTI]

acre of nitrogen for each inch of water applied. tx H2O | pg. 17 _ Turning a negative into a positive tx H2O | pg. 18 According to Sij, previous research has shown that properly designed and managed drip irrigation systems reduce deep percola... agencies involved in the project were local soil and water conservation districts, U.S. Department of Agriculture?s Natural Resources Conservation Service, the Texas AgriLife Extension Service, and Rolling Plains Groundwater Conservation District...

Wythe, Kathy

2009-01-01T23:59:59.000Z

428

Permitted Oxygen Abundances and the Temperature Scale of Metal-Poor Turn-Off Stars  

E-Print Network [OSTI]

We use high quality VLT/UVES published data of the permitted OI triplet and FeII lines to determine oxygen and iron abundances in unevolved (dwarfs, turn-off, subgiants) metal-poor halo stars. The calculations have been performed both in LTE and NLTE, employing effective temperatures obtained with the new infrared flux method (IRFM) temperature scale by Ramirez & Melendez, and surface gravities from Hipparcos parallaxes and theoretical isochrones. A new list of accurate transition probabilities for FeII lines, tied to the absolute scale defined by laboratory measurements, has been used. We find a plateau in the oxygen-to-iron ratio over more than two orders of magnitude in iron abundance (-3.2 < [Fe/H] < -0.7), with a mean [O/Fe] = 0.5 dex (sigma = 0.1 dex), independent of metallicity, temperature and surface gravity. According to the new IRFM Teff scale, the temperatures of turn-off halo stars strongly depend on metallicity, a result that is in excellent qualitative and quantitative agreement with stellar evolution calculations, which predict that the Teff of the turn-off at [Fe/H] = -3 is about 600-700 K higher than that at [Fe/H] = -1.

J. Melendez; N. G. Shchukina; I. E. Vasiljeva; I. Ramirez

2006-01-12T23:59:59.000Z

429

Modified Extraction Scheme for the CERN PS Multi-Turn Extraction  

E-Print Network [OSTI]

High-activation of the extraction magnetic septum of the CERN PS machine was observed due to the losses of the continuous beam extracted via the Multi-Turn Extraction (MTE) method. A possible mitigation measure consists of using an existing electrostatic septum, located upstream of the extraction magnetic septum, to deflect the beam. This would highly decrease the beam losses, and hence the induced activation, during the rise time of the MTE kickers due to the reduced thickness of the electrostatic septum with respect to the magnetic one. The layout of this new extraction will be described in detail and the results of beam measurements presented.

Gilardoni, S; Hernalsteens, C; Lachaize, A; Mtral, G

2012-01-01T23:59:59.000Z

430

Surface finish measurements of diamond-turned electroless-nickel-plated mirrors  

SciTech Connect (OSTI)

Surface roughness data are presented for a matrix of diamond-turned electroless nickel samples having a combination of six phosphorus contents and four heat treatments. Roughness measurements were conducted with commercial optical and stylus profilers (WYKO and Talystep). The results are discussed in terms of the material composition and heat treatment, plus other factors having an observed influence on the surface roughness. For the optimum material properties, full-length (665..mu..m) 20x WYKO scans yielded values of better than 10 A rms after correction for instrument roll-off.

Taylor, J.S.; Syn, C.K.; Saito, T.T.; Donaldson, R.R.

1986-09-01T23:59:59.000Z

431

Surface finish measurements of diamond-turned electroless-nickel-plated mirrors  

SciTech Connect (OSTI)

Surface roughness data are presented for a matrix of diamond-turned electroless-nickel samples having a combination of six phosphorous contents and four heat treatments. Roughness measurements were conducted with commercial optical and stylus profilometers (Wyko and Talystep). The results are discussed in terms of the material composition and heat treatment, plus other factors having an observed influence on the surface roughness. For the optimum material properties, full-length (665 ..mu..m) restored 20X Wyko scans yielded values of better than 10A rms.

Taylor, J.S.; Syn, C.K.; Saito, T.T.; Donaldson, R.R.

1985-08-16T23:59:59.000Z

432

Turning the Manhattan Project into a National Park | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatusButlerTransportation6/14/11 Page 1 ofTurning the Manhattan

433

BPA Turns 75: A Look Back and a Look Ahead | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program CumulusA t iBudget2/4/139/4/2012BPABPA Turns 75: A

434

Discrete magic angle turning system, apparatus, and process for in situ magnetic resonance spectroscopy and imaging  

DOE Patents [OSTI]

Described are a "Discrete Magic Angle Turning" (DMAT) system, devices, and processes that combine advantages of both magic angle turning (MAT) and magic angle hopping (MAH) suitable, e.g., for in situ magnetic resonance spectroscopy and/or imaging. In an exemplary system, device, and process, samples are rotated in a clockwise direction followed by an anticlockwise direction of exactly the same amount. Rotation proceeds through an angle that is typically greater than about 240 degrees but less than or equal to about 360 degrees at constant speed for a time applicable to the evolution dimension. Back and forth rotation can be synchronized and repeated with a special radio frequency (RF) pulse sequence to produce an isotropic-anisotropic shift 2D correlation spectrum. The design permits tubes to be inserted into the sample container without introducing plumbing interferences, further allowing control over such conditions as temperature, pressure, flow conditions, and feed compositions, thus permitting true in-situ investigations to be carried out.

Hu, Jian Zhi (Richland, WA); Sears, Jr., Jesse A. (Kennewick, WA); Hoyt, David W. (Richland, WA); Wind, Robert A. (Kennewick, WA)

2009-05-19T23:59:59.000Z

435

Highly-complex optical signal generation using electro-optical systems with non-linear, non-invertible transmission functions  

E-Print Network [OSTI]

We present a scheme whereby a static non-linear, non-invertible transmission function performed by the electro-optic Mach-Zehnder modulator produces highly complex optical chaos. The scheme allows the deterministic transformation of low-dimensional band-limited chaotic signals into much higher-dimensional structures with broadband spectra and without using any delay elements or feedback. Standard benchmark tests show that all the considered complexity indices are highly increased due to this transformation in a controlled fashion. This mechanism allows the design of simple optoelectronic delayed oscillators with extremely complex chaotic output.

Jos J. Surez-Vargas; Bicky A. Mrquez; Jorge A. Gonzlez

2012-08-06T23:59:59.000Z

436

CRADA Final Report for CRADA Number ORNL98-0521 : Development of an Electric Bus Inverter Based on ORNL Auxiliary Resonant Tank (ART) Soft-Switching Technology  

SciTech Connect (OSTI)

The Power Electronics and Electric Machinery Research Center (PEEMRC) of Oak Ridge National Laboratory (ORNL) has for many years been developing technologies for power converters for motor drives and many other applications. Some of the research goals are to improve efficiency and reduce audible and electromagnetic interference noise generation for inverters and the driven loads. The converters are being required to produce more power with reduced weight and volume, which requires improvements in heat removal from the electronics, as well as improved circuit designs that have fewer electrical losses. PEEMRC has recently developed and patented a soft-switching inverter topology called an Auxiliary Resonant Tank (ART), and this design has been tested and proven at ORNL using a 10-kW laboratory prototype. The objective of this project was to develop, test, and install the ART inverter technology in an electric transit bus with the final goal of evaluating performance of the ORNL inverter under field conditions in a vehicle. A scaled-up inverter with the capacity to drive a 22-e bus was built based on the 10-kW ORNL laboratory prototype ART soft-switching inverter. Most (if not all) commercially available inverters for traction drive and other applications use hard-switching inverters. A Cooperative Research and Development Agreement was established with the Chattanooga Area Regional Transit Authority (CARTA), the Electric Transit Vehicle Institute (ETVI), and Advanced Vehicle Systems (AVS), all of Chattanooga, along with ORNL. CARTA, which maintains and operates the public transit system in Chattanooga, provided an area for testing the vehicle alongside other similar vehicles in the normal operating environment. ETVI offers capabilities in standardized testing and reporting and also provides exposure in the electric transit vehicle arena for ORNL's technologies. The third Chattanooga partner, (AVS) manufactures all-electric and hybrid electric transit buses using inverter drive systems from several manufacturers. AVS provided help in field installation, and parts for laboratory testing. A 100-kW field-ready unit was developed, tested in an ORNL laboratory, and installed and successfully operated in a CARTA bus in Chattanooga. The tests on the vehicle were performed at a CARTA maintenance facility and at a l-mile test track in Chattanooga managed by CARTA.

Ayers, C.W.

2001-05-08T23:59:59.000Z

437

Design of diamond turned holograms by the nonlinear conjugate gradients method Colin Dankwart, Claas Falldorf and Jurgen Jahns  

E-Print Network [OSTI]

Design of diamond turned holograms by the nonlinear conjugate gradients method Colin Dankwart investigate a different optimization approach, the nonlinear conjugate gradients (NCG) method. The NGC method design algorithm, based on the generalized projections method (GPM) [?] was established, taking

Jahns, Jrgen

438

Turn-on fluorescence in tetraphenylethylene-based metal-organic frameworks: An alternative to aggregation-induced emission  

E-Print Network [OSTI]

Coordinative immobilization of functionalized tetraphenylethylene within rigid porous metalorganic frameworks (MOFs) turns on fluorescence in the typically non-emissive tetraphenylethylene core. The matrix coordination-induced ...

Shustova, Natalia B.

439

County looks at turning waste ash into money Two companies using grant to investigate ways to recycle incinerator byproduct  

E-Print Network [OSTI]

County looks at turning waste ash into money Two companies using grant to investigate ways Ellen O'Connor. The research money totals $240,000. "Looking down the road and recognizing that waste

Columbia University

440

NREL/SCE High-Penetration PV Integration Project: Report on Field Demonstration of Advanced Inverter Functionality in Fontana, CA  

SciTech Connect (OSTI)

The National Renewable Energy Laboratory/Southern California Edison High-Penetration PV Integration Project is (1) researching the distribution system level impacts of high-penetration photovoltaic (PV) integration, (2) determining mitigation methods to reduce or eliminate those impacts, and (3) seeking to demonstrate these mitigation methods on actual high-penetration PV distribution circuits. This report describes a field demonstration completed during the fall of 2013 on the Fontana, California, study circuit, which includes a total of 4.5 MW of interconnected utility-scale rooftop PV systems. The demonstration included operating a 2-MW PV system at an off-unity power factor that had been determined during previously completed distribution system modeling and PV impact assessment analyses. Data on the distribution circuit and PV system operations were collected during the 2-week demonstration period. This demonstration reinforces the findings of previous laboratory testing that showed that utility-scale PV inverters are capable of operating at off-unity power factor to mitigate PV impacts; however, because of difficulties setting and retaining PV inverter power factor set points during the field demonstration, it was not possible to demonstrate the effectiveness of off-unity power factor operation to mitigate the voltage impacts of high-penetration PV integration. Lessons learned from this field demonstration are presented to inform future field demonstration efforts.

Mather, B.

2014-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

On Zero Steady-State Error Voltage Control of Single-Phase PWM Inverters With Different Load Types  

SciTech Connect (OSTI)

This paper comprehensively investigates and compares different multiloop linear control schemes for single-phase pulsewidth modulation inverters, both in stationary and synchronous (d-q) frames, by focusing on their steady-state error under different loading conditions. Specifically, it is shown how proportional plus resonant (P + R) control and load current feedback (LCF) control can, respectively, improve the steady-state and transient performance of the inverter, leading to the proposal of a PID + R + LCF control scheme. Furthermore, the LCF control and capacitive current feedback control schemes are shown to be subject to stability issues under second and higher order filter loads. Additionally, the equivalence between the stationary frame and d-q frame controllers is discussed depending on the orthogonal term generation method, and a d-q frame voltage control strategy is proposed eliminating the need for the generation of this orthogonal component. This is achieved while retaining all the advantages of operating in the synchronous d-q frame, i.e., zero steady-state error and ease of implementation. All theoretical findings are validated experimentally using a 1.5 kW laboratory prototype.

Dong, Dong [Virginia Polytechnic Institute and State University (Virginia Tech); Timothy, Thacker [Virginia Polytechnic Institute and State University (Virginia Tech); Burgos, Rolando [ABB; Wang, Fei [ORNL; Boroyevich, Dushan [Virginia Polytechnic Institute and State University (Virginia Tech)

2011-01-01T23:59:59.000Z

442

Large scale dynamics of the Persistent Turning Walker model of fish behavior  

E-Print Network [OSTI]

This paper considers a new model of individual displacement, based on fish motion, the so-called Persistent Turning Walker (PTW) model, which involves an Ornstein-Uhlenbeck process on the curvature of the particle trajectory. The goal is to show that its large time and space scale dynamics is of diffusive type, and to provide an analytic expression of the diffusion coefficient. Two methods are investigated. In the first one, we compute the large time asymptotics of the variance of the individual stochastic trajectories. The second method is based on a diffusion approximation of the kinetic formulation of these stochastic trajectories. The kinetic model is a Fokker-Planck type equation posed in an extended phase-space involving the curvature among the kinetic variables. We show that both methods lead to the same value of the diffusion constant. We present some numerical simulations to illustrate the theoretical results.

Pierre Degond; Sbastien Motsch

2007-10-26T23:59:59.000Z

443

Electrical system for pulse-width modulated control of a power inverter using phase-shifted carrier signals and related operating methods  

DOE Patents [OSTI]

Systems and methods are provided for pulse-width modulated control of power inverter using phase-shifted carrier signals. An electrical system comprises an energy source and a motor. The motor has a first set of windings and a second set of windings, which are electrically isolated from each other. An inverter module is coupled between the energy source and the motor and comprises a first set of phase legs coupled to the first set of windings and a second set of phase legs coupled to the second set of windings. A controller is coupled to the inverter module and is configured to achieve a desired power flow between the energy source and the motor by modulating the first set of phase legs using a first carrier signal and modulating the second set of phase legs using a second carrier signal. The second carrier signal is phase-shifted relative to the first carrier signal.

Welchko, Brian A. (Torrance, CA)

2012-02-14T23:59:59.000Z

444

PHIL Inverter Test Report: Analysis of High-Penetration Levels of PV into the Distribution Grid in California, March 12 - March 16, 2012  

SciTech Connect (OSTI)

This report describes power hardware-in-the-loop simulation testing of a 500 kW Satcon photovoltaic inverter, conducted at the Center for Advanced Power Systems at Florida State University from March 12th through March 16th, 2012. Testing was led by a team from the National Renewable Energy Laboratory. The report reviews the results of data captured during the course of testing. The tests were used to demonstrate operation of and gather data from the inverter in a simulated operational environment. Testing demonstrated the ability of the inverter to operate in either a Power Factor Control Mode or a Reactive Power Command Mode, and to respond to real power limits.

Kromer, M.

2013-06-01T23:59:59.000Z

445

PC and monitor night status: Power management enabling and manual turn-off  

SciTech Connect (OSTI)

While office equipment accounts for about 7 percent of commercial building energy use, this reflects considerable energy savings from the use of automatic power management. Most of these savings were gained through the use of low-power modes that meet the criteria of the U.S. EPA's Energy Star program. Despite this success, there are large amounts of additional savings that could be gained if all equipment capable of power management use were enabled and functioning. A considerable portion of equipment is not enabled for power management at all, enabled only partially, or is enabled but prevented from functioning. Additional savings could be gained if more equipment were turned off at night manually. We compiled results from 17 studies from the office equipment literature addressing PCs and monitors. Some factors important for annual energy use, such as power levels, have been documented elsewhere and are not covered. We review methods for estimating office equipment use patterns and energy use, and present findings on night status--power management and manual turn-off rates. In early studies, PC power management was often found to function in 25 percent or less of the Energy Star compliant units (10 percent of all PCs). However, recent assessments have found higher rates, and we estimate that for Energy Star models, 35 percent of PC CPUs and 65 percent of PC monitors are enabled for power management. While the data lack statistical rigor, they can be used to estimate the magnitude of current and potential power management savings, which we did for major types of office equipment. The data also make clear that the topic of enabling rates, and the factors which influence them, deserve greater scrutiny.

Nordman, Bruce; Meier, Alan; Piette, Mary Ann

1998-07-30T23:59:59.000Z

446

REDUCTIONS WITHOUT REGRET: AVOIDING WRONG TURNS, ROACH MOTELS, AND BOX CANYONS  

SciTech Connect (OSTI)

This is the third of three papers (in addition to an introductory summary) aimed at providing a framework for evaluating future reductions or modifications of the U.S. nuclear force, first by considering previous instances in which nuclear-force capabilities were eliminated; second by looking forward into at least the foreseeable future at the features of global and regional deterrence (recognizing that new weapon systems currently projected will have expected lifetimes stretching beyond our ability to predict the future); and third by providing examples of past or possible undesirable outcomes in the shaping of the future nuclear force, as well as some closing thoughts for the future. In this paper, we provide one example each of our judgments on what constitutes a box canyon, a roach motel, and a wrong turn: ? Wrong Turn: The Reliable Replacement Warhead ? Roach Motel: SRAM T vs the B61 ? A Possible Box Canyon: A Low-Yield Version of the W76 SLBM Warhead Recognizing that new nuclear missions or weapons are not demanded by current circumstances ? a development path that yields future capabilities similar to those of today, which are adequate if not always ideal, and a broader national-security strategy that supports nonproliferation and arms control by reducing the role for, and numbers, of nuclear weapons ? we briefly consider alternate, less desirable futures, and their possible effect on the complex problem of regional deterrence. In this regard, we discuss the issues posed by, and possible responses to, three example regional deterrence challenges: in-country defensive use of nuclear weapons by an adversary; reassurance of U.S. allies with limited strategic depth threatened by an emergent nuclear power; and extraterritorial, non-strategic offensive use of nuclear weapons by an adversary in support of limited military objectives against a U.S. ally.

Swegle, J.; Tincher, D.

2013-09-11T23:59:59.000Z

447

Hybrid optics for the visible produced by bulk casting of sol-gel glass using diamond-turned molds  

SciTech Connect (OSTI)

Recent combinations of diffractive and refractive functions in the same optical component allow designers additional opportunities to make systems more compact and enhance performance. This paper describes a research program for fabricating hybrid refractive/diffractive components from diamond-turned molds using the bulk casting of sol-gel silica glass. The authors use the complementary dispersive nature of refractive and diffractive optics to render two-color correction in a single hybrid optical element. Since diamond turning has matured as a deterministic manufacturing technology, techniques previously suitable only in the infrared are now being applied to components used at visible wavelengths. Thus, the marriage of diamond turning and sol-gel processes offers a cost-effective method for producing highly customized and specialized optical components in high quality silica glass. With the sol-gel casting method of replication, diamond-turned mold costs can be shared over many pieces. Diamond turning takes advantage of all of the available degrees of freedom in a single hybrid optical element: aspheric surface to eliminate spherical aberration, kinoform surface for control of primary chromatic aberration, and the flexibility to place the kinoform on non-planar surfaces for maximum design flexibility. The authors discuss the critical issues involved in designing the hybrid element, single point diamond-turning the mold, and fabrication in glass using the sol-gel process.

Bernacki, B.E.; Miller, A.C.; Maxey, L.C.; Cunningham, J.P. [Oak Ridge National Lab., TN (United States); Moreshead, W.V.; Nogues, J.L.R. [Geltech Inc., Alachua, FL (United States)

1995-07-01T23:59:59.000Z

448

A 10-kW SiC Inverter with A Novel Printed Metal Power Module With Integrated Cooling Using Additive Manufacturing  

SciTech Connect (OSTI)

With efforts to reduce the cost, size, and thermal management systems for the power electronics drivetrain in hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs), wide band gap semiconductors including silicon carbide (SiC) have been identified as possibly being a partial solution. This paper focuses on the development of a 10-kW all SiC inverter using a high power density, integrated printed metal power module with integrated cooling using additive manufacturing techniques. This is the first ever heat sink printed for a power electronics application. About 50% of the inverter was built using additive manufacturing techniques.

Chinthavali, Madhu Sudhan [ORNL; Ayers, Curtis William [ORNL; Campbell, Steven L [ORNL; Wiles, Randy H [ORNL; Ozpineci, Burak [ORNL

2014-01-01T23:59:59.000Z

449

Performance of a Dynamically Controlled Inverter in a Photovoltaic System Interconnected with a Secondary Network Distribution System  

SciTech Connect (OSTI)

In 2008, a 300 kW{sub peak} photovoltaic (PV) system was installed on the rooftop of the Colorado Convention Center (CCC). The installation was unique for the electric utility, Xcel Energy, as it had not previously permitted a PV system to be interconnected on a building served by the local secondary network distribution system (network). The PV system was installed with several provisions; one to prevent reverse power flow, another called a dynamically controlled inverter (DCI), that curtails the output of the PV inverters to maintain an amount of load supplied by Xcel Energy at the CCC. The DCI system utilizes current transformers (CTs) to sense power flow to insure that a minimum threshold is maintained from Xcel Energy through the network transformers. The inverters are set to track the load on each of the three phases and curtail power from the PV system when the generated PV system current reaches 95% of the current on any phase. This is achieved by the DCI, which gathers inputs from current transformers measuring the current from the PV array, Xcel, and the spot network load. Preventing reverse power flow is a critical technical requirement for the spot network which serve this part of the CCC. The PV system was designed with the expectation that the DCI system would not curtail the PV system, as the expected minimum load consumption was historically higher than the designed PV system size. However, the DCI system has operated many days during the course of a year, and the performance has been excellent. The DCI system at the CCC was installed as a secondary measure to insure that a minimum level of power flows to the CCC from the Xcel Energy network. While this DCI system was intended for localized control, the system could also reduce output percent if an external smart grid control signal was employed. This paper specifically focuses on the performance of the innovative design at this installation; however, the DCI system could also be used for new s- art grid-enabled distribution systems where renewables power contributions at certain conditions or times may need to be curtailed.

Coddington, M. H.; Kroposki, B. D.; Basso, T.; Berger, D.; Crowell, K.; Hayes, J.

2011-01-01T23:59:59.000Z

450

Local heat transfer distribution in a two-pass trapezoidal channel with a 180 [degree] turn via transient liquid crystal technique  

E-Print Network [OSTI]

cross section. Attention is focused on the effect of the 180' turn on the local heat transfer distributions on the interior surfaces of the various walls at the turn, under turbulent flow conditions. Transient heat transfer experiments, using...

Endley, Saurabh

1996-01-01T23:59:59.000Z

451

Aging Management Guideline for commercial nuclear power plants: Battery chargers, inverters and uninterruptible power supplies. Final report  

SciTech Connect (OSTI)

This Aging Management Guideline (AMG) describes recommended methods for effective detection and mitigation of age-related degradation mechanisms in BWR and PWR commercial nuclear power plant battery chargers, inverters and uninterruptible power supplies important to license renewal. The intent of this AMG is to assist plant maintenance and operations personnel in maximizing the safe, useful life of these components. It also supports the documentation of effective aging management programs required under the License Renewal Rule 10 CFR Part 54. This AMG is presented in a manner that allows personnel responsible for performance analysis and maintenance to compare their plant-specific aging mechanisms (expected or already, experienced) and aging management program activities to the more generic results and recommendations presented herein.

Berg, R.; Stroinski, M.; Giachetti, R. [Multiple Dynamics Corp., Southfield, MI (United States)

1994-02-01T23:59:59.000Z

452

In-Plant Reliability Data base for nuclear plant components. Interim report: diesel generators, batteries, chargers and inverters  

SciTech Connect (OSTI)

The objective of the In-Plant Reliability Data (IPRD) program is to develop a comprehensive, component-specific reliability data base for probabilistic risk assessment and for other statistical analyses relevant to component reliability evaluations. This document is the product of a pilot study that was undertaken to demonstrate the methodology and feasibility of applying IPRDS techniques to develop and analyze the reliability characteristics of key electrical components in five nuclear power plants. These electrical components include diesel generators, batteries, battery chargers and inverters. The sources used to develop the data base and produce the component failure rates and mean repair times were the plant equipment lists, plant drawings, maintenance work requests, Final Safety Analysis Reports (FSARs), and interviews with plant personnel. The data spanned approximately 33 reactor-years of commercial operation.

Kahl, W.K.; Borkowski, R.J.

1985-01-01T23:59:59.000Z

453

Dynamic performance of static and synchronous compensators at an HVDC inverter bus in a very weak AC system  

SciTech Connect (OSTI)

This paper discusses the performance of dynamic voltage control devices at the inverters of very weak ac systems. The types of compensation considered are: (a) static var compensator (SVC), (b) synchronous compensator (SC), (c) a mix of the two and (d) fixed capacitors. Although the primary purpose of these compensators is to control voltage at the ac bus, their dynamic performance during system disturbances is a very important factor. The investigation includes the behavior of the various voltage control options under ac and dc disturbances. The paper shows that the SVC has the fastest response for load rejection type of overvoltages, but can cause serious problems with recovery during undervoltages caused by single phase faults. The CIGRE benchmark model for HVdc control studies has been modified and used in this study. In particular the effect of local load has been included.

Nayak, O.B.; Gole, A.M. (Univ. of Manitoba, Winnipeg (Canada)); Chapman, D.G.; Davies, J.B. (Manitoba Hydro, Winnipeg (Canada))

1994-08-01T23:59:59.000Z

454

PV String to 3-Phase Inverter with Highest Voltage Capabilities, Highest Efficiency and 25 Year Lifetime: Final Technical Report, November 7, 2011 - November 6, 2012  

SciTech Connect (OSTI)

Final report for Renewable Power Conversion. The overall objective of this project was to develop a prototype PV inverter which enables a new utility-scale PV system approach where the cost, performance, reliability and safety benefits of this new approach have the potential to make all others obsolete.

West, R.

2012-12-01T23:59:59.000Z

455

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 57, NO. 8, AUGUST 2010 2761 Cascaded Nine-Level Inverter for Hybrid-Series  

E-Print Network [OSTI]

-Level Inverter for Hybrid-Series Active Power Filter, Using Industrial Controller Alexander Varschavsky, Juan of this new application. Index Terms--Active filters, harmonic distortion, multilevel systems, power quality nine-level active power filter (APF). The controller is now able to make all required tasks

Catholic University of Chile (Universidad Católica de Chile)

456

Abstract -In this paper, new formulations for the energy dissipation of lossy transmission lines driven by CMOS inverters are provided. These  

E-Print Network [OSTI]

inverter inputs. To accomplish this task, a new stable circuit that is capable of modeling the transmission enabling a host of new and powerful applications. Recent studies on the effects caused by the nanometerAbstract - In this paper, new formulations for the energy dissipation of lossy transmission lines

Heydari, Payam

457

Abstract--A method for fault detection and isolation is proposed and applied to inverter faults in multi-phase drives. An  

E-Print Network [OSTI]

energy source, a five- leg inverter and a five-phase star-connected PMSM. It has to be noticed that all-magnet synchronous machine (PMSM) drive. The faults under consideration are: open-phase faults and open-switch faults

Boyer, Edmond

458

FOREGROUND PREDICTIONS FOR THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM FROM MEASUREMENTS OF FAINT INVERTED RADIO SOURCES AT 5 GHz  

SciTech Connect (OSTI)

We present measurements of a population of matched radio sources at 1.4 and 5 GHz down to a flux limit of 1.5 mJy in 7 deg{sup 2} of the NOAO Deep Field South. We find a significant fraction of sources with inverted spectral indices that all have 1.4 GHz fluxes less than 10 mJy and are therefore too faint to have been detected and included in previous radio source count models that are matched at multiple frequencies. Combined with the matched source population at 1.4 and 5 GHz in 1 deg{sup -2} in the ATESP survey, we update models for the 5 GHz differential number counts and distributions of spectral indices in 5 GHz flux bins that can be used to estimate the unresolved point source contribution to the cosmic microwave background temperature anisotropies. We find a shallower logarithmic slope in the 5 GHz differential counts than in previously published models for fluxes {approx}< 100 mJy as well as larger fractions of inverted spectral indices at these fluxes. Because the Planck flux limit for resolved sources is larger than 100 mJy in all channels, our modified number counts yield at most a 10% change in the predicted Poisson contribution to the Planck temperature power spectrum. For a flux cut of 5 mJy with the South Pole Telescope and a flux cut of 20 mJy with the Atacama Cosmology Telescope, we predict a {approx}30% and {approx}10% increase, respectively, in the radio source Poisson power in the lowest frequency channels of each experiment relative to that predicted by previous models.

Schneider, Michael D. [Lawrence Livermore National Laboratory, P.O. Box 808 L-210, Livermore, CA 94551 (United States); Becker, Robert H. [Department of Physics, University of California, One Shields Avenue, Davis, CA 08991 (United States); De Vries, Willem [Lawrence Livermore National Laboratory, P.O. Box 808 L-211, Livermore, CA 94551 (United States); White, Richard L., E-mail: schneider42@llnl.gov [Space Telescope Science Institute, Baltimore, MD 21218 (United States)

2012-05-10T23:59:59.000Z

459

Turning point temperature and competition between relativistic and ponderomotive effects in self-focusing of laser beam in plasma  

SciTech Connect (OSTI)

The propagation characters of Gaussian laser beam in collisionless plasma are investigated by considering the ponderomotive and relativistic nonlinearities. The second-order differential equation of dimensionless beam width parameter is solved numerically, taking into account the effect of electron temperature. The results show that the ponderomotive force does not facilitate the relativistic self-focusing in all intensity ranges. In fact, there exists a certain intensity value that, if below this value, the ponderomotive nonlinearity can contribute to the relativistic self-focusing, or obstruct it, if above. It is also indicated that there is a temperature interval in which self-focusing can occur, while the beam diverges outside of this region. In addition, the results represent the existence of a turning point temperature in the mentioned interval that the self-focusing has the strongest power. The value of the turning point is dependent on laser intensity in which higher intensities result in higher turning point.

Bokaei, B.; Niknam, A. R. [Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Tehran (Iran, Islamic Republic of)] [Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Tehran (Iran, Islamic Republic of); Jafari Milani, M. R. [Plasma Physics Research School, Tehran (Iran, Islamic Republic of)] [Plasma Physics Research School, Tehran (Iran, Islamic Republic of)

2013-10-15T23:59:59.000Z

460

Probing the outer edge of an accretion disk: A Her X-1 turn-on observed with RXTE  

E-Print Network [OSTI]

We present the analysis of Rossi X-ray Timing Explorer (RXTE) observations of the turn-on phase of a 35 day cycle of the X-ray binary Her X-1. During the early phases of the turn-on, the energy spectrum is composed of X-rays scattered into the line of sight plus heavily absorbed X-rays. The energy spectra in the 3-17 keV range can be described by a partial covering model, where one of the components is influenced by photoelectric absorption and Thomson scattering in cold material plus an iron emission line at 6.5 keV. In this paper we show the evolution of spectral parameters as well as the evolution of the pulse profile during the turn-on. We describe this evolution using Monte Carlo simulations which self-consistently describe the evolution of the X-ray pulse profile and of the energy spectrum.

M. Kuster; J. Wilms; R. Staubert; W. A. Heindl; R. E. Rothschild; N. I. Shakura; K. A. Postnov

2005-07-08T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

The Earth Institute, Columbia University12 annual donor report 2010 13 at the turn of the century, world leaders  

E-Print Network [OSTI]

The Earth Institute, Columbia University12 annual donor report 2010 13 at the turn of the century-General Ban Ki-moon at the Earth Institute's State of the Planet Conference in March 2010. "They of humanity are at stake." The Millennium Villages project, a partnership between the Earth Institute

462

Wind turbines convert the kinetic energy in moving air into rotational energy, which in turn is converted  

E-Print Network [OSTI]

Wind turbines convert the kinetic energy in moving air into rotational energy, which in turn of electricity wind can make varies constantly. Sometimes a wind turbine will make no power at all is an indicator of how much energy a particular wind turbine makes in a particular place. Continued on page 2 #12

Massachusetts at Amherst, University of

463

Fruit Flies Modulate Passive Wing Pitching to Generate In-Flight Turns Attila J. Bergou,1,* Leif Ristroph,1  

E-Print Network [OSTI]

Fruit Flies Modulate Passive Wing Pitching to Generate In-Flight Turns Attila J. Bergou,1,* Leif of their wing motions. Here, we measure the free-flight kinematics of fruit flies and determine how arise and what control variables govern them remains a challenge. Here, we analyze the torques fruit

Guckenheimer, John

464

Lubrication and Tool-wear in the Turning of Hard Powdered Metals By: Edward Chow and Anastasia Linuwih  

E-Print Network [OSTI]

Lubrication and Tool-wear in the Turning of Hard Powdered Metals By: Edward Chow and Anastasia Linuwih Background A current target and need in the auto industry is to achieve improved tool life in machining powered metal valve seats for an engine block. The tools required are specialized and expensive

Demirel, Melik C.

465

Wind-Power Development in Germany and the U.S.: Multiple Streams, Advocacy Coalitions, and Turning Points  

E-Print Network [OSTI]

Wind-Power Development in Germany and the U.S.: Multiple Streams, Advocacy Coalitions, and Turning). Of the various forms of renewable energy, wind-generated electricity has a unique set of advantages, which make especially large. Wind power produces relatively low levels of environmental damage over its life cycle (like

Qiu, Weigang

466

WTERT (Greece and U.S.) PARTICIPATION IN ISWA-APESB 2009 WORLD CONGRESS:"Turning Waste into  

E-Print Network [OSTI]

Management 3. Waste To Energy 4. Waste&Climate Change 5. IberoAmerican Symposium Regarding Waste to Energy the conclusions were that, in line with the new EU directive of 2008/98, Waste to Energy is getting higherWTERT (Greece and U.S.) PARTICIPATION IN ISWA- APESB 2009 WORLD CONGRESS:"Turning Waste into Ideas

467

VII Pillars Of Productivity Seven practices characterize highly productive companies turning them into 'digital organizations.' IT is the catalyst,  

E-Print Network [OSTI]

VII Pillars Of Productivity Seven practices characterize highly productive companies turning them's productivity growth, more than any other economic statistic, that determines our living standards. If productivity grows at 1% per year, living standards will double every 70 years. If productivity grows at 3% per

468

On The Use of Eddy Current Brakes as Tunable, Fast Turn-On Viscous Dampers For Haptic Rendering  

E-Print Network [OSTI]

On The Use of Eddy Current Brakes as Tunable, Fast Turn-On Viscous Dampers For Haptic Rendering, linear dampers for haptic rendering using a prototype haptic device outfitted with eddy current brakes discuss the results from haptic experiments for rendering viscosity, virtual walls and virtual friction

Hayward, Vincent

469

Estimated Savings from Turning Off Unnecessary Lights at the Langford Architecture Center During the 1996 Christmas Holidays  

E-Print Network [OSTI]

lights been left on, the building would have consumed 100 kW more electricity every hour. The total electricity savings was about 31,200 kWh over 13 days, which is equivalent to a total cost saving of $936.00. If the College continues to turn off...

Soebarto, V. I.; Haberl, J. S.; Degelman, L. O.

1997-01-01T23:59:59.000Z

470

Molecular-beam epitaxial growth and characterization of inverted, pulse-doped AlGaAs/InGaAs transistor structures  

SciTech Connect (OSTI)

Inverted, pulse-doped AlGaAs/InGaAs pseudomorphic high electron mobility transistor structures were grown by molecular-beam epitaxy. Growth conditions were optimized to improve the quality of the selectively doped AlGaAs layer and to minimize dopant diffusion into the InGaAs channel. The sheet densities and mobilities of the inverted structure were found to be essentially equivalent to those obtained with the normal structure. Shubnikov-de Haas measurements exhibited strong oscillations in the magnetoresistance and plateaus in the Hall resistance. Four optical transitions from the lowest bound electron and hole quantum well states were observed in room-temperature photoluminescence spectra. 15 refs., 4 figs.

Hoke, W.E.; Lyman, P.S.; Brierley, S.K. [Raytheon Research Division, Lexington, MA (United States)] [and others] [Raytheon Research Division, Lexington, MA (United States); and others

1993-05-01T23:59:59.000Z

471

11196. Proposed by Mohammad Hossein Mehrabi, Iran University of Science and Technology, Tehran, Iran. Let A and B be real n n matrices. Show that if AB -BA is invertible and A2  

E-Print Network [OSTI]

11196. Proposed by Mohammad Hossein Mehrabi, Iran University of Science and Technology, Tehran, Iran. Let A and B be real n ? n matrices. Show that if AB - BA is invertible and A2 + B2 = 3(AB - BA

Heckman, Christopher Carl

472

Extending the Constant Power Speed Range of the Brushless DC Motor through Dual Mode Inverter Control -- Part I: Theory and Simulation  

SciTech Connect (OSTI)

An inverter topology and control scheme has been developed that can drive low-inductance, surface-mounted permanent magnet motors over the wide constant power speed range required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC) [1]. The DMIC can drive either the Permanent Magnet Synchronous Machine (PMSM) with sinusoidal back emf, or the brushless dc machine (BDCM) with trapezoidal emf in the motoring and regenerative braking modes. In this paper we concentrate on the BDCM under high-speed motoring conditions. Simulation results show that if all motor and inverter loss mechanisms are neglected, the constant power speed range of the DMIC is infinite. The simulation results are supported by closed form expressions for peak and rms motor current and average power derived from analytical solution to the differential equations governing the DMIC/BDCM drive for the lossless case. The analytical solution shows that the range of motor inductance that can be accommodated by the DMIC is more than an order of magnitude such that the DMIC is compatible with both low- and high-inductance BDCMs. Finally, method is given for integrating the classical hysteresis band current control, used for motor control below base speed, with the phase advance of DMIC that is applied above base speed. The power versus speed performance of the DMIC is then simulated across the entire speed range.

Lawler, J.S.

2001-10-29T23:59:59.000Z

473

Solar Energy Grid Integration Systems. Final Report of the Princeton Power Systems Development of the 100kW Demand Response Inverter.  

SciTech Connect (OSTI)

Initiated in 2008, the Solar Energy Grid Integration (SEGIS) program is a partnership involving the U.S. Department of Energy, Sandia National Laboratories, electric utilities, academic institutions and the private sector. Recognizing the need to diversify the nation's energy portfolio, the SEGIS effort focuses on specific technologies needed to facilitate the integration of large-scale solar power generation into the nation's power grid Sandia National Laboratories (SNL) awarded a contract to Princeton Power Systems, Inc., (PPS) to develop a 100kW Advanced AC-link SEGIS inverter prototype under the Department of Energy Solar Energy Technologies Program for near-term commercial applications. This SEGIS initiative emphasizes the development of advanced inverters, controllers, communications and other balance-of-system components for photovoltaic (PV) distributed power applications. The SEGIS Stage 3 Contract was awarded to PPS on July 28, 2010. PPS developed and implemented a Demand Response Inverter (DRI) during this three-stage program. PPS prepared a 'Site Demonstration Conference' that was held on September 28, 2011, to showcase the cumulative advancements. This demo of the commercial product will be followed by Underwriters Laboratories, Inc., certification by the fourth quarter of 2011, and simultaneously the customer launch and commercial production sometime in late 2011 or early 2012. This final report provides an overview of all three stages and a full-length reporting of activities and accomplishments in Stage 3.

Bower, Ward Isaac; Heavener, Paul (Princeton Power Systems, Inc., Princeton, NJ); Sena-Henderson, Lisa; Hammell, Darren (Princeton Power Systems, Inc., Princeton, NJ); Holveck, Mark (Princeton Power Systems, Inc., Princeton, NJ); David, Carolyn; Akhil, Abbas Ali; Gonzalez, Sigifredo

2012-01-01T23:59:59.000Z

474

A Her X-1 Turn-On: Using the pulse profile to probe the outer edge of an accretion disk  

E-Print Network [OSTI]

The X-ray binary pulsar Her X-1 shows a wide variety of long and short term variabilities in the X-ray light curve. The 35 d variability of the source is interpreted as the influence of a warped, inclined, and twisted accretion disk periodically covering the line of sight to the central neutron star. In 1997 September we observed the ``turn-on'' of a 35 d cycle with the Rossi X-ray Timing Explorer (RXTE). Spectral analysis reveals that during early phases of the turn-on the overall spectrum is composed of X-rays scattered into the line of sight plus heavily absorbed X-rays. This interpretation is consistent with the variation of the pulse profile observed at the same time. The overall shape of the pulse profile is not changing, but towards earlier phases of the turn-on the pulse signature is steadily ``washed out''. This behavior can be understood as an influence of scattering and absorption due to the presence of the accretion disk rim. Using a Monte Carlo code we simulate the influence of both processes on a time variable, beamed emission characteristic, similar to the pulse profile of Her X-1. By comparing the results of the simulation with the observed profiles we determine the amount of scattered radiation, absorbed radiation, and the size of the scattering region.

M. Kuster; J. Wilms; R. Staubert; P. Risse; W. A. Heindl; R. Rothschild; N. I. Shakura; K. A. Postnov

2002-03-13T23:59:59.000Z

475

Structural analysis of an Inverted half-graben: Implications for fracture distribution and reservior quality in Point Arguello oil field  

SciTech Connect (OSTI)

Analysis of 3-D seismic and well data suggests that the present-day Point Arguello anticline contains part of a northward-elongate Miocene-Pliocene half graben that was compressionally inverted to a northwest-trending double-plunging anticline during the Pliocene-Pleistocene. Upper Sisquoc and Foxen sedimentation postdated the normal faulting event so the shape of the fold at these stratigraphic levels is relatively simple, being the product of only the late, compressional event. Refolding of the earlier rift structure resulted, however, in a relatively complicted saddle-shaped anticline at lower Sisquoc and Monterey reservoir levels. Nevertheless, we observe that several distinct homolinal-dipping panels of rock (kink bands) define the fold shape at reservoir level. We perform a structural analysis using fault-related fold theory and the new technique of Axial Surface Mapping to map kink bands at Monterey reservoir level. Although both folding events produced kink bands, open permeable fractures are associated with the late compression, whereas filled, crenulated fractures likely formed earlier by compaction of syntextensional sediments. Therefore, we predict a greater fracture density within kink bands formed during the late folding event. We also predict better reservoir quality within kink bands within the plunging ends of the structure which show structural thinning and more numerous small faults in seismic profiles than in non-thinned fold limbs. Qualitative predictions of fracture density and reservoir quality based on the fold history and geometry of individual kink bands compare favorably with fracture measurements in core and drill-stem test results.

Genovese, P.G.; Suppe, J. (Princeton Univ., NJ (United States))

1994-04-01T23:59:59.000Z

476

Upon leaving the airport on Airport Road continue 1.1 miles. Turn right on Garfield Ave. (US Hwy 14 truck route) and continue 1.0 mile.  

E-Print Network [OSTI]

until Trailrace Rd. Turn left to Powerhouse Rd. Turn left into the Corps of Engineers complexAve Capitol AveSioux Ave Dakota Ave Tailrace Rd 83 1804 1804 PowerhouseR d 1806 34 14 1806 34 14 83 14 BYP 14 28563 Powerhouse Road Pierre Field Office 28563 Powerhouse Road #12;

477

High Temperature Inverter  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

478

Next Generation Inverter  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

479

Inverted Attic Bulkhead for HVAC Ductwork, Roseville, California (Fact Sheet), Building America Case Study: Whole-House Solutions for Existing Homes, Building Technologies Office (BTO)  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOE VehicleStationary Fuel EnerNOC,FEDERAL ENERGYJimInverted

480

ANKLE IMPEDANCE AND ANKLE ANGLES DURING STEP TURN AND STRAIGHT WALK: IMPLICATIONS FOR THE DESIGN OF A STEERABLE ANKLE-FOOT PROSTHETIC ROBOT.  

E-Print Network [OSTI]

?? During locomotion, turning is a common and recurring event which is largely neglected in the current state-of-the-art ankle-foot prostheses, forcing amputees to use different (more)

Ficanha, Evandro M.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turning converter-see inverter" 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

High speed measurements of neutral beam turn-on and impact of beam modulation on measurements of ion density  

SciTech Connect (OSTI)

Modulation of neutral beams on tokamaks is performed routinely, enabling background rejection for active spectroscopic diagnostics, and control of injected power and torque. We find that there exists an anomalous initial transient in the beam neutrals delivered to the tokamak that is not accounted for by the accelerator voltage and power supply current. Measurements of the charge-exchange and beam photoemission on the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] at high speed (200 ?s) reveal that the energy of the beam neutrals is constant, but the density of beam neutrals displays dramatic variation in the first 23 ms following beam turn-on. The impact of this beam density variation on inferred ion densities and impurity transport is presented, with suggested means to correct for the anomalous transient.

Grierson, B. A., E-mail: bgriers@pppl.gov; Grisham, L. [Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States); Burrell, K. H.; Crowley, B.; Scoville, J. T. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)

2014-10-15T23:59:59.000Z

482

The Turn-on of LCLS: the X-Ray Free Electron Laser at SLAC ( Keynote - 2011 JGI User Meeting)  

SciTech Connect (OSTI)

The U.S. Department of Energy Joint Genome Institute (JGI) invited scientists interested in the application of genomics to bioenergy and environmental issues, as well as all current and prospective users and collaborators, to attend the annual DOE JGI Genomics of Energy & Environment Meeting held March 22-24, 2011 in Walnut Creek, Calif. The emphasis of this meeting was on the genomics of renewable energy strategies, carbon cycling, environmental gene discovery, and engineering of fuel-producing organisms. The meeting features presentations by leading scientists advancing these topics. SLAC National Laboratory Director Persis Drell gives a keynote talk on "The Turn-on of LCLS: the X-Ray Free-Electron Laser at SLAC" at the 6th Genomics of Energy & Environment Meeting on March 22, 2011

Drell, Persis [SLAC Director] [SLAC Director

2011-03-22T23:59:59.000Z

483

The Turn-on of LCLS: the X-Ray Free Electron Laser at SLAC ( Keynote - 2011 JGI User Meeting)  

ScienceCinema (OSTI)

The U.S. Department of Energy Joint Genome Institute (JGI) invited scientists interested in the application of genomics to bioenergy and environmental issues, as well as all current and prospective users and collaborators, to attend the annual DOE JGI Genomics of Energy & Environment Meeting held March 22-24, 2011 in Walnut Creek, Calif. The emphasis of this meeting was on the genomics of renewable energy strategies, carbon cycling, environmental gene discovery, and engineering of fuel-producing organisms. The meeting features presentations by leading scientists advancing these topics. SLAC National Laboratory Director Persis Drell gives a keynote talk on "The Turn-on of LCLS: the X-Ray Free-Electron Laser at SLAC" at the 6th Genomics of Energy & Environment Meeting on March 22, 2011

Drell, Persis [SLAC Director

2011-06-08T23:59:59.000Z

484

CEMs turn monitoring giant  

SciTech Connect (OSTI)

Crucial to complying with environmental regulations is selecting appropriate pollution control equipment to capture or destroy regulated pollutants. But just as important is selecting a continuous emissions monitoring system (CEM). CEMs play a dual role in an overall compliance strategy. On one hand, they identify the type and quantity of emissions at a source as a first step for determining which regulatory requirements and control technologies are applicable. They also provide ongoing emissions data to demonstrate compliance with air and other environmental regulations. Facilities are required to monitor their processes with CEMs, or a comparable technology, under several titles of the Clean Air Act Amendments of 1990. CEMs meet regulatory requirements if they include a SO[sub 2] concentration monitor, nitrogen oxides (NO[sub x]) concentration monitor, volumetric flow monitor, opacity monitor, diluent gas monitor and data acquisition and handling system. The entire system and each subsystem has to be installed and certified before it can be used for compliance. A written quality assurance/quality control (QA/QC) plan for the CEMs must accompany the permit application. The acid rain rules also impose performance standards and frequent calibration checks to ensure the integrity of CEMs data.

White, J.R. (KVB/Analect, Irvine, CA (United States))

1993-08-01T23:59:59.000Z

485

Turning on LAMP  

SciTech Connect (OSTI)

Christoph Bostedt, a senior staff scientist at SLAC's Linac Coherent Light Source X-ray laser, provides a sneak peek of a powerful new instrument, called LAMP, that is now available for experiments that probe the atomic and molecular realm. LAMP replaces and updates the first instrument at LCLS, dubbed CAMP, which will be installed at an X-ray laser in Germany.

Bostedt, Christoph

2014-06-30T23:59:59.000Z

486

The Wheel Turns  

E-Print Network [OSTI]

in the street. IIJim, corne herso I wBnt to telk to yoU.'I Kirk cems over and knelt 8t Spock's feet, resting hL.;) erms on th(:) Vul can IS knee-3 9 end looking up anxiously into his feee. "What is it, Spack? Have I done something '"rang?" "Of course not...

Piacentini, Valerie

1977-01-01T23:59:59.000Z

487

Turn Hoang Nguyen  

Office of Scientific and Technical Information (OSTI)

fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Organic Chemistry Program of Study Committee: George A. Kraus (Major Professor) Richard C. Larock...

488

Turning on LAMP  

ScienceCinema (OSTI)

Christoph Bostedt, a senior staff scientist at SLAC's Linac Coherent Light Source X-ray laser, provides a sneak peek of a powerful new instrument, called LAMP, that is now available for experiments that probe the atomic and molecular realm. LAMP replaces and updates the first instrument at LCLS, dubbed CAMP, which will be installed at an X-ray laser in Germany.

Bostedt, Christoph

2014-07-16T23:59:59.000Z

489

Advanced Power Electronic Interfaces for Distributed Energy Systems, Part 2: Modeling, Development, and Experimental Evaluation of Advanced Control Functions for Single-Phase Utility-Connected Inverter  

SciTech Connect (OSTI)

Integrating renewable energy and distributed generations into the Smart Grid architecture requires power electronic (PE) for energy conversion. The key to reaching successful Smart Grid implementation is to develop interoperable, intelligent, and advanced PE technology that improves and accelerates the use of distributed energy resource systems. This report describes the simulation, design, and testing of a single-phase DC-to-AC inverter developed to operate in both islanded and utility-connected mode. It provides results on both the simulations and the experiments conducted, demonstrating the ability of the inverter to provide advanced control functions such as power flow and VAR/voltage regulation. This report also analyzes two different techniques used for digital signal processor (DSP) code generation. Initially, the DSP code was written in C programming language using Texas Instrument's Code Composer Studio. In a later stage of the research, the Simulink DSP toolbox was used to self-generate code for the DSP. The successful tests using Simulink self-generated DSP codes show promise for fast prototyping of PE controls.

Chakraborty, S.; Kroposki, B.; Kramer, W.

2008-11-01T23:59:59.000Z

490

The effects of compressor speed and electronic expansion valve opening on the optimum design of inverter heat pump at various heating loads  

SciTech Connect (OSTI)

The experiments to design the optimum operation point of an inverter heat pump were performed by varying compressor speed and expansion valve opening for various heating loads. At the indoor temperatures of {minus}5 {approximately} 15C and outdoor temperatures of {minus}10 {approximately} 25 C, the compressor driving frequencies were varied 10 {approximately} 120 Hz and 80 {approximately} 200 pulse for the expansion valve opening while the speed of the indoor and outdoor fans were fixed. From the results of this study, the optimum combination of compressor driving frequency and expansion valve opening were found to exist if indoor and outdoor temperatures are settled though the operation point is changed by the preferable factor among capacity, comfort and power saving.

Hwang, Y.; Kim, Y.; Park, J.; Kim, C.

1999-07-01T23:59:59.000Z

491

Inverted GaInP/(In)GaAs/InGaAs Triple-Junction Solar Cells with Low-Stress Metamorphic Bottom Junctions: Preprint  

SciTech Connect (OSTI)

We demonstrate high efficiency performance in two ultra-thin, Ge-free III-V semiconductor triple-junction solar cell device designs grown in an inverted configuration. Low-stress metamorphic junctions were engineered to achieve excellent photovoltaic performance with less than 3 x 106 cm-2 threading dislocations. The first design with band gaps of 1.83/1.40/1.00 eV, containing a single metamorphic junction, achieved 33.8% and 39.2% efficiencies under the standard one-sun global spectrum and concentrated direct spectrum at 131 suns, respectively. The second design with band gaps of 1.83/1.34/0.89 eV, containing two metamorphic junctions achieved 33.2% and 40.1% efficiencies under the standard one-sun global spectrum and concentrated direct spectrum at 143 suns, respectively.

Geisz, J. F.; Kurtz, S. R.; Wanlass, M. W.; Ward, J. S.; Duda, A.; Friedman, D. J.; Olson, J. M.; McMahon, W. E.; Moriarty, T. E.; Kiehl, J. T.; Romero, M. J.; Norman, A. G.; Jones, K. M.

2008-05-01T23:59:59.000Z

492

Please cite this article in press as: Malen, J.A., et al., Thermal hydraulic design of a hydride-fueled inverted PWR core. Nucl. Eng. Des. (2009), doi:10.1016/j.nucengdes.2009.02.026  

E-Print Network [OSTI]

Please cite this article in press as: Malen, J.A., et al., Thermal hydraulic design of a hydride hydraulic design of a hydride-fueled inverted PWR core J.A. Malena, , N.E. Todreasb , P. Hejzlarb , P and its thermal hydraulic performance is compared to that of a standard rod bundle core design also fueled

Malen, Jonathan A.

2009-01-01T23:59:59.000Z

493

Poor and In Poor Health Bottom Line: In the United States, discussion about how to improve health often turns to either access to care or health  

E-Print Network [OSTI]

often turns to either access to care or health behaviors like smoking or diet. These things matter children not re- ceiving any health care in a given year is twice that of higher-income children. Another and changes rapidly during the first few years of life. U.S. Health Care The U.S. health care system includes

Liblit, Ben

494

DES 192 INTERNSHIP DOCUMENTATION INSTRUCTIONS Paperwork must be completed, signed, and turned in to the Advising Office in order to obtain  

E-Print Network [OSTI]

DES 192 INTERNSHIP DOCUMENTATION INSTRUCTIONS Paperwork must be completed, signed, and turned of the quarter) OBJECTIVES OF DESIGN INTERNSHIP CREDIT: Encourage students to obtain applied learning experience's personal and educational goals. To obtain academic credit (units) for an internship, you must: · Have

Hernes, Peter J.

495

Investigating the plasma parameters of an Ar/O{sub 2} discharge during the sputtering of Al targets in an inverted cylindrical magnetron  

SciTech Connect (OSTI)

The plasma parameters and reaction kinetics in an inverted cylindrical magnetron chamber have been studied with an energy resolved mass spectrometer during the sputtering of aluminum targets in an Ar/O{sub 2} discharge. Mixtures of argon and oxygen were studied as a function of oxygen percentage (0%90%) in the discharge. The plasma was powered at 4?kW and 40?kHz at a process pressure of 5 mTorr. Al{sup +}, Al, AlO, AlO{sup +}, O{sub 2}{sup +}, O{sup +}, Al{sub 2}O{sup +}, and Ar{sup +} were among the species detected in the discharge. The deposition rate of the deposited thin film decreased with increasing oxygen percentage in the discharge and results indicated that the pure gamma-alumina was obtained when the percentage of oxygen was approximately 70%. The linear plot of energy distributions of the positively charged film forming species changed from a single peak to a bimodal distribution as the percentage of oxygen exceeds 65%. In a log plot, however, the distributions showed multiple peaks ranging from 2?eV to 78?eV. Fluctuations of about 1?eV in peak energies were observed.

Mensah, Samuel L., E-mail: slmensah@memphis.edu, E-mail: scrr004@gmail.com [University of Memphis, Memphis, Tennessee 38152 (United States); Gordon, Matt [University of Denver, Denver, Colorado 80208 (United States); Naseem, Hameed H. [University of Arkansas, Fayetteville, Arkansas 72701 (United States)

2014-09-15T23:59:59.000Z

496

The Revenge of the Market on the Rentiers: Why neo-liberal Reports of the end of history turned out to be premature  

E-Print Network [OSTI]

government transfers (such as social security, unemployment benefits, welfare payments, etc.), and before individual income taxes and employees' payroll taxes (but after employers payroll taxes and corporate income taxes). 24 In turn, including capital... ; the value of private and government debt securities from US$9 to US$80 trillion; and bank assets from US$11 to US$96 trillion (on the latter number, see notes below Figure 1; all figures in US$ at 2007 value). 3 FIGURE 1 ? (a...

Palma, J G

497

Long-term developments in Her X-1: Correlation between the histories of the 35 day turn-on cycle and the 1.24 sec pulse period  

E-Print Network [OSTI]

We have studied the long-term (1971-2005) behaviour of the 1.24 sec pulse period and the 35 day precession period of Her X-1 and show that both periods vary in a highly correlated way (see also Staubert et al. 1997 and 2000). When the spin-up rate decreases, the 35 day turn-on period shortens.This correlation is most evident on long time scales (~2000 days),e.g.around four extended spin-down episodes, but also on shorter time scales (a few 100 days) on which quasi-periodic variations are apparent. We argue that the likely common cause is variations of the mass accretion rate onto the neutron star.The data since 1991 allow a continuous sampling and indicate a lag between the turn-on behaviour and the spin behaviour, in the sense that changes are first seen in the spin, about one cycle later in the turn-on. Both the coronal wind model (Schandl & Meyer 1994) as well as the stream-disk model (Shakura et al.999) predict this kind of behaviour.

R. Staubert; S. Schandl; D. Klochkov; J Wilms; K. Postnov; N. Shakura

2007-02-20T23:59:59.000Z

498

Anomalies and Invertible Field Theories  

E-Print Network [OSTI]

We give a modern geometric viewpoint on anomalies in quantum field theory and illustrate it in a 1-dimensional theory: supersymmetric quantum mechanics. This is background for the resolution of worldsheet anomalies in orientifold superstring theory.

Daniel S. Freed

2014-06-21T23:59:59.000Z

499

Why is the metric invertible?  

E-Print Network [OSTI]

We raise, and provide an (unsatisfactory) answer to, the title's question: why, unlike all other fields, does the gravitational "metric" variable not have zero vacuum? After formulating, without begging it, we exhibit additions to the conventional action that express existence of the inverse through a field equation.

S. Deser

2006-03-30T23:59:59.000Z

500

Deflation Methods in Fermion Inverters  

E-Print Network [OSTI]

I will review recent developments in matrix deflation methods, by Ronald Morgan/Walter Wilcox, Andreas Stathopoulos/Konstantinos Orginos, and Martin L\\"uscher, with application to lattice QCD fermion inversion. I will begin with a short review of deflation-related work in the field. The Morgan/Wilcox algorithms using GMRES and BiCGStab for deflation will be described. Typical results for quenched (Wilson and twisted mass) and dynamical configurations (CP-PACS and ETMC) will be displayed and discussed. I will outline how inclusion of multiple right-hand sides and multiple shifts can be accommodated within versions of these methods. I will also review deflation methods based on Conjugate Gradient introduced by Stathopoulos and Orginos for hermitian systems with multiple right-hand sides as well as L\\"uscher's non-hermitian domain decomposition algorithm using Generalized Conjugate Residual.}

Walter Wilcox

2007-10-23T23:59:59.000Z