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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Novel passive lossless turn-on snubber for voltage source inverters  

SciTech Connect (OSTI)

A novel passive lossless turn-on snubber with a soft clamped turn-off snubber circuit for voltage source inverters is proposed. The energy trapped in the snubber is recovered into the dc supply and load without any active devices, associated control circuitry, or resistors. The overshoot voltage on the switches is clamped, and the peak switch current is low, making this snubber suitable for use in high-power insulated gate bipolar transistor (IGBT) inverters.

He, X.; Qian, Z.M. [Zhejiang Univ., Hangzhou (China). Dept. of Electrical Engineering; Finney, S.J.; Williams, B.W. [Heriot-Watt Univ., Edinburgh (United Kingdom). Dept. of Computing and Electrical Engineering

1997-01-01T23:59:59.000Z

2

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

3

invert(ed) (oil) emulsion (drilling) mud  

Science Journals Connector (OSTI)

invert(ed) (oil) emulsion (drilling) mud, water-in-oil (drilling) mud ? Wasser-in-l-(Bohr)...m, (f)

2014-08-01T23:59:59.000Z

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

Definition: Inverter | Open Energy Information  

Open Energy Info (EERE)

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

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

Sandia National Laboratories: demand response inverter  

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

demand response inverter ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities,...

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

The Invertible Matrix Theorem I  

E-Print Network [OSTI]

Feb 16, 2007 ... (a) Apply Corollary 2.6.12 to conclude that L2 and. U1 are invertible ... For Problems 3133, use some form of technology to de- termine the LU .... for the (

PRETEX (Halifax NS) #1 1054 1999 Mar 05 10:59:16

2010-01-20T23:59:59.000Z

19

Turn Hoang Nguyen  

Office of Scientific and Technical Information (OSTI)

Synthesis of polycyclic natural products Synthesis of polycyclic natural products by Turn Hoang Nguyen A dissertation submitted to the graduate faculty in partial 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 Valerie V. Sheares-Ashby Jacob W. Petrich Earl G. Hammond Iowa State University Arnes, Iowa 2003 .. 1 1 . Graduate College Iowa State University This is to certify that the doctoral dissertation of Tuan Hoang Nguyen has met the requirements of Iowa State University Major Professor For the Major Program ... 111 r5+7 3534 DEDICATION To myparents, for all their sacr$ces i V TABLE OF CONTENTS GENERAL INTRODUCTION CHAPTER I. Synthesis of the Bicyclic Core of Hyperforin and

20

Challenges for Inverted Hybrid Inflation  

E-Print Network [OSTI]

Inverted hybrid inflation (in which the inflaton field slowly rolls away from the origin, giving a spectral index $n\\lsim 1$) is an appealing variant of the more usually studied hybrid model. Analysing the model alongside the ordinary hybrid case, we show that, in order to provide the correct density perturbations consistent with the COBE measurements, the dimensionless coupling constants of the inverted hybrid potential must be very small indeed. For example, the quartic coupling in a typical such potential is found to be $\\lsim 10^{-12}$. A supersymmetric model of inverted hybrid inflation, which does not involve the troublesome quartic coupling is found to lead to a potential which is unbounded from below.

S. F. King; J. Sanderson

1997-07-11T23:59:59.000Z

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.


21

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

22

Inverter R&D | Department of Energy  

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

Inverter R&D Inverter R&D 2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting ape053chinthavali2013p.pdf...

23

Update on SIC-Based Inverter Technology  

SciTech Connect (OSTI)

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

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

2009-01-01T23:59:59.000Z

24

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

25

Summary of Inverter Technologies Prepared for the  

E-Print Network [OSTI]

Summary of Inverter Technologies Prepared for the U.S. Department of Energy Office of Electricity Program Subtask 3.1 Photovoltaic Systems: Report 2 Summary of Inverter Technologies Submitted by Hawai agency thereof. #12;1 Summary of Inverter Technologies TableofContents 1. Introduction

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.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

27

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

28

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

29

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

30

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

31

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

32

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

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

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

35

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

36

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...

37

Inverter Cost Analysis and Marketing Intelligence | Department...  

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

and Marketing Intelligence Inverter Cost Analysis and Marketing Intelligence 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and...

38

Next Generation Inverter | Department of Energy  

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

and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting ape040smith2012o.pdf More Documents & Publications Next Generation Inverter Vehicle Technologies...

39

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

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

Vehicles - ORNL inverter licensed ... Oak Ridge start-up New Hybrid Technologies has licensed a power conversion technology developed by Gui-Jia Su of Oak Ridge National...

40

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.

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

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

42

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

43

Turning Ocean Water Into Rain  

Science Journals Connector (OSTI)

...an alternative method of desalination for mainland communities...Although thermally driven desalination may be a good option for...a good attempt, but the economics will have to be proved. Kathiroli...are just starting out. Desalination. Turning ocean water into...

Yudhijit Bhattacharjee

2007-06-29T23:59:59.000Z

44

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

45

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

46

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...

47

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

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

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

48

Advanced Inverter Functions to Support High Levels of Distributed...  

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

of advanced inverters. THE NEED FOR ADVANCED INVERTER FUNCTIONS Distributed solar capacity is increasing rapidly as technologies advance, prices decline, markets shift, and...

49

Building America Whole-House Solutions for Existing Homes: Inverted...  

Energy Savers [EERE]

Solutions for Existing Homes: Inverted Attic Bulkhead for HVAC Ductwork This occupied test home received a modified truss system to accommodate ductwork within an inverted...

50

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...

51

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...

52

Inverted and multiple nematic emulsions  

Science Journals Connector (OSTI)

We investigate experimentally the structures that form when small colloidal particles are suspended in a nematic solvent. These structures are anisotropic, and their formation is driven by interactions arising from the orientational elasticity of the nematic solvent. By using inverted and multiple nematic emulsions composed of water droplets dispersed in a thermotropic liquid crystal, we identify the nature of these interactions, and demonstrate that they can be controlled by the anchoring of the liquid crystal molecules at the surfaces of the droplets. When the anchoring is normal, the droplets form linear chains, suggesting a long-range dipole-dipole attraction between the particles. By contrast, the interactions are repulsive at short range, and prevent contact of the droplets, thereby stabilizing them against coalescence. When the anchoring is planar, the droplets generate distortions that have a quadrupolar character. The resultant elastic interactions lead to more compact, but still anisotropic, clusters.

P. Poulin and D. A. Weitz

1998-01-01T23:59:59.000Z

53

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

54

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

55

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

56

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.

57

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

58

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

59

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

60

Definition: Controllable and Regulating Inverter | Open Energy Information  

Open Energy Info (EERE)

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

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While these samples are representative of the content of NLEBeta,
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61

EMPLACEMENT DRIFT INVERT-LOW STEEL EVALUATION  

SciTech Connect (OSTI)

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

M. E. Taylor and D. H. Tang

2000-09-29T23:59:59.000Z

62

Laser turns 50 (Inside Business) | Jefferson Lab  

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

https:www.jlab.orgnewsarticleslaser-turns-50-inside-business Laser turns 50 Not yet beaming us up, lasers have still come a long way, Scotty By Michael Schwartz, Inside...

63

Radio-Frequency Inverters With Transmission-Line Input Networks  

E-Print Network [OSTI]

A soft-switching inverter topology (the Class Phi ) is presented which draws dc source current through a transmission line or a lumped-network approximation of a distributed line. By aligning the inverter switching frequency ...

Phinney, Joshua W.

64

Radial Error Feedback Geometric Adaptive Control for Bar Turning in CNC Turning Centers  

E-Print Network [OSTI]

Radial Error Feedback Geometric Adaptive Control for Bar Turning in CNC Turning Centers by Chun Fan-6046 liu@eng.fsu.edu, indwang1@eng.fsu.edu Abstract In-process measurement and control of CNC machines can adaptive control (REFGAC) system for bar turning in CNC turning centers. REFGAC system was design to com

Collins, Emmanuel

65

Inferring Ancestral Chloroplast Genomes with Inverted Repeat  

E-Print Network [OSTI]

Inferring Ancestral Chloroplast Genomes with Inverted Repeat Liying Cui # , Feng Yue + , Claude W 87131 Abstract--- Genome evolution is shaped not only by nucleotide substitutions, but also by structural changes including gene and genome duplications, inser­ tions/deletions and gene order

Tang, Jijun

66

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

67

Chaos in Robert Hooke's inverted cone  

Science Journals Connector (OSTI)

...Hooke's inverted cone Mederic Argentina 1 2 Pierre Coullet 1 2 Jean-Marc...minus the conservation of energy and the conservation of angular...include its rotational kinetic energy. So, we will denote it as...the equations. The kinetic energy T is The potential energy U...

2007-01-01T23:59:59.000Z

68

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.

69

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

70

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

71

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

72

Summary Review of Advanced Inverter Technologies for Residential PV Systems  

E-Print Network [OSTI]

Summary Review of Advanced Inverter Technologies for Residential PV Systems This report summarizes current and emerging standards for residential PV systems and identifies the status of emerging inverter of Hawai`i at Manoa #12;Summary of Inverter Technologies Prepared for the U.S. Department of Energy Office

73

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

74

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

75

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

76

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

77

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.

78

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

79

Right Turn on Red! | Department of Energy  

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

Right Turn on Red! Right Turn on Red! Right Turn on Red! August 25, 2011 - 12:05pm Addthis Right Turn on Red is a policy that was enacted in the 1970s to help save drivers fuel and money at the pump. | Energy Department Image | Photo by Hantz Leger Right Turn on Red is a policy that was enacted in the 1970s to help save drivers fuel and money at the pump. | Energy Department Image | Photo by Hantz Leger Dan Leistikow Dan Leistikow Former Director, Office of Public Affairs Last week, as part of our inaugural edition of Plugged In! -- an email newsletter for staff and contractors here at the Energy Department -- I asked readers for more information about the Right Turn on Red policy that was enacted in the 1970s to help save fuel. I'm happy to report that we received several responses from individuals across the Department with more

80

ARM - VAP Product - 10rlprofdep1turn  

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

rlprofdep1turn rlprofdep1turn Documentation Data Management Facility Plots (Quick Looks) Citation DOI: 10.5439/1027252 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Example 10rlprofdep1turn Data Plot Example 10rlprofdep1turn data plot VAP Output : 10RLPROFDEP1TURN 10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm Active Dates 1998.03.01 - 2013.12.28 Originating VAP Process Raman LIDAR Vertical Profiles : RLPROF Description The primary goal of the Raman Lidar Profiles - Depolarization Ratio (RLPROF_DEP) VAP is to produce linear depolarization ratio profiles. Linear depolarization is defined as the ratio of the cross-polarized return to the

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

ARM - VAP Product - 10rlprofbe1turn  

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

turn turn Documentation Data Management Facility Plots (Quick Looks) Citation DOI: 10.5439/1027251 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Example 10rlprofbe1turn Data Plot Example 10rlprofbe1turn data plot VAP Output : 10RLPROFBE1TURN Raman LIDAR (RL): Best-estimate state of the atmos. profiles from RL & AERI+GOES retrievals Active Dates 1998.03.01 - 2004.01.06 Originating VAP Process Raman LIDAR Vertical Profiles : RLPROF Measurements The measurements below provided by this product are those considered scientifically relevant. Aerosol optical depth Aerosol scattering Backscatter depolarization ratio Backscattered radiation Cloud base height Liquid water content

82

Powerpedia Turns Two | Department of Energy  

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

Powerpedia Turns Two Powerpedia Turns Two Powerpedia Turns Two January 27, 2012 - 3:15pm Addthis The 500 most viewed pages on Powerpedia, the Energy Department's internal information-sharing website which turned two on January 27, 2011. | Image credit Thomas O'Neill. The 500 most viewed pages on Powerpedia, the Energy Department's internal information-sharing website which turned two on January 27, 2011. | Image credit Thomas O'Neill. Bob Brese Chief Information Officer (Acting) By almost any measure Wikipedia has revolutionized information sharing the world over. Every minute of the day, volunteers are collaborating on more than 20 million articles throughout the site. The Energy Department, inspired by the idea of creating a centralized hub for collaboration and information, launched its own internal wiki -

83

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

84

On real number labelings and graph invertibility  

Science Journals Connector (OSTI)

For non-negative real x"0 and simple graph G, @l"x"""0","1(G) is the minimum span over all labelings that assign real numbers to the vertices of G such that adjacent vertices receive labels that differ by at least x"0 and vertices at distance two receive ... Keywords: ?-invertible, ?j,k-labeling, ?x,1-labeling, Distance-constrained labeling, Kneser graphs, Self-complementary graphs

Jeong-Ok Choi; John Georges; David Mauro; Yan Wang

2012-10-01T23:59:59.000Z

85

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

86

Turning Grass into Gas for Less  

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

Grass into Gas for Less Turning Grass into Gas for Less Simulations Unlock Secrets of Cellulose Deconstruction September 30, 2011 Contact: Margie Wylie, mwylie@lbl.gov, +1 510...

87

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

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

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

88

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

Office of Scientific and Technical Information (OSTI)

Inverters Fang Zheng Peng, Senior Member, IEEE University of Tennessee, Knoxville Oak Ridge National Laboratory Oak Ridge, Tennessee 37831-8058 Phone: 423-576-7261,...

89

Microsoft PowerPoint - Update on IEC Inverter Standards Activity...  

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

1, 2013 Update on IEC Inverter Standards Activity IEC Technical Committee (TC) 82 Solar photovoltaic energy systems IEC International Electrotechnical Commission, founded...

90

Design considerations for inverters in fluid flow control  

E-Print Network [OSTI]

~ Load Curves Bed uo St" tc dead X Lo. S. at, c Head F joe ate Fig. 2. 5 System load curves with difl'erent static head. C. SYSTEM REQUIREMENTS Cost of a variable frequency drive is so moderate and the energy saving potential so great that many... Inverter This type of drive rectifies AC input power and delivers variable DC voltage to a section of the power conversion unit called the inverter section. The inverter section then inverts the variable voltage DC to variable voltage and frequency AC...

Guggari, Mallappa Ishwarappa

2012-06-07T23:59:59.000Z

91

A Multilevel Voltage-Source Inverter with Separate DC Sources  

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

cycle as the number of levels increases. It can solve the problems of conventional transformer-based multipulse inverters and the problems of the multilevel diode-clamped...

92

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.

93

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...

94

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

95

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

96

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.

97

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.

98

Solar Decathlon Turns Ten | Department of Energy  

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

Turns Ten Turns Ten Solar Decathlon Turns Ten September 28, 2012 - 2:22pm Addthis For the past 10 years, the Solar Decathlon has educated consumers about affordable clean energy products that save energy and money, and provided hands-on training for jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. For the past 10 years, the Solar Decathlon has educated consumers about affordable clean energy products that save energy and money, and provided hands-on training for jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs Solar Decathlon 2013 The next Solar Decathlon event will be held in Irvine, California,

99

Solar Decathlon Turns Ten | Department of Energy  

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

Solar Decathlon Turns Ten Solar Decathlon Turns Ten Solar Decathlon Turns Ten September 28, 2012 - 2:22pm Addthis For the past 10 years, the Solar Decathlon has educated consumers about affordable clean energy products that save energy and money, and provided hands-on training for jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. For the past 10 years, the Solar Decathlon has educated consumers about affordable clean energy products that save energy and money, and provided hands-on training for jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs Solar Decathlon 2013

100

Solar Decathlon Turns Ten | Department of Energy  

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

Solar Decathlon Turns Ten Solar Decathlon Turns Ten Solar Decathlon Turns Ten September 28, 2012 - 2:22pm Addthis For the past 10 years, the Solar Decathlon has educated consumers about affordable clean energy products that save energy and money, and provided hands-on training for jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. For the past 10 years, the Solar Decathlon has educated consumers about affordable clean energy products that save energy and money, and provided hands-on training for jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs Solar Decathlon 2013

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

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.

102

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...

103

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

104

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

105

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 of the inverters. Keywords-Photovoltaic energy conversion, Markov reliability models, utility-interactive inverters, energy yield estimation. I. INTRODUCTION Photovoltaic systems have gained prominence as economically

Liberzon, Daniel

106

Separating myths from reality in PV inverter reliability  

E-Print Network [OSTI]

requires electrolytics #12;Reliability predictor models · MIL-HDBK 217F ­ Last updated in 1995 ­ Does the reliability claims of microinverters dubious. #12;Does what affects string inverters affect microinverters? · In 2006 NCI was commissioned to determine feasibility of DOE goal of $0.25/Watt for inverters by 2020

Rollins, Andrew M.

107

Mono inverter Multi parallel PMSM -Structure and Control strategy  

E-Print Network [OSTI]

a new and original Mono inverter Multi parallel Permanent Magnet Synchronous Motor (PMSM) systemMono inverter Multi parallel PMSM - Structure and Control strategy Damien Bidarta , Maria Pietrzak, braking system...). However, a MMS with machines operating independently needs a high number of power

Boyer, Edmond

108

Results of Sandia National Laboratories grid-tied inverter testing  

SciTech Connect (OSTI)

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

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

1998-07-01T23:59:59.000Z

109

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

110

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

111

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

112

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

113

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

114

When Green Turns to Gold | Photosynthetic Antenna Research Center  

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

When Green Turns to Gold May 6, 2014 When Green Turns to Gold PARC Certificate Graduate Harry Bolson explains the importance of LEED Certification at WUSTL...

115

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...

116

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

117

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

118

Turning on the Fan and Turning off the A/C | Department of Energy  

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

Turning on the Fan and Turning off the A/C Turning on the Fan and Turning off the A/C Turning on the Fan and Turning off the A/C September 20, 2010 - 3:00pm Addthis As part of some recent money- and energy-savings improvements I've been making to my home, a couple of weeks ago I installed a ceiling fan in my main living room. Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory As part of some recent money- and energy-savings improvements I've been making to my home, a couple of weeks ago I installed a ceiling fan in my main living room. Part of my research led me to understand how ceiling fans are considered the most effective fans compared among table fans, floor fans, and fans mounted to poles or walls because they effectively circulate the air in a room to create a draft throughout the room.

119

Turning on the Fan and Turning off the A/C | Department of Energy  

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

Turning on the Fan and Turning off the A/C Turning on the Fan and Turning off the A/C Turning on the Fan and Turning off the A/C September 20, 2010 - 3:00pm Addthis As part of some recent money- and energy-savings improvements I've been making to my home, a couple of weeks ago I installed a ceiling fan in my main living room. Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory As part of some recent money- and energy-savings improvements I've been making to my home, a couple of weeks ago I installed a ceiling fan in my main living room. Part of my research led me to understand how ceiling fans are considered the most effective fans compared among table fans, floor fans, and fans mounted to poles or walls because they effectively circulate the air in a room to create a draft throughout the room.

120

Electrical aging of stator insulation of low voltage rotating machines supplied by inverters  

SciTech Connect (OSTI)

Nowadays, use of inverters for speed variation of low voltage motors becomes more and more usual. The most common technology for this kind of apparatus uses the Pulse Width Modulation (PWM). It is characterized by a square voltage shape with short rise and fall times. In order to insure the quality of turn to ground insulation submitted to these constraints, a study on the aging of Polyethylene terephthalate (Mylar{trademark}) has been undertaken. Influence of rise and fall times, frequency and voltage magnitude has been investigated for time duration up to 1,000 hours. To realize a good voltage application, samples were previously metalized. Two different behaviors according to the rise time and magnitude are observed. For long rise and fall times, changes in the capacity values are obtained although, for smaller rise or fall times, a degradation of the metalized electrode appears. A surface charge generation process is discussed to explain this phenomena.

Bellomo, J.P.; Lebey, T. [Lab. Genie Electrique de Toulouse (France); Oraison, J.M.; Peltier, F. [Leroy-Somer, Angouleme (France)

1996-12-31T23:59:59.000Z

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

The mixed capacitated general routing problem with turn penalties  

Science Journals Connector (OSTI)

In this paper we deal with the mixed capacitated general routing problem with turn penalties. This problem generalizes many important arc and node routing problems, and it takes into account turn penalties and forbidden turns, which are crucial in many ... Keywords: Capacitated general routing problem, Transformation, Turn penalties, Vehicle routing

Olli Brysy; Eulalia Martnez; Yuichi Nagata; David Soler

2011-09-01T23:59:59.000Z

122

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

123

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.

124

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

125

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.

126

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 - This paper addresses the harmonic compensation error problem existing with parallel connected inverter grid connected inverter, it is found that multiple parallel connected inverters and grid impedance can

Bak, Claus Leth

127

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

128

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

129

Inverter Testing at Sandia National Laboratories* Jerry W. Ginn  

Office of Scientific and Technical Information (OSTI)

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

130

Chaos in Robert Hooke's inverted cone BY MEDERIC ARGENTINA  

E-Print Network [OSTI]

Chaos in Robert Hooke's inverted cone BY ME´DE´RIC ARGENTINA 1,2 , PIERRE COULLET 1,2 , JEAN of the cone and the angle f indicates its azimuthal position) minus the conservation of energy

Argentina, Mederic

131

Sandia National Laboratories: grid-tied wind-power inverters  

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

wind-power inverters Sandia, DOE Energy Storage Program, GeneSiC Semiconductor, U.S. Army ARDEC: Ultra-High-Voltage Silicon Carbide Thyristors On March 29, 2013, in Capabilities,...

132

Inverter Testing at Sandia National Laboratories* Jerry W. Ginn  

Office of Scientific and Technical Information (OSTI)

grid. The only grid-tied inverters that have been produced in quantity have had a capacity of a few kilowatts. Typically, they have been produced in response to projects that...

133

Sandia National Laboratories: grid-tied solar inverters  

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

solar inverters Sandia, DOE Energy Storage Program, GeneSiC Semiconductor, U.S. Army ARDEC: Ultra-High-Voltage Silicon Carbide Thyristors On March 29, 2013, in Capabilities,...

134

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

135

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

136

Vehicle Technologies Office Merit Review 2014: Inverter R&D  

Broader source: Energy.gov [DOE]

Presentation given by Oak Ridge National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about inverter R&D.

137

Direct modelling of envelope dynamics in resonant inverters  

E-Print Network [OSTI]

as the LCC inverter shown in Fig. 1 are used in a variety of applications including electronic ballasts vs(t) in Fig. 1 contains a fundamental component as well as higher-order harmonics. If the switching

138

Definition: Controllable/Regulating Inverter | Open Energy Information  

Open Energy Info (EERE)

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

139

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

140

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

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

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

142

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

143

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.

144

EECBG Success Story: How Chula Vista, California is Turning Cooking...  

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

Chula Vista, California is Turning Cooking Oil Into Savings EECBG Success Story: How Chula Vista, California is Turning Cooking Oil Into Savings January 19, 2011 - 1:21pm Addthis...

145

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

146

UK universities turning more and more to private funding  

Science Journals Connector (OSTI)

... Nature Publishing Group 10.1038/334463c0 UK universities turning more and more to private fundingChristine

Christine McGourty

1988-08-11T23:59:59.000Z

147

Invert/EE-Lab Website | Open Energy Information  

Open Energy Info (EERE)

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

148

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

149

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

150

When to Turn Off Your Lights | Department of Energy  

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

When to Turn Off Your Lights When to Turn Off Your Lights When to Turn Off Your Lights August 30, 2012 - 7:53pm Addthis The cost effectiveness of when to turn off lights depends on the type of lights and the price of electricity. | Photo courtesy of ©iStockphoto.com/kyoshino. The cost effectiveness of when to turn off lights depends on the type of lights and the price of electricity. | Photo courtesy of ©iStockphoto.com/kyoshino. What does this mean for me? The type of lights and the price of electricity determine whether it's best to turn lights off when you leave a room. Consider using sensors, timers, and other automatic lighting controls. The cost effectiveness of when to turn off lights depends on the type of bulb and the cost of electricity. The type of lightbulb you use is

151

When to Turn Off Your Lights | Department of Energy  

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

When to Turn Off Your Lights When to Turn Off Your Lights When to Turn Off Your Lights August 30, 2012 - 7:53pm Addthis The cost effectiveness of when to turn off lights depends on the type of lights and the price of electricity. | Photo courtesy of ©iStockphoto.com/kyoshino. The cost effectiveness of when to turn off lights depends on the type of lights and the price of electricity. | Photo courtesy of ©iStockphoto.com/kyoshino. What does this mean for me? The type of lights and the price of electricity determine whether it's best to turn lights off when you leave a room. Consider using sensors, timers, and other automatic lighting controls. The cost effectiveness of when to turn off lights depends on the type of bulb and the cost of electricity. The type of lightbulb you use is

152

Application of Artificial Neural Network in Control of Vector Pulse-Width Modulation Inverter  

Science Journals Connector (OSTI)

This paper describes neural controller that performs optimal switching strategy of VSI-PWM inverter. The strategy is based on rearranging the order of inverter output vectors in order to reduce the number of switched tranzistors during one time period, ...

Pavel Brandstetter; Martin Skotnica

1999-05-01T23:59:59.000Z

153

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...

154

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

155

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

E-Print Network [OSTI]

Inverter 3600 92 No NA Pacific Solar Pty Limited SDEIP2-09 240W, 240V Module PV Inverter for the Sun-240 Interactive Inverter 2800 97 Yes NA SatCon Power Systems Canada Ltd. AE-100-60- PV-A Three phase 100kW Utility Interactive inverter 100000 96 No NA SatCon Power Systems Canada Ltd. AE-225-60- PV-A 225 kW Three phase

156

A modified split-supply switched-reluctance drive inverter  

SciTech Connect (OSTI)

This paper describes the application of a new simple voltage-boosting feature to split-supply SR (switched-reluctance) inverter. As its name implies, the SR motor always operates in switching mode and has distinct motoring and generating rotor angular regions. The effectiveness of the energy conversion process of SR motor depends basically on the ability of its inverter to inject adequate current during the positive-torque angular region and to reduce the current to negligible value during negative-torque angular region. The modified inverter effectively generates boost voltages for accelerating current build-up and decay and hence enhances the performance of SR drives. Benefits of the added boosting include: higher average current, better energy recovery during commutation and a wider feasible speed range. This paper will assess the implications of the boost feature on inverter cost and performance. A time-stepping simulation procedure which includes the modelling of current overlapping between phases will be presented together with simulation results.

Chan, S.; Omar, A.M. [Mara Inst. of Tech., Selangor (Malaysia). Dept. of Electrical Engineering

1995-12-31T23:59:59.000Z

157

The minimal number of generators of an invertible ideal  

E-Print Network [OSTI]

The minimal number of generators of an invertible ideal Bruce Olberding1 and Moshe Roitman2 1 New of an integral ideal). We denote the minimal number of generators of an ideal I of R by R(I). If R is a Dedekind ideal I; moreover, I is strongly 2- generated, in the sense that one of the generators can

Olberding, Bruce

158

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

159

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

160

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

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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

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

162

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

163

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

164

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

165

The Research of Non-isolated Photovolatic Grid-connected Inverter Based on DSP&ARM  

Science Journals Connector (OSTI)

Implementation scheme of non-isolated photovolatic grid-connected inverter based on DSP & ARM is proposed in the paper. The structure and principle of non-isolated grid-connected inverter is introduced. The design of hardware and software system based ... Keywords: non-isolated, grid-connected inverte, deadbeat control, MPPT

Zhang Xiaoli; Xue Jiaxiang; Liang Yongquan; Cui Longbin

2012-04-01T23:59:59.000Z

166

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

167

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

168

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

169

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

170

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

171

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

172

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

173

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.

174

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

175

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.

176

Inverter Procedures Guideline i DRAFT Guideline for the use of the  

E-Print Network [OSTI]

Inverter Procedures Guideline i DRAFT Guideline for the use of the Performance Test Protocol for Evaluating Inverters Used in GridConnected Photovoltaic Systems Prepared by Bill Brooks KEMAXenergy.whitaker@bewengineering.com #12;Inverter Procedures Guideline 1 DRAFT Guideline for the use of the Performance Test

177

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

178

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

179

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

180

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

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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

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

182

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

183

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

184

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

185

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

186

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

187

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

188

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

189

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)

190

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

191

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.

192

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

193

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

194

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

195

LLCC-PWM Inverter for Driving High-Power Piezoelectric Actuators  

E-Print Network [OSTI]

LLCC-PWM Inverter for Driving High-Power Piezoelectric Actuators Rongyuan Li, Norbert Fröhleke LLCC-PWM inverter is presented for driving ultrasonic high power piezoelectric actuators. The proposed system of a pulse- width modulated inverter and LLCC-type filter is designed in a way to reduce the total

Paderborn, Universität

196

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

197

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.

198

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.

199

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

200

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

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

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

202

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

203

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

204

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

205

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

206

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

207

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

208

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

209

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 voltage application due to semiconductor constraint. In order to achieve higher power level, hybrid

Catholic University of Chile (Universidad Católica de Chile)

210

LINEAR COUPLING CORRECTION WITH N-TURN MAPS.  

SciTech Connect (OSTI)

The linear one-turn map of a storage ring contains coupling information on which a correction algorithm can be based. In principal, the one-turn matrix can be fitted from turn-by-turn data of beam position monitors after a kick was applied. However, the so obtained coupling information often sinks into the noise floor. The signal-to-noise ratio of the coupling information can be greatly enhanced by fitting maps for larger turn numbers N, equal to half the beat period. With the so obtained N-turn map an automated global coupling correction is possible without the need for a tune change. This is demonstrated for the Relativistic Heavy Ion Collider where the algorithm is implemented for operational use at injection.

FISCHER,W.

2003-05-12T23:59:59.000Z

211

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

212

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

213

PPPL featured as DOE celebrates turning 35 | Princeton Plasma...  

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

PPPL featured as DOE celebrates turning 35 October 5, 2012 Tweet Widget Google Plus One Share on Facebook 35 Years at the Department of Energy (Flickr Photostream)...

214

Nuclear Navy Turns 50 | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Navy Turns 50 | National Nuclear Security Administration Navy Turns 50 | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Our History > NNSA Timeline > Nuclear Navy Turns 50 Nuclear Navy Turns 50 August 01, 1998 Washington, DC Nuclear Navy Turns 50 Crew members of the U.S.S. Enterprise, the first nuclear-powered aircraft

215

Nuclear Navy Turns 50 | National Nuclear Security Administration  

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

Navy Turns 50 | National Nuclear Security Administration Navy Turns 50 | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Our History > NNSA Timeline > Nuclear Navy Turns 50 Nuclear Navy Turns 50 August 01, 1998 Washington, DC Nuclear Navy Turns 50 Crew members of the U.S.S. Enterprise, the first nuclear-powered aircraft

216

Illinois Turning Landfill Trash into Future Cash | Department of Energy  

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

Turning Landfill Trash into Future Cash Turning Landfill Trash into Future Cash Illinois Turning Landfill Trash into Future Cash September 28, 2010 - 5:35pm Addthis Illinois Turning Landfill Trash into Future Cash Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs Will County, Illinois officials yesterday formally broke ground on a new $7 million project (that includes $1 million of Energy Efficiency Conservation Block Grant funds) to turn methane gas from the Prairie View Landfill into electricity in a partnership with Waste Management. Will County will receive revenue from the sale of the gas created from decomposing garbage which will be harnessed and converted to generate 4.8 megawatts of green electrical power and used to power up to 8,000 homes. The future revenue generated from the sale of the gas and the sale of the

217

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

218

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

219

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

220

Synchronization of a renewable energy inverter with the grid  

Science Journals Connector (OSTI)

The design mathematical analysis and testing results of the architecture of a new all-digital phase-locked loop system for synchronizing a voltage source DC-AC single-phase inverter with the low voltage utility grid are presented. The system which is based on the time-delay digital tanlock loop was simulated using matlab/simulink and was tested by subjecting the grid voltage to various perturbations similar to those which can occur in a real power system such as voltage sags and nonlinear distortion of the grid voltage waveform. Results indicate that even in the presence of such perturbations the system achieved and/or re-gained synchronization within 100?ms. The proposed system is all-digital and can be readily implemented using a field programmable gate array and easily embedded into a power inverter.

Nader Anani; Omar Al-Kharji AlAli; Mahmoud Al-Qutayri; Saleh AL-Araji

2012-01-01T23:59:59.000Z

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.


221

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

222

Media Center - Argonne Partners with Delphi on Inverter  

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

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

223

LX-17 Corner-Turning and Reactive Flow Failure  

SciTech Connect (OSTI)

We have performed a series of highly-instrumented experiments examining corner-turning of detonation. A TATB booster is inset 15 mm into LX-17 (92.5% TATB, 7.5% kel-F) so that the detonation must turn a right angle around an air well. An optical pin located at the edge of the TATB gives the start time of the corner-turn. The breakout time on the side and back edges is measured with streak cameras. Three high-resolution X-ray images were taken on each experiment to examine the details of the detonation. We have concluded that the detonation cannot turn the corner and subsequently fails, but the shock wave continues to propagate in the unreacted explosive, leaving behind a dead zone. The detonation front farther out from the corner slowly turns and eventually reaches the air well edge 180{sup o} from its original direction. The dead zone is stable and persists 7.7 {micro}s after the corner-turn, although it has drifted into the original air well area. Our regular reactive flow computer models sometimes show temporary failure but they recover quickly and are unable to model the dead zones. We present a failure model that cuts off the reaction rate below certain detonation velocities and reproduces the qualitative features of the corner-turning failure.

Souers, P C; Andreski, H; Cook III, C F; Garza, R; Pastrone, R; Phillips, D; Roeske, F; Vitello, P; Molitoris, J

2004-03-11T23:59:59.000Z

224

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

225

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

226

Pumpkin Power: Turning Food Waste into Energy | Department of Energy  

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

Pumpkin Power: Turning Food Waste into Energy Pumpkin Power: Turning Food Waste into Energy Pumpkin Power: Turning Food Waste into Energy November 1, 2013 - 1:28pm Addthis Pumpkin Power: Turning Food Waste into Energy Matthew Loveless Matthew Loveless Data Integration Specialist, Office of Public Affairs What are the key facts? 1.4 billion pounds of pumpkins are produced in the U.S. each year, many of which end up in landfills or compost piles after Halloween. Oakland's EBMUD collects food waste and uses microbes to convert it into methane gas that is burned to generate electricity. The Energy Department is helping to fund the development of integrated biorefineries, industrial centers dedicated to converting plant material into biofuels and other products. To commemorate National Energy Action Month, we're featuring some scarily

227

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

228

Turning Leftover Trees into Biogasoline | Department of Energy  

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

Turning Leftover Trees into Biogasoline Turning Leftover Trees into Biogasoline Turning Leftover Trees into Biogasoline June 7, 2010 - 11:00am Addthis Researchers at Virginia Tech are working to show how biogasoline could potentially be created in existing petroleum refineries, instead of at new biorefineries as shown here. | File illustration Researchers at Virginia Tech are working to show how biogasoline could potentially be created in existing petroleum refineries, instead of at new biorefineries as shown here. | File illustration Joshua DeLung Could leftover Christmas trees be turned into biogasoline? That's the question researchers at Virginia Polytechnic Institute and State University have been working for three years to address. The research team says making stable biogasoline in existing refineries- from

229

Cascaded H-bridge inverter motor drives for hybrid electric vehicle applications  

Science Journals Connector (OSTI)

This paper presents the asymmetric cascaded H-bridge multilevel inverter for electric vehicles (EV) and hybrid electric vehicles (HEV) applications. Currently available power inverter systems for HEVs use a DC-DC boost converter to boost the battery voltage for a traditional three-phase inverter. The present HEV drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. Asymmetric cascaded H-bridge multilevel inverter design for EV and HEV applications without the use of inductors to output a boosted AC voltage is proposed in this paper. Traditionally, each H-bridge needs a DC power supply having equal values of DC power sources. The proposed design uses the asymmetric cascaded multilevel inverter using non-equal DC power sources based on specified ratios. A fundamental switching scheme is used to do modulation control and to produce a seven-level phase voltage.

P. Renuga; T. Prathiba

2012-01-01T23:59:59.000Z

230

Lower-Temperature Invert Design For Diffusion Barrier  

SciTech Connect (OSTI)

The objective of this analysis is to advance the state of the subsurface facilities design to primarily support the ''Yucca Mountain Science and Engineering Report'' (DOE 2001) and to also support the preparation and revision of System Description Document's Section 2 system descriptions (CRWMS M&O 2001, pp. 9 and 11). The results may also eventually support the License Application (CRWMS M&O 2001, p. 3). The Performance Assessment Department will be the primary user of the information generated and will be used in abstraction modeling for the lower-temperature scenario (CRWMS M&O 200 1, p. 27). This analysis will evaluate the invert relative to the lower- and higher-temperature conditions in accordance with the primary tasks below. Invert design is a major factor in allowing water entering the drift to pass freely and enter the drift floor without surface ponding and in limiting diffusive transport into the host rock. Specific cost effective designs will be conceptualized under the new lower-temperature conditions in this analysis. Interfacing activities and all aspects of Integrated Safety Management and Nuclear Culture principles are included in this work scope by adhering to the respective principles during this design activity and by incorporating safety into the design analysis (CRWMS M&O 2001, p. 8). Primary tasks of this analysis include identifying available design information from existing sources on the invert as a diffusive barrier, developing concepts that reduce the amount steel, and developing other design features that accommodate both lower- and higher-temperature operating modes (CRWMS M&O 2001, p.16).

Bruce Stanley

2001-07-30T23:59:59.000Z

231

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

232

Steady-state and transient-state analyses of renewable energy inverter.  

E-Print Network [OSTI]

??Distributed resources (DR), such as residential small wind turbines and solar cells, generate electrical energy in the form of a direct current (DC). An inverter (more)

Tamtam, Perlekar

2012-01-01T23:59:59.000Z

233

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...

234

Robust iterative learning control of single-phase grid-connected inverter  

Science Journals Connector (OSTI)

For the single phase inductance-capacitance-inductance (LCL) grid-connected inverter in micro-grid, a kind of robust iterative learning controller...

Zhong-Qiang Wu; Chun-Hua Xu; Yang Yang

2014-08-01T23:59:59.000Z

235

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

236

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

237

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

238

Former Student Turns Thesis Into Energy Savings for Taylor University |  

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

Former Student Turns Thesis Into Energy Savings for Taylor Former Student Turns Thesis Into Energy Savings for Taylor University Former Student Turns Thesis Into Energy Savings for Taylor University October 18, 2010 - 10:00am Addthis Kevin Crosby, Taylor University’s first coordinator of stewardship and sustainability, promotes environmental awareness among students, faculty and staff. | Photo courtesy of Andrew Ketchum, The Echo | Kevin Crosby, Taylor University's first coordinator of stewardship and sustainability, promotes environmental awareness among students, faculty and staff. | Photo courtesy of Andrew Ketchum, The Echo | Maya Payne Smart Former Writer for Energy Empowers, EERE Not long ago Kevin Crosby was an engineering major and the president of Taylor University's student environmental club, Stewards of Creation.

239

Turning Sun and Water Into Hydrogen Fuel | Department of Energy  

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

Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel May 5, 2011 - 1:27pm Addthis Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D. Damsgaard, Thomas Pedersen and Ole Hansen, Technical University of Denmark Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D.

240

How Chula Vista, California Is Turning Cooking Oil Into Savings |  

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

How Chula Vista, California Is Turning Cooking Oil Into Savings How Chula Vista, California Is Turning Cooking Oil Into Savings How Chula Vista, California Is Turning Cooking Oil Into Savings January 19, 2011 - 1:21pm Addthis Truck 51 of the Chula Vista Fire Department. Truck 51 of the Chula Vista Fire Department. John Young What does this project do? Reuses cooking oil that is normally considered waste, saving taxpayer dollars. Reduces reliance on foreign oil Cuts emissions Anyone who has ever worked in a restaurant probably shudders at the mention of having to dispose of used cooking oil. While not much can be done to eliminate this unpleasant kitchen task, what's changing is how that oil can be recycled to help reduce our dependence on foreign sources of energy. Used cooking oil is a key (and very low cost) ingredient in the production

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

Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car Designer |  

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

Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car Designer Nicole Lambiase: Aspiring Astronaut Turned Next-generation Car Designer January 7, 2010 - 4:05pm Addthis Eric Barendsen Energy Technology Program Specialist, Office of Energy Efficiency and Renewable Energy Nicole Lambiase grew up near Cape Canaveral and the Kennedy Space Center where she attended space shuttle launches, dreamed of the stars and had hopes of becoming an astronaut. In 2004, Nicole's dreams advanced as she began the aeronautical engineering program at Embry-Riddle Aeronautical University in Daytona Beach, Florida. Even though Nicole thrived in the program, she quickly discovered this path would more likely lead her to driving a computer rather than a space module. So Nicole made a leap of faith and switched to the newly-formed mechanical

242

Former Student Turns Thesis Into Energy Savings for Taylor University |  

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

Former Student Turns Thesis Into Energy Savings for Taylor Former Student Turns Thesis Into Energy Savings for Taylor University Former Student Turns Thesis Into Energy Savings for Taylor University October 18, 2010 - 10:00am Addthis Kevin Crosby, Taylor University’s first coordinator of stewardship and sustainability, promotes environmental awareness among students, faculty and staff. | Photo courtesy of Andrew Ketchum, The Echo | Kevin Crosby, Taylor University's first coordinator of stewardship and sustainability, promotes environmental awareness among students, faculty and staff. | Photo courtesy of Andrew Ketchum, The Echo | Maya Payne Smart Former Writer for Energy Empowers, EERE Not long ago Kevin Crosby was an engineering major and the president of Taylor University's student environmental club, Stewards of Creation.

243

Turn Your Key, Be Idle Free | Department of Energy  

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

Turn Your Key, Be Idle Free Turn Your Key, Be Idle Free Turn Your Key, Be Idle Free April 13, 2010 - 7:30am Addthis Shannon Brescher Shea Communications Manager, Clean Cities Program What activity wastes gasoline, costs money, produces pollutants, and yet doesn't get you anywhere? Idling! And yet, every year, Americans waste 3 billion gallons of fuel by idling their vehicles. Idling is running a vehicle any time that it's not moving. In this condition, the car's fuel economy is exactly zero miles per gallon. Although many people think that restarting the engine too often will wear out the starter, that idea is just an "old husband's tale." In fact, idling places unnecessary wear-and-tear on the engine, and many manufacturers discourage it. Although drivers can't avoid some amount of idling, such as being stuck in

244

Turning Numbers into Knowledge: Mastering the Art of Problem Solving  

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

Turning Numbers into Knowledge: Mastering the Art of Problem Solving Turning Numbers into Knowledge: Mastering the Art of Problem Solving Speaker(s): Jonathan Koomey Date: February 12, 2002 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: David Faulkner In this talk, Jonathan Koomey, Staff Scientist and Group Leader in the End-use Forecasting Group, will summarize key "tricks of the trade" summarized in his new book "Turning Numbers into Knowledge: Mastering the Art of Problem Solving". The book focuses on many lessons relevant to working effectively in the research world, including being prepared, creating appropriate documentation, doing back of the envelope calculations, and making good tables and graphs. For more details, check out the book's web site at: http://www.numbersintoknowledge.com

245

Turning Sun and Water Into Hydrogen Fuel | Department of Energy  

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

Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel Turning Sun and Water Into Hydrogen Fuel May 5, 2011 - 1:27pm Addthis Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D. Damsgaard, Thomas Pedersen and Ole Hansen, Technical University of Denmark Tiny silicon pillars, used to absorb light. When dotted with a catalyst of molybdenum sulfide and exposed to sunlight, these pillars generate hydrogen gas from the hydrogen ions liberated by splitting water. Each pillar is approximately two micrometers in diameter. | Photo courtesy of Christian D.

246

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.

247

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

E-Print Network [OSTI]

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

Hone, James

248

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.

249

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

250

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.

251

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 small output filter capacitors are required which provide high impedance to grid voltage harmonics

252

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

253

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

254

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

255

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

256

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

257

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

258

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

259

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

260

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

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

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

262

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

263

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

264

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

265

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)

266

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

267

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

268

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

269

PRECISION CURRENT SOURCE OF THE INVERTER TYPE VCH-3000-12 TO POWER MAGNETIC SYSTEMS OF ACCELERATORS AND CHARGED  

E-Print Network [OSTI]

PRECISION CURRENT SOURCE OF THE INVERTER TYPE VCH-3000-12 TO POWER MAGNETIC SYSTEMS OF ACCELERATORS, with the help of fans placed on the front boards of the Inverter and Rectifier units. Figure 1 shows through the Inverter, Rectifier, LC filter (the resonance frequency is 800 Hz) and the correction circuit

Kozak, Victor R.

270

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.

271

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

272

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"

273

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

274

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

275

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

276

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...

277

Coupling Matrix Synthesis of Nonreciprocal Lossless Two-Port Networks using Gyrators and Inverters  

E-Print Network [OSTI]

A coupling matrix technique is presented for the synthesis of nonreciprocal lossless two-port networks. This technique introduces complex inverters to build the nonreciprocal transversal network corresponding to the nonreciprocal coupling matrix. It subsequently transforms this matrix into canonical topologies through complex similarity transformations. The complex inverters in the final topology are transformed into real inverters and gyrators for implementation simplicity. A second-order example is then given to illustrate the proposed technique. Possible implementations of the gyrators involved in the final design are also discussed.

Zhang, Qingfeng; Ding, Shuai; Caloz, Christophe

2014-01-01T23:59:59.000Z

278

An application for tunes and coupling evaluation from turn-by-turn data at the Fermilab Booster  

SciTech Connect (OSTI)

A console application using the phasing of Turn-by-Turn signals from the different BPMs has been tested at the Fermilab Booster. This technique allows the on-line detection of the beam tunes during the fast Booster ramp in conditions where other algorithms were unsuccessful. The application has been recently expanded to include the computation of the linear coupling coefficients. Algorithm and measurement results are presented. Although improved by the phased sum technique the automatic identification of the tunes is not always successful. This makes the use of the on-line application difficult. Ideas for further improvements are under investigation. Measurements have indicated that the effect of the skew quadrupoles is by a factor 3 weaker than expected from the nominal optics. A calibration of the skew quadrupole circuits using the TBT data is planned.

Marsh, W.; Alexahin, Y.; Gianfelice-Wendt, E.; /Fermilab

2011-03-01T23:59:59.000Z

279

Analysis, control and applications of neutral point clamped PWM inverters  

E-Print Network [OSTI]

. , Hniversity of Pune, Pune, India, Chair of Advisory Commsttee: Dr. P. Enjeti A notable trend in power electronics in recent years has been the widespread use of power semiconductor devices such as: power transistors, gate turn-ofi' thyristors (GTO...) and MOSFET transistor devices. Also the advancements in high voltage integrated circuit (HVIC) technology have demonstrated the integration of power devices and their control logic thereby promising simplified implementation of future power processing...

Jakkli, Ranjit V

1991-01-01T23:59:59.000Z

280

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.

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

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.

282

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

283

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

284

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

285

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

286

Efficient Light Trapping in Inverted Nanopyramid Thin Crystalline Silicon Membranes for Solar Cell Applications  

E-Print Network [OSTI]

Thin-film crystalline silicon (c-Si) solar cells with light-trapping structures can enhance light absorption within the semiconductor absorber layer and reduce material usage. Here we demonstrate that an inverted nanopyramid ...

Mavrokefalos, Anastassios

287

Precise detection and elimination of grid injected DC from single phase inverters  

Science Journals Connector (OSTI)

Single-phase voltage source inverters are used for connecting small scale renewable energy sources to low voltage distribution networks. They operate to supply the network with sinusoidal current. If output tr...

Ashraf Ahmed; Ran Li

2012-08-01T23:59:59.000Z

288

Multilevel neutral point clamped/H-bridge inverters with sinusoidal pulse width modulation.  

E-Print Network [OSTI]

??This project focuses on the topology of multilevel neutral point clamped (NPC)/H-bridge inverters and their modified modulation technique for high-power (megawatts) medium voltage (typically 6000 (more)

Shohel, Arifur Rahman (Author)

2007-01-01T23:59:59.000Z

289

A mini cogeneration station constructed on the basis of a inverted gasifier  

Science Journals Connector (OSTI)

The basic process circuit of a mini cogeneration station constructed on the basis of an internal combustion engine and a inverted gasifier operating on coal fuel is developed. The optimal mode of gasifier operati...

A. M. Dubinin; E. V. Cherepanova; V. G. Tuponogov; O. A. Obozhin

2010-06-01T23:59:59.000Z

290

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

291

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...

292

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

293

Building America Whole-House Solutions for Existing Homes: Inverted Attic Bulkhead for HVAC Ductwork  

Broader source: Energy.gov [DOE]

This occupied test home received a modified truss system to accommodate ductwork within an inverted insulated bulkhead along the attic floor, which saves energy by placing heating, ventilating, and air-conditioning (HVAC) ductwork within the home's thermal boundary.

294

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

295

Computing turn delay in city road network with GPS collected trajectories  

Science Journals Connector (OSTI)

In this paper, we aim to mine turn delay at different times and turn types in city road network based on personal GPS collected trajectories. We provide a method to effectively solve the problem for computing turn delay. By using this method, we can ... Keywords: community, data mining, gps trajectory, turn delay

Hengcai Zhang; Feng Lu; Liang Zhou; Yingying Duan

2011-09-01T23:59:59.000Z

296

Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Central Ohio Turns Central Ohio Turns Trash Into Natural Gas to someone by E-mail Share Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas on Facebook Tweet about Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas on Twitter Bookmark Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas on Google Bookmark Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas on Delicious Rank Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas on Digg Find More places to share Alternative Fuels Data Center: Central Ohio Turns Trash Into Natural Gas on AddThis.com... Nov. 13, 2009 Central Ohio Turns Trash Into Natural Gas W atch how the Solid Waste Authority of Central Ohio turns trash into compressed natural gas for fleet fuel.

297

Fault response of inverter interfaced distributed generators in grid-connected applications  

Science Journals Connector (OSTI)

Abstract Inverter-interfaced distributed generation is prominent in some distribution networks because of the growth of PV and other new sources. In order to ensure that protection system design remains effective in this environment, it is essential to be able to accurately represent inverters in fault current calculations. Calculating the fault current contribution is complicated because of the nature of the transition into current limiting mode and because the current produced is a function of control choices as well as physical components. The desire is for a simple source plus impedance model for incorporation into network studies. Based on knowledge of the control strategy and the details of the method of current limiting, linear analytical equivalent models are proposed whose source and impedance values (at fundamental frequency) can be expressed as a function of the inverter's hardware parameters and controller gains. The dependence of the entry into current limit on the nature and location of other generators in the network leads to a proposal for a load flow based fault analysis incorporating the new models. This iteratively determines which inverter experiences current limiting. The proposed inverter fault models and their use in a network fault analysis have been verified against experimental results in a 3-inverter network.

Cornelis A. Plet; Timothy C. Green

2014-01-01T23:59:59.000Z

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

The Kicker Systems for the PS Multi-turn Extraction  

E-Print Network [OSTI]

A five-turn continuous extraction has up to now been used to transfer the proton beam from the CERN PS to the SPS. This extraction uses an electrostatic septum to cut the filament beam into five slices, causing losses of about 15 %. These losses would be an even greater drawback when the beam intensity is increased for the CERN Neutrinos to Gran Sasso (CNGS) facility. To overcome this Multi-Turn Extraction (MTE) has been implemented, in which the beam is separated, prior to extraction, into a central beam core and four islands. Each beamlet is extracted using a set of kickers and a magnetic septum. For the kickers two new pulse generators have been built, each containing a lumped element Pulse Forming Network (PFN) of 12.5 W, 80 kV and 10.5 ms. For cost reasons existing 15 W transmission line kicker magnets are reused. The PFN characteristic impedance deliberately mismatches that of the magnets to allow a higher maximum kick. The PFN design has been optimised such that undesirable side-effects of the impedanc...

Sermeus, L; Fowler, T

2010-01-01T23:59:59.000Z

300

NETL: News Release - DOE Project Turns Abandoned Oil Lease Into  

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

March 27, 2001 March 27, 2001 DOE Project Turns Abandoned Oil Lease Into Million-Barrel Producer Advanced Technology Brings California Oil Field Back to Life BAKERSFIELD, CA - An abandoned Bakersfield, California oil lease, brought back to life in 1995 by a joint government-industry experimental project, has produced more than a million barrels of oil once thought unrecoverable. The Pru Lease Field is Now Back in Operation - Improved technology made possible by a joint DOE and private industry field test helped bring the Pru Lease back into production. - Because of the success, oil is now flowing from 100 new privately funded wells in the immediate vicinity, and experts predict that the advanced technologies demonstrated in the federally co-funded field test could lead

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

Turning the tide of public opinion on nuclear power  

SciTech Connect (OSTI)

Until the early 1970s, the tide of public opinion in the United States was strongly in favor of nuclear power. New power plants were coming on line frequently, and in 1973-74, there were close to 40 new orders per year for new reactors in the United States. Official government projections estimated 1000 operating reactors by the year 2000. Fuel reprocessing, plutonium recycle, and breeder reactor development were also proceeding smoothly and rapidly. But, in the mid-1970s, the tide suddenly turned against the nuclear industry. How did this come about? In the late 1960s, energetic and idealistic young people who had never experienced economic insecurity or World Wars came of age. Environmentalism was an attractive outlet for their activity in most of the Western world. In the United States, opposition to the Vietnam War, in which these young people had a personal stake, was even more popular at first, but by the early 1970s, Vietnam was winding down, and they turned also to Environmentalism. Numerous environmental groups started up, aided heavily by the favorable connotation of the very word {open_quotes}environmentalist{close_quotes} in the public mind. Their organizational experience, political savvy, and media connections gained from their antiwar protests were powerful assets. But the groups needed specific targets to attack, and they soon found that nuclear power was well-suited for that purpose. Here was a new technology, coming on at a very rapid pace. To the public, radiation was highly mysterious, and people were well aware that it could be dangerous. And, the word danger had taken on a new meaning. Previous generations were well acquainted with death and were much less averse to risk-taking than the generation of the 1970s.

Cohen, B.L. [Univ. of Pittsburgh, PA (United States)

1997-04-01T23:59:59.000Z

302

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

303

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

2012-06-07T23:59:59.000Z

304

Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Rio Rico Fire District Rio Rico Fire District Turns Grease Into Biodiesel to someone by E-mail Share Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into Biodiesel on Facebook Tweet about Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into Biodiesel on Twitter Bookmark Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into Biodiesel on Google Bookmark Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into Biodiesel on Delicious Rank Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into Biodiesel on Digg Find More places to share Alternative Fuels Data Center: Rio Rico Fire District Turns Grease Into Biodiesel on AddThis.com... March 3, 2013 Rio Rico Fire District Turns Grease Into Biodiesel

305

Agricultural Robot Turning in the Headland of Corn Fields Jinlin Xue1,a  

E-Print Network [OSTI]

Agricultural Robot Turning in the Headland of Corn Fields Jinlin Xue1,a and Tony E.Grift2,b 1@illinois.edu Key words: Machine vision, Agricultural robot, Turning, Field of view Abstract. This article discusses the development of variable field of view (FOV) of camera to realize headland turning of an agricultural robot

306

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

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

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

307

An amorphous alloy core medium frequency magnetic-link for medium voltage photovoltaic inverters  

Science Journals Connector (OSTI)

The advanced magnetic materials with high saturation flux density and low specific core loss have led to the development of an efficient compact and lightweight multiple-input multiple-output medium frequency magnetic-link. It offers a new route to eliminate some critical limitations of recently proposed medium voltage photovoltaic inverters. In this paper a medium frequency magnetic-link is developed with Metglas amorphous alloy 2605S3A. The common magnetic-link generates isolated and balanced multiple DC supplies for all of the H-bridge inverter cells of the medium voltage inverter. The design and implementation of the prototype test platform and the experimental test results are analyzed and discussed. The medium frequency non-sinusoidal excitation electromagnetic characteristics of alloy 2605S3A are also compared with that of alloy 2605SA1. It is expected that the proposed new technology will have great potential for future renewable power generation systems and smart grid applications.

2014-01-01T23:59:59.000Z

308

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

309

Droop based control of parallel-connected single-phase inverters in D-Q rotating frame  

Science Journals Connector (OSTI)

In this paper, control of parallel single-phase inverters in Direct-Quadrature(DQ) rotating frame based on droop method is proposed. For each inverter, a secondary orthogonal imaginary circuit is created to provide the second phase required for the transformation; ...

Saeed Golestan; Mahmood Joorabian; Hasan Rastegar; Arman Roshan; Josep M. Guerrero

2009-02-01T23:59:59.000Z

310

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

311

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 University Boise, ID 83725, USA Abstract-This paper presents an inductorless cascaded H- bridge multilevel a bulky inductor. An inductorless cascaded H-bridge multilevel boost inverter for EV and HEV applications

Tolbert, Leon M.

312

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

SciTech Connect (OSTI)

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

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

2009-01-01T23:59:59.000Z

313

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

314

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

315

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.

316

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

317

Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by  

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

2: June 18, 2012 2: June 18, 2012 Days to Turn Trend by Vehicle Class to someone by E-mail Share Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by Vehicle Class on Facebook Tweet about Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by Vehicle Class on Twitter Bookmark Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by Vehicle Class on Google Bookmark Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by Vehicle Class on Delicious Rank Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by Vehicle Class on Digg Find More places to share Vehicle Technologies Office: Fact #732: June 18, 2012 Days to Turn Trend by Vehicle Class on AddThis.com... Fact #732: June 18, 2012

318

Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Great Smoky Mountains Great Smoky Mountains National Park Turns to Alternative Fuels to someone by E-mail Share Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to Alternative Fuels on Facebook Tweet about Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to Alternative Fuels on Twitter Bookmark Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to Alternative Fuels on Google Bookmark Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to Alternative Fuels on Delicious Rank Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to Alternative Fuels on Digg Find More places to share Alternative Fuels Data Center: Great Smoky Mountains National Park Turns to Alternative Fuels on AddThis.com...

319

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

320

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

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

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.

322

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.

323

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

324

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

325

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

326

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

327

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

328

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.

329

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

330

An Inverted-Pile Incinerator for Waste Disposal and Energy Production  

Science Journals Connector (OSTI)

Inverted-pile burning of waste wood, in which new fuel is added to the bottom of the burning pile, is efficient, smokeless, and low...x and N0x...emissions. A coincinerator/cogenerator based on this principle is ...

Jay Z. James

1985-01-01T23:59:59.000Z

331

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 thermocline. Watts (1975), in discussing IES data from MODE I, showed that changes in dynamic height can evolving since its initial development. The first multi- instrument deployment was in MODE I (Watts

Rhode Island, University of

332

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

333

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

334

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.

335

Radar and Lightning Observations of Normal and Inverted Polarity Multicellular Storms from STEPS  

E-Print Network [OSTI]

, as well as extraordinary total flash rates as high as 500 min 1 . The National Lightning Detection NetworkRadar and Lightning Observations of Normal and Inverted Polarity Multicellular Storms from STEPS received 11 July 2006, in final form 15 February 2007) ABSTRACT This study discusses radar and lightning

Rutledge, Steven

336

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

SciTech Connect (OSTI)

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

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

2009-01-01T23:59:59.000Z

337

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.

338

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

339

Inverted repeats in the promoter as an autoregulatory sequence for TcrX in Mycobacterium tuberculosis  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer The regulatory sequences recognized by TcrX have been identified. Black-Right-Pointing-Pointer The regulatory region comprises of inverted repeats segregated by 30 bp region. Black-Right-Pointing-Pointer The mode of binding of TcrX with regulatory sequence is unique. Black-Right-Pointing-Pointer In silico TcrX-DNA docked model binds one of the inverted repeats. Black-Right-Pointing-Pointer Both phosphorylated and unphosphorylated TcrX binds regulatory sequence in vitro. -- Abstract: TcrY, a histidine kinase, and TcrX, a response regulator, constitute a two-component system in Mycobacterium tuberculosis. tcrX, which is expressed during iron scarcity, is instrumental in the survival of iron-dependent M. tuberculosis. However, the regulator of tcrX/Y has not been fully characterized. Crosslinking studies of TcrX reveal that it can form oligomers in vitro. Electrophoretic mobility shift assays (EMSAs) show that TcrX recognizes two regions in the promoter that are comprised of inverted repeats separated by {approx}30 bp. The dimeric in silico model of TcrX predicts binding to one of these inverted repeat regions. Site-directed mutagenesis and radioactive phosphorylation indicate that D54 of TcrX is phosphorylated by H256 of TcrY. However, phosphorylated and unphosphorylated TcrX bind the regulatory sequence with equal efficiency, which was shown with an EMSA using the D54A TcrX mutant.

Bhattacharya, Monolekha [Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302 (India)] [Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302 (India); Das, Amit Kumar, E-mail: amitk@hijli.iitkgp.ernet.in [Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302 (India)

2011-11-11T23:59:59.000Z

340

Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic Current Filtering and  

E-Print Network [OSTI]

Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic Current-interfaced Distributed Generation (DG) units, which can autonomously share harmonic currents and resonance damping, such that harmonic resonances and voltage distortions can be damped. To autonomously share harmonic currents, a droop

Chen, Zhe

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

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.

342

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

343

Comparative Study of Power Factor Correction Converters For Single Phase Half-Bridge Inverters  

E-Print Network [OSTI]

, telecommunication systems and medical equipment to overcome disruptions in utility power such as outage, voltage sag are extremely sensitive to cost. On-line systems are preferred where a highly reliable un- interruptible powerComparative Study of Power Factor Correction Converters For Single Phase Half-Bridge Inverters Gui

Tolbert, Leon M.

344

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

345

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

346

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

347

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.

348

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

349

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

350

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.

351

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.

352

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.

353

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

354

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

355

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

356

How to Turn a Jaguar into a Titan | Department of Energy  

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

How to Turn a Jaguar into a Titan How to Turn a Jaguar into a Titan How to Turn a Jaguar into a Titan November 27, 2012 - 3:02pm Addthis Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What powers Titan? 299,008 processor cores 710 terabytes of memory 8.2 MW power usage How to Turn a Jaguar into a Titan It takes more than the side mural to turn the fastest supercomputer dedicated to Open Science into the fastest computer in the world. The same room and cabinets that held supercomputer Jaguar, now holds Titan. Storified by Energy Department · Tue, Nov 27 2012 12:07:29 How did Oak Ridge National Labs turn this world-class supercomputer into an even faster, more efficient supercomputer? Wikimedia It took a little more than changing the sticker. Wikimedia

357

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

358

Effect of Vibration on Imaging Quality of CCD during the CNC Lathe Turning  

Science Journals Connector (OSTI)

The CNC lathe will vibrate during turning if it ... freedom spring-mass-damper mechanical model of the CNC lathe is built. And, the corresponding...

Gang Zhao; Zhiping Deng; Shengjin Chen

2012-01-01T23:59:59.000Z

359

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

360

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

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

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

E-Print Network [OSTI]

Top 20 Energy-Saving Tips Heating 1. Turn the radiator off when you are out. 2. Close the window features on your computer to come on after 5/10 minutes. Screen savers do not save energy. 20. Switch off of using standby, we could save enough energy to power 2.7 million homes for a year. If we turned off

Brierley, Andrew

362

NASA Turns To Universities For Research In Space-Age Materials SPACE FORUMS  

E-Print Network [OSTI]

NASA Turns To Universities For Research In Space-Age Materials CHANNELS SPACE FORUMS SPACEDAILY TECH SPACE NASA Turns To Universities For Research In Space-Age Materials innovations as simple that can scale the canyons of Mars Chapel Hill - Sep 26, 2002 NASA has selected a consortium of research

Aksay, Ilhan A.

363

Automatic Page Turning for Musicians via Real-Time Machine Listening  

E-Print Network [OSTI]

Automatic Page Turning for Musicians via Real-Time Machine Listening Andreas Arzt(1), Gerhard.qidenus.com) has developed an electro-mechanical device that actually turns the pages of books, music scores, etc. via two physical `fingers' (see Fig. 5, center). The device is operated by the musician via a foot

Widmer, Gerhard

364

Abstract 2955: Trail-R2: A death receptor turns malignant upon nuclear localization  

Science Journals Connector (OSTI)

...Association for Cancer Research. 1 October 2014...Metabolism and Programmed Cell Death Proceedings...turns malignant upon nuclear localization Holger...Experimental Cancer Research, Kiel, Germany...turns malignant upon nuclear localization...Association for Cancer Research; 2014 Apr 5-9...

Holger Kalthoff; Verena Haselmann; Alexandra Kurz; Uwe Bertsch; Sebastian Huebner; Hendrik Fritsche; Charlotte Hauser; Christian Schem; Rob Tower; Thorsten Heilmann; Sanjay Tiwari; Claus C. Gler; and Anna Trauzold

2014-10-01T23:59:59.000Z

365

A Five-Leg Inverter for Driving a Traction Motor and a Compressor Motor  

SciTech Connect (OSTI)

This paper presents an integrated inverter for speed control of a traction motor and a compressor motor to reduce the compressor drive cost in EV/HEV applications. The inverter comprises five phase-legs; three of which are for control of a three-phase traction motor and the remaining two for a two-phase compressor motor with three terminals. The common terminal of the two-phase motor is tied to the neutral point of the three-phase traction motor to eliminate the requirement of a third phase leg. Further cost savings are made possible by sharing the switching devices, dc bus filter capacitors, gate drive power supplies, and control circuit. Simulation and experimental results are included to verify that speed control of the two motors is independent from each other.

Su, Gui-Jia [ORNL; Hsu, John S [ORNL

2006-01-01T23:59:59.000Z

366

Hybrid electrohydrodynamic atomization of nanostructured silver top contact for inverted organic solar cells  

Science Journals Connector (OSTI)

Abstract The present study is demonstrating the deposition of solution based nanostructured silver top electrode for inverted organic solar cells. The deposition of silver nanoparticles through hybrid electrohydrodynamic atomization (Hybrid-EHDA) is discussed in detail. The film thicknesses were varied with respect to spray times. The interface between the metal electrode and organic film was investigated using a focused ion beam analyzer. The sheet resistance of nanostructured silver film was reduced by increasing the film thickness. The lowest sheet resistance of silver film is ~0.07?/sq with a film thickness of 2.6m. The power conversion efficiency of fabricated devices was found to be influenced by the sheet resistance of silver film. The maximum power conversion efficiency (~2.44%) was observed at 0.07?/sq. Our results demonstrate that the Hybrid-EHDA will play a promising role in the fabrication of inverted organic solar cells using a solution based top electrode.

Junwoo Kim; Navaneethan Duraisamy; Taik-Min Lee; Inyoung Kim; Kyung-Hyun Choi

2014-01-01T23:59:59.000Z

367

Hybrid phase shifted carrier modulation fed five-phase multilevel inverter for multiphase induction motor drive  

Science Journals Connector (OSTI)

This paper proposes an energy efficient modulation scheme suitable for multilevel inverter fed five-phase induction motor. Five-phase multilevel inverter provides good quality five-phase variable voltage and variable frequency supply to five-phase induction motor, which ensure reduced torque ripple and improved drive efficiency. This modulation inherits the features of fundamental frequency modulation and phase shifted carrier modulation in power conversion and resolves the contradiction between high frequency and accuracy in a digital control scheme. Base modulator and hybrid formulation control algorithms are realised with TMS320F2407 DSP processor and Xilinx XC95108 CPLD controllers. The performance studies with induction motor are evaluated in terms of power loss, weighted total harmonic distortion and torque ripple. Selected simulation and experiment results are reported to verify and validate the effectiveness of the proposed technique.

C. Govindaraju

2013-01-01T23:59:59.000Z

368

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

369

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

370

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

371

A Comparison on PSO Variants in Calculating HEPWM Switching Angles for a Cascaded H-Bridge Multilevel Inverter  

Science Journals Connector (OSTI)

This paper presents a comparison study on the application of various PSO algorithms in calculating the Pulse Width Modulation (PWM) switching angles of a cascaded H-bridge multilevel inverter. It aims to investig...

Norkharziana Mohd Nayan; Naziha Ahmad Azli

2012-01-01T23:59:59.000Z

372

Modelling and Simulation of H-Bridge Topology for Z-Source Inverter Using Matlab/Simulink  

Science Journals Connector (OSTI)

This paper presents the modelling of H-bridge topology for Z-source inverter (ZSI) ... , and an additional mode when the same H-bridge topology is used as a ZSI have...

S. Sabareswar; S. Lenin Prakash

2013-01-01T23:59:59.000Z

373

Optimization of an Electron Transport Layer to Enhance the Power Conversion Efficiency of Flexible Inverted Organic Solar Cells  

Science Journals Connector (OSTI)

The photovoltaic (PV) performance of flexible inverted organic solar cells (IOSCs) with an active layer consisting...61-butlyric acid methyl ester was investigated by varying the thicknesses of ZnO seed layers an...

Kang Hyuck Lee; Brijesh Kumar; Hye-Jeong Park; Sang-Woo Kim

2010-12-01T23:59:59.000Z

374

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

375

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

376

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

377

Nonlinear Dynamics of a Flow-Focusing Bubble Generator: An Inverted Dripping Faucet  

Science Journals Connector (OSTI)

We describe the rich dynamic behaviorincluding period-doubling and period-halving bifurcations, intermittency, and chaosobserved in the breakup of an inviscid fluid in a coflowing, viscous liquid, both confined in a microfabricated flow-focusing geometry. Experimental observations support inertia-dominated dynamics of the interface, and suggest the possible similarity to the dynamics of a topologically inverted counterpart of this system, that is, a dripping faucet.

Piotr Garstecki; Michael J. Fuerstman; George M. Whitesides

2005-06-15T23:59:59.000Z

378

Turn Down the Temp, But Don't Let Your Pipes Freeze! | Department of Energy  

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

Turn Down the Temp, But Don't Let Your Pipes Freeze! Turn Down the Temp, But Don't Let Your Pipes Freeze! Turn Down the Temp, But Don't Let Your Pipes Freeze! November 16, 2009 - 7:42pm Addthis Elizabeth Spencer Communicator, National Renewable Energy Laboratory I can be a strange and particular person at times. So here is a post wherein I will be strangely particular about setting the temperature on your thermostat. You often hear about how you should turn down the thermostat to save energy, and there are a slew of helpful ideas on the subject. I'm sure you've heard some of them right here on this blog: You can turn the thermostat down when you're out, when you're sleeping, and you can save about 1% on your energy bill per degree you turn your thermostat down! This is all very exciting. But before you go crazy with turning down the thermostat really low, I'd

379

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

380

Georgia County Turning Industrial and Farm Waste Into Big Energy Savings |  

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

Georgia County Turning Industrial and Farm Waste Into Big Energy Georgia County Turning Industrial and Farm Waste Into Big Energy Savings Georgia County Turning Industrial and Farm Waste Into Big Energy Savings March 30, 2011 - 2:44pm Addthis Interior view of the Gwinnett County "Gas To Energy" Project | Photo Courtesy of Gwinnett County, GA Interior view of the Gwinnett County "Gas To Energy" Project | Photo Courtesy of Gwinnett County, GA Tertia Speiser Project Officer, Golden Field Office What does this project do? Methane gas from biosolids, fats, oils, greases and other high strength industrial wastes is turned into energy. The county is improving efficiency and providing an alternative to clogging the sewers. The "Gas to Energy" system minimizes the impact of rising energy costs on consumers.

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

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

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

Turning Waste Into Fuel: How the INEOS Biorefinery Is Changing the 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 9, 2011 - 1:40pm Addthis Turning Waste Into Fuel: How the INEOS Biorefinery Is Changing the Clean Energy Game Paul Bryan Biomass Program Manager, Office of Energy Efficiency & Renewable Energy How does it work? Vegetative and agricultural waste reacts with oxygen to produce synthesis gas, which consists of hydrogen and carbon monoxide. The gas is cooled, cleaned, and fed to naturally occurring bacteria. The bacteria convert the gas into cellulosic ethanol, which is then purified to be used as a transportation fuel. Blueprints of the INEOS Biorefinery | Courtesy of INEOS Today marks the groundbreaking of INEOS Bio's Indian River Bioenergy

382

Georgia County Turning Industrial and Farm Waste Into Big Energy Savings |  

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

Georgia County Turning Industrial and Farm Waste Into Big Energy Georgia County Turning Industrial and Farm Waste Into Big Energy Savings Georgia County Turning Industrial and Farm Waste Into Big Energy Savings March 30, 2011 - 2:44pm Addthis Interior view of the Gwinnett County "Gas To Energy" Project | Photo Courtesy of Gwinnett County, GA Interior view of the Gwinnett County "Gas To Energy" Project | Photo Courtesy of Gwinnett County, GA Tertia Speiser Project Officer, Golden Field Office What does this project do? Methane gas from biosolids, fats, oils, greases and other high strength industrial wastes is turned into energy. The county is improving efficiency and providing an alternative to clogging the sewers. The "Gas to Energy" system minimizes the impact of rising energy costs on consumers.

383

Synthesis and biological properties of b-turned Ab3135 constrained analogues  

E-Print Network [OSTI]

Synthesis and biological properties of b-turned Ab31­35 constrained analogues M. Jesu´s Pe´rez de­35 has been prepared using solid phase synthesis protocols. The results of conformational studies

Pompeu Fabra, Universitat

384

E-Print Network 3.0 - academic training turns Sample Search Results  

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

if it leaves the station in the direction from where it entered... ;turning back trains, we show that the constraint graph is a permutation graph and hence it can be...

385

Method And Apparatus For Reducing Sample Dispersion In Turns And Junctions Of Micro-Channel Systems  

DOE Patents [OSTI]

What is disclosed pertains to improvement in the performance of microchannel devices by providing turns, wyes, tees, and other junctions that produce little dispersion of a sample as it traverses the turn or junction. The reduced dispersion results from contraction and expansion regions that reduce the cross-sectional area over some portion of the turn or junction. By carefully designing the geometries of these regions, sample dispersion in turns and junctions is reduced to levels comparable to the effects of ordinary diffusion. The low dispersion features are particularly suited for microfluidic devices and systems using either electromotive force, pressure, or combinations thereof as the principle of fluid transport. Such microfluidic devices and systems are useful for separation of components, sample transport, reaction, mixing, dilution or synthesis, or combinations thereof.

Griffiths, Stewart K. (Danville, CA), Nilson, Robert H. (Cardiff-by-the-Sea, CA)

2004-05-11T23:59:59.000Z

386

How to Turn Carbon into A Magnet? X-rays and Protons Give the...  

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

to Turn Carbon into A Magnet? X-rays and Protons Give the Answer Since antiquity, magnetism has appeared to be a trick performed only by iron, nickel, cobalt and a handful of rare...

387

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

388

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

389

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

390

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

391

Closed Loop Speed Control of Induction Generator with Scalar-control Inverters  

Science Journals Connector (OSTI)

Abstract A closed loop speed control for an induction generator is presented. The system was developed for a space vector modulation-voltage source inverter and the three-phase squirrel-cage induction generator to regulate speed and generator voltages with scalar control technique. The aim of this research was to a generated voltage with a constant speed at variable mechanical torque of prime mover. The simulation results show a good performance of the system can be achieved by the proposed speed controller.

Anaphat Upasan; Yuttana Kumsuwan

2013-01-01T23:59:59.000Z

392

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

393

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

394

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

395

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

396

Distributed voltage control strategy for LV networks with inverter-interfaced generators  

Science Journals Connector (OSTI)

Abstract Low voltage distribution networks are characterized by an ever growing diffusion of single and three phase distributed generators whose unregulated operation may deplete the power quality levels, in particular as regard voltage profiles and unbalances. This issue is at present under discussion by several national and international standardization bodies and the general trend is to require, for the new connections of generators to medium and low voltage grids, their participation to the reactive power network management. In this paper a novel strategy proposes to control the network voltage unbalance suitably for coordinating single and three-phase inverter interfaced embedded generators, concurrently with a local volt/var regulation action as foreseen by the new grid connection requirements. Simulations conducted on case study network representing a typical Italian 4-wire LV distribution system under different load/generation conditions, demonstrate that the coordinated action of single-phase and three-phase inverters may considerably reduce the degree of unbalance thus improving the network power quality levels.

R. Caldon; M. Coppo; R. Turri

2014-01-01T23:59:59.000Z

397

Theoretical analysis and experimental validation of a novel multilevel inverter topology for renewable energy interfacing applications  

Science Journals Connector (OSTI)

This paper presents a new topological structure for symmetrical cascaded multilevel inverters. The proposed circuit consists of cross-connected separate symmetrical DC sources which can generate number of levels equal to that of a cascaded H-bridge topology with reduced number of power switches. It is especially suitable for utility interfacing of renewable energy sources. It also offers the possibility of a transformer less and filter less operation. The working principle of the proposed topology is explained with the help of a single-phase five level inverter. Simulation results are obtained in matlab/simulink environment and are verified experimentally on a laboratory prototype. An exhaustive comparison of the proposed topology is made with the classical cascaded H-bridge topology especially with the considerations of conduction losses and cost-effectiveness. The proposed topology results in the reduction of number of power switches losses installation area and converter cost and thus can be implemented as an effective and efficient power electronicinterface for renewable sources of energy with the utility grid.

Krishna Kumar Gupta

2012-01-01T23:59:59.000Z

398

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

399

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

400

Geek-Up[08.20.10] -- Turning Trash Bags into Battery Anodes and Researching  

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

8.20.10] -- Turning Trash Bags into Battery Anodes and 8.20.10] -- Turning Trash Bags into Battery Anodes and Researching the Gut Microbiome Geek-Up[08.20.10] -- Turning Trash Bags into Battery Anodes and Researching the Gut Microbiome August 20, 2010 - 5:18pm Addthis Elizabeth Meckes Elizabeth Meckes Director of User Experience & Digital Technologies, Office of Public Affairs What are the key facts? An Argonne Scholar has figured out a way to convert grocery bags into carbon nanotubes that can be used as components for lithium-ion batteries. We have about three pounds of bacteria living in our gut -- most of which is helpful for our immune system development and metabolism. Scientists at Ames Laboratory are making batteries that are "greener" and more cost-efficient by using rare earth elements -- neodymium

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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

Commercial Ethanol Turns Dross to Dollars for Rural Iowans | Department of  

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

Commercial Ethanol Turns Dross to Dollars for Rural Iowans Commercial Ethanol Turns Dross to Dollars for Rural Iowans Commercial Ethanol Turns Dross to Dollars for Rural Iowans September 28, 2011 - 3:23pm Addthis American farmers harvest 80 million acres of corn each autumn. The corn stover usually left on a hewn field can be processed into a renewable transportation fuel called bioethanol. | Image courtesy of POET American farmers harvest 80 million acres of corn each autumn. The corn stover usually left on a hewn field can be processed into a renewable transportation fuel called bioethanol. | Image courtesy of POET Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What are the key facts? Farmers, truck operators, farm equipment distributors and agricultural laborers all benefit from the emerging bioethanol market in

402

Nashville Turns an Eyesore into an Energy-Efficient Asset | Department of  

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

Nashville Turns an Eyesore into an Energy-Efficient Asset Nashville Turns an Eyesore into an Energy-Efficient Asset Nashville Turns an Eyesore into an Energy-Efficient Asset September 19, 2012 - 10:43am Addthis The completed Nashville Bridge Company's building (called NABRICO for short) includes a geothermal heat pump system to keep public energy costs low. | Photo courtesy of David Powell, AIA. The completed Nashville Bridge Company's building (called NABRICO for short) includes a geothermal heat pump system to keep public energy costs low. | Photo courtesy of David Powell, AIA. Built in 1908, the NABRICO building was once a vital asset to Nashville's local economy. | Photo courtesy of Barry Griffith. Built in 1908, the NABRICO building was once a vital asset to Nashville's local economy. | Photo courtesy of Barry Griffith.

403

Energy Department Turns Up the Heat and Power on Industrial Energy  

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

Department Turns Up the Heat and Power on Industrial Energy Department Turns Up the Heat and Power on Industrial Energy Efficiency Energy Department Turns Up the Heat and Power on Industrial Energy Efficiency March 13, 2013 - 12:19pm Addthis Learn how combined heat and power could strengthen U.S. manufacturing competitiveness, lower energy consumption and reduce harmful emissions. | Infographic courtesy of Sarah Gerrity, Energy Department. Learn how combined heat and power could strengthen U.S. manufacturing competitiveness, lower energy consumption and reduce harmful emissions. | Infographic courtesy of Sarah Gerrity, Energy Department. Katrina Pielli Senior Policy Advisor, Office of Energy Efficiency and Renewable Energy What is Combined Heat and Power? Often called cogeneration or CHP, a combined heat and power system

404

Commercial Ethanol Turns Dross to Dollars for Rural Iowans | Department of  

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

Commercial Ethanol Turns Dross to Dollars for Rural Iowans Commercial Ethanol Turns Dross to Dollars for Rural Iowans Commercial Ethanol Turns Dross to Dollars for Rural Iowans September 28, 2011 - 3:23pm Addthis American farmers harvest 80 million acres of corn each autumn. The corn stover usually left on a hewn field can be processed into a renewable transportation fuel called bioethanol. | Image courtesy of POET American farmers harvest 80 million acres of corn each autumn. The corn stover usually left on a hewn field can be processed into a renewable transportation fuel called bioethanol. | Image courtesy of POET Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What are the key facts? Farmers, truck operators, farm equipment distributors and agricultural laborers all benefit from the emerging bioethanol market in

405

How Miami, Florida is Turning Waste Into Cash | Department of Energy  

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

How Miami, Florida is Turning Waste Into Cash How Miami, Florida is Turning Waste Into Cash How Miami, Florida is Turning Waste Into Cash April 7, 2011 - 3:43pm Addthis Miami-Dade officials talk about using EECBG grant funds for their Methane Sequestration Project. April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What does this project do? Methane gas captured from a landfill will provide 30 percent of the electricity used at an adjacent wastewater plant. The project will upgrade and expand the existing power generation system at the water plant. The county will increase the amount of self-generated electricity, and reduce the county's consumption of electricity generated from fossil fuels. In Miami, Florida, methane gas captured from a regional landfill will be used to provide 30 percent of the electricity used at an adjacent regional

406

60 Years Since Nuclear Turned on the Lights | Department of Energy  

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

60 Years Since Nuclear Turned on the Lights 60 Years Since Nuclear Turned on the Lights 60 Years Since Nuclear Turned on the Lights December 20, 2011 - 10:50am Addthis Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs "We have moved far to tame for peaceful uses the mighty forces unloosed when the atom was split." President Johnson, 1966 At 1:23pm on December 20, 1951, Argonne National Laboratory director Walter Zinn scribbled into his log book, "Electricity flows from atomic energy. Rough estimate indicates 45 kw." At that moment, scientists from Argonne and the National Reactor Testing Station, the forerunner to today's Idaho National Laboratory, watched four light bulbs glow, powered by the world's first nuclear reactor to generate electricity. Fifteen years later, in Arco, Idaho, President Johnson stood at this same

407

San Francisco Turns Up The Heat In Push To Eliminate Old Boilers |  

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

Francisco Turns Up The Heat In Push To Eliminate Old Boilers Francisco Turns Up The Heat In Push To Eliminate Old Boilers San Francisco Turns Up The Heat In Push To Eliminate Old Boilers February 8, 2011 - 5:37pm Addthis Before and after shots of a new boiler system | courtesy of the Office of Weatherization and Intergovernmental Programs Before and after shots of a new boiler system | courtesy of the Office of Weatherization and Intergovernmental Programs Johanna Sevier Project Officer, Golden Field Office San Francisco's extensive stock of multifamily properties is getting some critical assistance in replacing old and inefficient boilers with new, high-efficiency heating systems using Energy Efficiency and Conservation Block Grant (EECBG) funds. By providing financial incentives to property owners, new heating systems result in energy savings, job creation for

408

Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel |  

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

Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel July 22, 2010 - 12:01pm Addthis Daniel B. Poneman Daniel B. Poneman Deputy Secretary of Energy From the Manhattan Project to AT&T's Bell Laboratories, we've seen the transformative results that can happen when we bring together some of our best scientific minds. American innovation has solved some of the world's toughest problems and made our country a leader in the global economy. Today, we're looking to the past to help build a brighter future. We're bringing together some of our nation's top scientists and engineers to form multi-disciplinary, highly-collaborative research teams to achieve energy breakthroughs. That is the idea behind our new Energy Innovation Hubs. Today I have the

409

Winners of Hydrogen Student Design Contest Turn Urban Waste into Energy |  

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

Winners of Hydrogen Student Design Contest Turn Urban Waste into Winners of Hydrogen Student Design Contest Turn Urban Waste into Energy Winners of Hydrogen Student Design Contest Turn Urban Waste into Energy September 20, 2012 - 1:10pm Addthis The University of Maryland team accepted the award for the best combined heat, hydrogen, and power system design at the World Hydrogen Energy Conference (WHEC) in Toronto. | Photo courtesy of Jennie Moton. The University of Maryland team accepted the award for the best combined heat, hydrogen, and power system design at the World Hydrogen Energy Conference (WHEC) in Toronto. | Photo courtesy of Jennie Moton. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs What does this project do? The Maryland team's CHHP design produces 1.2 MW of electricity and

410

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

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

BPA Turns 75: A Look Back and a Look Ahead BPA Turns 75: A Look Back and a Look Ahead BPA Turns 75: A Look Back and a Look Ahead September 28, 2012 - 11:59am Addthis To commemorate what BPA considers a 75-year partnership with the Columbia River, which is the cornerstone of BPA's relationship with the people and utilities of the Northwest, BPA releases the first video of a series detailing its history. Teresa Waugh Public Affairs Specialist, Bonneville Power Administration What is BPA? BPA markets wholesale electrical power from 31 federal hydro projects in the Columbia River Basin in the Pacific Northwest. BPA's service territory includes Idaho, Oregon, Washington, western Montana and small parts of eastern Montana, California, Nevada, Utah and Wyoming. Seventy five years ago last month, Franklin D. Roosevelt signed the

411

Winners of Hydrogen Student Design Contest Turn Urban Waste into Energy |  

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

Winners of Hydrogen Student Design Contest Turn Urban Waste into Winners of Hydrogen Student Design Contest Turn Urban Waste into Energy Winners of Hydrogen Student Design Contest Turn Urban Waste into Energy September 20, 2012 - 1:10pm Addthis The University of Maryland team accepted the award for the best combined heat, hydrogen, and power system design at the World Hydrogen Energy Conference (WHEC) in Toronto. | Photo courtesy of Jennie Moton. The University of Maryland team accepted the award for the best combined heat, hydrogen, and power system design at the World Hydrogen Energy Conference (WHEC) in Toronto. | Photo courtesy of Jennie Moton. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs What does this project do? The Maryland team's CHHP design produces 1.2 MW of electricity and

412

Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel |  

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

Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel Energy Innovation Hubs and the Quest to Turn Sunlight Into Fuel July 22, 2010 - 12:01pm Addthis Daniel B. Poneman Daniel B. Poneman Deputy Secretary of Energy From the Manhattan Project to AT&T's Bell Laboratories, we've seen the transformative results that can happen when we bring together some of our best scientific minds. American innovation has solved some of the world's toughest problems and made our country a leader in the global economy. Today, we're looking to the past to help build a brighter future. We're bringing together some of our nation's top scientists and engineers to form multi-disciplinary, highly-collaborative research teams to achieve energy breakthroughs. That is the idea behind our new Energy Innovation Hubs. Today I have the

413

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

414

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.

415

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

416

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

417

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 $5,340...

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

1996-01-01T23:59:59.000Z

418

Draft!07"18"2011! 1 Turning the Tide on Outages1  

E-Print Network [OSTI]

! Draft!07"18"2011! 1 Turning the Tide on Outages1 What are the true costs of implementing!data!for!the!U.S.,!which!are!generally!available!from! several!sources,!including!from!the!U.S.!DOE's!Energy!University!of!Minnesota,!he!directed!all!Infrastructure!Security,!Grid! Operations/Planning,!and!Energy!Ma

Amin, S. Massoud

419

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

420

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

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

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 for the purpose of economic development. The aim of this project is to show how wind energy projects on tribal

Kammen, Daniel M.

422

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

E-Print Network [OSTI]

demagnetizing the permanent magnets. I. INTRODUCTION In case of a short circuit, there is a risk of irreversibly de- magnetizing (parts of) the permanent magnets of a motor, due to the strong opposing magnetic for an inverter-fed perma- nent magnet synchronous motor (PMSM) with buried mag- nets. The fault conditions

Jantsch, Axel

423

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

424

Tips for writing well on the Web 1. Write in the inverted pyramid style. Present the most important messages first  

E-Print Network [OSTI]

Tips for writing well on the Web 1. Write in the inverted pyramid style. Present the most important messages first (including your conclusion) and put the rest of the information below. 2. Web content should audience 4. Use the Web to your benefit by layering information on more than one page. Use links to other

Oyet, Alwell

425

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)

426

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.

427

A RESONANT INVERTER AS A CONTROLLED REACTANCE Yefim Berkovich1, Gregory Ivensky2, and Sam Ben-Yaakov2*  

E-Print Network [OSTI]

A RESONANT INVERTER AS A CONTROLLED REACTANCE Yefim Berkovich1, Gregory Ivensky2, and Sam Ben: +972-3-5026643, Email: lili_g@barley.cteh.ac.il 2 Power Electronics Laboratory, Dept. of Electrical-7-6461561, Fax: +972-7-6472949, Email: sby@bguee.ee.bgu.ac.il, Web: http:/www.ee.bgu.ac.il/~pel. Abstract - A new

428

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.

429

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

430

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

431

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

432

Optimized switching scheme of cascaded H-bridge multilevel inverter using PSO  

Science Journals Connector (OSTI)

Abstract The paper uses particle swarm optimization (PSO) to determine the optimum switching angles of cascaded H-bridge multilevel inverter (CH-MLI) so as to produce the required fundamental voltage and reduce the harmonic content. This is done by solving the transcendental equations characterizing the harmonic content. The validity of the proposed method is verified through simulation studies for three-phase, five-level CH-MLI. To compare the results obtained using PSO, the simulation studies have been extended for three-phase, five-level CH-MLI using sinusoidal pulse width modulation (SPWM). The results obtained using PSO are found superior as compared to SPWM in terms of total harmonic distortion at different modulation indices.

Vivek Kumar Gupta; R. Mahanty

2015-01-01T23:59:59.000Z

433

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

434

Stabilising the triple inverted pendulum by variable gain linear quadratic regulator  

Science Journals Connector (OSTI)

A variable gain linear quadratic regulator (VGLQR) for multivariable non-linear control systems is designed. This control scheme, which can be viewed as a novel gain scheduling controller, consists of linearising the non-linear system to a family of time-invariant systems about sampling points and using LQR method to obtain optimal feedback gain in every sampling interval. In addition, a fast algorithm based on Schur method for online solving the algebraic Riccati equation is discussed in detail, and a software package, which is used to solve algebraic Riccati equation at each sampling point, is developed during the present research. A triple inverted pendulum is stabilised by using the VGLQR method and the results of simulation and physical experiments are displayed. The results of experiments demonstrate that the present control scheme is of good stability and robustness.

Yongli Zhang; Zhihong Miao; Hongxing Li; Fuzhong Nian

2012-01-01T23:59:59.000Z

435

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

436

A wrong molecular turn leads down the path to type 2 diabetes | Argonne  

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

A wrong molecular turn leads down the path to type 2 diabetes A wrong molecular turn leads down the path to type 2 diabetes By Jen Salazar * December 20, 2013 Tweet EmailPrint Computing resources at the U.S. Department of Energy's (DOE) Argonne National Laboratory have helped researchers better grasp how proteins misfold to create the tissue-damaging structures that lead to type 2 diabetes. The structures, called amyloid fibrils, are also implicated in neurodegenerative conditions such as Alzheimer's and Parkinson's, and in prion diseases like Creutzfeldt-Jacob and mad cow disease. The results pinpoint a critical intermediate step in the chemical pathway that leads to amyloid fibril formation. With the new culprit in view, future work could target a possible treatment, such as designing an inhibitor to interfere with the harmful pathway. The results also helped

437

Mathematical modelling approach for determining optimal machining parameters in turning with computer numerical control (CNC) machines  

Science Journals Connector (OSTI)

Due to advancement in the manufacturing technology the application of computer numerical control (CNC) machines have increased manifolds. The determination of machining parameters for optimal results in machining is a part of computer aided process planning. In computer numerical control (CNC) machining, determining optimum or appropriate cutting parameters can minimise machining errors such as tool breakage, tool deflection and tool wear, thus yielding a high productivity or minimum cost. Different mathematical models have been proposed by various researchers in the past for the determination of optimal machining parameters. The present paper attempt's to review the literature regarding 'machining parameter optimisation' for turning operation in CNC machines. Diverse contributing and important factors in mathematical modelling like, the economic criteria's, single and multi-pass turning, optimisation techniques and practical constraints deployed have been considered. A detailed discussion is presented regarding the topic and in the end conclusions are drawn.

Bhaskar Naithani; Santram Chauhan

2012-01-01T23:59:59.000Z

438

Experimental Analysis of Work-piece's Diametrical Error in Ultrasonic-Vibration-Assisted Turning  

SciTech Connect (OSTI)

Vibration at an ultrasonic frequency is superimposed on the ordinary cutting motion in ultrasonic-vibration-assisted turning (UAT). This combinatory cutting motion results in reduction of the cutting force and surface roughness, and improvement of the dimensional tolerances compared with conventional turning (CT). The advantages obtainable from UAT has made this process suitable for machining hard-to-cut and brittle materials such as super-alloys and ceramics, as well as ordinary materials. The elastic deflection of work-pieces is primarily responsible for the diametrical errors of the machined parts. This is of course more obvious for slender work-pieces. The influence of UAT process on the diametrical error has not yet been investigated. This has been partly undertaken by the authors of the present paper. It has been experimentally illustrated in this paper that ultrasonic vibration superimposed on the tool tip can result in reduction of the diametrical error and thus reduced scrap rate is ensued.

Soleimanimehr, H.; Nategh, M. J.; Gholamzadeh, B. [Tarbiat Modares University, Tehran (Iran, Islamic Republic of)

2011-01-17T23:59:59.000Z

439

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

440

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 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 March 16, 2011 - 4:55pm Addthis Ener-G-Rotors' 5kW prototype system | courtesy of Ener-G-Rotors Ener-G-Rotors' 5kW prototype system | courtesy of Ener-G-Rotors April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs If you've ever driven by an industrial plant, you've probably noticed big white plumes rising from the tops of the facilities. While it might look like smoke or pollution at first glance, most of the time those white plumes are comprised of steam and heat, or what Ener-G-Rotors CEO Michael Newell calls waste heat. Mike and the researchers of Ener-G-Rotors are finding ways to use this

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441

Has the turning point of China?s wind power industry really come?  

Science Journals Connector (OSTI)

Abstract China?s wind power industry experienced rapid growth before 2009. However, the growing rate slowed down and the problem of wind curtailment was serious recent years. This paper focuses on the analysis of the turning point of China?s wind power industry combing with life circle theory. With a panoramic view of status quo, based on the resource endowment, capacity development and future trends, we draw the following conclusions: (1) China?s potential wind power reserves are still rich and the development of wind power industry will sustain growth for some period in the future. (2) As for market structure aspect, oligopolistic characteristic of China?s wind power market is still obvious. The market share of China?s wind power generation is not very high enough in the total generation market. (3) Turning point of China?s wind power industry has not come yet and the slowing down of development speed at present is mainly caused by inappropriate government intervention. It is estimated the turning point of wind power industry will come around 2020.

Xin-gang Zhao; Yu-ang Wei; Ling-zhi Ren

2015-01-01T23:59:59.000Z

442

Capacity computations of right-turn-on-red using the Highway Capacity Manual  

SciTech Connect (OSTI)

Right-turn-on-red (RTOR) is a traffic control strategy at signalized intersections that allows vehicles to turn right during red phases provided they do not impede the vehicles and pedestrians in green phases. RTOR is primarily a delay and energy conservation measure. Several studies that examined the impact of RTOR on vehicular delays have shown the potential of reducing fuel consumption by about 5 percent on urban streets. The reduction of delay and fuel consumption is related to extra capacity because RTOR allows vehicles to pass through an intersection in red phases. The extra capacity can be significant if an exclusive right-turn lane is provided. The 1985 {ital Highway Capacity Manual} (HCM) provides a powerful technique for evaluating how well an intersection will operate. This technique, however, is less successful in dealing with intersections where RTOR movement is permitted because it requires the analyst to supply RTOR volumes. This situation has led to a need for a formula to compute RTOR capacity. This paper proposes a method to calculate this capacity.

Luh, J.Z. (Langan Engineering Associates, NJ (US)); Lu, Y.J. (Concordia Univ., Loyola Campus, Montreal, PQ (Canada))

1990-04-01T23:59:59.000Z

443

High speed turning for hard material with PCBN inserts: tool wear analysis  

Science Journals Connector (OSTI)

Because of tool wear, High Speed Machining (HSM) is rarely used for hard turning process and the cutting speeds are generally selected around 100 or 200 m/min. In this work, HSM is performed for hard turning of a 50 HRC hardened steel (AISI 4140/42CrMo4) with a PCBN tool by using high cutting speeds (300 and 400 m/min). The results show that HSM for hard turning can be acceptable for industrial application by providing very good surface roughness and keeping significant tool life. A qualitative correlation is also presented between the crater wear and the temperature distribution at the tool-chip interface, predicted by a thermomechanical model. Flank wear, crater wear and surface roughness are examined in order to choose an appropriate wear criterion. Investigations by SEM/EDS and white light interferometry highlight the importance of crater wear and help us to better understand the role of chemical/diffusion phenomena in wear mechanisms.

Farouk Mahfoudi; Gautier List; Alain Molinari; Abdelhadi Moufki; Lakhdar Boulanouar

2008-01-01T23:59:59.000Z

444

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

445

Journal of Materials Processing Technology 189 (2007) 192198 Modelling of surface finish and tool flank wear in turning  

E-Print Network [OSTI]

flank wear in turning of AISI D2 steel with ceramic wiper inserts Tugrul ¨Ozela,, Yigit Karpata, Lu, Piscataway, NJ 08854, USA b Department of Mechanical Engineering, University of Aveiro, Campus Santiago, 3810 processes. Surface finishing and tool flank wear have been investigated in finish turning of AISI D2 steels

Ozel, Tugrul

446

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

SciTech Connect (OSTI)

This work approximates the selective harmonic elimination problem using artificial neural networks (ANNs) to generate the switching angles in an 11-level full-bridge cascade inverter powered by five varying dc input sources. Each of the five full bridges of the cascade inverter was connected to a separate 195-W solar panel. The angles were chosen such that the fundamental was kept constant and the low-order harmonics were minimized or eliminated. A nondeterministic method is used to solve the system for the angles and to obtain the data set for the ANN training. The method also provides a set of acceptable solutions in the space where solutions do not exist by analytical methods. The trained ANN is a suitable tool that brings a small generalization effect on the angles' precision and is able to perform in real time (50-/60-Hz time window).

Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Filho, Faete [ORNL; Cao, Yue [ORNL

2011-01-01T23:59:59.000Z

447

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

448

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

449

Solution Processed Al-Doped ZnO Nanoparticles/TiOx Composite for Highly Efficient Inverted Organic Solar Cells  

Science Journals Connector (OSTI)

Solution Processed Al-Doped ZnO Nanoparticles/TiOx Composite for Highly Efficient Inverted Organic Solar Cells ... This metal-oxide composition, called AZOTi, has two important elements that benefit production of low cost devices. ... After successful utilization of AZOTi in the fabrication of optimized single layer P3HT/PCBM-inverted solar cells, we also fabricated tandem cells comprising ITO/AZOTi/P3HT/PCBM in the front cell and a blend of a low band gap polymer [2,1,3-benzothiadiazole-4,7-diyl [4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b?]dithiophene-2,6-diyl

Abay Gadisa; Travis Hairfield; Leila Alibabaei; Carrie L. Donley; Edward T. Samulski; Rene Lopez

2013-08-27T23:59:59.000Z

450

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

451

An investigation of the quality of the output voltage, current, and energy relationships of independent inverters with transformers with a rotating magnetic field  

Science Journals Connector (OSTI)

It is analyzed how commutator circuits of independent inverters with transformers with rotating magnetic fields influence the quality of the output voltage and current. Based on a harmonic analysis of curve fo...

A. I. Cherevko; M. M. Muzyka

2009-02-01T23:59:59.000Z

452

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

453

Effective hole-injection layer for non-doped inverted top-emitting organic light-emitting devices  

Science Journals Connector (OSTI)

Non-doped inverted top-emitting organic light-emitting diode with high efficiency is demonstrated through employing an effective hole-injection layer composed of MoO"x. One reason for high efficiency lies on the energy-level matching between MoO"x and ... Keywords: 78.60.Fi, 82.45.Mp, 85.60.Jb, Hole-injection, ITEOLEDs, MoOx

Yanlong Meng; Wenfa Xie; Ning Zhang; Shufen Chen; Jiang Li; Wei Hu; Yi Zhao; Jingying Hou; Shiyong Liu

2008-05-01T23:59:59.000Z

454

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

455

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

456

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

457

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

458

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

459

Inverted end-Hall-type low-energy high-current gaseous ion source  

SciTech Connect (OSTI)

A novel approach to low-energy, high-current, gaseous ion beam generation was explored and an ion source based on this technique has been developed. The source utilizes a dc high-current (up to 20 A) gaseous discharge with electron injection into the region of ion generation. Compared to the conventional end-Hall ion source, the locations of the discharge anode and cathode are inverted: the cathode is placed inside the source and the anode outside, and correspondingly, the discharge current is in the opposite direction. The discharge operates in a diverging axial magnetic field, similar to the end-Hall source. Electron generation and injection is accomplished by using an additional arc discharge with a ''cold'' (filamentless) hollow cathode. Low plasma contamination is achieved by using a low discharge voltage (avoidance of sputtering), as well as by a special geometric configuration of the emitter discharge electrodes, thereby filtering (removing) the erosion products stemming from the emitter cathode. The device produces a dc ion flow with energy below 20 eV and current up to 2.5 A onto a collector of 500 cm{sup 2} at 25 cm from the source edge, at a pressure {>=}0.02 Pa and gas flow rate {>=}14 SCCM. The ion energy spread is 2 to 3 eV (rms). The source is characterized by high reliability, low maintenance, and long lifetime. The beam contains less than 0.1% of metallic ions. The specific electric energy consumption is 400 eV per ion registered at the collector. The source operates with noble gases, nitrogen, oxygen, and hydrocarbons. Utilizing biasing, it can be used for plasma sputtering, etching, and other ion technologies.

Oks, E. M.; Vizir, A. V.; Shandrikov, M. V.; Yushkov, G. Yu.; Grishin, D. M.; Anders, A.; Baldwin, D. A. [High Current Electronics Institute, Russian Academy of Sciences, Tomsk 634055 (Russian Federation); Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); 4Wave, Inc., Sterling, Virginia 20166 (United States)

2008-02-15T23:59:59.000Z

460

Under Pressure, Vanadium Won't Turn Down the Volume | Advanced Photon  

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

New Nanoscale Engineering Breakthrough Points to Hydrogen-Powered Vehicles New Nanoscale Engineering Breakthrough Points to Hydrogen-Powered Vehicles Patterning High-density Arrays of Nanospheres with Self Assembly Cells Forming Blood Vessels Send Their Copper to the Edge A Molecular Cause for One Form of Deafness Water Theory is Watertight Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Under Pressure, Vanadium Won't Turn Down the Volume MARCH 7, 2007 Bookmark and Share The upper panel is the diffraction pattern of vanadium recorded on an image plate at 18 GPa under hydrostatic conditions. The indexing is based on a body centered cubic lattice. The lower panel is the diffraction pattern of vanadium at 73 GPa. Inserts are zoomed images showing the splitting of 110,

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

Turning low solar heat gain windows into energy savers in winter  

SciTech Connect (OSTI)

The reduction in summer peak cooling loads of buildings with a large ratio of window to floor areas is often achieved by windows with a low solar heat gain coefficient (SHGC). These windows are typically double glazed with the exterior pane tinted or selectively absorbing. Absorbed solar radiation is rejected to the environment. This is undesirable in the cold season. The authors suggest that by turning south-facing windows by 180{degree} for the duration of the cold season, the solar heat gain of these windows can be increased significantly. By means of a computer simulation, they estimate seasonal energy savings for a model room in several climates. The effect of building heat capacity on the savings is also studied. Windows whose positions can be reversed for ease of cleaning are commercially available. This study shows that in a suitable climate the achievable savings easily compensate for the additional effort and possible investment over the lifetime of the window.

Feuermann, D.; Novoplansky, A. [Ben-Gurion Univ. of the Negev, Sede Boker (Israel). Jacob Blaustein Inst. for Desert Research

1996-10-01T23:59:59.000Z

462

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

463

DOE Joint Genome Institute: Advancing Next Gen Biofuels by Turning Up the  

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

October 2, 2011 October 2, 2011 Advancing Next Gen Biofuels by Turning Up the Heat on Biomass Pretreatment Processes WALNUT CREEK, Calif.-The nation's Renewable Fuels Standard calls for annual production of 36 billion gallons of biofuel by 2022. One of the biggest hurdles to achieving this goal lies in optimizing the multistep process involved in breaking down plant biomass and then converting it into fermentable sugars that can be refined into fuel for our transportation needs. To overcome this challenge, the U.S. Department of Energy supports several projects focused on identifying enzymes from fungi and microbes such as cellulases-that breakdown plant cell walls-and heat-tolerant industrial-strength host cell systems to drive these reactions. Photo: The thermophilic fungus M. thermophila

464

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

465

Pressure loss through sharp 180 deg turn in a relatively short two-pass smooth and rib-roughened channel  

Science Journals Connector (OSTI)

The local pressure distributions and resistance coefficients (f 1 andf 2) through the sharp 180 deg turn in a relatively short (L/D e=4) two-pass smooth and rib-roughened

C. Y. Zhao; W. Q. Tao

466

Estimated Savings from Turning Off Unnecessary Lights at the Langford Architecture Center During the 1996 Christmas Holidays  

E-Print Network [OSTI]

During the 1996 Christmas holidays the College of Architecture initiated a trial program to turn off unnecessary lights during unoccupied periods. This effort targeted the unnecessary lights in all studios, classrooms, labs and offices. Had those...

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

1997-01-01T23:59:59.000Z

467

Map 1: DIA to Fort Collins: Leave DIA and catch E470 North (signposted to Fort Collins). Turn  

E-Print Network [OSTI]

AirportE470 Map 2: Exit I25 onto Prospect Street and head west. There Are traffic lights at the major and cross the railroad tracks. At next light (Center Ave) turn right And park on the first level

Vavylonis, Dimitrios

468

Turn-Key Open Source Software Solutions for Energy Management of Small to Medium Sized Buildings (DE-FOA-0000822)  

Broader source: Energy.gov [DOE]

Closed Total DOE Funding: $3 million This FOA seeks to develop a turn key Building Automation System using Open-Source software and architecture specifically tailored to small and medium buildings to advance opportunities for energy efficiency in this sector.

469

Development of an Ultra-High Performance Multi-Turn TOF-SIMS/SNMS System MULTUM-SIMS/SNMS  

Science Journals Connector (OSTI)

A new system incorporating a multi-turn time-of-flight secondary ion/sputtered neutral mass spectrometer (TOF-SIMS/SNMS) with laser post-ionization was designed ... greater than the values obtained in conventiona...

Shingo Ebata; Morio Ishihara

2013-02-01T23:59:59.000Z

470

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

471

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

472

Prediction of Cutting Forces Using ANNs Approach in Hard Turning of AISI 52100 steel  

SciTech Connect (OSTI)

In this study, artificial neural networks (ANNs) was used to predict cutting forces in the case of machining the hard turning of AISI 52100 bearing steel using cBN cutting tool. Cutting forces evolution is considered as the key factors which affect machining. Predicting cutting forces evolution allows optimizing machining by an adaptation of cutting conditions. In this context, it seems interesting to study the contribution that could have artificial neural networks (ANNs) on the machining forces prediction in both numerical and experiment studies. Feed-forward multi-layer neural networks trained by the error back-propagation (BP) algorithm are used. Levenberg-Marquardt (LM) optimization algorithm was used for finding out weights. The training of the network is carried out with experimental machining data.The input dataset used are cutting speed, feed rate, cutting depth and hardness of the material. The output dataset used are cutting forces (Ft-cutting force, Fa- feed force and Fr- radial force).Results of the neural networks approach, in comparison with experimental data are discussed in last part of this paper.

Makhfi, Souad [Laboratoire des Technologies Industrielles. Universite Ibn Khaldoun de Tiaret, B.P. 78, Tiaret 14000 (Algeria); Laboratoire des Technologies Innovantes E.A. 3899. I.U.T. GMP-Universite de Picardie Jules Verne, avenue des Facultes, Le Bailly, 80025 Amiens Cedex1 (France); Habak, Malek; Velasco, Raphael [Laboratoire des Technologies Innovantes E.A. 3899. I.U.T. GMP-Universite de Picardie Jules Verne, avenue des Facultes, Le Bailly, 80025 Amiens Cedex1 (France); Haddouche, Kamel; Vantomme, Pascal [Laboratoire des Technologies Industrielles. Universite Ibn Khaldoun de Tiaret, B.P. 78, Tiaret 14000 (Algeria)

2011-05-04T23:59:59.000Z

473

Turning green into gold: a framework for energy performance contracting (EPC) in China's real estate industry  

Science Journals Connector (OSTI)

Abstract There is a growing interest in a sustainable built environment and green technologies are gaining worldwide attention. However, implementing green technologies usually requires more investment than using traditional technologies and the payback period tends to be very long. In China, most developers sell their properties and subsequently transfer the ownership to customers. Hence, a crucial problem for promoting green construction is that developers cannot obtain economic profits (gold) from implementing green technologies. Meanwhile, other stakeholders, such as property management companies, are also hesitant to adopt green technologies because of the large investment involved and their lack of experience. To tackle this problem, an energy performance contracting (EPC) based framework is proposed, to turn green investment into gold benefit by careful sharing of the risks existed. The framework was developed by conducting a focus group meeting with three experienced representatives from developer, property management company and energy service company respectively. A real-life case study, which includes both energy efficient system retrofit and new construction, is used to estimate the costs and benefits involved to demonstrate and verify the conceptual framework. The results show that the proposed framework can support the application of green technologies in both types of projects. Economic benefits as well as environmental benefits can be gained for the project stakeholders and the whole society.

Xiaoling Zhang; Zezhou Wu; Yong Feng; Pengpeng Xu

2014-01-01T23:59:59.000Z

474

Inverted Attic Bulkhead for HVAC Ductwork, Roseville, California (Fact Sheet), Building America Case Study: Efficient Solutions for New and Existing Homes, Building Technologies Office (BTO)  

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

Inverted Attic Bulkhead for Inverted Attic Bulkhead for HVAC Ductwork Roseville, California PROJECT INFORMATION Project Name: Long-Term Monitoring of Occupied Test House Location: Roseville, CA Partners: K. Hovnanian® Homes®, www.khov.com IBACOS www.ibacos.com Building Component: Envelope, structural, HVAC ducts Construction: New Application: New; single and/or multifamily Year Tested: 2012 Applicable Climate Zone(s): Hot-dry climate PERFORMANCE DATA HERS Index: 52 Projected Energy Savings: 11 million Btu/year heating and cooling savings Projected Energy Cost Savings: $116/year Modifying the truss system of a new home to accommodate ductwork within an inverted insulated bulkhead along the attic floor can save energy by placing

475

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

476

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

477

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

478

West Bound I-90: Take Missoula's first exit onto Van Buren Street, turn left at the stop sign and merge into the right lane.  

E-Print Network [OSTI]

and merge into the right lane. 1. At the stop light, turn right onto Broadway Street. 2. Move down Arthur Street after the light. Watch the 25 mph speed limit. Turn left at the light on BeckwithWest Bound I-90: Take Missoula's first exit onto Van Buren Street, turn left at the stop sign

Vonessen, Nikolaus

479

I-95 traveling north or south Exit 47 to Route 34 west to Exit 1. Turn left onto Church Street South. 100 Church  

E-Print Network [OSTI]

two lights. At the third light, turn right onto Church St. South. 100 Church Street South. Pass hospital on your right and at the second light beyond York Street, turn right onto Church StreetI-95 traveling north or south Exit 47 to Route 34 west to Exit 1. Turn left onto Church Street

480

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

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

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

482

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

483

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

484

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

485

Why Doesn't That Traffic Signal Ever Turn Green? An evalua)on of roadway markings for cyclists  

E-Print Network [OSTI]

Why Doesn't That Traffic Signal Ever Turn Green? An evalua)on of roadway #12; S. Bussey ­ 11/08/2013 Where would you wait if driving a car Cases Case 3: "Green Backed" Stencil Case 2: Stencil and Sign Case 1: Stencil

Bertini, Robert L.

486

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

487

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)

488

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

489

Control of spontaneous emission of an inverted Y-type atomic system coupled by three coherent fields  

Science Journals Connector (OSTI)

We investigate the spontaneous emission from an inverted Y-type atomic system coupled by three coherent fields. We use the Schrdinger equation to calculate the probability amplitudes of the wave function of the system and derive an analytical expression of the spontaneous emission spectrum to trace the origin of the spectral features. Quantum interference effects, such as the spectral line narrowing, spectrum splitting, and dark resonance, are observed. The number of spectral components, the spectral linewidth, and relative heights can be very different depending on the physical parameters. A variety of spontaneous emission spectral features can be controlled by the amplitude of the coupling fields and the preparation of the initial quantum state of the atom. We propose an ultracold atomic R87b system for experimental observation.

Jianbing Qi

2009-10-21T23:59:59.000Z

490

An X-Ray Fluorescence Study on the Segregation of Cs and I in and Inverted Organic Solar Cell  

SciTech Connect (OSTI)

X-ray near-total-reflection fluorescence reveals that in multilayers of the inverted organic solar cell (ITO/CsI/P3HT:PCBM-based) Cs diffuses into the organic layer and iodide diffuses into the ITO. Laser ablation inductively coupled plasma mass spectrometry measurements, which integrate elemental concentration across the whole multilayer structure, indicate that the Cs:I ratio remains 1:1 confirming there is no loss of iodine from the sample. Iodide diffusion to the bulk ITO layer is also found in a similarly prepared ITO/NaI/P3HT:PCBM multilayer structure. Our results are consistent with recent XPS measurements which show that the Cs:I ratio at the ITO/CsI surface exceeds 8:1, and rationalize this observation.

Lindemann, William R. [Ames Laboratory; Xiao, Teng [Ames Laboratory; Wang, Wenjie [Ames Laboratory; Berry, Jonna E. [Ames Laboratory; Anderson, Nathaniel A. [Ames Laboratory; Houk, Robert S. [Ames Laboratory; Shinar, Ruth [Ames Laboratory; Shinar, Joseph [Ames Laboratory; Vaknin, David [Ames Laboratory

2013-10-08T23:59:59.000Z

491

Solution-processed silver nanowires as a transparent conducting electrode for air-stable inverted organic solar cells  

Science Journals Connector (OSTI)

Abstract Highly efficient and air-stable inverted organic solar cells (IOSCs) were fabricated using solution-processed silver nanowire electrodes. The electrodes showed a low sheet resistance of ~16?sq?1 and a high transmittance of ~95% at a wavelength of 550nm. A solution-processed ZnO buffer layer is typically used for electron transport and effective passivation of the surface of Ag NW electrodes. The device performance of the \\{IOSCs\\} that used these Ag NW electrodes, which were fabricated on a glass or plastic substrate, was >94% of that of devices containing indium tin oxide (ITO) electrodes. This indicates that solution-processed Ag NW electrode can replace commercialized ITO and can be utilized in roll-to-roll and large-area fabrication processes.

Myungkwan Song; Jong-Kuk Kim; Shi-Young Yang; Jae-Wook Kang

2014-01-01T23:59:59.000Z

492

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

493

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

494

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;

495

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

496

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

497

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

498

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

499

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

500

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