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Error tracking mode AC current waveform control method for three-phase self-commutated voltage source power converters

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ELECTrICAL ENGINEErING IN JAPAN 1996年第5期117卷 95-109页

作者： Ohshima, M Tokyo Electric Power Co. Ltd. [?]Graduated from the Department of Electrical Engineering of the Faculty of Engineering University of Tokyo in March 1975. He joined Tokyo Electric Power Co. Ltd. in April of the same year. He was engaged in maintenance and inspection work of protective relays at Shinagawa and Ohi power stations from 1978 to 1980. After working on investigation of new technologies he was engaged in the research and development project of sodium sulfur battery systems for customers and networks. He is currently a Deputy Head of Power Electronics Department of Power Engineering R&D at Power Technology Center. He is a member of the IEEE EPE Association and Electrochemical Association.

A novel design theory for a three-phase self-commutated power conversion system (PCS) to perform as an ac current source is proposed. In this new ac current waveform control-method termed error tracking mode, the switching instructions of main devices are decided only by the error function of ac current at every data sampling time that comes in a constant period. The performance is theoretically evaluated. Simulation by SPICE also is executed and the characteristics are inspected. Error tracking mode has the following attractive features. It can treat two arbitrary current waveforms as target functions of two-phase arbitrary ac currents. The error between actual ac current value and the objective function value can be controlled and guaranteed to be less than an arbitrary value, which is given beforehand. All control components can be digitized. The minimum continuous on and off time of main devices is guaranteed in advance. No special starting control is necessary because actual ac currents are guaranteed to start tracking the target functions automatically. Error tracking mode makes contributions to improve precision in current control and to reduce current harmonics of self-commutated voltage source power converters.

关键词： three-phase ac-dc converter three-phase PCS PWM control dispersed power sources current regulation decoupled control

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Abstracts of papers presented at the 14th conference of the Weed Science Society of Israel Abstracts of papers presented at the international conference on controlled atmosphere and fumigation (CAF) in stored products Abstracts of papers presented at the joint international conference of FAOPMA — CEPA on pest control in the 21st century Abstracts of papers presented at the 2nd international Agro-Ecology Symposium on integrated pest management: from the drawing board to the market

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Phytoparasitica 1996年第3期24卷 199-265页

作者： E. Yogev M. Berson Y. Benyamini Y. Sheinboim T. Lev-ran A. Bahat Y. Barkai Y. Gatti M. Zaidan O. Barazani Y. Boshvize S. Graph U. Luchinsky T. Blumenfeld Y. Kleifeld G. Herzlinger H. Bucsbaum S. Golan T. Chilf r. Aly Y. Ohali A. Ovadia Y. Chachlon H. Yovel Y. Tesler G. Colodney A. Nir S. Zarka A. Tal B. rubin T. Yaacoby Y. Alon Y. Kedar Orit Ben-Zvi Assaraf O. Shainberg H. d. rabinowitch E. Tel-Or Y. Goldwasser d. M. Joel d. Plakhine V. Portnoy G. Tzuri N. Katzir dalia Losner-Goshen A. M. Mayer r. Jacobsohn Z. Tanaami H. Eisenberg Ziva Amsellem Z. Kernyi L. Hornok J. Gressel Adiva Shomer-Ilan Ela Nir daphna Michaeli V. Kampel A. Warshawsky M. Yogev M. Negbi J. Hershenhorn Y. Lavan T. Hilf M. Horowitz M. Cohen I. Hirsch A. Veneziani S. T. Conyers C. H. Bell Ana C. Sá-Fischer C. S. Adler Ch. reichmuth P. W. Flinn d. W. Hagstrum G. N. Mbata r. G. Winks Elisabeth A. Hyne M. Q. Chaudhry A. d. MacNicoll N. r. Price M. Schöller J. -F. dugast r. Plarre S. Navarro E. J. donahaye r. diaz Miriam rindner A. Azrieli P. Trematerra F. Fontana M. Mancini Ailsa d. Hocking Marta H. Taniwaki J. Lacey A. Hamer N. Magan N. Paster F. M. Caliboso d. G. Alvindia G. C. Sabio M. T. dela Cruz Okky Setyawati dharmaputra A. S. r. Putri M. Sidik Eleni Papademetriou A. Varnava C. Mouskos M. A. Malek B. Parveen K. A. dzisi W. O. Ellis Ana Maria Estevez Ljubica Galletti T. Fichet E. Oteiza L. A. Lizana M. X. Gonzalez B. Yakobson Y. Slavezky H. Ephrati El-H. Bartaly r. K. Kashyap M. Gupta W. L. Kashyap B. S. dahiya A. K. dash J. r. rangaswamy r. d. Shroff d. S. Jayas W. E. Muir N. d. G. White L Gaye Weller J. E. van S. Graver Wu-Kang Peng M. Bengston E. Alip C. reed J. G. Leesch G. F. Knapp G. F. russell L. B. Llewellin Ch. Ulrichs H. J. Banks P. C. Annis r. Allanson r. Tauscher K. Westphal S. Mohan M. Gopalan P. C. Sumdarababu V. V. Sree Narayanan Sabine Prozell G. Ziegleder B. Schartmann r. Matissek J. Kraus d. Gerard S. rogg W. raemann r. F. ryan Ya-Nan Wang r. T. Noyes P. Kenkel J. T. Criswell G. W. Cuperus C. J. Waterford C. P. Whittle L. Be Luxembourg Chemicals and Agriculture Ltd. Tel Aviv Israel Agrochemicals Dept. Milchan Bros. Ltd. Ramat Gan Israel Extension Service Ministry of Agriculture Zefat Mevo Hamma Ramat HaGolan Israel Dept. of Weed Science ARO Newe Ya’ar Research Center Haifa Israel Agrochemicals Department Milchan Bros. Ltd. Ramat Gan Israel Tarsis-Agrichem Tel Aviv Israel Weed Control Co. Ltd. Bet Dagan Israel Dept. of Field Crops Vegetables and Genetics The Hebrew University of Jerusalem Faculty of Agriculture Rehovot Israel Plant Protection and Inspection Services Ministry of Agriculture Bet Dagan 50250 Agan Chemical Manufacturers Ltd. Ashdod Israel Dept. of Field Crops Vegetables and Genetics Rehovot Dept. of Agricultural Botany The Hebrew University of Jerusalem Faculty of Agriculture Rehovot Israel Dept. of Weed Science ARO Newe Ya’ar Research Center Haifa Dept. of Botany The Hebrew University of Jerusalem Jerusalem Israel Dept. of Vegetable Crops ARO The Volcani Center Bet Dagan Israel Dept. of Plant Genetics Weizmann Institute of Science Rehovot Israel Inst. for Plant Science Agricultural Biotechnology Center Gödöllö Hungary Dept. of Botany Tel-Aviv University Tel Aviv Israel Dept. of Plant Genetics The Weizmann Institute of Science Rehovot Israel Dept. of Organic Chemistry The Weizmann Institute of Science Rehovot Israel Dept. of Ornamental Horticulture ARO The Volcani Center Bet Dagan Israel Weed Control Co. Ltd. Bet Dagan Chem-Nir Ltd. Kefar Shemaryahu Tiveon-Chem Co. Haifa Israel Central Science Laboratory Ministry of Agriculture Fisheries and Food Slough Berks UK Federal Biological Research Centre for Agriculture and Forestry Inst. for Stored Product Protection Berlin Germany USDA-ARS Grain Marketing and Production Research Center Manhattan USA School of Biological Sciences Abia State University Uturu Nigeria CSIRO Division of Entomology SCMC Nambour CSIRO Division of Entomology Canberra Australia DowElanco Europe Letcombe Laboratory L

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Hole transport in polysilanes with diverse side-chain substituents

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Philosophical Magazine B 1995年第6期71卷 1069-1081页

作者： T. dohmaru K. Oka T. Yajima M. Miyamoto Y. Nakayama T. Kawamura r. West Research Institute for Advanced Science and Technology University of Osaka Prefecture 1-2 Gakuencho Sakai Osaka 593 Japan College of Engineering University of Osaka Prefecture 1-1 Gakuencho Sakai Osaka 593 Japan Canon Inc. Ecology R&D Center Kizucho Sourakugun Kyoto 619-02 Japan College of Engineering University of Osaka Prefecture 1-1 Gakuencho Sakai Osaka 593 Japan Department of Chemistry University of Wisconsin Madison WI 53706 USA

The hole drift mobilities in polysilanes with diverse substituents and different molecular weights have been measured by the conventional time-of-flight technique. depending on the kind of substituents, hole drift mobilities varied by more than one order of magnitude; poly(?henyltrimethyldisilane) gave the highest room temperature hole drift mobility, 6·0 × 10−4cm2V−1s−1at a field of 2 × 105V cm−1, of all the polysilanes reported so *** electric field and temperature dependences of the hole drift mobilities in polysilanes were analysed in the framework of Gill's expression and Bässler's consideration. Polysilanes with an aromatic side group exhibited a zero-field activation energyE0ofca.0·35 eV compared toE0= 0·22-0·26 eV obtained for polysilanes with non-aromatic groups, while poly(phenyltrimethyldisilane), with one aromatic side group at every two Si atoms, manifestedE0= 0·26 eV, a value which may be categorized in the latter group with non-aromatic substituents. The effects of the substituents on drift mobility are further discussed in terms of the disorder in the energy and position of the hopping sites in the particular polysilanes.

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TrANSMISSION-LINE MOdELING OF THE CLASS-E AMPLIFIEr WITH AN ANALYTICAL METHOd

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INTErNATIONAL JOUrNAL OF NUMErICAL MOdELLING-ELECTrONIC NETWOrKS dEVICES ANd FIELdS 1995年第5期8卷 357-366页

作者： YAM, YO CHEUNG, CW LI, CH Department of Electronic Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Tong Hong Kong Yu On Yam (Yu-An Ren) graduated from the South China University of Technology Guanzhou china with B. Eng. (EE) and Ph.D. in engineering. he served in the Department of Microwave Electronics Research Institute of Electronics Academia Sinica Beijing China as researcher assoicate professor and full professor. He was awarded a gold medal by the State Commission of Science and Technology PR China in 1985 for his achievement in R&D works. He was also elected as fellow of CIE (the chinese Institute of Electronics). He served briefly in the Institut fur Hochfrequenztechnik TH Darmstadt and Alexander von Humboldt Stiftung of West Germany as a visting professor in 1980–82. In 1986 he returned to Hong Kong where he was born. He joined the Department of Electronic Engineering City University of Hong Kong (formerly known as City Polytechnic of Hong Kong) where he has been ever since. His research interests and publications are in the field of RF and microwave electronics RF circuit design and development and microwave communication engineering. Chi-Hung Li graduated with the B.Eng. (Hons) degree in electronic engineering from City Polytechnic of Hong Kong in 1991 and then the M.Phil. degree in electronic engineering from City University of Hong Kong in 1994. His research interests are RF circuit design simulation and mobile communication engineering.

The transmission line modelling (TLM) technique was used to simulate the class E power amplifier. An analytical method is also used to fix the required component values to ensure the desired output performance of the ... 详细信息

关键词： Transmission line theory

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PArALLEL ANd dISTrIBUTEd TLM COMPUTATION WITH SIGNAL-PrOCESSING FOr ELECTrOMAGNETIC-FIELd MOdELING

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INTErNATIONAL JOUrNAL OF NUMErICAL MOdELLING-ELECTrONIC NETWOrKS dEVICES ANd FIELdS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWArAPPA, C HOEFEr, WJr NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (dECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ArMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

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ZCS-ZVS mixed mode PWM resonant converter for snubber energy recovery of 3-level GTO inverter

ZCS-ZVS mixed mode PWM resonant converter for snubber energy...

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Annual IEEE Conference on Power Electronics Specialists (PESC)

作者： H.H. Seong d.J. Kim G.H. Cho Buchun R&D Center Samsung Electronics Company Limited Germany Department of Electrical Engineering Korea Advanced Institute of Science and Technology South Korea

In this paper, a new type of PWM series resonant converter is proposed. One pole of the proposed converter is switching at zero-current and the other is switching at zero-voltage. By introducing an auxiliary inductor, zero-voltage switching is possible even at no load. The proposed converter is suitable for a high-voltage dC/dC converter because the voltage stresses of switching devices are minimized.< >

关键词： Pulse width modulation Pulse width modulation converters resonance Snubbers Switching converters Inductors Zero voltage switching dC-dC power converters Stress

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THEOrETICAL ANd EXPErIMENTAL STUdIES OF ELECTrIC-FIELd-INdUCEd rEFrACTIVE-INdEX CHANGE IN QUANTUM-FILM, QUANTUM-WIrE, ANd QUANTUM-BOX STrUCTUrES

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MICrOWAVE ANd OPTICAL technology LETTErS 1994年第3期7卷 89-94页

作者： rAVIKUMAr, KG AIZAWA, T SHIMOMUrA, K KIKUGAWA, T ASAdA, M ArAI, S SUEMATSU, Y YAMAUCHI, r Optical Device Section Advanced Technology R&D Center Fujikura Ltd. 1440 Mutsuzaki Sakura Chiba 285 Japan Department of Electrical Engineering Sophia University Japan Anritsu Corp. Japan Tokyo Institute of Technology Japan

In this article we report theoretical as well as experimental studies of the electric-field-induced refractive index change in InGaAs/InP quantum-well structures, viz., quantum-film, quantum-wire, and quantum-box structures. The refractive index change, easily measured using a Mach-Zehnder interferometer setup, was around 1%, 4%, and 7% in quantum film, quantum wire, and quantum box, respectively, in the longer-wavelength region corresponding to the positive refractive index change peak. Moreover, we will discuss that the refractive index change dependency on the polarization of incident light in a quantum film can be controlled by introducing suitable tensile strain in it. It was found that for a well width of II nm, 0.3% tensile strain should be induced to obtain polarization-independent refractive index change. (C) 1994 John Wiley and Sons, Inc.

关键词： QUANTUM FILM QUANTUM WIrE QUANTUM BOX rEFrACTIVE INdEX CHANGE ELECTrIC FIELd

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robust control of an automatic transmission system for passenger vehicles

Robust control of an automatic transmission system for passe...

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IEEE Conference on Control technology and Applications (CCTA)

作者： Furukawa Hagiwara Fujita Uchida Tochigi R&d Center Honda Research and Development Company Limited Haga Tochigi Japan School of Information Science Japan Advanced Institute of Science and Technology Tatsunokuchi Ishikawa Japan Department of Electrical Engineering Waseda University Shinjuku Tokyo Japan

In recent years, electronic control of automatic transmissions, which provides an effective means of satisfying increasingly strict fuel efficiency requirements and improving drivability and shift quality, is applied to an increasing number of automobile models, and increasingly larger sections of automatic transmissions are electronically controlled. A new automatic transmission control theory which ensures high robustness and sufficient control performance has been developed through application of the H/sub /spl infin// control theory in order to make HONdA automatic transmissions more marketable. This paper reports that their control performance was favorable. This was verified by tests with actual vehicles, and the main processes to which it was applied.< >

关键词： robustness road vehicle control road vehicles H-infinity control

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Knowledge-based software components for qualitative measurement of dBMS

Knowledge-based software components for qualitative measurem...

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International Conference on Expert Systems for development

作者： Sang Hun Oh Yoon Joon Lee Myoung Ho Kim Software R&D Laboratories Hyundai Electronics Limited Ichon Kyunggi South Korea Computer Science Department Korea Advanced Institute of Science and Technology Taejon South Korea

ISBN: (纸本)0818657804

Qualitativeness of software is one of major problems for establishing its scientific measurement environment in which engineers can measure their products objectively and in an engineering way. To deal with the qualitativeness, automated tools are essential that integrate systems' expertise represented in the forms of software components. Therefore, after introducing our on-going researches to build a scientific measurement environment of database management systems, we present knowledge-based software components and their application to qualitative measurement. We also present the way to model the qualitative states of the components, together with four heuristics for selection of meaningful landmark values.< >

关键词： Software quality Software measurement Object oriented modeling database systems Software engineering Information processing Software testing research and development Computer science Software tools

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Software Quality Manager: a knowledge-based management tool of software metrics

Software Quality Manager: a knowledge-based management tool ...

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IEEE region 10 International Conference TENCON

作者： Sang Hun Oh Jong Yeon Lee Yoon Joon Lee Myoung Ho Kim Software R&D Laboratories Hyundai Electronics Industries Company Limited Incheon South Korea Department of Computer Science Korea Advanced Institute of Science and Technology Taejon South Korea

ISBN: (纸本)0780318625

The Software Quality Manager (SQM) aims at the construction of a software metrics evaluation environment in which the whole measurement process is performed via an engineering perspective. All the data, information and knowledge required for engineers during the process such as evaluation models and decision supporting knowledge is formally represented and managed to enhance consistency and to reduce misunderstanding. Concurrent measurement and analysis tasks occurring during the process are coordinated in SQM, in order to make the results significant. After defining the software metrics briefly, we present objectives and the three stage structure of SQM in detail. SQM supports qualitative/quantitative measurement techniques and is equipped with knowledge bases for software engineering and application domains. It also utilizes domain knowledge of applications in the form of software components. Finally, we present our ongoing efforts to make the method practical, including construction of two knowledge bases, integration of evaluation techniques, unified calibration units for software metrics, qualitative behavior generation techniques and so on.< >

关键词： Knowledge management Quality management Software quality Software metrics Engineering management Application software Environmental management Software measurement Performance evaluation data engineering

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