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This is one of dreams to escape the huge economic crisis in near future
Akiteru Takagi,Ricky Mullis,Akira Yamamoto,Motohiro Kimura 한국재활복지공학회 2008 한국재활복지공학회 학술대회논문집 Vol.2008 No.11
We are confronted with huge and terrible economic crisis now. Then we must learn our world wide intellectual history. We think about one dream to rescue for our miserable near future economic crisis. Models are the New deal project by President Franklin T. Roosevelt and former Japanese Prime minister Kakuei Tanaka who has appeared The Project to remake all of Japanese islands.
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Education of Power Electronics in Japan
Mikihiko Matsul,Akiteru Ueda,Kuniomi Oguch 전력전자학회 2002 JOURNAL OF POWER ELECTRONICS Vol.2 No.4
Power electronics is an interdisciplinary area that is interstitial to all of the major disciplines of electrical engineering including power, electronics and control Today, the covering field of power electronics has more widely spread out with the help of ever evolving microelectronics and computer science Whereas, in Japan the tendency is becoming remarkable nowadays that science, especially "mathematics" and "hardware work", are falling into disfavor with the young people<br/> For these reasons, it has become a very important problem to find out "what are the truest essentials of power electronics?" and "How to give students incentives to learn power electronics?" from an educational point of view in under-graduate and graduate courses in universities. On the other hand, the power electronics engineers in companies are always required to comply with the ever changing trend of global and open market. However, it takes long time to cultivate their skills Against the background, "The Cooperative Research Committee on Education of Power Electronics" was established in the lEEJ Industry Applications Society during 2000-2001 The present status of the power electronics education in Japan is surveyed m this paper, and some problems with remedy are pointed out based on the discussions performed in the committee.
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Education of Power Electronics in Japan
Matsui, Mikihiko,Ueda, Akiteru,Oguch, Kuniomi The Korean Institute of Power Electronics 2002 JOURNAL OF POWER ELECTRONICS Vol.2 No.4
Power electronics is an interdisciplinary area that is interstitial to all of the major disciplines of electrical engineering including power, electronics and control. Today, the covering field of power electronics has more widely spread out with the help of ever evolving microelectronics and computer science. Whereas, in Japan the tendency is becoming remarkable nowadays that science, especially "mathematics" and "hardware work", are falling into disfavor with the young people. For these reasons, it has become a very important problem to find out "what are the truest essentials of power electronics\ulcorner" and "How to give students incentives to learn power electronics\ulcorner " from an educational point of view In under-graduate and graduate courses in universities. On the other hand, the power electronics engineers in companies are always required to comply with the ever changing trend of global and open market. However, it takes long time to cultivate their skills. Against the background, "The Cooperative Research Committee on Education of Power Electronics" was established in the IEEJ Industry Applications Society during 2000-2001. The present status of the power electronics education in Japan is surveyed in this paper, and some problems with remedy are pointed out based on the discussions performed in the committee.sed on the discussions performed in the committee.
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Analysis of High Frequency Voltage-Resonat Push-Pull Converter
Kenichi Onda,Takao Yaginuma,Yasuo Matsuda,Akiteru Ueda,Hitachi Ltd 전력전자학회 1989 ICPE(ISPE)논문집 Vol.- No.-
In a conventional analysis of a voltage-reso-nant push-pul] converter, resonant frequency and out-put voltage are obtained as constant, even if the out-put current of the converter changes. However, experi-mentally these values are known to vary with the out-put current. No qualitative or quantitative interpre-tation has been made on this point yet. This paper describes a new analysis of the converter, considering leakage inductance of a transformer. The variation is found to be caused by parasitic resonance which occurs between the leakage inductance of the transformer and the capacitance of the resonant capacitor. The new method allows the characteristics of the converter to be analyzed quantitatively. Then the varlation of the resonant frequency and the output voltage can be decreased through an increase of the coupling coefficient of the transformer or the resonant current of the converter. Furthermore, the generalized characteristics of the voltage-resonant push-pull converter can be derived from this analysis.
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A Design Strategy for the LCR Filter and Carrier Frequency in a Series Voltage Compensator
Nakata, Atsushi,Torii, Akihiro,Ueda, Akiteru The Korean Institute of Electrical Engineers 2013 The Journal of International Council on Electrical Vol.3 No.2
In this paper, we propose the LCR filter design method and the carrier frequency decision method in the series voltage compensator. In this proposed design method, the filter $L_f$ is calculated from the peak value of the ripple current, and the filter $C_f$ is calculated from the ripple voltage component. The damping resistance is calculated from the percentage of the elimination of the carrier frequency component and the settling time. We verify a model equipment in the experiment, and the experimental results agree well with the calculated design values.
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