Origin of Power Converters. Tsai-Fu Wu
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This edition first published 2020
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To Our FamiliesChing‐Ying, Charles and JerryYun‐Wen and Allen
Preface
This book is divided into two parts. Part I presents evolution and development of power converters from the original converter. Hundreds of power converter topologies have been developed over past one century by many researchers. However, there is no single systematic approach to developing the converters. Inspired by Charles Darwin who published the book entitled The Origin of Species and based on the principle of resonance, we identify the original converter, on which we develop the mechanisms of evolution, decoding, and synthesizing processes, to derive PWM power converters systematically. With the decoding process, the input‐to‐output transfer codes (ratios) are decoded into code configurations in terms of the transfer codes derived from the original converter. With the synthesizing process, we have developed the graft and layer schemes, which are used in growing plants, along with circuit fundamentals to synthesize the code configurations into converters. With these two processes, illustrations of the existing and newly developed hard‐switching and soft‐switching PWM converters, including the well‐known z‐source converters, Vienna converters, modular multilevel converters, switched‐inductor/switched‐capacitor converters, etc., are presented in detail. Additionally, determination of converters' switch‐voltage stresses based on their transfer codes is addressed. Moreover, based on the principle of resonance, the well‐known six PWM converters are reconfigured, and analogy of PWM converters to DNA is presented, from which mutation and replication of PWM converters are discussed.
Part II presents modeling and applications of power converters based on the original converter and the developed graft and layer schemes. The six PWM converters can be modeled into families represented in two‐port networks. Therefore, relationships among the converters can be identified and the modeling processes can be simplified. In addition, single‐stage converters to fulfill multiple functions are derived and modeled, on which two application examples are presented and verified with experimental results.
Since Charles Darwin in 1859 initiated an evolution principle, through around one hundred years and many researchers' study, Gregor J. Mendel developed the laws of inheritance in 1866, Boveri‐Sutton developed chromosome theory in 1902, and James D. Watson discovered the double‐helix structure of DNA in 1953, affecting significantly the followed genetic engineering innovations. Like Charles Darwin, we initiate an evolution of power converters, and we do expect other researchers can follow this stepstone to go further. This does not conclude the work, but just gets started.
Tsai‐Fu Wu
National Tsing Hua University, Taiwan, ROC
Yu‐Kai Chen
National Formosa University, Taiwan, ROC
Acknowledgments
This book collects most of our work in converter development and modeling over past 25 years. We are grateful to our former PhD and Master students who have contributed to this book, especially Dr Te‐Hung Yu and Dr Frank Liang. We are also thankful to the Ministry of Science and Technology, Taiwan, for constantly funding our research work. Our special appreciation goes to Cecilia Wang and Ya‐Fen Cheng who edit the book prudently to meet the requirements from Wiley Publisher.
Tsai‐Fu Wu
Yu‐Kai Chen
About the Authors
Tsai‐Fu Wu is a professor in the Department of Electrical Engineering at National Tsing Hua University, Taiwan, ROC where he is the director of Elegant Power Electronics Applied Research Lab (EPEARL). Since 1993, he has worked on more than 100 power electronics research projects sponsored by the Ministry of Science and Technology, ROC, and industry. He has published more than 300 referred journal and conference papers. Under his supervision, more than 30 PhD and 200 master students have graduated. His current research interests include development and modeling of power converters, design and development of Direct Digital Control with D–∑ processes for single‐phase and three‐phase converters with grid connection, rectification, APF, power balancing and UPS functions, and design of resonant converters for ultrasonic cutter, ozone generator, remote‐plasma‐source, and electrical surgery unit applications.
Yu‐Kai Chen is a professor in the Department of Aeronautical Engineering, National Formosa University, Taiwan, ROC where he is the director of Innovative Design and Energy Application Lab. (IDEAL). In 2015, he received the outstanding industry collaboration award from National Formosa University. His research interests include modeling and control of power converters, design of solar panel‐supplied inverters for grid connection, and DSP‐ and microprocessor‐based application systems with fuzzy and robust controls.