Читать книгу Origin of Power Converters - Tsai-Fu Wu - Страница 10

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