Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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A Primary-Side-Assisted Zero-Voltage and Zero-Current Switching Three-Level DC-DC Converter

  • Jeon S. J. (Dept. of Electronic Engineering Pukyong National University) ;
  • Canales F. (Center for Power Electronics System(CPES) Bradley Dept. of Electrical and Computer Engineering Virginia Polytechnic Institute and State University) ;
  • Barbosa P. M. (Center for Power Electronics System(CPES) Bradley Dept. of Electrical and Computer Engineering Virginia Polytechnic Institute and State University) ;
  • Lee F. C. (Center for Power Electronics System(CPES) Bradley Dept. of Electrical and Computer Engineering Virginia Polytechnic Institute and State University)
  • Published : 2001.10.01
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Abstract

A new primary-side-assisted zero-voltage and zero-current switching (ZVZCS) three-level DC-DC converter with flying capacitor is proposed. The three-level converters are promising in high voltage applications, and ZVZCS is a very effective means for reducing switching losses. The proposed DC-DC converter uses only one auxiliary transformer and two diodes to obtain ZCS for the inner leg. It has a simple and robust structure, and offers soft-switching capability even in short-switching conditions. The proposed converter was verified by experiments in a 6KW prototype designed for communication applications and operating at 100kHz.

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