Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

ZVS Resonant Energy Unbalance Problem & Solution of ZVS Full-bridge Converter

ZVS Full-bridge 컨버터의 ZVS 공진 에너지 불평형 문제와 해결 방법

  • Lee Dong-Youn (Power Electronics System Laboratory School of Electrical Engineering Seoul National University) ;
  • Lee Il-Oun (Power Electronics System Laboratory School of Electrical Engineering Seoul National University) ;
  • Cho Bo-Hyung (Power Electronics System Laboratory School of Electrical Engineering Seoul National University)
  • 이동영 (서울대학교 전기공학부 전력전자 시스템 연구실) ;
  • 이일운 (서울대학교 전기공학부 전력전자 시스템 연구실) ;
  • 조보형 (서울대학교 전기공학부 전력전자 시스템 연구실)
  • Published : 2001.07.01
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Abstract

ZVS Full-bridge converter is widely used in medium power level(1-3kW). ZVS can be designed within a limited load range and ZVS failure at light load condition is assumed to be acceptable within the given efficiency and thermal constraints. However, unbalanced ZVS resonant energy caused by dc blocking capacitor may alleviate the switching loss problem at light load condition. ZVS resonant energy is unbalanced by do blocking capacitor. This problem causes loss and heat concentration of a switch leg, In this paper, this problem is analyzed, and a novel control method is proposed to solve the problem.

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