Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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Improved ZVT(Zero Voltage Transition) Boost Converter

개선된 ZVT 부스트 컨버터

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

In this paper, the improved zero-voltage transition(ZVT) PWM boost converter using an inductor feedback technique is proposed. The improved circuit uses a low-voltage zener diode to reduce the turn-off witching loss of the auxiliary witch and EMI noise. Using this technique, soft-witching for the auxiliary switch is guaranted at wide line and load ranges and some of the energy circulating in the auxiliary circuit is fed to the load Since the active switches are turned on and off softly, the witching losses and EMI noise are reduced significantly and the higher efficiency of the system is achieved. In this paper, the modes of converter operation are explained and analyzed, design guidelines are given, and experimental results of 1kW, 100kHz prototype system are presented.

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