The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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An Interleaved PWM Buck Converter with a Soft Switching Auxiliary Circuit

소프트 스위칭 형태의 보조 회로를 이용한 인터리브드 벅 컨버터

  • Lee, Eui-Cheon (Dept. of Electronic & Telecommunication Engineering, Inje University) ;
  • Choi, Hyun-Chil (Dept. of Electronic Engineering, Inje University)
  • Received : 2013.08.22
  • Accepted : 2013.10.07
  • Published : 2013.12.20
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Abstract

This paper proposes the interleaved buck converter using a soft switching auxiliary circuit. In this scheme, an auxiliary circuit is added to the conventional interleaved buck converter and used to achieve soft-switching conditions for both the main switch and freewheeling diode. In addition, the switch in the auxiliary circuit operates under soft-switching conditions. Also, according to the input to output conditions, the main switch achieved zero-current-transition(ZCT) or zero-current & zero-voltage-transition(ZCZVT) at turn on. Thus, the proposed interleaved buck converter provides a higher efficiency. The basic operations, in this paper, are discussed and design guidelines are presented. The usefulness of the proposed converter is verified on a 200kHz, 180W prototype converter.

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References

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