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

The Korean Institute of Power Electronics (전력전자학회)
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Digital Control Techniques for Bidirectional CRM Buck/Boost Converter

양방향 경계모드 벅/부스트 컨버터의 디지털 제어기법

  • Sang-Youn Lee (Dept. of Electrical Engineering, Myongji University) ;
  • Woo-Seok Lee (Dept. of Electrical Engineering, Myongji University) ;
  • Il-Oun Lee (Dept. of Electrical Engineering, Myongji University)
  • Received : 2022.08.26
  • Accepted : 2022.11.14
  • Published : 2023.02.20
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Abstract

This paper presents the digital control techniques of a bidirectional CRM(critical-conduction mode) buck(boost) converter, a dead-time design method that optimizes ZVS(zero-voltage switching) and valley-switching operation, and a switching-frequency limitation that ensures stable converter operation. To verify the feasibility of the design, a Si-MOSFET-based bidirectional CRM buck(boost) converter is built with 260-430 V input, 160-240 V output, and 1.0 kW rated capacity. The bidirectional CRM converter achieves an efficiency of up to 99.6% at buck mode and 98.7% at boost mode under rated load conditions.

Keywords

Acknowledgement

본 연구는 산업통상자원부와 한국산업기술평가관리원의 "자동차산업기술개발(그린카)(No. 20019073, 차량용 모듈러형 고집도 전력모듈 및 고전력밀도 전력변환 적용기술 개발)"의 지원을 받아 수행된 연구결과임.

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