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

  • 제18권4호
  • /
  • Pages.312-321
  • /
  • 2013
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  • 1229-2214(pISSN)
  • /
  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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동기 정류기를 이용한 태양광 모듈용 플라이백 인버터 소프트 스위칭 제어 기법

Soft Switching Control Method for Photovoltaic AC Module Flyback Inverter using Synchronous Rectifier

  • Jang, Jin-Woo (College of Information and Communication Eng. Sungkyunkwan University) ;
  • Kim, Young-Ho (College of Information and Communication Eng. Sungkyunkwan University) ;
  • Choi, Bong-Yeon (College of Information and Communication Eng. Sungkyunkwan University) ;
  • Jung, Yong-Chae (Dept. of Electronic Eng., Namseoul University) ;
  • Won, Chung-Yuen (College of Information and Communication Eng. Sungkyunkwan University)
  • 투고 : 2012.11.09
  • 심사 : 2013.03.25
  • 발행 : 2013.08.20
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초록

In this paper, high efficiency control method for flyback inverter with synchronous rectifier(SR) based on photovoltaic AC modules is proposed. In this control method, the operation of SR is classified according to the voltage spike across main switch SP. When the voltage spike across SP is lower than the rating voltage of SP, the operation of active clamp circuit is interrupted for reducing the switching loss of auxiliary switch. In this time, the SR is operated for soft-switching of SP. When the voltage spike across Sp is higher than the rating voltage of SP, the operation of active circuit is activated for reducing the voltage spike. The SR is operated for reducing the conduction loss of secondary output diode. Thus, a switching loss of the main switch can be reduced in low power region, and weighted-efficiency can be improved. A theoretical analysis and the design principle of the proposed method are provided. And validity is confirmed through simulation and experimental results.

키워드

참고문헌

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