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

  • 제17권3호
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  • Pages.230-237
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  • 2012
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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직접전력변환 방식을 이용한 능동 클램프 AC-DC 컨버터

Active-Clamp AC-DC Converter with Direct Power Conversion

  • Cho, Yong-Won (Division of Electrical Eng., Pohang Univ. of science and technology) ;
  • Kwon, Bong-Hwan (Division of Electrical Eng., Pohang Univ. of science and technology)
  • 투고 : 2012.01.05
  • 심사 : 2012.03.16
  • 발행 : 2012.06.20
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초록

This paper proposes an active-clamp ac-dc converter with direct power conversion that has a simple structure and achieves high efficiency. The proposed converter is derived by integrating the step-down ac chopper and the output-voltage doubler. The proposed converter provides direct ac-dc conversion and dc output voltage without using any full-bridge diode rectifier. The step-down ac chopper using an active-clamp mechanism serves to clamp the voltage spike across the main switches and provides zero-voltage turn-on switching. The resonant-current path formed by the leakage inductance of the transformer and the resonant capacitor of the output-voltage doubler achieves the zero-current turn-off switching of the output diodes. The operation principle of the converter is analyzed and verified. A 500W prototype is implemented to show the performance of the proposed converter. The prototype provides maximum efficiency of 95.1% at the full load.

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참고문헌

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