Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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A New Active Clamp Forward Converter Using Secondary Inductor Current Ripple for Improved ZVS Operation

  • Lee Sung-Sae (Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology) ;
  • Han Sang-Kyoo (Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology) ;
  • Moo Gun-Woo (Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology)
  • Published : 2004.07.01
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Abstract

A new asymmetrical zero voltage switching (ZVS) active clamp forward converter is proposed. Since the ripple current of secondary inductor plays a key role in the ZVS operation of main power switch, the proposed converter shows an excellent ZVS performance. The synchronous rectification is employed to reduce the rectification loss. The operational principle and ZVS analysis are presented. Experimental results demonstrate that the proposed converter can achieve an excellent ZVS performance throughout all load conditions and the significant improvement in the efficiency for the 100W(5V,20A) prototype converter.

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