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An Improved ZVS Active Clamp Forward Converter  

Choi Sun-Ho (동아일렉콤㈜)
Lee Hyun-Kwan (전주대 대학원 전기전자공학과)
Kim Eun-Soo (전주대 전기전자정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.10, no.3, 2005 , pp. 302-311 More about this Journal
Abstract
We propose an improved active forward converter by adding a non-dissipative snubber circuit to the secondary of the conventional active clamp forward converter in this paper. The snubber circuit is composed of a tapped inductor, a snubber capacitor, and two diodes. Comparing with the conventional one, the proposed one makes it possible ZVS to operate in a smaller magnetizing current condition. The operational principles and the equivalent mode analysis of an improved active forward converter are mentioned in this paper. In conclusion, we constructed the prototype of the modified active forward converter with 300W output capacity and verified higher efficiency compared to the conventional one.
Keywords
Active clamp forward converter; Non-dissipative snubber; ZVS; High efficiency;
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  • Reference
1 Q. Li, F. C. Lee: 'Design Consideration of the Active-Clamp Forward Converter with Current Mode Control during Large-Signal Transient', Applied Power Electronics Conference '2000, pp. 966-972
2 Q. Li, F. C. Lee, and M. M Jovanovic, 'Design Consideration of Transformer DC Bias of Forward Converter with Active-Clamp Reset', IEEE APEC, pp.553-559, 1999
3 최선호, 박진영, 김은수, '300W 평면변압기적용 포워드 컨버터', 전력전자학회논문지 제9권 6호, pp.560-567, 2004. 12
4 G.C. Hua, W.A. Tabise, C.S. Leu, N. Dai, R. Watson, F.C. Lee: 'Development of a DC Distributed Power System', Applied Power Electronics Conference '94, pp. 763-769
5 E.S Kim, B.Y Byun, Y.H Kim, Y.G Hong, 'A Three Level ZVZCS Phase-Shifted DC/DC Converter Using A Tapped Inductor And A Snubber Capacitor', APEC 2001. 3, pp. 980-985
6 S. Hamada, M. Michihira, M. Nakaoka, 'Using A Tapped Inductor for Reducing Conduction Losses in a Soft Switching PWM DC-DC converter', EPE, 1993, pp. 130-134
7 D. H. Park, H. j. Kim, and Y. S. Sun, 'A Development of the off-line Active Clamp ZVS Forward Converter for Telecommunication Applications', IEEE Intelec 1997, pp. 271-276