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A Self-Driven Active Clamp Forward Converter Using the Auxiliary Winding of the Power Transformer  

이광운 (동아일렉콤 전원 연구소)
임범선 (동아일렉콤 전원 연구소)
김희준 (한양대학교 전자컴퓨터공학부)
Publication Information
Abstract
This study proposes a new self-driven active clamp forward converter eliminating the extra drive circuit for the active clamp switch. The converter used the auxiliary winding of the power transformer to drive the active clamp switch and a simple R-C circuit to get the dead time between the two switches. The operation principle was presented and experimental results were used to verify theoretical predictions. A 100-W (5V/20A) prototype converter built that only exhibited 1.5-turn winding number in the auxiliary winding was sufficient to drive the active clamp switch on the input of 50V. Finally, the measured efficiency of the converter was presented and the maximum efficiency of 91% was obtained.
Keywords
active clamp forward converter; active clamp switch; auxiliary winding; dead time;
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  • Reference
1 Y.S.Lee and B.T.Lin, 'Modeling, analysis, and design criteria of actively clamped double-ended converters,' IEEE Transaction on CAS, I : Fundamental Theory and Application, Vol.47, No.3, 2000, pp.312-323   DOI   ScienceOn
2 C.S.Leu, G.Hua, and F.C.Lee, 'Comparison of forward topologies with various reset schemes,' in proc. HFPC, 1991, pp.198-208
3 Q.Li, F.C. Lee and M.M.Jovanovic, 'Large-signal transient analysis of forward converter with active-clamp reset,' IEEE PESC Rec. 1988, pp.633-63   DOI
4 B.Carsten, 'Design techniques for transformer active reset circuit at high frequencies and power levels,' in Proc. HFPC, 1990, pp.235-246