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A High Efficiency Flyback Converter With New Active Clamp Technique

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4 Author(s)
Junming Zhang ; College of Electrical Engineering, Zhejiang University, Hangzhou, China ; Xiucheng Huang ; Xinke Wu ; Zhaoming Qian

This paper proposes a flyback converter with a new noncomplementary active clamp control method. With the proposed control method, the energy in the leakage inductance can be fully recycled. The soft switching can be achieved for the main switch and the absorbed leakage energy is transferred to the output and input side. Compared to the conventional active clamp technique, the proposed methods can achieve high efficiency both for heavy-load and light-load condition, and the efficiency is almost not affected by the leakage inductance. The detailed operation principle and design considerations are presented. Performance of the proposed circuit is validated by the experimental results from a 16 V/4 A prototype.

Published in:

IEEE Transactions on Power Electronics  (Volume:25 ,  Issue: 7 )