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Soft switching active-clamped dual-series resonant converter

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3 Author(s)
B. R. Lin ; Department of Electrical Engineering, National Yunlin University of Science and Technology, Yunlin 640, Taiwan ; Y. S. Huang ; J. J. Chen

A soft switching active-clamp dual-series resonant converter is proposed here. Two small transformers are used in the proposed topology to provide more load power. An active-clamp circuit is used to absorb the energy stored in the leakage inductor of transformer, to clamp voltage stresses across switches and to realise the zero-voltage switching turn-on of switches in order to alleviate the switching losses. In order to remove the reverse-recovery problem on output diodes, the zero-current switching turn-off is realised by choosing the proper angle frequency on the secondary side. Analysis of mode operation, design considerations and experimental results of the proposed zero-voltage zero-current switching (ZVZCS) converter are described in detail. Finally, a 200 W ZVZCS prototype treated under Vin=48=V, Vo=200=V is implemented to verify the practicability of the proposed converter.

Published in:

IET Power Electronics  (Volume:3 ,  Issue: 5 )