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Active clamped two-switch forward converter with a soft switched synchronous rectifier

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2 Author(s)
Çoban, A. ; Electr. & Electron. Eng. Dept., Hacettepe Univ., Ankara, Turkey ; Çadirci, I.

The analysis, design and implementation of an active-clamped and zero voltage switching and two-switch forward converter (AC-TSFC) equipped with a soft switched synchronous rectifier are presented. AC-TSFC is proposed for maximising the power conversion efficiency of two-switch forward converters (TSFCs), used in relatively high input voltage, low output voltage and high output current dc-dc converter applications. Operation principles and design requirements of AC-TSFC are given in detail. A 100 W, 200 kHz AC-TSFC with an input voltage range of 160-400 V dc and an output voltage of 5 V dc is designed, and a prototype is built. The converter performance is compared with that of alternative TSFC schemes, in view of their overall power conversion efficiency. Experimental results obtained on the implemented converter are in a good agreement with the theoretical ones, and verify the satisfactory performance of the proposed AC-TSFC.

Published in:

Power Electronics, IET  (Volume:4 ,  Issue: 8 )