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A new ZVS phase-shifted PWM DC/DC converter with push-pull type synchronous rectifier

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2 Author(s)
Yingqi Zhang ; Dept. of Electr. & Comput. Eng., Queen''s Univ., Canada ; Sen, P.C.

A new ZVS phase-shifted PWM DC/DC converter with push-pull type synchronous rectifier is proposed. One half-bridge DC/AC inverter is cascaded with a push-pull type synchronous rectifier through an inductive link and a transformer. There is no inductor at the rectifier stage. In this converter, switching of the inverter is phase-shifted with respect to the synchronous rectifier. All switches have ZVS conditions. Constant switching frequency operation is achieved and all gate signals are 50% in duty cycle. The principles of operation of the converter are analyzed in detail. A prototype for 12 V/4 A operated at 200 kHz has been built. Experimental results are presented and they verify the analysis.

Published in:

Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on  (Volume:1 )

Date of Conference:

4-7 May 2003

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