Title :
A new ZVS phase-shifted PWM DC/DC converter with push-pull type synchronous rectifier
Author :
Zhang, Yingqi ; Sen, P.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Canada
Abstract :
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.
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; rectifiers; switching convertors; 12 V; 4 A; ZVS DC/DC converter; duty cycle; inductive link; one half-bridge DC/AC inverter; phase-shifted PWM; push-pull type synchronous rectifier; switching frequency operation; transformer; DC-DC power converters; Inductors; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Switches; Switching converters; Switching frequency; Zero voltage switching;
Conference_Titel :
Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on
Print_ISBN :
0-7803-7781-8
DOI :
10.1109/CCECE.2003.1226424
