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Novel zero-voltage and zero-current-switching full-bridge PWM converter using a simple auxiliary circuit

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4 Author(s)
Jung-Goo Cho ; Div. of Power Electron. Res., Korea Electrotechnol. Res. Inst., Changwon, South Korea ; Ju-Won Baek ; Chang-Yong Jeong ; Geun-Hie Rim

A novel zero-voltage and zero-current-switching (ZVZCS) full-bridge pulsewidth modulation converter is presented to simplify the circuits of the previously presented ZVSCS converters. A simple auxiliary circuit, which consists of one small capacitor and two small diodes, is added in the secondary to provide ZVZCS conditions to primary switches, as well as to clamp secondary rectifier voltage. The additional clamp circuit for the secondary rectifier is not necessary. The auxiliary circuit includes neither lossy components nor additional active switches, which makes the proposed converter efficient and cost effective. The principle of operation, features, and design considerations are illustrated and verified on a 2.5 kW 100 kHz insulated-gate-bipolar-transistor-based experimental circuit

Published in:

IEEE Transactions on Industry Applications  (Volume:35 ,  Issue: 1 )