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Zero-voltage and zero-current-switching full-bridge PWM converter using secondary active clamp

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3 Author(s)
Jung-Goo Cho ; Power Electron. Res. Div., Korea Electrotechnol. Res. Inst., Changwon, South Korea ; Chang-Yong Jeong ; Lee, F.C.Y.

A new zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) pulse width modulation (PWM) power converter is proposed to improve the performance of the previously presented ZVZCS FB PWM power converters. By adding a secondary active clamp and controlling the clamp switch moderately, ZVS (for leading-leg switches) and ZCS (for lagging-leg switches) are achieved without adding any lossy components or the saturable reactor. Many advantages, including simple circuit topology, high efficiency and low cost, make the new power converter attractive for high-voltage and high-power (>10 kW) applications. The principle of operation is explained and analyzed. The features and design considerations of the new power converter are also illustrated and verified on a 1.8 kW 100 kHz IGBT-based experimental circuit

Published in:

Power Electronics, IEEE Transactions on  (Volume:13 ,  Issue: 4 )

Date of Publication:

Jul 1998

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