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Zero-voltage zero-current switching full bridge PWM converter with reduced filter size

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3 Author(s)
In-Ho Cho ; KAIST, 335, Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea ; Duk-You Kim ; Gun-Woo Moon

An improved zero-voltage zero-current switching (ZVZCS) full bridge PWM converter is proposed in this paper. The proposed converter consists of two full bridge inverters in the primary side and two rectifiers in the secondary side and total power is equally distributed to each inverters and rectifiers. Also a primary current of transformer winding is naturally reset by input source. Therefore, zero-voltage switching for the leading leg switches and zero-current switching for the lagging leg switches are achieved without requiring any additional components and distributed total power increases reliability of the system. Furthermore, multi-level voltages shown at output filter reduce the filter size. The operational principle and analysis of the proposed converter are presented and verified by 700 W prototype.

Published in:

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Date of Conference:

May 30 2011-June 3 2011