Abstract
A hybrid zero-voltage and zero-current switching (ZVZCS) full-bridge dc/dc converter is proposed in this paper. The proposed converter retains the advantages of traditional phase-shift full-bridge (PSFB) converters such as soft-switching and fixed frequency. Besides, zero-voltage-switching (ZVS) for the leading-leg and zero-current switching (ZCS) for the lagging-leg can be achieved in a wide load range. The primary current can be decayed to zero in freewheeling interval that minimizes the duty-cycle loss and conduction loss. This paper introduces the circuit structure, operation principle of the proposed converter and the comparative analysis with traditional converter. The theoretical analysis of the proposed converter is verified by a 500W output prototype.
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