A Novel Zero-voltage-switched Multi-resonant DC-DC Converter

This paper proposes a novel zero-voltage-switched multi-resonant DC-DC converter. With the resonance between the resonant inductor and the resonant capacitors paralleled with the main switch and rectifier diode, the proposed converter achieves zero-voltage-switching (ZVS) operation of the semiconductors. The resonance components absorb all parasitic components, including the transformer leakage inductance, switch output capacitance and diode junction capacitance. The topological modes, operation principles and dc characteristics are presented in detail. A prototype based on the proposed topology was built in the lab to verify the theoretical analysis.