Design Methodology of Bidirectional Resonant CLLC Converter with Dual Resonant Frequencies for Wide Voltage Range

Abstract

This paper proposes a design methodology of a bidirectional resonant CLLC converter with dual resonant frequencies for a wide voltage range. The proposed CLLC resonance parameter design method can improve the efficiency and control strategy of the converter by operating at the fixed two resonant frequencies according to the battery charging/discharging mode. A 3.6-kW experimental prototype is configured and evaluated to verify the proposed design method.