New interleaved current-fed resonant converter with significantly reduced high current output filter for EV and HEV application

This paper proposes a new interleaved current-fed resonant converter with significantly reduced high current output filter which is suitable for EV and HEV applications. The proposed interleaved converter has theoretically zero output filter capacitance, low input current ripple, ZCS turn on and off for all switches and diodes and zero di/dt at turn off of diodes when operated at load independent points. A two-stage power conversion technique is applied for wide input and output voltage range operation of EV and HEV. A 2kW prototype of the proposed converter has been built and tested to verify the validity of the proposed operation.