Novel Control Strategy for a Bidirectional LCLC Converter with Resonant Boost Charging for Wide Varying Input Flow Battery

A hybrid control scheme in discharge mode and the resonant boost operation in charging mode is proposed for a bidirectional LCLC converter to meet desired steady state gain. During the charging mode, the converter operates with resonant boost mode. The converter is able to charge the battery to its maximum voltage with the proposed resonant boost operation ensuring soft switching for all primary and secondary MOSFETs. The converter operation is verified through simulation and experimentation. The obtained results are in good agreement with the theoretical analysis. Additionally, the discharge mode is tested with a built hardware prototype and 95.85% efficiency is observed at 500W load power.