This digest introduces a high-performance single-stage bidirectional impedance control network (ICN)-based ac-dc converter. ICN-based converters operate at constant switching frequency and comprise a differential resonant network to provide differential phase shift to maintain soft-switching over a broad range of operating conditions. The proposed bidirectional ac-dc converter has full soft-switching capability for wide input and output voltage, and power ranges. A generalized phase shift control methodology which enables soft switching, power factor correction (PFC), and output power regulation while allowing adjustable power factor in dc-ac mode is proposed. An auxiliary zero voltage switching-inductor (ZVS) inductor-based approach is presented to achieve soft-switching of all transistors without affecting PFC and soft switching properties of the conventional design. A universal input wide output voltage (200 V- 400 V), 3-kW onboard electric vehicle charger is designed, built, and tested to experimentally validate the proposed control and design methodologies. The prototype achieves soft switching of all high frequency transistors and achieves a peak efficiency of 93.5% at 1.7kW.
