A bridgeless totem-pole interleaved PFC converter for plug-in electric vehicles

This paper proposes a bidirectional bridgeless totem-pole interleaved power-factor-correction (PFC) converter using SiC MOSFETs as the front-end stage of an onboard charger for plug-in electric vehicles (PEVs). The proposed converter provides bidirectional operation enabling both grid-to-vehicle (G2V) charging and vehicle-to-grid (V2G) ancillary services. The converter is suitable for efficient G2V V2G onboard charging due to its superiorities in terms of bidirectional operation, smaller current ripple, lower EMI, lower conduction losses and switching losses. A 3.3kW PFC converter is designed and developed, using Silicon-Carbide MOSFETs with fast recovery body diodes, for validation of and V2G operating modes. Utilizing SiC MOSFETs enables continuous current mode (CCM) operation of the totem-pole PFC converter in high-power applications. The converter is capable of converting 85Vac-265Vac line voltages into a regulated dc voltage in the range of 300V to 600V. The maximum efficiency of converter reaches up to 99.2% with 0.99 power factor.