Abstract
This paper involves the comparison of the various topologies of 6.6kW onboard charger (OBC) which are used in electric vehicles. Since, the circuitry part of an OBC is divided into 2-stages; power factor correction (PFC) stage and DC-DC converter stage. Here three topologies have been discussed for both PFC and DC-DC converter. Under PFC part; Conventional boost PFC, interleaved boost PFC, and semi bridgeless PFC are discussed, and Under DC-DC converter; full-bridge converter, phase shift full-bridge converter, and series resonant converter are discussed. The selection procedure for selecting best topology among them is related to efficiency calculation for both PFC and DC-DC converter circuit. After that, a future technology is suggested i.e making an OBC having active PFC topology, to be compliant with Master Control Board (MCB) using Renesas RH850 E2M microcontroller that allows an automated communication among an Electric vehicle supply equipment (EVSE) and hardwares inside EV like OBC, DC-DC, Electronic control unit (ECU), Battery management system (BMS) etc using controller area network (CAN) communication protocols.
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