An integrated onboard charger and accessory power converter for plug-in electric vehicles

This paper presents an integrated onboard battery charger and accessory dc-dc converter for plug-in electric vehicles (PEVs). The integrated charger utilizes the already available traction drive inverters and motors in a PEV as the frond converter of the charger circuit and shares the high frequency transformer with the 14V accessory dc-dc converter for providing galvanic isolation. As a result, the integrated charger has lower cost, weight, and volume than a standalone charger. Experimental results on a 5 kW charger prototype are included to verify the topology.