A combined traction drive and slow battery charger for plug-in hybrid Electric Vehicle application

In this document, we will present a three phase converter for Electric Vehicle (EV). First, the traction drive mode will be introduced, in order to show the chosen topology, which is a 3-phase 3-level NPC inverter. Then, the same converter is reused as an interleaved PWM rectifier for the battery slow charging mode (3,3kW). Of course, the charger is controlled in PFC in order to reduce current harmonics rejections, and to control different power exchange during the battery charging mode. For both structures, the design of the passive elements will be detailed and the high frequency currents will be considered for the design. An experimental test bench has been developed in order to validate the theoretical study.