A Soft Switched Boost Cascaded-by-Buck Power Factor Correction Converter for On-board Battery Charger Application

On-board battery chargers resolve the anxiety of frequent charging of the battery operated electric vehicles (BEVs) and plug-in hybrid electric vehicles (PHEVs) with an available household input supply. Conventionally, a two-stage converter connects the input grid supply to the battery pack whose voltage typically differs for various range of vehicle architectures. This paper mainly focuses on analysis and operation of a zero-current-switched (ZCS) boost cascaded by- buck converter employed in a power factor correction (PFC) application. A combination of resonant inductor and capacitor are used to create ZCS during turn-off of switch. In addition, the designed control loop structure provides the variable DC link output voltages at PFC with universal input voltages. It also provides smooth input current and maintains a power factor of 0.99. Finally, the simulation and experimental results of the proposed converter are performed and efficiency of 96.4% is achieved.