Implementation of high efficiency batteries charger for EV based on PWM rectifier

Abstract

This paper describes a power electronic system used to charge electric vehicle (EV) batteries. To achieve the requirements of high power factor and efficiency, two power converter units are adopted. The PWM rectifier with direct power control based on space vector PWM (DPC-SVM) in the front-end and full-bridge (FB) converter with phase-shifted zero-voltage zero-current-switching (ZVZCS) in the back-end are applied. Decoupling control for instantaneous active and reactive powers of the grid is realized. Experimental results in 8kW prototype show that during the whole charging process, the system efficiency is higher than 85.3% and the input power factor is higher than 99.4%.