Multiport converter for fast charging of electrical vehicle battery: Focus on DC/AC converter

The availability of new electrical vehicle batteries with high current rating and capacity permits the realization of rapid charging. However, when using conventional methods, the charging process requires an expensive high-current grid interface. Therefore, a multiport converter with a stationary storage port to reduce the current required from the grid is proposed. The goal of this paper is to explore the fundamentals of the DC/AC converter used in one of the ports. Experimental results for a low-power prototype are shown to validate the theoretical study.