A Quasi Z-Source Inverter Based Single Stage Wireless Charger Integrating Solar Array and Auxiliary Battery

Abstract

Solar integration with electric vehicle battery chargers, especially wireless chargers, is still at a nascent stage. Topologies involving single stage topologies are desirable due to their improved efficiency and cost metrics. Potential performance benefits of such topologies are yet to be identified, and require analysis. Further, requisite energy balance mechanisms need to be addressed in order to fulfill load power requirements irrespective of the stochastic variations in solar power. Hence, in this paper, a novel topology is presented that integrates a solar array along with a battery storage system in a single stage wireless charging circuit. First, the operational methodology of the overall converter is explained in detail. Thereafter, key design considerations for feasible operation of the proposed topology are described. Finally, simulation results for a 2 kW (peak) 200 V electric vehicle battery charger system is shown to validate the findings, as well as the suitability of the proposed topology.