Novel AC–AC Converter Design for High-Efficiency Wireless Electric Vehicle Charging Systems

Abstract

Electric vehicle (EV) batteries may now be conveniently charged with wireless chargers. These systems are prized for their dependability and security in a range of weather scenarios. Generally speaking, there are two kinds of EV wireless charging systems: static (for parked cars) and dynamic (for moving cars). Traditionally, EV chargers have parts like a high-frequency direct current (DC)–alternating current (AC) converter that usually requires intricate cabling and an AC–DC converter that aids in power quality management. In these systems, a process called as “transformation” occurs when energy moves from a main component—the power source—to a secondary component—the vehicle’s receiver. Eliminating physical connections, such wires and charging outlets on the car, improves convenience and lessens wear and tear on the charger. This is another advantage of wireless chargers over plug-in varieties. In this study, we investigate a novel design that substitutes a single integrated AC–AC converter on the input side for the conventional AC–DC and DC–AC converters. This creative solution lowers the demand on power switches while raising voltage levels, which not only makes the system simpler but also more efficient. To further reduce the voltage stress on these switches, we additionally employ a multilevel diode clamp inverter, which not only helps to reduce the size of the switches but also greatly increases the efficiency of the system. To validate the performance of this new converter, we provide data from the laboratory as well as simulation results.