A novel wireless EV charger using SiC single-ended quasi-resonant inverter for home use

Electric Vehicles (EV) offer promise as an effective solution to environmental issues. One of the key technologies to their successful diffusion is the provision of adequate battery/capacitor charging infrastructure. In order to create a charging infrastructure by installing equipment in such as locations as carports in private homes, the inductive power transfer (IPT)-wireless battery charging system is very suitable. It is a promising system for wider diffusion because it is easy and safe to use for a broad range of users including the elderly. This paper presents a new system with the simplest components and low cost aiming at wide diffusion for home use. Proposed is a novel type of IPT-wireless EV charging system with an efficient and compact type single-ended load-resonant high-frequency inverter and DC-DC converter using SiC MOSFET. The single-ended high-frequency resonant inverter, which can operate under a self-excited ZVS control and a PFM power regulation scheme is evaluated from an experimental point of view. This system can supply a controlled charging current successfully with simple output stage. A feasibility study result is presented as a charging system for the commuter EV to demonstrate the viability of the proposed system.