Enhanced Self-Oscillating Wireless Electric Vehicle Charging Scheme

This article presents an SAE J2954 compliant self-oscillating wireless electric vehicle (EV) charging scheme. The proposed control scheme (implemented on the primary inverter) enables the overcurrent (OC)/overvoltage (OV) protection of the primary circuit and the regulation of the power supplied to the receiver without real-time communication. Concurrently, the inverter power switches operate in the zero current switching (ZCS) mode, regardless of the alignment conditions and component tolerance/deterioration. A thermal analysis has been conducted on PLECS, facilitating the evaluation of the inverter power losses and the comparison between the ZCS conditions deployed on the studied wireless power transfer (WPT) system and zero voltage switching (ZVS) operation, which is frequently used in such applications. The overall good performance of the proposed wireless charger is verified through extensive simulations, whereas its experimental validation is realized on a laboratory-scale hardware setup.