Interoperability Study of Electric Vehicle Wireless Charging System Based on LCC-S Compensation Using Two Decoupled Unipolar Transmitting Coils

This letter presents a novel wireless power transfer (WPT) system for electric vehicles (EVs) that addresses interoperability issues among different coil types. The proposed solution utilizes two mutually decoupled unipolar transmitting coils with an inductor-capacitor-capacitor series compensation topology. By regulating the switching sequence of a dual-phase inverter, the current directions in the transmitting coils can be reconfigured to ensure compatibility with both unipolar and bipolar receiving coils. Additionally, a mode-switching strategy based on the proposed coil design enhances the robustness of the system against misalignment within its operational range. Experimental results validate the interoperability for unipolar and bipolar coils and demonstrate misalignment tolerance performance along specific directions.