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Interoperability Analysis of Compensation Network in Electric Vehicle Wireless Charging System

This paper presents a compensation network interoperability analysis for electric vehicle (EV) wireless charging system (WCS), as well as a compensation network interoperability evaluation method. Firstly, reflected impedances of WCS secondary sides are calculated, according to two typical compensation networks: series capacitor (SC) compensation and inductor-capacitor-capacitor (LCC) compensation. Then, an interoperability evaluation method is proposed, considering that system performance does not change much. Finally, an EV wireless charging prototype is developed, and experiments and simulations are conducted to verify the analysis and the proposed method. The results show that SC and LCC compensation networks have good interoperability on conditions that equivalent load resistance Re is close to optimal coil load resistance Ropt.