This chapter studies magnetic resonance based on wireless power transmission (WPT) system for electronic vehicle (EV). In this system, the two resonant coils mounted on the bottom of the vehicle and on the ground were simultaneously analyzed by the method of moments (MoM), an accurate and efficient full-wave electromagnetic analysis method. Then, compared with traditional WPT in ideal circumstance, the different performance of WPT in wireless charging system of EV is studied. Finally, a new design of the WPT integrated with circumstance is proposed, which achieves 90 % energy transmission efficiency at the resonant frequency of 13.56 MHz with the distance between two resonant coils varying within 15-25 cm.
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