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Maximum efficiency point tracking of the wireless power transfer system for the battery charging in electric vehicles

Recently the technology of WPT (Wireless Power Transfer) has received much attention on the new charging way of electric vehicle (EV). In the combination of the WPT and EV application, one of the key points is to keep the whole system operating under the high efficiency conditions. Considering the request of battery priority, this paper proposes a strategy of the maximum efficiency point tracking. The perturbation and observation method is used in this strategy to improve the efficiency of the whole system. Based on an actual WPT system in EV application, the strategy of maximum efficiency point tracking is implemented and tested in in Matlab/ Simulink, and the validity of this strategy is proved.