Abstract
AbstractElectric vehicle wireless charging systems based on wireless power transmission technology (WPT) are superior to conventional charging systems requiring cables due to their compact structure, convenience and reliability since they’re free of plugs. However, the efficiency and safety of the wireless systems highly rely on the carefully designed match among the transmitter coils, receiver coils and cores, which can be severely spoiled under the interference of metallic foreign objects, which are not rare in garages, charging stations or other public places where the wireless charging systems are deployed. In this work, the interactions of the Electric vehicle wireless charging systems and metallic foreign objects are thoroughly investigated via full-wave numerical simulations based on the finite element methods. We illuminate that metallic foreign objects can increase the equivalent resistances, inductances as well as the losses of the charging systems, leading to serious efficiency and safety issues.KeywordsWireless power transmissionElectric vehicle wireless charging systemsMetallic foreign objectsNumerical simulations
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