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This paper presents an integrated$LCC$compensation topology for electric vehicle/plug-in hybrid electric vehicle wireless chargers. The effect of the coupling between the additional coil and the main coil on the$LCC$compensation topology is studied. The proposed topology will reduce the size of the additional coil and make the system more compact with extremely high efficiency. The basic characteristics of the proposed topology are analyzed based on fundamental harmonic approximation. Furthermore, based on the steady-state model, three categories of operation modes are presented and analyzed. In order to realize zero-voltage switching, the series capacitorC₂on the secondary side is tuned. A numerical method is used to analyze the impact of different values ofΔ C₂on the turnoff current, and the best value ofC₂is chosen to build a prototype to verify the analysis.
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Li et al. (2014) studied this question.
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