Optimization of magnetic coupling structure of electric vehicle wireless charging DD coil

Zhiwei Chen, Zhengpan Wang, Shuiqing Xu, Anjiang Li, Qipei Zhou and Xiang Li

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 2, 151-169

Abstract: The charging coil plays an important role in the wireless charging system system. However, there are still some problems in the design of the wireless charging coil, such as the low coupling coefficient. In order to improve the coupling effect, this paper proposes an optimized design scheme for the metal shielding layer structure of DD coil. Firstly, the influence of the structure size of DD coil metal plate on the coupling coefficient is studied by the mathematical modeling analysis. Futhermore, the maxwell simulation is used to study the metal plate coupling coefficients with varying structure sizes, addressing receiving uniformity issues. The optimal size of the shielding layer is designed for optimal magnetic coupling in wireless charging. Finally, this paper validates the feasibility of the improved metal shielding layer through experiments. The research in this paper may have a reference role in the wireless charging system of electric vehicles.

Date: 2024
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DOI: 10.1080/09205071.2023.2285760

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