Analysis of the Influence of Electric Shield on Space Magnetic Field in Electric Vehicle Wireless Charging System
Zhang Xian1, Wang Zhaohui1, Wei Bin2, Wang Songcen2, Yang Qingxin1
1. Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University Tianjin 300387 China; 2. China Electric Power Research Institute Beijing 100085 China
Abstract：In wireless power transmission system, in order to reduce the interference of external magnetic field on the charging device and improve efficiency of the whole system, an electric shield device is usually added to the primary side and secondary side equipment. In this paper, the finite element simulation model is established. The influence of electric shield on spatial magnetic field of the coupling mechanism and the efficiency of wireless power transmission system is analyzed. A 3D magnetic field measurement system was set up, and the 3D magnetic field distribution on the back of the primary and secondary equipment is measured and plotted. The results indicate that, electric shield can reduce the magnetic field near the primary and secondary equipment effectively, thereby preventing the magnetic field from spreading. The magnetic field distribution in finite element simulation is same as the measurement. The 3D magnetic field measurement system of wireless power transmission can display the distribution of spatial magnetic field intuitively, and plays an auxiliary role in design and development of the wireless power transmission device.
张献, 王朝晖, 魏斌, 王松岑, 杨庆新. 电动汽车无线充电系统中电屏蔽对空间磁场的影响分析[J]. 电工技术学报, 2019, 34(8): 1580-1588.
Zhang Xian, Wang Zhaohui, Wei Bin, Wang Songcen, Yang Qingxin. Analysis of the Influence of Electric Shield on Space Magnetic Field in Electric Vehicle Wireless Charging System. Transactions of China Electrotechnical Society, 2019, 34(8): 1580-1588.
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2019, Vol. 34 
