电动汽车无线充电系统中电屏蔽对空间磁场的影响分析  

Analysis of the Influence of Electric Shield on Space Magnetic Field in Electric Vehicle Wireless Charging System

作　　者：张献[1] 王朝晖 魏斌[2] 王松岑[2] 杨庆新[1] Zhang Xian;Wang Zhaohui;Wei Bin;Wang Songcen;Yang Qingxin(Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and EnergyTianjin Polytechnic University Tianjin 300387 China;China Electric Power Research Institute Beijing 100085 China)

机构地区：[1]天津工业大学天津市电工电能新技术重点实验室,天津300387 [2]中国电力科学研究院,北京100085

出　　处：《电工技术学报》2019年第8期1580-1588,共9页Transactions of China Electrotechnical Society

基　　金：国家电网公司总部科技项目"电动汽车无线充电系统电磁安全评价及测试方法研究";国家自然科学基金(51477117;51677132);天津市高等学校创新团队培养计划(TD13-5040)资助项目

摘　　要：在无线电能传输系统中,为了降低外界磁场对充电设备的干扰,提高整个系统的工作效率,通常在原边设备和副边设备中加入电屏蔽装置。该文建立有限元仿真模型,分析了电屏蔽对耦合机构周围空间磁场的影响。在实验中,搭建三维空间磁场测量系统,测量并绘制原边设备与副边设备背部三维磁场分布图。研究结果表明,电屏蔽有效地减少了原边设备与副边设备附近磁场的大小,起到了防止磁场扩散的作用。有限元仿真中的磁场分布情况与实际测量结果相同。该文中搭建的无线电能传输三维磁场测量系统能直观地显示空间磁场的分布情况,对无线电能传输装置设计和研发起到了辅助的作用。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.

关 键 词：无线电能传输 电屏蔽 三维磁场测量 平面耦合结构 

分 类 号：TM72[电气工程—电力系统及自动化] TM15