Design and optimization of magnetic core structures for EV wireless charging systems

被引：0
作者：
Liu Z.-Z. [1 ]
Zeng H. [1 ]
Chen H.-X. [1 ]
Hei T. [1 ]
Zhou B. [1 ]
机构：
[1] School of Electrical Engineering, Shandong University, Jinan
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2018年 / 22卷 / 01期
关键词：
Coupling coefficient; Design and optimization; EV wireless charging; Magnetic core structures; Magnetic coupler;
D O I：
10.15938/j.emc.2018.01.002
中图分类号：
学科分类号：
摘要：
Aiming at the problem that low coupling coefficient of EV wireless charging system always leads to low charging efficiency, a method improving the coupling coefficient by design and optimization magnetic core was proposed. The equations about output power and efficiency were derived from the equivalent circuit, and the expressions about coupling coefficient were obtained by analyzing the equivalent magnetic circuit diagrams, which provide the basis for optimizing magnetic core structures for both single coil and double coil couplers. Then a process of design and optimization of magnetic cores was presented and following the process a wheel-shaped core structure was designed for circular coil and a concave core structure was proposed for Double-D(DD) coil. The 3D FEM simulation and experimental results show that the optimized core structure has a 10%~30% improvement in the coupling coefficient. Compared with the original charging system, charging efficiency of the wireless charging system using the optimized core structure is improved significantly. © 2018, Harbin University of Science and Technology Publication. All right reserved.
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页码：8 / 15
页数：7
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