电动汽车无线充电系统线圈参数的仿真与设计

Simulation and design of coil ′s parameter in wireless charge system for EV

磁耦合谐振式无线能量传输技术能实现中等距离的大功率高效率的能量传输,更加适用于电动汽车的无线充电。线圈作为该技术的核心部件,合理的线圈参数设计能够有效地提高系统的输出功率和传输效率。为此,首先介绍了该技术的工作原理并基于等效电路理论建模。其次描述了该技术在电动汽车无线充电中的应用。再次利用MATLAB仿真分析了线圈参数对系统传输性能的影响,得出结论:存在最佳匝数和平均半径使系统的输出功率和传输效率达到最大。随后对适用于电动汽车无线充电的线圈参数进行设计,设计的系统在传输距离为0.3 m时,输出功率为1.60 kW,传输效率可达到96%。最后通过Pspice仿真证明了参数设计的可行性。

Magnetically-coupled resonant wireless power transmission（MCR-WPT） technology has the advantage of mid-range, high- power and high efficiency, which makes it more suitable for electric vehicle （EV） wireless charge. The coil works as a core in this technology, whose proper parameters＇ design could effectively enhance output power and transmission efficiency. Firstly, the opera- tion principle of MCR-WPT is introduced and theoretical model is built based on equivalent circuit theory. Subsequently, the appli- cation of this technology in EV is described.Based on theoretical analysis, the relationships between coil＇s parameters and transmis- sion properties are investigated through MATLAB.We can extract a conclusion that there are optimal turns and average radius which make the output power and efficiency maximal. Besides the coil＇s parameters adjusted to EV＇ wireless charge are devised.The de- signed system could achieve that the power is 1.60 kilowatt and the efficiency is 96 percent approximately when the transmission distance is 0.3 meter. Then the feasibility of designed parameters are verified with the help of Pspice.