电动汽车无线充电系统参数对耦合影响的研究

为提高电动汽车无线充电系统耦合能力以增强系统的传输效率, 总结了现有的无线电能传输(WPT: Wireless Power Transmission)方式, 分析了基于磁感应耦合电能传输(ICPT: Inductive Coupled Power Transfer)技 术的电动汽车无线充电系统的工作原理, 建立了带有磁芯的 ICPT 系统互感计算模型, 对系统互感与磁芯属性、 线圈属性、 轴偏移距离的关系以及不同结构松耦合变压器的磁屏蔽效果进行了仿真分析。 结果表明, 磁芯属性 对系统互感的影响有上限, 而线圈属性对系统互感的影响无上限, 发射端摆放条形磁芯且接收端摆放圆盘形磁 芯的 ICPT 系统能满足电动汽车无线充电系统的电源需求和电磁屏蔽要求。

Research on Impacts of Parameters of Electric Vehicles Involving Wireless Charging System on Coupling Ability

In order to improve the coupling capability of electric vehides involving wireless charging system to enhance the transmission efficiency of the system, we summarized the existing WPT(Wireless Power Transmission)modes, introduced the working principle of ICPT(Inductive Coupled Power Transfer)system, established the mutual inductance mathematical model of ICPT system with magnetic core, and analyzed the relationship among mutual inductance, property of magnetic core, property of coil, axis offset distance and magnetic shielding effect of loosely coupled transformer with different structures.The simulation results show that the influence of core attributes on mutual inductance is limited, the influence of coil property on mutual inductance has no upper limit,and the ICPT system with a magnetic stripe core at transmitter and a disk core at receiver can satisfy the power supply demand and the electromagnetic shielding requirement of electric charging system of electric vehicle.