基于磁能恢复开关补偿的电动汽车无线充电系统

Electric Vehicles Charging System Compensation Based on the Magnetic Energy Recovery Switch

为改善电动汽车无线充电系统的效率,该文首先对磁能恢复开关电路的数学模型进行了分析,确定了磁能恢复开关(MERS)电路可以等效为一个可变电容器;然后提出了可分离变压器双侧补偿的策略,并在双侧补偿的一次侧引入了MERS电路,并从数学上论证了该策略的可行性;最后在上述建立的模型基础上,提出一种计算两侧线圈互感的方法,根据互感M的大小,确定出MERS电路中移相角的大小,从而使无线充电系统工作在最佳状态。

To improve the efficiency of the electric vehicles charging system, the paper firstly describes the magnetic energy recovery switch circuit is analyzed, and the mathematical model to determine the magnetic energy recovery switch(MERS) circuit can be equivalent to a variable capacitor. Then put forward the strategy of the detachable transformer compensation on the both sides, the compensation MERS circuit is introduced in the bilateral primary side, and mathematically proved the feasibility of the strategy; Finally on the basis of the above model, putting forward a method of calculation on the both sides of the mutual inductance coil, determine the size of phase-shifting angle of the MERS circuit, thus make the wireless charging system work in the best state.