MCR-WPT负载对系统最优参数的影响

针对磁耦合谐振式无线电能传输(MCR-WPT)系统的参数优化问题，文章研究了系统最大传输功率条件下的负载(最大功率负载)对系统参数的影响。基于集总参数理论，推导了最大功率负载的表达式，分析了传输距离、耦合系数、系统频率等参数与最大功率负载的关系，获得了不同负载下的系统最优参数，并进行了电路仿真分析，搭建了两线圈结构无线电能传输实验平台。仿真及实验结果表明，系统最优参数与最大功率负载之间有一对一关系，系统最优耦合系数随最大功率负载的增大而增大，最佳传输距离随最大功率负载的增大而减小，因而可在不同负载条件下选择系统最优参数，保证能量的最大传输。

Effect of MCR-WPT Load on System Optimal Parameters

In order to solve the parameter optimization problem of the MCR-WPT, the paper studies the influence of the load under the maximum transmission power (maximum power load) on the system parameters. Based on the lumped parameter theory, a formula of the maximum power load was deduced, and the influence of transmission distance, coupling coefficient and system frequency on maximum power load were analyzed. Then the optimal system parameters under different loads were worked out. The circuit simulation and analysis were carried out, and a two-coil structure wireless power transfer experiment platform was built. Simulation and experimental results show that there is a one-to-one correspondence between different system optimal parameters and the maximum power load, the optimal system coupling coefficient increases with the rising of maximum power load and the optimal transmission distance decreases as maximum power load increases.Therefore, the optimal system parameters can be selected under different loads to ensure the maximum transmission of power.