Focusing on the tradeoff problem between the output power and transmission efficiency of magnetic coupling resonance wireless power transmission (MCRWPT) system, this paper firstly analyzes the series–series topology system by using the mutual inductance theory of concentrated parameters, and proposes the concept of power-efficiency composite function by using the method of normalization of output power and then the WPT system is assigned a weight factor. Based on that, the calculation expression of the optimal resonant frequency is obtained. The correctness of theoretical analysis is verified by simulation and experimental platform, which provides a useful reference for further improvement of power-efficiency synchronization and energy saving.

针对磁耦合共振无线电力传输（MCRWPT）系统的输出功率与传输效率之间的权衡问题，本文首先利用集中参数互感理论分析了串联-串联拓扑系统，提出了功率的概念。通过使用输出功率归一化方法实现高效率复合函数，然后为WPT系统分配权重因子。基于此，获得最佳谐振频率的计算表达式。仿真和实验平台验证了理论分析的正确性，为进一步提高电源效率同步和节能提供了有益的参考。