磁耦合谐振式无线电能传输系统建模与分析

Modeling and Analysis of Magnetically Coupled Resonators for Wireless Power Transfer

介绍了两线圈和四线圈谐振结构的无线电能传输系统。运用变压器的反射阻抗理论对这两种结构进行建模,并引入品质因数等参数对模型简化,利于分析系统效率和优化选择元件参数。最后搭建了一个谐振频率为10 MHz的实物模型,通过改变传输距离与负载电阻,得到不同情况下的系统效率,验证了理论分析的正确性。

This paper presented the two-coil and four-coil wireless power transfer system,respectively.The circuit models weren introduced using the reflected load theory which is commonly utilized in the analysis of transformers.To make it convenient to analyze the efficiency and easy to choose the optimal components parameters,these models are simplified by the quality factor.Finally,a physical model,of which the resonance frequency is 10 MHz,was established.The system efficiency under different conditions was obtained by changing the transfer distance and the load.Experiment proves the correctness of theoretical analysis.