磁耦合谐振式无线电能传输系统多负载特性研究

针对发射线圈面向两个平行的小型接收负载线圈电能传输情况进行研究,搭建带有频率跟踪装置的双线圈结构磁耦合谐振式无线电能传输装置平台,并在该平台上对单/双负载线圈的发射线圈间距离（以分米级为单位）与传输效率之间的关系进行实验.单负载实验结果与仿真结果吻合度很好,但实测效率普遍比仿真效率要差;多负载实验仿真模型能正确反映传输效率随线圈间距的变化情况,实际实验测量数据与仿真数据相吻合.表明,应用磁耦合谐振式技术的双负载无线输电系统在分米级的传输距离下能够达到较高的传输效率.

Characteristic Research on Multiple Receivers of Magnetically-coupled Resonant Wireless Power Transfer System

For transmitting coil that received two small parallel load coils,the frequency tracking device was built with double-coil structure transmission device platform,on which an experiment was conducted to evaluate the relationship between the transmission efficiency and the distance of transmitter coils.A brief introduction of the experiment device was given,including a frequency tracking part.This platform overcomes the issue that ordinary double-coil structure easily detuned and the various experimental conditions on the platform were theoretically analyzed.The results obtained from simulation model were consistent with experimental results,indicating that the application of magnetically coupled resonant technology with dualload wireless transmission system in decimeter transmission distance can reach higher transfer efficiency.