线圈非同轴时磁耦合谐振式无线电能传输系统的效率优化

针对磁耦合谐振式无线电能传输系统的发射线圈与接收线圈非同轴放置时系统的传输效率过低的问题,运用耦合模理论,推导出系统的效率表达式。并以此为基础,分析发射线圈与接收线圈非同轴放置时,系统传输效率的变化规律。为解决发射线圈与接收线圈之间非同轴放置时系统效率过低的问题,提出一种基于混沌优化算法的参数动态调节方法,该方法能使系统几个关键参数实现最优匹配,有效提高系统的传输效率。最后,研制了一套磁耦合谐振式无线电能传输系统装置。仿真和实验结果验证了理论分析的正确性。

Optimum Efficiency Analysis of Wireless Power Transfer System via Coupled Magnetic Resonances with Lateral and Angular Misalignments

Transmission efficiency will be reduced when transmission and receiving coils are aligned non-coaxially in the wireless power transfer system (WPT) via coupled magnetic resonances.The expression for the efficiency of the WPT system was derived by coupled-model theory (CMT).The variation rule of the transmission efficiency was analyzed according to this expression.In this paper,the method of adjusting parameters based on chaos optimization algorithm was proposed.Then key parameters of the WPT system can be matched.It is shown the efficiency can be improved by the proposed method.A wireless power transmission system via magnetic resonance coupling was designed.Simulation and experimental results have verified the theory.