耦合谐振式无线电能传输系统的线圈优化

The Coil Model of Coupled Magnetic Resonance Wireless Power Transmission System

在设计磁耦合谐振式无线电能传输系统时,由于存在理论偏差和实际损耗,其传输效率会随着传输距离的增大而急剧减小。因此如何有效地提升发射端与接收端的耦合系数,设计最优的线圈结构以提高传输效率,对研究磁耦合谐振式无线电能传输系统有着重要的理论意义和实用价值。本文采用耦合模理论对系统进行建模,在COMSOL软件平台下,对磁耦合谐振式系统的线圈结构进行了仿真分析,初步得到不同结构的线圈对系统传输效率的影响,在此基础上,提出了在固定线圈距离时线圈参数优化的方案。

In the design of coupled magnetic resonance wireless power transmission system, due to the existence of the actual loss and theoretical bias, the transmission efficiency will be sharply reduced with the increase of transmission distance. So how to improve the coupling coefficient of the transmitter and the receiver, and design the optimal coil structure to improve transmission efficiency, have important theoretical significance and practical value on the study of magnetic resonance wireless power transmission system. In this paper, the system modeling is based on the coupled-mode theory. Under the COMSOL software platform, the coil's structure of magnetic coupling resonant system has been simulated. From these simulations, results that different coils have different effect on the transfer efficiency of the system can be obtained. At last, when the distance between the two coils is fixed, the optimization scheme of the parameters of the coils has been put forward.