基于双管E类电路的磁耦合谐振无线供电技术研究

Research of Wireless Power Transmission Technology Via Resonant Based on Double E Circuit

根据电路原理,建立了磁耦合谐振式无线电能传输系统的电路模型,并通过MATLAB数值仿真,研究了发射和接收电感、系统工作频率、发射和接收线圈间的传输距离对负载功率、传输效率、源端回路电流等传输特性的影响。为提高系统功率和频率,提出将双管E类电路作为高频电源的主拓扑应用到谐振式无线供电系统,并根据MATLAB和Saber仿真所得的参数,设计了一款基于双管E类电路的高效、中功率磁耦合谐振系统,谐振频率为500 kHz、最佳传输距离7 cm、传输功率200 W、传输效率85%以上。试验结果与理论分析和仿真结果相吻合。

In order to study on the high efficiency and medium power wireless power supply via magnetic resonance coupling,this paper uses the principle of the circuit to establish the circuit model,at the same time,uses MATLAB to analyze the impact from inductance,frequency,transmission distance on load power,transmission efficiency,loop current.Then,in order to improve the system power and frequency,the double E circuit is used as the topology of power.Finally,based on the parameters selected by MATLAB and Saber,a high efficiency and medium power magnetic coupling resonant system based on double E circuit is designed.The resonant frequency is 500 kHz,the best distance is 7 cm,the system power is 200 W.The experimental results show that the theoretical analysis is correct.