具有频率跟踪的谐振式无线电能传输技术研究

Research of Wireless Power Transmission Technology via Resonance with Frequency Tracking

根据谐振式无线电能传输原理,建立了系统的电路模型,同时推导和研究了系统的负载功率、传输效率与谐振频率、传输距离和线圈电感量等系统特性间的关系。通过仿真确定了线圈电感量最佳范围,设计了具有频率跟踪功能的无线电能传输系统,并搭建了试验系统。最后经试验验证,试验结果与理论分析和仿真结果相吻合。

In order to study on the transmission characteristics of wireless power transfer system via magnetic resonance coupling,based on the theory of magnetic resonant coupling,this paper established the circuit model of resonance system,at the mean while,calculated and studied the relationship between load power as well as transmission efficiency and system characteristic including the resonant frequency,transmission distance and mutual inductance.Through simulation,the best selection range of transmitting and receiving inductance is confirmed.This paper designed a wireless power transfer system via magnetic resonance coupling with frequency tracking,that the resonant frequency is 1 MHz,the best transmission distance is 20 cm,the transmission power is 100 W and the transmission efficiency is more than 90%.Finally,the experimental verification was carried on.The results show that the experiment is consistent with theoretical analysis and simulation.