无线电能传输系统的阻抗匹配研究

近年来,磁耦合谐振式无线电能传输系统在各个领域得到了广泛应用.针对无线电能传输系统工作过程中,传输距离改变导致电能传输效率显著下降的问题,提出一种在无线电能传输系统接收端通过阻抗转换,得到负载端的等效阻抗,进行阻抗匹配的方法,使系统在传输距离改变和负载变化时,电能传输效率上下波动减小,达到高频信号从发射端到接收端的高效传输、减少信号反射的目的.通过ADS软件仿真验证,这种方法能使系统在传输距离发生微小变化的情况下,传输效率得到提高.

Research on Impedance Matching of Wireless Power Transmission System

In recent years,the wireless power transmission via magnetic resonant coupling has been extensively researched for various applications.In the process of wireless power transmission,the change of distance leads to a significant reduction in the power transmission efficiency.To solve this problem,a new impedance matching method inverting the impedance of receiving port as equivalent impedance of the load port is proposed,which makes the system power transmission efficiency fluctuation reduced when both the position and the load changes,so as to achieve the efficient transformation of the high-frequency signal from the transmitter to the receiving end and reduce the signal reflection.Through ADS software simulation verification,this method can improve the system transmission efficiency in case of small changes in the transmission distance.