自激振荡无线电能传输系统的同步调谐研究

摘要

In order to solve the detuning problem caused by parameters variation in the practical wireless power transfer (WPT) system,a synchronous tuning method for both the transmitter and receiver of the WPT system is proposed. For the frequency tuning of the transmitter,a substitution method between the delay and time difference under the self-oscillating mode is proposed. For the parameter tuning of the receiver,a dichotomy-based method which requires only frequency measurement is proposed. The synchronous tuning method is simple and practicable without any amplitude measurement and data communication,which is applicable under the unstable source voltage and communication interference.%应对无线电能传输系统(WPT)易因失谐而导致功率效率降低的问题,提出了WPT系统发射端频率与接收端参数同步调谐的方法.对于发射端的频率调谐,采用自激振荡的工作模式,同时提出将时间差代换为延迟的方法进行调谐;对于接收端的参数调谐,提出了一种仅需要频率测量的二分法调谐方法.所提出的方法简单易行,且仅需要频率与相位的测量,无需幅值测量和两端的数据通信,在电源电压、负载不稳与存在通信干扰的场合仍然适用.