无线能量传输系统移相控制ZVS设计研究

Research on ZVS Wireless Power Transfer System With Phase Shifting Control

由于滞后管的非零电压开关,采用全桥逆变器的无线能量传输系统在移相控制时会存在超前管误触发的问题。针对此情况,提出了一种基于LCC补偿电路的优化方法。首先,建立了无线能量传输系统模型;然后,根据该模型对系统在移相时实现零电压开关(ZVS)的补偿电路参数条件进行了推导;最后,利用仿真以及无线能量传输系统实验平台对优化前后系统的输出功率、传输效率等参数进行了分析,并对提出的优化方法进行验证。实验结果证明该方法能够实现无线能量传输系统滞后管的ZVS,有效提高了系统在移相时的整体效率,并且不影响其输出和传输性能。

Because of the non-zero voltage switch of lagging-leg switches,the wireless energy transfer system using the full-bridge inverter has the problem of false triggering of leading switches in the phase-shifting control.In view of this situation,it presents an optimization method based on LCC compensation circuit.Firstly,the wireless transfer energy system model is established.Then,the condition of compensation circuit parameters realizing zero-voltage-switching(ZVS)of lagging-leg switches is deduced according to the model.Finally,the output power,transmission efficiency and other parameters of the system before and after the optimization are analyzed,and the proposed optimization method is verified by the simulation and the wireless energy transfer system test platform.The experimental results show that the method can realize the ZVS of lagging-leg switches and effectively improve the overall efficiency of the system in phase shift control without affecting the output and transmission performance of the system.