一种应用于无线电能传输的谐振频率跟踪方法

针对锂电池在无线充电过程中特性参数实时变化导致充电系统失谐的缺点,提出了谐振频率跟踪控制方法,并给出实现方案。使用Matlab/Simulink来实现谐振频率跟踪算法,通过改变模拟电池内阻参数来模拟锂电池的充电过程。搭建了实验验证平台,实验结果证明该方法能够使工作频率与谐振频率相一致,工作可靠,并能够有效提高系统的传输效率。

Resonance Frequency Tracking Method Applied in Wireless Power Transmission

During the wireless power transmission(WPT) process, the characteristic parameters of a lithium battery usually change in real-time, which will lead to mismatch in the WPT system. To overcome this defect, a control method of resonance frequency tracking is proposed in this paper, and the realization scheme is given. The resonance frequency tracking algorithm is realized using MATLAB/Simulink, and simulations are conducted to simulate the charging process of the lithium battery by changing its internal resistance. The experimental varification platform is built, and the results show that the proposed method can make the working frequency agree well with the resonance frequency while operating in a reliable manner. In addition, it can effectively improve the system''s transmission efficiency.