基于LCC-S型WPT系统的抗偏移参数补偿方法

An Anti-migration Parameter Compensation Method Based on LCC-S WPT System

无线电能传输(WPT)在实际应用中线圈的位置会发生偏移,引起传输功率的波动,输出功率波动较大会使用电设备存在安全隐患。为了解决线圈偏移时输出功率波动较大的问题,在此提出一种基于LCC-S型WPT系统的参数补偿,通过线圈偏移时初级补偿网络失谐,降低对线圈互感变化的敏感度,从而降低输出功率的波动。最后,搭建了一台100 W的实验样机对所提补偿方法进行验证,实验结果表明,该样机能在耦合系数为0.229~0.352的波动区间内,保持系统输出功率波动小于6.1%,同时最大整机效率能达到90.4%。

In practical applications of wireless power transfer(WPT),the position of coils will be offset,resulting in transmission power fluctuations,and large output power fluctuations may lead to safety risks in electrical equipment.In order to solve the problem that the output power fluctuates greatly when the coil is offset,a parameter compensation based on the LCC-S type WPT system is proposed.By compensating the network detuning at the primary side when the coil is offset,the sensitivity to the coil mutual inductance changes is reduced,so as to reduce the output power fluctuation.Finally,a 10o W prototype is built to verify the proposed compensation method,experimental results show that the prototype can keep the system output power fluctuation less than 6.1%in the coupling coefficient range of 0.229~0.352,and the maximum efficiency of the whole machine can reach 90.4%.