双LCL谐振型电动汽车无线充电系统研究

摘要

Aiming at the problem that the electric vehicle (EV) needs to be charged frequently due to the short battery life and the safety hidden danger in rain charging,a wireless charging method is proposed based on double LCL composite resonant network.By adjusting the inverter output frequency and the resonant capacitor to achieve constant load current and voltage output.On the one hand,the wireless charging can be realized on-line charging of EV,to solve the short battery life,frequent charging problems.On the other hand,the wireless charging without physical direct contact to avoid contact with sparks and other security risks.Finally,the feasibility of dual LCL resonant wireless power transfer(WPF) system applied to electric vehicle battery charging is verified by simulation and experiment.%针对电动汽车(EV)续航较短需频繁充电及雨天充电存在安全隐患的问题,提出一种基于双LCL复合谐振网络的EV无线充电方法,通过调节逆变器的输出频率及初级谐振电容的切入和切出即可实现负载的恒流、恒压输出.一方面,无线充电可实现EV的移动式在线充电,解决了续航短、频繁充电的难题;另一方面,无线充电无物理上的直接接触,避免接触火花等安全隐患.通过仿真和实验验证了双LCL谐振型无线电能传输(WPT)系统应用在EV蓄电池充电上的可行性.