并联LCL补偿在移动式无线电能传输中的应用

摘要

The traditional static wireless power transfer technology for electric vehicle has the disadvantage of limited charging area and long charging time.To solve the problem,a multi coil parallel electric vehicle wireless technology is proposed.It can realize the power charging while driving.The system uses a multi parallel primary side coil topology.When the coil doesn't work the coil can be cut out to prevent unnecessary power waste.In addition,the system uses LCL resonant compensation to achieve the constant primary current.By analyzing the relation of mutual inductance and displacement,a dynamic wireless charging coil structure is designed,which can achieve the stable transmission of power when the vehicle runs on multiple coils.Both simulation and experimental results show that the proposed multi coil parallel electric vehicle wireless technology can achieve stable power transmission and improve transmission efficiency.%传统静止式电动汽车无线电能传输技术存在充电区域受限、充电时间过长等缺点.为解决这一问题,提出一种多线圈并联式电动汽车无线技术,能够实现电动汽车在行驶的同时进行充电,提高了电动汽车的续航能力.系统采用多个初级线圈并联的拓扑,在无需充电时,可关闭对应初级线圈的供能,减小不必要的功率损耗.此外,运用LCL谐振补偿,实现初级线圈电流恒定特性.通过分析互感与位移变换规律,设计了移动式无线充电耦合结构,能够实现车辆在多个线圈间行驶时,保持传输功率的稳定.仿真与实验结果表明所提出的多线圈并联式电动汽车无线技术,能实现功率的稳定传输,提高传输效率.