基于遗传算法的双边LCC拓扑IPT系统的抗偏移性能研究

Genetic algorithm based anti-offset performance of IPT system with bilateral LCC topology

针对AGV无线电能传输过程中存在的位置偏移情况,提出一种基于双边LCC拓扑的新型磁耦合结构,并基于遗传算法进行了优化设计以进一步提升IPT系统在水平方向的抗偏移性能。首先,详细推导了双边LCC拓扑的补偿网络参数和各支路的电流表达式;其次,介绍了在双极性平面绕组4D线圈的基础上增加一个正交Q线圈的新型复合磁路机构,以提高系统的抗偏移性能和传输性能;然后以SM作为优化目标,采用遗传算法对4D线圈各物理参数进行迭代优化,进一步提升系统的性能;最后,搭建实验样机对该新型磁耦合结构进行了验证,实验结果表明:正对时新型磁耦合结构传输功率为300 W,传输效率为87.12%;接收线圈在水平向偏移百分比δ<20%的范围内输出功率最大波动率小于48%,并保持传输效率始终高于80%,满足实际的需求。

A new magnetic coupling structure based on bilateral LCC topology is proposed and optimized based on the genetic algorithm(GA)to tackle the horizontal offset in the wireless power transfer(WPT)system process of AGVs.Firstly,the parameters of the compensation network and current expressions of each branch for the bilateral LCC topology are derived in detail;Then,a novel composite magnetic coupling mechanism,adding a quadrature Q coil to a bipolar planar-wound 4D coil,is presented to improve the displacement flexibility and transmission performance of the WPT system.Further,the GA is used to iteratively optimize physical parameter of the 4D coil with SM as the optimization objective in order to further improve the performance of the WPT system.Finally,an experimental prototype is built to validate the power transfer performance.The results show that when the transmitting and receiving coils are fully aligned,the output power of the new magnetic structure is 300W,and the transfer efficiency is 87.12%;The maximum output power fluctuation of the receiving coil is less than 48%within the horizontal offset percentageδof less than 20%,and the transfer efficiency is maintained consistently higher than 80%.Hence,the new magnetic structure and optimized design method satisfy the needs of AGV wireless charging.