基于双D形正交混合拓扑的感应电能传输系统恒流输出研究  

Research on Constant Current Output of Inductive Power Transfer System With Double-D Quadrature Hybrid Topology

作　　者：李砚玲[1] 杜浩 何正友[1] LI Yanling;DU Hao;HE Zhengyou(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China)

机构地区：[1]西南交通大学电气工程学院

出　　处：《中国电机工程学报》2020年第3期942-950,共9页Proceedings of the CSEE

基　　金：国家重点研发计划轨道交通专项课题(2017YFB1201002);国家自然科学基金项目(51507147);国家杰出青年科学基金项目(51525702)~~

摘　　要：为提高电动汽车无线充电在变负载条件下的线圈抗偏移能力,提出一种基于双D形正交(double-Dquadrature,DDQ)混合拓扑的感应电能传输(inductive power transfer,IPT)系统参数配置及优化方法。结合DDQ线圈的自解耦特性,分别采用一次侧与二次侧对称的LCL谐振网络、LC串联谐振网络,构成系统的双能量传输通道;进一步通过配置相应的电感与电容值,使两通道的输出电流均与负载无关,而分别与线圈互感成正比与反比关系,基于电流叠加方式达到变负载条件下恒流输出的目的。在此基础上,分析恒流输出下的DDQ线圈互感变化规律,并通过优化参数Lt1与Lt2,使IPT系统可允许的拾取偏移最大。仿真与实验结果表明,在所容许0%~49.3%的互感变化范围内,二次侧输出电流在变负载条件下均具有不超过±5%的稳流效果。In order to enhance the misalignment tolerant of the wireless charging of electric vehicles under load changing conditions,a method of parameter configuration and optimization for inductive power transfer(IPT) system based on double-D quadrature(DDQ) hybrid topology was proposed in this paper.Combined with the self-decoupling characteristics of DDQ coils,the LCL and LC series resonant networks were symmetrically used on primary and secondary sides to form the dual energy transmission channels.Further,by configuring the corresponding inductance and capacitance values,the output currents of two channels were independent of the load,and were respectively directly proportional and inversely proportional to their mutual inductances,to achieve the purpose of the constant current output under the load changing condition based on the current superposition.On this basis,the variation law of mutual inductance of DDQ coils under constant current output was analyzed,and the allowable pickup offset of IPT system was maximized by optimizing parameters Lt1 and Lt2.The simulation and experimental results show that the output current on secondary side has a steady effect of no more than ±5% under load changing conditions within the allowable coil offset range of 0%~49.3%.

关 键 词：感应电能传输 混合拓扑 双D形正交线圈 恒流输出 

分 类 号：TM724[电气工程—电力系统及自动化]