电动汽车多车位WPT下沉式磁屏蔽系统研究  

Research on WPT sunken magnetic shielding system for electric vehicles with multiple parking spaces

作　　者：张学毅[1] 任立权 熊鑫博 孔彭生 李中启[1,2] 杨民生 ZHANG Xueyi;REN Liquan;XIONG Xinbo;KONG Pengsheng;LI Zhongqi;YANG Minsheng(School of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412000,China;School of Electrical and Information Engineering,Hunan University,Changsha 410000,China;Key Laboratory of Hunan Province for Control Technology of Distributed Electric Propulsion Air Vehicle,Changde 415000,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412000 [2]湖南大学电气与信息工程学院,湖南长沙410000 [3]湖南省分布式电驱动飞行器重点实验室,湖南常德415000

出　　处：《电工电能新技术》2024年第4期76-85,共10页Advanced Technology of Electrical Engineering and Energy

摘　　要：在电动汽车无线电能传输系统中,实现高效传输的同时减少磁泄漏一直是一个技术挑战。针对这一问题,本文提出了一种应用于多无线电能传输系统的下沉式屏蔽线圈结构,该结构在减小目标面漏磁的同时不会影响系统的传输效率。首先,提出了一种基于矢量磁位的矩形线圈磁场计算方法,通过此方法对系统目标面漏磁进行分析,为后续的磁泄漏优化提供了理论依据;其次,介绍了一种漏磁优化的方法,运用该方法得到满足要求的各线圈参数,为实现高效的无线电能传输提供了关键支持;最后,根据得到的线圈参数,研制了一套带磁屏蔽结构的双车位电动汽车无线充电系统,通过仿真和实验,让提出的屏蔽结构和方法的有效性得到了充分证实。结果显示,当系统输出功率恒定在4 kW时,所提出的屏蔽结构不仅使目标区域最大泄漏磁场降低了25%,且传输效率高达95%。In electric vehicle wireless power transfer systems,realizing efficient transmission while reducing mag⁃netic leakage has been a technical challenge.To address this issue,the paper proposes a sunken shielding coil structure applied to a multi⁃radio wireless power transfer system,which reduces the magnetic leakage from the target surface without affecting the transmission efficiency of the system.Firstly,a method of calculating the magnetic field of a rectangular coil based on the vector magnetic potential is submitted,by which the magnetic leakage from the target surface of the system is analyzed,providing a theoretical basis for the subsequent magnetic leakage opti⁃mization;secondly,a method of magnetic leakage optimization is introduced,and each coil parameter meeting the requirements is obtained by applying the method,which provides a key support for the realization of high⁃efficiency wireless power transfer;lastly,a set of dual⁃sunken shielded coil structures with magnetic shielding structure is de⁃veloped based on the coil parameters obtained;and lastly,a set of dual⁃sunken shielding coil structures with mag⁃netic shielding structure applied to multiple wireless power transfer systems is developed based on the coil parame⁃ters obtained,which will not impact the system transmission efficiency.Finally,based on the obtained coil parame⁃ters,a dual⁃position electric vehicle wireless charging system with magnetic shielding structure is developed,and the effectiveness of the proposed shielding structure and method is fully confirmed through simulation and experi⁃ment.The results show that the proposed shielding structure not only reduces the maximum leakage magnetic field in the target area by 25%but also achieves a transmission efficiency of up to 95%when the output power of the system is constant at 4 kW.

关 键 词：电动汽车 无线电能传输 电磁屏蔽 传输效率 

分 类 号：TM724[电气工程—电力系统及自动化]