基于容性屏蔽的无线电能传输系统有源磁屏蔽结构优化  

Optimisation of active magnetic shielding structure for wireless energy transmission systems based on capacitive shielding

作　　者：龙永红[1] 李辉 孔彭生 李中启[1,3] 任立权 LONG Yonghong;LI Hui;KONG Pengsheng;LI Zhongqi;REN Liquan(College of Railway Transportation,Hunan University of Technology,Zhuzhou 412007,China;College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南工业大学轨道交通学院,湖南株洲412007 [2]湖南工业大学电气与信息工程学院,湖南株洲412007 [3]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电工电能新技术》2024年第6期49-59,共11页Advanced Technology of Electrical Engineering and Energy

基　　金：国家重点研发计划项目(2022YFB3403200);湖南省自然科学基金项目(2022JJ30226)。

摘　　要：为了改善无线电能传输系统中的磁场泄漏问题,本文提出了一种基于无源容性屏蔽的强耦合有源磁屏蔽结构。首先,在无源容性屏蔽的无线电能传输系统的基础上,设计了一种强耦合有源磁屏蔽线圈结构。其次,给出了此线圈的工作原理与设计方法,推导了数学模型以及等效电路模型。从理论出发解释了容性屏蔽和有源屏蔽的原理,并对屏蔽效果及传输效率受屏蔽线圈参数变化的影响作了分析。最后,结合得到的线圈参数,在所提线圈结构的基础上,设计出了一套电动汽车无线充电系统,通过理论计算、仿真和实验,对所提线圈结构和方法的有效性进行了验证。结果显示,该线圈结构在维持96%以上传输效率的同时,能够将系统的漏磁减少大约40%,实现了降低泄漏磁场和保持高传输效率的目标。In order to improve the problem of magnetic field leakage in wireless energy transmission systems,this paper proposes a strongly coupled active magnetic shielding structure based on passive capacitive shielding.Firstly,a strongly coupled active magnetic shielding coil structure is designed on the basis of passive capacitive shielding of wireless energy transmission system.Secondly,the operating principle and design method of this coil are given,and the mathematical model as well as the equivalent circuit model are derived.The principles of capacitive shiel⁃ding and active shielding are explained theoretically,and the shielding effect and transmission efficiency are ana⁃lyzed as affected by the variation of shielding coil parameters.Finally,a wireless charging system for electric vehi⁃cles is designed on the basis of the proposed coil structure by combining the obtained coil parameters,and the ef⁃fectiveness of the proposed coil structure and method is verified through theoretical calculations,simulations and ex⁃periments.The results show that the coil structure is able to reduce the magnetic leakage of the system by about 40%while maintaining a transmission efficiency of more than 96%,which realizes the goals of reducing the leakage magnetic field and maintaining a high transmission efficiency.

关 键 词：电动汽车 无线电能传输 电磁兼容 电磁屏蔽 电磁场 

分 类 号：TM724[电气工程—电力系统及自动化]