电工技术学报  2016, Vol. 31 Issue (1): 71-79    DOI:
电磁兼容 |
基于有限元方法的电动汽车无线充电耦合机构的磁屏蔽设计与分析
张献,章鹏程,杨庆新,苑朝阳,苏杭
天津工业大学天津市电工电能新技术重点实验室 天津 300387
Magnetic Shielding Design and Analysis for Wireless Charging Coupler of Electric Vehicles Based on Finite Element Method
Zhang Xian,Zhang Pengcheng,Yang Qingxin,Yuan Zhaoyang,Su Hang
Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China
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摘要 为降低电动汽车无线充电耦合机构工作时对非工作区域内电磁环境的影响,并提高耦合效率,对电动汽车无线充电过程中空间电磁能量约束问题设计了一套带有屏蔽的能量耦合机构,建立了其有限元模型,有限元计算和实验结果验证了该方法的可行性。实验结果表明,耦合机构外加铁氧体屏蔽后,传能区域内的磁场被约束在发射耦合机构与接收耦合机构之间,空间磁场均匀性增强,屏蔽层之外的磁场强度远小于未加屏蔽的耦合机构,降低了辐射损耗,同时加入屏蔽结构耦合机构的电感量增大,谐振频率降低。其在远距离、水平偏移等耦合性差的工作环境下能有效提高系统传输功率,且能减少电动汽车无线充电对外界的电磁干扰,增强无线充电系统工作的稳定性。
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张献
章鹏程
杨庆新
苑朝阳
苏杭
关键词 电动汽车无线供电有限元磁屏蔽电磁干扰    
Abstract:To reduce the operating electromagnetic interference of the wireless charging coupler in the non-working area and increase its coupling efficiency,this paper focuses on the space electromagnetic energy constraints and designs an energy coupler with magnetic shielding.A finite element model of the coupler is built.Both the simulation results and the experiment data prove the feasibility of the proposed structure.The results indicate that,after installing the ferrite shield out of the coupling structures,the magnetic field is concentrated within the area between the transmission coil and the receiver coil and the magnetic field distribution is more homogenized.The magnetic field density out of the magnetic shielding is far less than that without magnetic shielding.So the radiation loss is reduced.By adding the magnetic shielding components,the inductance of the coupling structure is increased and its resonant frequency is then decreased.Therefore,the structure would improve the system transfer efficiency under poor coupling conditions of long separation and horizontal misalignment.It can also reduce the electromagnetic interference of electric vehicles’wireless charging and improve the system operational stability.
Key wordsElectric vehicle    wireless charging    finite element method    magnetic shielding    electromag-netic interference   
收稿日期: 2015-06-28      出版日期: 2016-01-21
PACS: TM72  
  TM15  
基金资助:国家自然科学基金(51477117,51307120,51237005)、天津市自然科学基金青年项目(15JCQNJC01900)和天津市科技支撑计划重点项目(15ZCZDGX00980)资助。
通讯作者: 章鹏程 男,1991年生,硕士研究生,研究方向为无线电能传输技术。E-mail:logii@qq.com     E-mail: zxshow1983@163.com
作者简介: 张 献 男,1983年生,副教授,研究方向为无线电能传输技术。E-mail:zxshow1983@163.com
引用本文:   
张献,章鹏程,杨庆新,苑朝阳,苏杭. 基于有限元方法的电动汽车无线充电耦合机构的磁屏蔽设计与分析[J]. 电工技术学报, 2016, 31(1): 71-79. Zhang Xian,Zhang Pengcheng,Yang Qingxin,Yuan Zhaoyang,Su Hang. Magnetic Shielding Design and Analysis for Wireless Charging Coupler of Electric Vehicles Based on Finite Element Method. Transactions of China Electrotechnical Society, 2016, 31(1): 71-79.
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