Research on Double-Sided LCC Resonant Topology and Electromagnetic Safety for Wireless Charging System of Electric Vehicles

doi:10.7652/xjtuxb202105019

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Research on Double-Sided LCC Resonant Topology and Electromagnetic Safety for Wireless Charging System of Electric Vehicles

更新时间：2025-07-09

- Research on Double-Sided LCC Resonant Topology and Electromagnetic Safety for Wireless Charging System of Electric Vehicles
- Vol. 55, Issue 5, Pages: 171-180(2021)
- 作者机构：
  
  长安大学汽车学院,西安,710064
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202105019
  CLC： U469.72
- Online First：10 May 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
Research on Double-Sided LCC Resonant Topology and Electromagnetic Safety for Wireless Charging System of Electric Vehicles[J]. 2021, 55(5): 171-180.
DOI：

Research on Double-Sided LCC Resonant Topology and Electromagnetic Safety for Wireless Charging System of Electric Vehicles[J]. 2021, 55(5): 171-180. DOI： 10.7652/xjtuxb202105019.

摘要

为了研究电动汽车无线充电系统谐振补偿网络和充电线圈电磁暴露的安全性问题

首先对无线充电系统中4种基本谐振补偿网络的传输特性进行了分析

接着应用电路模型对双边LCC型补偿网络进行了理论分析

并采用Matlab/Simulink对4种基本补偿网络和双边LCC型补偿网络模型进行仿真

比较了二者的传输功率和传输效率。其次

分析了原边线圈与副边线圈耦合系数和磁通密度随线圈间气隙变化和水平偏移变化的情况。最后

通过建立简易人体模型

采用有限元仿真软件COMSOL构建了人体模型不同位置处的磁感应强度。结果表明:双边LCC型谐振补偿网络较4种基本补偿网络具有更好的抗偏移能力

适用于大功率电动汽车动态无线充电系统中; 磁感应强度最大值出现在人体脚踝处

最大值为2.043 μT

占国标规定值的7.57%

其他位置处均远小于国标规定的安全限制。这说明电动汽车在进行无线充电时

线圈产生的高频电磁暴露不会对人体安全产生影响

有利于电动汽车无线充电的推广应用。

Abstract

To study the compensation networks in wireless charging systems and the safety of electromagnetic exposure in wireless charging with charging coil for electric vehicles

the transmission characteristics of four basic resonance compensation networks are analyzed. Then

a double-sided LCC resonant topology is proposed and analyzed based on the circuit model theoretically. The four basic resonance compensation networks and the double-sided LCC resonant topology are compared with respect to the transmission power and the transmission efficiency using the Matlab/Simulink software. The coupling coefficient and magnetic flux density are studied at different air-gaps and misalignments between the primary coil and the secondary coil. A human body model is modeled to study the magnetic flux density at different measuring points using the finite element method software COMSOL. The results show that the double-sided LCC resonant topology has a high anti-offset capability

which is suitable for dynamic high-power wireless charging for electric vehicles. Moreover

the maximum magnetic induction intensity at the ankle point is 2.043 μT

accounting for 7.57% of the threshold. The magnetic induction density at other points in a human body model is below the safety limits of GB/T 38775.4—2020 guidelines. It indicates that the high frequency electromagnetic exposure produced by coils will not affect human electromagnetic safety when the electric vehicles are wireless charged. The assessment in this paper is conducive to the development of wireless charging for electric vehicles.

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