电动汽车无线充电系统金属异物检测灵敏度优化方法
Sensitivity Optimization Method for Metal Object Detection in Electric Vehicle Wireless Charging System
张彬 1朱翀 1张希1
作者信息
- 1. 上海交通大学机械与动力工程学院,上海 200240
- 折叠
摘要
为提高电动汽车无线充电系统金属异物检测性能,提出 1 种检测线圈灵敏度优化方法.首先,建立金属异物介入矩形检测线圈的等效电磁模型,研究线圈的物理参数变化机理,得到不同尺寸金属异物引起的检测线圈参数变化理论公式;其次,分析多个线圈构型参数对检测线圈灵敏度的影响,结合无线充电实际工况优化检测线圈构型,通过电磁场仿真及实验证明了理论模型的准确性;最后,在3 kW无线充电系统中进行金属异物检测实验,结果表明:以优化后检测线圈为基础搭建的金属异物检测系统可以准确地检测到25 mm及以上尺寸的金属异物,并具有抗干扰能力.
Abstract
To improve the metal object detection performance for an electric vehicle wireless charging system,a sensitivity optimization method for the detection coil was proposed.The equivalent electromagnetic model of a rectangular detection coil with a metal object approaching was established.The changing mechanism of the physical parameters of the coil was studied,and a theoretical formula for changes in the parameters of the detection coil which were caused by metal objects of different sizes was obtained.The influence of several configuration parameters on the sensitivity of the detection coil was analyzed,and the configuration of the detection coil was optimized by combining the actual operating conditions of wireless charging.Through the electromagnetic field simulation and experimental verification,the accuracy of the theoretical model was proved.Finally,a metal object detection experiment was carried out in a 3 kW wireless charging system,which verified that the metal object detection system built on the basis of the optimized detection coil can detect metal objects with a size of 25 mm and above.In addition,it had anti-interference capability.
关键词
无线充电/金属异物检测/检测线圈灵敏度Key words
Wireless charging/metal object detection/sensitivity of detection coil引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据