摘要
铁磁性金属异物是无线电能传输系统在实际运行中常见的干扰物之一,其通过影响磁耦合机构的电气参数间接影响无线电能传输系统的输出特性。DD/BP结构作为电动汽车无线电能传输系统最常见的磁耦合机构类型,本文将以其为例通过磁场模型分析铁磁性金属异物对DD/BP磁耦合机构的线圈自感和线圈间互感的影响,通过磁理论的分析说明不同位置的铁磁性金属异物对DD/BP磁耦合机构的影响,借助Maxwell构建DD/BP磁耦合机构电磁仿真模型,在模型中不同垂直位置和水平位置加入铁磁性金属,来证实理论推导的正确性。仿真结果表明铁磁性金属异物处于DD/BP线圈两侧时会增大线圈自感和线圈间互感,而处于两D线圈交界处时会增大线圈自感并减小线圈间互感;在垂直方向上铁磁性金属异物越靠近线圈对相应线圈的自感的影响越大,越靠近任意线圈对线圈间的互感影响越大。
Ferromagnetic metal foreign Bodies are one of the common interference objects in the actual operation of wireless power transmission systems. It indirectly affects the output characteristics of the wireless power transmission system by affecting the electrical parameters of the magnetic coupling mechanism. DD/BP structure is the most common type of magnetic coupling mechanism for electric vehicle wireless power transmission system. This paper takes DD/BP magnetic coupling mechanism as an example to analyze the influence of ferromagnetic metal foreign bodies on the coils′ self-inductance and mutual inductance, and introduces the influence of ferromagnetic metal foreign bodies in different positions on the magnetic coupling mechanism of DD/BP based on the analysis of magnetic theory. An electromagnetic simulation model of the DD/BP magnetic coupling mechanism is built to simulate the electrical influence by using Maxwell. Ferromagnetic metal foreign Bodies are set in different horizontal or vertical position of the model to verify the correctness of the theoretical derivation. The simulation results show that when the ferromagnetic metal foreign body is on both sides of the DD/BP coil, it will increase the coil self-inductance and the mutual inductance between the coils, while at the junction of the two D coils, it will increase the coil self-inductance and reduce the mutual inductance between the coils. In the vertical direction, the closer the ferromagnetic metal foreign body is to the coil, the greater the influence on the self-inductance of the corresponding coil, and the closer to any coil the greater the influence on the mutual inductance between the coils.
作者
周润棠
杜贵平
沈栋
Zhou Runtang;Du Guiping;Shen Dong(School of Electric Power,South China University of Technology,Guangzhou 510640,China)
出处
《电子测量技术》
北大核心
2021年第17期19-25,共7页
Electronic Measurement Technology
基金
广东省自然科学基金(2017B030312001)
广东省应用型科技研发专项资金(2015B020238012)项目资助。
关键词
无线电能传输
DD/BP磁耦合机构
铁磁性金属异物
电磁仿真
wireless power transfer
DD/BP magnetic coupler
ferromagnetic metal foreign body
electromagnetic simulation
