针对电动汽车无线充电线圈的相关特性,提出了耦合谐振电路结合 Maxwell 软件建模的方法对 其进行分析;电动汽车用无线充电系统的互感线圈是实现无线充电的重要模块,对其进行特性研究有助于实 际生产中线圈的设计和优化。 为此,首先分析电动汽车用无线充电技术,并建立耦合谐振电路的等效模型进 行公式推导,进而通过 Matlab 仿真研究线圈互感系数对系统输出功率和传输效率的影响。 然后在 Maxwell 软件中搭建互感线圈的仿真模型,依次改变线圈的匝数、水平偏移程度和垂直距离进行仿真实验分析;仿真 得到线圈在不同互感系数下系统输出功率和传输效率线圈的变化情况和磁感应强度分布图、耦合系数变化 折线图。 根据仿真结果对线圈特性进行分析,最后得出随着互感系数的增加系统输出功率先增后减,传输效 率不断增加。 以及在线圈匝数减小线圈水平偏移程度以及垂直距离不断变大的情况下,线圈的耦合系数不 断降低,且降低幅度变大的线圈特性。
Aiming at the research on the characteristics of wireless charging coil of electric vehicle the method of coupling resonant circuit combined with Maxwell software modeling is proposed to study its characteristics. Mutual inductance coil of wireless charging system for electric vehicle is an important module to realize wireless charging. The research on its characteristics is helpful to the design and optimization of coil in actual production. Therefore firstly the wireless charging technology for electric vehicles is analyzed and the equivalent model of coupled resonant circuit is established for formula derivation. Then the influence of coil mutual inductance coefficient on system output power and transmission efficiency is studied by MATLAB simulation. Then the simulation model of mutual inductance coil is built in Maxwell software and the number of turns horizontal offset and vertical distance of coil are changed in turn for simulation experiment analysis. The variation of output power and transmission efficiency of the coil under different mutual inductance coefficients the distribution diagram of magnetic induction intensity and the broken line diagram of coupling coefficient are obtained by simulation. According to the simulation results the coil characteristics are analyzed. Finally with the increase of mutual inductance coefficient the output power of the system increases first and then decreases and the transmission efficiency increases continuously. And when the number of turns of the coil decreases the horizontal offset degree of the coil and the vertical distance increase the coupling coefficient of the coil decreases and the reduction amplitude increases.
高俊岭, 张 强.电动汽车用无线充电系统的线圈特性研究[J].重庆工商大学学报（自然科学版）,2022,39(6):99-104
GAO Jun-ling, ZHANG Qiang. Research on Coil Characteristics of Wireless Charging System for Electric Vehicle[J]. Journal of Chongqing Technology and Business University(Natural Science Edition）,2022,39(6):99-104