摘要
以采用Halbach型永磁体的跨座式永磁悬浮列车为背景,车载永磁体和永磁轨道发生横向偏移时会产生横向力且其方向与偏移方向一致。针对永磁悬浮系统这一横向力问题,提出针对Halbach阵列永磁体进行尺寸参数优化的方法优化永磁悬浮系统的横向力问题。利用正弦法对永磁体磁场进行解析,确定要优化的三个尺寸参数分别为:永磁体厚度、永磁体宽度和相邻两块永磁体的磁化角度差。仿真分析表明:增大永磁体的厚度会增加永磁悬浮系统的横向刚度;增大永磁体宽度会提高永磁悬浮系统的悬浮稳定性,但永磁悬浮系统的横向刚度受宽度改变影响较小;而减小磁化角度差,会提高悬浮稳定性同时减小横向刚度;但相比于另外两种参数,在改变永磁体磁化角度差时需注意确保组成的Halbach型永磁体在整数倍波长内。
In the context of a straddle-type permanent magnetic levitation(PML)train using Halbach-type permanent magnets,a lateral force is generated when the on-board permanent magnets and the permanent magnet track undergo a lateral excursion,and the direction of the force is the same as the direction of the excursion.In order to optimize the transverse force problem of the permanent magnetic levitation system,a method of optimizing the dimensional parameters of Halbach array permanent magnets is proposed.The magnetic field of the permanent magnet is analyzed using the sinusoidal method,and the three dimensional parameters to be optimized are determined as:the thickness of the permanent magnet,the width of the permanent magnet,and the difference in the magnetization angle of the two adjacent permanent magnets.Simulation analysis shows that:increasing the thickness of the permanent magnet will increase the transverse stiffness of the permanent magnet levitation system;increasing the width of the permanent magnet will improve the levitation stability of the permanent magnet levitation system,but the transverse stiffness of the permanent magnet levitation system will be less affected by the change of the width;and decreasing the difference in the magnetization angle will improve the levitation stability and decrease the transverse stiffness;however,compared with the other two parameters,care should be taken to ensure that the difference in the magnetization angle of the permanent magnet is not too large when the permanent magnets are changed.Halbach-type permanent magnets are composed within an integer multiple of the wavelength.
作者
李博涵
吴兴文
杨浚纲
池茂儒
赵明花
张卫华
邓自刚
LI Bo-han;WU Xing-wen;YANG Jun-gang;CHI Mao-ru;ZHAO Ming-hua;ZHANG Wei-hua;DENG Zi-gang(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《磁性材料及器件》
2025年第3期1-10,共10页
Journal of Magnetic Materials and Devices
基金
四川省科技计划项目(2022NSFSC0469,2023NSFSC0374)
中国国家铁路集团有限公司科技研究开发计划项目(P2019J002)。
关键词
永磁悬浮
HALBACH阵列
永磁体参数优化
横向刚度
轨道不平顺
permanent magnetic levitation(PML)
Halbach array
magnet parameter optimization
lateral stiffness
track irregularities
