轮毂电机驱动车轮不平衡电磁力分析  

Analysis of electromagnetic force causing wheel imbalance in hub motor drive

作　　者：祁诗茵 单颖春[1] 刘献栋[1] QI Shiyin;SHAN Yingchun;LIU Xiandong(School of Transportation Science and Engineering,Beihang University,Beijing 102200,China)

机构地区：[1]北京航空航天大学交通科学与工程学院,北京102200

出　　处：《计算机辅助工程》2024年第3期18-23,共6页Computer Aided Engineering

基　　金：国家自然科学基金(52275232)。

摘　　要：为分析电机齿槽形状、极对数和不同类型的偏心等因素对轮毂电机不平衡电磁力的影响,对表贴式外转子永磁同步轮毂电机建立有限元模型,基于电磁仿真,得到气隙处磁场密度图像。研究结果表明:电机齿槽的开口尺寸、齿槽的对称程度以及齿槽是否采用圆角均会影响不平衡电磁力数值;极对数的改变显著影响电机整体磁场密度的分布,随着极对数的增加,气隙磁场密度显著增大,不平衡电磁力呈类指数级增大且分布更均匀;不同类型的偏心均会导致电机不平衡电磁力的增加,其中在动偏心和混合偏心下不平衡力产生复杂谐波,其基波周期增大的倍数均与极对数呈现相关性。In order to analyze the influence of factors such as motor slot shape,pole pairs,and different types of eccentricity on the unbalanced electromagnetic force of hub motors,a finite element model of surface-mounted outer-rotor permanent magnet synchronous hub motors is established.Based on electromagnetic simulation,the magnetic flux density distributions at air gap are obtained.The research results indicate that the slot opening size,symmetry of slots,and use of fillets in slots all affect the numerical values of unbalanced electromagnetic forces.Changing the number of pole pairs significantly affects the distribution of the motor’s overall magnetic flux density;as the number of pole pairs increases,the magnetic flux density at the air gap increases significantly,leading to an exponential increase in unbalanced electromagnetic forces and a more uniform distribution.Different types of eccentricities increase unbalanced electromagnetic forces,where dynamic eccentricity and mixed eccentricity result in complex harmonic generation,with multiples of the fundamental period correlating with the number of pole pairs.

关 键 词：表贴式外转子永磁同步轮毂电机 不平衡电磁力 齿槽结构 极对数 偏心 

分 类 号：U469.72[机械工程—车辆工程] TB115.1[交通运输工程—载运工具运用工程]