摘要
当牵引机车采用内置式永磁同步轮毂电机时,转矩脉动偏大,引起振动、噪声,从而影响电机运行性能。针对此问题,首先提出一种非对称V型磁极偏移转子结构;其次,基于绕组函数理论和等效磁路法,分别推导出定子磁动势和转子磁动势表达式,结合洛伦兹力定律,得到转矩脉动解析模型;再次,对比三种磁极偏移方式下的转矩及径向力,确定出最优的磁极偏移方式;最后,对对称V型磁极、非对称V型磁极和非对称V型磁极偏移三种转子结构的转矩脉动、齿槽转矩及气隙磁密高次谐波分别进行仿真实验和比较。实验结果表明,非对称V型磁极偏移结构转矩脉动降低约14%,齿槽转矩降低约78.7%,气隙磁密5、7谐波最小,所提结构能有效抑制转矩脉动,提升电机性能。
When the traction locomotive adopts the interior permanent magnet synchronous motor(IPMSM),the torque ripple is too large,which causes vibration and noise,and thus affecting the system performance.To solve the problem of large torque ripple in IPMSM,an asymmetric V-type magnetic pole offset structure is proposed.Secondly,based on the theory of winding function and the method of equivalent magnetic circuit,the expressions of stator and rotor magnetomotive force were derived respectively,and the analytical model of torque ripple is obtained combing with Lorentz law.Finally,the torque ripple,cogging torque and high order harmonics of air gap magnetic-density were simulated and compared in three kinds of rotor structures:symmetrical V-pole,asymmetric V-pole and asymmetric V-type magnetic pole offset.The experimental results show that the torque ripple of the asymmetric V-type magnetic pole offset structure is reduced by about 14%;the cogging torque is reduced by about 78.7%;the air gap flux density is minimized by 5 and 7 harmonics.The proposed structure can effectively suppress the torque ripple and improve the motor performance.
作者
高锋阳
李晓峰
齐晓东
陶彩霞
高鹏
GAO Feng-yang;LI Xiao-feng;QI Xiao-dong;TAO Cai-xia;GAO Peng(Institute of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070;School of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2021年第9期112-120,共9页
Electric Machines and Control
基金
国家重点研发计划(2018YFB1201602-06)。
关键词
内置式永磁同步电机
绕组函数理论
转矩脉动
径向力
齿槽转矩
气隙磁密
interior permanent magnet synchronous motor
the theory of winding function
torque ripple
radial force
cogging torque
air gap flux density
