转子混合偏心对低速大转矩永磁同步电动机的影响  

Influence of hybrid eccentricity of rotor on low-speed and high-torque permanent magnet synchronous motor

作　　者：张炳义[1] 刘振清 Zhang Bingyi;Liu Zhenqing(Shenyang University of Technology,Shenyang 110870)

机构地区：[1]沈阳工业大学

出　　处：《电气技术》2019年第8期23-27,共5页Electrical Engineering

摘　　要：本文首先分析永磁同步电动机(PMSM)的转子混合偏心形式和偏心成因,然后建立凸极转子混合偏心状态的凸极永磁同步电动机模型进行仿真研究。研究结果表明,永磁电动机转子混合偏心后,气隙磁密分布变化明显,反电势下降,造成负载电流增加,电动机电磁振动噪声增大;车削电动机转子外圆后反电势进一步减小,负载电流增加,电动机电磁振动噪声变化不显著。转子结构方面,转子偏心后不平衡磁拉力造成转子循环应力,降低疲劳寿命,车削转子外圆后,削弱不平衡磁拉力带来的转子循环应力,有益于增加电动机的疲劳寿命。This paper analyzed the hybrid eccentric form and eccentricity of the permanent magnet synchronous motor(PMSM).Then the performance of the salient-pole permanent magnet synchronous motor model with rotor hybrid eccentricity is studied.The research results show that after the eccentric permanent magnet motor rotor is hybrid eccentric,the air gap magnetic density distribution changes obviously,the back electromotive force decreases,the load current increases,and the electromagnetic vibration noise increases.After turning the outer circumference of the rotor,the back electromotive force decreases,the load current increases,and the electromagnetic vibration noise is not significantly changed.In terms of rotor structure,the unbalanced magnetic pull force generated by the eccentric rotor causes cyclic stress,which reduces the fatigue life of the motor.After turning the outer circle of the rotor,the cyclic stress is weakened,which is beneficial to increase the fatigue life of the motor.

关 键 词：永磁同步电动机 低速大转矩 转子混合偏心 振动噪声 疲劳寿命 

分 类 号：TM341[电气工程—电机]