感应电机等效磁路模型及转子偏心分析  

Equivalent Magnetic Circuit Model and Rotor Eccentricity Analysis of Induction Moto

作　　者：刘官瑞 LIU Guanrui(School of Mechanical,Electrical and Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400000)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400000

出　　处：《现代制造技术与装备》2021年第4期140-142,共3页Modern Manufacturing Technology and Equipment

摘　　要：鼠笼感应电机在现代机械设备中得到了广泛应用。在电机的设计初期,假设气隙均匀。然而,由于制造误差和装配误差的影响,电机转子的运动中心与定子中心相偏移,引起的不平衡磁拉力使两者中心更加远离。基于此,结合电机等效磁路(Magnetic Circuit,MEC)模型和Jeffcott转子模型,建立了电机转子偏心机电耦合模型。通过数值求解的方法获得机电耦合系统的动态特性,包括电机电气特性和电机转子的非线性运动,为进一步设计电机和检测电机转子偏心故障奠定了基础。Squirrel cage induction motor has been widely used in modern mechanical equipment.The air gap is assumed to be uniform at the beginning of the design of the motor.However,due to the influence of manufacturing error and assembly error,the motion center of the motor rotor and the stator center are offset,resulting in unbalanced magnetic pull,which makes the two centers farther away.Based on the equivalent Magnetic Circuit(MEC)model and Jeffcott rotor model,the electromechanical coupling model of motor rotor eccentricity is established.The dynamic characteristics of the electromechanical coupling system,including the electrical characteristics of the motor and the nonlinear motion of the motor rotor,are obtained by the numerical method,which lays a foundation for the further design of the motor and the detection of the motor rotor eccentricity fault.

关 键 词：等效磁路 鼠笼感应电机 转子偏心 故障检测 不平衡磁拉力 

分 类 号：TM346[电气工程—电机]