异步电动机电磁参数引起的失稳振荡的分析  

Investigation of Self-Excited Oscillation of Asynchronous Motor Caused by Electric-Magnetic Parameters

作　　者：牛西泽[1] 邱家俊[1] 

机构地区：[1]天津大学机械工程学院力学系,天津300072

出　　处：《振动工程学报》2001年第4期373-377,共5页Journal of Vibration Engineering

基　　金："973"专项经费资助项目 (编号 :G19980 2 0 319)

摘　　要：交流异步电动机的失稳自激振荡 ,会引起较大的有害机械振动 ,并使电机电流、功率的波动增大 ,超过许可值 ,因而烧毁电机和电气设备。本文建立了电动机的机电耦联振动方程组 ,经过变换得到了无周期系数的标幺化非线性方程组 ,采用 Hopf分叉理论研究了系统电磁参数变化引起的自激振荡 ,指出了系统失稳的数学机理及其变化规律 ;给出了相应的数值计算结果 ,并进行了实验研究 ,实验结果与理论计算结果相吻合。Self-excited oscillation of asynchronous motor can cause harmful mechanical vibration and increase the fluctuation of electric current and power, so it may damage the motor and related devices. In this paper, nonlinear model with electric and mechanical coupling of a motor system is established and then transformed into ODE equations without time-varying parameters. Hopf bifurcation theory is used to analysis the self-excited oscillation of the system caused by the variation of electric-magnetic parameters, which gives a reasonable mathematical explanation of the mechanism of the oscillation. Simulation and experimental results show consistence with the theoretical conclusions.

关 键 词：异步电动机 失稳自激振动 非线性振动 Hopt分叉理论 电磁参数变化 机械振动 

分 类 号：TM343[电气工程—电机] O323[理学—一般力学与力学基础]