永磁同步电机系统非线性动态特性分析  

Nonlinear dynamic characteristics analysis on the permanent magnet synchronous motor system

作　　者：靳岚[1] 曾鑫磊 Jin Lan;Zeng Xinlei(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Gansu Lanzhou,730050,China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《机械设计与制造工程》2025年第1期117-123,共7页Machine Design and Manufacturing Engineering

基　　金：国家自然科学基金(51965035)。

摘　　要：为减弱永磁同步电机内置电机转子与定子之间的气隙分布不均引起的偏心,造成的高速电主轴动态特性的非线性变化,基于复合偏心影响下不平衡磁拉力模型,建立永磁同步电机模型及其运动微分方程。采用数值模拟方法分析发生气隙偏心时电机系统的动态特性,通过分岔图、轴心轨迹图和频谱图等方法对高速电主轴内置电机系统的非线性振动特性进行研究。结果表明,随着转速增大,电机转子的回转半径呈现先增大后减小的趋势,增大静偏心会导致回转半径峰值后移,但随着静偏心增大,系统峰值也逐渐增大。To attenuate the nonlinear changes in the dynamic characteristics of the high-speed motor spindle caused by the eccentricity and the uneven distribution of the air gap between the rotor and the stator of the permanent magnet synchronous motor built-in motor,a model of the permanent magnet synchronous motor and its differential equations of motion are established based on the model of the unbalanced magnetic tension under the influence of the compound eccentricity.Numerical simulation methods are used to analyze the dynamic characteristics of the motor system when air gap eccentricity occurs,and the nonlinear vibration characteristics of the built-in motor system of the high-speed electric spindle are investigated by bifurcation diagrams,axial trajectory diagrams and spectrograms.The results show that,with the increase of rotational speed,the rotary radius of the motor rotor shows a trend of increasing and then decreasing,and increasing the static eccentricity,leading to the backward shift of the peak value of the rotary radius,but with the increase of the static eccentricity,the peak value of the system is also gradually increased.

关 键 词：永磁同步电机 动态特性 气隙偏心 非线性振动 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]