Nonlinear dynamic characteristics analysis on the permanent magnet synchronous motor system
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 per-manent 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 character-istics 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 dia-grams and spectrograms.The results show that,with the increase of rotational speed,the rotary radius of the mo-tor 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.
万方数据
维普
