Abstract
The vibration of high speed motorized spindle directly influences the processing quality; through the finite element method, the dynamic magnetic coupling model of high speed motorized spindle rotor system is established. The coupling relationship between the field parameters of electromagnetic and the characteristics of dynamic are considered. At the same time, the influence of electromagnetic coupled on the dynamic vibration characteristics of the rotor system is analysed and the experimental verification is carried out. The results indicate the stator and rotor magnetic density, the magnetic field energy distribution about motorized spindle are also periodic. The skin effect of magnetic field and air gap eccentricity have great influence on radial vibration. With the increase of speed, the centrifugal force of the bearing is increasing; the softening effect of bearing stiffness is obvious; the natural frequency is decreasing; the amplitude of vibration is increasing. The experimental results are in good agreement with the simulation results. The accuracy of the dynamic magnetic coupling model is illustrated.
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