Electromagnetic racial force analysis of asynchronous motors under static eccentricity

ZHU Hai-feng， ZHU Chang-sheng
（College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： Aiming at the vibration and noise caused by the racial force when asynchronous motor with rotor static eccentricity，the combination of approximate analytic and numerical analysis was presented here based on the finite element method（FEM）to clarify the characteristics of electromagnetic racial force. Firstly，frequency components and order of the asynchronous motor was determined by the approximate analytical method. Then，the frequency and order were corrected by ANSYS software and FFT method，and the value of the force was also determined. The results indicate that the combination of the theory algorithm and finite element method can make an accurate analysis of the distribution of electromagnetic racial force in asynchronous motors under static eccentricity.
Key words： asynchronous motors； static eccentricity； electromagnetic racial force