Influence of Phase Angle of Low-order Harmonics on Vibration of the Asynchronous Traction Motor
With the rapid development of high-speed railway,the vibration and noise problem of asyn-chronous traction motor has been widely concerned and studied in recent years.This paper focused on the in-fluence of low-order harmonic phase on electromagnetic force wave of the motor.The relationship between stator and rotor current phase after harmonic was analyzed qualitatively by equivalent circuit.The electro-magnetic force of an asynchronous traction motor was analyzed.The main order and frequency of electromag-netic force wave were extracted by two-dimensional Fourier analysis.The variation of third order main elec-tromagnetic force wave with harmonic phase was analyzed.Finally,the motor vibration under different har-monic phase was obtained by finite element simulation,which showed that the relationship between motor vi-bration and electromagnetic force wave and harmonic phase is consistent under low spatial order.