低阶谐波相位对异步牵引电机振动的影响

Influence of Phase Angle of Low-order Harmonics on Vibration of the Asynchronous Traction Motor

随着高铁的高速发展,异步牵引电机的振动噪声问题近年来已得到了广泛的关注和研究。本文重点探究了低阶谐波相位对异步电机电磁力波的影响。利用等效电路定性分析了考虑谐波后定转子侧电流相位的关系。对一台异步牵引电机进行电磁力分析,通过二维傅里叶分析提取电磁力波主要阶次和频率,分析了三阶主要电磁力波随谐波相位的变化。最后通过有限元仿真得到不同谐波相位下的电机振动情况,表明在空间阶次较低的情况下,电机振动和电磁力波与谐波相位的关系具有一致性。

With the rapid development of high-speed railway,the vibration and noise problem of asynchronous traction motor has been widely concerned and studied in recent years.This paper focused on the influence 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 electromagnetic force of an asynchronous traction motor was analyzed.The main order and frequency of electromagnetic force wave were extracted by two-dimensional Fourier analysis.The variation of third order main electromagnetic force wave with harmonic phase was analyzed.Finally,the motor vibration under different harmonic phase was obtained by finite element simulation,which showed that the relationship between motor vibration and electromagnetic force wave and harmonic phase is consistent under low spatial order.