谐波对感应电机振动影响研究

Research of the Influence of Harmonic on Induction Motor Core Vibration

为了研究实际工况下感应电机的振动情况,对不同谐波参与下硅钢片的磁化特性和磁致伸缩特性进行测量。基于测得的本构关系,建立电机铁心的电磁-机械多场耦合模型。考虑电磁力和硅钢片的磁致伸缩效应,进行感应电机在不同谐波参与下电磁场和机械场的数值计算,以得到磁密、应力和振动的分布情况,进而分析谐波对电机铁心振动的影响,为减少感应电机的振动噪声提供有力的理论依据与计算方法。

In order to study the vibration and noise of the induction motor under practical working conditions, a database of magnetization and magnetostrictive curves of silicon steel under different harmonic excitations was tested. Based on the measured constitutive relations, an electromagneto-mechanical coupled numerical model for the motor core was presented. Considering the electromagnetic force and magnetostriction effect of silicon steel, the magnetic field and mechanical field were calculated for the induction motor. The distribution of the magnetic flux density, stress and vibration of the motor were obtained from the calculation. And the influence of different harmonics on the vibration was analyzed, which provided the theoretical basis for vibration and noise reduction of induction motors.