电机疑难故障原因分析及解决措施

Reason Analysis for Difficult Troubles of Motor and Its Solution

针对电机带动负载时出现转速下降或堵转,导致电流增大的问题,通过理论分析与详细检查,确定原因为电机的转子在安装时出现了定子轴向位移,导致电机磁通量减少,电磁转矩下降,出现"小马拉大车"现象,电机无法拖动负载,最终导致了故障现象的产生。通过对转子发生轴向位移的轴承位置的调整,解除了故障,恢复了正常生产。

When motor drove loading,the descent of rotation speed or locked-rotor state were occurring,which caused current increase.Based on theoretical analysis and detailed inspection,it found that the reason is the axial displacement was occurring in stator while installing motor rotor,which lead to reduction of magnetic flux and descent of electromagnetic torque,then the phenomenon of lower-power matched with higher-payload appeared,the motor can＇t control loading,and finally the faults emerged.By adjusting the position of bearings for axial displacement of rotor,the faults were discharged,and the normal production was recovered.