Vibration analysis of induction motors with unbalanced loads

摘要

One of the factors that cause the failure of induction motors which are used intensively in industry is the unbalanced loading of the motor. In this paper, a system to simulate the unbalanced loading condition of a three-phase squirrel cage induction motor was designed. The stator current and vibration signals of the motor were recorded. The vibration signals under balanced and unbalanced loading conditions were recorded with an accelerometer which was mounted on the motor housing. The stator current and vibrations signals were analyzed with Power Spectral Density (PSD). The results shows that the system can be used to simulate the effects of the unbalanced loading conditions of the induction motors.