Vibration and Current Monitoring for Fault’s Diagnosis of Induction Motors

In generally, detection and diagnosis of incipient faults is desirable for product quality assurance and improved operational efficiency of induction motors running off the power supply mains. In this paper, the vibration and current of an induction motor are analyzed in order to obtain information for the detection of bearing faults. Significant vibration and current spectrum differences between healthy motor and motors with fault bearing are observed. The highfrequency spectral analysis of vibration and current provides a method to detect bearing faults. The effectiveness of the diagnosis system is demonstrated through staged motor faults of electrical and mechanical origin. The developed system is scalable to power ratings and it has been successfully demonstrated with data from 0.75 kW induction motor.