Performance Analysis and Fault Classification in a Large Electric Motor Using Vibration Assessment Technique

Abstract

This research paper presents an analysis of electric motors performance by the assessment of vibration characteristics caused by bearing faults, housing bearing looseness and rotor unbalance. In this study, an analysis of fault that occurred in electric motor has followed ISO 10816-3 Standard. Bring the used electric motors for testing and measuring the vibration of the electric motors by using the Spectrum Analysis & Field Balancing Analyzer model ADASH A440-VA4 Pro. The vibration results of 22kW, 55kW and 75kW motor imply the malfunction of bearing faults, housing bearing looseness, and rotor unbalance. The results obtained from the analysis will be used as references and guidelines for predictions of faults in the electric motors, including maintenance scheduling of electric motors.

Structural diagram of the built-in diagnostic system for electric drives of vehicles

“…The unbalance of the rotating masses of an induction motor leads to vibration [19]. Regardless of the causes of occurrence, according to their external signs, the specifics of manifestation in the overall picture of vibration, all unbalances can be divided into two typesstatic unbalance and dynamic unbalance.…”

Analysis of the features of application of vibration diagnostic methods of induction motors of transportation infrastructure using mathematical modeling

“…Monitoring and diagnostic systems based on these methods ensure the extraction of informative features from the measured signal and the registration of their exceeding the limit values that must be available for comparison for the entire range of motors used. In [10], an analysis of the operation of electric motors is presented by assessing the vibration characteristics caused by bearing failures, looseness of case bearings and rotor imbalance, and in [11] a method for diagnosing traction electric drives based on vibration levels is developed. For what the value of permissible vibration accelerations of electric machines of electric buses is determined, allowing to evaluate their technical level.…”