DETECTING DEVELOPING DEFECTS IN ELECTRIC DRIVE MOTOR WINDINGS THROUGH MULTI-PARAMETER MONITORING OF INSULATION CONDITION

Abstract

The process of detecting insulation faults in motor windings is one of the key tasks of technical diagnostics aimed at ensuring the reliability and safety of electric machines. Along with technical monitoring tools, the human factor also plays an important role in this process, influencing the quality of diagnostic procedures and the decision-making based on measurement results.The service life of electric motors used in various production processes depends largely on the condition of the winding insulation. Damage to the insulation can lead to emergency situations. This article discusses how to assess the condition of winding insulation and identify defects in the early stages of operation. We present a multiparameter control method for detecting developing defects in the stator windings of electric drive motors. This method is based on assessing insulation resistance, capacitance, dielectric loss tangent, voltage recovery time, and dielectric absorption coefficient. To determine the criteria that characterize the winding condition, an equivalent circuit of the insulation system was proposed, and experimental studies were conducted. The characteristic parameters of the insulation of the phase windings of one of the motors were examined at temperatures of 100°, 120°, 130° and 140°C. Analysis of the results shows that a comprehensive approach to assessing the insulation state of electric drive motors that takes climatic factors into account increases the reliability of the equipment and improves operation and maintenance processes. These results can be used to develop intelligent systems for monitoring and diagnosing electric drive motors.