Monitoring and diagnostic methods for eccentricity faults in the induction motor

摘要

This work concerns the monitoring and diagnosis of eccentricity faults in induction motors. The success of the type of electric motors is mainly due to its simplicity of construction, mechanical robustness, and low cost of manufacturing. Therefore, it is frequently used in industrial applications. These engines are subjected during operation to different kinds of constraints (thermal, electrical, magnetic, mechanical and environmental). The accumulation of these constraints leads to defects in different parts of the engine, which results in lost production and costly repairs. The monitoring and diagnosis of faults have become major necessities to detect failure of electric motors. In this paper, we develop an approach for the detection and diagnosis of faults eccentricities in induction motors. To this end, we build models for each mode of engine operation (normal operation and faulty behaviors). We detect on line the faults with the analysis of residuals obtained from the reference model. We diagnose the faults by the analysis of residuals obtained from faulty models.