Realizace laboratorního standu pro online diagnostiku asynchronního motoru

Abstract

This diploma thesis deals with the design and implementation of a laboratory test stand intended for online diagnostics of an induction motor. The theoretical part briefly describes the operating principles of the induction motor, its basic construction, and the most common faults that may occur during operation. Furthermore, an overview of diagnostic methods is presented, with a focus on the MCSA method, which is based on the analysis of stator current in the frequency domain. The practical part of the thesis is focused on the design of a laboratory test stand using SolidWorks software. The functionality of the design was verified using the ANSYS Maxwell simulation tool. Subsequently, the test stand was constructed and used for experimental measurements. The experiments were aimed at detecting rotor bar faults and rotor eccentricity. Measurements were carried out both under no-load conditions and under load using a dynamometer. The measured signals were processed and evaluated in terms of characteristic frequency components using the TiePie software. The measurement results confirmed that the MCSA method is suitable for detecting faults in induction motors. Furthermore, the influence of motor load on the frequency composition of the signal was observed, as well as the effect of interference, for example from a frequency converter, on the quality of the measured spectrum.