Presentation of a Condition Monitoring System for a Three-Phase Wound-Rotor Asynchronous Motor and Analysis of Stator-Rotor Current Spectrum with Signal Analysis Safety Aspects

Abstract

DOI: https://doi.org/10.12700/btsz.2025.7.3.75

The condition monitoring of electrical machines holds outstanding importance in modern industry. Although the three-phase wound-rotor asynchronous motor is less frequently used nowadays, it remains advantageous in applications requiring high starting torque, such as crane drives. Due to its specific structure involving sliding contacts, it is particularly sensitive to various faults, making early detection essential. The system examined in this study is based on the spectral analysis of stator and rotor currents. Through spectral analysis, characteristic faults such as broken rotor bars or eccentricity can be identified. The application of Fourier analysis helps extract useful information from the measured signals. The aim of the research is to present an efficient condition monitoring system suitable for industrial applications. The purpose of this paper is to introduce the structure of the proposed monitoring system, the methodology of spectral analysis, and the importance of signal quality in safety-critical environments. Ultimately, the research contributes to improving the operational safety and maintenance strategies of wound-rotor asynchronous motors.