Abstract
Electric motors today are represented in all branches of industry and their supervision is a very complex task to research. Improper maintenance and proper checking of electric motors can cause great damage to the drive. In order to determine the condition of electric motors, it is necessary to perform diagnostics of basic parameters in order to determine the reliability and thus the service life of the motor. This is why fault diagnosis is important for the maintenance of electrical machines. The assessment of the condition of the correctness and reliability of the electrical machine is carried out by the method of measuring the basic parameters. The measured data is compared with the nominal data of the correct motor provided by the manufacturer. Diagnostic measurements are performed on the measurement of winding operating resistance, winding impedance, temperature, current, voltage, power, torque, speed of noise and vibration. The measurement is performed for all three operating conditions: no load, nominal and maximum load. Spectral analysis of these quantities gives a picture of the electromechanical state of the motor. For example, the mechanical state of a motor can be determined from the frequency spectrum of noise and vibration, and the condition of each mechanical part can be estimated on the basis of individual harmonics. The analysis of the measured data provides an assessment of reliability and suggests the method and time of servicing. By applying the appropriate sensors and placing them in the right places, the required sizes can be measured quickly and efficiently, and thus the condition of the motor can be assessed. Non-contact measurement of parameters such as temperature, noise, vibration, current, voltage, speed creates a basis for the development of an automated measuring system, which significantly speeds up and facilitates the assessment of reliability and correctness, especially when it comes to a large number of motors. Proper and periodic measurement as well as proper maintenance can extend motor life and result in increased productivity and financial savings. This paper presents the procedures for measuring the required quantities and making an assessment of reliability and correctness on the same type of motor with a different number of operating hours.
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Ćorluka, V. (2022). Procedures for Testing and Maintenance of Electric Motors for the Purpose of Determining the Correctness and Reliability at Operating Conditions. In: Glavaš, H., Hadzima-Nyarko, M., Karakašić, M., Ademović, N., Avdaković, S. (eds) 30th International Conference on Organization and Technology of Maintenance (OTO 2021). OTO 2021. Lecture Notes in Networks and Systems, vol 369. Springer, Cham. https://doi.org/10.1007/978-3-030-92851-3_11
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DOI: https://doi.org/10.1007/978-3-030-92851-3_11
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