In the paper it was developed indexes for evaluation induction motor (IM) current operational conditions basing on electrical signals analysis. Basing on these indexes it were derived logical rules for evaluation IM operational conditions, which were laid down in the basic of algorithm for IM monitoring system. It were developed related software for monitoring system, and it was conducted experimental verification, which confirmed possibility of use derived indexes and logical rules for evaluation current IM operational conditions.
Słowa kluczowe: electrical signals analysis, monitoring, diagnostics, software.
W artykule opracowano wskaźniki do ewaluacji bieżących warunków działania silnika indukcyjnego bazujące na analizie sygnałów elektrycznych. Bazując na tych wskaźnikach wyprowadzone zostały logiczne zasady ewaluacji warunków działania silnika indukcyjnego, stanowiące podwaliny do budowy algorytmu monitorowania sinika indukcyjnego. Opracowany został program monitorujący oraz przeprowadzono weryfikację eksperymentalna, która potwierdziła możliwość użycia wyprowadzonych wskaźników i logicznych zasad ewaluacji bieżących warunków działania silnika indukcyjnego.
Keywords: analiza sygnałów elektrycznych, monitorowanie, diagnostyka, oprogramowanie
Modern technologies allow one ensure comprehensive control of production operation, which increase its reliability and efficiency. However, sudden failures of operational equipment could lead to production breaks, which, in turn, lead to financial losses. As induction motors (IM) are used to drive predominant number of actuating mechanisms, theirs failures cause most significant financial losses and could lead to failure of other industrial equipment. In order to avoid significant financial losses due to production stoppage because of sudden IM failure it is reasonable to use monitoring systems at important parts of production process. Such systems should use data for analysis which could be easily measured and don’t need expensive additional equipment. The best choice, in this case, is collection data from electrical signals for further analysis. As it was stated in , induction motor diagnostics and monitoring, as well as its life forecast and necessity of maintenance, could be done basing on analysis of electrical energy transformation process. One of the features describing energy processes in IM is its power consumption. This signal is quite suitable to be chosen as a basis for IM diagnostic and monitoring system, as it doesn’t require suspension of production, and needs only motor’s measured currents and voltages, while all the rest necessary features could be computed indirectly. Moreover, power spectra signal analysis is more reliable than current spectra analysis and contain additional information which could be used for evaluation current motor technical conditions . In  it were derived mathematical expressions for determination power spectra frequencies related to most frequently caused IM damages. However, low-quality of supply mains, electrical disturbances and simultaneous presence of several damage types could cause difficulties in diagnostics basing on these frequencies. Thus, ther [...]
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