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Wyszukujesz frazę "rotor fault" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Rotor fault detector of the converter-fed induction motor based on RBF neural network
    Autorzy:
    Kowalski, C. T.
    Kaminski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200439.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    induction motor
    rotor fault
    diagnostic symptom
    RBF neural network
    fault detector
    Opis:
    This paper deals with the application of the Radial Basis Function (RBF) networks for the induction motor fault detection. The rotor faults are analysed and fault symptoms are described. Next the main stages of the design methodology of the RBF-based neural detectors are described. These networks are trained and tested using measurement data of the stator current (MCSA). The efficiency of developed RBF-NN detectors is evaluated. Furthermore, influence of neural networks complexity and parameters of the RBF activation function on the quality of data classification is shown. The presented neural detectors are tested with measurement data obtained in the laboratory setup containing the converter-fed induction motor (IM) and changeable rotors with a different degree of damages.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 69-76
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Main inductances of induction motor for diagnostically specialized mathematical models
    Autorzy:
    Węgiel, T.
    Weinreb, K.
    Sułowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/141392.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silnik indukcyjny
    uszkodzenie wirnika
    diagnostyka
    ekscentryczność wirnika
    wirnik
    induction motors
    rotor fault diagnosis
    rotor eccentricity
    Opis:
    In the paper modeling of main inductances for mathematical models of induction motors is applied to study the effects caused by a rotor eccentricity and saturation effects. All three possible types of eccentricity: static, dynamic and mixed are modeled. The most important parameters describing rotor eccentricity include self and mutual inductances of the windings. The structural changes of the permeance function as a result of eccentricity appearance and the Fourier spectra of inductances in occurrence of saturation for each case are determined in the paper. The presented algorithm can be used for the diagnostically specialized models of induction motors.
    Źródło:
    Archives of Electrical Engineering; 2010, 59, 1-2; 51-66
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibration measurement for crack and rub detection in rotors
    Autorzy:
    Hajnayeb, Ali
    Shirazi, Kourosh Heidari
    Aghaamiri, Reza
    Powiązania:
    https://bibliotekanauki.pl/articles/220975.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rotor vibrations
    crack
    rub
    fault detection
    chaos features
    largest Lyapunov exponent
    approximate entropy
    correlation dimension
    Opis:
    Shaft-stator rub and cracks on rotors, which have devastating effects on the industrial equipment, cause non-linear and in some cases chaotic lateral vibrations. On the other hand, vibrations caused by machinery fault scan be torsional in cases such as rub. Therefore, a combined analysis of lateral and torsional vibrations and extraction of chaotic features from these vibrations is an effective approach for rotor vibration monitoring. In this study, lateral and torsional vibrations of rotors have been examined for detecting cracks and rub. For this purpose, by preparing a laboratory model, the lateral vibrations of a system with crack and rub have been acquired. After that, a practical method for measuring the torsional vibrations of the system is introduced. By designing and installing this measurement system, practical test data were acquired on the laboratory setup. Then, the method of phase space reconstruction was used to examine the effect of faults on the chaotic behaviour of the system. In order to diagnose the faults based on the chaotic behaviour of the system, largest Lyapunov exponent (LLE), approximate entropy (ApEn) and correlation dimension were calculated for a healthy system and also for a system with rub and a crack. Finally, by applying these parameters, the chaotic feature space is introduced in order to diagnose the intentionally created faults. The results show that in this space, the distinction between the various defects in the system can be clearly identified, which enables to use this method in fault diagnosis of rotating machinery.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 1; 65-80
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of fault-tolerant performance of a segmented rotor SRM and a conventional SRM
    Autorzy:
    Sun, X.
    Xue, Z.
    Han, S.
    Chen, L.
    Xu, X.
    Yang, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/200893.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fault tolerance
    segmented rotor SRM
    phase failure
    finite element method
    dynamic performance
    rotor segmentowy SRM
    metoda elementów skończonych
    wydajność dynamiczna
    tolerancja błędu
    awaria jednej fazy
    Opis:
    Due to the separation of magnetic field, electrical isolation and thermal isolation, motor drives possess a high fault-tolerance characteristic. In this paper, comparative study of mutual inductance between the proposed segmented rotor switched reluctance motor (SSRM) and the conventional switched reluctance motor (SRM) is carried out first, illustrating that the proposed SSRM has less mutual inductance between phases than the conventional SRM. In addition, if winding faults or power converter faults lead to phase failure, a comparative analysis on fault-tolerant performance under phase failure condition between the proposed SSRM and the conventional SRM is simulated in detail using the finite element method (FEM). Simulation results reveal that dynamic performance of the proposed SSRM, including output torque and phase current, is better than that of the conventional SRM. That is, the capacity of operating with the fault under phase failure condition in the proposed SSRM is superior to that in the conventional SRM.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 3; 375-381
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of closed loop control on diagnostic indices in different faults of squirrel cage induction motor
    Autorzy:
    Bouabid, Nourelhouda
    Moussa, Mohamed-Amine
    Maouche, Yassine
    Khezzar, Abdelmalek
    Powiązania:
    https://bibliotekanauki.pl/articles/1955204.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    closed loop control
    discrete Fourier transformation
    fault diagnostic
    indirect filed control
    rotor mechanical faults
    squirrel cage induction motor
    sterowanie w pętli zamkniętej
    dyskretna transformacja Fouriera
    diagnostyka błędów
    sterowanie pośrednie złożone
    usterki mechaniczne wirnika
    silnik indukcyjny klatkowy
    Opis:
    The aim of this work is to study the influence of closed loop control on diagnostic indices of both broken bar and mixed air-gap eccentricity fault indices of the squirrel cage induction motor drive. The present work is focused on the direct stator current isd signal analysis, which is independent of torque load when the induction motor is controlled by an indirect control field. The fault signatures are on the line extracted from the direct stator current signal using the discrete Fourier transformation (DFT). The formula of the measured direct stator current at both conditions is determined by the transfer function of the current loop. The obtained results show that the current loop corresponds to a low pass filter and can reduce the magnitude of diagnostic indicators which lead to wrong evaluation of the fault. Simulation and experiments were carried out in order to confirm the theoretical analysis.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 4; 943-958
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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