Nieinwazyjna diagnostyka wirnika maszyny asynchronicznej / Konrad Weinreb, Tomasz Węgiel, Maciej Sułowicz // Maszyny Elektryczne : zeszyty problemowe. – 2004, Nr 69, s. 35-40 : wykr. – Bibliogr. ... więcej

Nieinwazyjna diagnostyka wirnika maszyny asynchronicznej / Konrad Weinreb, Tomasz Węgiel, Maciej Sułowicz // Maszyny Elektryczne : zeszyty problemowe. – 2004, Nr 69, s. 35-40 : wykr. – Bibliogr. 5 poz., Abstr. – Tyt. streszcz.: Noninvasive diagnostics of rotor in asynchronous motor. – Mat. konf.: PEMINE : Problemy Eksploatacji Maszyn i Napędów Elektrycznych : XIII Seminarium Techniczne BOBRME Komel, Ustroń-Jaszowiec, 19-21.05.2004. – ISSN 0239-3646

Paper presents the non-invasive method of complex estimation of rotor state for cage induction motors, based on analysis of stator winding currents. FFT amplitude spectral analysis is usually applied for ... więcej

Paper presents the non-invasive method of complex estimation of rotor state for cage induction motors, based on analysis of stator winding currents. FFT amplitude spectral analysis is usually applied for the stator current in chosen phase. Such approach is correct if the estimation concerns only the cases electrical cage asymmetry or dynamic eccentricity. The simultaneous appearance air-gap and cage asymmetry or static eccentricity and asymmetry of supply voltage makes correction quantitative analyze impossible. To minimize these difficulties the increase of the numbers of diagnostic signals (measure currents in three phases) and better use of information from diagnostic signals (use phase spectrum of current) is necessary. This paper deal with this problem. The stator phase currents in steady state are calculated by a harmonic balance method. The results show that there are important differences in the amplitude and phase spectrum of stator currents, which can be utilized for rotor condition monitoring and diagnostic purposes.