O możliwości wczesnego wykrywania pęknięć prętów klatki wirnika podczas pracy maszyny asynchronicznej

• Autorzy: Strycharz J.

Warianty tytułu

EN

About cage bars crack early discovering possibility during induction motor work

• Konferencja: Problemy eksploatacji maszyn i napędów elektrycznych (2005; Ustroń, Polska)
• Języki publikacji: PL

Abstrakty

EN

Some utilizing possibilities of induction motor stator phase current vector function hodographs as diagnostic signals to rotor cage bars (rings) ruptures early discovering during machine work have been described in the paper. As a result of rotor asymmetry, caused by cage bars ruptures, some (1 š2ks)f frequency band currents are induced in the stator, which are overlapping current base frequency (L=50Hz) component. In cases of rotor damages, hodograph course is deformed, comparing to not damaged motor hodograph course. Hodograph deformations, characteristic for rotor bar ruptures have been illustrated by a lot of oscillograph records received during laboratory investigations. These investigations have been carried out for damaged motor feeding cases by voltages from power network and from voltage frequency changers. Hodograph deformations characteristic features for rotor bars damage cases are also seen during simultaneous appearance of other dis-turbances as, for example, impedance asymmetry in one of phases or feeding voltages. It's properly to remark that with the number of ruptured bars the diagnostic signal value and its pulsation can diminished and even lesser values can be received then for little number of ruptured bars. For this reason it's useful to carry out the best continuous or from time to time cage bars control (monitoring), because it permits to discover damages already in initial stadium and by this to exclusion next bar damages and serious machine damages appearance. Diagnostic method proposed should be numbered to non invaded methods. In the solution, which is based on observation and evaluation of motor stator phase current hodographs, could be approved generally machine current measuring system which exist in industrial systems.

Słowa kluczowe

PL

klatka wirnika; wirnik; maszyny asynchroniczne; maszyny indukcyjne; diagnostyka

• Wydawca: Sieć Badawcza Łukasiewicz - Górnośląski Instytut Technologiczny
• Czasopismo: Maszyny Elektryczne : zeszyty problemowe
• Rocznik: 2005
• Tom: Nr 71
• Strony: 91--96
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Strycharz J.

• AGH Kraków

Bibliografia

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• [3]. Nejjari H., Benbouzid M.E.H.: Monitoring and diagnosis of induction motors electrical faults using a current Park’s vector pattern learning approach. IEEE Transactions On Industry Applications, Vol.36, No 3, May/June 2000, pp. 730-735.
• [4]. Rams W., Rusek J.: Wyniki pomiarów i obliczeń sygnału diagnostycznego (1-2s)f0 silników indukcyjnych klatkowych. Jakość i Użytkowanie Energii Elektrycznej, t.IV, z.1, 1998, s. 53-57.
• [5]. Strycharz J.: Sposób i układ do wykrywania uszkodzeń klatki wirnika silnika indukcyjnego. Zgłoszenie w Urzędzie Patentowym RP, nr P 331653, 24.02.1999.
• [6]. Strycharz J.: Hodografy funkcji wektorowej prądów stojana jako elementy diagnostyki klatek silników indukcyjnych. Sprawozdania z Posiedzeń Komisji Naukowych. PAN, Oddział w Krakowie. T XLIII/2. Wyd. „Secesja”, Kraków, 2001, s. 64 -65.
• [7]. Zidani F., Benbouzid M.E.H., Diallo D., Nait- Said M.S.: Induction motor stator faults diagnosis by a current Concordia pattern-based fuzzy decision system. IEEE Transactions On Energy Conversion, Vol.18, No 4, Dec. 2003, pp. 469-475.