Wpływ zasilania napięciem odkształconym na widmo prądów stojana silników klatkowych

• Autorzy: Dybowski P.

Warianty tytułu

EN

Influence of non-sinusoidal voltage supply on harmonic spectrum of stator currents of induction machines

• Konferencja: Problemy eksploatacji maszyn i napędów elektrycznych (2003; Ustroń, Polska)
• Języki publikacji: PL

Abstrakty

EN

Voltage from power system consists of 50Hz base harmonic and high harmonics. In this time more inductance motors are supplying by non-sinusoidal voltage. In diagnostics of induction motors we use harmonics of stator current (1š2sf(o)) as diagnostic signals. In this paper I'm going to answer a question: how big is an influence of non-sinusoidal voltage supply on harmonic spectrum of stator currents of induction machines? Is non-sinusoidal voltage supply disturbing in diagnostics by (1š2sf(o)) harmonics of stator currents? I'm going to present results of calculations and measurements of stator current spectrums for squirrel-cage induction motors supplied by non-sinusoidal voltage in no-load and load operations, for good motor and motor with damages (broken bars in cage, static and dynamic eccentricity). Calculations were made for a 7.5 kW squirrel-cage induction motor. Dynamical model of this machine calculates harmonics of stator, rotor and stator-rotor inductances accounting for only global saturation of the air-gap region. The model considered variations of rotational speed of the rotor.

Słowa kluczowe

PL

silniki indukcyjne; silniki klatkowe; widmo; stojan; napięcie odkształcone

• Wydawca: Sieć Badawcza Łukasiewicz - Górnośląski Instytut Technologiczny
• Czasopismo: Maszyny Elektryczne : zeszyty problemowe
• Rocznik: 2003
• Tom: Nr 66
• Strony: 91--96
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Dybowski P.

• AGH Kraków

Bibliografia

• [1]. Rusek J.: Reflection of eccentricities in spectral composition of currents of induction machines. ICEM'96 Proceedings. Vol. 2, ETSEM - Universidade de Vigo, Spain, s. 470 - 475.
• [2]. Sobczyk T.J., Vas P., Tassoni C: A comparative study of effects due to eccentricity and external stator and rotor asymmetries by monoharmonic models. ICEM'2000 Proceedings. Vol. II. Helsinki University of Technology. Espoo, Finland, s. 946 -950.
• [3]. Dybowski P.: Pomiary i modelowanie prądowych symptomów uszkodzeń maszyn indukcyjnych. Rozprawa doktorska, AGH Kraków 2001
• [4] Lamedica R., Prudenzi A., Tironi E., Zanineliil D.: Analysis of harmonie distortion limits in IEC and IEEE Standards. 5lh International Conference Electrical Power Quality and Utilisation, Kraków 1999, s. 93- 100