Warianty tytułu
Konferencja
APTADM 2007, III International Conference on Advances in Processing Testing and Application of Dielectric Materials., September, 26-28, 2007 Wrocław, Poland
Języki publikacji
Abstrakty
Failures of bearings in electric motors related to electrical damages started to increase after the introduction of the fast switching pulse width modulated IGBT inverter on the market in the mid 1990s. The aim of this work was to investigate how the damages occur. Shaft voltage, mechanical load, speed, lubricant and discharge energy were some of the parameters considered. The threshold voltage level was found to be mostly dependent on the oil film thickness which in return depends on speed and load. Shaft voltage proved to be the dominant factor in creating damages on the bearing surface. The film is capable of holding a higher voltage before breakdown under high frequency voltages as compared to slowly increasing voltages. Speed and load did not seem to affect the discharge energy but affect the pattern of the damages. Damages were also observed on the bearing lubricated with low impedance grease to the same extent as with conventional grease.
Słowa kluczowe
Rocznik
Tom
Strony
141-146
Opis fizyczny
Bibliogr. 16 poz.
Twórcy
autor
autor
autor
autor
autor
- High Voltage Engineering Department of Materials and Manufacturing Technology
Bibliografia
- [1] Muetze A., Bearing Currents in Inverter-Fed AC-Motors. Doctorial dissertation, Elektrotechnik und lntbrmationstechnik dcr Tcchnischen Universitaet Darmstadt, Darmstadt 2003.
- [2] Bell S. et al., Experience with variable frequency drives and motor bearing reliability. IEEE Ind. Appl. Soc. 45"' Ann. Petrol, and Chem. Ind. Conf., 1998, pp. 253-262.
- [3] Lin C.-M, Chiou Y.-C, Lee R.-T., Pitting mechanism on lubricated surface of babbitt alloy/bearing steel pair under ac electric field, Wear 249, 2001, pp. 133-142.
- [4] Erdman J.M., Kerkman R.J., Schlegel D.W.,Skibiński G.L., Effect ofPWM Inverters on AC Motor Bearing Currents and Shaft Voltages, IEEE Trans, on Ind. Appl., Vol. 32. No. 2, 1996. pp. 250-259.
- [5] Andreason S.. Passage of Electrical Current Through Rolling Bearings, SKF Gothenburg.
- [6] Busse D„ Erdman J.M, Kerkman R.J.,Schlegel D.W., Skibiński G.L., Characteristics of Shaft Voltage and Bearing Currents, IEEE Ind. Appl. Mag., Vol. 3, No. 6. 1997. pp. 21-32.
- [7] Gambia/Rema Working group, Motor Shaft Voltages and Bearing Curents under PWM Inverter Operation. Technical report No. 2, Is' cd.
- [8] Prashad H., Investigations of corrugated pattern on the surfaces of roller bearings operated under the influence of electrical fields, Lubrication Eng. 44 (8), 1988,710-718.
- [9] Busse D., Erdman J.M. Kerkman R.J., Schlegel D.W., Skibiński G.L., System electrical parameters and their effects on bearing currents, IEEE Trans. Ind. Appl. 33 (2), 1997. pp. 577-584.
- [10] Harris T., Rolling bearing analysis. Wiley, New York 1984.
- [11] Busse D„ Erdman J.M, Kerkman R.J., Schlegel D.W., Skibiński G.L., Bearing Currents and Their Relationship to PWM Drives. IEEE Trans, on Pow. El., Vol. 12. No. 2, 1997. pp. 243-252.
- [12] Hyypio D., Mitigation of Bearing Electro-Erosion of Inverter-Fed Motors Through Passive Common-Mode Voltage Suppression, IEEE Trans, on Ind. Appl., Vol. 41, No. 2, March/April 2005.
- [13] Marinov P., Rahman M.M., Measuring bearing currents, M. Sc. Thesis, Gothenburg 2005.
- [14] Mathiasson B., Johansson T, Discharge Generator (Current damages in bearings), M. Sc. Thesis. Gothenburg 2006.
- [15] Castrol, Product data SafeCoat 66.
- [16] Kluber Lubrication, Product information Kliibeiiectric BE44-152, article number: 091053, Edition 01.06
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BPW9-0004-0059