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Investigation of influence of bearing load and bearing temperature on EDM bearing currents
2010 IEEE Energy Conversion Congress and Exposition, 2010To detect the worst case and the best case of the bearing operating conditions concerning the magnitude of the high frequency discharge bearing currents (“EDM currents”) and the frequency of electric discharges in the bearings of the small power inverter-fed AC motors, systematic investigations have been performed for three, 4-pole, 1.5 kW squirrel ...
Oliver Magdun +2 more
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On inverter induced bearing currents, bearing maintenance scheduling, and prognosis
2014 International Conference on Electrical Machines (ICEM), 2014In this review we discuss the steps that are necessary to proceed from understanding the inception and evolution bearing faults, caused chiefly by bearing currents, and the advantages of the accurate estimation of the remaining useful life over fault detection.
A. Muetze, E. G. Strangas
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Diagnostic Possibilities of Induction Motor Bearing Currents
2021 XVIII International Scientific Technical Conference Alternating Current Electric Drives (ACED), 2021The paper deals with diagnostic possibilities of induction motor bearing currents. As one of the most common electrical machine mechanical faults, failures in bearings have been the diagnostic interest for a long time. With the ever-growing amount of motors running with variable speed drives, the problems regarding bearing currents and related damages ...
Karolina Kudelina +5 more
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Mineral deposition in current meter bearings
Deep Sea Research and Oceanographic Abstracts, 1975Abstract Carbonate deposits (siderite, aragonite and calcite) have been identified within current meter bearings. These deposits were observed to inhibit and even prevent the response of sensors mounted on the bearings. The mechanism of precipitation of these minerals is described, with particular reference to the increased reaction rate found when ...
Stephen C. Dexter +2 more
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Antiforce Current Bearing Waves
2012In the case of breakdown waves in a long discharge tube, near the electrode where the potential gradient in the gas is greatest, small quantity of gas is ionized. Analysis of the spectrum of radiation emitted from electric breakdown of a gas reveals no Doppler shift, indicating that the ions have negligible motion. The large difference in mobilities of
M. Hemmati +3 more
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Possibilities of Decreasing Induction Motor Bearing Currents
2021 IEEE Open Conference of Electrical, Electronic and Information Sciences (eStream), 2021This paper describes possibilities for reduction of bearing currents in induction motors. Growing usage of motors running with variable speed drives, the problems of bearing currents and related damages have become a significant issue in industry. Bearing currents cause a higher portion of faults in induction machines.
Karolina Kudelina +3 more
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Bearing currents in wind turbine generators
Journal of Renewable and Sustainable Energy, 2013Increasing the availability of multi-megawatt wind turbines (WT) is necessary if the cost of energy generated by wind is to be reduced. It has been found that WT generator bearings have a surprisingly high failure rate, with failures happening too early to be due to classical rolling contact fatigue.
M. Whittle, J. Trevelyan, P. J. Tavner
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The Conduction of Current in Bearings
A S L E Transactions, 1959Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angles, Calif., October, 1958.
H. N. Kaufman, J. Boyd
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Statistical approach to discharge bearing currents
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2010PurposeThe purpose of this paper is to propose a statistical approach, which enables the prediction of the risk of the appearance of discharge bearing currents in a given drive that can damage the motor bearings. Using such an approach, the drives for the decisive but expensive, long‐term destructive investigations can be selected.
Robert Smolenski +2 more
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Bearing Fault Detection via Autoregressive Stator Current Modeling
IEEE Transactions on Industry Applications, 2004This research proposes a method for detecting developing bearing faults via stator current. Current-based condition monitoring offers significant economic savings and implementation advantages over vibration-based techniques. This method begins by filtering the stator current to remove most of the significant frequency content unrelated to bearing ...
J.R. Stack, T.G. Habetler, R.G. Harley
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