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Application guide bearing currents [PDF]
, 2021 This application guide bearing currents is intended to provide an overview of electrical bearing current effects in rolling bearings, related to bearing damage, concerning the questions: - Which typical failures occur due to bearing currents? - What are electrical bearing currents? - How do electrical bearing currents occur?
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Induction Motor Bearing Currents - Causes and Damages
2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED), 2021Bearing damages make the biggest proportion of faults affecting AC electrical motors. There are various subdivisions of the bearing faults but one of them is the induced bearing and shaft currents in the machines. These currents cannot be fully avoided, yet with the development of power electronic control of the machines, the number of machines ...
Kudelina, Karolina +6 more
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Bearing wear caused by converter-induced bearing currents
IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society, 2010The basic interrelationships that are required to investigate the cross-system subject of “bearing currents in converter operation”, are discussed in this paper. In order to obtain an integrated overview of the situation, it is decisive that the main points of the investigation are not discussed individually, but must be considered from an overall ...
H. Tischmacher +3 more
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Bearing currents in converter operation
The XIX International Conference on Electrical Machines - ICEM 2010, 2010The basic inter-relationships, which are required to investigate the cross-system subject of “bearing currents in converter operation”, are discussed in this paper. In order to obtain an integrated overview of the situation, it is decisive that the main points of investigation that are discussed are combined and viewed holistically.
H. Tischmacher, S. Gattermann
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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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