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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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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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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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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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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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Influence of bearing currents on the bearing lifetime for converter driven machines
2012 XXth International Conference on Electrical Machines, 2012The possibility to calculate motor bearing currents from motor geometry and the mechanisms that lead to these currents are known today [1], [2]. The precise mechanical and electrical procedures which lead to the well known corrugated patterns, a “mountain/valley” structure in the bearing raceway, which reduces the bearing lifetime, are still unknown ...
M. Kriese +5 more
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An overview of shaft voltages and bearing currents in rotating machines
2016 IEEE Industry Applications Society Annual Meeting, 2016Shaft voltages and associated "shaft currents" or "bearing currents" have been known since more than a century on DC and AC motors under classical line operation. More recently with the emergence of inverter drives, there has been an increase of high-frequencies bearing currents and shaft voltages creating mainly premature failure of bearings. Although
Thibaud Plazenet +3 more
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Characteristics of Shaft Voltage and Bearing Currents
IEEE Industry Applications Magazine, 1997This article reviews investigations into reduced bearing life due to voltage source adjustable speed drive (ASD) AC motor operation. Relevant bearing failure mechanisms and indicators are discussed. dv/dt and electric discharge machining (EDM) contributions are discussed and experimental data presented showing the voltage levels on motor shafts when ...
Dave Busse +4 more
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Detection of balls bearing Incipient defect by current analysis
IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society, 2021The bearing problem is considered as the first factor responsible of defects in the electric machines. Traditionally, rolling monitoring is based on the analysis of vibration signals requiring sensors around the machine. The objective of our research work is based on the analysis of electromagnetic signals (current, voltage, stray flux) to detect ...
Mahamad Hassan Gaditto +5 more
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