Results 211 to 220 of about 1,887,401 (270)
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Shaft voltages caused by alternating flux encircling the shaft
Seventh International Conference on Electrical Machines and Drives, 1995If a voltmeter is connected across the two ends of the shaft of a rotating electrical machine, a small voltage can normally be detected. In many cases this voltage is too small to cause problems, but if it reaches a level at which significant current starts to flow through bearings or other components attached to the shaft, then precautions such as ...
J. Pratt
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Monitoring of shaft voltages and grounding currents in rotating machines
2014 17th International Conference on Electrical Machines and Systems (ICEMS), 2014The phenomenon of voltages and currents on motor and generator shafts has been known for the last 100 years [1, 2]. It affects motors, hydro generators and turbo generators. There has been an increase in occurrences and intensity of shaft current damages as machines became larger, particularly on high speed turbo generators.
Greg Stone, Blake Lloyd, Mladen Sasic
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A Universal Coupled Predictive Model for Motor Bearing Voltage and Multisource Shaft Voltage
IEEE Transactions on Industrial ElectronicsThis study proposes a universal motor model that accurately predicts both bearing voltages (BVs) and multisource shaft voltages (SVs). The increasingly severe problems of bearing currents (BCs) and electric-erosion faults have made the precise ...
Zongxin Xiao +4 more
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An electromagnetic model for shaft voltages in synchronous generators
2014 IEEE International Conference on Industrial Technology (ICIT), 2014W Doorsamy, W A Cronje
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European Conference on Cognitive Ergonomics, 2023
The high frequency voltage components generated by pulse width modulated voltages from a variable frequency drive cause voltage build up on the shaft of the inverter-driven machines resulting in bearing damage.
Benjamin Sirizzotti +5 more
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The high frequency voltage components generated by pulse width modulated voltages from a variable frequency drive cause voltage build up on the shaft of the inverter-driven machines resulting in bearing damage.
Benjamin Sirizzotti +5 more
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Induction Motor Shaft-Frame Voltage Analysis
2021 IEEE Energy Conversion Congress and Exposition (ECCE), 2021Most three-phase, squirrel-cage, induction motor (SCIM) fault diagnosis/detection techniques are based on the analysis of the stator currents and/or frame mechanical vibration. In this paper, a preliminary theoretical and experimental analysis of the shaft-frame voltage (SFV) in line-fed SCIMs, as a potential fault diagnosis and/or condition monitoring
Ferreira Fernando J. T. E. +2 more
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Turboalternator shaft voltage measurements
2012 IEEE International Workshop on Applied Measurements for Power Systems (AMPS) Proceedings, 2012This paper presents the results of shaft voltages measurement campaign undertaken to investigate the sources of unrecoverable temperature drift observed on the thrust bearing of a small industrial steam turbine of a turbogenerator installed in a cogeneration biomass thermal power station.
D'ANTONA, GABRIELE +3 more
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A Comprehensive Study on Shaft Voltages and Bearing Currents in Rotating Machines
IEEE transactions on industry applications, 2018This paper puts into perspective the state-of-the art knowledge on bearing currents and diagnosis tools, which rely on shaft voltages and bearing currents phenomena.
Thibaud Plazenet +3 more
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2019 15th Selected Issues of Electrical Engineering and Electronics (WZEE), 2019
The article presents the concept of elimination of shaft voltages and shaft currents in permanent magnet synchronous machines. This method is based on the use of an additional winding to compensate for the time-varying circular magnetic flux present in ...
T. Jarek, S. Berhausen
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The article presents the concept of elimination of shaft voltages and shaft currents in permanent magnet synchronous machines. This method is based on the use of an additional winding to compensate for the time-varying circular magnetic flux present in ...
T. Jarek, S. Berhausen
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