Results 201 to 210 of about 10,109 (244)

Induction Motor Shaft-Frame Voltage Analysis

2021 IEEE Energy Conversion Congress and Exposition (ECCE), 2021
Most 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
openaire   +1 more source

Turboalternator shaft voltage measurements

2012 IEEE International Workshop on Applied Measurements for Power Systems (AMPS) Proceedings, 2012
This 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
openaire   +2 more sources

Frame-to-Shaft Voltage and End-to-End Shaft Voltage Analysis According to Eccentricity in IPMSMs

2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018
Common-mode voltage (CMV) by switching pattern of space vector pulse width modulation (SVPWM) excites the parasitic capacitance links in the motor and results in frame-to-shaft voltage. In addition, asymmetric magnetic fields by common-mode current (CMI), eccentricity, and demagnetization causes the end-to-end shaft voltage.
Jun-Kyu Park   +3 more
openaire   +1 more source

Determination of shaft position from shaft voltage on a synchronous generator

2005 5th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, 2005
Shaft voltages and currents are an unavoidable characteristic of rotating machines. Recently there has been renewed interest in the diagnostic possibilities of these signals. This paper presents a technique to determine the mechanical shaft position using a capture of the shaft voltage and a mechanically aligned pre-recorded reference.
Simon J. Hoffe   +2 more
openaire   +1 more source

Characteristics of Shaft Voltage and Bearing Currents

IEEE Industry Applications Magazine, 1997
This 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
openaire   +1 more source

Study on effect of neutral voltages on shaft voltages causing bearing currents

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
This paper investigates that effect of neutral voltage on shaft voltages. The shaft voltages are expected to provide cause of bearing currents. The bearing currents damage bearing in motor. We expect neutral voltages to cause shaft voltages. Thus, we construct circuit of interior motor.
Takuya Katayama   +5 more
openaire   +1 more source

Shaft voltages caused by alternating flux encircling the shaft

Seventh International Conference on Electrical Machines and Drives, 1995
If 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 ...
openaire   +1 more source

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