Calculation of unbalanced magnetic pull in a salient-pole synchronous generator

The unbalanced magnetic forces which act upon the rotor of a salient-pole synchronous generator due to eccentric motion of the rotor shaft in the presence of magnetic field originating from the field current in no-load operation have been calculated using finite-element method. The displacement of t...

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Bibliographic Details
Main Authors: Zarko, D, Ban, D, Vazdar, I, Jaric, V
Format: Conference Proceeding
Language:English
Subjects:
AC machine
Extraterrestrial measurements
measurement
modeling
Orbits
Rotors
Shafts
simulation
Stator windings
Vibrations
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Summary:The unbalanced magnetic forces which act upon the rotor of a salient-pole synchronous generator due to eccentric motion of the rotor shaft in the presence of magnetic field originating from the field current in no-load operation have been calculated using finite-element method. The displacement of the rotor has been modeled using the actual shaft orbit recorded on a 5 MVA salient-pole generator driven by a gas turbine in a cogeneration plant. The results indicate that a variation of unbalanced forces in no-load operation at rated voltage occurs at the precession frequency of 25 Hz with maximum force of 2.32 kN.
DOI:10.1109/EPEPEMC.2010.5606602