Title :
Effects of rotor eccentricity and parallel windings on induction machine behavior: a study using finite element analysis
Author :
DeBortoli, M.J. ; Salon, S.J. ; Burow, D.W. ; Slavik, C.J.
Author_Institution :
Magsoft Corp., Troy, NY, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Rotor eccentricity and the effect of parallel windings in an induction motor are investigated by means of a transient finite element model. Magnetic flux density and force distribution harmonics generated by the model are presented for the cases of static and dynamic rotor eccentricity, with various combinations of series and parallel stator winding connections. These results are compared with those obtained from a centered rotor case. Examples of the action of parallel-connected windings to reduce the effects of rotor eccentricity are given. The effect of circulating current between various combinations of parallel windings in an eccentric rotor induction machine is shown to reduce the unbalanced magnetic pull and to significantly reduce or eliminate other vibration-producing magnetic force harmonics generated by the eccentricity
Keywords :
asynchronous machines; fast Fourier transforms; finite element analysis; machine theory; machine windings; magnetic flux; rotors; 2D FFT analysis; circulating current; finite element analysis; force distribution harmonics; induction machine; magnetic flux density; parallel windings; rotor eccentricity; series stator winding connections; transient finite element model; unbalanced magnetic pull; vibration-producing magnetic force harmonics; Finite element methods; Induction generators; Induction machines; Induction motors; Machine windings; Magnetic flux; Magnetic flux density; Magnetic forces; Rotors; Stator windings;
Journal_Title :
Magnetics, IEEE Transactions on
