Finite-element Calculation of Unbalanced Magnetic Pull and Circulating Current between Parallel Windings in Induction Motor with Non-uniform Eccentric Rotor
نویسنده
چکیده
In induction machines, an eccentrically positioned rotor experienced a strong unbalanced pull toward the short side of the air gap. The non-symmetric flux distribution due to the eccentricity induces circulating currents in the rotor cage and parallel branches of the stator winding. These currents equalise the flux distribution and reduce the unbalanced magnetic pull. In this paper, the effects of the rotor eccentricity and equalising currents on the unbalanced magnetic pull are studied by multi-slice, time-stepping, finite element model. The modelling is done for the cases in which the rotor is parallel or diagonal with respect to the stator. The results of series and parallel connected motors are then compared.
منابع مشابه
Modelling the Unbalanced Magnetic Pull in Eccentric-rotor Electrical Machines with Parallel Windings
OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P.O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Andrej Burakov Name of the dissertation Modelling the unbalanced magnetic pull in eccentric-rotor electrical machines with parallel windings Manuscript submitted 08.06.2007 Manuscript revised 07.10.2007 Date of the defence 25.10.2007 Monograph Article dissertation (summary + original ...
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