Title :
Calculation of UMP in induction motors with series or parallel winding connections
Author :
Dorrel, D.G. ; Smith, A.C.
Author_Institution :
Dept. of Eng., Cambridge Univ., UK
fDate :
6/1/1994 12:00:00 AM
Abstract :
This paper presents a general analytical method for determining the unbalanced magnetic pull (UMP) produced in three-phase induction motors with an eccentric rotor. The model uses the conformal transformation technique coupled to a winding impedance approach that is capable of accommodating any stator winding connection. The paper examines the influence of using parallel stator winding paths as a means of reducing the resultant UMP (static and pulsating). The results clearly demonstrate the significant reduction of static UMP of a typical stator winding with parallel paths together with the unbalanced winding currents that are produced
Keywords :
electric drives; induction motors; machine theory; magnetic fields; rotors; stators; conformal transformation technique; eccentric rotor; parallel winding connections; pulsating unbalanced magnetic pull; series winding connections; static pulsating magnetic pull; stator winding connection; three-phase induction motors; unbalanced magnetic pull; unbalanced winding currents; winding impedance approach; Air gaps; Couplings; Impedance; Induction motors; Magnetic analysis; Manufacturing; Rotors; Shafts; Stator windings; Wounds;
Journal_Title :
Energy Conversion, IEEE Transactions on
