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

Volume

9

Issue

2

fYear

1994

fDate

6/1/1994 12:00:00 AM

Firstpage

304

Lastpage

310

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;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.300144

Filename

300144