Finite element modeling of the magnetizing inductance of an induction motor as a function of torque

Author

Nerg, J. ; Pyrhönen, J. ; Partanen, J.

Author_Institution

Dept. of Electr. Eng., Lappeenranta Univ. of Technol., Finland

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2047

Lastpage

2049

Abstract

The torque dependency of the magnetizing inductance of an induction motor is studied. A calculation procedure based on accurate finite element (FE) modeling solution of the air-gap flux linkage to obtain the magnetizing inductance of an induction motor at different load conditions is introduced. Two-dimensional nonlinear time stepping FE analysis is used to calculate the instantaneous rotor and stator currents as well as the flux density distribution in the air-gap. The amplitude of the magnetizing current vector is calculated using the sum magnetomotive forces of the rotor and the stator. The magnetizing inductance is calculated from the air-gap flux linkage and the magnetizing current vector. It is shown that the magnetizing inductance of an induction motor decreases as a function of torque.

Keywords

air gaps; finite element analysis; inductance; induction motors; magnetic flux; rotors; stators; torque; air-gap flux linkage; finite element method; flux density distribution; induction motor; magnetizing current vector; magnetizing inductance; magnetomotive forces; rotor currents; stator currents; torque function; Air gaps; Couplings; Finite element methods; Inductance; Induction motors; Magnetic analysis; Magnetic flux; Rotors; Stators; Torque; FEM; Finite element method; induction motor; magnetizing inductance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.830232

Filename

1325401