Effects of saturation on the forces in induction motors with whirling cage rotor

Author

Tenhunen, Asmo ; Holopainen, Timo P. ; Arkkio, Antero

Author_Institution

Lab. of Electromech., Helsinki Univ. of Technol., Finland

Volume

40

Issue

2

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

766

Lastpage

769

Abstract

The effects of magnetic saturation on the radial magnetic forces in induction machines when the rotor is performing a cylindrical circular whirling motion are studied in this paper. Impulse method in the finite element analysis is used to calculate the forces and eccentricity harmonics from both the air-gap flux density and rotor currents. The forces are studied as a function of supply voltage in order to find the effects of saturation on them. The maximum radial force is found to be limited by saturation, which also couples the eccentricity harmonics together.

Keywords

finite element analysis; induction motors; machine theory; magnetic forces; rotors; air-gap flux density; cylindrical circular whirling motion; eccentricity harmonics; electromagnetic forces; finite element analysis; force saturation; impulse method; induction machines; induction motors; magnetic saturation; radial force; radial magnetic forces; rotor currents; supply voltage; whirling cage rotor; Air gaps; Finite element methods; Harmonic analysis; Induction machines; Induction motors; Magnetic analysis; Magnetic flux; Magnetic forces; Rotors; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.824549

Filename

1284527