Comparison of induction machine stator vibration spectra induced by reluctance forces and magnetostriction

Author

Delaere, Koen ; Heylen, Ward ; Belmans, Ronnie ; Hameyer, Kay

Author_Institution

ESAT, Katholieke Univ., Leuven, Heverlee, Belgium

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

969

Lastpage

972

Abstract

For rotating electric machines, the reluctance forces (Maxwell stresses) acting on the stator teeth are a major cause of noise emission. Next to the reluctance forces, magnetostriction is a potential cause of additional noise from electric machines. First, a thermal stress analogy is used to introduce magnetostriction in the finite-element framework. Next, we present the computation and comparison of the stator vibration spectra caused by these two effects separately, by example of a 45 kW induction machine. Moreover, two kinds of magnetostriction characteristics of the stator yoke material are compared: a quadratic λ(B) curve and a λ(B) curve with zero-crossing around 1.5 Tesla

Keywords

acoustic noise; asynchronous machines; finite element analysis; machine theory; magnetic forces; magnetostriction; stators; vibrations; 1.5 T; 45 kW; Maxwell stresses; coupled magnetomechanical problems; finite-element methods; induction machine stator vibration spectra; magnetostriction; noise emission; quadratic λ(B) curve; reluctance forces; rotating electric machines; stator teeth; stator yoke material; thermal stress analogy; Electric machines; Finite element methods; Induction machines; Magnetic field induced strain; Magnetic materials; Magnetic separation; Magnetostriction; Stators; Thermal stresses; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996249

Filename

996249