Application of a computationally efficient air-gap element within the finite element analysis of magnetic bearings

Author

Schmidt, Erich ; De Gersem, Herbert ; Weiland, Thomas

Author_Institution

Inst. fur Elektrische Antriebe und Maschinen, Technische Univ. Wien, Vienna

Volume

42

Issue

4

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

1263

Lastpage

1266

Abstract

This paper presents finite-element analyses of radial magnetic bearings where noncentered rotor positions are considered very efficiently. With an introduction of a reformulated air-gap macro element, distinct stator and rotor models can be used, and remeshing of the air gap is avoided. Therefore, static and dynamic rotor eccentricities can be considered very easily. The force-current relations for a typical design of a radial magnetic bearing with four pole pairs in two orthogonal directions are evaluated with both conventional finite-element models and models based on the eccentric air-gap element

Keywords

air gaps; finite element analysis; magnetic bearings; rotors; stators; air-gap element; finite element analysis; radial magnetic bearings; rotor models; stator models; Air gaps; Coils; Computer applications; Finite element methods; Magnetic analysis; Magnetic flux; Magnetic levitation; Reduced order systems; Saturation magnetization; Stators; Air-gap element; finite element method; magnetic bearing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.870965

Filename

1608443