Determination of forces and linearized parameters of radial active magnetic bearings by finite element technique

Author

Autila, M. ; Lantto, Erkki ; Arkkio, Antero

Author_Institution

Dept. of Electromech., Helsinki Univ. of Technol., Espoo, Finland

Volume

34

Issue

3

fYear

1998

fDate

5/1/1998 12:00:00 AM

Firstpage

684

Lastpage

694

Abstract

Load capacity is a primary performance criterion of an active magnetic bearing (AMB) system. The load capacity depends on the size and geometry of the bearings as well as on the performance of the control system. In this paper, we use a nonlinear two-dimensional (2-D) finite element method (FEM) to predict the performance of radial magnetic bearings. The force calculations based on the finite element method are verified by measurements with two machines equipped with active magnetic bearings. The parameters of a linearized model of radial bearings are also calculated at different operation points. With this information, the load capacity can be estimated

Keywords

finite element analysis; machine bearings; magnetic devices; control system; forces; linearized parameters; load capacity; nonlinear two-dimensional finite element method; radial active magnetic bearing; Compressors; Condition monitoring; Control systems; Electromagnets; Finite element methods; Force measurement; Magnetic levitation; Rotors; Sliding mode control; Vibration measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.668066

Filename

668066