Analysis of hybrid magnetic bearing with a permanent magnet in the rotor by FEM

Author

Yanliang, Xu ; Yueqin, Dun ; Xiuhe, Wang ; Yu, Kong

Author_Institution

Shandong Univ.

Volume

42

Issue

4

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

1363

Lastpage

1366

Abstract

The structure and operating principle of a new kind of hybrid magnetic bearing (HMB) with permanent magnets in the rotor are introduced in this paper. Three-dimensional FEM analysis models of HMB are built first, then air-gap flux density distribution under different conditions, X-Y magnetic coupling, and the force-current characteristics are studied in sequence, some of which are compared with other kinds of magnetic bearings to throw light on the advantages of the presented HMB. A prototyped HMB is manufactured in the application of the satellite attitude control/energy storage flywheel system with angular moments of 15Nms at a speed of 30 000rpm. It is verified by theoretical analysis and prototyped experiments that the proposed HMB features simple structure, low power loss, little X-Y magnetic coupling, good force-current characteristics, and, finally, high operating reliability

Keywords

electromagnetic coupling; finite element analysis; magnetic bearings; permanent magnets; rotors; energy storage flywheel system; finite element analysis; flux density distribution; force-current characteristics; hybrid magnetic bearing; magnetic coupling; permanent magnet excitation; satellite attitude control; Air gaps; Energy storage; Magnetic analysis; Magnetic flux; Magnetic levitation; Manufacturing; Optical coupling; Permanent magnets; Prototypes; Satellites; Flywheel system; hybrid magnetic bearing; permanent magnet excitation; three-dimensional (3-D) FEM analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.871396

Filename

1608468