Disturbance attenuation and faster stabilization via permanent magnet placement on repulsive type magnetic bearing

Author

Mukhopadhyay, S.C. ; Ohji, T. ; Iwahara, M. ; Yamada, S. ; Matsumura, F.

Author_Institution

Fac. of Eng., Kanazawa Univ., Japan

Volume

1

fYear

1997

fDate

26-29 May 1997

Firstpage

255

Abstract

Repulsive type magnetic bearings consisting of permanent magnets (PM) and controlled current electromagnets have the advantages of less number of electromagnets and simplified control circuit compared to active magnetic bearing. The system is a fundamentally unstable one and is very prone to disturbance. The shape and configuration of the permanent magnet has a strong influence on the stability of the system. Two models of repulsive type magnetic bearing have been designed and fabricated in our laboratory. Repulsive forces and stiffness characteristics for different PM configurations have been studied and suitable configuration have been chosen. This paper investigates a method of disturbance attenuation and faster stabilization via permanent magnet configuration on repulsive type magnetic bearing

Keywords

electric current control; electromagnets; machine bearings; magnetic devices; permanent magnets; stability; active magnetic bearing; controlled current electromagnets; disturbance attenuation; permanent magnet placement; repulsive type magnetic bearing; stability; stabilization; stiffness characteristics; Attenuation; Control systems; Costs; Electromagnets; Laboratories; Magnetic levitation; Permanent magnets; Rotors; Shafts; Stators;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 1997. Proceedings., 1997 International Conference on

Print_ISBN

0-7803-3773-5

Type

conf

DOI

10.1109/PEDS.1997.618710

Filename

618710