Development of active magnetic bearings for high speed rotors

Author

Boehm, J. ; Gerber, R. ; Hartley, J.R. ; Whitley, S.

Author_Institution

Dept. of Pure & Appl. Phys., Salford Univ., UK

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2544

Lastpage

2546

Abstract

A magnetically fully levitated rotor system has been designed and built. It consists of stator and rotor bearings for the rotating shaft, an electronic control system, an optical sensing system, and power amplifiers. For an application in which the rotor spins at high speeds in a vacuum, its position is controlled by infrared light sensors. The system has been shown to spin at frequencies of up to 140 Hz, and an extension of the rotational frequency to 1000 Hz is envisaged. The rotor vibrations have been shown to occur at theoretically predicted frequencies. The amplitudes of radial vibrations were kept below ±22 μm and mainly occurred at around ±10 μm

Keywords

machine bearings; magnetic devices; magnetic levitation; rotors; stators; 1000 Hz; 140 Hz; active magnetic bearings; electronic control system; high speed rotors; infrared light sensors; magnetically fully levitated rotor system; optical sensing system; power amplifiers; radial vibrations; rotating shaft; rotor vibrations; stator; vacuum; Control systems; Frequency; Infrared sensors; Magnetic levitation; Optical amplifiers; Optical control; Optical sensors; Semiconductor optical amplifiers; Shafts; Stators;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104792

Filename

104792