Hybrid bearing for induction machine with controlled electromagnetic positioning and superconducting levitation

Author

Santisteban, José Andrés ; David, Domingos F B ; Stephan, Richard M. ; Ripper, Arthur ; De Andrade, Rubens, Jr. ; Pereira, Agnaldo S. ; Nicolsky, Roberto

Author_Institution

Univ. Federal Fluminense, Niteroi, Brazil

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3693

Lastpage

3695

Abstract

A frictionless electromagnetic-superconducting hybrid bearing for induction machine has been designed and is currently in development and tests. The vertical and radial stiffnesses have been investigated by dynamic method for different air gaps of the axial superconducting bearing. The measured low value of the radial elastic constant appeared to be responsible for the instability of the rotating shaft. That instability has been controlled using double motor-bearing devices assembled on the same shaft. This fully frictionless system reached a spinning speed of 6300 RPM

Keywords

electric motors; finite element analysis; machine testing; machine theory; machine windings; magnetic bearings; magnetic levitation; superconducting machines; superconducting magnets; controlled electromagnetic positioning; frictionless electromagnetic-superconducting hybrid bearing; induction machine; radial stiffness; rotating shaft instability; superconducting levitation; vertical stiffness; Electromagnetic induction; High temperature superconductors; Induction machines; Magnetic levitation; Mechanical bearings; Prototypes; Rotors; Shafts; Superconducting magnets; Superconducting transition temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908943

Filename

908943