Title :
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
fDate :
9/1/2000 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
