Title :
Three dimensional vibration of the HTSC-permanent magnet bearing system in the mechanical resonant state
Author :
Ohashi, Shunsuke ; Tanaka, Hidenori ; Hirane, Yoshihisa
Author_Institution :
Dept. of Electr. Eng., Kansai Univ., Osaka, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
The three dimensional vibration of the rotor in a HTSC-permanent magnet bearing system is studied. We have developed the bearing system which can revolve up to 12000 rpm, and the three dimensional vibration of the rotor is measured with laser displacement sensors. The shape of the rotor has been improved, and influence of the air resistance becomes small. The vibration of the rotor around the mechanical resonance frequency is investigated. Both columnar and conical behavior of the rotor are confirmed and mainly columnar motion is observed
Keywords :
barium compounds; displacement measurement; high-temperature superconductors; magnetic bearings; magnetic levitation; measurement by laser beam; permanent magnets; resonance; rotors; vibrations; yttrium compounds; HTSC-permanent magnet bearing system; Y1.8Ba2.4Cu3.4O; Y1.8Ba2.4Cu3.4Ox; air resistance; columnar behaviour; columnar motion; conical behavior; laser displacement sensors; magnetic levitation; mechanical resonance frequency; mechanical resonant state; rotor; three dimensional vibration; Displacement measurement; Electrical resistance measurement; Magnetic levitation; Magnetic sensors; Mechanical sensors; Resonance; Resonant frequency; Sensor systems; Shape; Vibration measurement;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
