Three dimensional vibration of the HTSC-permanent magnet bearingsystem in the mechanical resonant state

摘要

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