高温超電導磁気浮上系の電磁力およびトルクと浮上体の回転運動

抄録

This research deals with evaluation of electromagnetic force and torque acting on a permanent magnet(PM)above a high-T_c superconductor(HTSC)and discusses dynamics of a spinning PM freely levitated above a HTSC. Force and torque were evaluated experimentally as functions of both displacement and tilting angle of the PM. Experimental results show that the force and torque acting on the PM are almost equivalent to ones acting on a rotor supported by an overhung shaft with a frictionless bearing. By theoretical analysis based on the above evaluation of the force and torque, dynamical behavior of a spinning PM was examined. Predicted whirling and precession on the PM were observed in experiments of rotation.