Superconducting bearing device

摘要

A superconducing bearing device comprising a permanent magnet portion (3) provided on a rotatable member (1), and a superconductor disposed as opposed to the magnet portion (2). The permanent magnet portion (3) is so mounted on the rotatable member (1) that the rotation of the rotatable member does not alter the magnetic flux distribution around the axis of rotation of the member. The superconductor (2) permits penetration of the magnetic flux of the magnet portion thereinto, is spaced apart from the magnet portion (3) by a distance permitting a predetermined quantity of magnetic flux of the magnetic portion (3) to penetrate thereinto, and is disposed at a position not permitting the rotation of the rotatable member (1) to alter the distribution of penetrating magnetic flux.