PURPOSE: To remarkably improve rigidity of bearing force by arranging in series one or more magnetic bearing with a structure which surrounds a permanent magnet of donut type disc having N and S poles in the axial direction, into which center a non-magnetic rotary shaft is inserted, by means of high temperature superconductor so that the magnet may turn freely.
CONSTITUTION: A superconductive magnetic bearing A is composed of a non- magnetic rotary shaft 1, donut-like permanent magnet 2 having the shaft inserted therein and a high temperature superconductive member 3 surrounding the shaft 1. This conductive member 3 is composed of split mating superconductive members 6, 7 with recesses 5 housing half parts of the magnet 2 and bearing holes 4 into which the shaft 1 is inserted. With this constitution, and by the use of reaction between the superconductive member and the magnet due to Meissner effect as well as pining force, rigidity is increased.
TANABE KEIICHI
IWATA TSUNEKAZU
