PURPOSE: To alleviate the load of a movable element during moving and to eliminate a limit for the positional relationship between the element and a stator by oppositely providing a second superconductor which is made of the same material as that of a first superconductor and can be clamped by a magnetic flux pin to the first superconductor at a core.
CONSTITUTION: A stator 12 is disposed under a rotor 11. The stator 12 has 24 pieces of cores 18 fixed annularly in a pectinated state on a disc 17 and an exciting coil 19 wound on the cores 18. The cores 18 are made of soft magnetic material, and a columnar superconductor 23 which is made of the same material as that of a superconductor 16 and can be clamped by a magnetic flux pin at centers is so embedded as to pass through the cores 18. The upper surface of the embedded superconductor 23 is opposed to the lower surface of the superconductor 16. The cores 18 are fixed to the disc 17 oppositely to the superconductor 16. Specifically, the outer periphery of the superconductor 16 is disposed on that of the core 18, and the inner periphery of the superconductor 16 is disposed as to be opposed to that of the core 18.
SAKURAI TAKESHI
KOMADA KIICHI
