PURPOSE: To block transmission of stress to an inner cylindrical tube and to realize miniaturization of motor by securing a superconducting magnet, disposed between respective ribs of the inner cylindrical tube, to an outer cylindrical tube secured to the end of the ribs.
CONSTITUTION: Four superconducting magnets 32 constituting a superconducting coil are disposed between respective ribs of an inner cylindrical tube 30. An outer cylindrical tube 31 is secured through bolts 76 to the end of the rib 75. The superconducting magnet 32 is secured through screws 77 to the outer cylindrical tube 31. Since force applied on the superconducting coil is transmitted to the outer cylindrical tube, the ribbed outer cylindrical tube is not subjected to strong force and the stress occurring in the ribbed inner cylindrical tube can be released through the ribs to the outer cylindrical tube. According to the constitution, the ribbed inner cylindrical tube can be made thin resulting in miniaturization of superconducting motor.
ARIGA HIDEKI
SHIIMADO TOSHIHIRO
ITO YOSHIHISA
HORI KOJI
