US 4,808,954 AGranted

Superconducting coil apparatus

AssigneeKabushiki Kaisha Toshiba

InventorDaisuke Ito

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Abstract

A superconducting coil apparatus comprises a first coil unit and second coil unit disposed concentrically outside the first coil unit. The second coil unit includes a cylindrical former having a spiral groove formed on an outer surface thereof, and a coil element constituted by a superconducting wire fitted in the spiral groove to form a spiral shape. The former is composed of a plurality of former segments which are assembled into a cylindrical foam. Each segment has a plurality of recess portions formed on the outer surfaces thereof and defining the spiral groove when the segments are assembled into the former. Each segment has a fluid passage formed on the outer surfaces thereof to permit the cooling medium to flow therethrough to come in contact with the superconducting wire. Thus, the coil apparatus is easy to assemble and relatively compact. Further, the spiral groove has V-shaped cross section, so that the superconducting wire will not be shifted in the axial direction of the coil element.

Claims16

Dependent claims

A superconducting coil apparatus, having superconducting wires and soaked in a cooling medium so that said superconducting wires in touch with the cooling medium is cooled, said apparatus comprising:

a first coil unit including a cylindrical first former having a first groove formed in spiral on an outer surface thereof, and a first coil element constituted by part of a superconducting wire fitted in said first groove to form a spiral shape, said first former having a first fluid passage formed on the outer surface thereof to permit the cooling medium to flow therethrough to come in contact with said superconducting wire;
and
a second coil unit including a cylindrical second former having a second groove formed in spiral on an outer surface thereof and disposed concentrically outside said first former, and a second coil element constituted by another part of a superconducting wire fitted in said second groove to form a spiral shape, said second former composed of a plurality of former segments which are assembled into a cylindrical foam, each segment having a plurality of recess portions formed on the outer surfaces thereof and defining said second groove when said segments are assembled into said second former, and a second fluid passage formed on the outer surfaces of said segments to permit the cooling medium to flow therethrough to come in contact with said superconducting wire.

Dependencies are inferred from the claim text.