Superconducting coil
A superconducting coil comprises a superconducting wire, an insulating sheet, and an adhesive resin. The insulating sheet includes a plurality of resin sheets and two semi-cured resin fiber sheets. The plurality of resin sheets have electrical insulation and are disposed in at least two layers. The two semi-cured resin fiber sheets are disposed in layers with the plurality of resin sheets disposed therebetween. The plurality of resin sheets and the two semi-cured resin fiber sheets have mutually adjacent resin and semi-cured resin fiber sheets bonded together.
1 . A superconducting coil comprising:
a superconducting wire wound by a plurality of turns and in a plurality of layers;
an insulating sheet disposed across the plurality of turns of the superconducting wire between the layers of the superconducting wire; and
an adhesive resin introduced to be cured between the superconducting wire and the insulating sheet, wherein
the insulating sheet includes a plurality of resin sheets having electrical insulation and disposed in at least two layers, and two semi-cured resin fiber sheets disposed in layers with the plurality of resin sheets disposed therebetween,
the two semi-cured resin fiber sheets are fully cured along with curing of the adhesive resin, and the adhesive resin and the two semi-cured resin fiber sheets are adhered to each other, and
the plurality of resin sheets and the two semi-cured resin fiber sheets having mutually adjacent resin and semi-cured resin fiber sheets are bonded together.
2 . The superconducting coil according to claim 1 , wherein the plurality of resin sheets include a plastic sheet.
3 . The superconducting coil according to claim 2 , wherein the plurality of resin sheets include a plurality of the plastic sheets disposed in layers and thus adjacent to one another, and the plurality of plastic sheets, at a portion thereof having plastic sheets in contact with one another as the plastic sheets are disposed in layers, have fluorocarbon resin applied thereto.
4 . The superconducting coil according to claim 2 , wherein among the plurality of resin sheets disposed in at least two layers, two adjacent resin sheets are bonded together only at an end portion thereof in a direction along a winding axis of the superconducting coil.
5 . The superconducting coil according to claim 2 , wherein the plurality of resin sheets further include a releasable sheet, and the releasable sheet is adjacent to a corresponding one of the two semi-cured resin fiber sheets.
6 . The superconducting coil according to claim 5 , wherein the resin sheet and the semi-cured resin fiber sheet disposed in layers with the releasable sheet disposed therebetween are bonded together only at an end portion of the resin and semi-cured resin fiber sheets in a direction along a winding axis of the superconducting coil.
7 . The superconducting coil according to claim 6 , wherein, in the direction along the winding axis of the superconducting coil, the releasable sheet is smaller in width than each of the resin sheet and the semi-cured resin fiber sheet bonded together only at the end portion of the resin and semi-cured resin fiber sheets.
8 . The superconducting coil according to claim 1 , wherein the plurality of resin sheets include a cured resin fiber sheet.
9 . The superconducting coil according to claim 8 , wherein among the plurality of resin sheets disposed in at least two layers, two adjacent resin sheets are bonded together only at an end portion thereof in a direction along a winding axis of the superconducting coil.
10 . The superconducting coil according to claim 8 , wherein the plurality of resin sheets further include a releasable sheet, and the releasable sheet is adjacent to a corresponding one of the two semi-cured resin fiber sheets.
11 . The superconducting coil according to claim 10 , wherein the resin sheet and the semi-cured resin fiber sheet disposed in layers with the releasable sheet disposed therebetween are bonded together only at an end portion of the resin and semi-cured resin fiber sheets in a direction along a winding axis of the superconducting coil.
12 . The superconducting coil according to claim 11 , wherein, in the direction along the winding axis of the superconducting coil, the releasable sheet is smaller in width than each of the resin sheet and the semi-cured resin fiber sheet bonded together only at the end portion of the resin and semi-cured resin fiber sheets.
13 . The superconducting coil according to claim 1 , wherein the plurality of resin sheets further include a releasable sheet, and the releasable sheet is adjacent to a corresponding one of the two semi-cured resin fiber sheets.
14 . The superconducting coil according to claim 13 , wherein the resin sheet and the semi-cured resin fiber sheet disposed in layers with the releasable sheet disposed therebetween are bonded together only at an end portion of the resin and semi-cured resin fiber sheets in a direction along a winding axis of the superconducting coil.
15 . The superconducting coil according to claim 14 , wherein, in the direction along the winding axis of the superconducting coil, the releasable sheet is smaller in width than each of the resin sheet and the semi-cured resin fiber sheet bonded together only at the end portion of the resin and semi-cured resin fiber sheets.
16 . The superconducting coil according to claim 1 , wherein among the plurality of resin sheets disposed in at least two layers, two adjacent resin sheets are bonded together only at an end portion thereof in a direction along a winding axis of the superconducting coil.