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superconducting coil

A technology of superconducting coils and superconducting wires, which is applied in the directions of superconducting magnets/coils, superconducting devices, superconducting/high-conducting conductors, etc. The effect of preventing peeling

Active Publication Date: 2017-11-14
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a superconducting coil impregnated with epoxy resin, delamination occurs between the wire layers during cooling, resulting in a decrease in the critical current.
In addition, it is also considered to use paraffin instead of epoxy resin as the impregnating material, but peeling will occur between the wire and paraffin or within the paraffin layer, and the thermal efficiency of the coil will decrease.

Method used

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  • superconducting coil
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Such as Figure 5 As shown, the bobbin on which the superconducting wire 11 (SuperPower Corporation: width 6mm, thickness 0.1mm, critical current value Ic170A) is wound is set on the rotating part of the winding machine, and the end of the superconducting wire 11 is fixed on the winding machine. The inner cylinder (Ryoden Kasei: G10 (manufactured by FRP), inner radius 58 mm, outer radius 60 mm) was taken.

[0071] Next, a tension of 1 kgf was applied to the superconducting wire 11, and the superconducting wire 11 was wound into a coil shape (coil inner radius 58 mm, coil outer radius 130 mm, single cake shape).

[0072] When winding the superconducting wire 11 into a coil shape, for the superconducting wire 11 that is unwound between the bobbin and the inner tube for winding, the superconducting wire 11 is drawn from both ends of the coil in the superconducting wire 11 in the axial direction. Liquid epoxy resin is applied so that 15% of the length in the axial directio...

Embodiment 2

[0087] In Example 2, compared with Example 1, the ratio of the resin layer was increased. The other superconducting wires and the coiling conditions of the superconducting wire were the same as in Example 1.

[0088] Specifically, as Figure 6 As shown, when the superconducting wire 12 is wound into a coil shape, for the superconducting wire 12 that is unrolled between the bobbin and the inner tube for winding, according to the axial direction of the coil in the superconducting wire 12 Liquid epoxy resin is applied so that 5% of the length in the axial direction of the coil is left from both ends, and the winding is performed to impregnate the coils except the axial ends of the coil with epoxy resin. 90% of the length in the axial direction forms the resin layer 42 . Epoxy resin used ECCOSEAL W-19M2.

[0089] The coil in which the center portion of the superconducting wire 12 was impregnated with epoxy resin was cured at normal temperature for 16 hours or more.

[0090] Th...

Embodiment 3

[0096] In Example 3, the ratio of the resin layer was reduced compared with Example 1. The other superconducting wires and the coiling conditions of the superconducting wire were the same as in Example 1.

[0097] Specifically, as Figure 7As shown, when the superconducting wire 13 is wound into a coil shape, for the superconducting wire 13 that is unwrapped between the bobbin and the inner tube for winding, according to the axial direction of the coil in the superconducting wire 13 Liquid epoxy resin is applied so that 25% of the axial length of the coil is left from both ends, and winding is performed to impregnate the coils except the axial ends of the coil with epoxy resin. 50% of the length in the axial direction forms the resin layer 43 . Epoxy resin used ECCOSEAL W-19M2.

[0098] The coil in which the central portion of the superconducting wire 13 was impregnated with epoxy resin was cured at normal temperature for 16 hours or more.

[0099] This coil was placed in ...

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PUM

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Abstract

While preventing the peeling of the superconducting wire rods at both ends of the coil in the axial direction, it is possible to securely fix the entire superconducting coil and prevent a decrease in thermal efficiency. The present invention relates to a superconducting coil (100) provided with a superconducting wire (1) wound around a shaft, between radially adjacent superconducting wires, there are release material layers ( 3) Between radially adjacent superconducting wires, there is a resin layer (4) in a region other than the region where the release material layer is formed.

Description

technical field [0001] The present invention relates to superconducting coils. Background technique [0002] It is known to impregnate the superconducting coil with a resin or the like in order to fix the entire superconducting coil to increase the strength and to prevent a decrease in the thermal efficiency of the superconducting coil. [0003] The impregnation is performed, for example, by immersing the superconducting coil in a mixed solution of an impregnating material such as epoxy resin and a crosslinking agent, and then vacuumizing the mixed solution to spread the mixed solution between the wires forming the superconducting coil. The mixed liquid is solidified to perform impregnation. However, in a superconducting coil impregnated with epoxy resin, delamination occurs between layers of wire rods during cooling, leading to a decrease in critical current. In addition, it is also considered to use paraffin instead of epoxy resin as the impregnating material, but peelin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/06H01B12/02
CPCH01F6/06
Inventor 古川真
Owner FURUKAWA ELECTRIC CO LTD