JP2018011078A - High temperature superconducting coil and method of manufacturing high temperature superconducting coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a high temperature superconducting coil and the high temperature superconducting coil capable of simply and excellently fixing side plates for cooling end surfaces of the superconducting coil and the high temperature superconducting coil.SOLUTION: In a method of manufacturing a high temperature superconducting coil in which rare-earth high-temperature superconducting wires of the high temperature superconducting coil are separated from each other and fixed to side plates for cooling the superconducting coil end surfaces, tape-shaped polytetrafluoroethylene (PTFE) film 3 is used for insulation material between the rare-earth high-temperature superconducting wires 2, epoxy resin 6 is impregnated into the end surfaces of the superconducting coil 4 co-wound with this PTFE film, and the side plates 5 and the high temperature superconducting coil 4 co-wound with the PTFE film are fixed to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high-temperature superconducting coil and a method for manufacturing the high-temperature superconducting coil.

  Although conventional rare earth-based high-temperature superconducting wires have high tensile strength, the strength is low in the superconducting layer stacking direction (peeling direction), and degradation of the performance of the superconducting coil due to peeling becomes a problem.

  Moreover, the impregnation of the superconducting coil using the conventional rare earth-based high-temperature superconducting wire has prevented performance degradation by using a material having low adhesiveness such as paraffin or cyanoacrylate resin (see Patent Document 1 below).

JP2013-143460A

  However, as described above, since the adhesion of the superconducting coil using the conventional rare earth-based high-temperature superconducting wire is weak, the connection between the side plate serving as the cooling path and the superconducting wire is weak, and as a result, the cooling performance of the superconducting coil is also reduced. However, there was a structural improvement problem that increased the risk of thermal runaway (melting, loss of function).

  In view of the above situation, the present invention is capable of easily and satisfactorily fixing the high-temperature superconducting coil and the high-temperature superconducting coil with a side plate for cooling the end surface of the superconducting coil and the high-heat-conducting high-temperature superconducting coil. An object of the present invention is to provide a high-temperature superconducting coil that can be produced and a method of manufacturing the high-temperature superconducting coil.

In order to achieve the above object, the present invention provides
(1) is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, the insulation between the rare earth metal-based high-temperature superconducting wire A tape-shaped polytetrafluoroethylene (PTFE) film is used to form a PTFE film-coiled high - temperature superconducting coil, the PTFE film-coiled high - temperature superconducting coil is impregnated with epoxy resin, and the side plate and the PTFE film are co-wound high - temperature superconducting. A method of manufacturing a superconducting coil that is fixed to a coil, wherein the side plate is made of oxygen-free copper, high-purity aluminum, or glass fiber reinforced plastic .

[2] is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, the insulation between the rare earth metal-based high-temperature superconducting wire A method of manufacturing a superconducting coil using a tape-like polyimide film, and fixing a high-temperature superconducting coil co-wound with the polyimide film and the side plate with a copolymer of ethylene and methacrylic acid , and oxygen-free copper on the side plate It is characterized by using high purity aluminum or glass fiber reinforced plastic .

[3] is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, the insulation between the rare earth metal-based high-temperature superconducting wire A method for producing a superconducting coil using a tape-like PTFE film, wherein a high-temperature superconducting coil co-wound with the PTFE film and the side plate are fixed with a copolymer of ethylene and methacrylic acid , and the oxygen-free copper is attached to the side plate. It is characterized by using high purity aluminum or glass fiber reinforced plastic .

[4] is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and the high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-shaped insulating material between the rare earth metal-based high-temperature superconducting wire with polytetrafluoroethylene (PTFE) film to form a PTFE film co-wound high-temperature superconducting coil performs epoxy resin impregnated in the PTFE film co-wound high-temperature superconducting coil, and said side plates and said PTFE film co-wound high-temperature superconducting coil A superconducting coil for fixing , wherein the side plate is made of oxygen-free copper, high-purity aluminum, or glass fiber reinforced plastic .

[5] is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and the high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-shaped insulating material between the rare earth metal-based high-temperature superconducting wire A superconducting coil in which a polyimide film is used, and a high-temperature superconducting coil co-wound with the polyimide film and the side plate are fixed with a copolymer of ethylene and methacrylic acid , the side plate being oxygen-free copper, high-purity aluminum, or It is characterized by being a glass fiber reinforced plastic .

[6] is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and the high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-shaped insulating material between the rare earth metal-based high-temperature superconducting wire A superconducting coil using a PTFE film and fixing the high temperature superconducting coil co-wound with the PTFE film and the side plate with a copolymer of ethylene and methacrylic acid , wherein the side plate is oxygen-free copper, high-purity aluminum, or It is characterized by being a glass fiber reinforced plastic .

According to the present invention, in the high-temperature superconducting coil and the manufacturing method of the high-temperature superconducting coil, the side plate for cooling the end surface of the high-temperature superconducting coil and the high-heat-conducting high-temperature superconducting coil can be fixed easily and satisfactorily. Can improve safety and safety.

It is sectional drawing of the PTFE co-winding high temperature superconducting coil impregnated with the epoxy which shows 1st Example of this invention. It is a drawing substitute photograph which shows the PTFE film co-winding high temperature superconducting coil after the epoxy resin impregnation which shows 1st Example of this invention. It is a figure which shows the superconducting coil energization test result (before process-> epoxy resin impregnation) which shows 1st Example of this invention. It is sectional drawing of the high temperature superconducting coil fixed to the side plate with the copolymer of ethylene and methacrylic acid which shows 2nd Example of this invention. It is a drawing substitute photograph which shows the high temperature superconducting coil fixed to the side plate with the copolymer of ethylene and methacrylic acid which shows 2nd Example of this invention. It is a figure which shows the high-temperature superconducting coil energization test result (before processing-> the side plate adheres with the copolymer of ethylene and methacrylic acid) which shows 2nd Example of this invention.

Production method of the high temperature superconducting coil of the present invention, is separated between the rare earth-based high-temperature superconducting wires of the superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, the rare earth-based using tape-like polytetrafluoroethylene (PTFE) film to form a PTFE film co-wound high-temperature superconducting coil insulation between HTS wire performs epoxy resin impregnated in the PTFE film co-wound high-temperature superconducting coil, the side plates And the PTFE film co-wound high-temperature superconducting coil .

  Hereinafter, embodiments of the present invention will be described in detail.

FIG. 1 is a sectional view of an epoxy-impregnated PTFE co-wound high temperature superconducting coil according to a first embodiment of the present invention.

In this figure, 1 is a glass fiber reinforced plastic winding frame, 2 is a rare earth-based high-temperature superconducting wire, 3 is a tape-like PTFE film wound together with the rare-earth high-temperature superconducting wire 2, and 4 is a PTFE film co-wound high - temperature superconducting coil. 5 is a side plate of the superconducting coil fixed to the PTFE film co-wound high - temperature superconducting coil 4, and the side plate 5 of the high-temperature superconducting coil is insulated with a high heat conductive metal material (for example, oxygen-free copper, high-purity aluminum). Alternatively, glass fiber reinforced plastic is used. 6 is an epoxy resin impregnated in the high temperature superconducting coil 4 wound together with the PTFE film. The shape of the high-temperature superconducting coil may be either a single pancake or a double pancake.

FIG. 2 is a drawing-substituting photograph showing the PTFE film-wound high - temperature superconducting coil after impregnation with the epoxy resin.

Here, the specifications of this high temperature superconducting coil are as follows. The inner diameter is 50 mm, the outer diameter is about 60 mm, the number of turns is 40, the cooling method is liquid nitrogen immersion cooling, the superconducting wire is a rare earth high temperature superconducting wire, the wire width is about 4.0 mm, the wire The thickness is about 0.1 mm, the interlayer insulating material is a PTFE film, and the thickness is 0.025 mm.

FIG. 3 is a view showing the result of the high-temperature superconducting coil energization test (before treatment → epoxy resin impregnation). Here, ◆ indicates before the epoxy resin impregnation, and ■ indicates after the epoxy resin impregnation.

As described above, in the first embodiment of the present invention, the high-temperature superconducting coil in which the rare-earth high-temperature superconducting wire of the high- temperature superconducting coil is separated and the end face of the PTFE film co-wound high - temperature superconducting coil is fixed to the side plate for cooling. In the method of manufacturing a superconducting coil, a tape-like polytetrafluoroethylene (PTFE) film 3 is used as an insulating material between the rare earth-based high-temperature superconducting wires 2, and the PTFE film co-wound high - temperature superconducting coil 4 is impregnated with an epoxy resin 6. I did it.

Here, since the PTFE film 3 is hardly adhesive to the epoxy resin 6, the rare earth-based high-temperature superconducting wire 2 is separated, but the end face of the high-temperature superconducting coil is not covered with the PTFE film 3, so It adheres well.

FIG. 4 is a cross-sectional view of a high temperature superconducting coil secured to a side plate with a copolymer of ethylene and methacrylic acid according to a second embodiment of the present invention.

In this figure, 11 is a glass fiber reinforced plastic winding frame, 12 is a rare earth-based high-temperature superconducting wire, 13 is a tape-like polyimide film co-wound with the rare-earth high-temperature superconducting wire 2, and 14 is a polyimide film co-wound high - temperature superconducting coil. , 15 is a side plate of the high temperature superconducting coil fixed to the polyimide film co-wound high temperature superconducting coil 14, and 16 is a copolymer of ethylene and methacrylic acid that fixes the polyimide film co-wound high temperature superconducting coil 14 to the side plate 15 of the high temperature superconducting coil. is there.

The side plate 15 of the high-temperature superconducting coil is made of a highly heat-conductive metal material (for example, oxygen-free copper, high-purity aluminum) or glass fiber reinforced plastic that is insulated. Furthermore, the shape of the superconducting coil may be either a single pancake or a double pancake.

FIG. 5 is a drawing-substituting photograph showing the high-temperature superconducting coil fixed to the side plate with a copolymer of ethylene and methacrylic acid.

Here, the specifications of this high temperature superconducting coil are as follows. The inner diameter is 50 mm, the outer diameter is about 60 mm, the number of turns is 40, the cooling method is liquid nitrogen immersion cooling, the superconducting wire is a rare earth high temperature superconducting wire, the wire width is about 4.0 mm, the wire The thickness is about 0.1 mm, the interlayer insulating material is a polyimide film, and the thickness is 0.025 mm.

FIG. 6 is a diagram showing a current test result of the high-temperature superconducting coil (before treatment → fixed to the side plate with a copolymer of ethylene and methacrylic acid). Here, ♦ indicates before fusion of the copolymer of ethylene and methacrylic acid, and ■ indicates after the fusion of the copolymer of ethylene and methacrylic acid.

As is apparent from this figure, according to the method for manufacturing a high-temperature superconducting coil of the present invention, the generated voltage (mV) can be kept low even if the energizing current (A) is increased as compared with the conventional method. it can.

As described above, in the second embodiment of the present invention, a method for producing a high thermal conductivity high temperature superconducting coil in which the rare earth high temperature superconducting wire of the high temperature superconducting coil is separated from each other and the end surface of the high temperature superconducting coil is fixed to the side plate for cooling. In this case, a tape-like polyimide film is used as an insulating material between the rare earth-based high-temperature superconducting wires, and the high-temperature superconducting coil and the side plate wound together with the polyimide film are fixed with a copolymer of ethylene and methacrylic acid. did.

  A PTFE film may be used instead of the polyimide film described above.

Here, the copolymer 16 of ethylene and methacrylic acid has high viscosity, and even if the end faces of the high-temperature superconducting coil are bonded, the copolymer 16 of ethylene and methacrylic acid penetrates between the rare earth-based high-temperature superconducting wire 12. Therefore, there is no performance degradation due to peeling, and rather, the high-temperature superconducting coil can be well fixed to the side plate 15.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

Manufacturing method and high-temperature superconducting coil of the high-temperature superconducting coil of the present invention, conveniently the side plate and the high thermal conductive HTS coils for cooling the high-temperature superconducting coil end face, and can be satisfactorily secured, the improvement of cooling performance It can be used as a method for manufacturing a high-temperature superconducting coil capable of improving safety and the high-temperature superconducting coil.

DESCRIPTION OF SYMBOLS 1,11 Winding frame made of glass fiber reinforced plastic 2,12 Rare earth high temperature superconducting wire 3 Tape-like PTFE film co-wound with rare earth high temperature superconducting wire 4 PTFE film co-winding high - temperature superconducting coil 5 PTFE film co-winding high - temperature superconducting coil Side plate of superconducting coil fixed to 6 PTFE film co-wound epoxy resin impregnated in high - temperature superconducting coil 13 Tape-like polyimide film co-wound with rare earth high-temperature superconducting wire 14 Polyimide film co-wound high - temperature superconducting coil 15 Polyimide film co Side plate of high temperature superconducting coil fixed to wound high temperature superconducting coil 16 Copolymer of ethylene and methacrylic acid fixing polyimide film co-wound high temperature superconducting coil to side plate of high temperature superconducting coil

Claims (6)

Is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-shaped insulating material between the rare earth metal-based high-temperature superconducting wire with polytetrafluoroethylene (PTFE) film to form a PTFE film co-wound high-temperature superconducting coil performs epoxy resin impregnated into the PTFE film co-wound high-temperature superconducting coil, and the said side plate PTFE fill arm co-wound high-temperature superconducting coil A method of manufacturing a high-temperature superconducting coil, characterized in that oxygen-free copper, high-purity aluminum, or glass fiber reinforced plastic is used for the side plate . Is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-shaped insulating material between the rare earth metal-based high-temperature superconducting wire A manufacturing method of a superconducting coil using a polyimide film, wherein a high-temperature superconducting coil co-wound with the polyimide film and the side plate are fixed with a copolymer of ethylene and methacrylic acid, and the side plate is oxygen-free copper, high purity A method for producing a high-temperature superconducting coil, characterized by using aluminum or glass fiber reinforced plastic . Is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and in the fabrication method of high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-shaped insulating material between the rare earth metal-based high-temperature superconducting wire A method for producing a superconducting coil using a PTFE film, wherein a high-temperature superconducting coil co-wound with the PTFE film and the side plate are fixed with a copolymer of ethylene and methacrylic acid , comprising oxygen-free copper, high purity on the side plate A method for producing a high-temperature superconducting coil, characterized by using aluminum or glass fiber reinforced plastic . Is separated between the rare earth-based high-temperature superconducting wire of the high-temperature superconducting coil, and the high-temperature superconducting coil to fix the side plates for cooling the high-temperature superconducting coil end face, a tape-like polytetrafluoroethylene insulation material between the rare earth metal-based high-temperature superconducting wire with ethylene (PTFE) film to form a PTFE film co-wound high-temperature superconducting coil performs epoxy resin impregnated into the PTFE film co-wound high-temperature superconducting coil performs the fixation of the said side plates PTFE film co-wound high-temperature superconducting coil A high-temperature superconducting coil , wherein the side plate is oxygen-free copper, high-purity aluminum, or glass fiber reinforced plastic . In a high-temperature superconducting coil that separates the rare-earth high-temperature superconducting wire of the high-temperature superconducting coil and is fixed to a side plate for cooling the end surface of the high-temperature superconducting coil , a tape-like polyimide film is used as an insulating material between the rare-earth high-temperature superconducting wires. A superconducting coil for fixing a high-temperature superconducting coil co-winded with the polyimide film and the side plate with a copolymer of ethylene and methacrylic acid , the side plate being oxygen-free copper, high-purity aluminum, or glass fiber reinforced A high temperature superconducting coil characterized by being plastic . In a high-temperature superconducting coil that separates the rare-earth high-temperature superconducting wire of the high-temperature superconducting coil and is fixed to a side plate for cooling the end surface of the high-temperature superconducting coil, a tape-like PTFE film is used as an insulating material between the rare-earth high-temperature superconducting wires. A superconducting coil used to fix the high temperature superconducting coil co-wound with the PTFE film and the side plate with a copolymer of ethylene and methacrylic acid , the side plate being oxygen-free copper, high-purity aluminum, or glass fiber reinforced A high temperature superconducting coil characterized by being plastic .

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