JP2001291611A - Superconducting coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superconducting coil which is capable of keeping superconducting wire high in its limiting current and N value. SOLUTION: In a superconducting coil, initial stress is given beforehand to a superconducting wire 12 wound on a winding frame 10 in its circumferential direction, when the wire 12 is fixed to an electrode 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting coil device having a high tensile strength when a tape-shaped superconducting wire is wound into a coil.

[0002]

2. Description of the Related Art Generally, a superconducting coil device, whether it is a metallic superconducting wire or an oxide superconducting wire, is wound at the beginning and end of a coil when a normal conducting material such as a copper plate is wound. It is provided with a so-called electrode unit that connects to a metal. Through this electrode part, the superconducting coil device
Current is supplied from a power supply.

[0003] This superconducting coil device has been widely applied to coils of stationary power devices such as transformers and current limiters, but the procedure shown in FIG. 12 has been employed in producing the coil.

In the superconducting coil device, a tape-shaped superconducting wire 2 is soldered to an electrode portion 1 made of, for example, a copper plate, and then a tension is applied to the superconducting wire 2 along a circumferential direction of a cylindrical winding frame 3. To form a coil.

[0005]

In the conventional superconducting coil device adopting the procedure for winding the superconducting wire 2 shown in FIG.
There were some bugs and inconvenient problems.

In the superconducting coil device, the superconducting wire 2 is wound along the circumferential direction of the bobbin 3, and when producing a coil, the superconducting wire 2 is wound first after soldering the electrode portion 1. For this reason, the tension is hardly applied to the portion at the beginning of winding, or the tension is excessively applied. Therefore, as a result of long-term use, the coil may be mechanically deteriorated such as deformed or cracked.

If the tension of the superconducting wire 2 at the beginning of winding is excessive or insufficient, the superconducting coil device has a low index of, for example, a critical current or an n value (a rising slope of current / voltage). It was also a factor that caused performance degradation.

As described above, the conventional superconducting coil device has several problems, and it has been desired to realize a new coil which can maintain quality assurance for a long time even after being used for many years.

The present invention has been made in view of the above circumstances. In winding a superconducting wire into a coil, the superconducting wire is soldered to the electrode while applying tension to the superconducting wire. It is an object of the present invention to provide a superconducting coil device that uniformly applies a tensile stress without excess or shortage and maintains good quality for a long time even if it has been used for many years.

[0010]

In order to achieve the above object, a superconducting coil device according to the present invention comprises a superconducting wire rod wound along the circumferential direction of a bobbin as set forth in claim 1. In the superconducting coil device including the superconducting wire and an electrode fixed to the superconducting wire, the superconducting wire is given an initial stress when the superconducting wire is fixed to the electrode by a fixing means.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 2, in a superconducting coil device including a superconducting wire wound along a circumferential direction of a bobbin and an electrode portion fixed to the superconducting wire. The superconducting wire is fixed to the fixing plate provided on the winding frame by fixing means, and when the superconducting wire is fixed to the electrode part by fixing means, after being fixed while applying tension, from the fixing plate to the electrode part. And the fixing plate is removed from the bobbin.

Further, a superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 3, the fixing means for fixing the superconducting wire to the electrode portion is a solder.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as set forth in claim 4, the fixing means for fixing the superconducting wire to the fixing plate is one of a solder and an epoxy adhesive. .

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 5, the superconducting wire is obtained by fixing a plurality of superconducting wires by a solder portion and winding the superconducting wires along the circumferential direction of the bobbin.

Further, a superconducting coil device according to the present invention
In order to achieve the above object, as described in claim 6, the superconducting wire is not provided with an insulating coating.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 7, the superconducting wire is provided with an insulating coating, and a portion to be fixed to the electrode portion is peeled off from the stranded wire of the insulating coating, and is fixed to the electrode portion as a round wire. It was made.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 8, the superconducting wire is formed in a pancake shape when wound along the circumferential direction of the winding frame.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 9, when the superconducting wire is wound along the circumferential direction of the bobbin, the superconducting wire is formed in a pancake shape and the pancake shape is axially moved. Are arranged and combined to form a coil.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 10, in a superconducting coil device including a superconducting wire wound along a circumferential direction of a bobbin and an electrode portion fixed to the superconducting wire. And fixing the superconducting wire to the fixing plate provided on the winding frame by fixing means, and fixing the superconducting wire to the electrode portion while applying tension, and then fixing the superconducting wire from the fixing plate to the electrode portion. A first coil formed by cutting the superconducting wire and further removing the fixing plate from the bobbin, and fixing the another superconducting wire to another fixing plate provided on the another bobbin with fixing means. When fixing to the another electrode portion by a fixing means, after fixing while applying tension, the another superconducting wire from the another fixing plate to the another electrode portion is cut, and further another fixing is performed. Another board above The formed removed from the frame 2
The coil, the electrode portion of the first coil, and the electrode portion of the second coil are connected by a connecting portion.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 11, a winding frame around which a superconducting wire is wound is provided with a groove defined by a protruding portion provided along a circumferential direction.

Further, the superconducting coil device according to the present invention comprises:
To achieve the above object, as described in claim 12, the first coil and the second coil are both clockwise and counterclockwise when the superconducting wire is wound along the circumferential direction of the bobbin. One of them is selected.

Further, a superconducting coil device according to the present invention
In order to achieve the above object, the superconducting wire according to claim 1 or 2 is applied to a primary winding of a transformer, and the superconducting wire according to claim 10 is applied to a transformer. This is applied to the secondary winding.

Further, the superconducting coil device according to the present invention comprises:
In order to achieve the above object, as described in claim 14, a coil is manufactured by combining a plurality of superconducting wires according to claim 1 or 2 having different diameters, and one of a current limiter and a permanent current switch is manufactured. It is applied to

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a superconducting coil device according to the present invention will be described below with reference to the drawings and reference numerals attached to the drawings.

FIG. 1 is a conceptual diagram used for describing a first embodiment of a superconducting coil device according to the present invention. In FIG. 1, (a) is a conceptual diagram used for explaining a temporary winding start of the superconducting wire with respect to the bobbin, and (b)
FIG. 3 is a conceptual diagram used for explaining a temporary winding intermediate period of the superconducting wire with respect to the bobbin, and FIG. 4C is a conceptual diagram used to explain the actual winding start period of the superconducting wire with respect to the bobbin. FIG.

The superconducting wire applied to the superconducting coil device according to the present invention is a bismuth-based material having no insulation coating applied thereto, specifically (BiPb) ₂ Sr ₂ Ca ₂ Cu ₃ O.
y (Bi2223) Ag sheath tape, width 3.8m
m, thickness 0.25 mm.

In the superconducting coil device according to the present embodiment, when manufacturing a coil, first, as shown in FIG. 1A, a copper plate fixing plate 11 provided on a cylindrical winding frame 10 is coated with Ag.
The end of the superconducting wire 12 of the sheath Bi2223 is
3 and a solder positioning portion 15 is provided at a position where the intermediate portion of the superconducting wire 12 is expected to come into contact with the electrode portion 14 in advance, and the tensile force of 10 MPa is applied in the clockwise direction indicated by the arrow CW with a tensile stress of 10 MPa. 12 is wound along the circumferential direction of the winding frame 10.

Next, the solder positioning portion 1 of the superconducting wire 12
As shown in FIG. 1B, when the superconductor wire 5 is brought into contact with the electrode portion 14 as shown in FIG. 1B, the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13 while applying tension thereto. ), The superconducting wire 12 between the fixing plate 11 and the electrode portion 14 is cut, and the fixing plate 11 is removed.
An initial stress is applied to the superconducting wire 12 fixed to the electrode portion 14.

The superconducting wire 12 to which the initial stress based on the tension due to the winding and the fixing force of the solder portion 13 is applied is shown in FIG.
As shown in (c), a substantial winding start period is started, and the winding is wound around the winding frame 10 in a clockwise direction indicated by an arrow CW to produce a coil.

As described above, in the present embodiment, the superconducting wire 1
2 at the start of winding, the fixing portion 11 and the electrode portion 14
After applying an initial stress to the superconducting wire 12 in advance and cutting it from the front side of the electrode portion 14 to substantially set the winding start time, the superconducting wire 12 is locally wound around the winding start portion of the electrode portion 14. Since there was no disconnection and uniform stress was applied,
Even if the coil has been used for many years, it is possible to guarantee a high quality coil in which the n value is also kept high in combination with keeping the critical current high.

In the present embodiment, when the coil was immersed and cooled in liquid nitrogen and energized, good results were obtained in both critical current and n value.

FIG. 2 is a conceptual diagram used for explaining a second embodiment of the superconducting coil device according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals.

The superconducting wire applied to the superconducting coil device according to the present invention is a bismuth-based material having no insulation coating.
Specifically, Bi ₂ Sr ₂ CaCu ₂ Oy (Bi221
2) Ag sheath tape of width 3.8 mm, thickness 0.2
5 mm.

In this embodiment, first, A
The end of the superconducting wire 12 of the sheath Bi 2212 is about 2c.
m with the epoxy adhesive 16 and
A solder positioning portion 15 is attached to a position where the intermediate portion of the superconducting wire 12 is expected to come into contact with the electrode portion 14 in advance, and the superconducting wire 12 is wound in a clockwise direction indicated by an arrow CW with a tensile stress of 5 MPa. It is wound along the circumferential direction.

Next, the solder positioning portion 1 of the superconducting wire 12
When the superconducting wire 5 is in contact with the electrode portion 14, the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13 while applying tension to the superconducting wire 12, and then the superconducting wire 12 is formed along the circumferential direction of the bobbin 10.
To form a coil.

As described above, in the present embodiment, the superconducting wire 1
2 was fixed to the electrode portion 14 with the solder portion 13, the end of the superconducting wire 12 was fixed with an epoxy adhesive 16, and an appropriate initial stress was applied in advance to the position where the electrode portion 14 of the superconducting wire 12 abuts. Thus, a high-quality coil in which the critical current and the n value are kept high can be guaranteed.

In this embodiment, when the coil was immersed and cooled in liquid nitrogen and energized, good experimental results were recognized for both the critical flow and the n value.

FIG. 3 is a conceptual diagram used for explaining a third embodiment of the superconducting coil device according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals.

The superconducting wire applied to the superconducting coil device according to the present invention is an yttrium-based material having no insulating coating, specifically, YBa ₂ Cu ₃ Oy (Y123) / XY.
Z hastelloy substrate tape, width 10mm, thickness 0.1
mm.

In the present embodiment, first, a first superconducting wire 12a and a second superconducting wire 12b of a Hastello board tape are superposed on a fixing plate 11 made of a copper plate provided on a cylindrical winding frame 10, and a soldering portion is formed. At the same time, the solder positioning portion 15 is attached to a position where the intermediate portion of the first superconducting wire 12a is expected to come into contact with the electrode portion 14 with a tensile stress of 1 MPa in the clockwise direction indicated by the arrow CW. The first superconducting wire 12a and the second superconducting wire 12b are wound along the circumferential direction of the bobbin 10. The first superconducting wire 12a
And the second superconducting wire 12b are fixed to each other by the solder portion 13.

Next, when the solder positioning portion 15 of the first superconducting wire 12a comes into contact with the electrode portion 14, the present embodiment employs two superposed first superconducting wires 12a fixed by the solder portion 13.
After the first superconducting wire 12a is fixed to the electrode portion 14 by the solder portion 13 while applying tension to the second superconducting wire 12b and the second superconducting wire 12b, the first superconducting wire 12a and the second superconducting wire 12a are arranged along the circumferential direction of the winding frame 10. The wire 12b is wound to form a coil.

As described above, according to this embodiment, when the first superconducting wire 12a and the second superconducting wire 12b fixed to each other by the solder portion 13 are fixed to the electrode portion 14 by the solder portion 13, the two superposed first Each end of the superconducting wire 12a and the second superconducting wire 12b is fixed with a fixing plate 11,
Since a proper initial stress is applied in advance to the positions where the respective electrode portions 14 of the first superconducting wire 12a and the second superconducting wire 12b are in contact with each other, it is possible to guarantee a high quality coil in which the critical current and the n value are kept high. Can be. In the case of the present embodiment, it is effective for a large current.

FIG. 4 is a conceptual diagram used for describing a fourth embodiment of the superconducting coil device according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals.

The superconducting wire applied to the superconducting coil device according to the present invention is obtained by twisting and insulating three NbTi-based wires of a CuNi / Cu matrix having a wire diameter of 0.1 mm.

In this embodiment, first, the superconducting wire 12 is stripped of insulating coating over a length of several tens of cm from its end, and is fixed to the fixing plate 11 provided on the winding frame 10 as round wires 17a, 17b, 17c. It is fixed by the solder part 13. In addition, round wire 17
a, 17b, and 17c are provided in advance at the intermediate portion thereof with the electrode portion 14;
The solder positioning portion 15 is attached to the position where the contact is expected to come into contact, and is wound along the circumferential direction of the bobbin 10 with a tensile stress of 1 MPa in the counterclockwise direction indicated by the arrow CCW.

Next, when the solder positioning portions 15 of the round wires 17a, 17b, 17c come into contact with the electrode portions 14, the present embodiment provides the round wires 17a, 17b, 17c while applying a tensile tension to the round wires 17a, 17b, 17c. After fixing the electrodes 17b and 17c to the electrode part 14 with the solder part 13, the superconducting wire 12 is wound along the circumferential direction of the winding frame to produce a coil.

As described above, in the present embodiment, of the superconducting wire 12 in which three wires are twisted and insulated and covered, the respective ends of the round wires 17a, 17b and 17c are fixed to the fixing plate 11.
And the round wires 17a, 17b, 17
Since a proper initial stress is given in advance to a position where each of the electrode portions 14 a is in contact with each other, it is possible to guarantee a high-quality coil in which the critical current and the n value are kept high.

FIG. 5 is a conceptual diagram used for describing a fifth embodiment of the superconducting coil device according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals. 5A is a conceptual diagram of a first coil used for explaining a temporary winding start of a superconducting wire with respect to a bobbin, and FIG. 5B is a conceptual view of a superconducting wire with respect to a bobbin. FIG. 4 is a conceptual diagram of a second coil used for explaining a temporary winding start period, and FIG. 4C is a view for explaining that a first coil and a second coil are concentrically arranged and combined. FIG.

The superconducting coil device according to the present invention is constituted by combining a first coil 18a having a diameter of about 20 cm and a second coil 18b having a diameter of about 21.4 cm.

As shown in FIG. 5 (a), the first coil 18a has an end portion of the superconducting wire 12 fixed to a fixing plate 11 made of copper plate provided on a cylindrical winding frame 10 by a solder portion 13, and A solder positioning portion 15 is attached to a position where an intermediate portion of the superconducting wire 12 is expected to contact the electrode portion 14 in advance,
The superconducting wire 12 is wound along the circumferential direction of the bobbin 10 while applying tension in the counterclockwise direction indicated by the arrow CCW.

Next, the solder positioning portion 1 of the superconducting wire 12
When the abutment 5 contacts the electrode 14, the present embodiment is similar to the first embodiment in that the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13 while applying tension, and then the fixed portion 11 While cutting the superconducting wire 12 up to 14,
The fixing plate 11 is removed, and an initial stress is applied to the superconducting wire 12 fixed to the electrode portion 14.

The superconducting wire 12 to which the initial stress is applied is
After being wound again in the counterclockwise direction indicated by the arrow CCW along the circumferential direction of the winding frame 10 again, the first coil 1 of the solenoid
8a is produced.

On the other hand, as shown in FIG. 5B, the end of the superconducting wire 12 is fixed to the fixed plate 11 made of copper plate provided on the cylindrical winding frame 10 by the solder portion 13 as shown in FIG. After that, when the superconducting wire 12 is fixed to the electrode portion 14 with the solder portion 13 in the same manner as the manufacturing procedure of the first coil 18a, the superconducting wire 12 is cut after applying an initial stress, and the cut superconducting wire 12 is indicated by an arrow CW. After being wound clockwise, the second coil 18b of the solenoid is manufactured.

The first coil 18 thus manufactured
The a and the second coil 18b are arranged concentrically as shown in FIG. 5C, and the electrode portions 14, 14 are connected by a connecting portion 19 such as a copper plate.

In this embodiment, when the superconducting coil device is manufactured by combining the first coil 18a and the second coil 18b, the superconducting wire 12 of the first coil 18a is turned counterclockwise with respect to the bobbin 10. While being wound, the superconducting wire 12 of the second coil 18b is wound clockwise around the winding frame 10 so that the electrode portion 1 of each of the coils 18a and 18b is wound.
4 and 14 are connected by a connecting portion 19, while each coil 18
a, 18b are connected to the superconducting wires 12, 12 respectively.
When attaching the superconducting wires 12,1, while applying tension,
Since an appropriate initial stress is given to the end of the coil 2 in advance, a high quality coil in which the critical current and the n value are kept high can be guaranteed.

FIG. 6 is a conceptual diagram used for describing a sixth embodiment of the superconducting coil device according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals.

As in the first embodiment, the superconducting wire applied to the superconducting coil device according to the present invention is a bismuth-based material to which no insulating coating is applied, specifically (BiPb) ₂ Sr
₂ Ca ₂ Cu ₃ Oy (Bi2223) AgMn sheath tape, 3.8 mm wide and 0.25 mm thick.

As shown in FIG. 6, the superconducting coil device according to the present embodiment
The end of the superconducting wire 12 of i2223 was fixed with the insulating tape 20 and the solder positioning portion 15 was attached to a position where the middle portion of the superconducting wire 12 was expected to abut on the electrode portion 14 in advance, as indicated by the arrow CCW. The superconducting wire 12 is wound in a counterclockwise direction with a tensile stress of 10 MPa along the circumferential direction of the winding frame 10, and the superconducting wire 12 is fixed by the solder portion 13 at the electrode portion 14, and is again shown by the arrow CCW. The coil is wound counterclockwise to produce a pancake-shaped unit coil 21.

The unit coil 21 formed in a pancake shape
As shown in FIG. 7, one unit coil 22 is manufactured by arranging and combining them along the axial direction of the electrode unit 14.

As described above, in the present embodiment, the pancake unit coils 21 are arranged along the axial direction of the electrode unit 14.
In producing one unit coil 22 by combining the superconducting wires 12 with the electrode portions 14 for each unit coil 21.
At the time of fixing, a proper initial stress is given in advance while applying a tensile tension, so that a high quality coil in which the critical current and the n value are kept high can be guaranteed.

In this embodiment, when the coil is immersed and cooled in liquid nitrogen of 20K and energized, the critical current, n
Both values showed good experimental results.

FIG. 8 is a conceptual diagram used for describing a seventh embodiment of the superconducting coil device according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals.

As in the first embodiment, the superconducting wire applied to the superconducting coil device according to the present invention is a bismuth-based material having no insulating coating, specifically (BiPb) ₂ Sr
₂ Ca ₂ Cu ₃ Oy (Bi2223) Ag sheath tape with a width of 3.8 mm and a thickness of 0.25 mm.

As shown in FIG. 8, the superconducting coil device according to the present embodiment has projecting portions 23, 23 along the circumferential direction.
The fixing plate 11 is provided on the cylindrical winding frame 10 having the groove 24 defined by the above, and the fixing plate 11 is provided with an Ag sheath Bi2223.
The end of the superconducting wire 12 of FIG.
3 and a solder positioning portion 15 is attached at a position where the intermediate portion of the superconducting wire 12 is expected to come into contact with the electrode portion 14 in advance, and a tensile stress of 10 MPa is applied in a counterclockwise direction indicated by an arrow CCW. The superconducting wire 12 is wound into the bobbin 1
It is wound along the groove 24 of 0.

When the solder positioning portion 15 of the superconducting wire 12 comes into contact with the electrode portion 14, in this embodiment, the superconducting wire 12 is fixed to the electrode portion 14 by the solder portion 13 while the tensile force is applied, and then the fixing plate 11 is fixed. While cutting the superconducting wire 12 between the electrode portion 14 and the fixing plate 11,
An initial stress is applied to the superconducting wire 12 fixed to the electrode portion 14.

The superconducting wire 12 to which the tensile stress due to the winding and the initial stress based on the fixing force of the solder portion 13 are given is wound again along the groove 24 of the winding frame 10 in the counterclockwise direction indicated by the arrow CCW. Turn to make a coil.

As described above, according to this embodiment, when the superconducting wire 12 is fixed to the electrode portion 14 of the superconducting wire 12 wound along the groove 24 of the winding frame 10, an appropriate initial stress is given in advance while applying a tensile tension. Thus, a high-quality coil in which the critical current and the n value are kept high can be guaranteed.

In this embodiment, the coil is 77.3K.
When immersed in liquid nitrogen for cooling and energized, good results were obtained for both critical current and n value.

FIG. 10 is a conceptual diagram used for explaining an eighth embodiment of the superconducting coil device according to the present invention.
The same parts as those in the first and fifth embodiments are denoted by the same reference numerals.

The superconducting coil device according to the present invention is applied to a transformer, and has a primary winding 26 facing an iron core 25.
a and 26b are wound in the circumferential direction of the winding frame 10 in which the groove 24 is formed in the clockwise direction indicated by the arrow CW, and the first winding is performed.
As in the embodiment, when the coil is fixed to the electrode portion 14, a coil in which an initial stress is applied to the superconducting wire 12 in advance is used, while a secondary winding 27 arranged in an intermediate portion between the primary windings 26a and 26b is used. 5 the first coil 1 of the fifth embodiment
8A and a coil in which the second coil 18b is combined. In the first coil 18a and the second coil 18b, a groove 24 is formed in the bobbin 10, and the superconducting wire 12 is wound along the groove 24. Further, even if the winding direction of the superconducting wire 12 of the coil applied to the primary windings 26a and 26b and the winding direction of the superconducting wire 12 of the coil applied to the secondary winding 27 are the same,
The directions may be opposite to each other. Other configurations are the same as those of the first embodiment and the fifth embodiment, and a description thereof will be omitted.

As described above, in the present embodiment, the primary winding 26
a, 26b and the secondary winding 27 together with the superconducting wire 12
When the electrode portion 14 is fixed to the superconducting wire 12, an appropriate initial stress is applied to the superconducting wire 12, so that a transformer that guarantees high performance such as n value can be realized.

FIG. 11 is a conceptual diagram used for explaining a ninth embodiment of the superconducting coil device according to the present invention.
The same components as those of the first embodiment are denoted by the same reference numerals.

The superconducting coil device according to the present invention is applied to a current limiter or a permanent current switch. The superconducting wire 12 is wound along a groove 24 formed in the winding frame 10 and the winding procedure is changed. As in the first embodiment, the electrode unit 1
When the superconducting wire 12 is fixed to the superconducting wire 4, several or several tens of unit coils 21a, 21b, 21c... Unit coil 22
It is formed in.

As described above, in the present embodiment, the superconducting wire 12 to be fixed to the electrode portion 14 is produced by applying an appropriate initial stress in advance to a coil, and the coil is incorporated in a current limiting device or the like. The performance can be maintained high to guarantee the quality of the current limiter and the like.

[0075]

As described above, in the superconducting coil device according to the present invention, when the superconducting wire is fixed to the electrode portion and wound along the circumferential direction of the bobbin to produce a coil, the An initial stress is applied to the superconducting wire to be fixed in advance to equalize the load and prevent local disconnection of the wire, etc., so that a high-quality coil with a high critical current and high n value can be guaranteed. .

[Brief description of the drawings]

FIG. 1 is a conceptual diagram used to explain a first embodiment of a superconducting coil device according to the present invention, and FIG. 1 (a) is used for explaining a temporary winding start period of a superconducting wire with respect to a bobbin; (B) is a conceptual diagram used to explain the temporary winding intermediate period of the superconducting wire with respect to the bobbin, and (c) is the actual winding start period of the superconducting wire with respect to the bobbin. The conceptual diagram used for description.

FIG. 2 is a conceptual diagram used for describing a second embodiment of the superconducting coil device according to the present invention.

FIG. 3 is a conceptual diagram used to explain a third embodiment of a superconducting coil device according to the present invention.

FIG. 4 is a conceptual diagram used for describing a fourth embodiment of a superconducting coil device according to the present invention.

FIG. 5 is a conceptual diagram used to explain a fifth embodiment of a superconducting coil device according to the present invention, and FIG. 5 (a) is used for explaining a temporary winding start period of a superconducting wire with respect to a bobbin; FIG. 1B is a conceptual diagram of the first coil, FIG. 2B is a conceptual diagram of a second coil used to explain a temporary winding start of the superconducting wire with respect to the bobbin, and FIG. 2C is a conceptual diagram of the first coil and the second coil. FIG. 3 is a conceptual diagram used for explaining that the elements are concentrically arranged and combined.

FIG. 6 is a conceptual diagram used to explain a sixth embodiment of a superconducting coil device according to the present invention.

FIG. 7 is a conceptual diagram used to explain a unit coil in which unit coils manufactured in a pancake shape are arranged and combined along the axial direction of an electrode unit.

FIG. 8 is a conceptual diagram used for describing a seventh embodiment of the superconducting coil device according to the present invention.

9 is an enlarged partial cross-sectional view of a portion A in FIG. 8;

FIG. 10 is a conceptual diagram used to explain an eighth embodiment of the superconducting coil device according to the present invention.

FIG. 11 is a conceptual diagram used for describing a ninth embodiment of a superconducting coil device according to the present invention.

FIG. 12 is a conceptual diagram showing a conventional superconducting coil device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 electrode part 2 superconducting wire 3 reel 10 reel 11 fixing plate 12 superconducting wire 12 a first superconducting wire 12 b second superconducting wire 13 solder part 14 electrode part 15 solder positioning part 16 epoxy adhesive 17 a, 17 b, 17 c wire 18 a 1 coil 18b second coil 19 connecting part 20 insulating tape 21 unit coil 22 unit coil 23 projecting part 24 groove part 25 iron core 26a, 26b primary winding 27 secondary winding

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Okuma 4-1 Egasaki-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Electric Power Technology Research Institute, Tokyo Electric Power Company (72) Inventor Reifumi Sato E, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture 4-1, Kasaki-cho, Tokyo Electric Power Co., Inc. (72) Inventor Eriko Yoneda 2--4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Keihin Plant, Toshiba Corporation (72) Mamoru Shimada Yokohama, Kanagawa Prefecture 2-4, Suehirocho, Tsurumi-ku, Toshiba, Tokyo Toshiba Keihin Works Co., Ltd. (72) Inventor Katsumasa Araoka 2-1 Ukishimacho, Kawasaki-ku, Kawasaki-shi, Kanagawa Inside the Toshiba Hamakawasaki Plant

Claims (14)

[Claims] 1. A superconducting coil device comprising a superconducting wire wound along a circumferential direction of a bobbin and an electrode portion fixed to the superconducting wire, wherein the superconducting wire is fixed to the electrode portion. A superconducting coil device characterized in that an initial stress is applied when the superconducting coil is fixed by using. 2. A superconducting coil device comprising a superconducting wire wound along a circumferential direction of a bobbin and an electrode portion fixed to the superconducting wire, wherein the superconducting wire is provided on the bobbin. When fixing to the fixing plate by the fixing means and fixing to the electrode portion by the fixing means, after fixing while applying tension, the fixing plate is cut from the electrode portion to the electrode portion, and the fixing plate is further fixed to the winding frame. A superconducting coil device which has been removed from the above. 3. The superconducting coil device according to claim 1, wherein the fixing means for fixing the superconducting wire to the electrode portion is solder. 4. The superconducting coil device according to claim 2, wherein the fixing means for fixing the superconducting wire to the fixing plate is one of a solder and an epoxy adhesive. 5. The superconducting coil device according to claim 1, wherein the superconducting wire is formed by fixing a plurality of superconducting wires at a solder portion and winding the superconducting wires along a circumferential direction of a bobbin. 6. The superconducting coil device according to claim 1, wherein the superconducting wire is not provided with an insulating coating. 7. The superconducting wire material according to claim 1, wherein an insulating coating is applied, and a portion to be fixed to the electrode portion is peeled off from the stranded wire of the insulating coating to be fixed to the electrode portion as a round wire. 3. The superconducting coil device according to claim 1. 8. The superconducting coil device according to claim 1, wherein the superconducting wire is formed in a pancake shape when wound along the circumferential direction of the bobbin. 9. The superconducting wire is formed in a pancake shape when wound along the circumferential direction of the bobbin, and the superconducting wire is arranged and combined in the axial direction to form a coil. The superconducting coil device according to claim 1. 10. A superconducting coil device comprising a superconducting wire wound along a circumferential direction of a bobbin and an electrode portion fixed to the superconducting wire, wherein the superconducting wire is provided on the bobbin. Affixing to the plate with the fixing means, and fixing to the electrode portion by the fixing means, after fixing while applying tension, cutting the superconducting wire from the fixing plate to the electrode portion, and further fixing the fixing plate The first coil formed by removing from the winding frame and the another superconducting wire are fixed to another fixing plate provided on the another winding frame by fixing means, and are fixed to the another electrode portion by fixing means. At this time, after fixing while applying tension, cut the another superconducting wire from the another fixing plate to the another electrode portion,
Further, a second coil formed by removing the another fixing plate from the another winding frame, and an electrode portion of the first coil and an electrode portion of the second coil are connected by a connecting portion. Superconducting coil device. 11. The superconducting coil device according to claim 1, wherein the winding frame around which the superconducting wire is wound has a groove defined by a protruding portion provided along a circumferential direction. 12. The first coil and the second coil both select one of a clockwise direction and a counterclockwise direction when the superconducting wire is wound along the circumferential direction of the bobbin. The superconducting coil device according to claim 8, wherein 13. The superconducting wire according to claim 1 or 2 is applied to a primary winding of a transformer, and the superconducting wire according to claim 10 is applied to a secondary winding of a transformer. Superconducting coil device. 14. A superconducting coil device, wherein a coil is produced by combining a plurality of superconducting wires according to claim 1 or 2 having different diameters and applied to one of a current limiter and a permanent current switch.