JPH11340029A - Oxide super-conducting coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the manufacture of an oxide super-conducting coil of multi-layer structure, by comprising a plurality of unit coils wound with an oxide super-conducting wire material, and allowing the unit coils to comprise a spool while an end part of the oxide superconducting wire material is connected to a terminal on an insulating protruding part of the spool. SOLUTION: With an insulating recessed/protruding core formed as a spool, an upper step part and a lower step part provided with an insulating protruding part in between are wound with an upper coil and a lower coil, and a terminal of an oxide super-conducting wire material fixed to provide one unit coil group 9a and the other unit coil group 10a. A unit coil group 9a is provided at a bottom stage, the other unit coil group 12a is laminated over it, and further, another unit coil group 9a is laminated over it. A positive feeding terminal 28 from an external power source is jointed to an L-shaped terminal plate wherein a positive terminal 17a of the lower coil of the unit coil group 9a at the bottom stage is fixed, while a negative feeding terminal 30 is jointed and fixed to an upper-stage L-shaped terminal part 29 wherein the negative terminal of the unit coil group 9a at the upper stage is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxide superconducting coil composed of a plurality of unit coil groups wound with an oxide superconducting wire, and more particularly to a winding structure of a unit coil group laminated with a unit coil group. , And a laminated joint structure.

[0002]

2. Description of the Related Art Conventionally, NbTi and N
A metallic superconductor such as b ₃ Sn is used. But,
These metallic superconductors have a low critical temperature, and expensive liquid helium is generally used for cooling them. However, in 1987, oxide superconductors that became superconductors at the boiling point of liquid nitrogen (77 K) were discovered, and if these could be put to practical use, they were inexpensive and easy to handle. It is possible to manufacture a high magnetic field generating coil that cannot be achieved.

[0003] In view of the above, application of oxide superconducting wires to the field of energy equipment, application of devices using superconducting thin films, and the like are expected. At present, a powder-in-tube method, in which superconducting powder is filled in a metal sheath such as silver and then drawn or rolled, or a substrate is continuously immersed in a suspension containing superconducting powder, 100,000 A / cm in a high magnetic field in a temperature range of 20 K or less for short wires by a dip coating method of adsorbing the suspension
Development is underway until a critical level of practical level exceeding ² is obtained.

[0004] In the oxide superconducting coil, an oxide powder is inserted into a silver pipe, and a wire obtained by processing these is formed into a solenoid shape, and the coil is heat-treated to form a spiral oxide superconducting coil. What obtains a coil is
-251929. Also, a plurality of coils wound in a spiral shape are formed on a non-superconducting substrate having a spiral hole with a hole at the center, and an inner coil terminal and an outer coil terminal wound in a spiral shape are obtained. U.S. Pat. No. 5,173,678 discloses that a superconducting body is formed by inclining a cylindrical multilayer coil and joining the superconductors inside and outside.

[0005] Further, although the conditions are different from those of the production of an oxide superconducting coil in which a coil is wound and then subjected to a heat treatment to obtain a coil,
Japanese Patent Application Laid-Open No. 5-326248 discloses a superconducting coil formed by laminating and joining a plurality of double pancake wound coils.

However, in the production of an oxide superconducting coil, since a flexible oxide superconducting wire is wound and then subjected to a heat treatment to obtain an oxide superconducting coil, it is extremely difficult to laminate the superconducting coil. there were. In addition, the oxide superconducting wire after heat treatment is vulnerable to impact and deformation and easily breaks, and it is not possible to apply mechanical stress, so it is impossible to adjust the position of the joint terminal, and manufacture a large-sized oxide superconducting coil with a multilayer structure Was difficult.

[0007]

In order to solve the above-mentioned problems in the prior art, obtain a large-sized oxide superconducting coil having a multilayer structure, which is inexpensive, simple in structure, and easy to handle, it is necessary to laminate unit coils. The manufacturing structure of the group and the terminal joining structure between the coils are important. In particular, since the oxide superconducting wire becomes a ceramic state when subjected to heat treatment, it is not possible to apply unreasonable conductor deformation stress to the wire by applying mechanical stress or positioning the joint. Also, if the joining member is 800
It is required to be able to withstand a high temperature of at least ℃ or more, not to short-circuit the superconducting wire due to the molten material in the sintering process, or to have a simple manufacturing structure and joining structure, and to be easily disassembled and joined after heat treatment.

An object of the present invention is to provide a highly reliable multi-layer oxide superconducting coil.

[0009]

A feature of the present invention to achieve the above object is that an oxide superconducting coil has a plurality of unit coil groups wound with an oxide superconducting wire,
The unit coil group has a winding frame, and the end of the oxide superconducting wire is connected to the terminal on the insulating protrusion of the winding frame. Also, one end of the oxide superconducting wire is connected to the positive terminal and the other end of the oxide superconducting wire is connected to the negative terminal at different positions on the insulating protrusion of the winding frame. Also, terminals of the same polarity are connected to each other by a very low resistance conductive material between the plurality of unit coil groups.
In addition, it has a plurality of unit coil groups wound with an oxide superconducting wire, the unit coil group has a winding frame having a notch, and an end of the oxide superconducting wire passes through the notch. Is connected to the terminal on the outer periphery of the bobbin. Also, an upper coil is provided on the upper surface of the winding frame, and a lower coil is provided on the lower surface of the winding frame,
The upper coil and the lower coil are connected via a hole provided in the winding frame. Further, the plurality of unit coil groups are stacked and fixed by a pair of fixed end plates, and a positioning groove provided on the winding frame and a positioning member are provided between the winding frames.

[0010] The present invention specifically solves the problem of applying mechanical stress to a heat-treated oxide superconducting wire terminal portion and applying excessive bending stress, and facilitates lamination joining to reduce damage in a coil group. It is an object of the present invention to provide a laminated joining structure of a large oxide superconducting coil in which a coil group can be extracted and replaced.

A feature of the present invention is that, in a laminated bonding structure of an oxide superconducting coil, a unit coil group and another unit coil group laminated on the unit coil group are formed by a winding start terminal and a winding end terminal, that is, a positive terminal and a negative terminal. A double pancake wound coil group having an upper coil and a lower coil so that both terminals are located on the outer periphery of the wound coil. Then, the positive terminal and the negative terminal of the wound oxide superconducting wire are fixed by providing a terminal plate on the outer peripheral portion of the insulating protrusion between the upper coil and the lower coil forming the winding frame. Pulling out and fixing wire terminals to the terminal board is fixed in the unit coil group before the final winding wires cross each other, and in other unit coil groups, the wire terminals are fixed after the winding wires cross each other doing.

The single unit coil group and the other unit coil group manufactured as described above are heat-treated to form a unit coil group and another unit coil group of the oxide superconducting conductor, and the unit coil group and the other unit coil group are alternated. Are laminated. The relationship between the junction terminals of the unit coil group and the other unit coil group is that the positive terminal which is the terminal of the lower coil of the other unit coil group is located on the negative terminal which is the terminal of the upper coil of the unit coil group, and the other unit coil A semicircular groove is arranged on the cylindrical end surface of the winding frame so that the positive terminal of the next unit coil group to be laminated is located on the negative terminal serving as the terminal of the upper coil of the group, and the positioning is performed. Are joined by a joining flat plate made of an extremely low resistance conductive material.

[0013] Further, in the laminated joining structure of the oxide superconducting coil of the present invention, the positive terminal and the negative terminal of the upper coil and the lower coil of the other unit coil group to be laminated with the unit coil group are fixed by winding the oxide superconducting wire. On the outer periphery of the insulating protrusion between the upper coil and the lower coil to be wired, another insulated winding core with projections provided with another step is formed, and on the outer periphery, the terminal of the winding wire and the unit coil group are laminated. A terminal fixing body provided with a wire terminal plate for fixing a joining flat plate for joining between other unit coil groups is provided, and the wire pull-out fixing of the upper coil and the lower coil to the wire terminal plate of the terminal fixing body is performed in the unit coil group. In this case, the final winding wires of the upper coil and the lower coil are drawn out before being alternated with each other, disposed on a wire terminal plate, and fixed from the outer periphery to the terminal fixing body integrally with a tape insulating band. In the case of other unit coil groups to be stacked on the unit coil group, after the final winding wires of the upper coil and the lower coil cross each other, they are pulled out and arranged on the wire terminal plate, and the outer periphery is integrated with the terminal fixing body. The tape is wound around with a tape insulation band, and the end of the tape insulation band is fixed with a fastener. Then, after fixing the terminal of the winding wire to the wire terminal plate of the terminal fixing body, heat treatment is performed, and another unit coil group to be laminated with the unit coil group is manufactured separately as in the first embodiment. It is characterized in that the groups and the other unit coil groups are alternately laminated, and the coil groups are joined with a joining flat plate made of a very low resistance conductive material. For the winding frame around which the oxide superconducting wire is wound and the terminal fixing body for fixing the wire terminal plate, a stainless steel material having an easily formed oxide film and a large electric resistance value, or an alloy thereof is preferable.

A wire terminal plate for fixing the wound wire terminals of the wound unit coil group and the other unit coil group, and a joining flat plate for joining the wire terminal plates between the unit coil group and the other unit coil group. A conductive material having an electric resistance value of around several tens of nΩ · m at 0 ° C. (also referred to as an extremely low-resistance conductive material), for example, a silver material or a copper material is suitable, and is used for bonding between a wire terminal plate and a coil group. In consideration of improving the adhesion to the flat surface, it is preferable to interpose an indium material. In addition, for the tape insulating band for fixing the wound wire terminal and the wire terminal plate to the terminal fixing body, a tape having a large electric resistance value that is easy to handle and easy to fabricate an insulating layer is suitable. Materials are preferred.

The winding frame is provided with a fixing recess on the outer periphery of the insulating convex portion, and a terminal plate for fixing a joining flat plate for joining between the wound wire terminal and the coil group, or an outer peripheral portion of the insulating convex portion. A terminal fixing with a wire terminal plate of a fixed flat plate for joining a wire terminal and a coil group around the outer periphery of the insulating uneven core with projection provided with another stepped portion on the outer periphery of the insulating core with projection. It is a winding frame with a body. And, in the unit coil group, fix the wire terminal terminal to the wire terminal plate or the terminal plate before the final winding wires cross each other,
The other unit coil groups stacked on the unit coil group are fixed after the final winding wires cross each other. Then, the produced unit coil group and the other unit coil group are heat-treated to produce the unit coil group and the other unit coil group as the oxide superconductor, and the heat-treated unit coil group and the other unit coil group are alternately laminated. doing. Then, the terminals of the unit coil group and the other unit coil groups are joined by an extremely low resistance conductive material.

[0016] In the laminated joint structure configured as described above, since the unit coil group and the other unit coil group are separately heat-treated and joined, any variation or phenomenon in the laminated superconducting oxide superconducting coil is caused. Alternatively, if the coil is damaged by an impact, the countermeasure can be taken promptly, that is, the damaged coil group can be extracted and replaced.

The connection between the terminals of the coil group or the connection of the power supply terminals to the unit coil group may be performed through an L-shaped terminal plate fixed to an insulating projection forming the winding frame or a terminal fixing body, or a wire terminal plate. Therefore, no undue bending stress or deformation stress is applied directly to the wire terminal of the oxide superconducting wire, so that workability can be improved.

Further, since the unit coil group and the other unit coil groups are laminated and joined as a single coil group that has been subjected to heat treatment, the characteristics of the single coil group can be evaluated. This makes it easy to manufacture a large-sized oxide superconducting coil having a multilayer structure with high accuracy and high reliability.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view of an oxide superconducting coil showing a first embodiment of the present invention. FIG. 2 is an external perspective view of a bobbin of a coil group constituting the oxide superconducting coil of the present invention. FIG. 3 is an external perspective view of a unit coil group constituting the oxide superconducting coil of the present invention. FIG. 4 shows an external perspective view of another unit coil group to be laminated, which constitutes the oxide superconducting coil.

Referring to FIGS. 1 to 4, an oxide superconducting coil 1 having a multilayer structure is provided with a flange-shaped insulating convex portion 2 at the center of a cylinder, and an uneven core having an upper step portion 3a and a lower step portion 4a. The uneven core is covered with an oxide film to form an insulating uneven core 5 as a winding frame, and the upper coil 3a and the lower coil 7a are provided on the upper step 3a and the lower step 4a which sandwich the insulating protrusion 2. After fixing the terminals of the oxide superconducting wire 8, heat treatment is applied to one unit coil group 9 a and another unit coil group 1.
0a is manufactured. The unit coil group 9a and the other unit coil group 10a are alternately arranged, the fixed end plate 11a is arranged at the lowermost stage, the insulating end plate 12a is placed, the unit coil group 9a is placed thereon, and the intermediate insulating plate 13a is placed. Interposed, another unit coil group 10a is disposed thereon, and the intermediate insulating plate 13b is disposed again, and another unit coil group 9a is placed thereon,
The insulating end plate 12b and the fixed end plate 11b are superimposed thereon, and finally a plurality of fixing bolts 14 are interposed between the fixed end plate 11a and the fixed end plate 11b. It has a tightening configuration.

The other unit coil group 10 laminated with the unit coil group 9a of the oxide superconducting coil 1 configured as described above.
The winding structure of the unit coil group 9a and the other unit coil group 1
0a, and further facilitates the connection with a power supply terminal for supplying power from the outside.
And the end of the upper coil 6a,
The winding start terminal of the unit coil group 9a is connected to the positive terminal 17a.
The winding end terminal is a negative terminal 18a, and the positive terminal 17a
The negative terminal 18a and the negative terminal 18a are both wound around a double pancake coil.

The upper coil 6a and the lower coil 7a are
A through hole 19 communicating with the upper step portion 3a and the lower step portion 4a is provided below the insulating protrusion 2 of the insulating uneven core 5, and the oxide superconducting wire 8 is wound through the through hole 19. And
The positive terminal 17a and the negative terminal 18a of the oxide superconducting wire 8 located at the outer periphery of the coil are
Fixing recess 2 having screw holes 20a, 20b on the outer periphery of
1a and 21b, and an insulating layer 22 coated with a high-temperature insulating material, for example, Aron ceramics material, is interposed in the terminal fixing recesses 21a and 21b.
a, 23b are temporarily fixed with screws 25a via insulating washers 24, and the terminals of the flexible oxide superconducting wire 8 are disposed on the L-shaped terminal plates 23a, 23b. Screws 25a integrated with the mold terminal plates 23a and 23b
Is fixed firmly. Then, the L-shaped terminal plates 23a, 23
In the unit coil group 9a, the positive terminal 17a and the negative terminal 18a of the oxide superconducting wire 8 wound around b are pulled out and fixed before the final winding wire 27 of the coil intersects. The other unit coil group 10a to be stacked is fixed after being pulled out after the final winding wires 27 cross each other.
That is, the positive terminal 17a and the negative terminal 18 of the oxide superconducting wire 8
The unit coil group 9a and the other unit coil group 1a as the oxide superconductor are manufactured by performing heat treatment on the unit coil group 9a and the other unit coil group 10a having different drawing positions of a.
A unit coil group 9a as an oxide superconductor and another unit coil group 10a are formed by performing heat treatment on the substrate coil 0a.

Then, the heat-treated unit coil group 9a and the other unit coil group 10a are alternately arranged, that is, the unit coil group 9a is arranged at the lowest stage, the other unit coil group 10a is laminated thereon, and another One unit coil group 9a is stacked. Then, the lower coil 7a of the lowermost unit coil group 9a
A positive power supply terminal 28 from an external power supply is bonded to the L-type terminal plate 23a to which the positive terminal 17a is fixed, and negative power is supplied to the upper negative L-type terminal portion 29 to which the negative terminal of the upper unit coil group 9a is fixed. The terminal 30 is bonded and fixed.

The L-type terminal plate 23b of the negative terminal 18a of the intermediate unit coil group 9a and the other unit coil group 10a
Between the L-shaped terminal 23c fixed to the positive terminal 17b, and the L-type terminal plate 23d fixed to the negative terminal 18b of the other unit coil group 10a and the upper positive L-shaped terminal portion 32 fixed to the positive terminal of the unit coil group 9a. Between the coil groups, connecting flat plates 32a and 32b made of an extremely low-resistance conductive material, for example, silver, etc., are arranged.
The electrical resistance at 0 ° C. is in the vicinity of several tens of nΩ · m between the surfaces b and 23c and the joining flat plate 32a, and between the L-shaped terminal plate 23d and the upper positive L-shaped terminal portion 31 and the joining flat plate 32b. The joining flat plates 32a and 32b are fastened with fixing screws 33 with the flexible conductive material interposed therebetween, and the unit coil group 9a and the other unit coil group 10a are detachably joined and fixed.

Further, regarding positioning of the unit coil group 9a and the other unit coil group 10a to be laminated with respect to the joint between the coil groups, the semi-circular groove 35
Are positioned in the semicircular arc groove 35 with the mandrel 36 interposed therebetween. Then, the fixed end plate 11a and the fixed end plate 11b are fastened and fixed by interposing the insulating end plate 12a on the fixed end plate 11a, on which the unit coil group 9a and the intermediate insulating plate 13
The other unit coil group 10a is disposed through the intermediary a, the unit coil group 9a is stacked with the intermediate insulating plate 13b interposed, and the insulating end plate 12b and the fixed end plate 11b are stacked thereon in this order. With the coil group terminals open, fix the entire bolt 14
After fixing the fixing bolts 14 with the nuts 16 and laminating, the coil groups are joined with the joining flat plates 32a and 32b.

An L-shaped terminal plate 23a fixed to the positive terminal 17a of the unit coil group 9a, and an upper stage negative L
A positive power supply terminal 28 and a negative power supply terminal 30 from an external power supply joined to the mold terminal portion 29 are fixed to the L-shaped terminal plate 23a or the upper-stage negative L-shaped terminal portion 29 with screws 25b. Fixed recess 3 having insulating layer 22 on the outer periphery of 11b
7 are inserted into the fixing recess 37 and fixed firmly by the fixing plate 38. As described above, according to the laminated joining structure shown in the present embodiment, the laminating and assembling work of the unit coil group 9a forming the oxide superconducting coil 1 and the other unit coil group 10a laminated becomes easy. Further, when the unit coil group 9a or the other unit coil group 10a in the stack is damaged due to some phenomenon or influence on the formed oxide superconducting coil 1, the damaged oxide superconducting coil 1 is disassembled and only the damaged coil group is disassembled. Can be replaced.

That is, in the unit coil group 9a, the positive terminal 17a of the lower coil 7a and the negative terminal 18a of the upper coil 6a are connected to the oxide superconducting wires 8 of the other unit coil group 10a to be laminated on the unit coil group 9a. In the other unit coil group 10a, the positive terminal 17b of the lower coil 7a and the upper coil 6a
The negative terminal 18b is provided with terminal fixing concave portions 21a and 21b on the outer periphery of the insulating convex portion 2 of the insulating concave-convex winding core 5, and L-type terminal plates 23a, 23b, 23c,
23d is arranged and fixed, and another unit coil group 10a to be laminated with one unit coil group 9a as a single product is produced, and then subjected to a heat treatment to form a unit coil group 9 of oxide superconductor.
a, other unit coil group 10a is formed. The heat-treated unit coil group 9a and the other unit coil group 10a
Are alternately stacked, and the L-type terminal plate 23 of the upper coil 6a negative terminal 18a serving as the unit coil group 9a serving as an intermediate coil terminal
b and other unit coil group 10a lower coil 7a positive terminal 17b
Between the L-shaped terminal plates 23c and the other unit coil group 10a.
Since the L-type terminal plate 23d of the upper coil 6a negative terminal 18b and the upper-stage positive L-type terminal portion 31 of the lower coil of the upper unit coil group 9a are joined by joining plates 32a and 32b made of a very low resistance conductive material. And disassembly and assembly work can be easily performed.

Further, a plurality of semicircular grooves 35 are provided on the cylindrical end face 34 of the insulating uneven core 5 on which the oxide superconducting wire 8 is wound, and the semicircular grooves 35 are laminated with a mandrel 36 interposed therebetween. Accordingly, it is possible to reduce and prevent the position fluctuation of the joint terminal due to replacement of the damaged coil group. In addition, since the coil replacement operation can be easily performed, the oxide superconducting coil 1 can be remanufactured without lowering the electrical characteristics due to the replacement of the damaged coil group and without damaging other coil groups.

Further, since the unit coil group 9a and the other unit coil group 10a constituting the oxide superconducting coil 1 are separately manufactured and the heat-treated coil groups are laminated, it is possible to evaluate a single product before laminating and joining. Accordingly, a large oxide superconducting coil having high reliability can be manufactured.

As described above, in the laminated joint structure of the first embodiment, the positive terminals 17a and 17b and the negative terminals 18a and 18a of the oxide superconducting wire 8 for winding the unit coil group 9a and the other unit coil group 10a are respectively wound. 18b are connected to the L-shaped terminal plates 23a, 23b, 23c, 23d
The unit coil group 9a and the other unit coil group 10a, which were heat treated and prepared, were laminated.
A ring-shaped terminal fixed body provided with another protruding portion on the outer periphery of the insulating convex portion 2 and a wire terminal plate for fixing a wire terminal of the oxide superconducting wire 8 is provided on the protruding portion. A wire terminal is arranged on a wire terminal plate, and the wire terminal and the terminal fixed body are integrally wound and fixed with an insulating band. The heat-treated unit coil group and other unit coil groups are laminated and joined. I do. Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is an external perspective view of an oxide superconducting coil according to a second embodiment of the present invention. FIG. 6 is an external perspective view of a partly broken reel of the unit coil group of the second embodiment. In FIG.
FIG. 3 is an external perspective view of a terminal fixing body of another unit coil group stacked on the unit coil group. FIG. 8 is an external perspective view of a unit coil group according to the second embodiment. FIG. 9 is an external perspective view of another unit coil group of the second embodiment.

In the second embodiment shown in FIGS. 5 to 9, the bobbin on which the oxide superconducting wire 8 is wound is formed by insulating the uneven core 5 forming the bobbin 39 a of the first embodiment. On the outer periphery of the convex portion 2, there is provided an insulated concave / convex winding core 41 having another protruding portion 40 provided thereon. A wire terminal plate 44a for fixing the wire terminal 43 of the wound oxide superconducting wire 8,
Ring-shaped terminal fixing body 4 provided with 44b, 44c, 44d
The winding frame 39b is provided with 5a and 45b. Then, the upper stepped portion 3 of the insulated concave / convex winding core 41 with projections of the winding frame 39b.
b, upper coil 6b and lower coil 7 wound around lower step 4b
The wire terminal 43b is temporarily fixed in a wound state to the surface of the oxide superconducting wire 8 temporarily, and a terminal fixing body 45a or 45b is provided on the protrusion 40 thereat.
A plurality of screw holes 47a, 47b, or 47c, 47d are provided adjacent to the cut portions 46a or 46b provided so that the a and 45b can be easily inserted into the protrusions 40, and are provided in the screw holes 47a and 47b, or A flat metal fitting 48 is interposed between the screw holes 47c and 47d, and a fixing bolt 49 is attached to the flat metal fitting 48.
Is inserted and tightened, and is firmly fixed to the insulated uneven concave and convex core 41. The wire fixing step portions 50a and 50b are provided on the terminal fixing body 45a or 45b fixed to the protruding portion 40 of the insulated concavo-convex winding core 41 with protrusions.
The terminal board mounting grooves 51a and 51b and wire rod outlets 52a and 52b are provided in the terminals a and 50b.

Then, the oxide superconducting wire 8 is wound around the insulated concavo-convex winding core 41 with projections, and the temporarily fixed wire terminal 43 is disassembled to remove the wire outlets 52a, 52b or the cut portion 4.
The wire terminal 43 is pulled out from 6a or 46b to the wire fixing step portions 50a and 50b on the outer periphery of the terminal fixing bodies 45a and 45b, and the drawn wire terminal 43 is connected to the wire terminal plates 44a and 44b or 44c and 44d of the terminal plate mounting grooves 51a and 51b. Through the terminal step surfaces 53a, 53b or 53c, 53d of the oxide superconducting wire 8 to connect the wire terminal 43 of the oxide superconducting wire 8 to the terminal fixing body 45a or 4b.
5b, the entire circumference is wound around an insulating tape insulating band 54 insulated with an oxide film, and the ends are fixed with fasteners 55 to form a group of flexible oxide superconducting coils before the heat treatment. . Then, the wire terminals 43 of the upper coil 6b and the lower coil 7b are pulled out and fixed to the wire terminal plates 44a, 44b or 44c, 44d provided on the terminal fixing bodies 45a, 45b in the same manner as in the first embodiment. The final winding wire 56 of the upper coil 6b and the lower coil 7b wound around the outer periphery is
Before the wires intersect, the wires are drawn out from the outlets 52a, 52b and fixed to the wire terminal plates 44a, 44b as a unit coil group 9b of the second embodiment. After the final winding wires 56 cross each other, cutting is performed. The inclined surface 57 of the portion 46b
a, 57b, and wire fixing step portions 50c, 50
The other unit coil group 10b is formed by laminating the coil groups fixed to the wire terminal plates 44c and 44d.

The unit coil group 9b and the other unit coil group 10b wound with the flexible oxide superconducting wire 8 formed as described above are heat-treated and laminated with the unit coil group 9b as an oxide superconductor. The other unit coil group 10b is manufactured, and the fixed end plate 11c is arranged at the lowermost part.
2c, the unit coil group 9b is disposed thereon, and the other unit coil group 10b is disposed via the intermediate insulating plate 13c, and the unit coil group 9b is disposed thereon via the intermediate insulating plate 13d.
b, and an insulating end plate and a fixed end plate 11d are disposed thereon. The fixed end plate 11c and the fixed end plate 11d are fastened with a plurality of fixing bolts 14.

The winding start terminal of the lower coil 7b of the lowermost unit coil group 9b, ie, the wire terminal plate 44a serving as a positive terminal, and the unit coil group 9b stacked on the uppermost unit are constructed as described above. End terminal of winding, that is, upper negative terminal 5
A power supply terminal 60 for supplying current from an external power supply 59 is provided at 8.
a and 60b are joined. The terminals of the intermediate coil group include, for example, a wire terminal plate 44b serving as a negative terminal of the lower unit coil group 9b and the laminated other unit coil group 1
0b between positive terminal wire terminal plate 44d, other unit coil group 1
Bonding of a very low-resistance conductive material having an electric resistance value of about several tens nΩ · m at 0 ° C. between the wire terminal plate 44c of the negative terminal 0b and the upper positive terminal 61 of the unit coil group 9b laminated on the upper part. The joining flat plates 32c, 32d are interposed with the flat plates 32c, 32d.
d denotes wire terminal plates 44a, 44b, 44c, 44, respectively.
The screw 25c is inserted into the screw hole 47e of d, and is joined and fixed with good adhesion.

As described above, the winding cores of the upper coil 6b and the lower coil 7b forming the unit coil group 10b to be laminated with the unit coil group 9b are the insulated uneven concave and convex cores 41 with the projections. A bonding flat plate 32 for connecting the terminal of the oxide superconducting wire 8 to be wound and the coil group around the outer periphery of 41
c, 32d and a power supply terminal 60a from an external power source 59,
60b for connecting wire terminal plates 44a, 44b, 44c,
Terminal fixing bodies 45a and 45b having 44d and the like are provided. Wire outlets 52a, 5 as cutouts of winding frame
2b or inclined surfaces 57a, 5 of cutting portions 46a, 46b
7b, the wire terminal plates 44a, 44b,
The wire rod terminal 43 on the wire rods 44c and 44d is
0a, 50b, 50c, 50d, the wire terminal plate 44
a, 44b, 44c, 44d and terminal fixing bodies 45a, 45
b and is firmly surrounded and fixed by a tape insulating band 54.
Thereby, even if it joins after performing a heat treatment, a mechanical stress is not directly applied to the wire terminal 43 of the oxide superconducting wire 8, but joining can be facilitated. Further, since the entire terminal portion of the wound oxide superconducting wire 8 is surrounded and fixed from the back, the wire terminal 43 and the wire terminal plates 44a, 44b, 44 are provided.
It has good adhesion to c and 44d, and can maintain and improve the superconducting characteristics. The wire terminal 43 and the wire terminal plate 4
4a, 44b, 44c, 44d and terminal fixing body 45
a, 45b wire fixing step 50a, 50b or 5
Since the surfaces 0c and 50d are evenly and loosely fixed, the application of mechanical stress concentrated on the wire terminal 43 is suppressed. Since the outer peripheral surface of the wound oxide superconducting wire 8 is protected by the wire fixing step portions 50a and 50b of the terminal fixing bodies 45a and 45b and the tape insulating band 54,
Contact damage can be eliminated without directly touching the wire surface, and the damaged coil group can be removed and replaced, and a large-sized superconducting superconducting coil with a reliable multilayer structure that can be reused can be obtained. .

As described above, the other unit coil group laminated with the unit coil group constituting the oxide superconducting coil is replaced with the winding core for winding the oxide superconducting wire by the insulating unevenness having the upper step part and the lower step part. Produce an insulated indented winding core having another protruding portion on the outer periphery of the winding core or the protruding portion of the asperity winding core, and provide a terminal fixing portion on the outer periphery of the insulated protruding portion of the insulated asperity winding core. An L-shaped terminal plate for fixing the joining terminal of the above and the winding wire terminal of the upper coil and the lower coil, or a wire terminal plate for fixing the joining terminal between the winding wire terminal and the coil group on the outer periphery of the insulated uneven core having projections. A terminal fixed body provided with a coil is fixed, and the winding wire terminals of the upper coil and the lower coil of the coil group are fixed to the winding core, and a unit coil group of the heat-treated oxide superconductor and another unit coil group are formed. Single unit coil group and other unit coil group manufactured by heat treatment Because if can exchange repair damaged coils of the unit coil groups or other unit coils in the stack. By doing so, the structure is simple, easy to handle and easy to work, and production costs can be reduced.
It is possible to evaluate the characteristics of a single product before lamination bonding, and to manufacture a large oxide superconducting coil with high reliability and high magnetic field generation.

The coils disclosed in the above embodiments are, for example, as follows.

1. In an oxide superconducting coil composed of a plurality of unit coil groups wound with a metal-coated oxide superconducting wire, an oxide superconducting wire terminal of a coil group to be laminated is formed by a bobbin for winding the oxide superconducting wire. An oxide superconducting coil characterized in that a coil group fixed to the inter-coil insulating projections and heat-treated is laminated and joined.

2. In an oxide superconducting coil composed of a plurality of unit coil groups wound with a metal-coated oxide superconducting wire, an oxide superconducting wire terminal of a coil group to be laminated is formed by a bobbin for winding the oxide superconducting wire. An oxide superconducting coil characterized in that a terminal fixing body is provided and fixed on the outer periphery of the inter-coil insulating convex portion, and the heat-treated coil group is laminated and joined.

3. In an oxide superconducting coil composed of a plurality of unit coils wound with an oxide superconducting wire coated with metal, a wire fixing terminal plate of the wound oxide superconducting wire is wound with an oxide superconducting wire. A concave portion is provided in the inter-coil insulating convex portion of the winding frame to be disposed and fixed, and a heat-treated unit coil group and another unit coil group are produced, and the space between the unit coil group and the other unit coil group is made of an extremely low-resistance conductive material. An oxide superconducting coil characterized by being joined.

4. In an oxide superconducting coil wound from an oxide superconducting wire and composed of a plurality of unit coil groups, a unit coil group, a unit coil group having an upper coil and a lower coil, and another unit coil group are produced, An oxide superconducting coil, wherein heat-treated unit coil groups and other unit coil groups are alternately stacked.

5. In an oxide superconducting coil composed of a unit coil group wound with a metal-coated oxide superconducting wire and another unit coil group to be laminated, another unit coil group to be laminated with the unit coil group forms a coil group. The unit coil group and the other unit coil groups with different positions for pulling out and fixing the winding wire terminals of the upper coil and the lower coil were produced, and the heat treated unit coil group and the other unit coil group were alternately laminated. Oxide superconducting coil.

6. In an oxide superconducting coil composed of a unit coil group wound with an oxide superconducting wire coated with metal and another unit coil group to be laminated, the unit coil group and the other unit coil group had an upper coil and a lower coil. The coil group, the terminal fixing of the upper coil and the lower coil of the wound oxide superconducting wire, the unit coil group that was pulled out and fixed before the final winding wire crossed, and the drawing and fixing after the final winding wire crossed A unit coil group is manufactured, and the heat-treated unit coil group and the other unit coil group are alternately laminated, and the electric resistance value at 0 ° C. is close to several tens of nΩ · m between the unit coil group and the other unit coil group. An oxide superconducting coil characterized by being joined with an extremely low resistance conductive material.

7. In an oxide superconducting coil composed of a unit coil group and another unit coil group laminated on the unit coil group, a terminal plate for fixing a winding wire terminal of the other unit coil group laminated on the unit coil group, and a unit coil group The same terminal plate is used as the joining terminal plate for joining the other unit coil groups to be laminated, and the terminal plate is directly connected to the inter-coil insulating convex portion of the winding frame for winding the oxide superconducting wire via an insulating layer, or An oxide superconducting coil characterized in that a unit coil group provided via a fixing body for fixing a plate and another unit coil group are produced, heat-treated and laminated.

8. In a unit coil group and an oxide superconducting coil configured by stacking another unit coil group on the unit coil group, the terminal fixing of the winding wire of the other unit coil group to be stacked with the unit coil group is performed by using the oxide superconducting wire. On the outer peripheral portion of the inter-coil insulating convex portion of the winding frame to be wound, a fixed body having a terminal plate mounting groove and a fixed step portion is provided, and an extremely low resistance conductive material is provided in the terminal plate mounting groove of the fixed body. A terminal plate is provided, and a unit coil group in which the winding wire terminal and the terminal plate are fixed integrally with the fixed body, and another unit coil group are produced, and the unit coil group after heat treatment and the other unit coil group are alternately laminated. An oxide superconducting coil characterized in that the terminals of the coil group are joined by a fixed body.

9. In a unit coil and an oxide superconducting coil formed by stacking another unit coil group on a unit coil group,
A ring-shaped terminal fixing plate is provided on the outer periphery of the inter-coil insulating protrusion of the winding frame for winding the oxide superconducting wire, and the terminal fixing body is extremely low. A terminal plate made of a resistive conductive material is provided to fix the winding wire rod terminals, a unit coil group and other unit coil groups are produced, and the heat-treated unit coil group and other unit coil group can be arbitrarily attached and detached. An oxide superconducting coil characterized by being laminated.

10. In a unit coil group and an oxide superconducting coil formed by laminating and joining another unit coil group to the unit coil group, the unit coil group and the other unit coil group are inter-coil insulating protrusions of a bobbin for winding the oxide superconducting wire. On the outer periphery of the part,
A terminal fixing body with a terminal plate of extremely low resistance conductive material is provided, and the terminal fixing body is pulled out and fixed before the final winding wire of the upper coil and the lower coil of the oxide superconducting wire intersect on the terminal plate of the terminal fixing body A unit coil group that was pulled out and fixed after crossing the final winding wire rod was manufactured, and the unit coil group and the other unit coil group that were subjected to heat treatment were alternately laminated, and the joining between coil terminals was extremely low resistance. An oxide superconducting coil characterized by being joined by a conductive material.

11. In an oxide superconducting coil configured by laminating a plurality of unit coil groups, a coil terminal of a wound oxide superconducting wire is wound around the outer periphery of the inter-coil insulating protrusion of a winding frame forming the unit coil group. A unit coil group in which a terminal fixed body having a fixed step portion to be fixed is provided, an oxide superconducting wire is wound several times around the fixed step portion, and the outer periphery is wound and fixed with a non-magnetic metal material insulated and covered, and the like. An oxide superconducting coil, wherein a unit coil group is manufactured, and a heat-treated unit coil group and another unit coil group are laminated and joined.

12. In an oxide superconducting coil configured by stacking a unit coil group and another unit coil group on the unit coil group, the winding coil end faces of the upper coil and the lower coil forming the unit coil group and the other unit coil group are oxidized. The unit coil group wound low and the other unit coil group were fabricated and laminated and joined to the cylindrical end surface which is the inner core of the insulating irregularity winding core of the winding frame for winding the superconducting wire. Oxide superconducting coil.

[0050]

According to the present invention, a highly reliable oxide superconducting coil having a multilayer structure can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a partially broken appearance of an oxide superconducting coil according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing a bobbin of a coil group of the oxide superconducting coil according to the embodiment of the present invention.

FIG. 3 is a coil external perspective view showing a unit coil group constituting the oxide superconducting coil according to the embodiment of the present invention.

FIG. 4 is an external perspective view of a coil showing another unit coil group constituting the oxide superconducting coil according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a partially broken appearance of an oxide superconducting coil according to a second embodiment of the present invention.

FIG. 6 is a partially broken external perspective view of a bobbin of a unit coil group constituting an oxide superconducting coil according to a second embodiment of the present invention.

FIG. 7 is an external perspective view showing a bobbin of another unit coil group laminated on the unit coil group according to the second embodiment of the present invention.

FIG. 8 is an external perspective view showing a unit coil group constituting an oxide superconducting coil according to a second embodiment of the present invention.

FIG. 9 is an external perspective view showing another unit coil group constituting the oxide superconducting coil according to the second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Oxide superconducting coil, 2 ... Insulating convex part, 3a, 3b ...
Upper step, 4a, 4b: Lower step, 5: Insulating uneven core
6a, 6b: upper coil, 7a, 7b: lower coil, 8: oxide superconducting wire, 9a, 9b: unit coil group, 10a,
10b: Other unit coil group, 11a, 11b, 11c, 1
1d: fixed end plate, 12a, 12b, 12c: insulating end plate, 1
3a, 13b, 13c, 13d: Intermediate insulating plate, 14, 4
9: fixing bolt, 15: washer, 16: nut, 17
a, 17b, 17c, 17d: positive terminal, 18a, 18
b, 18c: negative terminal, 19: through hole, 20a, 20b, 4
7a, 47b, 47c, 47d, 47e: screw holes, 21
a, 21b: terminal fixing recess, 22: insulating layer, 23a, 2
3b, 23c, 23d: L-shaped terminal plate, 24: insulating washer, 25a, 25b, 25c: screw, 26: fixed flat plate,
27 ... final winding wire rod, 28 ... positive power supply terminal, 29 ... upper negative L-shaped terminal part, 30 ... negative power supply terminal, 31 ... upper positive L-shaped terminal part, 32a, 32b, 32c, 32d ... joining flat plate, 33
... fixing screw, 34 ... cylindrical end face, 35 ... semicircular groove, 36 ...
Mandrel, 37: fixed recess, 38: fixed plate, 39a, 39b
... winding frame, 40 ... projection, 41 ... insulating uneven core with projection, 4
2: inner ring groove, 43: wire terminal, 44a, 44b, 44
c, 44d: wire terminal plate, 45a, 45b: terminal fixed body, 46a, 46b: cut portion, 48: flat metal plate, 50
a, 50b, 50c, 50d ... wire fixing step portion, 51
a, 51b: terminal board disposition groove, 52a, 52b: wire outlet, 53a, 53b, 53c, 53d: terminal step surface, 54: tape insulating band, 55: stopper, 56: final winding wire, 57a, 57b: inclined surface, 58: upper negative terminal,
59: external power supply, 60a, 60b: power supply terminal, 61: upper stage positive terminal.

Claims (6)

[Claims] 1. A unit coil group having a plurality of unit coils wound with an oxide superconducting wire, the unit coil group having a bobbin, and an end of the oxide superconducting wire on an insulating protrusion of the bobbin. An oxide superconducting coil connected to a terminal. 2. The method according to claim 1, wherein one end of the oxide superconducting wire is connected to a positive electrode terminal and the other end of the oxide superconducting wire is connected to a negative electrode terminal at different positions on the insulating protrusion of the bobbin. An oxide superconducting coil characterized by the following. 3. The oxide superconducting coil according to claim 2, wherein terminals of the same polarity are connected by an extremely low-resistance conductive material between the plurality of unit coil groups. 4. An oxide superconducting wire having a plurality of unit coil groups wound with an oxide superconducting wire, the unit coil group having a winding frame having a notch, and passing through the notch. An oxide superconducting coil characterized in that an end of the superconducting coil is connected to a terminal on the outer periphery of the bobbin. 5. The winding system according to claim 1, wherein an upper coil is provided on an upper surface of the winding frame, and a lower coil is provided on a lower surface of the winding frame, and the upper coil and the lower coil are connected via a hole provided in the winding frame. An oxide superconducting coil characterized by the above-mentioned. 6. A plurality of unit coil groups are stacked and fixed by a pair of fixed end plates, and a positioning groove provided on the winding frame is provided between the winding frames.
An oxide superconducting coil having a positioning member.