JPH09213520A - Superconducting coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the stability of a noncircular superconducting coil by a method wherein a self-fused wire in which the surface of an insulated and coated superconducting wire is covered in advance with a thermoplastic resin or with an insulating material containing a thermoplastic resin is used as a superconducting wire material and a support is arranged at least either on the outer circumferential side or the inner circumferential side in a part of a superconducting winding. SOLUTION: A self-fused wire 10 in which the surface of a superconducting wire 8 covered with formal 7 is coated with a phenoxy resin 9 is used, it is wound on an aluminum spool via an FRP sheet in which one face on the side of a winding is coated with a phenoxy resin, and a superconducting winding 13 is created. Then, while the superconducting winding 13 is being pressurized in its axial direction, it is heat-treated, and it is formed in an integrated race track shape. The bobbin is removed, two stainless steel supports in which their circumferential face 14 and their side-face side 15 are connected are connected further, and they are attached to the outer circumferential part in the straight line part of the superconducting winding 13. Thereby, a thermal stress between the superconducting winding 13 and the supports is reduced, and the stability of a superconducting coil is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a superconducting winding by winding a superconducting wire in a non-circular shape and in a plurality of layers, and fixing the superconducting winding by a support or a winding frame which also serves as a support. And a superconducting coil having improved stability.

[0002]

2. Description of the Related Art Conventionally, as one of superconducting coils,
BACKGROUND ART A superconducting coil is used in which a superconducting wire is wound into a non-circular shape and is wound into a plurality of layers to form a superconducting winding, and the superconducting winding is fixed by a support or a winding frame that also serves as a support.

FIG. 10 is a schematic view showing a structural example of a superconducting coil having a non-circular shape of this kind. In FIG. 10, a superconducting wire 4 is wound around a bobbin 3 having an inner peripheral side 1 and a side surface 2 to form a superconducting winding 5, and the superconducting winding 5 is integrally molded with the bobbin 3 by impregnation or the like. The winding frame 3 is used as a support, and the superconducting winding 5 is supported.

On the other hand, in order to improve the stability of the racetrack-shaped superconducting coil, as shown in the schematic view of FIG. 11, only the outer peripheral side of the superconducting winding 5 from which the bobbin 3 is removed is used as the support body 6. There is also a method of supporting the superconducting coil by bringing them into contact with each other.

Recently, a superconducting coil having a non-circular shape other than the race track shape is also
It is desired to improve stability. By the way, in the superconducting coil as described above, as one of the causes of impairing its stability, generated by thermal stress due to the difference in thermal contraction rate when cooled to a low temperature, between the superconducting winding and the support, or Examples include peeling of the interface between the superconducting winding and the winding frame, and normal conduction transition (hereinafter referred to as quench) due to cracks due to internal stress generated by electromagnetic force during excitation.

In particular, a superconducting coil having a non-circular shape, for example, a racetrack-shaped coil tends to be deformed into a circular shape by an electromagnetic force, so that stress is locally concentrated,
Cracks occur between superconducting wires, frictional heat is generated due to their relative motion, and peeling from the bobbin and support occurs, resulting in lower stability than axisymmetric coils such as superconducting solenoid coils. There are cases.

[0007]

As described above, the conventional superconducting coil has a problem of low stability. An object of the present invention is to provide a superconducting coil having a non-circular shape that can improve stability.

[0008]

In order to achieve the above object, first, in the invention corresponding to claim 1, a superconducting wire is wound in a non-circular shape in a plurality of layers to form a superconducting winding,
In a superconducting coil formed by fixing the superconducting winding with a support or a winding frame that also serves as a support, the surface of the insulation-coated superconducting wire is previously coated with a thermoplastic resin or an insulating material containing a thermoplastic resin as the superconducting wire. Using the self-bonding wire described above, the support is arranged on at least one of the outer peripheral side and the inner peripheral side of a part of the superconducting winding.

Further, in the invention according to claim 2, in the superconducting coil of the invention according to claim 1, the support disposed on the outer peripheral side or the inner peripheral side of the superconducting winding and the side surface side of the superconducting winding. Is connected to the support placed at.

Further, in the invention according to claim 3, in the superconducting coil of the invention according to claim 1, a plurality of supports are arranged on the outer peripheral side of the superconducting winding, and the spaces between the supports are provided. The superconducting windings are connected by a support arranged on the side surface side.

On the other hand, in the invention according to claim 4, in the superconducting coil of the invention according to claim 1, the superconducting winding and the end portion of the support disposed on the outer peripheral side or the inner peripheral side thereof are Each has a wedge-shaped gap.

Further, in the invention according to claim 5, in the superconducting coil of the invention according to claim 1, the superconducting winding has a racetrack shape, and the support is arranged at least in a straight line of the superconducting winding. The outer peripheral side of the portion and the inner peripheral side of the arc portion of the superconducting winding.

Further, in the invention according to claim 6, in the superconducting coil of the invention according to claim 1, the superconducting winding has a D shape, and the support is arranged at least in a straight line portion of the superconducting winding. On the outer peripheral side and on the outer peripheral side of the arc portion facing the straight line portion.

Further, in the invention according to claim 7, in the superconducting coil of the invention according to claim 1, a material having a low friction coefficient is provided between the outer peripheral surface or the inner peripheral surface of the superconducting winding and the support. I am using.

Further, in the invention corresponding to claim 8, in the superconducting coil of the invention according to claim 1, in which a support is arranged on the inner peripheral side of a part of the superconducting winding, the superconducting winding has a circumferential direction. The thermal contraction of the support on the inner peripheral side of the superconducting winding is made larger than the thermal contraction.

Therefore, first, in the superconducting coil of the invention according to claim 1, as the superconducting wire, the self-bonding wire in which the surface of the insulation-coated superconducting wire is coated with a thermoplastic resin or an insulating material containing a thermoplastic resin. The support is divided by arranging the support on at least one side of the outer circumference side or the inner circumference side of a part of the superconducting winding. As compared with the case where the circumference and the entire side surface are supported, thermal stress generated between the superconducting winding and the support or between the winding frames can be reduced, quenching can be suppressed, and stability can be improved.

Further, in the superconducting coil of the invention according to claim 2, the support arranged on the outer peripheral side or the inner peripheral side of the superconducting winding and the support arranged on the side surface side of the superconducting winding are connected. By doing so, in addition to the action of the superconducting coil of the invention according to claim 1, axial expansion of the superconducting winding due to bending outward or inward due to electromagnetic force is suppressed in the side surface support portion. It is possible to limit the generation of internal stress generated inside the superconducting winding.

Further, in the superconducting coil of the invention according to claim 3, a plurality of supports are arranged on the outer peripheral side of the superconducting winding, and the spaces between the supports are arranged on the side surface side of the superconducting winding. In addition to the action of the superconducting coil of the invention according to claim 2, the deformation of the entire superconducting coil into a circular shape due to the electromagnetic force is suppressed by the connection by the support body, so that the internal stress is generated due to the deformation. Can be suppressed. I do.

On the other hand, in the superconducting coil of the invention according to claim 4, a wedge-shaped gap is provided between the superconducting winding and the end portion of the support disposed on the outer peripheral side or the inner peripheral side thereof. In addition to the action of the superconducting coil of the invention according to claim 1, when a support is deformed into a circular shape by an electromagnetic force, the superconducting winding supports are added to a contacting portion and a non-contacting portion. The discontinuity of the compressive force can be reduced and the stress concentration can be suppressed.

Further, in the superconducting coil of the invention according to claim 5, the superconducting winding has a racetrack shape, and the support is arranged at least on the outer peripheral side of the linear portion of the superconducting winding and in the superconducting winding. By providing the inner peripheral side of the circular arc portion, in addition to the action in the superconducting coil of the invention corresponding to claim 1, the linear portion of the racetrack type superconducting winding is outward by the electromagnetic force during excitation. Moreover, since the arc portion is deformed inward, it is possible to effectively suppress the deformation and suppress the generation of internal stress.

Further, in the superconducting coil of the invention according to claim 6, the superconducting winding has a D-shape, and the support is disposed at least on the outer peripheral side of the straight portion of the superconducting winding and at the straight portion. By adopting the outer peripheral side of the circular arc portion, in addition to the action in the superconducting coil of the invention according to claim 1, the linear portion and the circular arc portion of the D-shaped superconducting winding are formed by the electromagnetic force during excitation. Since it deforms to the outside, it is possible to effectively suppress the deformation and suppress the generation of internal stress.

Further, in the superconducting coil of the invention according to claim 7, by using a material having a low coefficient of friction between the outer peripheral surface or the inner peripheral surface of the superconducting winding and the support, In addition to the action of the superconducting coil of the corresponding invention, it is possible to suppress the generation of frictional heat at the time of deformation into a circular shape by the electromagnetic force during excitation.

Further, in the superconducting coil of the invention according to claim 8, the heat conduction of the support on the inner peripheral side of the superconducting winding is made larger than the heat contraction of the superconducting winding in the circumferential direction. In addition to the function of the superconducting coil of the invention according to claim 1 in which a support is arranged on the inner peripheral side of a part of the winding, the vertical drag generated between the support and the superconducting winding during cooling is It is possible to reduce the frictional heat and suppress the generation of frictional heat.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The superconducting coil of the present invention uses, as a superconducting wire, a self-bonding wire obtained by coating the surface of an insulation-coated superconducting wire with a thermoplastic resin or an insulating material containing a thermoplastic resin in advance, and further cooling. The support, which is arranged so as to effectively suppress the deformation of the superconducting winding at the time of excitation or excitation, is arranged on the outer peripheral side, the inner peripheral side, or both sides of a part of the superconducting winding.

Embodiments of the present invention based on the above concept will be described below in detail with reference to the drawings. (First Embodiment) The superconducting coil according to the present embodiment is shown in FIG.
As shown in Table 1, self-melting in which phenoxy resin (thermoplastic resin or insulating material containing thermoplastic resin) 9 is previously coated on the surface of superconducting wire 8 covered with formal (insulating material) 7 shown in Table 1 below. An FRP in which a phenoxy resin is coated on one side of the winding side of a winding frame 11 made of aluminum having a shape as shown in FIG.
54 × 4 with a tension of 60 to 100 N through the sheet 12
The superconducting winding 13 is wound with 0 turns.

Further, the superconducting winding 13 is arranged in the axial direction 1
While pressurizing at a pressure of ~ 5 MPa, 100-150 degrees Celsius
The temperature is maintained in a constant temperature hot air circulation type constant temperature bath, and heat treatment is performed for 1 to 15 hours, followed by gradual cooling to obtain an integrally molded racetrack-type superconducting superconducting winding 13.

Further, from this superconducting winding 13 to the bobbin 11
Remove the outer peripheral side 14 and the side surface 1 as shown in FIG.
The two stainless steel supports that are connected to 5 are further connected to each other and attached to the outer peripheral portion of the straight portion of the superconducting superconducting winding 13.

Here, the support 1 is cooled and excited.
At the contact ends of the superconducting windings 4 and 15, the superconducting winding 1
Wedge-shaped gaps 16 are provided so that a significant difference in stress does not occur between the supporting portion and the non-supporting portion of No. 3.

[0029]

[Table 1]

Next, in the superconducting coil of the present embodiment configured as described above, as a superconducting wire, a phenoxy resin (thermoplastic resin or a thermoplastic resin is formed on the surface of the superconducting wire 8 coated with formal (insulating material) 7 in advance. Insulation material containing thermoplastic resin 9 Self-bonding wire 10 coated
By disposing the support member 14 on the outer peripheral side of a part of the superconducting winding 13, the supporting portion is divided. As compared with the case where the entire circumference is supported, thermal stress generated between the superconducting winding 13 and the support 14 can be reduced, quenching can be suppressed, and stability can be improved.

Further, by connecting the support body 14 arranged on the outer peripheral side of the superconducting winding 13 and the support body 15 arranged on the side surface side of the superconducting winding 13, the bending to the outside by the electromagnetic force. The axial expansion of the superconducting winding 13 due to
Since it is suppressed in the side surface support portion, it is possible to limit the generation of internal stress generated inside the superconducting winding 13.

Furthermore, since the wedge-shaped gaps 16 are respectively provided in the superconducting winding 13 and the end of the support 14 arranged on the outer peripheral side thereof, the superconducting wire is deformed into a circular shape by electromagnetic force. The stress concentration can be suppressed by reducing the discontinuity of the compressive force applied to the portion of the winding 13 that is in contact with the support 14 and the portion that is not in contact.

FIG. 4 is a diagram showing the comparison of the measurement results of the training characteristics of the superconducting coil of this embodiment and the above-mentioned conventional superconducting coil. For comparison, as a superconducting coil of the conventional example, a superconducting winding is similarly manufactured, and the superconducting coil is supported on the inner circumference side and the entire circumference of the side surface side.

Referring to the change in the quench current value with the increase in the number of excitations in FIG. 4, the value of the quench current of the superconducting coil according to the present embodiment is larger than that of the conventional superconducting coil from the first time. The effect of the superconducting coil of the embodiment can be confirmed.

As described above, in the superconducting coil of this embodiment, the phenoxy resin 9 is previously formed on the surface of the superconducting wire 8 coated with the formal 7 as the superconducting wire.
The self-bonding wire 10 coated with
Are arranged on the outer peripheral side of a part of the superconducting winding 13, so that the support portion is divided.
As compared with the case where the outer circumference of 3, the inner circumference, and the entire circumference of the side surface are supported, thermal stress generated between the superconducting winding 13 and the support 14 is reduced, quenching is suppressed, and stability is improved. It becomes possible to do.

Further, since the support body 14 arranged on the outer peripheral side of the superconducting winding 13 and the support body 15 arranged on the side surface side of the superconducting winding 13 are connected to each other, an outward force due to electromagnetic force is applied. Axial expansion of the superconducting winding 13 due to bending is suppressed at the side surface supporting portion, so that the superconducting winding 1
It is possible to limit the generation of internal stress that occurs inside 3.

Further, since the wedge-shaped gaps 16 are respectively provided in the superconducting winding 13 and the end portions of the support bodies 14 arranged on the outer peripheral side thereof, when they are deformed into a circular shape by electromagnetic force, It is possible to reduce the discontinuity of the compressive force applied to the portion where the support 14 of the superconducting winding 13 is in contact with the portion where the support 14 is not in contact, and to suppress the stress concentration.

(Second Embodiment) As shown in FIG. 1, the superconducting coil of the present embodiment has a phenoxy compound formed on the surface of a superconducting wire 8 coated with formal (insulating material) 7 shown in Table 1 in advance. Using a self-bonding wire 10 coated with a resin (a thermoplastic resin or an insulating material containing a thermoplastic resin) 9, a phenoxy resin is wound on a winding frame 11 made of aluminum having a shape as shown in FIG. 60 to 100N through the FRP sheet 12 coated on one side of
The superconducting winding 13 is manufactured by winding 54 × 40 turns under tension.

Further, the superconducting winding 13 is arranged in the axial direction 1
While pressurizing at a pressure of ~ 5 MPa, 100-150 degrees Celsius
After being carried into a hot air circulation type constant temperature bath maintained at a constant temperature for 15 hours and then gradually cooled, an integrally molded racetrack-type superconducting superconducting winding 13 is obtained.

Further, from this superconducting winding 13 to the bobbin 11
5, the support 17 made of stainless steel is arranged on the outer peripheral side in the straight part of the superconducting winding 13, and in the arc part of the superconducting winding 13, the radius of the superconducting winding 13 is removed. A support 18 made of an aluminum alloy that undergoes heat shrinkage more than the direction is arranged on the inner peripheral side, and the respective supports 17 and 18 are connected.

Next, in the superconducting coil of the present embodiment configured as described above, as a superconducting wire, a phenoxy resin (thermoplastic resin or a thermoplastic resin is formed on the surface of the superconducting wire 8 coated with formal (insulating material) 7 in advance. Insulation material containing thermoplastic resin 9 Self-bonding wire 10 coated
The support 17 and the support 18 by using the superconducting winding 1
Since the supporting portion is divided by arranging it on the outer peripheral side and the inner peripheral side of a part of 3, it is necessary to support the entire outer circumference, the entire inner circumference, or the entire side surface of the superconducting winding 13. In comparison, thermal stress generated between the superconducting winding 13 and the support 14 can be reduced, quenching can be suppressed, and stability can be improved.

Further, the superconducting winding 13 has a racetrack shape, and the support 17 and the supporting body 18 are arranged at the outer peripheral side of the straight portion of the superconducting winding 13 and the superconducting winding 13.
In addition to the above-described action, the racetrack-shaped superconducting winding 13 has its straight portion deformed to the outside and its arc portion deformed to the inside by the electromagnetic force at the time of excitation. Therefore, it is possible to effectively suppress the deformation and suppress the generation of internal stress.

Further, the heat contraction of the support 18 on the inner peripheral side of the superconducting winding 13 is made larger than the heat contraction of the superconducting winding 13 in the circumferential direction. In addition to the action of the superconducting coil having the support disposed on the circumferential side, the vertical drag generated between the support 18 and the superconducting winding 13 during cooling can be reduced to suppress the generation of frictional heat. .

FIG. 6 is a diagram showing comparison of the measurement results of the training characteristics of the superconducting coil of this embodiment and the conventional superconducting coil described above. For comparison, as a superconducting coil of the conventional example, a superconducting winding is similarly manufactured, and the superconducting coil is supported on the inner circumference side and the entire circumference of the side surface side.

Referring to the change in the quench current value with the increase in the number of excitations in FIG. 6, the quench current value of the superconducting coil according to the present embodiment is larger than that of the conventional superconducting coil from the first time. The effect of the superconducting coil of the embodiment can be confirmed.

As described above, in the superconducting coil of the present embodiment, as the superconducting wire, the surface of the superconducting wire 8 coated with the formal 7 is preliminarily coated with the phenoxy resin 9 in advance.
Using the self-bonding wire 10 coated with
Since the support 18 is arranged on the outer peripheral side and the inner peripheral side of a part of the superconducting winding 13, since the supporting portion is divided, the entire outer circumference or the entire inner circumference of the superconducting winding 13 is divided. As compared with the case where the circumference and the entire side surface are supported, it is possible to reduce the thermal stress generated between the superconducting winding 13 and the support body 14, suppress the quench, and improve the stability.

Further, the superconducting winding 13 has a racetrack shape, and the support 17 and the supporting body 18 are arranged at the outer peripheral side of the straight portion of the superconducting winding 13 and the superconducting winding 13.
Since it is located on the inner peripheral side of the arc portion, the racetrack-shaped superconducting winding 13 is generated by the electromagnetic force during excitation.
Since the linear portion is deformed outward and the arc portion is deformed inward, it is possible to effectively suppress the deformation and suppress the occurrence of internal stress.

Furthermore, since the thermal contraction of the support 18 on the inner peripheral side of the superconducting winding 13 is made larger than the thermal contraction of the superconducting winding 13 in the circumferential direction, a part of the superconducting winding 13 is partially contracted. In addition to the action of the superconducting coil having the support disposed on the inner peripheral side, the vertical drag generated between the support 18 and the superconducting winding 13 during cooling can be reduced to suppress the generation of frictional heat. It will be possible.

(Third Embodiment) As shown in FIG. 1, the superconducting coil of the present embodiment has a phenoxy compound formed on the surface of a superconducting wire 8 coated with formal (insulating material) 7 shown in Table 1 in advance. Using a self-bonding wire 10 coated with resin (thermoplastic resin or insulating material containing thermoplastic resin) 9, a D-shaped aluminum reel having a linear length and an inner diameter of 150 mm is provided with a phenoxy resin on one side. 50-100 via coated FRP sheet
The superconducting winding 19 is manufactured by winding 54 × 40 turns with a tension of N.

Further, the superconducting winding 19 is arranged in the axial direction 1
While pressurizing at a pressure of ~ 5 MPa, 100-150 degrees Celsius
The temperature is maintained in a constant temperature hot air circulation type constant temperature bath, and heat treatment is performed for 1 to 15 hours, followed by gradual cooling to obtain an integrally molded D-type superconducting superconducting winding 19.

Further, the winding frame is removed from the superconducting winding 19 and, as shown in FIG.
A support made of stainless steel is placed on the outer peripheral side of 0 and the facing arc portion 21 via a polytetrafluoroethylene sheet.

Next, in the superconducting coil of the present embodiment configured as described above, as a superconducting wire, a phenoxy resin (thermoplastic resin or thermoplastic resin Insulation material containing thermoplastic resin 9 Self-bonding wire 10 coated
By using the support 20 and the support 21 as the superconducting winding 1
Since the support portion is divided by arranging the outer peripheral side and the inner peripheral side of a part of 9, the superconducting winding 19 is supported on the outer peripheral side, the inner peripheral side, and the side peripheral side. In comparison, thermal stress generated between the superconducting winding 19 and the supports 20 and 21 can be reduced, quenching can be suppressed, and stability can be improved.

Further, the superconducting winding 19 has a D shape,
By arranging the support bodies 20 and 21 on the outer peripheral side of the straight line portion of the superconducting winding 19 and on the outer peripheral side of the circular arc portion facing the straight line portion, in addition to the above-mentioned action, D Since the straight portion and the arc portion of the shape-shaped superconducting winding 19 are deformed outward, the deformation can be effectively suppressed, and the generation of internal stress can be suppressed.

FIG. 8 is a diagram showing the results of measuring the training characteristics of the superconducting coil of this embodiment and the conventional superconducting coil described above in comparison. For comparison, as a superconducting coil of the conventional example, a superconducting winding is similarly manufactured and the superconducting coil is supported on the entire outer circumference.

Referring to the change in the quench current value with the increase in the number of excitations in FIG. 8, the quench current value of the superconducting coil according to the present embodiment is larger than the value of the conventional superconducting coil from the first time. The effect of the superconducting coil of the embodiment can be confirmed.

As described above, in the superconducting coil of this embodiment, the phenoxy resin 9 is previously formed on the surface of the superconducting wire 8 coated with the formal 7 as the superconducting wire.
Using a self-bonding wire 10 coated with
Since the support 21 is arranged on the outer peripheral side and the inner peripheral side of a part of the superconducting winding 19, since the supporting portion is divided, the entire outer circumference or the entire inner circumference of the superconducting winding 19 is divided. As compared with the case where the circumference and the entire side surface are supported, it is possible to reduce the thermal stress generated between the superconducting winding 19 and the supports 20 and 21, suppress quenching, and improve stability.

Further, the superconducting winding 19 has a D shape,
Since the positions of the supports 20 and 21 are arranged on the outer peripheral side of the straight part of the superconducting winding 19 and on the outer peripheral side of the arc part facing the straight part, the electromagnetic force during excitation causes D
Since the straight portion and the arc portion of the shape-shaped superconducting winding 19 are deformed outward, it is possible to effectively suppress the deformation and suppress the generation of internal stress.

(Fourth Embodiment) As for the superconducting coil of the present embodiment, as shown in FIG. 9, for the superconducting winding 22 manufactured by the same manufacturing method as in the first embodiment, the support 24 is vacuumed. It is a part of the container 23.

Next, in the superconducting coil of the present embodiment configured as described above, compared with the case where the supporting portion is the entire circumference of the outer peripheral side of the superconducting winding, the first characteristic is the training characteristic.
Similar to the above embodiment, the stability is improved as compared with the conventional superconducting coil.

As described above, also in the superconducting coil of the present embodiment, as in the case of each of the above-described embodiments, compared with the case where the outer circumference of the superconducting winding 19 or the inner circumference and the entire side surface are supported. The superconducting winding 19 and the supports 20, 2
The thermal stress generated during 1 is reduced, quench is suppressed,
It is possible to improve stability.

The present invention is not limited to the above-described embodiments, but can be implemented in the same manner as described below. (A) In each of the above-described embodiments, a plurality of supports are arranged on the outer peripheral side of the superconducting winding, and the supports are connected by the supports arranged on the side surfaces of the superconducting winding. By suppressing the deformation of the entire superconducting coil into a circular shape due to electromagnetic force, suppressing the generation of internal stress due to deformation,
It is possible to improve stability.

(B) In each of the above-described embodiments, by using a material having a low friction coefficient between the outer peripheral surface or the inner peripheral surface of the superconducting winding and the support, a circular shape is formed by the electromagnetic force during excitation. At the time of deformation, it is possible to suppress the generation of frictional heat and improve the stability.

[0063]

As described above, according to the invention according to claim 1, the superconducting wire is wound in a non-circular shape and in a plurality of layers to form a superconducting winding, and the superconducting winding is supported. Alternatively, in a superconducting coil fixed by a winding frame that also serves as a support, as the superconducting wire, a self-bonding wire in which the surface of the insulation-coated superconducting wire is previously coated with a thermoplastic resin or an insulating material containing a thermoplastic resin is used. Since the support is arranged on at least one side of the outer peripheral side or the inner peripheral side of a part of the superconducting winding, between the superconducting winding and the support,
Alternatively, it is possible to provide a superconducting coil capable of reducing the thermal stress generated between the winding frames, suppressing quenching, and improving the stability.

According to a second aspect of the present invention,
In the superconducting coil of the invention according to claim 1,
Since the support arranged on the outer or inner circumference side of the superconducting winding and the support arranged on the side surface side of the superconducting winding are connected to each other, the superconducting winding caused by the bending to the outside or the inside by the electromagnetic force. It is possible to provide a superconducting coil capable of suppressing the expansion of the wire in the axial direction at the side surface supporting portion, limiting the generation of internal stress generated inside the superconducting winding, and improving the stability.

Further, according to the invention corresponding to claim 3, in the superconducting coil of the invention according to claim 1, a plurality of supports are arranged on the outer peripheral side of the superconducting winding, and each of the supports is Since the spaces are connected by the support disposed on the side surface side of the superconducting winding, the deformation of the entire superconducting coil into a circular shape due to the electromagnetic force is suppressed, and the generation of internal stress due to the deformation is suppressed. A superconducting coil capable of improving stability can be provided.

On the other hand, according to the invention corresponding to claim 4,
In the superconducting coil of the invention according to claim 1,
Since a wedge-shaped gap is provided in each of the superconducting winding and the end of the support arranged on the outer peripheral side or the inner peripheral side thereof, when the superconducting winding is deformed into a circular shape by electromagnetic force, It is possible to provide a superconducting coil capable of reducing the discontinuity of the compressive force applied to the portion in contact with the support and the portion not in contact, suppressing the stress concentration, and improving the stability.

According to the invention corresponding to claim 5,
In the superconducting coil of the invention according to claim 1,
The superconducting winding has a racetrack shape, and the support is placed at least on the outer peripheral side of the straight portion of the superconducting winding and on the inner peripheral side of the arc portion of the superconducting winding. It is possible to provide a superconducting coil capable of effectively suppressing the deformation due to, suppressing the generation of internal stress, and improving the stability.

Further, according to the invention corresponding to claim 6, in the superconducting coil of the invention according to claim 1, the superconducting winding has a D shape, and the support is arranged at least at the superconducting winding. Since the outer peripheral side of the straight line portion and the outer peripheral side of the circular arc portion facing the straight line portion are arranged, the deformation due to the electromagnetic force during excitation is effectively suppressed, the occurrence of internal stress is suppressed, and the stability is improved. A superconducting coil that can be improved can be provided.

According to the invention corresponding to claim 7,
In the superconducting coil of the invention according to claim 1,
Since a material with a low friction coefficient is used between the outer or inner peripheral surface of the superconducting winding and the support, it is possible to suppress the generation of frictional heat when it is transformed into a circular shape by the electromagnetic force during excitation. Thus, it is possible to provide a superconducting coil capable of improving stability.

Further, according to the invention corresponding to claim 8, in the superconducting coil of the invention according to claim 1, wherein the support is arranged on the inner peripheral side of a part of the superconducting winding, the circumference of the superconducting winding is Since the heat contraction of the support on the inner peripheral side of the superconducting winding is made larger than the heat contraction in the direction, the vertical drag generated between the support and the superconducting winding during cooling is reduced, A superconducting coil capable of suppressing the generation of frictional heat and improving stability can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a self-bonding superconducting wire used in a superconducting coil according to the present invention.

FIG. 2 is a schematic diagram for explaining a method of manufacturing the superconducting coil according to the first embodiment of the present invention.

FIG. 3 is a schematic view showing a first embodiment of a superconducting coil according to the present invention.

FIG. 4 is a diagram showing a comparison of measurement results of training characteristics of the superconducting coil according to the first embodiment of the present invention and a conventional superconducting coil.

FIG. 5 is a schematic view showing a second embodiment of a superconducting coil according to the present invention.

FIG. 6 is a diagram showing a comparison of measurement results of training characteristics of a superconducting coil according to a second embodiment of the present invention and a conventional superconducting coil.

FIG. 7 is a schematic view showing a third embodiment of a superconducting coil according to the present invention.

FIG. 8 is a diagram showing a comparison of measurement results of training characteristics of a superconducting coil according to a third embodiment of the present invention and a conventional superconducting coil.

FIG. 9 is a schematic view showing a fourth embodiment of a superconducting coil according to the present invention.

FIG. 10 is a schematic diagram showing a configuration example of a conventional superconducting coil.

FIG. 11 is a schematic diagram showing another configuration example of a conventional superconducting coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inner peripheral side of winding frame, 2 ... Side surface of winding frame, 3 ... Winding frame (whole), 4 ... Superconducting wire, 5 ... Superconducting winding, 6 ... Support body, 7 ... Formal, 8 ... Superconducting wire, 9 ... Phenoxy resin, 10 ... Self-bonding wire, 11 ... Winding frame, 12 ... FRP sheet, 13 ... Superconducting winding, 14 ... Peripheral support, 15 ... Side support, 16 ... Wedge-shaped gap, 17. ... Support (outer peripheral side), 18 ... Support (inner peripheral side), 19 ... D type superconducting winding, 20 ... Support (straight part), 21 ... Support (arc part).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Tanaka 2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Toshiba Keihin Office

Claims (8)

[Claims] 1. A superconducting coil formed by winding a superconducting wire in a non-circular shape in a plurality of layers to form a superconducting winding, and fixing the superconducting winding by a support or a winding frame which also serves as a support. As the superconducting wire, using a self-bonding wire in which the surface of the insulation-coated superconducting wire is coated with an insulating material containing a thermoplastic resin or a thermoplastic resin in advance, the support, the outer peripheral side of a part of the superconducting winding or A superconducting coil arranged on at least one side of an inner peripheral side. 2. The superconducting coil according to claim 1, wherein a support body arranged on an outer peripheral side or an inner peripheral side of the superconducting winding and a support body arranged on a side surface side of the superconducting winding are connected to each other. A superconducting coil characterized in that 3. The superconducting coil according to claim 1, wherein a plurality of supports are arranged on an outer peripheral side of the superconducting winding, and a space between the supports is arranged on a side surface side of the superconducting winding. A superconducting coil characterized by being connected by a support. 4. The superconducting coil according to claim 1, wherein a wedge-shaped gap is provided between the superconducting winding and an end portion of a support body arranged on an outer peripheral side or an inner peripheral side thereof. Characteristic superconducting coil. 5. The superconducting coil according to claim 1, wherein the superconducting winding has a racetrack shape, and a support is disposed at least on the outer peripheral side of the straight portion of the superconducting winding and in the superconducting winding. A superconducting coil characterized by being on the inner peripheral side of the arc portion. 6. The superconducting coil according to claim 1, wherein the superconducting winding has a D shape, and a support is disposed at least on the outer peripheral side of the straight portion of the superconducting winding and at the straight portion. A superconducting coil characterized in that it is provided on the outer peripheral side of the arc portion. 7. The superconducting coil according to claim 1, wherein a material having a low friction coefficient is used between an outer peripheral surface or an inner peripheral surface of the superconducting winding and a support. 8. The superconducting coil according to claim 1, wherein a support is arranged on the inner peripheral side of a part of the superconducting winding, wherein the superconducting winding is more thermally contracted in the circumferential direction than the superconducting winding. A superconducting coil characterized in that the heat contraction of the support on the inner peripheral side is increased.