JPH1092629A - Superconducting coil device and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely operate a superconducting coil device by suppressing the transition of the device to a normal conducting state caused by the movement of the insulated covered wire of the winding section of the device when the device is operated. SOLUTION: After an insulated covered wire 14 is formed by covering a superconducting wire 14a with an insulator 14b, a winding section 13 is formed by winding the insulated covered wire 14 around a spool in pluralities of layers and rows while proper tension is given to the wire 14 and fixed in a cryogenic container. At the same time, the winding section 13 is heated to a temperature higher than the glass-transition temperature or softening temperature of the insulator 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting coil device provided with a winding portion formed by winding an insulated wire formed by coating a superconducting wire with an insulating material while winding the wire around a bobbin. The present invention relates to a superconducting coil device and a method of manufacturing the superconducting coil device, which can stably operate by suppressing a transition to a normal conduction state due to a movement of an insulated wire in a winding portion.

[0002]

2. Description of the Related Art As one type of superconducting coil device, a superconducting coil device is used in which an insulated wire is used in which a superconducting wire is coated with an insulating material, and the insulated wire is wound around a bobbin while being pulled. Has been produced. And
For example, the following documents are known regarding a winding portion formed by winding the insulation-coated wire around a winding frame while pulling the wire.

[0003] Moriyama, et al .; "Relationship between winding form strain and stability of superconducting solenoid coil", Low temperature engineering, vol.29 No.12
FIG. 7 is a cross-sectional view showing an example of the configuration of a superconducting coil device having such a winding portion.

In FIG. 7, a superconducting coil device 1 includes a low-temperature container 2, and a central portion of the low-temperature container 2 forms a space 3 in the atmosphere. The inside of the low-temperature container 2 is in a vacuum atmosphere, and the superconducting coil 4 is fixed inside the container.

Further, the superconducting coil 4 is thermally connected to a refrigerator 6 via a heat conductor 5. FIG.
8 is a perspective view in which a part of the superconducting coil 4 is cut away, and the same parts as those in FIG. 7 are denoted by the same reference numerals. .

In FIG. 8, superconducting coil 4 has winding frame 7.
It has. The bobbin 7 has a cylindrical bobbin trunk 7a.
And two donut-shaped bobbin flanges 7b provided on both end surfaces of the bobbin trunk 7a.

[0007] The outer peripheral surface of the bobbin trunk portion 7a and the surface where the two bobbin flange portions 7b face each other are covered with a ground insulating material 8. Further, a winding portion 9 is formed on the outer peripheral side of the bobbin trunk portion 7a with a ground insulator 8 interposed therebetween.

FIG. 9 is a partial sectional view of the superconducting coil 4 in FIG. 8, and the same parts as those in FIG. In FIG. 9, the winding part 9 is composed of an insulated wire 10 and an adhesive resin 11. The insulated wire 10 is wound in a plurality of layers and a plurality of rows while being pulled by a predetermined tension.

[0009] Adhesive resin 11 is impregnated with vacuum pressure between the insulated wires 10 adjacent to each other, and further cured by heating. The insulated wire 10 is formed by covering a superconducting wire 10a with an insulating material 10b.

Next, in the superconducting coil device 1 having the above configuration, when the operation of the superconducting coil device 1 is started, the refrigerator 6 cools down, and the winding 9 also cools down via the heat conductor 5. The winding part 9 enters a superconducting state. Then, a predetermined current flows through the winding portion 9 in the superconducting state,
A magnetic field is generated in the space 3.

Incidentally, such a superconducting coil device 1
In each of the layers of the winding part 9, the insulated wire 10 of each row
However, even if the tension at the time of winding is constant, the tension in the wound state is not completely uniform.

For this reason, the insulated wire 10 may move during operation, and this movement involves heat generation. When the heat generation is large, the superconducting state changes to the normal conducting state (usually called a quench), and there is a problem that a predetermined current does not flow.

[0013]

As described above, in the conventional superconducting coil device, there is a possibility that the insulated wire of the winding part moves during operation and shifts to a normal conduction state, so that stable operation cannot be performed. There was a problem that there is.

An object of the present invention is to provide a superconducting coil device capable of performing a stable operation by suppressing a transition to a normal conduction state due to a movement of an insulated wire of a winding portion during operation, and a method of manufacturing the same. To provide.

[0015]

In order to achieve the above object, according to the first aspect of the present invention, a superconducting wire is coated with an insulating material to form an insulated wire, and then the insulated wire is provided in a predetermined manner. Winding the winding frame in multiple layers and multiple rows while pulling it with the tension to form a winding part, and then fixing the winding part inside the low temperature container, and winding the winding part to the glass transition temperature of the insulating material or Heating is performed at a temperature higher than the softening temperature.

Therefore, in the method for manufacturing a superconducting coil device according to the present invention, the superconducting wire is coated with an insulating material to form an insulated wire, and the insulated wire is wound into a plurality of layers and a plurality of rows while being pulled. A winding is formed by winding around a frame, and this winding is fixed inside the low-temperature container, and the winding is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material. At this time, the insulating material is softened, so that the tension of the wound insulated wire is relaxed, and the tension of the insulated wire in each layer and each row can be made uniform.

According to a second aspect of the present invention, in the method of manufacturing a superconducting coil device according to the first aspect, the winding portion is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material. Meanwhile, vibration is applied to the winding part.

Therefore, in the method of manufacturing a superconducting coil device according to the second aspect of the present invention, vibration is applied to the winding while heating the winding at a temperature higher than the glass transition temperature or softening temperature of the insulating material. By adding, it is possible to further increase the uniformity of the tension of the insulated wire of each layer and each row as compared with the case where only heating is performed.

Further, according to a third aspect of the present invention, in the method for manufacturing a superconducting coil device according to the first aspect, the winding portion is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material. Then, the winding portion is impregnated with an adhesive resin to be solidified.

Therefore, in the method for manufacturing a superconducting coil device according to the present invention, the winding portion is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material.
Next, by impregnating the winding part with an adhesive resin and solidifying it,
After the tension of the insulated wire is relaxed, the adhesive resin undergoes a hardening reaction, which not only equalizes the tension of the insulated wire but also causes damage during the curing reaction of the insulated wire due to the relaxation of the insulated wire. Can not be.

According to a fourth aspect of the present invention, in the method for manufacturing a superconducting coil device according to the first aspect of the present invention, the winding portion is formed at a temperature higher than the glass transition temperature or softening temperature of the insulating material. After heating, the winding is hardened with an adhesive resin, the bobbin is removed from the winding, and then the winding is fixed inside the low-temperature container using a support material.

Therefore, in the method for manufacturing a superconducting coil device according to the present invention, the winding portion is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material.
Next, the winding part is hardened with an adhesive resin, then the bobbin is removed from the winding part, and then the winding part is fixed inside the low-temperature container using a supporting material, thereby tensioning the insulated wire. After the winding is relaxed, the winding part is solidified and then the bobbin is removed, so that not only the tension of the insulated wire is made uniform, but also this uniformity is not reduced by removing the bobbin. be able to.

According to a fifth aspect of the present invention, in the method for manufacturing a superconducting coil device according to the first aspect of the present invention, a plurality of insulated wires are twisted to form a stranded insulated wire. The twisted insulated wire is wound in a plurality of layers and in a plurality of rows on a bobbin while being pulled with a predetermined tension to form a winding portion.

Therefore, in the method for manufacturing a superconducting coil device according to the present invention, a plurality of insulated wires are stranded to form a stranded insulated wire, and the stranded insulated wire is subjected to a predetermined tension. By forming a winding part by winding it in multiple layers and multiple rows around the bobbin while pulling, not only the tension of the insulated wire is made uniform, but also the winding part formed by winding the single insulated wire. AC loss can be reduced in comparison.

According to a sixth aspect of the present invention, in the method of manufacturing a superconducting coil device according to the first aspect, the linear expansion coefficient of the winding frame is larger than the value of the superconducting wire in the longitudinal direction. A winding frame is used.

Therefore, in the method of manufacturing a superconducting coil device according to the present invention, a winding frame having a coefficient of linear expansion larger than the value of the superconducting wire in the longitudinal direction is used, so that the coil is heated during the heating. Since the frame spreads the inner layer of the winding part, not only the tension of the insulated wire is made uniform, but also the insulated wire can be densely arranged in the layer direction.

Further, according to a seventh aspect of the present invention, in the method for manufacturing a superconducting coil device according to the first aspect, the winding tension of the insulated wire around the bobbin is reduced.
The winding portion is formed higher in the outer layer than in the inner layer of the winding portion.

Therefore, in the method for manufacturing a superconducting coil device according to the present invention, the winding tension of the insulated wire around the winding frame is made higher in the outer layer than in the inner layer of the winding portion. At the time of heating, the insulated wire is greatly relaxed in the outer layer compared to the inner layer, so that not only the tension of the insulated wire is made uniform, but also the insulated wire can be densely arranged in the layer direction.

According to an eighth aspect of the present invention, in the method of manufacturing a superconducting coil device according to the first aspect of the present invention, a strain gauge is pasted on a bobbin so as to prevent the strain gauge from being heated before heating. Later, the strain of the bobbin is measured.

Therefore, in the method of manufacturing a superconducting coil device according to the present invention, a strain gauge is attached to the bobbin, and the strain of the bobbin is measured before and after the heating, so that the distortion is measured. The uniformity of the tension of the insulated wire can be quantitatively inspected from the change in

Further, in the invention corresponding to claim 9, in the method for manufacturing a superconducting coil device according to the invention described in claim 1, the winding portion and the refrigerator are thermally connected.

Therefore, in the method for manufacturing a superconducting coil device according to the ninth aspect of the present invention, the winding portion is thermally connected to the refrigerator, so that the winding portion is not immersed in the refrigerant. Can be cooled to temperature.

As described above, the transition to the normal conduction state due to the movement of the insulated wire of the winding portion during operation can be suppressed, and the superconducting coil device can be operated stably. On the other hand, in the invention corresponding to claim 10, the above-described claims 1 to 4 are provided.
Of the invention corresponding to any one of the above.

Therefore, in the superconducting coil device according to the tenth aspect of the present invention, since the tension of the insulated wires in a plurality of layers and in a plurality of rows of the winding portion is made uniform, the insulated wires are not moved during operation. Become. That is, the transition to the normal conduction state due to the movement of the insulated wire of the winding portion during operation can be suppressed, and the superconducting coil device can be stably operated.

[0035]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) FIG. 1 is a partial cross-sectional view of a superconducting coil in a superconducting coil device according to a first embodiment of the present invention. Is shown.

The configuration of the superconducting coil device according to the present embodiment is the same as that shown in FIG. 7, and the configuration of the superconducting coil is the same as that shown in FIG. The illustration is omitted.

The superconducting coil device of the present embodiment is manufactured as follows. That is, as shown in FIG.
The insulating wire 14a is formed by covering the metal superconducting wire 14a with the insulating material 14b. The insulating material 14b is a polyvinyl formal having a glass transition temperature or a softening temperature of 115 degrees Celsius.

Next, the insulator 7 is coated on the outer peripheral side of the trunk 7a (the collar 7b is not shown) of the winding frame 7. next,
A plurality of layers and a plurality of rows are wound around the outer periphery of the insulator 8 while pulling the insulated wire 14 with a predetermined tension to form the winding portion 13 of the superconducting coil 12.

Next, after this winding, the winding portion 13 of the superconducting coil 12 is fixed inside the low temperature container 2 and the winding portion 13 is heated to a temperature higher than the glass transition temperature or softening temperature of the insulating material 14b. (120 degrees Celsius).

Next, in the superconducting coil device provided with the superconducting coil 12 obtained by the above manufacturing method, the winding portion 13 of the superconducting coil 12 is connected to the glass transition temperature or softening temperature (Celsius) of the insulating material 14b. By heating at a temperature (120 degrees Celsius) higher than 115 degrees Celsius, the insulating material 14b between the adjacent insulated wires 14 changes from a glassy state to a rubbery state during heating. Softens. Moreover, the insulating material 14b is made of the insulated wire 1
4 is creep deformed because it is compressed by the tension in the wound state. In particular, the insulating material 14b in a portion where the tension is locally high undergoes large creep deformation. Then, due to the creep deformation, the tension in the wound state of the insulated wire 14 is reduced, and the tension of the insulated wire 14 in each layer and each row is made uniform.

Thus, the insulated wire 1 of the winding portion 13
4 does not move during operation, and suppresses the transition of the winding portion 13 to the normal conduction state due to the movement of the insulated wire 14.
The superconducting coil device can be operated stably.

FIG. 6 shows the current (quenching current I) when the winding portions 13 before and after the heating are respectively shifted to the normal conduction state.
q) is repeated five times to measure the current Iq and its upper limit I
FIG. 9 is a characteristic diagram in which a ratio Iq / Ic with respect to c is plotted.

From FIG. 6, it can be seen that the current Iq after heating is clearly larger than the current Iq before heating, that is, the transition to the normal conduction state does not easily occur by heating.

As described above, in the superconducting coil device of the present embodiment, the insulating wire 14 is formed by covering the metal-based superconducting wire 14a with the insulating material 14b, and then the body 7a of the bobbin 7 is formed. Is wound on a plurality of layers and a plurality of rows on the outer circumference of the ground insulating material 8 while pulling the insulated wire 14 with a predetermined tension. After that, the winding portion 13 is connected to the low-temperature container 2.
And the winding portion 13 is heated at a temperature higher than the glass transition temperature or the softening temperature of the insulating material 14b.

Therefore, the insulating material 14b is softened at the time of heating, so that the tension of the wound insulated wire 14 is relaxed, and the layers of the winding portion 13 and the insulated wire 14 in each row are relaxed.
, The insulated wire 14 of the winding portion 13 does not move during operation. That is, it is possible to suppress the transition of the winding portion 13 to the normal conduction state due to the movement of the insulated wire 14 during operation, and to stably operate the superconducting coil device.

On the other hand, it is known that if the winding portion 13 repeatedly transitions to a normal conduction state due to energization, the transition gradually becomes difficult. In other words, the repetition of the transition by energization can be used to suppress the subsequent transition. However, the transition due to energization involves a large amount of heat generation of the winding portion 13, so that a large amount of cryogenic refrigerant is required to cool the heated winding portion 13 to a predetermined temperature.

In this regard, in the present embodiment, since the transition is suppressed by using heating, a superconducting coil device in which the winding portion 13 and the refrigerator 6 are thermally connected without using a cryogenic refrigerant is used. This is preferable for the application of.

(Second Embodiment) FIG. 2 is a cross-sectional view showing a configuration example of a superconducting coil and a heating and vibrating device before being incorporated in a superconducting coil device according to a second embodiment of the present invention. The same parts as those in FIGS. 8 and 9 are denoted by the same reference numerals.

The configuration of the superconducting coil device according to the present embodiment is the same as that shown in FIG. 7, and the configuration of the superconducting coil is the same as that shown in FIG. The illustration is omitted.

In FIG. 2, the superconducting coil 15 is housed inside a heating and vibrating device 16. Heating vibration device 1
6 comprises a heater wire 17, a fan 18, a connecting portion 19, and a vibrator 20. That is, the heating vibration device 1
Hot air is circulated inside 6 by a heater wire 17 and a fan 18. The superconducting coil 15 is heated to 120 degrees Celsius by the hot air.

Further, the superconducting coil 15 and the vibrator 20 are connected by a connecting portion 19 so that vibration of 10 Hz or more is applied to the superconducting coil 15.

FIG. 3 is a partial sectional view of the superconducting coil 15 in FIG. 2, and the same parts as those in FIG. 9 are denoted by the same reference numerals. The superconducting coil device of the present embodiment is manufactured as follows.

That is, as shown in FIG. 3, a metal-based superconducting wire 22a is coated with an insulating material 22b to form an insulated wire 22. The insulating material 22b is a polyvinyl formal having a glass transition temperature or a softening temperature of 115 degrees Celsius.

Next, the insulator 7 is coated on the outer periphery of the trunk 7a (the collar 7b is not shown) of the bobbin 7. next,
A plurality of layers and a plurality of rows are wound around the outer periphery of the insulator 8 while pulling the insulated wire 22 with a predetermined tension to form the winding portion 21 of the superconducting coil 15.

Next, after this winding, the winding 21 of the superconducting coil 15 is fixed inside the low temperature container 2, and the winding 21 is
Vibration is applied to the winding part 21 while heating at a temperature (120 degrees Celsius) higher than the glass transition temperature or softening temperature of 2b.

Next, in the superconducting coil device provided with the superconducting coil 15 obtained by the above-described manufacturing method, the winding portion 21 of the superconducting coil 15 is connected to the heating and vibrating device 1.
6, by heating at a temperature (120 degrees Celsius) higher than the glass transition temperature or softening temperature (115 degrees Celsius) of the insulating material 22b, between the adjacent insulated wire 22 and the insulated wire 22 during heating. The insulating material 22b transitions from a glass state to a rubber state and softens. In addition, since the superconducting coil 15 is vibrated by the heating and vibrating device 16, the tension of the insulated wire 22 of each layer and each row is lower than that of the case where only heating is performed as in the first embodiment. Becomes even more uniform.

Thus, the insulated wire 1 of the winding portion 21
4 does not move during operation, and suppresses the transition of the winding portion 13 to the normal conduction state due to the movement of the insulated wire 14.
The superconducting coil device can be operated more stably.

As described above, in the superconducting coil device according to the present embodiment, an insulating coated electric wire 22 is formed by coating a metal superconducting wire 22a with an insulating material 22b. Is wound on a plurality of layers and a plurality of rows while pulling the insulated wire 22 on the outer periphery of the ground insulator 8 with a predetermined tension to form a winding portion 21. After that, the winding part 21 is connected to the low-temperature container 2.
And the winding portion 21 is fixed to the heating and vibrating device 1.
By virtue of 6, vibration is applied to the winding portion 21 while heating at a temperature higher than the glass transition temperature or softening temperature of the insulating material 22b.

Therefore, the same effect as that of the first embodiment can be obtained, and the winding portion 13 can be more easily compared to the case where only the heating is performed as in the first embodiment.
The tension of the insulated wire 14 of each layer and each row can be made even more uniform, and the insulated wire 14 of the winding portion 13 does not move during operation. In other words, the transition of the winding portion 13 to the normal conduction state due to the movement of the insulated wire 14 during operation can be suppressed, and the superconducting coil device can be operated more stably.

(Third Embodiment) FIG. 4 is a partial cross-sectional view of a superconducting coil in a superconducting coil device according to a third embodiment of the present invention. It is shown attached.

The configuration of the superconducting coil device according to the present embodiment is the same as that shown in FIG. 7, and the configuration of the superconducting coil is the same as that shown in FIG. The illustration is omitted.

The superconducting coil device according to the present embodiment is manufactured as follows. That is, as shown in FIG.
A metal-based superconducting wire 25a is coated with an insulating material 25b to form an insulated wire 25. The insulating material 25b is a polyvinyl formal having a glass transition temperature or a softening temperature of 115 degrees Celsius.

Next, the insulator 7 is coated on the outer peripheral side of the trunk 7a (the collar 7b is not shown) of the bobbin 7. next,
A plurality of layers and a plurality of rows are wound around the outer periphery of the ground insulator 8 while pulling the insulated wire 25 with a predetermined tension to form the winding portion 24 of the superconducting coil 23.

Next, after the winding, the winding portion 24 of the superconducting coil 23 is fixed inside the low temperature container 2 and the winding portion 24 is heated to a temperature higher than the glass transition temperature or softening temperature of the insulating material 25b. (120 degrees Celsius).

Next, after this heating, the adhesive resin 11 is impregnated with vacuum pressure between the insulated wire 25 and the insulated wire 25 adjacent to the winding portion 24 to be heated and hardened (hardened).
Next, in the superconducting coil device provided with the superconducting coil 23 obtained by the above-described manufacturing method, the winding portion 24 of the superconducting coil 23 is connected to the glass transition temperature or softening temperature (115 degrees Celsius) of the insulating material 22b. By heating at a higher temperature (120 degrees Celsius), the insulated wire 25
The tension in the wound state is relaxed and uniform.
Next, the winding portion 24 is integrally bonded by vacuum pressure impregnation and heat curing of the bonding resin 11. Moreover, since the bonding resin 11 is cured after the tension of the insulated wire 25 is relaxed, damage during the curing reaction of the bonding resin 11 due to the relaxation of the tension of the insulated wire 25 is prevented.

Thus, the insulated wire 2
5 does not move during operation, and suppresses the transition of the winding portion 24 to the normal conduction state due to the movement of the insulated wire 25.
Not only can the superconducting coil device be operated more stably, but also it is possible to prevent damage during the curing reaction of the bonding resin 11 due to relaxation of the tension of the insulated wire 25.

As described above, in the superconducting coil device according to the present embodiment, the insulating material 25b is coated on the metal superconducting wire 25a to form the insulated wire 25, and then the body 7a of the bobbin 7 is formed. Is wound on a plurality of layers and a plurality of rows on the outer circumference of the ground insulating material 8 while pulling the insulated wire 25 with a predetermined tension to form a winding portion 24. Next, the winding portion 24 is fixed inside the low temperature container 2 and the winding portion 24 is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material 25b, and then the winding portion 24 is placed next to the winding portion 24. The adhesive resin 11 is impregnated with vacuum pressure between the insulated coated electric wires 25 and the insulated coated electric wires 25 so as to be cured by heating (hardening).

Therefore, the same effect as that of the first embodiment can be obtained, and in addition, damage during the curing reaction of the bonding resin 11 due to relaxation of the tension of the insulated wire 25 can be obtained. Can be prevented from occurring.

(Fourth Embodiment) FIG. 5 is a sectional view showing an example of the configuration of a superconducting coil device according to a fourth embodiment of the present invention. It is shown attached.

The superconducting coil device 26 of the present embodiment
It is manufactured as follows. That is, as shown in FIG. 5, a winding portion 27 similar to the winding portion 24 in the fourth embodiment is heated at a temperature (120 degrees Celsius) higher than the glass transition temperature or softening temperature of the insulating material. I do.

Next, after this heating, the winding part 27 is solidified with an adhesive resin. Next, the bobbin is removed from the winding portion 27. Next, the winding part 27 is fixed inside the low temperature container 2 using the support plate 28 and the plurality of support rods 29.

Next, in the superconducting coil device 26 obtained by the above-described manufacturing method, since the winding frame is removed, the winding portion 27 can be brought closer to the space 3. Then, when the winding portion 27 is brought closer to the space 3, the magnetic field generated in the space 3 increases. Moreover, after the tension of the insulated wire is relaxed and uniformized and the winding portion 27 is solidified, the winding frame is removed, so that the winding portion 27 is not damaged by this removal.

As a result, the insulated wire of the winding portion 27 does not move during operation, the transition to the normal conducting state due to the movement of the insulated wire of the winding portion 27 is suppressed, and the superconducting coil device is further improved. Not only can it be operated stably, but also the bobbin is removed after the tension of the insulated wire has been relaxed, and this uniformity can be prevented from being reduced by removing the bobbin.

As described above, in the superconducting coil device according to the present embodiment, a metal-based superconducting wire is coated with an insulating material to form an insulated wire, and then the grounding is provided on the outer peripheral side of the body of the bobbin. After covering the insulating material, the insulating coated electric wire is wound around the outer periphery of the ground insulating material in a plurality of layers and in a plurality of rows while pulling the insulated wire with a predetermined tension to form a winding portion 27.
Is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material, then the winding portion 27 is hardened with an adhesive resin, the winding frame is removed from the winding portion 27, and then the support plate 28 and a plurality of The winding portion 27 is fixed inside the low-temperature container 2 using the support member 29 of FIG.

Therefore, not only the same effects as in the first embodiment can be obtained, but also the winding frame is removed after the tension of the insulated wire is relaxed.
It is possible to prevent the uniformity of the tension of the insulated wire from being reduced by removing the bobbin.

(Fifth Embodiment) The superconducting coil device of the present embodiment is manufactured as follows. That is, in the superconducting coil device of the present embodiment, a plurality of insulated wires 14 in the superconducting coil device according to the first embodiment shown in FIG.

Next, the insulator 7 is coated on the outer peripheral side of the trunk portion 7a (the collar portion 7b is not shown) of the winding frame 7. next,
The winding portion 13 of the superconducting coil 12 is formed by winding the stranded insulated insulated wire in a plurality of layers and a plurality of rows while pulling the stranded insulated wire with a predetermined tension on the outer peripheral side of the ground insulator 8.

Next, after this winding, the winding portion 13 of the superconducting coil 12 is fixed inside the low temperature container 2, and the winding portion 13 is fixed to the glass transition temperature or softening of the insulating material 14 b of the insulated wire 14. Temperature higher than temperature (12 degrees Celsius
(0 degree).

Next, in the superconducting coil device having the superconducting coil 12 obtained by the above-described manufacturing method, the winding portion 13 of the superconducting coil 12 is connected to the glass transition temperature or softening temperature (Celsius) of the insulating material 14b. By heating at a temperature (120 degrees Celsius) higher than 115 degrees Celsius, the insulating material 14b between the adjacent insulated wires 14 changes from a glassy state to a rubbery state during heating. The wire is softened, and the tension in the wound state of the twisted insulated wire is made uniform. Moreover, by twisting the plurality of insulated wires 14 to form a stranded insulated wire, the single insulated wire 14 is simply thickened, that is, compared to the case where the single insulated wire 14 is wound. AC loss can be reduced.

As described above, in the superconducting coil device of the present embodiment, a plurality of insulated wires 14 made of a metal superconducting wire 14a coated with an insulating material 14b are twisted to form a stranded insulated wire. And then the body 7 of the bobbin 7
a is covered with a ground insulating material 8, and then the twisted insulated wire is wound in a plurality of layers and a plurality of rows on the outer circumferential side of the ground insulating material 8 while being pulled with a predetermined tension. The winding portion 13 is formed, and thereafter, the winding portion 13 of the superconducting coil 12 is fixed inside the low temperature container 2, and the winding portion 13 is connected to the glass transition temperature or softening temperature of the insulating material 14 b of the insulated wire 14. Higher temperature (12 degrees Celsius)
(0 degree).

Accordingly, the same effect as that of the first embodiment can be obtained, and the winding formed by winding the single insulated wire 14 as in the first embodiment can be obtained. Compared with the case of the section 13, it is possible to reduce the AC loss.

(Sixth Embodiment) The superconducting coil device of the present embodiment is manufactured as follows. That is, the superconducting coil device of the present embodiment has a linear expansion coefficient, as compared with the value in the longitudinal direction of the superconducting wire 14a, as the winding frame 7 in the superconducting coil device according to the first embodiment shown in FIG. A large reel is used.

Specifically, in this embodiment, the material of the winding frame 7 is an aluminum alloy. The coefficient of linear expansion between room temperature and 120 degrees Celsius of this aluminum alloy is 23 × 10 −6.
/ K.

The superconducting wire 14a is made of NbTi having a copper ratio of 3
I'm on a line. The linear expansion coefficient of the superconducting wire 14a in the longitudinal direction is 16 × 10 −6 / K. Next, in the superconducting coil device provided with the superconducting coil 12 obtained by the above-described manufacturing method, the linear expansion coefficient of the bobbin 7 is made larger than the value in the longitudinal direction of the superconducting wire 14a. When the winding portion 13 of the superconducting coil 12 is heated, the bobbin trunk portion 7a pushes the inner layer of the winding portion 13 toward the outer layer. For this reason, not only is the tension of the insulated wire 14 uniform, but also the insulating material 14b between the layers of the insulated wire 14 is creeped and the interlayer is narrowed, so that the insulated wires 14 are densely arranged in the layer direction. Become.

As described above, in the superconducting coil device of the present embodiment, the insulating wire 14 is formed by covering the metal superconducting wire 14 a with the insulating material 14 b, and then the body 7 a of the bobbin 7 is formed. Is wound on a plurality of layers and a plurality of rows on the outer circumference of the ground insulating material 8 while pulling the insulated wire 14 with a predetermined tension. After that, the winding portion 13 is connected to the low-temperature container 2.
And the winding portion 13 is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material 14b, and the linear expansion coefficient of the winding form 7 is set to a value in the longitudinal direction of the superconducting wire 14a. It is designed to be larger than that.

Therefore, the same effect as that of the first embodiment can be obtained, and the insulated wire 14
Can be densely arranged in the layer direction. (Seventh Embodiment) The superconducting coil device of the present embodiment is manufactured as follows.

That is, the superconducting coil 1 in the superconducting coil device according to the first embodiment shown in FIG.
2, the winding portion 13 was formed with a constant winding tension of the insulated wire 14, whereas the superconducting coil 12 in the superconducting coil device of the present embodiment wound the insulated wire 14 around the bobbin. The winding portion 13 is formed by increasing the tension in the outer layer as compared with the inner layer of the winding portion 13, that is, by lowering the winding tension in the inner layer close to the bobbin trunk 7a and increasing the winding tension in the outer layer farther away. .

Next, in the superconducting coil device provided with the superconducting coil 12 obtained by the above-described manufacturing method, the winding tension of the insulated wire 14 around the winding frame 7 is compared with that of the inner layer of the winding portion. By increasing the height in the outer layer, the insulating material 14b is softened when the superconducting coil 12 is heated, and the outer insulated wire 14 compresses the inner insulated wire 14 in the inner layer direction. Become densely arranged. In addition, as in the case of the above-described embodiment, the tension of the insulated wire 14 in each layer and each row is equalized.

As described above, in the superconducting coil device according to the present embodiment, the insulating wire 14 is formed by covering the metal-based superconducting wire 14 a with the insulating material 14 b, and then the body 7 a of the bobbin 7 is formed. Is wound on a plurality of layers and a plurality of rows on the outer circumference of the ground insulating material 8 while pulling the insulated wire 14 with a predetermined tension. After that, the winding portion 13 is connected to the low-temperature container 2.
, And heats the winding portion 13 at a temperature higher than the glass transition temperature or softening temperature of the insulating material 14 b, and adjusts the winding tension of the insulated wire 14 to the winding frame by the winding portion 13. The winding part 1 is made higher in the outer layer than in the inner layer.
No. 3 is formed.

Therefore, the same effect as that of the first embodiment can be obtained, and the insulated wire 14
Can be densely arranged in the layer direction. (Eighth Embodiment) In a superconducting coil device according to the present embodiment, a strain gauge is attached to the inner peripheral surface of a bobbin trunk 7a in the superconducting coil device according to the first embodiment shown in FIG. The strain of the bobbin trunk 7a is measured before and after the heating of the superconducting coil 12 in advance.

Next, in the superconducting coil device provided with the superconducting coil 12 obtained by the above manufacturing method, when the superconducting coil 12 is heated, the tension of the insulated wire 14 of each layer and each row is relaxed. Make uniform. Then, with the relaxation of the tension, the strain of the bobbin trunk 7a changes. Therefore, by measuring the change in the strain of the bobbin trunk 7a, it is possible to quantitatively inspect the uniformity of the tension of the insulated wire 14 from the change in the strain.

As described above, in the superconducting coil device according to the present embodiment, the insulated wire 14 is formed by covering the metal-based superconducting wire 14a with the insulating material 14b, and then the body 7a of the bobbin 7 is formed. Is wound on a plurality of layers and a plurality of rows on the outer circumference of the ground insulating material 8 while pulling the insulated wire 14 with a predetermined tension. After that, the winding portion 13 is connected to the low-temperature container 2.
, The winding 13 is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material 14b, and a strain gauge is attached to the inner peripheral surface of the bobbin trunk 7a. The strain of the bobbin trunk 7a is measured before and after the heating of No. 12.

Therefore, the same effect as that of the first embodiment can be obtained, and the tension of the insulated wire 14 can be obtained from the change in the strain of the bobbin body 7a before and after heating. It is possible to quantitatively inspect the homogeneity of the sample.

(Ninth Embodiment) In the superconducting coil device according to the ninth embodiment, the winding portion 27 of the superconducting coil device according to the fourth embodiment shown in FIG. Before or after fixing to the winding, the winding 27 formed on the winding frame 7 is heated at 120 degrees Celsius, and the winding 27 and the refrigerator 6 are thermally connected via the heat conductor 5. To connect to.

Next, in the superconducting coil device obtained by the above-described manufacturing method, the tension in the wound state of the insulated wire is increased by heating the winding portion 27. As in the case of each of the eighth embodiments, the uniformization is performed. In addition, by thermally connecting the winding part 27 and the refrigerator 6 with the heat conductor 5, the winding part 27 can be cooled to a predetermined temperature without being immersed in a cryogenic refrigerant.

As described above, in the superconducting coil device according to the present embodiment, a metal-based superconducting wire is coated with an insulating material to form an insulated wire, and then the grounding is provided on the outer peripheral side of the body of the bobbin. After covering the insulating material, the insulating coated electric wire is wound around the outer periphery of the ground insulating material in a plurality of layers and in a plurality of rows while pulling the insulated wire with a predetermined tension to form a winding portion 27.
Is heated at a temperature higher than the glass transition temperature or softening temperature of the insulating material, then the winding portion 27 is solidified with an adhesive resin, the winding frame is removed from the winding portion 27, and then the support plate 28 and the plurality of The winding portion 27 is fixed inside the low-temperature container 2 by using the support member 29 described above, and the winding portion 27 and the refrigerator 6 are thermally connected via the heat conductor 5. Things.

Accordingly, the same effect as that of the fourth embodiment can be obtained, and it is possible to cool the winding portion 27 to a predetermined temperature without immersing it in the cryogenic refrigerant. Becomes

(Other Embodiments) (a) In each of the first to ninth embodiments, the case where a metal-based superconducting wire is used as the superconducting wire has been described. However, the present invention is not limited to this. Alternatively, a compound-based superconducting wire or a high-temperature superconducting wire may be used, and in this case, the same operation and effect as those of the first to ninth embodiments can be obtained. .

(B) In each of the first to ninth embodiments, the shape of the superconducting wire may be a single wire, a stranded wire, or a forced cooling conductor. It is possible to obtain the same operation and effect as in the case of the embodiment.

(C) In each of the first to ninth embodiments, the insulating material may be an organic material such as polyvinyl formal, an inorganic material or a composite material of an inorganic material and an organic material. The same operation and effect as in the ninth embodiments can be obtained.

[0101]

As described above, according to the first aspect of the present invention, an insulated wire is formed by coating a superconducting wire with an insulating material, and then the insulated wire is pulled with a predetermined tension. A winding part is formed by winding the winding part in a plurality of layers and a plurality of rows, and then the winding part is fixed inside the low temperature container, and the winding part is higher than the glass transition temperature or softening temperature of the insulating material. Because it is heated at the temperature, the tension of the wound insulated wire is reduced,
A method of manufacturing a superconducting coil device capable of equalizing the tension of the insulated wires in each row and suppressing a transition to a normal conduction state due to the movement of the insulated wires in the winding portion during operation, thereby enabling stable operation. Can be provided.

According to the second aspect of the present invention,
In the method of manufacturing a superconducting coil device according to the first aspect of the present invention, vibration is applied to the winding while heating the winding at a temperature higher than the glass transition temperature or softening temperature of the insulating material. In addition, the uniformity of the tension of the insulated wires in each layer and each row is further increased, and the transition to the normal conduction state due to the movement of the insulated wires in the winding portion during operation is performed, thereby performing more stable operation. And a method for manufacturing a superconducting coil device capable of performing the method.

Further, according to a third aspect of the present invention, in the method of manufacturing a superconducting coil device according to the first aspect, the winding portion is heated to a temperature higher than the glass transition temperature or softening temperature of the insulating material. And then harden by impregnating the winding resin with the adhesive resin, so that the tension of the insulated wire is made uniform and the adhesive resin is damaged during the curing reaction due to the relaxation of the tension of the insulated wire. And a method for manufacturing a superconducting coil device capable of suppressing the transition to the normal conduction state due to the movement of the insulated wire of the winding portion during operation and operating more stably.

According to a fourth aspect of the present invention, in the method of manufacturing a superconducting coil device according to the first aspect of the present invention, the winding portion is higher than the glass transition temperature or softening temperature of the insulating material. Heated at temperature, then solidified the windings with adhesive resin, then removed the bobbin from the windings, and then fixed the windings inside the low temperature container using the support material Therefore, the tension of the insulated wire is made uniform, the uniformity is not reduced by removing the bobbin, and the transition to the normal conduction state due to the movement of the insulated wire of the winding part during operation is suppressed. A method for manufacturing a superconducting coil device capable of performing more stable operation can be provided.

On the other hand, according to the invention corresponding to claim 5,
In the method for manufacturing a superconducting coil device according to the first aspect of the present invention, a twisted insulated wire is formed by twisting a plurality of insulated wires, and then the bobbin is pulled while the twisted insulated wire is pulled at a predetermined tension. In order to form a winding part by winding in a plurality of layers and a plurality of rows, the tension of the insulated wire can be made uniform, and the AC loss can be reduced.
It is possible to provide a method of manufacturing a superconducting coil device capable of suppressing a transition to a normal conduction state due to a movement of an insulated wire of a winding portion during operation and performing more stable operation.

According to the invention corresponding to claim 6,
In the method for manufacturing a superconducting coil device according to the first aspect of the present invention, since a coil having a linear expansion coefficient larger than a value in the longitudinal direction of the superconducting wire is used as the coil,
In addition to making the tension of the insulated wire uniform, the insulated wire is densely arranged in the layer direction to suppress the transition of the winding to the normal conduction state due to the movement of the insulated wire during operation, making it even more stable. A method for manufacturing a superconducting coil device that can be operated can be provided.

According to a seventh aspect of the present invention, in the method for manufacturing a superconducting coil device according to the first aspect, the winding tension of the insulated wire around the bobbin is reduced by the inner layer of the winding portion. Since the outer layer is higher than the outer layer to form the winding, the tension of the insulated wire is made uniform, and the insulated wire is arranged densely in the layer direction to insulate the winding during operation. It is possible to provide a method of manufacturing a superconducting coil device capable of suppressing a transition to a normal conduction state due to the movement of a covered electric wire and performing a more stable operation.

According to an eighth aspect of the present invention,
In the method for manufacturing a superconducting coil device according to the first aspect of the present invention, the strain gauge is attached to the bobbin so that the strain gauge measures the strain of the bobbin before and after heating. And a method for manufacturing a superconducting coil device capable of quantitatively inspecting the uniformity of the tension of the insulated wire from the change in the electric power.

According to a ninth aspect of the present invention, in the method of manufacturing a superconducting coil device according to the first aspect, the winding part and the refrigerator are thermally connected. In addition, it is possible to provide a method of manufacturing a superconducting coil device capable of cooling a winding portion to a predetermined temperature without being immersed in a refrigerant.

On the other hand, according to the tenth aspect of the present invention, since the manufacturing method according to any one of the first to fourth aspects of the present invention is used, the winding part during operation is manufactured. A superconducting coil device capable of stably operating by suppressing the transition to the normal conducting state due to the movement of the insulated wire can be provided.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a configuration example of a superconducting coil in a superconducting coil device according to first, fifth to eighth embodiments according to the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration example of a superconducting coil and a heating and vibrating device in a superconducting coil device according to a second embodiment of the present invention.

FIG. 3 is a partial cross-sectional view showing a configuration example of a superconducting coil in the superconducting coil device according to the second embodiment.

FIG. 4 is a partial sectional view showing a configuration example of a superconducting coil in a superconducting coil device according to a third embodiment of the present invention.

FIG. 5 is a sectional view showing a configuration example of a superconducting coil device according to fourth and ninth embodiments according to the present invention.

FIG. 6 is a diagram for explaining the function and effect of the present invention.

FIG. 7 is a sectional view showing a configuration example of a conventional superconducting coil device.

8 is a perspective view in which a part of the superconducting coil in FIG. 7 is cut away.

FIG. 9 is a partial cross-sectional view of the superconducting coil in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... superconducting coil device, 2 ... low temperature container, 3 ... space part, 4 ... superconducting coil, 5 ... heat conductor, 6 ... refrigerator, 7 ... reel, 7a ... reel body, 7b ... reel Reference numeral 8: Insulation to ground, 9: Winding part, 10: Insulated wire, 10a: Superconducting wire, 10b: Insulating material, 11: Adhesive resin, 12: Superconducting coil, 13: Winding part, 14: Insulation Covered electric wire, 14a: superconducting wire, 14b: insulating material, 15: superconducting coil, 16: heating and vibrating device, 17: heater wire, 18: fan, 19: connecting portion, 20: vibrating machine, 21: winding portion , 22 ... insulated wire, 22a ... superconducting wire. 22b: Insulating material, 23: Superconducting coil, 24: Winding part, 25: Insulated wire, 25a: Superconducting wire. 25b: insulating material, 26: superconducting coil device, 27: winding part, 28: support plate, 29: support rod.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masanori Shin 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Toshiba Keihin Works Co., Ltd.

Claims (10)

[Claims] A superconducting wire is coated with an insulating material to form an insulated wire. Next, the insulated wire is wound in a plurality of layers and in a plurality of rows around a winding frame while being pulled with a predetermined tension. Forming, and thereafter, fixing the winding portion inside the low temperature container, and heating the winding portion at a temperature higher than the glass transition temperature or softening temperature of the insulating material. Of manufacturing a superconducting coil device. 2. The method for manufacturing a superconducting coil device according to claim 1, wherein the winding part is vibrated while being heated at a temperature higher than a glass transition temperature or a softening temperature of the insulating material. A method for manufacturing a superconducting coil device, characterized by adding: 3. The method of manufacturing a superconducting coil device according to claim 1, wherein the winding is heated at a temperature higher than a glass transition temperature or a softening temperature of the insulating material, and then the winding is heated. A method for manufacturing a superconducting coil device, characterized by impregnating and solidifying an adhesive resin. 4. The method for manufacturing a superconducting coil device according to claim 1, wherein the winding is heated at a temperature higher than a glass transition temperature or a softening temperature of the insulating material, and then the winding is heated. A superconducting coil, wherein the superconducting coil is fixed with an adhesive resin, then the winding frame is removed from the winding portion, and then the winding portion is fixed inside the low-temperature container using a support material. Device manufacturing method. 5. The method of manufacturing a superconducting coil device according to claim 1, wherein a plurality of the insulated wires are twisted to form a stranded insulated wire, and then the stranded insulated wire is subjected to a predetermined tension. A method for manufacturing a superconducting coil device, wherein a winding portion is formed by winding a plurality of layers and a plurality of rows around a winding frame while pulling the coil. 6. The method of manufacturing a superconducting coil device according to claim 1, wherein a winding frame having a linear expansion coefficient larger than a value in a longitudinal direction of the superconducting wire is used as the winding frame. A method for manufacturing a superconducting coil device. 7. The method for manufacturing a superconducting coil device according to claim 1, wherein winding tension of the insulated wire around the bobbin is higher in an outer layer than in an inner layer of the winding portion. A method for manufacturing a superconducting coil device, wherein a portion is formed. 8. The method for manufacturing a superconducting coil device according to claim 1, wherein a strain gauge is pasted on the bobbin so that the strain gauge measures the strain of the bobbin before and after the heating. A method of manufacturing a superconducting coil device. 9. The method for manufacturing a superconducting coil device according to claim 1, wherein the winding portion and the refrigerator are thermally connected. 10. A superconducting coil device manufactured by the manufacturing method according to any one of claims 1 to 4.