JP3426671B2 - Superconducting conductor - Google Patents
Superconducting conductorInfo
- Publication number
- JP3426671B2 JP3426671B2 JP29783693A JP29783693A JP3426671B2 JP 3426671 B2 JP3426671 B2 JP 3426671B2 JP 29783693 A JP29783693 A JP 29783693A JP 29783693 A JP29783693 A JP 29783693A JP 3426671 B2 JP3426671 B2 JP 3426671B2
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- twisted
- wires
- wire
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は電気導体として用いられ
る撚線構造の超電導導体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting conductor having a twisted wire structure used as an electric conductor.
【０００２】[0002]
【従来の技術】開発当初の超電導導体は、一定の電流を
通電するだけであったが、その後の改良により電流を急
激に変化させたり、交流電流での使用が可能になってき
た。このような一定電流以外での条件下では、超電導線
が変動磁界を受けると所謂交流損失のため発熱する。こ
の交流損失を大きく分類すると、第１に超電導フィラメ
ントに発生するヒステリシス損失、第２に安定化材中に
発生する渦電流損失、第３に素線内のフィラメントや素
線間の電流ループによる結合損失がある。2. Description of the Related Art A superconducting conductor at the beginning of development only passed a constant current, but improvements made thereafter have made it possible to rapidly change the current or use it with an alternating current. Under conditions other than such a constant current, when the superconducting wire receives a fluctuating magnetic field, it generates heat due to so-called AC loss. This AC loss can be roughly classified into the following: first, hysteresis loss that occurs in superconducting filaments, second, eddy current loss that occurs in stabilizing materials, and third, coupling by filaments in the wires and current loops between the wires. There is a loss.
【０００３】このうち第１のヒステリシス損失は、超電
導フィラメントの線径を細くすることによって減少でき
る、第２の渦電流損失は、素線径を細くしたり、安定化
材を高電気抵抗の材料で細かく区切ることによって減少
できる。第３の結合損失は、フィラメントを捻るツイス
トを施して電流ループを小さくし、フィラメント間に高
電気抵抗の材料の層を設けると共に、素線の外周にも電
気絶縁を施して撚り合わせることが行われる。Of these, the first hysteresis loss can be reduced by thinning the wire diameter of the superconducting filament, and the second eddy current loss is the material having a thin wire diameter or a stabilizing material of high electric resistance. It can be reduced by dividing it into smaller parts. The third coupling loss is that twisting of the filament is applied to reduce the current loop, a layer of material with high electrical resistance is provided between the filaments, and the outer circumference of the wire is also electrically insulated and twisted together. Be seen.
【０００４】そして、このような変動磁界に対して損失
を低減するように対策された大電流容量の導体では、線
径の細いツイストされた素線を撚り合わせ、さらにこの
撚り合わされた速線束を撚り合わせて多重の撚線構造に
している。In a conductor with a large current capacity, which is designed to reduce the loss with respect to such a fluctuating magnetic field, twisted wires having a small wire diameter are twisted together, and this twisted fast wire bundle is further twisted. They are twisted together to form a multiple stranded wire structure.
【０００５】図４は、従来用いられている撚線構造の超
電導導体の１重撚りの素線の代表例を示す断面図および
斜視図である。図に示す中心のコア１は、ステンレス等
の補強材または超電導線で形成され、この中心のコア１
の外周面に超電導素線２が撚って巻回されている。これ
らのコア１や超電導素線２の外周面には、前述の結合損
失を低減するために絶縁被覆３が施されている。FIG. 4 is a cross-sectional view and a perspective view showing a typical example of a single-stranded wire of a superconducting conductor having a stranded wire structure which has been conventionally used. The central core 1 shown in the figure is formed of a reinforcing material such as stainless steel or a superconducting wire.
The superconducting wire 2 is twisted and wound around the outer peripheral surface of the. An insulating coating 3 is applied to the outer peripheral surfaces of the core 1 and the superconducting wires 2 in order to reduce the above-mentioned coupling loss.
【０００６】このような構成の超電導導体は、電流容量
が比較的小さい場合や結合損失が比較的小さい場合に有
効であるが、電流容量がさらに増大する場合や結合損失
をさらに低減する場合には、図５のように図４に示した
撚線構造導体を複数本集合してさらに撚った撚々線構成
にしている。The superconducting conductor having such a structure is effective when the current capacity is relatively small or the coupling loss is relatively small, but when the current capacity is further increased or the coupling loss is further reduced. As shown in FIG. 5, a plurality of stranded wire structure conductors shown in FIG. 4 are assembled and further twisted to form a stranded wire structure.
【０００７】[0007]
【発明が解決しようとする課題】このような構成の超電
導導体でコイルを製作する際には、超電導導体が通電時
に発生する強大な電磁力により動かないようにする必要
がある。これは超電導導体の動きにより摩擦熱が発生す
るとその熱により超伝導状態を壊す、いわゆるクエンチ
につながるためである。When manufacturing a coil with a superconducting conductor having such a structure, it is necessary to prevent the superconducting conductor from moving due to a strong electromagnetic force generated when electricity is applied. This is because when frictional heat is generated by the movement of the superconducting conductor, the heat destroys the superconducting state, so-called quenching.
【０００８】しかし、細い素線を多重に撚り合わせた構
造の導体では、しっかりした固定ができない。そこで、
従来では素線を多重に撚り合わせた導体を真空加圧含浸
等の処理を施して、素線間の空隙に含浸樹脂を密に充填
して導体を一体化して固定することが行われている。However, a conductor having a structure in which thin wires are twisted in multiple layers cannot be firmly fixed. Therefore,
Conventionally, a conductor in which strands are twisted in multiple layers is subjected to treatment such as vacuum pressure impregnation, and the gap between the strands is densely filled with impregnating resin to integrally fix the conductors. .
【０００９】ところが、素線間の空隙に含浸樹脂を密に
充填して導体を一体化すると、導体内部の素線が液体ヘ
リウム等の冷媒に直接接触せず、外周部からの距離も大
きくなって熱伝導による冷却も悪化するため、かえって
クエンチの発生や回復阻害を引起こしかねない。すなわ
ち、多重撚線型超電導導体では固定強化と冷却強化を同
時に行うことが困難である。However, when the voids between the wires are densely filled with the impregnating resin to integrate the conductors, the wires inside the conductor do not come into direct contact with the coolant such as liquid helium, and the distance from the outer peripheral portion becomes large. Since cooling due to heat conduction also deteriorates, quenching may occur and recovery may be impeded. That is, it is difficult for the multi-strand type superconducting conductor to carry out fixing strengthening and cooling strengthening at the same time.
【００１０】本発明は上記のような問題を解決するため
になされたもので、素線を多重に撚り合わせた導体を強
固に固定でき、素線の冷却も良好な超電導導体を提供す
ることを目的とする。The present invention has been made to solve the above problems, and it is an object of the present invention to provide a superconducting conductor which can firmly fix a conductor obtained by twisting multiple strands of wires and also cools the strands of wire. To aim.
【００１１】[0011]
【課題を解決するための手段】本発明は上記の目的を達
成するため、１重撚りの超電導素線を少なくとも２重に
撚り合せて構成した超電導導体において、前記１重撚り
超電導素線の外周面に半硬化状態の熱硬化型樹脂を施
し、この超電導素線を少なくとも２重に撚り合せた撚線
を加熱硬化して超電導素線間の空隙部及び撚線間に樹脂
を充填して冷媒の連通部を形成したものである。The present invention SUMMARY OF THE INVENTION in order to achieve the above object, in one double twisted superconductor superconducting wire constructed by twisting at least double, the singlet twist
A semi-cured thermosetting resin is applied to the outer peripheral surface of the superconducting element wire.
And twisted at least double the superconducting wires
The resin is cured by heating to cure the voids between superconducting wires and between the twisted wires.
To form a communicating portion of the refrigerant.
【００１２】[0012]
【作用】上記のような手段を講ずることにより、１重撚
りの超電導素線間の空隙部には樹脂が密に充填されてい
るので、導体を強固に固定することができ、また１重撚
りの超電導素線を少なくとも２重に撚り合わせた撚線間
の空隙部には樹脂が粗に充填され、冷媒の入込む連通部
が形成されるので、冷却も良好でクエンチしにくい超電
導導体となし得る。By taking the above means, the resin is densely filled in the voids between the single-twisted superconducting element wires, so that the conductor can be firmly fixed and the single-twisted Since the resin is roughly filled in the voids between the twisted wires in which the superconducting element wires of at least two are twisted, and a communication part for the refrigerant to enter is formed, it is a superconducting conductor that is well cooled and hard to quench. obtain.
【００１３】[0013]
【実施例】以下本発明の実施例を図面を参照して説明す
る。図１および図２は本発明による超電導導体の一実施
例を示し、図１は１重撚りの超電導素線の断面図、図２
は２重撚線とした場合の断面図である。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a superconducting conductor according to the present invention. FIG. 1 is a cross-sectional view of a single-stranded superconducting element wire.
[Fig. 4] is a cross-sectional view in the case of a double-stranded wire.
【００１４】図１において、中心のコア１はステンレス
等の補強材または超電導線で形成されている。この中心
のコア１の外周面に、超電導素線２が撚って巻回されて
いる。そして、コア１および超電導素線２の外周面に
は、総合損失を低減するための絶縁被覆３と半硬化状態
の熱硬化型樹脂層４が施されている。In FIG. 1, the central core 1 is formed of a reinforcing material such as stainless steel or a superconducting wire. The superconducting element wire 2 is twisted and wound around the outer peripheral surface of the central core 1. An insulating coating 3 for reducing the total loss and a thermosetting resin layer 4 in a semi-cured state are provided on the outer peripheral surfaces of the core 1 and the superconducting element wire 2.
【００１５】なお、実際の素線断面は楕円に近い形状で
あるが、図では簡単のため円として示してある。このよ
うな構成の超電導導体を超電導コイルとして巻回して成
形した後、半硬化状態の熱硬化型樹脂を加熱硬化させ
る。この樹脂の加熱硬化過程で、素線外周部の半硬化状
態の熱硬化型樹脂は、一旦液体となり、その後硬化す
る。It should be noted that the actual cross section of the strands has a shape close to an ellipse, but is shown as a circle for simplicity in the figure. After the superconducting conductor having such a structure is wound and formed as a superconducting coil, the semi-cured thermosetting resin is cured by heating. During the heat-curing process of the resin, the thermosetting resin in the semi-cured state on the outer peripheral portion of the wire becomes liquid once and then hardens.
【００１６】この場合、樹脂が液状の状態になると、そ
の樹脂は毛細管現象により１重撚りの超電導素線間の狭
い空隙部に侵入し、密に充填される。そして、１重超電
導素線間の大きな空隙部を密に充填できないように半硬
化状態の熱硬化型樹脂層の厚さを予め設定しておけば、
１重撚超電導線間の大きな空隙部には液状となった樹脂
が粗に充填され、外周部と連通した空隙部が残される。In this case, when the resin is in a liquid state, the resin intrudes into a narrow space between the single-stranded superconducting wires due to a capillary phenomenon and is densely filled. If the thickness of the thermosetting resin layer in the semi-cured state is set in advance so that the large void portion between the single superconducting wires cannot be densely filled,
The large voids between the single-twisted superconducting wires are roughly filled with a liquid resin, leaving voids communicating with the outer peripheral portion.
【００１７】この状態でさらに加熱硬化すれば、図２の
ような１重撚りの超電導素線間の空隙部５１に樹脂４１
が密に充填され、また２重撚りの撚線間の空隙部５２に
は樹脂４１が粗に充填された超電導導体を得ることがで
きる。By further heating and curing in this state, the resin 41 is filled in the gap 51 between the single-stranded superconducting wires as shown in FIG.
It is possible to obtain a superconducting conductor in which the resin 41 is densely filled and the resin portion 41 is roughly filled in the space 52 between the double-stranded twisted wires.
【００１８】このように図１の１重撚りの超電導素線を
図２に示すように２重撚線として超電導導体を構成すれ
ば、１重撚りの超電導素線の空隙部５１に樹脂４１が密
に充填されているため、１重撚線が強固に一体化し、導
体を固定する際の圧力に対して素線がバラバラに崩れる
ようなことはない。また、１重撚線間も素に充填された
樹脂により固定されるので、導体としても前述した圧力
に対して崩れることはない。As described above, when the superconducting conductor is constructed by using the single-stranded superconducting element wire of FIG. 1 as the double-stranded wire as shown in FIG. 2, the resin 41 is filled in the void 51 of the single-stranded superconducting element wire. Since they are densely packed, the single-stranded wire is firmly integrated, and the wires do not fall apart due to the pressure when fixing the conductor. Further, since the space between the single stranded wires is fixed by the resin filled in the element, the conductor does not collapse due to the above-mentioned pressure.
【００１９】さらに、１重撚線間には連通した空隙部５
２が形成されているので、この空隙部に液体ヘリウム等
の冷媒が入込むことによりほとんどの超電導素線に冷媒
が接触することになり、十分な冷却が行える。また、１
重撚線の中心部のコアもおおむね素線１本分の距離を介
して冷媒と熱交換が可能であり、良好な冷却特性を得る
ことができる。Further, the void portion 5 which is communicated between the single stranded wires
Since 2 is formed, when a coolant such as liquid helium enters the void, the coolant comes into contact with most of the superconducting element wires, and sufficient cooling can be performed. Also, 1
The core at the center of the heavy-stranded wire can also exchange heat with the refrigerant over a distance of about one strand, and good cooling characteristics can be obtained.
【００２０】次に本発明の他の実施例について説明す
る。図３は本発明の超電導導体の他の実施例における１
重撚りの素線を示す断面図である。Next, another embodiment of the present invention will be described. FIG. 3 shows a first embodiment of another embodiment of the superconducting conductor of the present invention.
It is sectional drawing which shows the strand of heavy twist.
【００２１】図３において、中心コア１は、ステンレス
等の補強材または超電導線で形成され、この中心のコア
１の外周面に超電導素線２が撚って巻回されている。こ
のコア１の外周面には前記実施例と同様に絶縁被覆３と
半硬化状態の熱硬化型重視層４が施される。この場合、
６本の超電導素線２の内３本の素線の外周面に対しての
み半硬化状態の熱硬化型重視層４が施される。In FIG. 3, the central core 1 is formed of a reinforcing material such as stainless steel or a superconducting wire, and the superconducting element wire 2 is twisted and wound around the outer peripheral surface of the central core 1. An insulating coating 3 and a semi-cured thermosetting type important layer 4 are applied to the outer peripheral surface of the core 1 as in the above-described embodiment. in this case,
The thermosetting type important layer 4 in the semi-cured state is applied only to the outer peripheral surfaces of the three wires of the six superconducting wires 2.
【００２２】このような構成の超電導導体を超電導コイ
ルとして巻回して成形した後、半硬化状態の熱硬化型樹
脂を加熱硬化させると、前述した実施例と同様に図２に
示すような１重撚りの超電導素線間の空隙部に樹脂が密
に充填され、２重撚りの素線間の空隙部には樹脂が粗に
充填された超電導導体が得られる。After the superconducting conductor having such a structure is wound and formed as a superconducting coil, and then the thermosetting resin in the semi-cured state is cured by heating, a single layer as shown in FIG. It is possible to obtain a superconducting conductor in which the voids between the twisted superconducting wires are densely filled with the resin and the voids between the double-twisted wires are roughly filled with the resin.
【００２３】上記実施例の超電導導体においては、前述
した実施例と同様に半硬化状態の熱硬化型樹脂量を、樹
脂層の厚さとともに樹脂層を持つ素線の本数に応じて調
整することが可能となり、空隙に充填する樹脂量の調整
をより簡単になし得るという効果がある。In the superconducting conductor of the above-mentioned embodiment, the amount of the thermosetting resin in the semi-cured state is adjusted in accordance with the thickness of the resin layer and the number of strands having the resin layer, as in the above-mentioned embodiment. It is possible to adjust the amount of resin filled in the voids more easily.
【００２４】なお、本発明は上述した各実施例に限定さ
れるものではなく、例えばコアにのみ半硬化状態の熱硬
化型樹脂層を設ける等、その要旨を変更しない範囲で種
々変形して実施できることは勿論である。The present invention is not limited to the above-mentioned embodiments, and various modifications may be made without changing the scope of the invention, for example, by providing a thermosetting resin layer in a semi-cured state only on the core. Of course you can.
【００２５】[0025]
【発明の効果】以上述べたように本発明によれば、１重
撚りの超電導素線間の空隙部に樹脂を密に充填し、且つ
前記少なくとも２重に撚り合わせた撚線間の空隙部に樹
脂を粗に充填して導体を構成するようにしたので、素線
を多重に撚り合わせた導体を強固に固定できると共に、
冷却も良好になし得る超電導導体を提供することができ
る。As described above, according to the present invention, the voids between the single-twisted superconducting wires are densely filled with resin, and the voids between the twisted wires that are twisted at least twice are provided. Since the resin is roughly filled in to form the conductor, it is possible to firmly fix the conductor in which the strands are twisted in multiple layers,
It is possible to provide a superconducting conductor that can be cooled well.
【図１】本発明による超電導導体の一実施例における１
重撚りの超電導素線を示す断面図。FIG. 1 is a view showing one example of a superconducting conductor according to the present invention.
Sectional drawing which shows the superconducting element wire of heavy twist.
【図２】同実施例において、２重撚線とした超電導導体
を示す断面図。FIG. 2 is a cross-sectional view showing a superconducting conductor having a double stranded wire in the example.
【図３】本発明の他の実施例における１重撚りの超電導
素線を示す断面図。FIG. 3 is a sectional view showing a single-stranded superconducting wire according to another embodiment of the present invention.
【図４】従来の撚線構造の超電導導体を示す断面図。FIG. 4 is a cross-sectional view showing a conventional superconducting conductor having a stranded wire structure.
【図５】同じく超電導導体の斜視図。FIG. 5 is a perspective view of the superconducting conductor.
１…コア、２…超電導素線、３…絶縁被覆、４…半硬化
状態の熱硬化型樹脂層、４１…熱硬化型樹脂、５１…超
電導素線間の空隙部、５２…２重撚りの撚線間の空隙
部。DESCRIPTION OF SYMBOLS 1 ... Core, 2 ... Superconducting element wire, 3 ... Insulating coating, 4 ... Thermosetting resin layer in a semi-cured state, 41 ... Thermosetting resin, 51 ... Void part between superconducting element wires, 52 ... Double twist Gap between stranded wires.
Claims (2)
に撚り合せて構成した超電導導体において、前記１重撚
り超電導素線の外周面に半硬化状態の熱硬化型樹脂を施
し、この超電導素線を少なくとも２重に撚り合せた撚線
を加熱硬化して超電導素線間の空隙部及び撚線間に樹脂
を充填して冷媒の連通部を形成したことを特徴とする超
電導導体。1. A superconducting conductor formed by twisting at least double a single-twisted superconducting element wire, wherein a semi-cured thermosetting resin is applied to an outer peripheral surface of the single-twisted superconducting element wire. A superconducting conductor, characterized in that a twisted wire obtained by twisting wires at least twice is heat-cured to fill voids between superconducting wires and a resin between the twisted wires to form a communicating portion of a refrigerant.
に撚り合せて構成した超電導導体において、外周面に半
硬化状態の熱硬化型樹脂を施した超電導素線と外周面に
半硬化状態の熱硬化型樹脂が施されていない超電導素線
とで１重撚りの超電導素線を構成し、この超電導素線を
少なくとも２重に撚り合せた撚線を加熱硬化して超電導
素線間の空隙部及び撚線間に樹脂を充填して冷媒の連通
部を形成したことを特徴とする超電導導体。2. A superconducting conductor formed by twisting a single-stranded superconducting element wire into at least two layers, and a superconducting element wire having a semi-cured thermosetting resin on the outer peripheral surface and a semi-cured state on the outer peripheral surface. Between the superconducting element wire and the superconducting element wire which is not treated with the thermosetting resin, the single-twisted superconducting element wire is formed. A superconducting conductor, characterized in that a resin communication portion is formed by filling a resin between the void and the twisted wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29783693A JP3426671B2 (en) | 1993-11-29 | 1993-11-29 | Superconducting conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29783693A JP3426671B2 (en) | 1993-11-29 | 1993-11-29 | Superconducting conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07153331A JPH07153331A (en) | 1995-06-16 |
| JP3426671B2 true JP3426671B2 (en) | 2003-07-14 |
Family
ID=17851788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29783693A Expired - Lifetime JP3426671B2 (en) | 1993-11-29 | 1993-11-29 | Superconducting conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3426671B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4774494B2 (en) * | 2005-01-14 | 2011-09-14 | 成卓 岩熊 | Superconducting coil |
-
1993
- 1993-11-29 JP JP29783693A patent/JP3426671B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07153331A (en) | 1995-06-16 |
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