JP2011018536A - Connection structure of superconducting wire rod and superconducting coil device - Google Patents

Connection structure of superconducting wire rod and superconducting coil device Download PDF

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JP2011018536A
JP2011018536A JP2009161983A JP2009161983A JP2011018536A JP 2011018536 A JP2011018536 A JP 2011018536A JP 2009161983 A JP2009161983 A JP 2009161983A JP 2009161983 A JP2009161983 A JP 2009161983A JP 2011018536 A JP2011018536 A JP 2011018536A
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superconducting
superconducting wire
wire
superconducting coil
coil
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JP5268805B2 (en
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Sadanori Iwai
貞憲 岩井
Taizo Tosaka
泰造 戸坂
Kenji Tazaki
賢司 田崎
Michitaka Ono
通隆 小野
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Toshiba Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of superconducting wire rods low in electric resistance at wire rod ends and short in connection length when using the superconducting wire rods reinforced with a high electric resistance material, and a superconducting coil device having the same.SOLUTION: In the connection structure of the superconducting wire rods, a part of a first superconducting wire rod 1 reinforced with the high electric resistance material and at least a part of a second superconducting wire rod 2 reinforced with a low electric resistance material are jointed with each other in an overlapped state, and they are electrically connected to each other through a jointing part 3.

Description

本発明は、超電導線材の接続構造およびそれを有する超電導コイル装置に関する。   The present invention relates to a superconducting wire connecting structure and a superconducting coil device having the same.

一般に、超電導コイルは、例えば磁気共鳴画像診断装置（ＭＲＩ）や、超電導磁気エネルギー貯蔵装置（ＳＭＥＳ）などの種々の用途に用いることができる。大型の超電導コイルを作製する場合には、数十ｋｍ〜数百ｋｍの長さの超電導線材が必要になる場合がある。しかしながら、継ぎ目のない１本の単長の超電導線材でこのような長さを実現することは、超電導線材の製造の観点から難しい場合が多い。高温超電導線材（特に基板上に高温超電導層が形成された薄膜線材）の場合、例えば次世代のイットリウム系超電導線材においては、まだ１ｋｍ長程度が最長であり、数ｋｍ〜数十ｋｍの長さの線材の製造には至っていない。   In general, the superconducting coil can be used in various applications such as a magnetic resonance imaging diagnostic apparatus (MRI) and a superconducting magnetic energy storage apparatus (SMES). When producing a large superconducting coil, a superconducting wire having a length of several tens to several hundreds of kilometers may be required. However, it is often difficult to realize such a length with a single seamless superconducting wire that is seamless from the viewpoint of manufacturing the superconducting wire. In the case of a high-temperature superconducting wire (especially a thin-film wire having a high-temperature superconducting layer formed on a substrate), for example, in the next-generation yttrium-based superconducting wire, the length is still about 1 km, which is several kilometers to several tens of kilometers No wire has been produced.

したがって、超電導コイルを製作する上では、超電導線材同士を電気的に接続することが必要であり、そのための技術は重要である。超電導線材同士の接続部における電気抵抗を極力小さくするためには、例えば特許文献１記載の発明のように、超電導薄膜層同士を直接接触させ、接触面の周囲に同種の超電導薄膜を堆積させる方法がある。   Therefore, in manufacturing the superconducting coil, it is necessary to electrically connect the superconducting wires to each other, and the technology for that is important. In order to reduce the electrical resistance at the connection between the superconducting wires as much as possible, for example, as in the invention described in Patent Document 1, the superconducting thin film layers are brought into direct contact with each other and the same kind of superconducting thin film is deposited around the contact surface. There is.

しかしながら、特許文献１記載の発明は、低抵抗接続ができるものの、接続プロセスがはんだ付けなどの接続方法と比較すると格段にコストがかかる。さらに、高い強度の超電導線材を必要とする大型の超電導コイルの製作で、例えばステンレスのような高強度高電気抵抗材で補強した超電導線材を使用する場合、特許文献１記載の発明では接続箇所で高電気抵抗材を剥がさなければならない上に接続作業に時間がかかる。   However, although the invention described in Patent Document 1 enables low resistance connection, the connection process is significantly more expensive than a connection method such as soldering. Furthermore, when a superconducting wire reinforced with a high-strength, high-electric resistance material such as stainless steel is used in the production of a large superconducting coil that requires a high-strength superconducting wire, the invention described in Patent Document 1 uses a connection point at the connection location. The high electrical resistance material must be peeled off and the connection work takes time.

一方、はんだ付けによる接続は簡便であるものの、接続部に電流が流れる際に電気抵抗の大きい高電気抵抗材を通過する必要があることから、接続部での電気抵抗が小さくなるように接続部の長さ（接続長）を長くせざるを得ない。また、超電導線材同士を接続する場合だけでなく、超電導線材と導電性のテープや電極などとを接続する場合にも、同様な問題が生じる。   On the other hand, although the connection by soldering is simple, it is necessary to pass through a high electrical resistance material having a large electrical resistance when current flows through the connection part, so that the connection part has a small electrical resistance at the connection part. The length of the connection (connection length) must be increased. Similar problems arise not only when connecting superconducting wires, but also when connecting superconducting wires and conductive tapes, electrodes, and the like.

特開２００５−６３６９５号公報JP 2005-63695 A

一般に、高電気抵抗材で補強した超電導線材を使用する場合、線材端部で電気的に接続する際に電流は高電気抵抗材を通過する必要があることから、接続部での電気抵抗が小さくなるように接続長を長くせざるを得ない。例えば、超電導線材で巻線するコイルの場合、コイル端部では、巻線した超電導線材を電極に接続するのが一般的である。ここで、上述した高電気抵抗材で補強した超電導線材を用いてコイル巻線を行う場合に、接続部での電気抵抗を小さくするためには、接続長を大きくする必要があり、その結果、大きな電極を用いなければならない。また、コイル構成によっては、大きな電極を設置できず、接続部での電気抵抗を小さくすることができないなどの問題が生じる可能性もある。   In general, when using a superconducting wire reinforced with a high electrical resistance material, the current must pass through the high electrical resistance material when electrically connecting at the end of the wire. Therefore, the connection length must be increased. For example, in the case of a coil wound with a superconducting wire, it is common to connect the wound superconducting wire to an electrode at the coil end. Here, when performing coil winding using the superconducting wire reinforced with the above-described high electrical resistance material, in order to reduce the electrical resistance at the connection portion, it is necessary to increase the connection length. Large electrodes must be used. In addition, depending on the coil configuration, there may be a problem that a large electrode cannot be installed and the electrical resistance at the connection portion cannot be reduced.

本発明は上記実情に鑑みてなされたものであり、高電気抵抗材で補強した超電導線材を使用する際に線材端部での電気抵抗が低く且つ接続長を短くすることのできる超電導線材の接続構造およびそれを有する超電導コイル装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and when using a superconducting wire reinforced with a high electric resistance material, the connection of the superconducting wire which has a low electric resistance at the end of the wire and can shorten the connection length An object is to provide a structure and a superconducting coil device having the structure.

本発明の一態様による超電導線材の接続構造は、高電気抵抗材で補強された第１の超電導線材の一部と低電気抵抗材で補強された第２の超電導線材の少なくとも一部とが重なるように接合され、かつ、接合部を通じて電気的に接続されることを特徴とする。   In the superconducting wire connection structure according to one aspect of the present invention, a part of the first superconducting wire reinforced with a high electrical resistance material and at least a part of the second superconducting wire reinforced with a low electrical resistance material overlap. And is electrically connected through the joint.

本発明によれば、高電気抵抗材で補強した超電導線材を使用する際に線材端部での電気抵抗が低く且つ接続長を短くすることのできる超電導線材の接続構造およびそれを有する超電導コイル装置を提供することができる。   According to the present invention, when a superconducting wire reinforced with a high electrical resistance material is used, the connection structure of the superconducting wire that can reduce the electrical resistance at the end of the wire and shorten the connection length, and a superconducting coil device having the same Can be provided.

図１は、本発明の第１の実施形態に係る超電導線材の接続構造の一例を示す断面図。FIG. 1 is a cross-sectional view showing an example of a superconducting wire connection structure according to a first embodiment of the present invention. 図２は、本発明の第２の実施形態に係る超電導線材の接続構造を示す断面図。FIG. 2 is a cross-sectional view showing a superconducting wire connection structure according to a second embodiment of the present invention. 図３（ａ），（ｂ）は、図２に示される超電導線材を巻線した超電導コイルを有するシングルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図。FIGS. 3A and 3B are a plan sectional view and a side view showing a schematic configuration of a single pancake-shaped superconducting coil device having a superconducting coil wound with the superconducting wire shown in FIG. 図４は、本発明の第３の実施形態に係る超電導線材の接続構造を示す断面図。FIG. 4 is a cross-sectional view showing a superconducting wire connecting structure according to a third embodiment of the present invention. 図５（ａ），（ｂ）は、本発明の第４の実施形態に係る超電導線材を巻線した超電導コイルを有するダブルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図。FIGS. 5A and 5B are a plan sectional view and a side view showing a schematic configuration of a double pancake-shaped superconducting coil device having a superconducting coil wound with a superconducting wire according to a fourth embodiment of the present invention. . 図６（ａ），（ｂ）は、本発明の第５の実施形態に係る超電導線材を巻線した超電導コイルを有するダブルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図。6 (a) and 6 (b) are a plan view and a side view showing a schematic configuration of a double pancake-shaped superconducting coil device having a superconducting coil wound with a superconducting wire according to a fifth embodiment of the present invention. . 図７（ａ），（ｂ）は、本発明の第６の実施形態に係る超電導線材を巻線した超電導コイルを有するダブルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図。FIGS. 7A and 7B are a plan sectional view and a side view showing a schematic configuration of a double pancake-shaped superconducting coil device having a superconducting coil wound with a superconducting wire according to a sixth embodiment of the present invention. . 図８は、本発明の第７の実施形態に係る超電導線材の接続構造を示す要部拡大断面図。FIG. 8: is a principal part expanded sectional view which shows the connection structure of the superconducting wire which concerns on the 7th Embodiment of this invention. 図９は、本発明の第８の実施形態に係る超電導線材の接続構造を示す要部拡大断面図。FIG. 9 is an enlarged cross-sectional view showing a main part of a superconducting wire connection structure according to an eighth embodiment of the present invention. 図１０は、同実施形態に係る超電導線材の別の接続構造を示す要部拡大断面図。FIG. 10 is an enlarged cross-sectional view of a main part showing another connection structure of the superconducting wire according to the embodiment.

以下、図面を参照して、本発明の実施の形態について説明する。   Embodiments of the present invention will be described below with reference to the drawings.

なお、本明細書でいう高電気抵抗材とは、液体窒素温度（７７．３Ｋ）で１×１０−７（Ωｍ）以上の電気抵抗率を持つ部材を指し、例えばステンレスやＮｉ−Ｆｅ合金のように強度が高い材料が挙げられる。また、本明細書でいう低電気抵抗材とは、同じ液体窒素温度で１×１０−９（Ωｍ）未満の電気抵抗率を持つ部材を指し、例えば銀や銅が挙げられる。このような低電気抵抗材は機械強度が低い場合が多い。 The high electrical resistance material referred to in this specification refers to a member having an electrical resistivity of 1 × 10 −7 (Ωm) or more at a liquid nitrogen temperature (77.3 K), such as stainless steel or Ni—Fe alloy. Such a material having high strength can be mentioned. Moreover, the low electrical resistance material referred to in this specification refers to a member having an electrical resistivity of less than 1 × 10 −9 (Ωm) at the same liquid nitrogen temperature, and examples thereof include silver and copper. Such low electrical resistance materials often have low mechanical strength.

（第１の実施形態）
最初に、図１を参照して、本発明の第１の実施形態について説明する。 (First embodiment)
First, a first embodiment of the present invention will be described with reference to FIG.

図１は、本発明の第１の実施形態に係る超電導線材の接続構造の一例を示す断面図である。   FIG. 1 is a sectional view showing an example of a superconducting wire connection structure according to the first embodiment of the present invention.

図１には、高電気抵抗材で補強された超電導線材１（以下、「第１の超電導線材１」と称す）の一部と、この高電気抵抗材より電気抵抗が低い低電気抵抗材で補強された超電導線材２（以下、「第２の超電導線材２」と称す）の一部とが重なるように接合部３にて接合され、かつ、接合部３を通じて電気的に接続される超電導線材の接続構造が示されている。   FIG. 1 shows a part of a superconducting wire 1 reinforced with a high electrical resistance material (hereinafter referred to as “first superconducting wire 1”) and a low electrical resistance material having an electrical resistance lower than that of the high electrical resistance material. A superconducting wire that is joined at the joint 3 so that a part of the reinforced superconducting wire 2 (hereinafter referred to as “second superconducting wire 2”) overlaps and is electrically connected through the joint 3. The connection structure is shown.

第１の超電導線材１は、高電気抵抗材１ａ，超電導線材１ｂ，および高電気抵抗材１ｃにより構成され、超電導線材１ｂを高電気抵抗材１ａ，１ｃで挟み込んだ構造を有する。一方、第２の超電導線材２は、低電気抵抗材２ａ，超電導線材２ｂ，および低電気抵抗材２ｃにより構成され、超電導線材２ｂを低電気抵抗材２ａ，２ｃで挟み込んだ構造を有する。   The first superconducting wire 1 is composed of a high electrical resistance material 1a, a superconducting wire 1b, and a high electrical resistance material 1c, and has a structure in which the superconducting wire 1b is sandwiched between the high electrical resistance materials 1a and 1c. On the other hand, the second superconducting wire 2 is composed of a low electrical resistance material 2a, a superconducting wire 2b, and a low electrical resistance material 2c, and has a structure in which the superconducting wire 2b is sandwiched between the low electrical resistance materials 2a and 2c.

このような構造を実現するには、図１に示されるように第１の超電導線材１の端部と第２の超電導線材２の端部とを線材長手方向にラップさせ、ラップした面をはんだ付けやロウ付けなどの方法により接合部３によって接合する。このとき、接合面の面積は、所望の電気抵抗値に応じて決定する。接合には、はんだ付けやロウ付けのほか、拡散接合などの電気的接続方法を採用してもよい。はんだ付けを採用する場合、高電気抵抗材１ｃの端部と低電気抵抗材２ｃの端部とが、はんだである接合部３を挟んで対向するように配置し、加熱することによりはんだを溶融させて接続する。   In order to realize such a structure, as shown in FIG. 1, the end of the first superconducting wire 1 and the end of the second superconducting wire 2 are wrapped in the longitudinal direction of the wire, and the wrapped surface is soldered. It joins by the junction part 3 by methods, such as brazing and brazing. At this time, the area of the joint surface is determined according to a desired electric resistance value. For the joining, in addition to soldering and brazing, an electrical connection method such as diffusion joining may be employed. When soldering is used, the end of the high electrical resistance material 1c and the end of the low electrical resistance material 2c are arranged so as to face each other with the joint 3 being solder interposed therebetween, and the solder is melted by heating. Let it connect.

上記構成において、第１の超電導線材１において電流を図１中の右側から左側へ流すと、電流は第１の超電導線材１から接合部３を介して第２の超電導線材２へと流れ込むことになる。   In the above configuration, when a current flows from the right side to the left side in FIG. 1 in the first superconducting wire 1, the current flows from the first superconducting wire 1 to the second superconducting wire 2 via the joint 3. Become.

この第１の実施形態によれば、高電気抵抗材で補強されている第１の超電導線材１に、低電気抵抗材で補強されている第２の超電導線材２を接続することにより、超電導線材端部での低抵抗接続が可能となり、また、接続長を短くすることが可能となる。   According to the first embodiment, the superconducting wire is connected by connecting the second superconducting wire 2 reinforced with a low electrical resistance material to the first superconducting wire 1 reinforced with a high electrical resistance material. Low resistance connection at the end is possible, and the connection length can be shortened.

（第２の実施形態）
次に、図２および図３を参照して、本発明の第２の実施形態について説明する。 (Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS.

この第２の実施形態においては、前述の図１の構成と共通する部分には同一の符号を付し、重複する説明を省略する。以下では、図１の構成と異なる部分を中心に説明する。   In the second embodiment, parts that are the same as those in the configuration of FIG. 1 described above are given the same reference numerals, and redundant descriptions are omitted. Below, it demonstrates centering on a different part from the structure of FIG.

図２は、本発明の第２の実施形態に係る超電導線材の接続構造を示す断面図である。また、図３は、図２に示される超電導線材を巻線した超電導コイルを有するシングルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図である。図３中、（ａ）は超電導コイル装置を軸方向から見た場合の概略構成を示し、（ｂ）は超電導コイル装置を軸方向に垂直な方向から見た場合の概略構成を示している。   FIG. 2 is a cross-sectional view showing a superconducting wire connection structure according to a second embodiment of the present invention. FIG. 3 is a plan sectional view and a side view showing a schematic configuration of a single pancake-shaped superconducting coil device having a superconducting coil wound with the superconducting wire shown in FIG. 3A shows a schematic configuration when the superconducting coil device is viewed from the axial direction, and FIG. 3B shows a schematic configuration when the superconducting coil device is viewed from the direction perpendicular to the axial direction.

図２には、第１の超電導線材１の一部と第２の超電導線材２とが重なるように接合部３にて接合され、さらに第２の超電導線材２の一部と金属製の電極４とが別の接合部３にて接合され、かつ、二つの接合部３を通じて第１の超電導線材１と第２の超電導線材２と電極４とが電気的に接続される超電導線材の接続構造が示されている。   In FIG. 2, a part of the first superconducting wire 1 and the second superconducting wire 2 are joined at the joint 3 so as to overlap each other, and a part of the second superconducting wire 2 and the metal electrode 4 are joined. And a connection structure of superconducting wires in which the first superconducting wire 1, the second superconducting wire 2, and the electrode 4 are electrically connected through the two joining portions 3. It is shown.

このような構造を実現するには、図２に示されるように第１の超電導線材１の端部と第２の超電導線材２とを線材長手方向にラップさせ、ラップした面をはんだ付けやロウ付けなどの方法により接合すると共に、第２の超電導線材２と電極４とを線材長手方向にラップさせ、ラップした面をはんだ付けやロウ付けなどの方法により接合する。それぞれの接合には、前述の第１の実施形態で説明した手法を採用する。   In order to realize such a structure, as shown in FIG. 2, the end of the first superconducting wire 1 and the second superconducting wire 2 are wrapped in the longitudinal direction of the wire, and the wrapped surface is soldered or brazed. The second superconducting wire 2 and the electrode 4 are wrapped in the longitudinal direction of the wire, and the wrapped surfaces are joined by a method such as soldering or brazing. For each joining, the method described in the first embodiment is employed.

なお、上記電極４は、後述するコイル巻枠５に取り付けられるものである。第２の超電導線材２と電極４との接合は、電極４がコイル巻枠５に取り付けられた状態で行ってもよいが、第２の超電導線材２と電極４との接合を行ってから、電極４をコイル巻枠５に取り付けるようにしてもよい。   In addition, the said electrode 4 is attached to the coil winding frame 5 mentioned later. The joining of the second superconducting wire 2 and the electrode 4 may be performed in a state where the electrode 4 is attached to the coil winding frame 5, but after joining the second superconducting wire 2 and the electrode 4, The electrode 4 may be attached to the coil winding frame 5.

図３には、絶縁物で構成されたコイル巻枠５に沿って図２の超電導線材が巻線された一段の超電導コイル２０を有する超電導コイル装置が示されている。本実施形態では、超電導コイル２０の最内層に第２の超電導線材２が配置されるようにしている。この第２の超電導線材２は電極４に電気的に接続されており、電極４はコイル巻枠５に取り付けられている。電極４は、コイル巻枠５の外径と同じ径の弧を有するものとする。   FIG. 3 shows a superconducting coil device having a single superconducting coil 20 in which the superconducting wire of FIG. 2 is wound along a coil frame 5 made of an insulator. In the present embodiment, the second superconducting wire 2 is arranged in the innermost layer of the superconducting coil 20. The second superconducting wire 2 is electrically connected to the electrode 4, and the electrode 4 is attached to the coil winding frame 5. The electrode 4 has an arc having the same diameter as the outer diameter of the coil winding frame 5.

超電導コイル２０の製作では、内周側の電極４の位置から第２の超電導線材２をコイル巻枠５に沿って巻き、第１の超電導線材１と第２の超電導線材２との間の接合部３をコイル内部に巻き込みつつ、第１の超電導線材１を外周側へ向けて巻き回す。   In the production of the superconducting coil 20, the second superconducting wire 2 is wound along the coil winding frame 5 from the position of the electrode 4 on the inner peripheral side, and the joining between the first superconducting wire 1 and the second superconducting wire 2 is performed. The first superconducting wire 1 is wound toward the outer peripheral side while the part 3 is wound inside the coil.

上記構成においては、第２の超電導線材２と電極４との間の接合部３は、接続する両部材とも電気抵抗が低いため、比較的短い接続長でも低い電気抵抗が得られる。幅４ｍｍの超電導線材と銅で構成した電極とを、長さ１００ｍｍに亘って接続した試料を、２０Ｋに冷却して接合部での電気抵抗を測った結果、２０ナノオームの電気抵抗が得られた。   In the above configuration, since the joint 3 between the second superconducting wire 2 and the electrode 4 has low electrical resistance for both members to be connected, low electrical resistance can be obtained even with a relatively short connection length. A sample in which a superconducting wire having a width of 4 mm and an electrode made of copper were connected over a length of 100 mm was cooled to 20K, and the electrical resistance at the joint was measured. As a result, an electrical resistance of 20 nanoohms was obtained. .

仮に、超電導コイル２０の最内層に第２の超電導線材２を配置せずに第１の超電導線材１を配置し、第１の超電導線材１と電極４とを接続する場合には、高電気抵抗材の電気抵抗の値にも依るが、長い電極を準備する必要がある。例えば、接合部の単位長さ当たりの電気抵抗が１０倍大きくなれば、電極は１０倍の長さが必要となる。コイルの内径が小さい場合は、十分な電極長を確保できない可能性もある。本実施形態ではこのようなことを考慮し、超電導コイル２０の最内層に第１の超電導線材１ではなく第２の超電導線材２を配置し、第２の超電導線材２を電極４に接続するようにしている。   If the first superconducting wire 1 is arranged without arranging the second superconducting wire 2 in the innermost layer of the superconducting coil 20 and the first superconducting wire 1 and the electrode 4 are connected, a high electric resistance is required. Depending on the value of the electrical resistance of the material, it is necessary to prepare a long electrode. For example, if the electrical resistance per unit length of the joint becomes 10 times larger, the electrode needs to be 10 times longer. When the inner diameter of the coil is small, there is a possibility that a sufficient electrode length cannot be secured. In the present embodiment, in consideration of such a situation, the second superconducting wire 2 is arranged in the innermost layer of the superconducting coil 20 instead of the first superconducting wire 1, and the second superconducting wire 2 is connected to the electrode 4. I have to.

この第２の実施形態によれば、低電気抵抗材で補強されている第２の超電導線材２と電極４との間の接合部３は、接続する両部材とも電気抵抗が低いため、比較的短い接続長でも低い電気抵抗が得られ、電極４の長さを短く構成することが可能となる。   According to the second embodiment, the joint 3 between the second superconducting wire 2 reinforced with a low electrical resistance material and the electrode 4 has a relatively low electrical resistance for both members to be connected. A low electrical resistance can be obtained even with a short connection length, and the length of the electrode 4 can be reduced.

（第３の実施形態）
次に、図４を参照して、本発明の第３の実施形態について説明する。 (Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.

この第３の実施形態においては、前述の図２の構成と共通する部分には同一の符号を付し、重複する説明を省略する。以下では、図２の構成と異なる部分を中心に説明する。   In the third embodiment, parts that are the same as those in the configuration of FIG. 2 described above are given the same reference numerals, and redundant descriptions are omitted. Below, it demonstrates centering on a different part from the structure of FIG.

図４は、本発明の第３の実施形態に係る超電導線材の接続構造を示す断面図である。なお、当該超電導線材の接続構造を含む超電導コイル装置の構成については、図３とほぼ同様となるため、その図示を省略する。   FIG. 4 is a cross-sectional view showing a superconducting wire connection structure according to a third embodiment of the present invention. In addition, about the structure of the superconducting coil apparatus including the connection structure of the said superconducting wire, since it becomes substantially the same as FIG. 3, the illustration is abbreviate | omitted.

この第３の実施形態に係る超電導線材の接続構造は、前述の図２に示される構成に加え、少なくとも第１の超電導線材１の一部を電極４の一部に機械的に固定する接続部６を備えたものとなっている。図４の例では、接続部６によって、当該接続部６と第１の超電導線材１と第２の超電導線材２と二つの接合部３と電極４とが一体として固定されている。接続部６は、例えばねじ止めや溶接などにより実現される。   The connection structure of the superconducting wire according to the third embodiment is a connecting portion for mechanically fixing at least a part of the first superconducting wire 1 to a part of the electrode 4 in addition to the structure shown in FIG. 6 is provided. In the example of FIG. 4, the connecting portion 6, the first superconducting wire 1, the second superconducting wire 2, the two joint portions 3, and the electrode 4 are fixed integrally. The connecting portion 6 is realized by, for example, screwing or welding.

上記構成においては、接続部６が少なくとも第１の超電導線材１の一部を電極４の一部に機械的に固定しているため、機械強度が大きい。   In the above configuration, since the connecting portion 6 mechanically fixes at least a part of the first superconducting wire 1 to a part of the electrode 4, the mechanical strength is high.

この第３の実施形態によれば、機械強度が比較的小さい低電気抵抗材で補強された第２の超電導線材２が破断した場合であっても、機械強度が比較的大きい高電気抵抗材で補強された第１の超電導線材１の一部が接続部６によって電極４の一部に機械的に固定されているため、機械強度が大きく、通電中に開回路が形成されることを防ぐことができる。   According to the third embodiment, even when the second superconducting wire 2 reinforced with the low electrical resistance material having a relatively low mechanical strength is broken, the high electrical resistance material having a relatively high mechanical strength is used. Since a part of the reinforced first superconducting wire 1 is mechanically fixed to a part of the electrode 4 by the connection portion 6, the mechanical strength is high and the formation of an open circuit during energization is prevented. Can do.

（第４の実施形態）
次に、図５を参照して、本発明の第４の実施形態について説明する。 (Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG.

この第４の実施形態に係る超電導線材の接続構造は、図１に示されるものと同じである。図５は、本発明の第４の実施形態に係る超電導線材を巻線した超電導コイルを有するダブルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図である。図５中、（ａ）は超電導コイル装置を軸方向から見た場合の概略構成を示し、（ｂ）は超電導コイル装置を軸方向に垂直な方向から見た場合の概略構成を示している。   The connection structure of the superconducting wire according to the fourth embodiment is the same as that shown in FIG. FIG. 5 is a plan sectional view and a side view showing a schematic configuration of a double pancake-shaped superconducting coil device having a superconducting coil wound with a superconducting wire according to a fourth embodiment of the present invention. 5A shows a schematic configuration when the superconducting coil device is viewed from the axial direction, and FIG. 5B shows a schematic configuration when the superconducting coil device is viewed from the direction perpendicular to the axial direction.

図５には、第１の超電導コイル７ａおよび第２の超電導コイル７ｂの二段構成を含む超電導コイル装置が示されている。なお、図５では、コイル巻枠５の図示を省略している。二つの超電導コイル７ａ，７ｂは、それぞれ、図１に示される超電導線材の接続構造を有する。   FIG. 5 shows a superconducting coil device including a two-stage configuration of a first superconducting coil 7a and a second superconducting coil 7b. In addition, illustration of the coil winding frame 5 is abbreviate | omitted in FIG. Each of the two superconducting coils 7a and 7b has a superconducting wire connecting structure shown in FIG.

本実施形態では、超電導コイル７ａ，７ｂの最内層に第２の超電導線材２がそれぞれ配置され、それぞれの第２の超電導線材２の端部を延長させる超電導線材８ａ，８ｂが導電性の渡り部９を介して互いに電気的に接続される。渡り部９は、はんだ付けやロウ付けなどの接合部３により実現される。   In the present embodiment, the second superconducting wire 2 is disposed in the innermost layer of the superconducting coils 7a and 7b, and the superconducting wires 8a and 8b that extend the ends of the respective second superconducting wires 2 are electrically conductive connecting portions. 9 are electrically connected to each other. The crossover portion 9 is realized by the joint portion 3 such as soldering or brazing.

超電導線材８ａは、超電導コイル７ａの最内層に位置する第２の超電導線材２の端部を延長させるものであり、一方、超電導線材８ｂは、超電導コイル７ｂの最内層に位置する第２の超電導線材２の端部を延長させるものである。これらの超電導線材８ａ，８ｂは、互いにコイル中心を挟んで対向する最内層の位置から引き出されており、コイル中央部にて渡り部９により接合されている。   The superconducting wire 8a extends the end of the second superconducting wire 2 located in the innermost layer of the superconducting coil 7a, while the superconducting wire 8b is the second superconducting wire located in the innermost layer of the superconducting coil 7b. The end of the wire 2 is extended. These superconducting wires 8a and 8b are drawn from the position of the innermost layer facing each other across the coil center, and are joined by a crossover 9 at the center of the coil.

上記超電導線材８ａ，８ｂは、第２の超電導線材２と同じように低電気抵抗材で補強された超電導線材である。この超電導線材８ａ，８ｂは、第２の超電導線材２に対して追加接続されたものであってもよいし、第２の超電導線材２そのものであってもよい。   The superconducting wires 8a and 8b are superconducting wires reinforced with a low electrical resistance material in the same manner as the second superconducting wire 2. The superconducting wires 8a and 8b may be additionally connected to the second superconducting wire 2 or may be the second superconducting wire 2 itself.

超電導コイル７ａ，７ｂの製作では、段毎に（パンケーキ毎に）、内周側から第２の超電導線材２を巻き、第１の超電導線材１と第２の超電導線材２との間の接合部３をコイル内部に巻き込みつつ、第１の超電導線材１を外周側へ向けて巻き回す。   In the production of the superconducting coils 7a and 7b, the second superconducting wire 2 is wound from the inner peripheral side for each stage (each pancake), and the joining between the first superconducting wire 1 and the second superconducting wire 2 is performed. The first superconducting wire 1 is wound toward the outer peripheral side while the part 3 is wound inside the coil.

上記構成においては、超電導コイル７ａ，７ｂのそれぞれのコイル口出し後の電気的接続は、超電導線材８ａ，８ｂおよび渡り部９を介して行われる。   In the above configuration, the electrical connection of each of the superconducting coils 7 a and 7 b after the coil opening is made through the superconducting wires 8 a and 8 b and the crossover part 9.

この第４の実施形態によれば、超電導コイル７ａと超電導コイル７ｂとの電気的接続は低電気抵抗材で補強された超電導線材８ａ，８ｂ同士で渡り部９を介して行われるため、低抵抗接続が可能であり、また、接続長を短くすることができる。また、超電導コイル７ａ，７ｂのそれぞれのコイル口出し後の相互の接続のための引き回し距離を短くすることができる。   According to the fourth embodiment, since the electrical connection between the superconducting coil 7a and the superconducting coil 7b is performed between the superconducting wires 8a and 8b reinforced with the low electric resistance material via the crossover portion 9, the low resistance is achieved. Connection is possible, and the connection length can be shortened. In addition, it is possible to shorten the routing distance for mutual connection of the superconducting coils 7a and 7b after the coil leads.

（第５の実施形態）
次に、図６を参照して、本発明の第５の実施形態について説明する。 (Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG.

この第５の実施形態に係る超電導線材の接続構造は、図１に示されるものと同じである。図６は、本発明の第５の実施形態に係る超電導線材を巻線した超電導コイルを有するダブルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図である。図６中、（ａ）は超電導コイル装置を軸方向から見た場合の概略構成を示し、（ｂ）は超電導コイル装置を軸方向に垂直な方向から見た場合の概略構成を示している。   The connection structure of the superconducting wire according to the fifth embodiment is the same as that shown in FIG. FIG. 6 is a plan sectional view and a side view showing a schematic configuration of a double pancake-shaped superconducting coil device having a superconducting coil wound with a superconducting wire according to a fifth embodiment of the present invention. 6A shows a schematic configuration when the superconducting coil device is viewed from the axial direction, and FIG. 6B shows a schematic configuration when the superconducting coil device is viewed from the direction perpendicular to the axial direction.

図６には、第１の超電導コイル７ａおよび第２の超電導コイル７ｂの二段構成を含む超電導コイル装置が示されている。二つの超電導コイル７ａ，７ｂは、それぞれ、図１に示される超電導線材の接続構造を有する。   FIG. 6 shows a superconducting coil device including a two-stage configuration of a first superconducting coil 7a and a second superconducting coil 7b. Each of the two superconducting coils 7a and 7b has a superconducting wire connecting structure shown in FIG.

本実施形態では、超電導コイル７ａ，７ｂの最外層に第２の超電導線材２がそれぞれ配置され、それぞれの第２の超電導線材２の端部を延長させる超電導線材１０ａ，１０ｂが導電性の渡り部９を介して互いに電気的に接続される。渡り部９は、はんだ付けやロウ付けなどにより実現される。   In this embodiment, the 2nd superconducting wire 2 is each arrange | positioned in the outermost layer of superconducting coil 7a, 7b, and the superconducting wire 10a, 10b which extends the edge part of each 2nd superconducting wire 2 is a conductive crossover part. 9 are electrically connected to each other. The transition part 9 is realized by soldering or brazing.

超電導線材１０ａは、超電導コイル７ａの最外層に位置する第２の超電導線材２の端部を延長させるものであり、一方、超電導線材１０ｂは、超電導コイル７ｂの最外層に位置する第２の超電導線材２の端部を延長させるものである。これらの超電導線材１０ａ，１０ｂは、互いにコイル中心を挟んで対向する最外層の位置から引き出されており、コイル中央部にて渡り部９により接合されている。   The superconducting wire 10a extends the end of the second superconducting wire 2 located in the outermost layer of the superconducting coil 7a, while the superconducting wire 10b is the second superconducting material located in the outermost layer of the superconducting coil 7b. The end of the wire 2 is extended. These superconducting wires 10a and 10b are drawn from the position of the outermost layer facing each other across the coil center, and are joined by a crossover 9 at the center of the coil.

上記超電導線材１０ａ，１０ｂは、第２の超電導線材２と同じように低電気抵抗材で補強された超電導線材である。この超電導線材８ａ，８ｂは、第２の超電導線材２に対して追加接続されたものであってもよいし、第２の超電導線材２そのものであってもよい。   The superconducting wires 10a and 10b are superconducting wires reinforced with a low electrical resistance material in the same manner as the second superconducting wire 2. The superconducting wires 8a and 8b may be additionally connected to the second superconducting wire 2 or may be the second superconducting wire 2 itself.

超電導コイル７ａ，７ｂの製作では、段毎に（パンケーキ毎に）、内周側から第１の超電導線材１を巻き、第１の超電導線材１と第２の超電導線材２との間の接合部３を巻き込みつつ、第２の超電導線材２を最外周に巻き回す。   In the production of the superconducting coils 7a and 7b, the first superconducting wire 1 is wound from the inner peripheral side for each step (each pancake), and the first superconducting wire 1 and the second superconducting wire 2 are joined. The second superconducting wire 2 is wound around the outermost periphery while winding the portion 3.

上記構成においては、超電導コイル７ａ，７ｂのそれぞれのコイル口出し後の電気的接続は、超電導線材１０ａ，１０ｂおよび渡り部９を介して行われる。   In the above configuration, the electrical connection of each of the superconducting coils 7 a and 7 b after the coil opening is made through the superconducting wires 10 a and 10 b and the crossover part 9.

この第５の実施形態によれば、超電導コイル７ａと超電導コイル７ｂとの電気的接続は低電気抵抗材で補強された超電導線材１０ａ，１０ｂ同士で渡り部９を介して行われるため、低抵抗接続が可能であり、また、接続長を短くすることができる。   According to the fifth embodiment, since the electrical connection between the superconducting coil 7a and the superconducting coil 7b is performed between the superconducting wires 10a and 10b reinforced with the low electrical resistance material via the crossover portion 9, the low resistance is achieved. Connection is possible, and the connection length can be shortened.

（第６の実施形態）
次に、図７を参照して、本発明の第６の実施形態について説明する。 (Sixth embodiment)
Next, a sixth embodiment of the present invention will be described with reference to FIG.

この第６の実施形態に係る超電導線材の接続構造は、図１に示されるものと同じである。図７は、本発明の第６の実施形態に係る超電導線材を巻線した超電導コイルを有するダブルパンケーキ形状の超電導コイル装置の概略構成を示す平断面図および側面図である。この図７は、図６の構成の変形例を示すものである。   The connection structure of the superconducting wire according to the sixth embodiment is the same as that shown in FIG. FIG. 7 is a plan sectional view and a side view showing a schematic configuration of a double pancake-shaped superconducting coil device having a superconducting coil wound with a superconducting wire according to a sixth embodiment of the present invention. FIG. 7 shows a modification of the configuration of FIG.

本実施形態では、超電導コイル７ａ，７ｂの最外層に第２の超電導線材２がそれぞれ配置され、それぞれの第２の超電導線材２の端部を延長させる超電導線材１０ａ，１０ｂが、図６に示した渡り部９ではなく、低電気抵抗材１１を用いて互いに電気的に接続される。   In the present embodiment, the second superconducting wire 2 is disposed on the outermost layer of the superconducting coils 7a and 7b, and the superconducting wires 10a and 10b extending the ends of the second superconducting wires 2 are shown in FIG. They are electrically connected to each other using the low electrical resistance material 11 instead of the bridge portion 9.

この第６の実施形態によれば、超電導線材１０ａと超電導線材１０ｂとの接続部分に低電気抵抗材１１を使用しているため、低抵抗接続をより一層確実に実現することができる。   According to the sixth embodiment, since the low electrical resistance material 11 is used in the connection portion between the superconducting wire 10a and the superconducting wire 10b, the low resistance connection can be realized more reliably.

（第７の実施形態）
次に、図８を参照して、本発明の第７の実施形態について説明する。 (Seventh embodiment)
Next, a seventh embodiment of the present invention will be described with reference to FIG.

図８は、本発明の第７の実施形態に係る超電導線材の接続構造を示す要部拡大断面図である。   FIG. 8 is an enlarged cross-sectional view of a main part showing a connection structure for a superconducting wire according to a seventh embodiment of the present invention.

この第７の実施形態に係る超電導線材の接続構造は、図３もしくは図５の超電導コイル装置（すなわち、コイル最内層に第２の超電導線材２が配置される超電導コイル装置）に適用されるものである。   The superconducting wire connecting structure according to the seventh embodiment is applied to the superconducting coil device shown in FIG. 3 or 5 (that is, the superconducting coil device in which the second superconducting wire 2 is arranged in the innermost layer of the coil). It is.

この第７の実施形態に係る超電導線材の接続構造は、前述の図１に示される構成に加え、第１の超電導線材１とコイル巻枠５との間に絶縁テープ１２が挟み込まれた構成を有するものとなっている。すなわち、第１の超電導線材１とコイル巻枠５との間の空間を埋めるようにして第２の超電導線材２の隣に絶縁テープ１２が挟み込まれたものとなっている。   The connection structure of the superconducting wire according to the seventh embodiment has a structure in which an insulating tape 12 is sandwiched between the first superconducting wire 1 and the coil winding frame 5 in addition to the structure shown in FIG. It has become. That is, the insulating tape 12 is sandwiched next to the second superconducting wire 2 so as to fill the space between the first superconducting wire 1 and the coil winding frame 5.

上記構成においては、第１の超電導線材１は巻き回されることでコイル中心方向に押さえ付けられるが、絶縁テープ１２が挟み込まれているため、第２の超電導線材２との接続面の端で第１の超電導線材１が折れ曲がることがない。   In the above configuration, the first superconducting wire 1 is wound in the direction of the coil center by being wound, but since the insulating tape 12 is sandwiched, at the end of the connection surface with the second superconducting wire 2 The first superconducting wire 1 is not bent.

この第７の実施形態によれば、第１の超電導線材１とコイル巻枠５との間に絶縁テープ１２が挟み込まれているため、第２の超電導線材２との接続面の端で第１の超電導線材１が折れ曲がることがなく、超電導特性が劣化することを防ぐことができる。   According to the seventh embodiment, since the insulating tape 12 is sandwiched between the first superconducting wire 1 and the coil winding frame 5, the first superconducting wire 2 is connected to the first superconducting wire 2 at the end of the connection surface. This prevents the superconducting wire 1 from being bent and prevents the superconducting characteristics from deteriorating.

（第８の実施形態）
次に、図９および図１０を参照して、本発明の第８の実施形態について説明する。 (Eighth embodiment)
Next, an eighth embodiment of the present invention will be described with reference to FIGS.

図９は、本発明の第８の実施形態に係る超電導線材の接続構造を示す要部拡大断面図である。また、図１０は、同実施形態に係る超電導線材の別の接続構造を示す要部拡大断面図である。   FIG. 9 is an enlarged cross-sectional view of a main part showing a connection structure for a superconducting wire according to an eighth embodiment of the present invention. Moreover, FIG. 10 is a principal part expanded sectional view which shows another connection structure of the superconducting wire which concerns on the embodiment.

この第８の実施形態に係る超電導線材の接続構造は、前述の図８に示される構成に加え、第１の超電導線材１の周回する線材間に絶縁テープ１３が挟み込まれた構成を有するものとなっている。すなわち、第１の超電導線材１が絶縁テープ１３を間に挟みながら同一平面上に巻き重ねられたものとなっている。更には、図１０に示されるように第１の超電導線材１および前記第２の超電導線材２の周囲が絶縁テープ１３の周囲も含めて絶縁物１４で満たされたものとすることが望ましい。   The superconducting wire connecting structure according to the eighth embodiment has a configuration in which the insulating tape 13 is sandwiched between the wire rods of the first superconducting wire 1 in addition to the configuration shown in FIG. 8 described above. It has become. That is, the first superconducting wire 1 is wound on the same plane with the insulating tape 13 interposed therebetween. Furthermore, as shown in FIG. 10, it is desirable that the periphery of the first superconducting wire 1 and the second superconducting wire 2 is filled with the insulator 14 including the periphery of the insulating tape 13.

上記構成においては、絶縁テープ１３により、周回する超電導線材１同士が絶縁される。また、満たされた絶縁物１４により、第１の超電導線材１が固定される。   In the above configuration, the surrounding superconducting wires 1 are insulated by the insulating tape 13. The first superconducting wire 1 is fixed by the filled insulator 14.

この第８の実施形態によれば、周回する超電導線材１同士の絶縁性を高めることができるとともに、超電導線材間の熱伝導を確保することができる。   According to the eighth embodiment, the insulation between the superconducting wires 1 that circulate can be enhanced, and thermal conduction between the superconducting wires can be ensured.

本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。   The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

１ａ，１ｃ…高電気抵抗材、２ａ，２ｃ…低電気抵抗材、１ｂ，２ｂ…超電導線材、３…接合部、４…電極、５…コイル巻枠、６…接続部、７ａ…第１の超伝導コイル、７ｂ…第２の超電導コイル、８ａ，８ｂ，１０ａ，１０ｂ…延長用の超電導線材、９…渡り部、１１…低電気抵抗材、１２，１３…絶縁テープ、１４…絶縁物。   DESCRIPTION OF SYMBOLS 1a, 1c ... High electrical resistance material, 2a, 2c ... Low electrical resistance material, 1b, 2b ... Superconducting wire, 3 ... Joint part, 4 ... Electrode, 5 ... Coil frame, 6 ... Connection part, 7a ... 1st Superconducting coil, 7b ... second superconducting coil, 8a, 8b, 10a, 10b ... superconducting wire for extension, 9 ... crossover, 11 ... low electrical resistance material, 12, 13 ... insulating tape, 14 ... insulator.

Claims (12)

高電気抵抗材で補強された第１の超電導線材の一部と低電気抵抗材で補強された第２の超電導線材の少なくとも一部とが重なるように接合され、かつ、接合部を通じて電気的に接続されることを特徴とする超電導線材の接続構造。   A part of the first superconducting wire reinforced with the high electrical resistance material and at least a part of the second superconducting wire reinforced with the low electrical resistance material are joined so as to overlap each other, and electrically through the joint. Superconducting wire connection structure characterized by being connected. 請求項１に記載の超電導線材の接続構造において、前記第２の超電導線材が金属製の電極に電気的に接続されることを特徴とする超電導線材の接続構造。   The superconducting wire connection structure according to claim 1, wherein the second superconducting wire is electrically connected to a metal electrode. 請求項２に記載の超電導線材の接続構造において、少なくとも前記第１の超電導線材の一部を前記電極の一部に機械的に固定する接続部を有することを特徴とする超電導線材の接続構造。   3. The superconducting wire connection structure according to claim 2, further comprising a connecting portion for mechanically fixing at least a part of the first superconducting wire to a part of the electrode. 請求項１乃至３のいずれか１項に記載の超電導線材の接続構造を有する超電導コイル装置。   The superconducting coil apparatus which has the connection structure of the superconducting wire of any one of Claims 1 thru | or 3. 金属製の電極が取り付けられたコイル巻枠に沿って超電導線材が巻線された超電導コイルを有する超電導コイル装置であって、
前記超電導コイルは、高電気抵抗材で補強された第１の超電導線材の一部と低電気抵抗材で補強された第２の超電導線材の少なくとも一部とが重なるように接合され、かつ、接合部を通じて電気的に接続される超電導線材の接続構造を有し、
前記超電導コイルの最内層には前記第２の超電導線材が配置され、当該第２の超電導線材が前記電極に電気的に接続されることを特徴とする超電導コイル装置。 A superconducting coil device having a superconducting coil in which a superconducting wire is wound along a coil winding frame to which a metal electrode is attached,
The superconducting coil is joined so that a part of the first superconducting wire reinforced with a high electrical resistance material and at least a part of the second superconducting wire reinforced with a low electrical resistance material overlap each other. Having a connection structure of superconducting wire that is electrically connected through the section,
The superconducting coil device, wherein the second superconducting wire is disposed in the innermost layer of the superconducting coil, and the second superconducting wire is electrically connected to the electrode. 第１の超電導コイルおよび第２の超電導コイルの二段構成を含む超電導コイル装置であって、
前記第１の超電導コイルおよび前記第２の超電導コイルは、それぞれ、高電気抵抗材で補強された第１の超電導線材の一部と低電気抵抗材で補強された第２の超電導線材の少なくとも一部とが重なるように接合され、かつ、接合部を通じて電気的に接続される超電導線材の接続構造を有し、
前記第１の超電導コイルおよび前記第２の超電導コイルのそれぞれに設けられる前記第２の超電導線材が互いに電気的に接続されることを特徴とする超電導コイル装置。 A superconducting coil device including a two-stage configuration of a first superconducting coil and a second superconducting coil,
The first superconducting coil and the second superconducting coil are respectively at least one of a part of the first superconducting wire reinforced with a high electrical resistance material and a second superconducting wire reinforced with a low electrical resistance material. A superconducting wire connecting structure that is joined so as to overlap with each other and electrically connected through the joint,
The superconducting coil device, wherein the second superconducting wires provided in each of the first superconducting coil and the second superconducting coil are electrically connected to each other. 請求項６に記載の超電導コイル装置において、前記第１の超電導コイルおよび前記第２の超電導コイルの最内層に前記第２の超電導線材がそれぞれ設けられ、それぞれの前記第２の超電導線材が導電性の渡り部を介して電気的に接続されることを特徴とする超電導コイル装置。   7. The superconducting coil device according to claim 6, wherein the second superconducting wire is provided on the innermost layer of the first superconducting coil and the second superconducting coil, and each of the second superconducting wires is conductive. A superconducting coil device characterized in that it is electrically connected via a crossover part. 請求項６に記載の超電導コイル装置において、前記第１の超電導コイルおよび前記第２の超電導コイルの最外層に前記第２の超電導線材がそれぞれ設けられ、それぞれの前記第２の超電導線材が導電性の渡り部を介して互いに電気的に接続されることを特徴とする超電導コイル装置。   7. The superconducting coil device according to claim 6, wherein the second superconducting wire is provided on the outermost layer of the first superconducting coil and the second superconducting coil, and each of the second superconducting wires is electrically conductive. A superconducting coil device that is electrically connected to each other via a crossover portion. 請求項６に記載の超電導コイル装置において、前記第１の超電導コイルおよび前記第２の超電導コイルの最外層に前記第２の超電導線材がそれぞれ設けられ、それぞれの前記第２の超電導線材が低電気抵抗材を用いて互いに電気的に接続されることを特徴とする超電導コイル装置。   7. The superconducting coil device according to claim 6, wherein the second superconducting wire is provided on the outermost layer of the first superconducting coil and the second superconducting coil, respectively, and each of the second superconducting wires is low in electric power. A superconducting coil device which is electrically connected to each other using a resistance material. 請求項５又は７に記載の超電導コイル装置において、前記第１の超電導線材とコイル巻枠との間に絶縁テープが挟み込まれていることを特徴とする超電導コイル装置。   The superconducting coil device according to claim 5 or 7, wherein an insulating tape is sandwiched between the first superconducting wire and a coil winding frame. 請求項１０に記載の超電導コイル装置において、前記第１の超電導線材の周回する線材間に絶縁テープが挟み込まれていることを特徴とする超電導コイル装置。   The superconducting coil device according to claim 10, wherein an insulating tape is sandwiched between wires that the first superconducting wire circulates. 請求項１１に記載の超電導コイル装置において、前記第１の超電導線材および前記第２の超電導線材の周囲が絶縁物で満たされていることを特徴とする超電導コイル装置。   The superconducting coil device according to claim 11, wherein the first superconducting wire and the second superconducting wire are filled with an insulator.
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