JP4752744B2 - Superconducting coil - Google Patents
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- JP4752744B2 JP4752744B2 JP2006324402A JP2006324402A JP4752744B2 JP 4752744 B2 JP4752744 B2 JP 4752744B2 JP 2006324402 A JP2006324402 A JP 2006324402A JP 2006324402 A JP2006324402 A JP 2006324402A JP 4752744 B2 JP4752744 B2 JP 4752744B2
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本発明は、超電導コイルに関し、詳しくは、巻枠に多層構造の薄膜超電導線材を巻回してなるパンケーキ型の超電導コイルにおいて、薄膜超電導線材に歪みを生じさせず、安定かつ高性能な超電導コイルとするものである。 The present invention relates to a superconducting coil, and more specifically, in a pancake type superconducting coil formed by winding a thin-film superconducting wire having a multilayer structure around a winding frame, the thin-film superconducting wire is not distorted and is stable and high-performance. It is what.
従来、特開２００３−３２３８２２号公報等において、基板、中間層、超電導層、及び安定化層を有する多層構造の薄膜超電導線材が提供されている。
この種の薄膜超電導線材を絶縁テープと重ねて巻枠に渦巻状に巻回してパンケーキ型の超電導コイルとしたものにおいて、加熱処理して一体的に硬化させた、所謂、含浸コイルは、超電導コイルの使用時における薄膜超電導線材の機械的動きを抑制し、コイル強度を保持すると共に、薄膜超電導線材相互の絶縁保護を行い、超電導コイルの超電導状態が壊れる状態である「クエンチ」を防止するために有効であるとされている。
Conventionally, in Japanese Patent Application Laid-Open No. 2003-323822, a thin film superconducting wire having a multilayer structure having a substrate, an intermediate layer, a superconducting layer, and a stabilizing layer is provided.
This type of thin film superconducting wire is overlapped with an insulating tape and wound in a spiral shape on a winding frame to form a pancake type superconducting coil. To suppress the mechanical movement of the thin film superconducting wire when using the coil, to maintain the coil strength, to protect each other from the thin film superconducting wire, and to prevent "quenching", which is a state where the superconducting state of the superconducting coil is broken It is said that it is effective.
従来の含浸コイルは、図４に示すように、前記絶縁テープ１５を、巻枠１２と薄膜超電導線材１１の最内周ターン（Ｔ１）との間、最内周ターンの外周面と次のターン（Ｔ２）から最外周ターン（ＴＺ）までのターン間、最外周ターン（ＴＺ）の外周面の各箇所に配置して互いに接着し、巻枠１２および薄膜超電導線材１１と共に加熱硬化することにより一体化して製造されている。
As shown in FIG. 4, the conventional impregnated coil is formed by connecting the
しかし、多層構造の薄膜超電導線材は歪みが発生すると、異種材料からなる薄膜超電導線材の基板と中間層、超電導層と安定化層の間においては層間剥離が生じる恐れがある。
そのため、前記の含浸コイルのように巻枠と薄膜超電導線材を接着固定すると、使用時に液体窒素温度以下に冷却されたり、点検時に液体窒素温度から急激に室温まで温度上昇されると、巻枠と薄膜超電導線材の熱収縮率差により薄膜超電導線材に歪みが生じ、前記した層間剥離が生じる恐れがある。
However, when a thin film superconducting wire having a multilayer structure is distorted, delamination may occur between the substrate and the intermediate layer of the thin film superconducting wire made of different materials and between the superconducting layer and the stabilizing layer.
Therefore, when the winding frame and the thin film superconducting wire are bonded and fixed as in the impregnated coil, when cooled to below the liquid nitrogen temperature during use, or when the temperature is rapidly increased from the liquid nitrogen temperature to room temperature during inspection, There is a possibility that the thin film superconducting wire is distorted due to the difference in thermal contraction rate of the thin film superconducting wire, and the above delamination occurs.
具体的には、室温から液体窒素温度（７７Ｋ）まで冷却した場合の、薄膜超電導線材のコイル軸線方向の熱収縮率は略０．３％であるのに対し、巻枠のコイル軸線方向の熱収縮率は略０．７５％である。この熱収縮率の相違により、巻枠の熱収縮に薄膜超電導線材が引きずられ、薄膜超電導線材に歪みが生じる恐れがある。 Specifically, the thermal contraction rate in the coil axis direction of the thin film superconducting wire when cooled from room temperature to liquid nitrogen temperature (77 K) is approximately 0.3%, whereas the heat in the coil axis direction of the winding frame The shrinkage rate is approximately 0.75%. Due to the difference in thermal shrinkage rate, the thin film superconducting wire is dragged by the thermal contraction of the winding frame, and the thin film superconducting wire may be distorted.
本発明は前記問題に鑑みてなされたものであり、薄膜超電導線材の機械的動きを抑制して十分なコイル強度を保持しつつ、室温と液体窒素温度のヒートサイクルにおいて、薄膜超電導線材に巻枠との熱収縮率の差異に伴う歪みを生じさせない、安定で高性能な超電導コイルを提供することを課題としている。 The present invention has been made in view of the above-described problem, and suppresses mechanical movement of a thin film superconducting wire to maintain a sufficient coil strength, and in a heat cycle of room temperature and liquid nitrogen temperature, a reel is formed on the thin film superconducting wire. It is an object of the present invention to provide a stable and high-performance superconducting coil that does not cause distortion due to the difference in thermal contraction rate.
前記課題を解決するため、本発明は、巻枠に多層構造の薄膜超電導線材を巻回してなるパンケーキ型の超電導コイルにおいて、
最内周ターンの薄膜超電導線材は前記巻枠の外周面に接着せずに巻き付けている一方、前記最内周ターンの外周面と次のターンの内周面の間から最外周ターンまで、ターン間の薄膜超電導線材の間に粘着性を有する絶縁樹脂テープを挟み、該絶縁樹脂テープの内外周面を内外周の前記薄膜超電導線材と粘着させて、最内周ターンから最外周ターン間での薄膜超電導線材を一体化し、かつ、
前記薄膜超電導線材の最外周ターンの外周面に絶縁樹脂テープを複数回数巻き付けて絶縁保護層を設け、該絶縁保護層と前記最外周ターンの薄膜超電導線材とは接着していないことを特徴とする超電導コイルを提供している。
In order to solve the above problems, the present invention provides a pancake-type superconducting coil in which a thin film superconducting wire having a multilayer structure is wound around a winding frame.
The thin-film superconducting wire of the innermost turn is wound without adhering to the outer peripheral surface of the winding frame, while the turn from the outer peripheral surface of the innermost turn and the inner peripheral surface of the next turn to the outermost turn. An insulating resin tape having adhesiveness is sandwiched between the thin film superconducting wires, and the inner and outer peripheral surfaces of the insulating resin tape are adhered to the inner and outer thin film superconducting wires, and the innermost turn to the outermost turn Integrated thin film superconducting wire , and
An insulating protective layer is provided by winding an insulating resin tape a plurality of times on the outer peripheral surface of the outermost turn of the thin film superconducting wire, and the insulating protective layer and the thin film superconducting wire of the outermost turn are not bonded. A superconducting coil is provided.
本発明者は、薄膜超電導線材の機械的な動きは確実に抑制しながら、薄膜超電導線材に熱収縮率差に伴う歪みを発生させない超電導コイルの巻線構造について鋭意研究した。その結果、最内周ターンの薄膜超電導線材は前記巻枠の外周面に接着しなくても、最内周ターンから最外周ターン間での薄膜超電導線材を一体化すれば層間剥離が発生しない安定した超電導コイルとすることができることを知見した。 The present inventor has intensively studied a winding structure of a superconducting coil that does not cause distortion due to a difference in thermal shrinkage in the thin film superconducting wire while reliably suppressing mechanical movement of the thin film superconducting wire. As a result, even if the innermost turn thin film superconducting wire does not adhere to the outer peripheral surface of the winding frame, if the thin film superconducting wire between the innermost turn and the outermost turn is integrated, delamination does not occur. It was found that the superconducting coil can be made.
即ち、本発明の超電導コイルでは、薄膜超電導線材の最内周ターンを巻枠に接着固定していないため、巻枠の熱収縮率と薄膜超電導線材の熱収縮率が相違しても、巻枠の収縮に引きずられて薄膜超電導線材に歪みが生じることはなく、薄膜超電導薄膜の層間剥離を発生させることがない。
一方、最内周ターンの外周面と次のターンの内周面の間から最外周ターンまでは、ターン間の薄膜超電導線材の間に粘着性を有する絶縁樹脂テープを挟み、該絶縁樹脂テープの内外周面を内外周の前記薄膜超電導線材と粘着させて、最外周ターンから最内周ターン間での薄膜超電導線材を一体化しているので、薄膜超電導線材の機械的な動きは確実に抑制し、クエンチを防止することができる。
That is, in the superconducting coil of the present invention, since the innermost turn of the thin film superconducting wire is not bonded and fixed to the winding frame, even if the thermal shrinkage rate of the winding frame and the thin film superconducting wire are different, the winding frame The thin film superconducting wire is not distorted due to the contraction of the thin film, and delamination of the thin film superconducting thin film does not occur.
On the other hand, between the outer peripheral surface of the innermost turn and the inner peripheral surface of the next turn to the outermost turn, an insulating resin tape having adhesiveness is sandwiched between the thin film superconducting wires between the turns, and the insulating resin tape The inner and outer peripheral surfaces are adhered to the inner and outer thin film superconducting wires, and the thin film superconducting wires from the outermost turn to the innermost turn are integrated, so the mechanical movement of the thin film superconducting wire is reliably suppressed. Can prevent quenching.
前記絶縁樹脂テープはプリプレグテープからなり、
前記最内周ターンの薄膜超電導線材の内周面と前記巻枠との間に、前記プリプレグテープを介在させていないことが好ましい。
The insulating resin tape is made of prepreg tape,
It is preferable that the prepreg tape is not interposed between the inner peripheral surface of the thin film superconducting wire of the innermost turn and the winding frame.
前記図４に示すように、従来の超電導コイルでは前記最内周ターンの薄膜超電導線材の内周面と前記巻枠との間にもプリプレグテープを介在させていたが、本発明では前記のように巻枠と薄膜超電導線材とを接着するプリプレグテープを介在させていないため、前記熱収縮率差による薄膜超電導線材の歪み発生をなくすことができる。 As shown in FIG. 4, in the conventional superconducting coil, a prepreg tape is interposed between the inner peripheral surface of the thin film superconducting wire of the innermost turn and the winding frame. Since the prepreg tape for adhering the winding frame and the thin film superconducting wire is not interposed between the thin film superconducting wire and the thin film superconducting wire due to the difference in heat shrinkage, the distortion can be eliminated.
前記プリプレグテープは、炭素繊維、ガラス繊維等の強化繊維をクロス織してエポキシ樹脂等の未硬化樹脂を含浸したものであり、絶縁性があると共に、粘着力があり、加熱すると硬化接着させることができるものである。前記絶縁樹脂テープとしてプリプレグを用いることで、最内周ターンから最外周ターン間での薄膜超電導線材を絶縁しながら一体化し、機械的な動きを抑制することができる。 The prepreg tape is made by cross-weaving reinforcing fibers such as carbon fiber and glass fiber and impregnated with an uncured resin such as an epoxy resin, and has an insulating property and adhesive strength, and is cured and bonded when heated. It is something that can be done. By using a prepreg as the insulating resin tape, the thin film superconducting wire from the innermost turn to the outermost turn can be integrated while being insulated, and mechanical movement can be suppressed.
前記最内周ターンの薄膜超電導線材の内周面と前記巻枠の外周面との間は、接着しない構成とすればよいが、非粘着性のポリイミドテープを介在させることが好ましい。
ポリイミドテープは、液体窒素温度以下の極低温においても優れた機械的特性を有する絶縁材料であり、非粘着性であるため巻枠の外周面と薄膜超電導線材の内周面との間に密着配置して巻枠に薄膜超電導線材を強く巻き付けることができ、より安定な超電導コイルとすることができる。
前記ポリイミドテープとしては、特に、カプトン（登録商標）テープを用いることが特に好ましい。
The inner circumferential surface of the innermost turn thin film superconducting wire and the outer circumferential surface of the winding frame may be configured not to adhere to each other, but a non-adhesive polyimide tape is preferably interposed.
Polyimide tape is an insulating material that has excellent mechanical properties even at cryogenic temperatures below liquid nitrogen temperature, and is non-adhesive, so it is closely placed between the outer peripheral surface of the reel and the inner peripheral surface of the thin film superconducting wire. Thus, the thin film superconducting wire can be strongly wound around the winding frame, and a more stable superconducting coil can be obtained.
As the polyimide tape, it is particularly preferable to use a Kapton (registered trademark) tape.
前記非粘着性のポリイミドテープに代えて、図４における巻枠の外周面に接するプリプレグテープの剥離紙を剥がさずに用いて、前記最内周ターンの薄膜超電導線材と前記巻枠の外周面とを接着固定しない構成としてもよい。 In place of the non-adhesive polyimide tape, without using the release paper of the prepreg tape in contact with the outer peripheral surface of the winding frame in FIG. 4, the innermost turn thin film superconducting wire and the outer peripheral surface of the winding frame It is good also as a structure which does not adhere and fix.
前記のように、薄膜超電導線材の最外周ターンの外周面には絶縁樹脂テープを複数回数巻き付けて絶縁保護層を設け、該絶縁保護層と前記最外周ターンの薄膜超電導線材とは接着していない。 As described above, an insulating resin tape is wound around the outer peripheral surface of the outermost turn of the thin film superconducting wire a plurality of times to provide an insulating protective layer, and the insulating protective layer is not bonded to the thin film superconducting wire of the outermost turn. Yes.
前記絶縁保護層は絶縁樹脂テープを複数回巻き付けて設けることにより、薄膜超電導線材の最外周ターンを絶縁保護すると共に、超電導コイルの保形性を維持することができる。さらに、薄膜超電導線材の最外周ターンの先端に取り付ける外電極を起立保持することができる。
該絶縁保護層を形成する絶縁樹脂テープの巻き付け回数は、前記した目的を達成することができる回数であればよく、好ましくは２〜１０回、より好ましくは４〜６回である。
The insulating protective layer is provided by wrapping an insulating resin tape a plurality of times to insulate and protect the outermost peripheral turn of the thin film superconducting wire and to maintain the shape retention of the superconducting coil. Furthermore, the outer electrode attached to the tip of the outermost peripheral turn of the thin film superconducting wire can be held upright.
The number of windings of the insulating resin tape for forming the insulating protective layer may be any number that can achieve the above-described purpose, and is preferably 2 to 10 times, more preferably 4 to 6 times.
前記絶縁保護層と薄膜超電導線材の最外周ターンとは、前記のように、接着固定していない。これにより絶縁保護層との熱収縮特性の差異に基づいて薄膜超電導線材に歪みが発生するのを確実に無くすことができる。
即ち、外周の絶縁保護層と薄膜超電導線材のコイル軸線方向の熱収縮率は共に略０．３％であるが、薄膜超電導線材と絶縁保護層は異なる材料からなり、温度領域によって熱収縮特性が異なるため、絶縁保護層と薄膜超電導線材の間も非接着としておくことが好ましい。
The insulating and protective layer and the outermost turns of the thin-film superconducting wire, as described above, have such are bonded and fixed. Thereby, it is possible to reliably eliminate the occurrence of distortion in the thin film superconducting wire based on the difference in heat shrinkage characteristics with the insulating protective layer.
That is, the thermal shrinkage rate in the coil axis direction of the outer peripheral insulating protective layer and the thin film superconducting wire is both about 0.3%, but the thin film superconducting wire and the insulating protective layer are made of different materials, and the heat shrinkage characteristics vary depending on the temperature range. Because of the difference, it is preferable that the insulating protective layer and the thin film superconducting wire are not adhered.
前記絶縁保護層を形成する絶縁樹脂テープは、薄膜超電導線材の最外周ターンに連続して巻き付ける部分は非粘着性のポリイミドテープからなり、該ポリイミドテープの巻終わり端に連続して粘着性のプリプレグテープを用いることが好ましい。 The insulating resin tape forming the insulating protective layer is made of a non-adhesive polyimide tape at the portion continuously wound around the outermost peripheral turn of the thin film superconducting wire, and is continuously adhered to the end of winding of the polyimide tape. It is preferable to use a tape.
前記構成とすることで、薄膜超電導線材と接する絶縁保護層は非粘着性とするとともに、絶縁保護層の外側は前記粘着性のプリプレグテープで形成しているため、一体的に硬化させることができる。そのため、超電導コイルの外形を保持できる。
前記ポリイミドテープとしては、特に、カプトン（登録商標）テープを用いることが好ましい。
With this configuration, the insulating protective layer in contact with the thin film superconducting wire is made non-adhesive, and the outside of the insulating protective layer is formed of the adhesive prepreg tape, so that it can be cured integrally. . Therefore, the outer shape of the superconducting coil can be maintained.
As the polyimide tape, it is particularly preferable to use a Kapton (registered trademark) tape.
前記巻枠は、強化繊維をクロス織して樹脂を含浸したプリプレグシートを積層した一体化して形成したものからなることが好ましい。
前記構成のように巻枠をプリプレグシートを積層して形成した繊維強化プラスチック（ＦＲＰ）から構成することにより、液体窒素温度における機械的特性を確保することができ、高い安定性を有する超電導コイルとすることができる。
It is preferable that the winding frame is formed by integrally forming a prepreg sheet in which reinforcing fibers are cross-woven and impregnated with a resin.
By configuring the winding frame from fiber reinforced plastic (FRP) formed by laminating prepreg sheets as in the above configuration, it is possible to ensure mechanical characteristics at liquid nitrogen temperature, and a superconducting coil having high stability; can do.
本発明の薄膜超電導線材は、多層構造を有するものであれば問わないが、例えば、ハステロイ（登録商標）テープからなる金属基板に、ＹＳＺ（イットリウム安定化ジルコニア）からなるセラミックス中間層、ホルミウム系酸化物超電導体等の酸化物超電導層からなる超電導層、銀等からなる安定化層が積層された構造を有する薄膜超電導線材が挙げられる。さらに、積層体の全周は無電解メッキにより前記銅からなる金属保護膜で被覆されていてもよい。 The thin film superconducting wire of the present invention is not limited as long as it has a multilayer structure. For example, a metal substrate made of Hastelloy (registered trademark) tape, a ceramic intermediate layer made of YSZ (yttrium-stabilized zirconia), holmium oxide Examples thereof include a thin film superconducting wire having a structure in which a superconducting layer composed of an oxide superconducting layer such as a physical superconductor or a stabilizing layer composed of silver or the like is laminated. Furthermore, the entire periphery of the laminate may be covered with the metal protective film made of copper by electroless plating.
前述したように、本発明によれば、巻枠と薄膜超電導線材を接着固定していないので、薄膜超電導線材に室温と使用温度（液体窒素温度）の間における巻枠との熱収縮率差に伴う歪みを生じさせることはない。その一方で、前記最内周ターンの外周面と次のターンの内周面の間から最外周ターンまで、ターン間の薄膜超電導線材の間に粘着性を有する絶縁樹脂テープを挟み、該絶縁樹脂テープの内外周面を内外周の前記薄膜超電導線材と粘着させて、最外周ターンから最内周ターン間での薄膜超電導線材を一体化しているので、薄膜超電導線材の機械的動きを抑制することができ、クエンチを防止して、安定かつ高性能な超電導コイルとすることができる。 As described above, according to the present invention, since the reel and the thin film superconducting wire are not bonded and fixed, the thin film superconducting wire has a difference in thermal shrinkage between the reel and the room temperature between the room temperature and the use temperature (liquid nitrogen temperature). There is no associated distortion. On the other hand, an insulating resin tape having adhesiveness is sandwiched between the thin film superconducting wires between the turns from the outer peripheral surface of the innermost turn and the inner peripheral surface of the next turn to the outermost turn, and the insulating resin The inner and outer peripheral surfaces of the tape are adhered to the inner and outer thin film superconducting wires, and the thin film superconducting wires from the outermost turn to the innermost turn are integrated, thereby suppressing the mechanical movement of the thin film superconducting wire. Therefore, quenching can be prevented, and a stable and high-performance superconducting coil can be obtained.
さらに、最外周ターンの薄膜超電導線材と絶縁保護層を接着固定しないことにより、薄膜超電導線材に絶縁保護層との熱収縮特性の差異に伴う歪みを生じさせることもなく、より安定かつ高性能な超電導コイルとすることができる。 Furthermore, by not bonding and fixing the thin-film superconducting wire of the outermost turn and the insulating protective layer, the thin-film superconducting wire does not cause distortion due to the difference in thermal shrinkage characteristics with the insulating protective layer, and is more stable and high-performance. It can be a superconducting coil.
以下、本発明の実施形態を図面を参照して説明する。
図１は、本発明の第１実施形態の超電導コイル１０を示す。
超電導コイル１０は、図１（Ａ）に示すように、多層構造の薄膜超電導線材１１を絶縁テープ（図示せず）と共に巻枠１２に渦巻き状に巻回し、加熱処理して一体に固めて形成したシングルパンケーキ型コイルである。
該超電導コイル１０は、薄膜超電導線材１１として酸化物超電導体を用いており、液体窒素温度（７７Ｋ）に冷却されて使用される。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a
As shown in FIG. 1 (A), the
The
前記薄膜超電導線材１１の最内周ターン（Ｔ１）の先端内周面には前記内電極１３を取り付けて電気接続し、該内電極１３を前記巻枠１２に設けた取付部に固定している。一方、薄膜超電導線材１１の最外周ターンの先端外周面（ＴＺ）には外電極１４を取り付けて電気接続しており、該外電極１４の外側に絶縁保護層１７を設けている。
The
図１（Ｂ）は、超電導コイル１０をＡ−Ａ線においてコイル軸方向（図中矢印Ｙ）と平行に切断した場合のＡ−Ａ断面図である。
図１（Ｂ）に示すように、本実施形態では最内周ターンの薄膜超電導線材（Ｔ１）の内周面と前記巻枠１２との間には非粘着性のポリイミドテープ１６−１を挿入して薄膜超電導線材１１と共に巻枠１２に巻きつけている。このように、最内周ターンの薄膜超電導線材（Ｔ１）の内周面と前記巻枠１２との間は非粘着性のポリイミドテープ１６−１を介在させているだけで接着していない。
FIG. 1B is a cross-sectional view taken along the line AA when the
As shown in FIG. 1B, in this embodiment, a non-adhesive polyimide tape 16-1 is inserted between the inner peripheral surface of the innermost turn thin film superconducting wire (T1) and the winding
薄膜超電導線材１１の最内周ターン（Ｔ１）の外周面と次のターン（Ｔ２）の内周面の間から、最外周ターン（ＴＺ）までのターン間には粘着性を有するプリプレグテープ１５を挟み、該プリプレグテープ１５の内外周面を内外周の前記薄膜超電導線材１１と接着させている。
An
また、前記薄膜超電導線材１１の最外周ターン（ＴＺ）の外周面には非粘着性のポリイミドテープ１６−２を１周巻きつけたのち、プリプレグテープ１５を４周巻き付け、絶縁保護層１７を形成している。
Further, after the non-adhesive polyimide tape 16-2 is wound once around the outer peripheral surface of the outermost turn (TZ) of the thin film superconducting wire 11, the
巻線後に超電導コイル１０全体を加熱硬化させることで、薄膜超電導線材１１の最内周ターン（Ｔ１）と巻枠１２の間、最外周ターン（ＴＺ）から絶縁保護層１７の間は遊離させた状態で、最内周ターン（Ｔ１）から最外周ターン（ＴＺ）間で薄膜超電導線材１１をプリプレグテープ１５を介して一体化しているとともに、絶縁保護層１７を一体化させている。
The entire
本構成とすることで、薄膜超電導線材１１の機械的動きは抑制してコイル強度を保持しながら、室温と使用温度（液体窒素温度）間における巻枠１２との熱収縮率差に伴う歪みの影響を薄膜超電導線材１１に生じさせることはないため、安定かつ高性能な超電導コイルとすることができる。
さらに、絶縁保護層１７と絶縁保護層１７の外周側をプリプレグテープ１６の巻き付けで行っていることにより、薄膜超電導線材の巻き止め、外電極１４の起立保持ができるほか、超電導コイルの外形を強固保持にすることができる。
By adopting this configuration, the mechanical movement of the thin film superconducting wire 11 is suppressed and the coil strength is maintained, while the distortion caused by the difference in thermal contraction rate between the
Further, the outer peripheral side of the insulating
前記巻枠１２は、強化繊維をクロス織して樹脂を含浸したプリプレグシートを軸線方向（図中矢印Ｙの方向）に積層して一体化して形成したものを用いている。
As the winding
なお、本実施形態における前記薄膜超電導線材１１は、金属からなる基板層、セラミックスからなる中間層、酸化物超電導体からなる超電導層、銀からなる安定化層が積層された多層構造からなるが、該構造に限定されない。 The thin film superconducting wire 11 in this embodiment has a multilayer structure in which a substrate layer made of metal, an intermediate layer made of ceramic, a superconducting layer made of an oxide superconductor, and a stabilizing layer made of silver are laminated. The structure is not limited.
図２に第１実施形態の変形例を示す。
第１実施形態との相違点は、第１実施形態のように最内周ターンの薄膜超電導線材（Ｔ１）の内周面と前記巻枠１２との間に非粘着性のポリイミドテープ１６−１を介在させていない点である。
本構成としても、薄膜超電導線材の最内周ターン（Ｔ１）は前記巻枠１２の外周面に接着せずに巻き付けることができ、容易に安定な超電導コイルを作製することができる。
他の構成および作用効果は第１実施形態と同様のため、同一の符号を付して説明を省略する。
FIG. 2 shows a modification of the first embodiment.
The difference from the first embodiment is that, as in the first embodiment, a non-adhesive polyimide tape 16-1 between the inner peripheral surface of the thin film superconducting wire (T1) having the innermost turn and the winding
Also in this configuration, the innermost turn (T1) of the thin film superconducting wire can be wound around the outer peripheral surface of the winding
Since other configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.
図３に第２実施形態の超電導コイル２０を示す。
第１実施形態との相違点は、最内周ターンの薄膜超電導線材（Ｔ１）の内周面と前記巻枠１２との間、及び最外周ターンの薄膜超電導線材（ＴＺ）の外周面に非粘着性のポリイミドテープ１６を介在させる代わりに、剥離紙１８の付いたプリプレグテープ１５を介在させている点である。
FIG. 3 shows a
The difference from the first embodiment is that there is no difference between the inner peripheral surface of the thin-film superconducting wire (T1) of the innermost turn and the
即ち、本実施形態の超電導コイル２０は、非接着部分とする薄膜超電導線材の最内周ターン（Ｔ１）の内周面のプリプレグテープ１５−１の剥離紙１８−１、及び最外周ターン（ＴＺ）の外周面と接する絶縁保護層１７の内周面側のプリプレグテープ１５−２の剥離紙１８−２を剥がさずに巻枠１２に巻き付けている構成としている。
本構成は、図４に示す従来の超電導コイル３０において、非接着部分としたい部分の剥離紙を残したのみの構成であるので、従来から用いられている材料を用いたままで、容易に巻枠１２と薄膜超電導線材１１の最内周ターン（Ｔ１）を非接着とすることができる。
他の構成および作用効果は第１実施形態と同様のため、同一の符号を付して説明を省略する。
That is, the
Since this configuration is a configuration in which only a part of the release paper that is desired to be a non-adhesive portion is left in the
Since other configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.
第１、第２実施形態において、シングルパンケーキ型の超電導コイルに関する実施形態について述べたが、本発明はダブルパンケーキ型の超電導コイルにも同様に適用することができる。
さらに、本発明は、前記第１、第２実施形態に限定されず、特許請求の範囲と均等の範囲内の変更が含まれる。
In the first and second embodiments, the embodiments related to the single pancake type superconducting coil have been described. However, the present invention can also be applied to a double pancake type superconducting coil.
Furthermore, the present invention is not limited to the first and second embodiments, and includes modifications within the scope equivalent to the scope of claims.
１０，２０，３０ 超電導コイル
１１ 薄膜超電導線材
Ｔ１ 最内周ターン
ＴＺ 最外周ターン
１２ 巻枠
１３ 内電極
１４ 外電極
１５ 絶縁テープ、プリプレグテープ
１６ ポリイミドテープ
１７ 絶縁保護層
１８ 剥離紙
10, 20, 30 Superconducting coil 11 Thin film superconducting wire T1 Innermost turn TZ Outermost turn 12
Claims (4)
最内周ターンの薄膜超電導線材は前記巻枠の外周面に接着せずに巻き付けている一方、前記最内周ターンの外周面と次のターンの内周面の間から最外周ターンまで、ターン間の薄膜超電導線材の間に粘着性を有する絶縁樹脂テープを挟み、該絶縁樹脂テープの内外周面を内外周の前記薄膜超電導線材と粘着させて、最内周ターンから最外周ターン間での薄膜超電導線材を一体化し、かつ、
前記薄膜超電導線材の最外周ターンの外周面に絶縁樹脂テープを複数回数巻き付けて絶縁保護層を設け、該絶縁保護層と前記最外周ターンの薄膜超電導線材とは接着していないことを特徴とする超電導コイル。 In a pancake type superconducting coil formed by winding a thin film superconducting wire having a multilayer structure around a winding frame,
The thin-film superconducting wire of the innermost turn is wound without adhering to the outer peripheral surface of the winding frame, while the turn from the outer peripheral surface of the innermost turn and the inner peripheral surface of the next turn to the outermost turn. An insulating resin tape having adhesiveness is sandwiched between the thin film superconducting wires, and the inner and outer peripheral surfaces of the insulating resin tape are adhered to the inner and outer thin film superconducting wires, and the innermost turn to the outermost turn Integrated thin film superconducting wire , and
An insulating protective layer is provided by winding an insulating resin tape a plurality of times on the outer peripheral surface of the outermost turn of the thin film superconducting wire, and the insulating protective layer and the thin film superconducting wire of the outermost turn are not bonded. Superconducting coil.
前記最内周ターンの薄膜超電導線材の内周面と前記巻枠との間に、前記プリプレグテープを介在させていない請求項１に記載の超電導コイル。 The insulating resin tape is made of prepreg tape,
The superconducting coil according to claim 1, wherein the prepreg tape is not interposed between an inner peripheral surface of the thin-film superconducting wire of the innermost turn and the winding frame.
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| EP2587493A1 (en) | 2011-10-24 | 2013-05-01 | Riken | Coated high-temperature superconducting wire and high-temperature superconducting coil including the same |
| CN103714936A (en) * | 2013-12-21 | 2014-04-09 | 华中科技大学 | High temperature superconductor coil and winding technology thereof |
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| JP5534712B2 (en) * | 2009-05-15 | 2014-07-02 | 株式会社東芝 | High temperature superconducting pancake coil and high temperature superconducting coil |
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| US9183970B2 (en) | 2011-10-24 | 2015-11-10 | Riken | Coated high-temperature superconducting wire and high-temperature superconducting coil including the same |
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