JP7343859B2

JP7343859B2 - Conduction-cooled superconducting coil

Info

Publication number: JP7343859B2
Application number: JP2019168013A
Authority: JP
Inventors: 洋之渡邊; 伸夫岩城; 良寛瀧本; 秀樹田中; 毅和久田; 明山本
Original assignee: Hitachi Ltd; Inter University Research Institute Corp High Energy Accelerator Research Organization
Current assignee: Hitachi Ltd; Inter University Research Institute Corp High Energy Accelerator Research Organization
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2023-09-13
Anticipated expiration: 2039-09-17
Also published as: JP2021048154A

Description

本発明は、伝導冷却型超伝導コイルに関する。 The present invention relates to a conduction-cooled superconducting coil.

従来、低温超伝導体を使用した超伝導磁石において、導体を冷媒に浸漬し難い構造の磁石では伝導冷却方式が採用されている。この技術に関する文献としては、例えば非特許文献１－４がある。
非特許文献１においては、超伝導導体の外側にアルミニウム合金、及び純アルミニウムを配置してコイル巻線部を冷却している。
非特許文献２においては、コイル巻線の層間に純アルミニウム板を設置してコイル巻線部を冷却している。
非特許文献３や非特許文献４においては、コイル巻線の層間、および内外周にアルミニウム板を設置してコイル巻線部を冷却している。 Conventionally, in superconducting magnets using low-temperature superconductors, a conduction cooling method has been adopted in magnets whose structure makes it difficult to immerse the conductor in a coolant. Documents related to this technology include, for example, Non-Patent Documents 1 to 4.
In Non-Patent Document 1, an aluminum alloy and pure aluminum are placed outside a superconducting conductor to cool the coil winding portion.
In Non-Patent Document 2, a pure aluminum plate is installed between the layers of the coil winding to cool the coil winding.
In Non-Patent Document 3 and Non-Patent Document 4, aluminum plates are installed between the layers of the coil winding and on the inner and outer peripheries to cool the coil winding portion.

前記の構造に関連する特許文献としては、例えば特許文献１－４がある。
特許文献１では、コイル導体を支持する電磁力支持シリンダーの外側または内側に冷却用熱伝導体を配置する構造が開示されている。
特許文献２では、超伝導コイル巻線の層間に導体に沿うような凹部を設けた冷却用金属板を設置する構造が開示されている。
特許文献３では、超伝導コイル巻線の層間に冷却板を設置した構造が開示されている。
特許文献４では、超伝導コイル巻線の層間に良熱伝導性樹脂または良熱伝導性樹脂と冷却板の両方を設置した構造が開示されている。
また、特許文献３と特許文献４では、定常的な冷却のみならず交流通電時の発熱を除去する目的も含めた冷却構造が開示されている。さらに特許文献４では、低温超伝導のみならず酸化物高温超伝導体も視野に入れた冷却構造が開示されている。 Patent documents related to the above structure include, for example, Patent Documents 1 to 4.
Patent Document 1 discloses a structure in which a cooling heat conductor is arranged outside or inside an electromagnetic force support cylinder that supports a coil conductor.
Patent Document 2 discloses a structure in which a cooling metal plate is installed between layers of a superconducting coil winding, with a recess along the conductor.
Patent Document 3 discloses a structure in which a cooling plate is installed between layers of superconducting coil winding.
Patent Document 4 discloses a structure in which a good thermal conductive resin or both a good thermal conductive resin and a cooling plate are installed between layers of a superconducting coil winding.
Further, Patent Document 3 and Patent Document 4 disclose cooling structures that are not only for steady cooling but also for the purpose of removing heat generated when AC current is applied. Further, Patent Document 4 discloses a cooling structure that takes into consideration not only low-temperature superconductors but also oxide high-temperature superconductors.

一方、高温超伝導体（相転移温度Ｔｃが約２５Ｋ以上）においては、クエンチ伝播速度が遅く、クエンチした場合の温度上昇が低温超伝導体よりも大きくなる傾向にある。したがって、高温超伝導体を使用したコイルにおいては、その電流密度によってはクエンチ時の局所的発熱過大により焼損する可能性があり、その対策として過去種々の検討が実施されてきた。例えば、非特許文献５や非特許文献６がある。
非特許文献５や非特許文献６ではＭｇＢ₂（二ホウ化マグネシウム）導体を平板状にして、やはり平板状の銅板を半田付けすることにより、クエンチ時の熱を拡散させ、導体温度上昇を抑制している。
この平板状の銅板は、先に述べたコイル巻線層間の冷却板と同様の役目を果たすこととなり、コイルの伝導冷却の促進にも寄与する構造となっている。 On the other hand, in high-temperature superconductors (phase transition temperature Tc of about 25 K or higher), the quench propagation speed is slow and the temperature rise when quenched tends to be larger than in low-temperature superconductors. Therefore, depending on the current density, a coil using a high-temperature superconductor may burn out due to excessive local heat generation during quenching, and various studies have been carried out in the past as countermeasures. For example, there are non-patent literature 5 and non-patent literature 6.
In Non-Patent Document 5 and Non-Patent Document 6, by making a MgB ₂ (magnesium diboride) conductor into a flat plate and soldering a flat copper plate, the heat during quenching is diffused and the conductor temperature rise is suppressed. are doing.
This flat copper plate plays the same role as the cooling plate between the coil winding layers described above, and has a structure that also contributes to promoting conductive cooling of the coil.

特開昭６３－２９３９０１号公報Japanese Unexamined Patent Publication No. 63-293901 国際公開第２０１４／０４９８４２号International Publication No. 2014/049842 特開平１０－１１６７２５号公報Japanese Patent Application Publication No. 10-116725 特開平１１－１３５３１８号公報Japanese Patent Application Publication No. 11-135318

A. Yamamoto, 他９名, "Conceptual Design of a Thin Superconducting Solenoid for Particle Astrophysics" IEEE Transactions on Magnetics, Vol.24, No.2, March 1988A. Yamamoto, 9 others, "Conceptual Design of a Thin Superconducting Solenoid for Particle Astrophysics" IEEE Transactions on Magnetics, Vol.24, No.2, March 1988 Y. Makida, 他８名, "Development of an Astromag Test Coil with Aluminum Stabilized Superconductor" IEEE Transactions on Magnetics, Vol.27, No.2, March 1991Y. Makida, and 8 others, "Development of an Astromag Test Coil with Aluminum Stabilized Superconductor" IEEE Transactions on Magnetics, Vol.27, No.2, March 1991 A. Yamamoto, 他１１名, "A Thin Superconducting Solenoid Magnet for Particle Astrophysics" IEEE Transactions on Superconductivity, Vol.12, No.1, March 2002A. Yamamoto, and 11 others, "A Thin Superconducting Solenoid Magnet for Particle Astrophysics" IEEE Transactions on Superconductivity, Vol.12, No.1, March 2002 Y. Makida, 他６名, "Performance of an Ultra-Thin Superconducting Solenoid for Particle Astrophysics" IEEE Transactions on Applied Superconductivity, Vol.15, No.2, June 2005Y. Makida, and 6 others, "Performance of an Ultra-Thin Superconducting Solenoid for Particle Astrophysics" IEEE Transactions on Applied Superconductivity, Vol.15, No.2, June 2005 S. Mine, 他７名，"Development of a 3T-250mm Bore MgB2 Magnet System" IEEE Transactions on Applied Superconductivity, Vol.25, No.3, June 2015S. Mine, and 7 others, "Development of a 3T-250mm Bore MgB2 Magnet System" IEEE Transactions on Applied Superconductivity, Vol.25, No.3, June 2015 M. Wozniak, 他１名，"Long-Length Critical Current Measurement of MgB2 Wire in a Coil" IEEE Transactions on Applied Superconductivity, Vol.26, No.3, April 2016M. Wozniak, et al., "Long-Length Critical Current Measurement of MgB2 Wire in a Coil" IEEE Transactions on Applied Superconductivity, Vol.26, No.3, April 2016

以上、背景技術で述べたように、従来の高温超伝導体を利用した超伝導コイルでは、クエンチ時に局所的に発熱して高温になり、絶縁損傷を発生させたり、あるいは導体自体が焼損したりする可能性がある。そのため、導体に銅板のような冷却板を半田付けして一体化するような手法が必要であった。また、この銅板が定常時におけるコイル冷却促進の役割も担うことになっている。
しかしながら、この方法は、導体全長にわたって銅板を半田付けする処理が必要となり、コイル製作のコストが比較的上昇することとなる。
また、超伝導導体を冷却するのにコイル巻線層間に冷却板を設置する場合、冷却銅板のコイル軸方向端部における冷却構造が冷却構造上の熱的隘路とならない構造とする必要がある。しかし、その点に関する合理的な構造の提案は、特許文献１－４、非特許文献１－６を含めて、現状ではない。 As mentioned above in the background section, in superconducting coils using conventional high-temperature superconductors, local heat generation occurs during quenching, resulting in high temperatures, which can cause insulation damage or burnout of the conductor itself. there's a possibility that. Therefore, a method was needed to integrate a cooling plate such as a copper plate by soldering it to the conductor. This copper plate also plays a role in promoting coil cooling during steady state.
However, this method requires a process of soldering a copper plate over the entire length of the conductor, which relatively increases the cost of manufacturing the coil.
Furthermore, when a cooling plate is installed between the coil winding layers to cool the superconducting conductor, the cooling structure at the coil axial end of the cooling copper plate needs to be structured so that it does not become a thermal bottleneck in the cooling structure. However, there are currently no proposals for a rational structure in this regard, including Patent Documents 1-4 and Non-Patent Documents 1-6.

本発明は、クエンチしてもコイル損傷が発生しにくく、急速な冷却が可能な伝導冷却型超伝導コイルを提供することを課題（目的）とする。 An object (object) of the present invention is to provide a conduction-cooled superconducting coil that is less susceptible to coil damage even when quenched and is capable of rapid cooling.

前記の課題を解決するために、本発明を以下のように構成した。
すなわち、本発明の伝導冷却型超伝導コイルは、超伝導物質を有しコイル状に構成される超伝導線と、前記超伝導線が卷回されるボビンと、前記ボビンに卷回されてコイル状の軸方向および径方向に層状に配置された前記超伝導線の各層を挟むように配置される複数の第１冷却板と、前記超伝導線のコイル状の径方向に積層された各層で前記超伝導線が複数本として配列された端の少なくとも一方において、前記超伝導線よりも軸方向における外側に、前記第１冷却板同士の間に挟まれるように配置される複数の第２冷却板と、を備え、前記第１冷却板の前記超伝導線のコイル状の軸方向における長さの寸法は、層状に配置された前記超伝導線と複数の前記第１冷却板とで積層された超伝導線冷却板積層部のコイル状の軸方向の長さの寸法と、前記第２冷却板のコイル状の軸方向の長さの寸法との合計以上の寸法で形成されて、前記第１冷却板は、複数の前記超伝導線と複数の前記第２冷却板とを覆っており、前記第２冷却板は、前記超伝導線のコイル状の径方向における１層の厚さの寸法が、前記超伝導線の１層の径方向の長さの寸法と等しい寸法であり、前記第２冷却板の前記超伝導線のコイル状の軸方向における長さの寸法が、複数の前記第１冷却板と複数の前記第２冷却板が積層された冷却板積層部の厚さの寸法と等しい寸法であり、前記超伝導線と複数の前記第１冷却板と複数の第２冷却板とは、樹脂により一体化されていることを特徴とする。 In order to solve the above problems, the present invention was configured as follows.
That is, the conduction-cooled superconducting coil of the present invention includes a superconducting wire having a superconducting material and having a coil shape, a bobbin around which the superconducting wire is wound, and a coil wound around the bobbin. a plurality of first cooling plates disposed to sandwich each layer of the superconducting wire arranged in layers in the axial and radial directions ; and each layer of the superconducting wire stacked in the radial direction of the coil. A plurality of second cooling plates arranged to be sandwiched between the first cooling plates on the outer side of the superconducting wires in the axial direction at at least one of the ends where the plurality of superconducting wires are arranged. a plate, the length of the first cooling plate in the coiled axial direction of the superconducting wire is laminated with the superconducting wire arranged in a layered manner and a plurality of the first cooling plates. The superconducting wire cooling plate is formed with a dimension that is greater than or equal to the sum of the axial length of the coiled superconducting wire cooling plate laminated portion and the axial length of the coiled second cooling plate . The first cooling plate covers the plurality of superconducting wires and the plurality of second cooling plates, and the second cooling plate has a thickness of one layer in the radial direction of the coiled superconducting wire. is equal to the length in the radial direction of one layer of the superconducting wire, and the length in the axial direction of the coiled superconducting wire of the second cooling plate is equal to the length in the radial direction of one layer of the superconducting wire. The superconducting wire, the plurality of first cooling plates, and the plurality of second cooling plates have dimensions equal to the thickness of a cooling plate laminated portion in which the first cooling plate and the plurality of second cooling plates are laminated. is characterized by being integrated with resin.

また、その他の手段は、発明を実施するための形態のなかで説明する。 Further, other means will be explained in the detailed description.

本発明によれば、クエンチしてもコイル損傷が発生しにくく、また急速な冷却が可能な伝導冷却型超伝導コイルを提供できる。 According to the present invention, it is possible to provide a conduction-cooled superconducting coil that is less susceptible to coil damage even when quenched and is capable of rapid cooling.

本発明の第１実施形態に係る伝導冷却型超伝導コイル超伝導コイルの中心軸を含む切断面における断面構造の一例を示す図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an example of a cross-sectional structure of a conduction-cooled superconducting coil according to a first embodiment of the present invention, taken along a cut plane including the central axis of the superconducting coil. 本発明の第１実施形態に係る伝導冷却型超伝導コイルの中心軸方向に垂直な切断面における断面構造の一例を示す図である。1 is a diagram showing an example of a cross-sectional structure of a conduction-cooled superconducting coil according to a first embodiment of the present invention, taken along a cut plane perpendicular to the central axis direction. 本発明の第１実施形態に係る伝導冷却型超伝導コイルの中心軸Ｚ方向に垂直な図２Ａとは別の切断面における断面構造の一例を模式的に示す図である。2A is a diagram schematically showing an example of a cross-sectional structure of the conduction-cooled superconducting coil according to the first embodiment of the present invention in a cross-sectional plane different from that in FIG. 2A perpendicular to the central axis Z direction. FIG. 本発明の第１実施形態に係る伝導冷却型超伝導コイルにおける超伝導線の断面構造の一例を示す図である。1 is a diagram showing an example of a cross-sectional structure of a superconducting wire in a conduction-cooled superconducting coil according to a first embodiment of the present invention. 本発明の第２実施形態に係る伝導冷却型超伝導コイルの中心軸を含む切断面における断面構造の一例を示す図である。FIG. 7 is a diagram showing an example of a cross-sectional structure of a conduction-cooled superconducting coil according to a second embodiment of the present invention, taken along a cut plane including the central axis. 本発明の第２実施形態に係る伝導冷却型超伝導コイルの超伝導線冷却板積層部における超伝導線、および、その近傍の構成例を示す図である。FIG. 7 is a diagram illustrating a configuration example of a superconducting wire in a superconducting wire cooling plate laminated portion of a conduction-cooled superconducting coil according to a second embodiment of the present invention and its vicinity. 本発明の第３実施形態に係る伝導冷却型超伝導コイルの中心軸を含む切断面における断面構造の一例を示す図である。It is a figure which shows an example of the cross-sectional structure in the cut plane containing the central axis of the conduction-cooled superconducting coil based on 3rd Embodiment of this invention. 本発明の第４実施形態に係る伝導冷却型超伝導コイルの中心軸方向に垂直な切断面における断面構造の一例を示す図である。It is a figure which shows an example of the cross-sectional structure in the cut plane perpendicular|vertical to the central axis direction of the conduction cooling type superconducting coil based on 4th Embodiment of this invention.

以下、本発明を実施するための形態（以下においては「実施形態」と表記する）を、適宜、図面を参照して説明する。なお、各図面において、共通する構成要素には同一の符号を付し、重複した説明を、適宜、省略する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as "embodiments") will be described with reference to the drawings as appropriate. In addition, in each drawing, common components are given the same reference numerals, and redundant explanations will be omitted as appropriate.

≪第１実施形態≫
本発明の第１実施形態に係る伝導冷却型超伝導コイルについて、図１～図３を参照して説明する。なお、伝導冷却型超伝導コイルの「超伝導」は「超電導」と同義語として、本発明の実施形態の説明では、「超伝導」と表記する。 ≪First embodiment≫
A conduction-cooled superconducting coil according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Note that the "superconductivity" of the conduction-cooled superconducting coil is synonymous with "superconductivity" and will be referred to as "superconductivity" in the description of the embodiments of the present invention.

《伝導冷却型超伝導コイルの構造》
図１は、本発明の第１実施形態に係る伝導冷却型超伝導コイル１の中心軸Ｚを含む切断面における断面構造の一例を示す図である。
また、図２Ａは、本発明の第１実施形態に係る伝導冷却型超伝導コイル１の中心軸Ｚ方向に垂直な切断面における断面構造の一例を示す図である。また、図２Ａにおいて、二つのＩ－Ｉ軸の交点に図１の中心軸Ｚが位置している。なお、図２Ｂ、図３については、後記する。《Structure of conduction-cooled superconducting coil》
FIG. 1 is a diagram showing an example of a cross-sectional structure of a conduction-cooled superconducting coil 1 taken along a cut plane including a central axis Z according to a first embodiment of the present invention.
Further, FIG. 2A is a diagram showing an example of a cross-sectional structure of the conduction-cooled superconducting coil 1 according to the first embodiment of the present invention, taken on a cut plane perpendicular to the central axis Z direction. Furthermore, in FIG. 2A, the central axis Z of FIG. 1 is located at the intersection of the two II axes. Note that FIGS. 2B and 3 will be described later.

図１および図２Ａにおいて、伝導冷却型超伝導コイル１は、ボビン１１、超伝導線１２、複数の第１冷却板１３、複数の第２冷却板１４を備えて構成される。
超伝導線１２は、１本の超伝導線が筒状（円筒状）のボビン１１を中心として、多層のコイル状に形成されている。そのため、図１および図２において、超伝導線１２は、複数本が配列、もしくは多層に積層したように表記されている。また、超伝導線１２は１本で構成されているが、図面の説明上、「複数（複数本）の超伝導線１２」とも、適宜、表記する。
図１においては、超伝導線１２の断面は、断面構造が円形の場合を例として表記している。また、図２Ａに示すように、超伝導線１２は、コイルの周方向に長い線状で構成されている。
また、図１および図２Ａに示すように、複数の配列として表記したそれぞれの超伝導線１２は、それぞれ二つの第１冷却板１３に挟まれて構成されている。なお、複数の層の超伝導線１２と複数の第１冷却板１３が積層されている部分を、超伝導線冷却板積層部３１（図１）と表記する。 1 and 2A, a conduction-cooled superconducting coil 1 includes a bobbin 11, a superconducting wire 12, a plurality of first cooling plates 13, and a plurality of second cooling plates 14.
The superconducting wire 12 is formed into a multilayer coil shape with a single superconducting wire centered around a cylindrical bobbin 11 . Therefore, in FIGS. 1 and 2, the superconducting wires 12 are shown as if a plurality of superconducting wires were arranged or stacked in multiple layers. Further, although the superconducting wire 12 is composed of one wire, for the sake of explanation of the drawings, it is also appropriately referred to as "a plurality of superconducting wires 12."
In FIG. 1, the cross-section of the superconducting wire 12 is shown as an example where the cross-sectional structure is circular. Further, as shown in FIG. 2A, the superconducting wire 12 is formed into a long linear shape in the circumferential direction of the coil.
Further, as shown in FIGS. 1 and 2A, each of the superconducting wires 12 shown as a plurality of arrays is sandwiched between two first cooling plates 13. Note that the portion where the plurality of layers of superconducting wires 12 and the plurality of first cooling plates 13 are laminated is referred to as a superconducting wire cooling plate laminated portion 31 (FIG. 1).

また、図１に示すように、コイル軸方向（中心軸方向）の超伝導線１２の端部において、第２冷却板１４が備えられている。第２冷却板１４の厚さ（コイル径方向の長さ）は、超伝導線１２の円形断面の直径と、ほぼ同じ長さ（厚さ）である。
複数のそれぞれの第２冷却板１４は、複数（複数本）の超伝導線１２と共に、それぞれ二つの第１冷却板１３に挟まれて構成されている。
なお、複数の第１冷却板１３と複数の第２冷却板１４が交互に積層されている部分を、冷却板積層部３２と表記する。 Further, as shown in FIG. 1, a second cooling plate 14 is provided at the end of the superconducting wire 12 in the coil axis direction (center axis direction). The thickness (length in the coil radial direction) of the second cooling plate 14 is approximately the same length (thickness) as the diameter of the circular cross section of the superconducting wire 12.
Each of the plurality of second cooling plates 14 is configured to be sandwiched between two first cooling plates 13 together with a plurality of superconducting wires 12 .
Note that a portion where the plurality of first cooling plates 13 and the plurality of second cooling plates 14 are alternately stacked is referred to as a cooling plate stacked portion 32.

前記したように、複数の層の超伝導線１２と複数の第１冷却板１３が積層されている部分が超伝導線冷却板積層部３１であるので、超伝導線冷却板積層部３１の図面視で左端と右端の両側の端部に、それぞれ冷却板積層部３２が配置されている。なお、左端と右端における冷却板積層部３２のコイル軸方向の長さが異なる場合には、左端を冷却板積層部３２Ｂ、右端を冷却板積層部３２Ａと表記する。
以下においては、両端の冷却板積層部３２は、同一の構造であるとして説明をする。また、前記したように左端が冷却板積層部３２Ｂで右端が冷却板積層部３２Ａである場合については、後記する第５実施形態で説明する。
また、図１および図２Ａに示すように、第１冷却板１３と第２冷却板１４は、超伝導線１２とともに、筒状のボビン１１を中心として、周方向に形成されている。 As described above, the superconducting wire cooling plate laminated portion 31 is the portion where the plurality of layers of superconducting wires 12 and the plurality of first cooling plates 13 are laminated, so the drawing of the superconducting wire cooling plate laminated portion 31 Cooling plate laminated portions 32 are arranged at both end portions of the left end and the right end as viewed. In addition, when the length of the cooling plate lamination|stacking part 32 in the coil axial direction at a left end and a right end is different, the left end is described as the cooling plate lamination|stacking part 32B, and the right end is described as the cooling plate lamination|stacking part 32A.
In the following description, it is assumed that the cooling plate laminated portions 32 at both ends have the same structure. Further, as described above, the case where the left end is the cooling plate laminated portion 32B and the right end is the cooling plate laminated portion 32A will be described in a fifth embodiment to be described later.
Further, as shown in FIGS. 1 and 2A, the first cooling plate 13 and the second cooling plate 14 are formed along with the superconducting wire 12 in the circumferential direction around the cylindrical bobbin 11.

図１において、複数の第１冷却板１３と複数の第２冷却板１４とが積層された厚さ（冷却板積層部３２の厚さ）を寸法ａと表記する。
また、図１および図２Ａにおいて、複数の第１冷却板１３と複数の超伝導線１２とが積層された厚さ（超伝導線冷却板積層部３１の厚さ）を寸法ｂと表記する。
また、図１において、複数の超伝導線１２が、コイルとしての軸方向に配列された長さ（超伝導線冷却板積層部３１の軸方向の長さ）を寸法ｃとする。
また、第１冷却板１３のコイル軸方向の長さを寸法ｄとする。
また、第２冷却板１４のコイル軸方向の長さ（冷却板積層部３２のコイル軸方向の長さ）を寸法ｅとする。なお、両端の冷却板積層部３２のコイル軸方向の長さが異なる場合には、冷却板積層部３２Ａにおける第２冷却板１４のコイル軸方向の長さを寸法ｅ１とし、冷却板積層部３２Ｂにおける第２冷却板１４のコイル軸方向の長さを寸法ｅ２とする。この寸法ｅ１と寸法ｅ２が異なる場合については、後記する第５実施形態で説明する。
また、一つの第２冷却板１４の厚さを寸法ｆとする。
また、１本の超伝導線１２の厚さ（超伝導線の断面が円形状の場合は直径）を寸法ｇとする。 In FIG. 1, the thickness of the plurality of first cooling plates 13 and the plurality of second cooling plates 14 laminated together (thickness of the cooling plate laminated portion 32) is expressed as a dimension a.
Moreover, in FIGS. 1 and 2A, the thickness of the plurality of first cooling plates 13 and the plurality of superconducting wires 12 laminated together (the thickness of the superconducting wire cooling plate laminated portion 31) is expressed as a dimension b.
Further, in FIG. 1, the length of the plurality of superconducting wires 12 arranged in the axial direction as a coil (the axial length of the superconducting wire cooling plate laminated portion 31) is defined as a dimension c.
Further, the length of the first cooling plate 13 in the coil axial direction is defined as a dimension d.
Further, the length of the second cooling plate 14 in the coil axial direction (the length of the cooling plate laminated portion 32 in the coil axial direction) is defined as a dimension e. In addition, when the lengths of the cooling plate laminated parts 32 at both ends in the coil axial direction are different, the length of the second cooling plate 14 in the coil axial direction in the cooling plate laminated parts 32A is taken as the dimension e1, and the length of the cooling plate laminated parts 32B is set as e1. The length of the second cooling plate 14 in the coil axial direction is defined as a dimension e2. A case where the dimension e1 and the dimension e2 are different will be explained in a fifth embodiment to be described later.
Further, the thickness of one second cooling plate 14 is defined as a dimension f.
Further, the thickness of one superconducting wire 12 (the diameter when the cross section of the superconducting wire is circular) is defined as the dimension g.

図１および図２Ａにおいて、２枚の第１冷却板１３は、複数に配列された超伝導線１２と、１枚の第２冷却板１４を同じように挟んで構成される。そのため、一つの第２冷却板１４の厚さの寸法ｆは、１本の超伝導線１２の厚さ（超伝導線の断面が円形状の場合は直径）の寸法ｇに概ね等しくなるように設定する。
そして、複数の第１冷却板１３と複数の第２冷却板１４とが積層された厚さ（冷却板積層部３２の厚さ）の寸法ａは、複数の超伝導線１２と複数の第１冷却板１３とが積層された厚さ（超伝導線冷却板積層部３１の厚さ）の寸法ｂに概ね等しくなるように設定する。 In FIGS. 1 and 2A, the two first cooling plates 13 are configured by sandwiching a plurality of arranged superconducting wires 12 and one second cooling plate 14 in the same way. Therefore, the thickness f of one second cooling plate 14 is approximately equal to the thickness g of one superconducting wire 12 (diameter if the cross section of the superconducting wire is circular). Set.
Then, the dimension a of the thickness of the plurality of first cooling plates 13 and the plurality of second cooling plates 14 (thickness of the cooling plate laminated portion 32) is the same as that of the plurality of superconducting wires 12 and the plurality of first The thickness of the cooling plate 13 is set to be approximately equal to the dimension b of the laminated thickness (thickness of the superconducting wire cooling plate laminated portion 31).

また、複数（複数本）の超伝導線１２の冷却は、まず、図１における一番上の第１冷却板１３を、図示していない冷凍機器を介して冷却することから行われる。
そして、一番上の第１冷却板１３から、複数の第２冷却板１４や、中段や下段に配置された複数の第１冷却板１３へ伝導冷却が行われる。この伝導冷却の際に、熱は、図１の伝導冷却型超伝導コイル１の端部における複数の第１冷却板１３と複数の第２冷却板１４が交互に積層された部分（冷却板積層部３２）を介して行われる。
この伝導冷却が速やかに、効率的に行われるために、第２冷却板１４のコイル軸方向の長さの寸法ｅを、複数の第１冷却板１３と複数の第２冷却板１４とが積層された厚さの寸法ａと概ね等しく設定する。すなわち、冷却板積層部３２のコイル軸方向の長さの寸法ｅを冷却板積層部３２の厚さの寸法ａと概ね等しく設定する。また、この関係は、冷却板積層部３２のコイル軸方向の長さの寸法ｅを超伝導線冷却板積層部３１の厚さの寸法ｂと概ね等しく設定するに対応する（ａ≒ｂ）。 Moreover, cooling of the plurality of superconducting wires 12 is performed by first cooling the first cooling plate 13 at the top in FIG. 1 via a refrigeration device (not shown).
Conduction cooling is performed from the first cooling plate 13 at the top to the plurality of second cooling plates 14 and the plurality of first cooling plates 13 arranged in the middle and lower stages. During this conduction cooling, heat is transferred to a portion where a plurality of first cooling plates 13 and a plurality of second cooling plates 14 are alternately stacked at the end of the conduction-cooled superconducting coil 1 shown in FIG. 32).
In order to perform this conductive cooling quickly and efficiently, the length e of the second cooling plate 14 in the coil axial direction is determined by the lamination of the plurality of first cooling plates 13 and the plurality of second cooling plates 14. The thickness is set approximately equal to the thickness dimension a. That is, the length e of the cooling plate laminated portion 32 in the coil axial direction is set to be approximately equal to the thickness a of the cooling plate laminated portion 32. Further, this relationship corresponds to setting the length e of the cooling plate laminated portion 32 in the coil axial direction to be approximately equal to the thickness b of the superconducting wire cooling plate laminated portion 31 (a≈b).

前記したように、図１におけるコイル端の第１冷却板１３と第２冷却板１４が積層された部分（冷却板積層部３２）は、冷凍機からの冷却板等で冷却されることになるが、この積層部分の外周側に冷凍機に連結された伝熱板を設置して冷却することを考えると、熱の速やかな流動のために、冷却板積層部分（冷却板積層部３２）のコイル軸方向の長さの寸法ｅが、熱伝導上、コイルの全厚さに概ね対応する超伝導線冷却板積層部３１の厚さの寸法ｂ、あるいは冷却板積層部３２の厚さの寸法ａとほぼ同等であることが合理的である。 As mentioned above, the part (cooling plate stacked part 32) at the end of the coil where the first cooling plate 13 and the second cooling plate 14 are stacked in FIG. 1 is cooled by a cooling plate etc. from a refrigerator. However, considering that a heat transfer plate connected to a refrigerator is installed on the outer circumferential side of this laminated portion for cooling, the cooling plate laminated portion (cooling plate laminated portion 32) is The length e in the axial direction of the coil is the thickness b of the superconducting wire cooling plate laminated portion 31 or the thickness of the cooling plate laminated portion 32, which approximately corresponds to the total thickness of the coil in terms of heat conduction. It is reasonable that it is approximately equivalent to a.

また、第１冷却板１３のコイル軸方向の長さの寸法ｄは、複数の超伝導線１２がコイルとしての軸方向に配列された長さの寸法ｃと第２冷却板１４のコイル軸方向の長さの寸法ｅの合計値よりも長い。すなわち、第１冷却板１３は、複数の超伝導線１２と第２冷却板１４とを覆う。
図１においては、複数の第１冷却板１３と複数の第２冷却板１４とが積層された箇所が複数の超伝導線１２と複数の第１冷却板１３とが積層された箇所の両側にあるので、概ね、ｄ＝ｃ＋２ｅの関係がある。
また、複数の第１冷却板１３と複数の第２冷却板１４とが積層された箇所（冷却板積層部３２）が複数の超伝導線１２と複数の第１冷却板１３とが積層された箇所（超伝導線冷却板積層部３１）の片側の場合には、概ねｄ＝ｃ＋ｅの関係がある。
両側あるいは片側のいずれの場合でも、ｄ≧ｃ＋ｅの関係がある。
前記したように、概ねｅ＝ａの関係があるとしたので、ｄ≧ｃ＋ａの関係がある。
すなわち、第１冷却板１３のコイル軸方向の長さの寸法ｄは、複数の超伝導線１２がコイルとしての軸方向に配列された長さの寸法ｃに比較して、少なくとも片側においては、コイルの全厚さに概ね対応する超伝導線冷却板積層部３１の厚さの寸法ｂと同程度の寸法、あるいはそれ以上の寸法に設定している。 Further, the length d of the first cooling plate 13 in the coil axial direction is the length c of the plurality of superconducting wires 12 arranged in the axial direction as a coil, and the length c of the second cooling plate 14 in the coil axial direction. It is longer than the total value of the length dimension e. That is, the first cooling plate 13 covers the plurality of superconducting wires 12 and the second cooling plate 14.
In FIG. 1, a portion where a plurality of first cooling plates 13 and a plurality of second cooling plates 14 are stacked is on both sides of a portion where a plurality of superconducting wires 12 and a plurality of first cooling plates 13 are stacked. Therefore, there is generally a relationship of d=c+2e.
In addition, a portion where a plurality of first cooling plates 13 and a plurality of second cooling plates 14 are laminated (cooling plate lamination part 32) is a place where a plurality of superconducting wires 12 and a plurality of first cooling plates 13 are laminated. In the case of one side of the location (superconducting wire cooling plate laminated portion 31), there is approximately a relationship of d=c+e.
Whether on both sides or on one side, there is a relationship of d≧c+e.
As mentioned above, since it is generally assumed that e=a, there is a relationship d≧c+a.
That is, the length d of the first cooling plate 13 in the coil axial direction is, at least on one side, as compared to the length c of the plurality of superconducting wires 12 arranged in the axial direction as a coil. The thickness is set to be approximately the same as or greater than the thickness b of the superconducting wire cooling plate laminated portion 31, which approximately corresponds to the total thickness of the coil.

また、図２Ｂは、本発明の第１実施形態に係る伝導冷却型超伝導コイル１の中心軸Ｚ方向に垂直な図２Ａとは別の切断面における断面構造の一例を模式的に示す図である。
図１および図２Ａにおいて、伝導冷却型超伝導コイル１が、超伝導線１２、複数の第１冷却板１３、複数の第２冷却板１４で構成されていることを説明した。ただし、１本の超伝導線１２をコイル状に巻回している。このコイル状に巻回された１本の超伝導線１２と、複数の第１冷却板１３、複数の第２冷却板１４との関係が図１および図２Ａでは必ずしも明確とは言えないので図２Ｂを用いて補足説明をする。 Further, FIG. 2B is a diagram schematically showing an example of the cross-sectional structure of the conduction-cooled superconducting coil 1 according to the first embodiment of the present invention in a cross-sectional plane different from that in FIG. 2A perpendicular to the central axis Z direction. be.
In FIGS. 1 and 2A, it has been explained that the conduction-cooled superconducting coil 1 is composed of the superconducting wire 12, a plurality of first cooling plates 13, and a plurality of second cooling plates 14. However, one superconducting wire 12 is wound into a coil. The relationship between this single superconducting wire 12 wound into a coil shape, the plurality of first cooling plates 13, and the plurality of second cooling plates 14 is not necessarily clear in FIGS. 1 and 2A, so the figure A supplementary explanation will be provided using 2B.

図２Ｂは、前記したように図２Ａとは別の断面の構造を模式的に示している。
図２Ｂが図２Ａと異なるのは、領域２００における構造である。領域２００において、１本の超伝導線１２が如何にコイル状に形成されるかを模式的に示している。
図２Ｂの領域２００においては、超伝導線１２が、内側（内層）から外側（外層）、あるいは下層から上層へ移行する様子を示している。なお、この超伝導線１２が巻かれて、内側から外側、あるいは下層から上層へ移行する箇所においては、所定の第１冷却板１３に孔部が、適宜、設けられる。 As described above, FIG. 2B schematically shows a cross-sectional structure different from that shown in FIG. 2A.
2B differs from FIG. 2A in the structure in region 200. In region 200, it is schematically shown how one superconducting wire 12 is formed into a coil shape.
In the region 200 of FIG. 2B, the superconducting wire 12 is shown transitioning from the inside (inner layer) to the outside (outer layer) or from the lower layer to the upper layer. Incidentally, holes are appropriately provided in predetermined first cooling plates 13 at locations where the superconducting wire 12 is wound and transitions from the inside to the outside or from the lower layer to the upper layer.

図１、図２Ａ、図２Ｂにおいて示した超伝導線１２は、例えば高温超伝導体であるＭｇＢ₂（二ホウ化マグネシウム）が用いられている。また、高温超伝導体を用いた超伝導線を高温超伝導線と呼称するものとする。
なお、高温超伝導体の定義は、日本工業規格ＪＩＳＨ７００５で定めた約２５Ｋ（ケルビン）以上の相転移温度Ｔｃを持つ超伝導体とする。
また、約２５Ｋ（ケルビン）未満の相転移温度Ｔｃを持つ超伝導体を低温超伝導体とする。図１、図２Ａ、図２Ｂにおいて示した超伝導線１２は、低温超伝導体も用いることができる。
また、第１冷却板１３と第２冷却板１４は、例えば銅で形成（構成）されている。 The superconducting wire 12 shown in FIGS. 1, 2A, and 2B is made of, for example, MgB ₂ (magnesium diboride), which is a high-temperature superconductor. Furthermore, a superconducting wire using a high-temperature superconductor will be referred to as a high-temperature superconducting wire.
Note that a high-temperature superconductor is defined as a superconductor having a phase transition temperature Tc of approximately 25 K (Kelvin) or higher as defined by Japanese Industrial Standard JIS H7005.
Further, a superconductor having a phase transition temperature Tc of less than about 25 K (Kelvin) is defined as a low-temperature superconductor. A low-temperature superconductor can also be used for the superconducting wire 12 shown in FIGS. 1, 2A, and 2B.
Further, the first cooling plate 13 and the second cooling plate 14 are formed (constructed) of, for example, copper.

また、複数の超伝導線１２と複数の第１冷却板１３と複数の第２冷却板１４とを備えた伝導冷却型超伝導コイル１は、図示していない樹脂によって一体化されている。この一体化する際には、液状の樹脂を超伝導線１２と第１冷却板１３と第２冷却板１４との間に浸透させていく。なお、樹脂の絶縁性や熱伝導率は格別な特性は要求されない。例えば、樹脂の絶縁性は、超伝導線１２が超伝導体として使用される場合には、電流は超伝導体の状態にある超伝導線１２を流れるので樹脂の絶縁性は、格別、問題とならない。
また、樹脂の熱伝導率が高くなくとも時間をかけて超伝導線１２を冷却すれば、いずれ超伝導線１２は超伝導体の状態となる。そのため、樹脂の熱伝導率は、格別、問題とならない。
超伝導線１２と第１冷却板１３と第２冷却板１４との間に樹脂を含侵させることは、真空状態にしておくよりも、固定性、耐久性、冷却効率などの観点で望ましくなる。 Further, the conduction-cooled superconducting coil 1, which includes a plurality of superconducting wires 12, a plurality of first cooling plates 13, and a plurality of second cooling plates 14, is integrated with a resin (not shown). During this integration, liquid resin is infiltrated between the superconducting wire 12, the first cooling plate 13, and the second cooling plate 14. Note that the resin is not required to have special properties in terms of insulation and thermal conductivity. For example, when the superconducting wire 12 is used as a superconductor, current flows through the superconducting wire 12 in the state of a superconductor, so the insulating property of the resin is a particular problem. No.
Further, even if the thermal conductivity of the resin is not high, if the superconducting wire 12 is cooled over time, the superconducting wire 12 will eventually become a superconductor. Therefore, the thermal conductivity of the resin does not pose any particular problem.
Impregnating a resin between the superconducting wire 12, the first cooling plate 13, and the second cooling plate 14 is more desirable from the viewpoint of fixation, durability, cooling efficiency, etc. than leaving them in a vacuum state. .

以上の構成において、複数の第１冷却板１３と複数の第２冷却板１４とを介して、複数の超伝導線１２は、超伝導状態になるように冷却される。 In the above configuration, the plurality of superconducting wires 12 are cooled to a superconducting state via the plurality of first cooling plates 13 and the plurality of second cooling plates 14.

《超伝導線の断面構造》
図３は、本発明の第１実施形態に係る伝導冷却型超伝導コイル１における超伝導線１２の断面構造の一例を示す図である。
図３において、超伝導線１２は、超伝導フィラメント１７、第１シース１８、第２シース１９、安定化材（安定化銅）２０を備えて構成される。
超伝導線１２の中心部に、例えば安定化銅で構成される安定化材２０がある。この安定化材２０の外周側に複数の超伝導フィラメント１７が配置される。超伝導フィラメント１７は、例えばＭｇＢ₂（二ホウ化マグネシウム）を含む超伝導体で構成される。
複数の超伝導フィラメント１７は、被覆材である第２シース１９で覆われている。
また、被覆材である第１シース１８は、超伝導線１２の最外殻を覆って、第２シース１９とともに、超伝導フィラメント１７を保護している。《Cross-sectional structure of superconducting wire》
FIG. 3 is a diagram showing an example of the cross-sectional structure of the superconducting wire 12 in the conduction-cooled superconducting coil 1 according to the first embodiment of the present invention.
In FIG. 3, the superconducting wire 12 includes a superconducting filament 17, a first sheath 18, a second sheath 19, and a stabilizing material (stabilized copper) 20.
In the center of the superconducting wire 12 there is a stabilizing material 20 made of, for example, stabilized copper. A plurality of superconducting filaments 17 are arranged on the outer peripheral side of this stabilizing material 20. The superconducting filament 17 is made of a superconductor containing, for example, MgB ₂ (magnesium diboride).
The plurality of superconducting filaments 17 are covered with a second sheath 19 that is a covering material.
Further, the first sheath 18, which is a covering material, covers the outermost shell of the superconducting wire 12 and protects the superconducting filament 17 together with the second sheath 19.

伝導冷却型超伝導コイル１の超伝導線１２における超伝導体が超伝導状態から逸脱するのがクエンチ（超伝導状態から常伝導状態への相転移）である。
導体（超伝導フィラメント１７、もしくは超伝導線１２）がクエンチした場合には、超伝導フィラメント１７が、超伝導状態ではなくなり、高抵抗を示す状態となる。
そのため、超伝導フィラメント１７に流れていた電流が、所定の抵抗を有する安定化材（安定化銅）２０に流れ込むことになり、発熱（抵抗発熱、ジュール熱）が始まる。
ある部分で生じたクエンチによる超伝導線１２の発熱は、超伝導線１２を挟む２枚の第１冷却板１３（図１）、および両隣の超伝導線１２（図１）に伝わる。 Quenching (phase transition from a superconducting state to a normal conducting state) is when the superconductor in the superconducting wire 12 of the conduction-cooled superconducting coil 1 deviates from the superconducting state.
When the conductor (superconducting filament 17 or superconducting wire 12) is quenched, the superconducting filament 17 is no longer in a superconducting state and is in a state exhibiting high resistance.
Therefore, the current flowing through the superconducting filament 17 flows into the stabilizing material (stabilized copper) 20 having a predetermined resistance, and heat generation (resistance heat generation, Joule heat) begins.
The heat generated in the superconducting wire 12 due to the quench generated in a certain portion is transmitted to the two first cooling plates 13 (FIG. 1) that sandwich the superconducting wire 12, and to the superconducting wires 12 on both sides (FIG. 1).

第１冷却板１３によって、導体（超伝導線１２）の温度上昇が抑制されるが、一方では、第１冷却板１３の広い範囲で温度が上昇し、隣接する層の導体（超伝導線１２）を加温することになる。
このようにして、隣の層の複数の導体（超伝導フィラメント１７、もしくは超伝導線１２）が超伝導の臨界温度を越えると、一斉にクエンチを起こすことになる。つまり、超伝導線１２の一部のクエンチによって、超伝導線１２の一部が異常な高温になるのではなく、クエンチが起きた比較的に低温の状態でクエンチが広範囲に広がる。クエンチが広範囲に広がることにより、多くの導体の安定化材（安定化銅）２０に電流が流れるようになって、コイルの抵抗が高くなる。 The temperature rise of the conductor (superconducting wire 12) is suppressed by the first cooling plate 13, but on the other hand, the temperature rises in a wide range of the first cooling plate 13, and the temperature of the conductor (superconducting wire 12) of the adjacent layer is suppressed. ) will be heated.
In this way, when a plurality of conductors (superconducting filaments 17 or superconducting wires 12) in adjacent layers exceed the critical temperature of superconductivity, they all quench at once. In other words, the quenching of a portion of the superconducting wire 12 does not cause the portion of the superconducting wire 12 to reach an abnormally high temperature, but rather the quenching spreads over a wide range in the relatively low temperature state in which the quenching occurs. As the quench spreads over a wide area, current flows through the stabilizing material (stabilizing copper) 20 of many conductors, increasing the resistance of the coil.

超伝導を適用する通常の装置、機器においては、コイル保護のためにクエンチ時、コイルの始点と終点に対応するコイル口出し間電圧を検出して、電源をオフする構成となっている。コイル口出し間の電圧が、電圧の立ち上がりが早くかつ大きいほど、保護が早くなって、コイル温度上昇が抑えられ、コイル損傷の可能性が小さくなる。
すなわち、第１冷却板１３の存在、および第２冷却板１４の存在によりクエンチした導体の温度上昇が抑制される。それとともに、クエンチによる温度上昇が速く広範囲に広がって、コイルの抵抗が高くなり、コイル口出し間電圧が高くなる。そのためクエンチ検出による電源オフも早くなり、コイル損傷の可能性を小さくすることができる。 In order to protect the coil, normal devices and equipment that apply superconductivity are configured to detect the voltage between the coil leads corresponding to the start and end points of the coil and turn off the power when quenching. The faster and larger the voltage rises between the coil leads, the faster the protection is achieved, the coil temperature rise is suppressed, and the possibility of coil damage is reduced.
That is, the presence of the first cooling plate 13 and the second cooling plate 14 suppresses the temperature rise of the quenched conductor. At the same time, the temperature rise due to quenching spreads rapidly over a wide range, the resistance of the coil increases, and the voltage across the coil leads increases. Therefore, the power can be turned off quickly upon quench detection, and the possibility of coil damage can be reduced.

＜第１実施形態の総括＞
本（第１）実施形態の伝導冷却型超伝導コイル１は、図１、図２Ａ、図２Ｂに示したように、コイル状に配列された複数の超伝導線１２の両端に複数の第２冷却板１４を配置し、複数の第１冷却板１３によって前記の複数の超伝導線１２と複数の第２冷却板１４を挟む構成をとっている。
この構成のように、複数の第１冷却板１３が超伝導線１２の各層間に存在することによって、超伝導線１２を速やかに冷却が可能となる。また、一部の超伝導線１２がクエンチを引き起こしても、第１冷却板１３と第２冷却板１４の冷却作用と高い熱伝導性によって、クエンチ時の局所的な温度上昇を緩和して、伝導冷却型超伝導コイル１のコイル損傷が発生しにくい構造となっている。 <Summary of the first embodiment>
As shown in FIGS. 1, 2A, and 2B, the conduction-cooled superconducting coil 1 of the present (first) embodiment has a plurality of second coils at both ends of a plurality of superconducting wires 12 arranged in a coil shape. Cooling plates 14 are arranged, and the plurality of superconducting wires 12 and the plurality of second cooling plates 14 are sandwiched between the plurality of first cooling plates 13.
As in this configuration, by having a plurality of first cooling plates 13 between each layer of the superconducting wire 12, the superconducting wire 12 can be quickly cooled. Furthermore, even if some of the superconducting wires 12 cause quenching, the cooling action and high thermal conductivity of the first cooling plate 13 and the second cooling plate 14 will alleviate the local temperature rise during quenching. The conduction-cooled superconducting coil 1 has a structure in which coil damage is unlikely to occur.

また、前記したように、超伝導線１２と第２冷却板１４を第１冷却板１３で挟む構成であるので、従来例のような銅板を導体（超伝導体）に半田付けをするような工程もなく、低コストで製作できる。
また、本（第１）実施形態の伝導冷却型超伝導コイル１における超伝導線１２は、図３に示したように、超伝導フィラメント１７、第１シース１８、第２シース１９、安定化材（安定化銅）２０を備えて構成されているので、クエンチを引き起こした際にも、伝導冷却型超伝導コイル１のコイル損傷が発生しにくい構造となっている。 Furthermore, as described above, since the superconducting wire 12 and the second cooling plate 14 are sandwiched between the first cooling plate 13, it is not necessary to solder a copper plate to a conductor (superconductor) as in the conventional example. There is no process involved and it can be manufactured at low cost.
Further, as shown in FIG. 3, the superconducting wire 12 in the conduction-cooled superconducting coil 1 of the present (first) embodiment includes a superconducting filament 17, a first sheath 18, a second sheath 19, and a stabilizing material. (stabilized copper) 20, the conduction-cooled superconducting coil 1 is unlikely to be damaged even when quenching occurs.

＜第１実施形態の効果＞
本発明の第１実施形態によれば、クエンチしてもコイル損傷が発生しにくく、また冷却の速い伝導冷却型超伝導コイルを提供できる。また、低コストで製作できる。 <Effects of the first embodiment>
According to the first embodiment of the present invention, it is possible to provide a conduction-cooled superconducting coil that is less susceptible to coil damage even when quenched and that cools quickly. Moreover, it can be manufactured at low cost.

≪第２実施形態≫
本発明の第２実施形態に係る伝導冷却型超伝導コイル１Ｂについて、図４Ａと図４Ｂを参照して説明する。
図４Ａは、本発明の第２実施形態に係る伝導冷却型超伝導コイル１Ｂの中心軸Ｚを含む切断面における断面構造の一例を示す図である。
図４Ａにおいて、伝導冷却型超伝導コイル１Ｂは、ボビン１１、複数の超伝導線１２Ｂ、複数の第１冷却板１３、複数の第２冷却板１４を備えて構成される。
図４Ａにおける伝導冷却型超伝導コイル１Ｂが図１における伝導冷却型超伝導コイル１と異なるのは、超伝導線冷却板積層部３１Ｂにおける超伝導線１２Ｂおよびその近傍（領域３００）の構成である。この超伝導線１２Ｂおよびその近傍である領域３００の構成を次に図４Ｂを参照して説明する。
なお、ボビン１１、複数の第１冷却板１３、複数の第２冷却板１４については、図１で示した第１実施形態の構成と同様であるので、事実上、重複する説明は省略する。 ≪Second embodiment≫
A conduction-cooled superconducting coil 1B according to a second embodiment of the present invention will be described with reference to FIGS. 4A and 4B.
FIG. 4A is a diagram showing an example of a cross-sectional structure of a conduction-cooled superconducting coil 1B in a cut plane including the central axis Z according to the second embodiment of the present invention.
In FIG. 4A, a conduction-cooled superconducting coil 1B includes a bobbin 11, a plurality of superconducting wires 12B, a plurality of first cooling plates 13, and a plurality of second cooling plates 14.
The difference between the conduction-cooled superconducting coil 1B in FIG. 4A and the conduction-cooled superconducting coil 1 in FIG. 1 is the configuration of the superconducting wire 12B and its vicinity (area 300) in the superconducting wire cooling plate stack 31B. . The structure of this superconducting wire 12B and the region 300 in its vicinity will be described next with reference to FIG. 4B.
Note that the bobbin 11, the plurality of first cooling plates 13, and the plurality of second cooling plates 14 are the same as the configuration of the first embodiment shown in FIG. 1, so a redundant explanation will be omitted.

図４Ｂは、本発明の第２実施形態に係る伝導冷却型超伝導コイル１Ｂの超伝導線冷却板積層部３１Ｂにおける超伝導線１２Ｂ、および、その近傍（領域３００：図４Ａ）の構成例を示す図である。
図４Ｂにおいて、超伝導線１２Ｂは、第１ガラスクロス（またはエナメル絶縁）１５に覆われて構成されている。
また、第１ガラスクロス（またはエナメル絶縁）１５に覆われた超伝導線１２Ｂは、二つの第２ガラスクロス（またはＧＦＲＰ（Glass Fiber Reinforced Plastic ：ガラス繊維強化プラスチック））１６を介して、二つの第１冷却板１３に挟まれて構成される。 FIG. 4B shows a configuration example of the superconducting wire 12B in the superconducting wire cooling plate laminated portion 31B of the conduction-cooled superconducting coil 1B according to the second embodiment of the present invention, and its vicinity (region 300: FIG. 4A). FIG.
In FIG. 4B, the superconducting wire 12B is covered with a first glass cloth (or enamel insulation) 15.
Further, the superconducting wire 12B covered with the first glass cloth (or enamel insulation) 15 is connected to the two second glass cloths (or GFRP (Glass Fiber Reinforced Plastic)) 16 through It is configured to be sandwiched between first cooling plates 13.

このように、超伝導線１２Ｂが、第１ガラスクロス（またはエナメル絶縁）１５で覆われることによって、複数の超伝導線１２Ｂ間の絶縁性が向上する。
また、第１ガラスクロス（またはエナメル絶縁）１５に覆われた超伝導線１２Ｂが、二つの第２ガラスクロス（またはＧＦＰＲ）１６を介して、二つの第１冷却板１３に挟まれて構成されることによって、複数の超伝導線１２Ｂと第１冷却板１３との間の絶縁性や耐久性が向上する。 In this way, by covering the superconducting wires 12B with the first glass cloth (or enamel insulation) 15, the insulation between the plurality of superconducting wires 12B is improved.
Further, a superconducting wire 12B covered with a first glass cloth (or enamel insulation) 15 is sandwiched between two first cooling plates 13 via two second glass cloths (or GFPR) 16. By doing so, the insulation and durability between the plurality of superconducting wires 12B and the first cooling plate 13 are improved.

＜第２実施形態の効果＞
第１実施形態の効果に加え、さらに、第１ガラスクロス（またはエナメル絶縁）１５や第２ガラスクロス（またはＧＦＰＲ）１６を備えることによって、さらに超伝導線１２Ｂの絶縁性や耐久性が向上する。 <Effects of the second embodiment>
In addition to the effects of the first embodiment, by providing the first glass cloth (or enamel insulation) 15 and the second glass cloth (or GFPR) 16, the insulation properties and durability of the superconducting wire 12B are further improved. .

≪第３実施形態≫
本発明の第３実施形態に係る伝導冷却型超伝導コイル１Ｃについて、図５を参照して説明する。
図５は、本発明の第３実施形態に係る伝導冷却型超伝導コイル１Ｃの中心軸Ｚを含む切断面における断面構造の一例を示す図である。
図５において、伝導冷却型超伝導コイル１Ｃは、ボビン１１、複数の超伝導線１２、複数の第１冷却板１３、複数の第２冷却板１４を備えて構成される。
図５の構成において、図１の構成と異なるのは、超伝導線１２と第２冷却板１４とに対する第１冷却板１３の配置の構成である。 ≪Third embodiment≫
A conduction-cooled superconducting coil 1C according to a third embodiment of the present invention will be described with reference to FIG. 5.
FIG. 5 is a diagram showing an example of the cross-sectional structure of a conduction-cooled superconducting coil 1C according to the third embodiment of the present invention, taken along a cut plane including the central axis Z.
In FIG. 5, a conduction-cooled superconducting coil 1C includes a bobbin 11, a plurality of superconducting wires 12, a plurality of first cooling plates 13, and a plurality of second cooling plates 14.
The configuration in FIG. 5 differs from the configuration in FIG. 1 in the arrangement of the first cooling plate 13 with respect to the superconducting wire 12 and the second cooling plate 14.

すなわち、超伝導線冷却板積層部３１Ｃにおける超伝導線１２の積層を二段構成、および第２冷却板１４の積層を二段構成とし、これらの構成に対して、二つの第１冷却板１３で挟む構成としている。つまり、積層された超伝導線１２の間に、第１冷却板１３が存在しない層がある。
同様に冷却板積層部３２Ｃにおいて、積層された第２冷却板１４の間に、第１冷却板１３が存在しない層がある。
図５においては、上段から２層は、前記した積層された超伝導線１２の間、および積層された第２冷却板１４の間に第１冷却板１３が存在しない層となっている。
ただし、ボビン１１に最も近い層は、図１と同じように、超伝導線１２の一段構成、および第２冷却板１４の一段構成に対して、二つの第１冷却板１３で挟む構成としている。 That is, the superconducting wires 12 are stacked in a two-stage configuration in the superconducting wire cooling plate stacked portion 31C, and the second cooling plates 14 are stacked in a two-stage configuration, and for these configurations, two first cooling plates 13 It is structured so that it is sandwiched between. That is, there is a layer in which the first cooling plate 13 does not exist between the stacked superconducting wires 12 .
Similarly, in the cooling plate stacked portion 32C, there is a layer in which the first cooling plate 13 does not exist between the stacked second cooling plates 14.
In FIG. 5, the two layers from the top are layers in which the first cooling plates 13 are not present between the stacked superconducting wires 12 and between the stacked second cooling plates 14.
However, the layer closest to the bobbin 11 is sandwiched between two first cooling plates 13, as in FIG. .

伝導冷却型超伝導コイル（１Ｃ）の通電電流、超伝導線１２の性能、およびコイル形状により、伝導冷却型超伝導コイル（１Ｃ）のクエンチのしやすさや温度上昇程度が変わってくる。そのため、伝導冷却型超伝導コイル（１Ｃ）によっては、必ずしも各層に冷却板（第１冷却板１３）を設置する必要はない。
また、コイル（超伝導コイル）内部においても、コイルの内周側と外周側とでは、発生する磁場（経験磁場）の強度が異なっていることや、冷却構造上の制約から温度分布が異なってくる場合がある。その相違によって第１冷却板１３の必要性も影響を受け、配置箇所を低減できる場合がある。 The ease with which the conduction-cooled superconducting coil (1C) can be quenched and the degree of temperature rise vary depending on the current flowing through the conduction-cooled superconducting coil (1C), the performance of the superconducting wire 12, and the shape of the coil. Therefore, depending on the conduction-cooled superconducting coil (1C), it is not necessarily necessary to install a cooling plate (first cooling plate 13) in each layer.
Also, inside the coil (superconducting coil), the strength of the generated magnetic field (experienced magnetic field) differs between the inner and outer sides of the coil, and the temperature distribution differs due to constraints on the cooling structure. There may be cases where The necessity of the first cooling plate 13 is affected by the difference, and the number of locations to be provided may be reduced.

＜第３実施形態の効果＞
冷却板（第１冷却板１３）の構成を最適化することによって、伝導冷却型超伝導コイル（１Ｃ）の形状の最適化（小型化）やコストを低減できる効果がある。 <Effects of the third embodiment>
By optimizing the configuration of the cooling plate (first cooling plate 13), the shape of the conduction-cooled superconducting coil (1C) can be optimized (miniaturized) and the cost can be reduced.

≪第４実施形態≫
本発明の第４実施形態に係る伝導冷却型超伝導コイル１Ｄについて、図６を参照して説明する。
図６は、本発明の第４実施形態に係る伝導冷却型超伝導コイル１Ｄの中心軸Ｚ方向に垂直な切断面における断面構造の一例を示す図である。
図６において、伝導冷却型超伝導コイル１Ｄは、ボビン１１、複数の第１冷却板１３、複数の第２冷却板１４、複数の超伝導線１２を備えて構成される。また、第１冷却板１３および第２冷却板１４は、それぞれ分断される箇所があり、その分断箇所がギャップ２１として示されている。
図６の断面図は、図２の断面図と、ギャップ２１を除いて似た構成であるが、断面の切断位置が異なる。そのため、図６においては、複数の第１冷却板１３と複数の第２冷却板１４が主として示されており、第１冷却板１３および第２冷却板１４のそれぞれの隙間であるギャップ２１において、複数の超伝導線１２が覗いて見えている。 ≪Fourth embodiment≫
A conduction-cooled superconducting coil 1D according to a fourth embodiment of the present invention will be described with reference to FIG. 6.
FIG. 6 is a diagram showing an example of the cross-sectional structure of a conduction-cooled superconducting coil 1D according to the fourth embodiment of the present invention, taken on a cut plane perpendicular to the central axis Z direction.
In FIG. 6, a conduction-cooled superconducting coil 1D includes a bobbin 11, a plurality of first cooling plates 13, a plurality of second cooling plates 14, and a plurality of superconducting wires 12. Further, each of the first cooling plate 13 and the second cooling plate 14 has a part where they are separated, and the part where they are separated is shown as a gap 21.
The cross-sectional view of FIG. 6 has a similar configuration to the cross-sectional view of FIG. 2 except for the gap 21, but the cutting position of the cross section is different. Therefore, in FIG. 6, the plurality of first cooling plates 13 and the plurality of second cooling plates 14 are mainly shown, and in the gaps 21 between the first cooling plates 13 and the second cooling plates 14, A plurality of superconducting wires 12 are visible.

図６においては、複数の第１冷却板１３、および複数の第２冷却板１４が、２箇所のギャップ２１（分断箇所）によって、周方向に２分割されて、伝導冷却型超伝導コイル１Ｄが構成されている。
図６に示すように、複数の第１冷却板１３、複数の第２冷却板１４を分割することによって、コイル製作を容易にすることができる。
また、複数の第１冷却板１３、複数の第２冷却板１４を分割することによって、伝導冷却型超伝導コイル１Ｄの励磁時に誘起される循環電流が冷却板に流れることを防止できる。つまり、循環電流が冷却板に流れることを防止することによって、伝導冷却型超伝導コイル１Ｄの定格電流の通電時において、磁場の静定に支障が出ることを避けることが可能となる。
なお、ギャップ２１の分割数、およびギャップ幅は、製作性や伝導冷却型超伝導コイルの各種の特性などから決定される。 In FIG. 6, a plurality of first cooling plates 13 and a plurality of second cooling plates 14 are divided into two in the circumferential direction by two gaps 21 (divided points), and a conduction-cooled superconducting coil 1D is formed. It is configured.
As shown in FIG. 6, coil manufacturing can be facilitated by dividing the plurality of first cooling plates 13 and the plurality of second cooling plates 14.
Further, by dividing the plurality of first cooling plates 13 and the plurality of second cooling plates 14, it is possible to prevent circulating current induced during excitation of the conduction-cooled superconducting coil 1D from flowing to the cooling plates. In other words, by preventing the circulating current from flowing through the cooling plate, it is possible to avoid problems in stabilizing the magnetic field when the rated current is applied to the conduction-cooled superconducting coil 1D.
Note that the number of divisions of the gap 21 and the gap width are determined based on manufacturability and various characteristics of the conduction-cooled superconducting coil.

＜第４実施形態の効果＞
冷却板を分割することによって、伝導冷却型超伝導コイル１Ｄの製作が容易になる効果がある。
また、循環電流が冷却板に流れることを防止できるので、伝導冷却型超伝導コイル１Ｄの安定動作に効果がある。 <Effects of the fourth embodiment>
Dividing the cooling plate has the effect of making it easier to manufacture the conduction-cooled superconducting coil 1D.
Further, since circulating current can be prevented from flowing to the cooling plate, it is effective for stable operation of the conduction-cooled superconducting coil 1D.

≪第５実施形態≫
本発明の第５実施形態に係る伝導冷却型超伝導コイルについて、図１を兼用して説明する。
第５実施形態の伝導冷却型超伝導コイル（１）は、図１における冷却板積層部３２Ａのコイル軸方向の長さの寸法ｅ１と冷却板積層部３２Ｂのコイル軸方向の長さの寸法ｅ２とが異なる場合である。具体的には、冷却板積層部３２Ｂ（第２の冷却板積層部）のコイル軸方向の長さの寸法ｅ２を、冷却板積層部３２Ａのコイル軸方向の長さの寸法ｅ１よりも短くする。
ただし、冷却板積層部３２Ａのコイル軸方向の長さの寸法ｅ１は、冷却板積層部３２Ａの厚さの寸法ａと概ね等しく設定する。なお、前記したように、冷却板積層部３２Ａの厚さの寸法ａは、超伝導線冷却板積層部３１の厚さの寸法ｂと等しくしておく。 ≪Fifth embodiment≫
A conduction-cooled superconducting coil according to a fifth embodiment of the present invention will be described with reference to FIG.
The conduction-cooled superconducting coil (1) of the fifth embodiment has a dimension e1 in the coil axial direction of the cooling plate laminated portion 32A and a dimension e2 in the coil axial direction of the cooling plate laminated portion 32B in FIG. This is a case where they are different. Specifically, the length e2 of the cooling plate laminated portion 32B (second cold plate laminated portion) in the coil axial direction is made shorter than the length e1 of the cooling plate laminated portion 32A in the coil axial direction. .
However, the length e1 of the cooling plate laminated portion 32A in the coil axial direction is set approximately equal to the thickness dimension a of the cooling plate laminated portion 32A. Note that, as described above, the thickness dimension a of the cooling plate laminated portion 32A is made equal to the thickness dimension b of the superconducting wire cooling plate laminated portion 31.

すなわち、本（第５）実施形態の伝導冷却型超伝導コイルにおいては、冷却板積層部３２Ｂのコイル軸方向の長さの寸法ｅ２を短くするものである。つまり、冷却板積層部３２Ｂにおける第２冷却板１４の長さを短くする。
本（第５）実施形態の伝導冷却型超伝導コイルにおいては、外部の冷凍機からの冷却板等による冷却を主として、冷却板積層部３２Ａを介して行う。そのため、冷却板積層部３２Ｂのコイル軸方向の長さの寸法ｅ２を、冷却板積層部３２Ａ側と同程度の長さに確保する必要がない。この冷却板積層部３２Ｂのコイル軸方向の長さの寸法ｅ２を短くする構成によって、第２冷却板１４と第１冷却板１３の量を減らして、製作コストを低減する。 That is, in the conduction-cooled superconducting coil of the present (fifth) embodiment, the dimension e2 of the length of the cooling plate laminated portion 32B in the coil axial direction is shortened. That is, the length of the second cooling plate 14 in the cooling plate stacked portion 32B is shortened.
In the conduction-cooled superconducting coil of the present (fifth) embodiment, cooling by a cooling plate or the like from an external refrigerator is mainly performed via the cooling plate laminated portion 32A. Therefore, it is not necessary to ensure that the length e2 of the cooling plate laminated portion 32B in the coil axial direction is approximately the same as the length on the cooling plate laminated portion 32A side. By reducing the length e2 of the cooling plate laminated portion 32B in the coil axial direction, the quantities of the second cooling plate 14 and the first cooling plate 13 are reduced, thereby reducing manufacturing costs.

＜第５実施形態の効果＞
冷却板の量を減らして、製作コストが低減できる。 <Effects of the fifth embodiment>
By reducing the amount of cooling plates, manufacturing costs can be reduced.

≪第６実施形態≫
本発明の第６実施形態に係る伝導冷却型超伝導コイルについて、図１を兼用して説明する。
第６実施形態の伝導冷却型超伝導コイルにおいては、第１冷却板１３を第２冷却板１４にボルト（不図示）で固定する。前記した樹脂含侵と併せて、冷却板をさらに強固に固定できる。 ≪Sixth embodiment≫
A conduction-cooled superconducting coil according to a sixth embodiment of the present invention will be described with reference to FIG.
In the conduction-cooled superconducting coil of the sixth embodiment, the first cooling plate 13 is fixed to the second cooling plate 14 with bolts (not shown). In combination with the resin impregnation described above, the cooling plate can be fixed even more firmly.

＜第６実施形態の効果＞
冷却板を強固に固定できる。 <Effects of the sixth embodiment>
The cooling plate can be firmly fixed.

≪その他の実施形態≫
なお、本発明は、以上に説明した実施形態に限定されるものでなく、さらに様々な変形例が含まれる。例えば、前記の実施形態は、本発明を分かりやすく説明するために、詳細に説明したものであり、必ずしも説明したすべての構成を備えるものに限定されるものではない。また、ある実施形態の構成の一部を他の実施形態の構成の一部で置き換えることが可能であり、さらに、ある実施形態の構成に他の実施形態の構成の一部または全部を追加・削除・置換をすることも可能である。
以下に、その他の実施形態や変形例について、さらに説明する。 ≪Other embodiments≫
Note that the present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above are described in detail in order to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Further, it is possible to replace a part of the configuration of one embodiment with a part of the configuration of another embodiment, and furthermore, it is possible to add or add part or all of the configuration of another embodiment to the configuration of one embodiment. It is also possible to delete or replace.
Other embodiments and modifications will be further described below.

《超伝導線》
図１において、超伝導線１２の断面形状を円形の場合を示して説明した。しかし、超伝導線１２の断面形状は、円形に限定されない。例えば、断面形状が、楕円形や四角形、それ以上の多角の形状であってもよい。《Superconducting wire》
In FIG. 1, the case where the cross-sectional shape of the superconducting wire 12 is circular is shown and explained. However, the cross-sectional shape of the superconducting wire 12 is not limited to a circular shape. For example, the cross-sectional shape may be an ellipse, a quadrangle, or a polygon.

《超伝導体》
第１実施形態においては、図３に示した超伝導フィラメント１７は、例えばＭｇＢ₂（二ホウ化マグネシウム）を含む超伝導体であると説明したが、超伝導体は、ＭｇＢ₂に限定されない。
例えば、ニオブチタン(ＮｂＴｉ)、ニオブ酸スズ(Ｎｂ₃Ｓｎ)、ビスマス系超電導体(ＢＳＣＣＯ)、イットリウム系超電導体(ＹＢＣＯ)などの超伝導体であっても、本（第１）実施形態の伝導冷却型超伝導コイルは、同じような効果が期待できることがある。《Superconductor》
In the first embodiment, it has been explained that the superconducting filament 17 shown in FIG. 3 is a superconductor containing, for example, MgB ₂ (magnesium diboride), but the superconductor is not limited to MgB ₂ .
For example, even if a superconductor such as niobium titanium (NbTi), tin niobate (Nb ₃ Sn), bismuth-based superconductor (BSCCO), or yttrium-based superconductor (YBCO) is used, the conduction of this (first) embodiment Similar effects may be expected from cooled superconducting coils.

《冷却板の段構成》
図５で示した第３実施形態においては、超伝導線１２の二段構成、および第２冷却板１４の二段構成に対して、二つの第１冷却板１３で挟む構成の例を示したが、超伝導線１２と第２冷却板１４の段構成は、前記の二段構成には限定されない。三段構成でもよい。
また、図１に示した一段構成と図５で示した二段構成を混在させてもよい。
また、伝導冷却型超伝導コイル１Ｃの外周側か内周側かによって、超伝導線１２の多段構成の段数が変化してもよい。《Cooling plate stage configuration》
In the third embodiment shown in FIG. 5, an example is shown in which the superconducting wire 12 has a two-stage configuration and the second cooling plate 14 has a two-stage configuration, but is sandwiched between two first cooling plates 13. However, the stage configuration of the superconducting wire 12 and the second cooling plate 14 is not limited to the two-stage configuration described above. A three-tier configuration may also be used.
Further, the one-stage configuration shown in FIG. 1 and the two-stage configuration shown in FIG. 5 may be used together.
Furthermore, the number of stages in the multi-stage structure of the superconducting wire 12 may vary depending on whether the conduction-cooled superconducting coil 1C is on the outer circumferential side or the inner circumferential side.

《冷却板の分割数》
図６で示した第４実施形態においては、複数の第１冷却板１３、および複数の第２冷却板１４を周方向に２分割にする例を示した。しかし、２分割に限定されない。
例えば４分割でも６分割でもよい。一般に２分割以上で同様の効果が期待できる。《Number of cooling plate divisions》
In the fourth embodiment shown in FIG. 6, an example is shown in which the plurality of first cooling plates 13 and the plurality of second cooling plates 14 are divided into two in the circumferential direction. However, it is not limited to two divisions.
For example, it may be divided into four or six parts. Generally, similar effects can be expected by dividing into two or more.

《冷却板積層部》
図１で示した第１実施形態の伝導冷却型超伝導コイル１において、複数の第２冷却板１４は、複数（複数本）の超伝導線１２がコイル軸方向に配列された端の両側に設けられ、複数の第１冷却板１３が複数（複数本）の超伝導線１２と複数の第２冷却板１４を挟むように構成している例を示した。しかし、複数の第２冷却板１４が、複数（複数本）の超伝導線１２がコイル軸方向に配列された両側に設けられることに限定されない。
複数の第２冷却板１４（あるいは冷却板積層部３２）が、複数（複数本）の超伝導線１２がコイル軸方向に配列された端のどちらか一方の側であってもよい。
すなわち、超伝導線冷却板積層部３１に対して、超伝導線冷却板積層部３１のどちらか一方の端のみに、冷却板積層部３２を備える構成であってもよい。
この構成によっても、複数の第１冷却板１３と複数の第２冷却板１４とによって、複数（複数本）の超伝導線１２を冷却することが可能である。《Cooling plate stack section》
In the conduction-cooled superconducting coil 1 of the first embodiment shown in FIG. 1, the plurality of second cooling plates 14 are arranged on both sides of the end where the plurality of superconducting wires 12 are arranged in the coil axial direction. An example is shown in which the plurality of first cooling plates 13 are configured to sandwich a plurality of superconducting wires 12 and a plurality of second cooling plates 14. However, the plurality of second cooling plates 14 are not limited to being provided on both sides of the plurality of superconducting wires 12 arranged in the coil axial direction.
The plurality of second cooling plates 14 (or the cooling plate laminated portion 32) may be on either side of an end where a plurality of (multiple) superconducting wires 12 are arranged in the coil axial direction.
That is, the superconducting wire cooling plate laminated portion 31 may be provided with the cooling plate laminated portion 32 only at one end of the superconducting wire cooling plate laminated portion 31 .
Also with this configuration, it is possible to cool a plurality of superconducting wires 12 using a plurality of first cooling plates 13 and a plurality of second cooling plates 14 .

《第１冷却板、第２冷却板》
本発明の第１実施形態の伝導冷却型超伝導コイル１を示す図１において、第１冷却板１３と第２冷却板１４は、銅で形成されていることを例示した。しかし、第１冷却板１３および第２冷却板は、銅による構成に限定されない。熱伝導度が高い特性を有する材質（金属）であれば、銅以外の他の材質でもよい。例えば、アルミニウムや前記特性を有する合金でもよい。《First cooling plate, second cooling plate》
In FIG. 1 showing the conduction-cooled superconducting coil 1 according to the first embodiment of the present invention, the first cooling plate 13 and the second cooling plate 14 are made of copper. However, the first cooling plate 13 and the second cooling plate are not limited to being made of copper. Any material other than copper may be used as long as the material (metal) has high thermal conductivity. For example, aluminum or an alloy having the above characteristics may be used.

《安定化材》
本発明の第１実施形態を示す図３において、安定化材２０は、安定化銅で形成されていることを例示した。しかし、安定化材２０は、銅による構成に限定されない。熱伝導率が高く、電気抵抗が低い材質（金属）であれば他の材質でもよい。例えば、アルミニウムや前記特性を有する合金でもよい。《Stabilizing material》
In FIG. 3 showing the first embodiment of the present invention, the stabilizing material 20 is made of stabilized copper. However, the stabilizing material 20 is not limited to being made of copper. Other materials may be used as long as they have high thermal conductivity and low electrical resistance (metal). For example, aluminum or an alloy having the above characteristics may be used.

《第１ガラスクロス、第２ガラスクロス》
本発明の第２実施形態を示す図４において、第１ガラスクロス１５、第２ガラスクロス１６を共に用いた構成で説明したが、第１ガラスクロス１５のみ、あるいは第２ガラスクロス１６のみの構成でも、第１実施形態よりは絶縁性が向上する効果がある。
また、第１ガラスクロス１５の代わりにエナメル絶縁でもよく、第２ガラスクロス１６の代わりにＧＦＰＲを用いてもよい。
また、エナメル絶縁とＧＦＰＲの組み合わせた構成でもよい。
なお、第１ガラスクロス１５（またはエナメル絶縁）、第２ガラスクロス１６（またはＧＦＰＲ）の材質の特性は、絶縁性が高く、熱伝導率が大きいものが望ましい。《First glass cloth, second glass cloth》
In FIG. 4 showing the second embodiment of the present invention, a configuration using both the first glass cloth 15 and the second glass cloth 16 has been described, but a configuration using only the first glass cloth 15 or only the second glass cloth 16 has been described. However, it has the effect of improving insulation properties compared to the first embodiment.
Furthermore, enamel insulation may be used instead of the first glass cloth 15, and GFPR may be used instead of the second glass cloth 16.
Alternatively, a combination of enamel insulation and GFPR may be used.
Note that it is desirable that the materials of the first glass cloth 15 (or enamel insulation) and the second glass cloth 16 (or GFPR) have high insulation properties and high thermal conductivity.

《第２実施形態と第３実施形態の組み合わせ》
第３実施形態においては、第１実施形態で説明した超伝導線１２を用いて、超伝導線１２の二段構成に対して、二つの第１冷却板１３で挟む構成を示した。
しかし、第３実施形態の超伝導線１２の二段構成において、図４Ａ、図４Ｂで示した第２実施形態の領域３００の構成における超伝導線１２Ｂの構成を用いてもよい。
すなわち、図５で示す第３実施形態の超伝導線１２を、図４Ａ、図４Ｂに示す超伝導線１２Ｂのように、超伝導線を第１ガラスクロス（またはエナメル絶縁）１５で包んでもよい。また、二つの超伝導線の間に第２ガラスクロス（またはＧＦＰＲ）１６を設けてもよい。《Combination of the second embodiment and the third embodiment》
In the third embodiment, using the superconducting wire 12 described in the first embodiment, a configuration in which the superconducting wire 12 is sandwiched between two first cooling plates 13 is shown in contrast to the two-stage configuration of the superconducting wire 12.
However, in the two-stage configuration of the superconducting wire 12 of the third embodiment, the configuration of the superconducting wire 12B in the configuration of the region 300 of the second embodiment shown in FIGS. 4A and 4B may be used.
That is, the superconducting wire 12 of the third embodiment shown in FIG. 5 may be wrapped with a first glass cloth (or enamel insulation) 15 like the superconducting wire 12B shown in FIGS. 4A and 4B. . Further, a second glass cloth (or GFPR) 16 may be provided between the two superconducting wires.

《ボビン》
第１実施形態において、図１および図２に示したボビン１１を「筒状（円筒状）」として説明したが、ボビン１１は、筒状に限定されない。例えば、中心部に空洞のない「棒状」の構成であってもよい。また、筒状の周辺部に対して、異なる材質の部材を中心部に備える構成であってもよい。《Bobbin》
In the first embodiment, the bobbin 11 shown in FIGS. 1 and 2 has been described as having a "cylindrical shape," but the bobbin 11 is not limited to a cylindrical shape. For example, it may have a "rod-like" configuration without a cavity in the center. Further, a structure may be adopted in which a member made of a different material is provided in the center part with respect to the cylindrical peripheral part.

《伝導冷却型超伝導コイルの応用》
本発明の第１実施形態～第４実施形態で説明した伝導冷却型超伝導コイルは、例えば、超伝導電磁石装置（超電導電磁石装置）や超伝導エネルギー貯蔵装置や磁気共鳴画像装置（ＭＲＩ）などに適用、応用することができる。《Application of conduction-cooled superconducting coil》
The conduction-cooled superconducting coil described in the first to fourth embodiments of the present invention can be used, for example, in a superconducting electromagnet device (superconducting electromagnet device), a superconducting energy storage device, a magnetic resonance imaging device (MRI), etc. Can be applied and applied.

１，１Ｂ，１Ｃ，１Ｄ伝導冷却型超伝導コイル
１１ボビン
１２，１２Ｂ超伝導線
１３冷却板、第１冷却板
１４冷却板、第２冷却板
１５ガラスクロス、第１ガラスクロス、エナメル絶縁
１６ガラスクロス、第２ガラスクロス、ＧＦＲＰ
１７超伝導フィラメント
１８シース（被覆材）、第１シース
１９シース（被覆材）、第２シース
２０安定化材、安定化銅
２１ギャップ（切断箇所）
３１，３１Ｂ，３１Ｃ超伝導線冷却板積層部
３２，３２Ａ，３２Ｃ冷却板積層部
３２Ｂ冷却板積層部、第２の冷却板積層部 1, 1B, 1C, 1D Conduction-cooled superconducting coil 11 Bobbin 12, 12B Superconducting wire 13 Cooling plate, first cooling plate 14 Cooling plate, second cooling plate 15 Glass cloth, first glass cloth, enamel insulation 16 Glass Cross, second glass cloth, GFRP
17 Superconducting filament 18 Sheath (covering material), first sheath 19 Sheath (covering material), second sheath 20 Stabilizing material, stabilized copper 21 Gap (cutting point)
31, 31B, 31C Superconducting wire cooling plate lamination part 32, 32A, 32C Cooling plate lamination part 32B Cooling plate lamination part, second cooling plate lamination part

Claims

A superconducting wire having a superconducting material and having a coil shape,
a bobbin around which the superconducting wire is wound;
a plurality of first cooling plates disposed to sandwich each layer stacked in the radial direction of the coiled superconducting wire wound around the bobbin and arranged in layers in the axial direction and radial direction of the coiled wire; ,
The first cooling plate is disposed on the outer side of the superconducting wire in the axial direction at at least one of the ends where the superconducting wires are arranged as a plurality of layers in each of the coiled radially laminated layers of the superconducting wire. a plurality of second cooling plates arranged to be sandwiched between them ;
Equipped with
The length of the first cooling plate in the axial direction of the coiled superconducting wire is a superconducting wire cooling plate laminated with the superconducting wire arranged in layers and a plurality of the first cooling plates. The first cooling plate is formed with a dimension that is greater than or equal to the sum of the axial length of the coiled layer of the laminated portion and the axial length of the coiled second cooling plate, and the first cooling plate has a plurality of covering the superconducting wire and the plurality of second cooling plates,
The second cooling plate has a dimension in which the thickness of one layer in the radial direction of the coiled superconducting wire is equal to the length in the radial direction of one layer of the superconducting wire,
The length of the coiled superconducting wire of the second cooling plate in the axial direction is equal to the thickness of the cooling plate stacked portion in which a plurality of the first cooling plates and a plurality of the second cooling plates are laminated. dimensions equal to
The superconducting wire, the plurality of first cooling plates, and the plurality of second cooling plates are integrated with resin,
A conduction-cooled superconducting coil characterized by:

In claim 1,
The thickness dimension of the superconducting wire cooling plate laminated portion is equal to the thickness dimension of the cooling plate laminated portion,
A conduction-cooled superconducting coil characterized by:

In claim 1,
The cooling plate laminated portion is provided at both ends of the superconducting wire cooling plate laminated portion in the axial direction of the coiled superconducting wire ,
A conduction-cooled superconducting coil characterized by:

In claim 3,
The two cooling plate laminated parts provided at both ends of the superconducting wire cold plate laminated part have equal lengths in the axial direction of the coiled shape.
A conduction-cooled superconducting coil characterized by:

In claim 1,
a second cooling plate stacking section in which a plurality of the first cooling plates and a plurality of the second cooling plates are stacked;
The length dimension in the axial direction of the coiled shape of the second cooling plate laminated portion is shorter than the length dimension in the axial direction of the coiled shape of the cooling plate laminated portion,
A conduction-cooled superconducting coil characterized by:

In claim 1,
The superconducting wires of each layer are alternately sandwiched between the plurality of first cooling plates,
A conduction-cooled superconducting coil characterized by:

In claim 1,
The superconducting wires are arranged to be alternately sandwiched between the plurality of first cooling plates each time the superconducting wires are stacked in two layers.
A conduction-cooled superconducting coil characterized by:

In claim 1,
The first cooling plate and the second cooling plate each have a dividing point in the circumferential direction of the coiled superconducting wire, and have a structure in which a circulating current does not flow in the circumferential direction.
A conduction-cooled superconducting coil characterized by:

In claim 1,
the first cooling plate and the second cooling plate in the cooling plate stacking section are fixed with bolts;
A conduction-cooled superconducting coil characterized by:

In claim 1,
The superconducting wire is a high temperature superconducting wire,
A conduction-cooled superconducting coil characterized by:

In claim 1,
The superconducting wire has magnesium diboride,
A conduction-cooled superconducting coil characterized by:

In claim 1,
The superconducting wire includes a superconducting filament, a stabilizing material, and a sheath material.
A conduction-cooled superconducting coil characterized by:

In claim 1,
The superconducting wire is provided with glass cloth or enamel insulation,
A conduction-cooled superconducting coil characterized by:

In claim 1,
A glass cloth or glass fiber reinforced plastic is provided between the superconducting wire and the first cooling plate.
A conduction-cooled superconducting coil characterized by: