JPH03217009A - Hybrid superconducting coil - Google Patents
Hybrid superconducting coilInfo
- Publication number
- JPH03217009A JPH03217009A JP2012125A JP1212590A JPH03217009A JP H03217009 A JPH03217009 A JP H03217009A JP 2012125 A JP2012125 A JP 2012125A JP 1212590 A JP1212590 A JP 1212590A JP H03217009 A JPH03217009 A JP H03217009A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- superconducting
- hybrid
- magnetic field
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002085 persistent effect Effects 0.000 claims description 19
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229910020012 Nb—Ti Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000002887 superconductor Substances 0.000 claims 1
- 238000005481 NMR spectroscopy Methods 0.000 description 3
- 230000009469 supplementation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910000657 niobium-tin Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はハイブリッド超電導コイル、特に磁場安定度の
高いハイブリッド超電導コイルに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hybrid superconducting coil, and particularly to a hybrid superconducting coil with high magnetic field stability.
８Ｔ以上の高磁場を得るための超電導コイルでは、２個
以上の超電導コイルを組み合わせたノ１イブリッド超電
導コイル（以下、ハイブリッドコイルと言う）が用いら
れる。例えば第２図に示すように、ハイブリッドコイル
１０は同軸に２つの超電導コイル、即ち内側に高磁場用
超電導コイル１、外側に低磁場用超電導コイル２を配置
し、各コイルの超電導線材の一端を接続部３で接続して
構成される。これを電源５に接続し、電源５と並列に永
久電流スイッチ４を接続して用いる。As a superconducting coil for obtaining a high magnetic field of 8T or more, a hybrid superconducting coil (hereinafter referred to as a hybrid coil), which is a combination of two or more superconducting coils, is used. For example, as shown in FIG. 2, the hybrid coil 10 has two superconducting coils coaxially arranged, that is, a superconducting coil 1 for high magnetic fields on the inside and a superconducting coil 2 for low magnetic fields on the outside, and one end of the superconducting wire of each coil is arranged. It is configured by being connected at a connecting part 3. This is connected to a power source 5, and a persistent current switch 4 is connected in parallel with the power source 5 for use.
ハイブリッドコイルでは多くの場合各単位コイル間の電
気的連結を線材のかしめ、ノ＼ンダ付け等の常電導接続
で行っている。常電導接続部の抵抗による永久電流の減
衰は、電源からの電流補給により補うことができる。し
かし核磁気共鳴分析装置のように高い磁場安定度を必要
とする場合には、電流補給を避けあるいは最小限に抑え
るため、ハイブリッドコイル間の接続抵抗を特に小さく
する必要がある。複数の単位コイルに同種線材、例えば
Ｎｂ３Ｓｎ線を、用いたハイブリッドコイルでは、コイ
ル間の接続を超電導接続とすることができる。これに対
し、単位コイルの一つは化合物系超電導線、他方は合金
系超電Ｓ線を用いているような場合、超電導接続は困難
である。超電導接続が困難なハイブリッドコイルで常電
導による接続部の抵抗を小さくするために、従来はハン
ダ付け接続部分を長くする等の工夫をしていた。In many cases, in hybrid coils, the electrical connection between each unit coil is performed by normal conductive connection such as caulking or soldering of wire rods. The attenuation of the persistent current due to the resistance of the normally conducting connection can be compensated for by current supplementation from the power supply. However, in cases where high magnetic field stability is required, such as in a nuclear magnetic resonance analyzer, the connection resistance between the hybrid coils must be particularly small in order to avoid or minimize current supplementation. In a hybrid coil in which a plurality of unit coils are made of the same type of wire, for example, Nb3Sn wire, the connection between the coils can be a superconducting connection. On the other hand, when one of the unit coils uses a compound superconducting wire and the other uses an alloy superconducting S wire, superconducting connection is difficult. In hybrid coils, where superconducting connections are difficult, conventional methods have been used to reduce the resistance of the normal conductive connections by making the soldered connections longer.
しかしハイブリッドコイルで単位コイル間を常電導接続
とした場合には、上記のような工夫をしたとしても、本
質的には永久電流閉ループが形成されないので、高磁場
を維持するために電流補給に依存する度合いが大きくな
り、磁場を安定に保ちにくい。However, in the case of a hybrid coil with a normally conductive connection between unit coils, even if the above measures are taken, a persistent current closed loop will not essentially be formed, so it will depend on current replenishment to maintain a high magnetic field. The magnetic field becomes more stable, making it difficult to maintain a stable magnetic field.
単位コイルの一つには比較的安価な線材を用いてもよい
用途であっても、前述した超電導接続のために、全ての
コイルの線材を同じにすると、ハイブリッドコイルのコ
ストが高くなる。また、同種超電導材料を用いたハイブ
リッドコイルでも、単位コイルの線材の断面形状が異な
る場合には、これらの線材間の超電導接続が困難になる
。核磁気共鳴分析装置では、高い磁気安定度が求められ
るので、常電導接続部に基づく磁気安定度の低下を防ぐ
ことが要求されている。Even in applications where a relatively inexpensive wire material can be used for one of the unit coils, if the same wire material is used for all the coils for the above-mentioned superconducting connection, the cost of the hybrid coil increases. Furthermore, even in hybrid coils using the same type of superconducting material, if the wire rods of the unit coils have different cross-sectional shapes, it becomes difficult to make superconducting connections between these wire rods. Since nuclear magnetic resonance analyzers require high magnetic stability, it is required to prevent a decrease in magnetic stability due to normally conducting connections.
従って本発明の目的は、コストが安《、すぐれた磁場安
定度を得ることができるハイブリッド超電導コイルの提
供にある。Therefore, an object of the present invention is to provide a hybrid superconducting coil that is inexpensive and can provide excellent magnetic field stability.
上記目的を達成するため、本発明では、２個以上の超電
導単位コイルから成るハイブリッドコイルにおいて、単
位コイル毎に永久電流閉ループを形成するようにした。In order to achieve the above object, in the present invention, in a hybrid coil consisting of two or more superconducting unit coils, a persistent current closed loop is formed for each unit coil.
例えばハイブリッドコイルを構成する２個の単位コイル
のうち、１個はＮｂ．Ｓｎ線を用いたものであり、１個
はＮｂ−Ｔｉ合金線を用いたものであり、それぞれの単
位コイルについて独立した永久電流閉ループを形成させ
る。なお、同種線材で構成された２以上の超電導コイル
は、外見上別のコイルであっても本発明では一つの単位
コイルとみなす。For example, one of the two unit coils constituting the hybrid coil is Nb. One uses a Sn wire, and one uses an Nb-Ti alloy wire, and an independent persistent current closed loop is formed for each unit coil. Note that two or more superconducting coils made of the same type of wire are regarded as one unit coil in the present invention even if they appear to be different coils.
本発明では、ハイブリッドコイルにおいて、単位コイル
毎に永久電流閉ループを形成したので、単位コイル間に
常電導接続を用いた部分が介在しないから、接続部の抵
抗に起因する永久電流の減衰がなくなる。従って電流補
給の必要が最小限に抑えられ、高い磁場安定度が得られ
る。In the present invention, in the hybrid coil, a persistent current closed loop is formed for each unit coil, so there is no part using a normally conductive connection between the unit coils, so there is no attenuation of the persistent current due to the resistance of the connection part. The need for current supplementation is thus minimized and high field stability is achieved.
以下、実施例により本発明をさらに詳細に説明する。Hereinafter, the present invention will be explained in more detail with reference to Examples.
〔実施例１〕
第１図に断面を示すように、ハイブリ・ンドコイル１０
を高磁場用超電導コイル１１を内側に、低磁場用超電導
コイル１２を外側に、同軸に配置して構成した。高磁場
用超電導コイル１１に電源１５と永久電流スイッチ１３
を、低磁場用超電導コイル１２に電源１６と永久電流ス
イッチ１４を、それぞれ図のように接続した。高磁場用
超電導コイル１１はＮｂｚＳｎ線を用い、低磁場用超電
導コイル１２はＮｂ−Ｔｉ合金線を用いたものである。[Example 1] As shown in the cross section in Fig. 1, a hybrid coil 10
The superconducting coil 11 for high magnetic field is arranged on the inside and the superconducting coil 12 for low magnetic field is arranged coaxially on the outside. High magnetic field superconducting coil 11, power supply 15 and persistent current switch 13
A power source 16 and a persistent current switch 14 were connected to the low magnetic field superconducting coil 12 as shown in the figure. The superconducting coil 11 for high magnetic field uses NbzSn wire, and the superconducting coil 12 for low magnetic field uses Nb-Ti alloy wire.
各超電導コイルは個々に励磁され、永久電流スイッチに
より個別の永久電流閉ループを形成する。Each superconducting coil is individually energized and forms an individual persistent current closed loop with a persistent current switch.
すなわち高磁場用超電導コイル１１は永久電流スイッチ
１３と、低磁場用超電導コイル１２は永久電流スイッチ
１４と、それぞれ永久電流閉ループを形成する。That is, the superconducting coil 11 for high magnetic field and the persistent current switch 13 form a persistent current closed loop, and the superconducting coil 12 for low magnetic field forms a persistent current closed loop with the persistent current switch 14, respectively.
このハイブリッドコイルにより、コイル中心磁場強度１
４Ｔを安定に得ることができた。With this hybrid coil, the coil center magnetic field strength is 1
We were able to stably obtain 4T.
〔実施例２〕
第１図における高磁場用超電導コイル１１は平角断面の
Ｎｂ，Ｓｎ線を用い、低磁場用超電導コイルｌ２は円断
面のＮｂａＳｎ線を用いて、それぞれ構成した。実施例
１と同様第１図のように回路を構成し、１４Ｔ以上のコ
イル中心磁場強度を安定に得ることができた。[Example 2] The high magnetic field superconducting coil 11 in FIG. 1 was constructed using Nb and Sn wires with a rectangular cross section, and the low magnetic field superconducting coil 12 was constructed using an NbaSn wire with a circular cross section. As in Example 1, the circuit was configured as shown in FIG. 1, and a coil center magnetic field strength of 14 T or more could be stably obtained.
以上説明した第１および第２の実施例では、それぞれの
永久電流閉ループに独立した電源１５，ｌ６を設けたが
、単一の電源に永久電流スイッチ１３．１４および超電
導コイル１１．１２を接続することにより、一つの電源
を共通電源として利用することができる。In the first and second embodiments described above, independent power supplies 15 and 16 are provided for each persistent current closed loop, but the persistent current switch 13.14 and the superconducting coil 11.12 are connected to a single power supply. This allows one power source to be used as a common power source.
本発明のハイブリッド超電導コイルによると、接続部の
抵抗に起因する永久電流の減衰がなく、高い磁場安定度
が得られる。特にハイブリッドコイルの特長である高磁
場を安定に得ることができ、核磁気共鳴分析等に有用で
ある。接続部を超電導接続にするために全ての単位コイ
ルの線材を同じにしなくてもよいから、用途に応じて単
位コイルに価格の安い超電導線材を用いてハイブリッド
コイルを構成でき、ハイブリッドコイルのコストを安く
するこきができる。単位コイルに断面積の小さい線材（
例えばＮｂ−Ｔｉ合金線）を用いることが可能になる場
合、ハイブリッドコイルを小型化することもできる。According to the hybrid superconducting coil of the present invention, there is no attenuation of persistent current caused by the resistance of the connection portion, and high magnetic field stability can be obtained. In particular, it is possible to stably obtain a high magnetic field, which is a feature of hybrid coils, and is useful for nuclear magnetic resonance analysis. Since it is not necessary to use the same wire for all unit coils in order to make the connection part superconducting, a hybrid coil can be constructed using inexpensive superconducting wire for the unit coil depending on the application, reducing the cost of the hybrid coil. You can make it cheaper. A wire rod with a small cross-sectional area (
For example, if it becomes possible to use a Nb-Ti alloy wire, the hybrid coil can also be made smaller.
第１図は本発明のハイブリッド超電導コイルの一実施例
の断面図、第２図は従来のハイブリッド超電導コイルの
断面図である。
符号の説明
１−−−−−−−−−一高磁場用超電導コイル２−−一
−−・−−−−一低磁場用超電導コイル３−一一一一一
一一−一一接続部
４−−−−−−−一永久電流スイッチ
５−・−一一−一一一−一電源FIG. 1 is a sectional view of an embodiment of the hybrid superconducting coil of the present invention, and FIG. 2 is a sectional view of a conventional hybrid superconducting coil. Explanation of symbols 1 - - - - - Superconducting coil for high magnetic field 2 - - 1 - - - - - - Superconducting coil for low magnetic field 3 - 1 - 1 1 - 11 Connection section 4---------1 Permanent current switch 5--11-111-1 Power supply
Claims (3)
コイルにおいて、単位コイル毎に永久電流閉ループが形
成されていることを特徴とする、ハイブリッド超電導コ
イル。(1) A hybrid superconducting coil consisting of two or more unit coils, characterized in that a persistent current closed loop is formed for each unit coil.
Ｎｂ＿３ＳｎまたはＶ＿３Ｇａ等の化合物超電導線から
成る単位コイルと、低磁場側に位置するＮｂ−Ｔｉ等の
合金超電導線から成る単位コイルによって構成されるこ
とを特徴とする、請求項第１項のハイブリッド超電導コ
イル。(2) The two or more unit coils include a unit coil made of a compound superconducting wire such as Nb_3Sn or V_3Ga located on the high magnetic field side, and a unit coil made of an alloy superconducting wire such as Nb-Ti located on the low magnetic field side. A hybrid superconducting coil according to claim 1, characterized in that the hybrid superconducting coil comprises:
は合金超電導材料のいずれか一方から成り、高磁場側に
位置する単位コイルは低磁場側に位置する単位コイルに
比較して超電導体の量が多い線材によって構成されるこ
とを特徴とする、請求項第１項のハイブリッド超電導コ
イル。(3) The two or more unit coils are made of either a compound superconducting material or an alloy superconducting material, and the unit coil located on the high magnetic field side has a smaller amount of superconductor than the unit coil located on the lower magnetic field side. 2. The hybrid superconducting coil according to claim 1, wherein the hybrid superconducting coil is made of a large number of wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012125A JP2600413B2 (en) | 1990-01-22 | 1990-01-22 | Hybrid superconducting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012125A JP2600413B2 (en) | 1990-01-22 | 1990-01-22 | Hybrid superconducting coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03217009A true JPH03217009A (en) | 1991-09-24 |
| JP2600413B2 JP2600413B2 (en) | 1997-04-16 |
Family
ID=11796819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012125A Expired - Lifetime JP2600413B2 (en) | 1990-01-22 | 1990-01-22 | Hybrid superconducting coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2600413B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016535431A (en) * | 2013-10-04 | 2016-11-10 | ブルーカー バイオスピン ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＢｒｕｋｅｒ ＢｉｏＳｐｉｎ ＧｍｂＨ | Magnet coil system including HTSL tape conductor and LTS wire forming joint |
| CN114678184A (en) * | 2022-03-17 | 2022-06-28 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | A conduction cooling mixed Nb3Sn high-field superconducting magnet and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4454133B2 (en) * | 2000-10-02 | 2010-04-21 | ヤンマー株式会社 | Vegetable transplanter |
-
1990
- 1990-01-22 JP JP2012125A patent/JP2600413B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016535431A (en) * | 2013-10-04 | 2016-11-10 | ブルーカー バイオスピン ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＢｒｕｋｅｒ ＢｉｏＳｐｉｎ ＧｍｂＨ | Magnet coil system including HTSL tape conductor and LTS wire forming joint |
| US10241168B2 (en) | 2013-10-04 | 2019-03-26 | Bruker Biospin Gmbh | Magnet coil assembly, comprising an HTS strip conductor and an LTS wire, which form a joint |
| CN114678184A (en) * | 2022-03-17 | 2022-06-28 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | A conduction cooling mixed Nb3Sn high-field superconducting magnet and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2600413B2 (en) | 1997-04-16 |
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