JPH03278504A - Superconducting device - Google Patents
Superconducting deviceInfo
- Publication number
- JPH03278504A JPH03278504A JP7712190A JP7712190A JPH03278504A JP H03278504 A JPH03278504 A JP H03278504A JP 7712190 A JP7712190 A JP 7712190A JP 7712190 A JP7712190 A JP 7712190A JP H03278504 A JPH03278504 A JP H03278504A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- persistent current
- superconducting coil
- current switch
- high voltage
- 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 abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 9
- 230000005284 excitation Effects 0.000 claims description 5
- 239000002826 coolant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- AHLBNYSZXLDEJQ-FWEHEUNISA-N orlistat Chemical compound CCCCCCCCCCC[C@H](OC(=O)[C@H](CC(C)C)NC=O)C[C@@H]1OC(=O)[C@H]1CCCCCC AHLBNYSZXLDEJQ-FWEHEUNISA-N 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は核融合装置、加速器、一般産業機器、交通機器
等の超電導磁石として用いられる超電導装置に関する。Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a superconducting device used as a superconducting magnet in nuclear fusion devices, accelerators, general industrial equipment, transportation equipment, and the like.
（従来の技術）
従来、この種の超電導装置において、超電導コイルのク
エンチに対する保護回路としては第２図に示すような構
成のものが採用されている。即ち、第２図に示すように
直流励磁型ｊ！１の出力端に直流しゃ断器２を介して超
電導コイル３が接続され、またこの超電導コイル３と並
列に永久電流回路を構成する永久電流スイッチ５が接続
されている。これら超電導コイル３及び永久電流スイッ
チ５は液体ヘリウム等の冷却媒体により冷却される極低
温領域４内に設けられる。さらに、超電導コイル３に対
して並列に超電導コイル３のクエンチ時超電導コイル３
の蓄積エネルギを消費する保護抵抗６が接続され、この
保護抵抗６は常温領域に設けられる。(Prior Art) Conventionally, in this type of superconducting device, a structure as shown in FIG. 2 has been adopted as a protection circuit against quenching of the superconducting coil. That is, as shown in FIG. 2, the DC excitation type j! A superconducting coil 3 is connected to the output end of the superconducting coil 3 via a DC breaker 2, and a persistent current switch 5 constituting a persistent current circuit is connected in parallel with the superconducting coil 3. These superconducting coils 3 and persistent current switches 5 are provided in a cryogenic region 4 cooled by a cooling medium such as liquid helium. Furthermore, when the superconducting coil 3 is quenched, the superconducting coil 3 is connected in parallel to the superconducting coil 3.
A protective resistor 6 that consumes stored energy is connected, and this protective resistor 6 is provided in a normal temperature region.
ここで、上記永久電流スイッチ５は超電導コイル３の端
子３ａ、３ｂに接続される特殊な超電導線７と、この超
電導線７を加熱するヒータ８とから構成され、このヒー
タ８は外部のし−タ電源９に接続されている。Here, the persistent current switch 5 is composed of a special superconducting wire 7 connected to the terminals 3a and 3b of the superconducting coil 3, and a heater 8 that heats the superconducting wire 7. is connected to a power supply 9.
ところで、このような超電導装置において、超電導コイ
ル３が正常な状態にあるときは永久電流スイッチ５はオ
ン、つまり超電導線７が冷却媒体により冷却されて超電
導状態（抵抗値が零）になっており、超電導コイル３の
励磁若しくは消磁が行われる。また、超電導コイル３に
クエンチが発生すると、直流しゃ断器２を開にすると同
時にヒータ電源９によりヒータ８を加熱して超電導線７
を常電導化することで永久電流スイッチ５をオフにする
。すると、超電導コイル３に流れていた電流は保護抵抗
６に転流し、ジュール熱となって消費されるが、この時
超電導コイル３の両端子３ａ。By the way, in such a superconducting device, when the superconducting coil 3 is in a normal state, the persistent current switch 5 is on, which means that the superconducting wire 7 is cooled by the cooling medium and becomes a superconducting state (resistance value is zero). , the superconducting coil 3 is excited or demagnetized. Furthermore, when a quench occurs in the superconducting coil 3, the heater 8 is heated by the heater power source 9 at the same time as the DC breaker 2 is opened, and the superconducting wire 7 is heated.
By making the constant current conductive, the persistent current switch 5 is turned off. Then, the current flowing through the superconducting coil 3 is commutated to the protective resistor 6 and is consumed as Joule heat, but at this time both terminals 3a of the superconducting coil 3.
３ｂ間には （保護抵抗７の抵抗値） ×（超電導コイルに流れる電流） の高電圧が発生する。Between 3b (Resistance value of protective resistor 7) × (current flowing through superconducting coil) high voltage is generated.
（発明が解決しようとする課１ｉ）
このように従来の超電導装置においては、永久電流スイ
ッチ５がオン状態の永久電流モードで運転されていると
き、超電導コイル３にクエンチが発生するとこの超電導
コイル３の両端子間に高電圧が発生するため、この高電
圧により永久電流スイッチ５が破損してしまうことがあ
った。(Issue 1i to be Solved by the Invention) In this way, in the conventional superconducting device, when a quench occurs in the superconducting coil 3 when the persistent current switch 5 is operated in the persistent current mode in the on state, the superconducting coil 3 Since a high voltage is generated between both terminals of the switch, the persistent current switch 5 may be damaged due to this high voltage.
本発明は超電導コイルのクエンチ時に発生する高電圧か
ら永久電流スイッチを保護することができる超電導装置
を提供することを目的とする。An object of the present invention is to provide a superconducting device that can protect a persistent current switch from high voltage generated when a superconducting coil is quenched.
［発明の構成コ
（ａｌｌｉを解決するための手段）
本発明は上記の目的を達成するため、極低温領域に超電
導コイル及びこの超電導コイルと並列に永久電流回路を
構成する永久電流スイッチを接続し、前記超電導コイル
に並列接続される保護抵抗を極低温領域外に設けて励磁
電源により前記超電導コイルを励磁するようにした超電
導装置において、前記永久電流スイッチに直７列に着脱
可能に設けられ、前記超電導コイルのクエンチ時に発生
する高電圧により動作して前記永久電流スイッチを永久
電流回路から切離すしゃ断装置を具備する構成としたも
のである。[Structure of the Invention (Means for Solving Alli) In order to achieve the above object, the present invention connects a superconducting coil in a cryogenic region and a persistent current switch that constitutes a persistent current circuit in parallel with the superconducting coil. , in a superconducting device in which a protective resistor connected in parallel to the superconducting coil is provided outside the cryogenic region and the superconducting coil is excited by an excitation power source, the persistent current switch is detachably installed in seven rows in series, The present invention is configured to include a cutoff device that is operated by a high voltage generated when the superconducting coil is quenched to disconnect the persistent current switch from the persistent current circuit.
また、上記しゃ断装置として永久電流スイッチに直列に
接続される超電導線と、この超電導線に近接して設けら
れた金属端子とを備え、且つ超電導コイルのクエンチ時
に発生する高電圧を利用して前記超電導線と前記金属端
子間にアークを発生させて前記超電導線を溶断させるよ
うにしたものである。Further, the above-mentioned breaker includes a superconducting wire connected in series to the persistent current switch and a metal terminal provided close to the superconducting wire, and utilizes the high voltage generated when the superconducting coil is quenched to The superconducting wire is fused by generating an arc between the superconducting wire and the metal terminal.
（作用）
したがって、このような構成の超電導装置にあっては、
超電導コイルのクエンチ時にその両端子間に高電圧が発
生すると、しゃ断装置の動作により永久電流スイッチが
永久電流回路から切離されるので、この永久電流スイッ
チを高電圧から保護することが可能となる。(Function) Therefore, in a superconducting device with such a configuration,
When a high voltage is generated between both terminals of the superconducting coil when the superconducting coil is quenched, the persistent current switch is disconnected from the persistent current circuit by the operation of the breaker, making it possible to protect the persistent current switch from the high voltage.
（実施例） 以下本発明の一実施例を図面を参照して説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明による超電導装置の回路構成例を示すも
ので、第２図と同一部品には同一記号を付してその説明
を省略し、ここでは異なる点について述べる。本実施例
では第１図に示すように、超電導コイル３と並列に接続
された永久電流スイッチ５に対して直列に超電導コイル
３の端子３ａ。FIG. 1 shows an example of the circuit configuration of a superconducting device according to the present invention. The same parts as those in FIG. 2 are given the same symbols and their explanations are omitted, and only the different points will be described here. In this embodiment, as shown in FIG. 1, the terminal 3a of the superconducting coil 3 is connected in series with the persistent current switch 5 connected in parallel with the superconducting coil 3.
３ｂ間電圧が超電導コイル３のクエンチにより高電圧に
なると動作するしゃ断装置１０を設ける構成としたもの
である。このしゃ断装置１０は一端が超電導コイル３の
一方の端子３ａに接続され、他端が永久電流スイッチ５
の超電導線７の片端に接続された超電導線１１と、この
超電導線１１に近接して配設された金属端子１２とから
構成されこの金属端子１２は超電導コイル３の他方の端
子３ｂと共にアースライン１３に接続されている。3b becomes a high voltage due to quenching of the superconducting coil 3, a breaker device 10 is provided which operates. This breaker device 10 has one end connected to one terminal 3a of the superconducting coil 3, and the other end connected to the persistent current switch 5.
It is composed of a superconducting wire 11 connected to one end of the superconducting wire 7, and a metal terminal 12 disposed close to the superconducting wire 11. 13.
この場合、しゃ断装置１０は極低温領域４内において容
易に取付け、取外し可能な箇所に設置される。In this case, the breaker device 10 is installed in the cryogenic region 4 at a location where it can be easily attached and removed.
このように構成された超電導装置において、いま超電導
コイル３が正常な状態にあるときは永久電流スイッチ５
の超電導線７及びしゃ断装置１０の超電導線１１の何れ
もが冷却媒体により冷却されて超電導状態、つまりオン
状態にあり、この状態で超電導コイル３の励磁若しくは
情動が行われる。In the superconducting device configured as described above, when the superconducting coil 3 is in a normal state, the persistent current switch 5
Both the superconducting wire 7 and the superconducting wire 11 of the breaker 10 are cooled by the cooling medium and are in a superconducting state, that is, in an on state, and in this state, the superconducting coil 3 is excited or energized.
このような状態で運転されているとき、超電導コイル３
にクエンチが発生すると、直流しゃ断器２を開放すると
同時に永久電流スイッチ５のヒータ８を加熱して超電導
線７を常電導化し、オフにする。すると、超電導コイル
３に流れていた電流は保護抵抗６に転流するが、このと
き超電導コイル３の両端子３ａ、３ｂ間には高電圧が発
生し、この電圧はしゃ断装置１０の超電導線１１と金属
端子１２間に印加される。この場合、しゃ断装置１０の
金属端子１２は超電導線１１に近接して配設されている
ため、超電導コイル３のクエンチと同時に発生する前述
の高電圧により超電導線１１と金属端子１２との間にア
ークが発生する。したがって、このアークの発生により
超電導線１１と金属端子１２は溶融し続け、最終的に超
電導線１１が溶断するため、永久電流スイッチ５が永久
電流回路から切離される。これにより、永久電流スイッ
チ５を超電導コイル３のクエンチ時に発生する高電圧か
ら保護することができる。When operating under such conditions, the superconducting coil 3
When a quench occurs, the DC breaker 2 is opened and at the same time the heater 8 of the persistent current switch 5 is heated to make the superconducting wire 7 normal conductive and turned off. Then, the current flowing in the superconducting coil 3 is commutated to the protective resistor 6, but at this time, a high voltage is generated between both terminals 3a and 3b of the superconducting coil 3, and this voltage is applied to the superconducting wire 11 of the breaker 10. and the metal terminal 12. In this case, since the metal terminal 12 of the breaker 10 is disposed close to the superconducting wire 11, the high voltage generated simultaneously with the quenching of the superconducting coil 3 causes a gap between the superconducting wire 11 and the metal terminal 12. An arc occurs. Therefore, the superconducting wire 11 and the metal terminal 12 continue to melt due to the generation of this arc, and the superconducting wire 11 is finally fused, so that the persistent current switch 5 is disconnected from the persistent current circuit. Thereby, the persistent current switch 5 can be protected from the high voltage generated when the superconducting coil 3 is quenched.
このように本実施例では超電導コイル３と並列に接続さ
れる永久電流スイッチ５に対して直列にしゃ断装置１０
を設け、超電導コイル３の端子３ａ、３ｂ間電圧が超電
導コイル３のクエンチにより高電圧になると超電導線１
１と金属端子１２との間に発生するアークにより超電導
線１１を溶断して永久電流スイッチ５を永久電流回路か
ら切離するようにしたので、永久電流スイッチ５が高電
圧の印加により破損するようなことがなくなる。In this embodiment, the breaker 10 is connected in series with the persistent current switch 5 connected in parallel with the superconducting coil 3.
When the voltage between the terminals 3a and 3b of the superconducting coil 3 becomes high due to the quenching of the superconducting coil 3, the superconducting wire 1
1 and the metal terminal 12 fuses the superconducting wire 11 and disconnects the persistent current switch 5 from the persistent current circuit, thereby preventing the persistent current switch 5 from being damaged by the application of high voltage. Things will disappear.
また、前述したしゃ断装置１０は通常のしゃ断器とは異
なり、オン状態のときには超電導線１１の抵抗値が零な
ので、超電導コイル３を永久電流モードで運転しても何
ら問題がない。Further, unlike a normal breaker, the above-mentioned breaker 10 has a resistance value of zero in the superconducting wire 11 when it is in the on state, so there is no problem even if the superconducting coil 3 is operated in persistent current mode.
さらに、しゃ断装置は極低温領域内の取付け、取外しの
容易な箇所に設置されているので、超電導コイル３にク
エンチが発生する毎にしゃ断装置１０が使用できなくな
っても、しゃ断装置１０の取換えを簡単、且つ短時間で
行なうことができる。Furthermore, since the breaker is installed at a location within the cryogenic region where it can be easily installed and removed, even if the breaker 10 becomes unusable each time a quench occurs in the superconducting coil 3, the breaker 10 can be replaced. can be done easily and in a short time.
なお、上記実施例ではしゃ断装置１０の金属端子１２を
アースライン１２に接続するようにしたが、必ずしもそ
の必要はない。In the above embodiment, the metal terminal 12 of the breaker 10 is connected to the ground line 12, but this is not necessarily necessary.
［発明の効果コ
以上述べたように本発明によれば、超電導コイルのクエ
ンチ時にその両端子間に発生する高電圧によりしゃ断装
置を動作させて永久電流スイッチを永久電流回路から切
離するようにしたので、永久電流スイッチを高電圧がら
保護することができる超電導装置を提供できる。[Effects of the Invention] As described above, according to the present invention, when the superconducting coil is quenched, the high voltage generated between both terminals of the superconducting coil operates the breaker to disconnect the persistent current switch from the persistent current circuit. Therefore, it is possible to provide a superconducting device that can protect persistent current switches from high voltages.
第１図は本発明による超電導装置の一実施例を示す回路
構成図、第２図は従来の超電導装置を示す回路構成図で
ある。
ｌ・−・直流励磁電源、２・・・直流しゃ断器、３・・
・超電導コイル、４・・・極低温領域、５・・・永久電
流スイッチ、６・・・保護抵抗、７・・・超電導線、８
・・・ヒータ、９・・・ヒータ電源、１０・・・しゃ断
装置、１１・・・超電導線、１２・・・金属端子、１３
・・・アースライン。FIG. 1 is a circuit diagram showing an embodiment of a superconducting device according to the present invention, and FIG. 2 is a circuit diagram showing a conventional superconducting device. l...DC excitation power supply, 2...DC breaker, 3...
・Superconducting coil, 4... Cryogenic region, 5... Persistent current switch, 6... Protective resistor, 7... Superconducting wire, 8
... Heater, 9 ... Heater power supply, 10 ... Breaking device, 11 ... Superconducting wire, 12 ... Metal terminal, 13
...Earth line.
Claims (2)
と並列に永久電流回路を構成する永久電流スイッチを接
続し、前記超電導コイルに並列接続される保護抵抗を極
低温領域外に設けて励磁電源により前記超電導コイルを
励磁するようにした超電導装置において、前記永久電流
スイッチに直列に着脱可能に設けられ、前記超電導コイ
ルのクエンチ時に発生する高電圧により動作して前記永
久電流スイッチを永久電流回路から切離すしゃ断装置を
具備したことを特徴とする超電導装置。(1) A superconducting coil and a persistent current switch constituting a persistent current circuit are connected in parallel with the superconducting coil in a cryogenic region, and a protective resistor connected in parallel to the superconducting coil is provided outside the cryogenic region and an excitation power supply is provided. In the superconducting device configured to excite the superconducting coil, the persistent current switch is detachably installed in series with the persistent current switch, and is operated by a high voltage generated when the superconducting coil is quenched to disconnect the persistent current switch from the persistent current circuit. A superconducting device characterized by being equipped with a separating device.
と並列に永久電流回路を構成する永久電流スイッチを接
続し、前記超電導コイルに並列接続される保護抵抗を極
低温領域外に設けて励磁電源により前記超電導コイルを
励磁するようにした超電導装置において、前記永久電流
スイッチに直列に接続される超電導線と、この超電導線
に近接して設けられた金属端子とを備え、且つ前記超電
導コイルのクエンチ時に発生する高電圧を利用して前記
超電導線と前記金属端子間にアークを発生させて前記超
電導線を溶断させるようにしたしゃ断装置を設けたこと
を特徴とする超電導装置。(2) A superconducting coil and a persistent current switch that constitutes a persistent current circuit are connected in parallel with the superconducting coil in a cryogenic region, and a protective resistor connected in parallel to the superconducting coil is provided outside the cryogenic region and an excitation power supply is provided. A superconducting device configured to excite the superconducting coil, comprising a superconducting wire connected in series to the persistent current switch, and a metal terminal provided close to the superconducting wire, and when quenching the superconducting coil. A superconducting device characterized in that a breaker is provided that uses a generated high voltage to generate an arc between the superconducting wire and the metal terminal to fuse the superconducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7712190A JP2768796B2 (en) | 1990-03-28 | 1990-03-28 | Superconducting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7712190A JP2768796B2 (en) | 1990-03-28 | 1990-03-28 | Superconducting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03278504A true JPH03278504A (en) | 1991-12-10 |
| JP2768796B2 JP2768796B2 (en) | 1998-06-25 |
Family
ID=13624965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7712190A Expired - Lifetime JP2768796B2 (en) | 1990-03-28 | 1990-03-28 | Superconducting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2768796B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8989828B2 (en) | 2012-06-04 | 2015-03-24 | Hitachi, Ltd. | Superconducting magnet apparatus |
| WO2018066326A1 (en) * | 2016-10-06 | 2018-04-12 | 株式会社日立製作所 | Superconducting electromagnet device |
-
1990
- 1990-03-28 JP JP7712190A patent/JP2768796B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8989828B2 (en) | 2012-06-04 | 2015-03-24 | Hitachi, Ltd. | Superconducting magnet apparatus |
| WO2018066326A1 (en) * | 2016-10-06 | 2018-04-12 | 株式会社日立製作所 | Superconducting electromagnet device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2768796B2 (en) | 1998-06-25 |
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