JPH10270765A - Superconducting switch - Google Patents
Superconducting switchInfo
- Publication number
- JPH10270765A JPH10270765A JP9074881A JP7488197A JPH10270765A JP H10270765 A JPH10270765 A JP H10270765A JP 9074881 A JP9074881 A JP 9074881A JP 7488197 A JP7488197 A JP 7488197A JP H10270765 A JPH10270765 A JP H10270765A
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- Prior art keywords
- superconducting
- wire coil
- superconducting wire
- heater
- state
- Prior art date
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Abstract
(57)【要約】
【課題】 ＯＦＦ状態からＯＮ状態への転移のみなら
ず、ＯＮ状態からＯＦＦ状態への転移も高速な超電導ス
イッチを提供する
【解決手段】 超電導線材コイルを冷却して常電導状態
から超電導状態に転移させることをＯＮ動作、ヒーター
で超電導線材コイルを加熱して超電導状態から常電導状
態に転移させることをＯＦＦ動作とする超電導スイッチ
において、超電導線材コイルの外面の一つにヒーターが
配置されており、ヒーターが超電導線材コイルに接触し
ている部分の面積が、ヒーターが配置されている超電導
線材コイルの外面よりも小さいことを特徴とする超電導
スイッチ。
PROBLEM TO BE SOLVED: To provide a superconducting switch in which not only transition from the OFF state to the ON state but also transition from the ON state to the OFF state is performed at high speed. In a superconducting switch in which a transition from a superconducting state to a superconducting state is performed by an ON operation, and a transition from a superconducting state to a normal state by heating a superconducting wire coil is performed by a heater, a heater is provided on one of the outer surfaces of the superconducting wire coil. Wherein the area of the portion where the heater is in contact with the superconducting wire coil is smaller than the outer surface of the superconducting wire coil where the heater is arranged.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は超電導スイッチに関
し、特に浮上式鉄道や、超電導電磁推進船において用い
るのに好適な超電導スイッチに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting switch, and more particularly to a superconducting switch suitable for use in a levitation railway or a superconducting magnetically propelled ship.
【０００２】[0002]
【従来の技術】超電導スイッチは、例えば、所定の磁場
まで励磁した超電導コイルマグネットの両端を短絡し、
電源が無くとも超電導コイルマグネットに永久電流が還
流する回路を形成するのに用いられる。図１に従来より
用いられている超電導スイッチの断面図を示す。この超
電導スイッチは、ＳＵＳ製の巻枠１に例えばＮｂ3 Ｓｎ
のような超電導線材を無誘導に巻いて超電導線材コイル
３を構成し、その外周にヒーター５を配置し、ヒーター
５及び超電導線材コイル３をＧ−ＦＲＰのような断熱材
で形成された断熱層４で覆った構造となっている。そし
てこの超電導スイッチは、超電導線材コイル３を構成す
る超電導線材の臨界温度を越える加熱あるいは冷却によ
って、超電導線材コイル３を常電導状態（ＯＦＦ状態）
あるいは超電導状態（ＯＮ状態）に制御するものであ
る。2. Description of the Related Art A superconducting switch, for example, short-circuits both ends of a superconducting coil magnet excited to a predetermined magnetic field,
It is used to form a circuit in which a permanent current returns to the superconducting coil magnet without a power supply. FIG. 1 is a sectional view of a conventional superconducting switch. This superconducting switch is made of, for example, Nb 3 Sn
A superconducting wire coil 3 is formed by winding a superconducting wire such as that described above without induction, a heater 5 is arranged on the outer periphery thereof, and the heater 5 and the superconducting wire coil 3 are formed of a heat insulating layer formed of a heat insulating material such as G-FRP. 4 covered structure. The superconducting switch turns the superconducting wire coil 3 into a normal conducting state (OFF state) by heating or cooling exceeding the critical temperature of the superconducting wire constituting the superconducting wire coil 3.
Alternatively, it is controlled to a superconducting state (ON state).
【０００３】図２に、この超電導スイッチを用いて超電
導コイルに永久電流を還流する際の回路図の一例を示
す。図２において、１１は超電導コイルマグネット、１
３は外部電源、９は図１に示した超電導スイッチであ
る。そして図２の回路において、電源１３によって超電
導コイルマグネット１１に通電した後、超電導スイッチ
９を冷却して超電導状態（ＯＮ状態）にし、超電導コイ
ルマグネット１１の両端を短絡すれば、電源１３を切り
離しても超電導コイルマグネット１１には超電導スイッ
チ９を経由する永久電流が還流する。FIG. 2 shows an example of a circuit diagram when a permanent current is returned to a superconducting coil using the superconducting switch. In FIG. 2, reference numeral 11 denotes a superconducting coil magnet, 1
Reference numeral 3 denotes an external power supply, and 9 denotes a superconducting switch shown in FIG. In the circuit of FIG. 2, after the superconducting coil magnet 11 is energized by the power supply 13, the superconducting switch 9 is cooled to a superconducting state (ON state), and if the both ends of the superconducting coil magnet 11 are short-circuited, the power supply 13 is disconnected. Also, the permanent current flowing through the superconducting switch 9 flows back to the superconducting coil magnet 11.
【０００４】このような超電導スイッチには、ＯＦＦ状
態からＯＮ状態への切り替え動作（ＯＮ動作）、ＯＮ状
態からＯＦＦ状態への切り替え動作（ＯＦＦ動作）の高
速化が要求される。[0004] Such a superconducting switch is required to speed up the operation of switching from the OFF state to the ON state (ON operation) and the operation of switching from the ON state to the OFF state (OFF operation).
【０００５】特開昭６１−２８９６８０号公報には、巻
線中心に熱伝導性の良い銅の平編線を導入し、その一部
が超電導線材コイルを取り囲む銅ケースにはんだ付けで
熱的接触した構造の超電導スイッチが記載されている。
この超電導スイッチでは、銅の平編線と銅ケースとによ
って超電導線材コイルの均熱化を図ることで、超電導線
材コイルを効率よく冷却し、ＯＮ動作を迅速化するもの
である。In Japanese Patent Application Laid-Open No. 61-289680, a flat braided copper wire having good heat conductivity is introduced at the center of a winding, and a part of the flat braided wire is thermally connected to a copper case surrounding a superconducting wire coil by soldering. A superconducting switch having the above structure is described.
In this superconducting switch, the superconducting wire coil is uniformly heated by the copper flat braided wire and the copper case, so that the superconducting wire coil is efficiently cooled and the ON operation is speeded up.
【０００６】しかし、この特開昭６１−２８９６８０号
公報に記載の超電導スイッチでは、ＯＮ動作は迅速化さ
れるが、逆にＯＦＦ動作の際には超電導線材コイル全体
を均一に加熱することになるため昇温に時間がかかり、
ＯＦＦ動作は容易ではない。However, in the superconducting switch described in Japanese Patent Application Laid-Open No. 61-289680, the ON operation is speeded up. On the contrary, in the OFF operation, the entire superconducting wire coil is uniformly heated. Therefore, it takes time to raise the temperature,
OFF operation is not easy.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、超電導線材
コイルを局部的に温度上昇させることによりＯＦＦ動作
の高速な超電導スイッチを提供することを目的とする。
さらに本発明は、前述のＯＦＦ動作のみならず、冷却効
率が高くＯＮ動作も高速な超電導スイッチを提供するこ
とを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a high-speed superconducting switch which is turned off by locally increasing the temperature of a superconducting wire coil.
Still another object of the present invention is to provide a superconducting switch that has a high cooling efficiency and a high ON operation as well as the above-described OFF operation.
【０００８】[0008]
【課題を解決する手段】本発明は、以下の通りである。The present invention is as follows.
【０００９】（１）超電導線材コイルを冷却して常電導
状態から超電導状態に転移させることをＯＮ動作、ヒー
ターで超電導線材コイルを加熱して超電導状態から常電
導状態に転移させることをＯＦＦ動作とする超電導スイ
ッチにおいて、超電導線材コイルの外面の一部に、超電
導線材コイルを局部的に加熱できるヒーターを配置した
ことを特徴とする超電導スイッチ。(1) The operation of cooling the superconducting wire coil to transition from the normal conducting state to the superconducting state is called an ON operation, and the operation of heating the superconducting wire coil by a heater to transition from the superconducting state to the normal conducting state is called an OFF operation. 1. A superconducting switch comprising: a superconducting switch, wherein a heater capable of locally heating the superconducting wire coil is arranged on a part of the outer surface of the superconducting wire coil.
【００１０】（２）超電導線材コイルを冷却して常電導
状態から超電導状態に転移させることをＯＮ動作、ヒー
ターで超電導線材コイルを加熱して超電導状態から常電
導状態に転移させることをＯＦＦ動作とする超電導スイ
ッチにおいて、超電導線材コイルの外面の一部に、超電
導線材コイルを局部的に加熱できるヒーターを配置し、
超電導線材コイルのヒーターが配置されていない外面を
均熱部材で囲んだことを特徴とする超電導スイッチ。(2) The ON operation is to cool the superconducting wire coil to make a transition from the normal conducting state to the superconducting state, and the OFF operation is to heat the superconducting wire coil by the heater to make the transition from the superconducting state to the normal conducting state. In the superconducting switch, a heater capable of locally heating the superconducting wire coil is arranged on a part of the outer surface of the superconducting wire coil,
A superconducting switch characterized in that the outer surface of the superconducting wire coil where no heater is arranged is surrounded by a heat equalizing member.
【００１１】（３）超電導線材コイルにヒーターが接触
している部分の面積が、超電導線材コイルのヒーターが
配置された外面の面積の１０〜３０％であることを特徴
とする（１）又は（２）記載の超電導スイッチ。(3) The area of the portion where the heater is in contact with the superconducting wire coil is 10 to 30% of the area of the outer surface on which the heater of the superconducting wire coil is arranged (1) or (1). 2) The superconducting switch according to the above.
【００１２】（４）ＯＦＦ動作の際に、超電導線材コイ
ルの一部のみをヒーターの加熱によって常電導状態と
し、その後は常電導状態となった部分から発生するジュ
ール熱によって超電導線材コイルを加熱することを特徴
とする（１）、（２）又は（３）記載の超電導スイッ
チ。(4) At the time of the OFF operation, only a part of the superconducting wire coil is brought into a normal conducting state by heating the heater, and thereafter, the superconducting wire coil is heated by Joule heat generated from the part where the normal conducting state is obtained. The superconducting switch according to (1), (2) or (3), wherein
【００１３】[0013]
【発明の実施の形態】以下、本発明について詳細に説明
する。超電導線材コイルの材質としては、例えばＮｂ3
Ｓｎ線材、ＮｂＴｉ、Ｎｂ3Ａｌ等が適している。Ｎｂ
3 Ｓｎの臨界温度は約１８Ｋ、ＮｂＴｉの臨界温度は約
９Ｋ、Ｎｂ3 Ａｌの臨界温度は約１５Ｋであり、液体ヘ
リウム温度で超電導状態となる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The material of the superconducting wire coil is, for example, Nb 3
Sn wire, NbTi, Nb 3 Al and the like are suitable. Nb
3 critical temperature of Sn is about 18K, the critical temperature of the NbTi critical temperature of about 9K, Nb 3 Al is about 15K, the superconducting state at the liquid helium temperature.
【００１４】このような超電導線材を巻軸に無誘導に巻
いて、超電導線材コイルとする。巻軸の材質がステンレ
ス等の場合には絶縁処理を行うが、材質がＧ−ＦＲＰ等
のような絶縁体の場合にはそのまま用いてもよい。Such a superconducting wire is wound around a winding shaft without induction to form a superconducting wire coil. Insulation treatment is performed when the material of the winding shaft is stainless steel or the like, but may be used as it is when the material is an insulator such as G-FRP.
【００１５】超電導スイッチでは、ＯＦＦ状態での抵抗
値を大きくすることが望ましい。このため、コイルを形
成する超電導線材の長さは、超電導スイッチに要求され
るＯＦＦ状態での抵抗値に応じて長くする必要がある。
例えば、径０．８７mmのＮｂ3 Ｓｎ線材を用いた超電導
スイッチのＯＦＦ状態での抵抗値を２０Ω以上にするた
めには、Ｎｂ3 Ｓｎ線材を２２０ｍ以上用いて超電導線
材コイルを構成するとよい。但し、超電導線材を過度に
長くすると超電導スイッチのコンパクト化が図れなくな
るため、好ましくない。In the superconducting switch, it is desirable to increase the resistance value in the OFF state. For this reason, the length of the superconducting wire forming the coil needs to be increased according to the resistance in the OFF state required for the superconducting switch.
For example, in order to make the resistance value of the superconducting switch using an Nb 3 Sn wire having a diameter of 0.87 mm in an OFF state of 20 Ω or more, it is preferable to configure a superconducting wire coil using an Nb 3 Sn wire of 220 m or more. However, an excessively long superconducting wire is not preferable because the superconducting switch cannot be made compact.
【００１６】また、超電導線材コイルは細長い円筒形状
とし、超電導線材の層数が少なくなるようにする。超電
導線材コイルに生じる巻乱れをできるだけ少なくし、超
電導線材の微小滑りを防止するためである。The superconducting wire coil is formed in an elongated cylindrical shape so that the number of layers of the superconducting wire is reduced. This is because the turbulence generated in the superconducting wire coil is reduced as much as possible, and the superconducting wire is prevented from micro-slip.
【００１７】このような超電導線材コイルにヒーターを
配置した超電導スイッチでは、従来は図１に示すように
超電導線材コイルの外周面全体にヒーターを配置してお
り、ヒーターが外周面全体を加熱してＯＦＦ動作させる
ように構成されていた。これに対して本発明は、まずヒ
ーターで超電導線材コイルを局部的に昇温して常電導状
態とし、ついで常電導状態になった部分に発生するジュ
ール熱によって超電導線材コイルの他の部分の温度を上
昇させるという従来とは異なるプロセスによって、より
高速にＯＦＦ動作を行う超電導スイッチである。In such a superconducting switch in which a heater is disposed on a superconducting wire coil, a heater is conventionally disposed on the entire outer peripheral surface of the superconducting wire coil as shown in FIG. 1, and the heater heats the entire outer peripheral surface. It was configured to perform an OFF operation. On the other hand, according to the present invention, first, the superconducting wire coil is locally heated by a heater to a normal conducting state, and then the temperature of the other portion of the superconducting wire coil is increased by Joule heat generated in the normal conducting state. This is a superconducting switch that performs an OFF operation at a higher speed by a process different from the conventional process of raising the temperature.
【００１８】このため本発明では、超電導線材コイルの
外面の一部に、超電導線材コイルを局部的に加熱できる
ヒーターを配置している。ここで超電導線材コイルの外
面の一つとは、外周面、内周面、上面、下面のうちのい
ずれか一面をいうものとする。また、超電導線材コイル
を局部的に加熱するには、例えば小型のヒーターを用い
て外面の一部のみを加熱するようにすればよい。For this reason, in the present invention, a heater capable of locally heating the superconducting wire coil is disposed on a part of the outer surface of the superconducting wire coil. Here, one of the outer surfaces of the superconducting wire coil refers to any one of the outer peripheral surface, the inner peripheral surface, the upper surface, and the lower surface. To locally heat the superconducting wire coil, for example, a small heater may be used to heat only a part of the outer surface.
【００１９】表１に、内径６４mm，外形８４mm，高さ１
１２mmに形成した０．８７mm径Ｎｂ3 Ｓｎ線材コイルの
外周面中央部に幅２０〜１１２mmの円筒状ヒーターコイ
ルを接触させた構造の超電導スイッチを構成し、ヒータ
ー熱量１０ＷでＯＦＦ動作させた場合の５％ＯＦＦ時間
と１０％ＯＦＦ時間とのシミュレーション結果を示す。
なお、５％ＯＦＦ時間とは超電導線材コイルの５％が常
電導状態に転移して電気抵抗を発生するのに要する時間
のことをいい、１０％ＯＦＦ時間とは超電導線材コイル
の１０％が同じく常電導状態に転移するのに要する時間
のことをいう。Table 1 shows that the inner diameter is 64 mm, the outer diameter is 84 mm, and the height is 1.
Constitute superconducting switch structure contacting the cylindrical heater coil width 20~112mm the outer peripheral surface central portion of 0.87mm diameter Nb 3 Sn wire coil formed in 12 mm, in the case where is OFF operation by a heater heat 10W The simulation result of 5% OFF time and 10% OFF time is shown.
The 5% OFF time refers to the time required for 5% of the superconducting wire coil to transition to the normal conducting state and generate electric resistance, and the 10% OFF time refers to the same time when 10% of the superconducting wire coil is used. It means the time required for transition to the normal conducting state.
【００２０】[0020]
【表１】 [Table 1]
【００２１】表１に示されるように、超電導線材コイル
の外面の一つにヒーターを配置し、ヒーターが超電導線
材コイルに接触している部分の面積が、ヒーターが配置
されている超電導線材コイルの外面よりも小さくなるよ
うにすることで、５％ＯＦＦ時間、１０％ＯＦＦ時間の
いずれもが短縮できる。特に、ヒーターが超電導線材コ
イルに接触している部分の面積が、ヒーターを配置した
超電導線材コイルの外面面積の１０〜３０％であるとよ
い。As shown in Table 1, a heater is arranged on one of the outer surfaces of the superconducting wire coil, and the area of the portion where the heater is in contact with the superconducting wire coil is smaller than that of the superconducting wire coil on which the heater is arranged. By making it smaller than the outer surface, both the 5% OFF time and the 10% OFF time can be shortened. In particular, the area of the portion where the heater is in contact with the superconducting wire coil is preferably 10 to 30% of the outer surface area of the superconducting wire coil where the heater is arranged.
【００２２】このように、ヒーターを本発明のごとく局
所的に配置することで、外周面全体にヒーターを配置し
た場合よりも、速やかに超電導線材の一部を常電導状態
にすることができる。そして、常電導状態となった部分
に流れる電流によって、その部分にジュール熱が発生す
る。浮上式鉄道用超電導磁石用の超電導スイッチにおい
て用いられるヒーターは、コンパクト化、冷却機構への
負担の軽減等のため、１〜２０Ｗ程度のものを用いるの
が一般的である。これに対して、前記常電導部分に発生
するジュール熱は例えば１０％ＯＦＦの状態で１００Ｗ
程度と高い。したがって、このジュール熱を利用すれ
ば、ヒーターからの加熱のみを利用する場合よりも、迅
速にＯＦＦ動作を行うことができる。Thus, by locally disposing the heater as in the present invention, a part of the superconducting wire can be brought into the normal conduction state more quickly than when the heater is disposed on the entire outer peripheral surface. Then, Joule heat is generated in the portion by the current flowing in the portion in the normal conducting state. In general, a heater used in a superconducting switch for a levitation type superconducting magnet for a superconducting magnet uses a heater of about 1 to 20 W in order to make the heater compact and reduce the load on a cooling mechanism. On the other hand, the Joule heat generated in the normal conducting portion is, for example, 100 W in a state of 10% OFF.
Degree and high. Therefore, by using this Joule heat, the OFF operation can be performed more quickly than when only heating from the heater is used.
【００２３】ヒーターの材質としては、ニクロム線、コ
ンスタンタン線、マンガニン線等の抵抗発熱体を用い
る。これらの材質を用いたヒーターは外部電源より電流
を供給することで容易に発熱し、また発熱量の制御も容
易だからである。また、ヒーターは超電導線材コイルに
接触するように配置するが、両者の間には絶縁材料が介
在していてもよい。As a material of the heater, a resistance heating element such as a nichrome wire, a constantan wire, a manganin wire or the like is used. This is because a heater using these materials easily generates heat by supplying a current from an external power supply, and the amount of generated heat is easily controlled. Further, the heater is disposed so as to be in contact with the superconducting wire coil, but an insulating material may be interposed between the two.
【００２４】さらに、超電導線材コイルのヒーターを配
置していない面を均熱部材で囲んだ構造としてもよい。
具体的には、例えば超電導線材コイルの外周面にヒータ
ーが配置されている場合には、超電導線材コイルの内周
面，上面，下面を囲むように均熱部材を配置する。この
ような構成とすることで、超電導線材コイルの冷却効率
を向上させ、超電導スイッチのＯＮ動作を迅速化するこ
とが可能である。均熱部材としては、例えば薄銅板等の
ような良熱伝導体があげられる。Further, the surface of the superconducting wire coil where no heater is arranged may be surrounded by a heat equalizing member.
Specifically, for example, when a heater is disposed on the outer peripheral surface of the superconducting wire coil, the heat equalizing member is disposed so as to surround the inner peripheral surface, the upper surface, and the lower surface of the superconducting wire coil. With such a configuration, it is possible to improve the cooling efficiency of the superconducting wire coil and to speed up the ON operation of the superconducting switch. Examples of the heat equalizing member include a good heat conductor such as a thin copper plate.
【００２５】均熱部材を配置する場合には、ヒーターの
熱が均熱部材に伝導しにくいようにする必要がある。ヒ
ーターの熱が均熱部材に容易に伝導してしまうと、超電
導線材コイルの一部を速やかに常電導状態に転移させる
ことができないからである。この観点から、超電導線材
コイルのヒーターを配置した面には、均熱部材を配置し
ない。また、ヒーターと均熱部材はできるだけ離れてい
ることが好ましい。When the heat equalizing member is provided, it is necessary to make it difficult for the heat of the heater to be conducted to the heat equalizing member. If the heat of the heater is easily conducted to the heat equalizing member, a part of the superconducting wire coil cannot be quickly transferred to the normal conducting state. From this viewpoint, no heat equalizing member is disposed on the surface of the superconducting wire coil on which the heater is disposed. Further, it is preferable that the heater and the heat equalizing member are separated as much as possible.
【００２６】[0026]
【発明の効果】以上のように、本発明によればＯＮ動
作、ＯＦＦ動作ともに高速な超電導スイッチを得ること
ができる。その結果、超電導コイルマグネットの励消磁
の時間を短縮し、作業性が向上する。また、励消磁時の
液体ヘリウムの消費量を低減できるためコスト的にも有
利である。As described above, according to the present invention, a high-speed superconducting switch can be obtained for both ON operation and OFF operation. As a result, the time for excitation and demagnetization of the superconducting coil magnet is reduced, and workability is improved. Further, since the consumption of liquid helium at the time of excitation / demagnetization can be reduced, it is advantageous in terms of cost.
【図１】従来の超電導スイッチの断面図である。FIG. 1 is a sectional view of a conventional superconducting switch.
【図２】超電導スイッチと超電導コイルマグネットとの
接続を示す概略図である。FIG. 2 is a schematic diagram showing connection between a superconducting switch and a superconducting coil magnet.
【図３】本発明の一実施例である超電導スイッチの断面
図である。FIG. 3 is a sectional view of a superconducting switch according to an embodiment of the present invention.
１ 巻枠 ３ 超電導線材コイル ４ 断熱層 ５ ヒーター ７ 均熱部材 ９ 超電導スイッチ １１ 超電導コイルマグネット １３ 外部電源 DESCRIPTION OF SYMBOLS 1 Reel 3 Superconducting wire coil 4 Heat insulation layer 5 Heater 7 Heat equalizing member 9 Superconducting switch 11 Superconducting coil magnet 13 External power supply
フロントページの続き (72)発明者 菅原 一美 東京都港区虎ノ門一丁目15番16号船舶振興 ビル財団法人シップ・アンド・オーシャン 財団内Continued on the front page (72) Inventor Kazumi Sugawara 1-15-16 Toranomon, Minato-ku, Tokyo Ship promotion Building in Ship and Ocean Foundation
Claims (4)
から超電導状態に転移させることをＯＮ動作、ヒーター
で超電導線材コイルを加熱して超電導状態から常電導状
態に転移させることをＯＦＦ動作とする超電導スイッチ
において、超電導線材コイルの外面の一部に、超電導線
材コイルを局部的に加熱できるヒーターを配置したこと
を特徴とする超電導スイッチ。1. An operation of cooling the superconducting wire coil to transition from the normal conducting state to the superconducting state is an ON operation, and a heating of the superconducting wire coil by the heater to transition from the superconducting state to the normal conducting state is an OFF operation. A superconducting switch, characterized in that a heater capable of locally heating the superconducting wire coil is arranged on a part of the outer surface of the superconducting wire coil.
から超電導状態に転移させることをＯＮ動作、ヒーター
で超電導線材コイルを加熱して超電導状態から常電導状
態に転移させることをＯＦＦ動作とする超電導スイッチ
において、超電導線材コイルの外面の一部に、超電導線
材コイルを局部的に加熱できるヒーターを配置し、超電
導線材コイルのヒーターが配置されていない外面を均熱
部材で囲んだことを特徴とする超電導スイッチ。2. An operation of cooling the superconducting wire coil to transition from the normal conducting state to the superconducting state is an ON operation, and a heating of the superconducting wire coil by the heater to transition from the superconducting state to the normal conducting state is an OFF operation. In the superconducting switch, a heater capable of locally heating the superconducting wire coil is arranged on a part of the outer surface of the superconducting wire coil, and the outer surface where the heater of the superconducting wire coil is not arranged is surrounded by a soaking member. Superconducting switch.
いる部分の面積が、超電導線材コイルのヒーターが配置
された外面の面積の１０〜３０％であることを特徴とす
る請求項１又は２記載の超電導スイッチ。3. The superconducting wire coil according to claim 1, wherein the area of the portion where the heater is in contact with the superconducting wire coil is 10 to 30% of the area of the outer surface of the superconducting wire coil where the heater is arranged. Superconducting switch.
一部のみをヒーターの加熱によって常電導状態とし、そ
の後は常電導状態となった部分から発生するジュール熱
によって超電導線材コイルを加熱することを特徴とする
請求項１、２又は３記載の超電導スイッチ。4. A superconducting wire coil is turned into a normal conducting state by heating only a part of the superconducting wire coil during a OFF operation, and thereafter, the superconducting wire coil is heated by Joule heat generated from the normal conducting portion. The superconducting switch according to claim 1, 2 or 3, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9074881A JPH10270765A (en) | 1997-03-27 | 1997-03-27 | Superconducting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9074881A JPH10270765A (en) | 1997-03-27 | 1997-03-27 | Superconducting switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10270765A true JPH10270765A (en) | 1998-10-09 |
Family
ID=13560153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9074881A Pending JPH10270765A (en) | 1997-03-27 | 1997-03-27 | Superconducting switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10270765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116779375A (en) * | 2022-03-09 | 2023-09-19 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | A thermally controlled superconducting switch for high temperature superconducting magnets |
-
1997
- 1997-03-27 JP JP9074881A patent/JPH10270765A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116779375A (en) * | 2022-03-09 | 2023-09-19 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | A thermally controlled superconducting switch for high temperature superconducting magnets |
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