JPH05182829A - Superconducting device and protective method of superconducting coil - Google Patents
Superconducting device and protective method of superconducting coilInfo
- Publication number
- JPH05182829A JPH05182829A JP3051059A JP5105991A JPH05182829A JP H05182829 A JPH05182829 A JP H05182829A JP 3051059 A JP3051059 A JP 3051059A JP 5105991 A JP5105991 A JP 5105991A JP H05182829 A JPH05182829 A JP H05182829A
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- Prior art keywords
- superconducting coil
- superconducting
- refrigerant container
- cooling medium
- partition
- Prior art date
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は超電導装置、及び超電導
コイルの保護方法に係り、特に、超電導状態に維持され
ている超電導コイルが常電導に転移した際に、新規な対
策が施された超電導装置、及び超電導コイルの保護方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting device and a method of protecting a superconducting coil, and more particularly, to a superconducting device which takes new measures when a superconducting coil maintained in a superconducting state is transferred to normal conducting. The present invention relates to a device and a method for protecting a superconducting coil.
【０００２】[0002]
【従来の技術】一般に、超電導装置では、超電導コイル
を超電導状態に維持することが必須であり、万一、超電
導状態が破壊され、常電導状態に転移した場合には、そ
れによる影響を極力少なくするようにしなければならな
い。2. Description of the Related Art Generally, in a superconducting device, it is essential to maintain a superconducting coil in a superconducting state. In the event that the superconducting state is destroyed and the state changes to the normal conducting state, the effect of this is minimized. I have to do it.
【０００３】従来の超電導装置では、超電導破壊、すな
わちクエンチ（超電導コイルが超電導状態から常電導状
態に遷移すること）した時、その超電導コイルの状態変
化に対応したものの例として、特開昭62−1209号公報や
特開昭62−18009 号公報に挙げられるようなものがあ
る。As an example of a conventional superconducting device, which corresponds to the state change of the superconducting coil when superconducting breakdown, that is, quenching (transition of superconducting coil from superconducting state to normal conducting state), is disclosed in Japanese Patent Laid-Open No. 62-62. 1209 and Japanese Patent Laid-Open No. 62-180909.
【０００４】すなわち、前者は超電導コイルがクエンチ
した時には、超電導コイルを冷却している液体ヘリウム
の蒸発損失量を抑えるように、超電導コイルと液体ヘリ
ウム貯槽部とを隔離した構造としている。一方、後者は
クエンチに伴うヘリウム容器内の圧力上昇を減らすた
め、超電導コイルの周囲をカバーし、液体ヘリウムの気
化速度を落としている。That is, in the former case, when the superconducting coil is quenched, the superconducting coil and the liquid helium storage tank are separated so that the evaporation loss of the liquid helium cooling the superconducting coil is suppressed. On the other hand, the latter covers the surroundings of the superconducting coil and reduces the vaporization rate of liquid helium in order to reduce the pressure increase in the helium container due to quenching.
【０００５】また、一般的には、回路的に超電導コイル
の破壊防止策として、超電導コイルと並列に保護抵抗を
接続し、クエンチ時に、超電導コイルのエネルギーを前
記保護抵抗で消費させて、クエンチした超電導コイルの
焼損を防ぐことが行なわれている。Further, in general, as a circuit-wise measure for preventing destruction of the superconducting coil, a protective resistor is connected in parallel with the superconducting coil, and at the time of quenching, the energy of the superconducting coil is consumed by the protective resistor for quenching. The burning of the superconducting coil is prevented.
【０００６】[0006]
【発明が解決しようとする課題】超電導コイルは、クエ
ンチの際、発生した常電導転移部は、コイル電流密度、
液体ヘリウムによる冷却条件等に応じて伝播する。特
に、安定性の高い超電導コイルでは、一般に、コイル電
流密度が低く、また、液体ヘリウムの冷却条件が良いた
め、常電導転移部の伝播速度は遅い。その結果、常電導
転移部のみが著しく局部加熱され、超電導コイルを焼損
する恐れがある。一方、常電導転移部の伝播速度が比較
的速い超電導コイルでも、コイル設計条件によっては同
様の問題が発生する恐れがある。すなわち、例えば、超
電導コイルの蓄積エネルギーに比べ、コイルインダクタ
ンスが大きい場合、導体、及び安定化材の断面積が小さ
いと局所的常電導転移現象に対して、著しい局部加熱に
より、超電導コイルを焼損する恐れがある。In the superconducting coil, the normal transition portion generated during quenching is
It propagates according to the cooling conditions with liquid helium. In particular, a superconducting coil having high stability generally has a low coil current density and good cooling conditions for liquid helium, so that the normal conduction transition portion has a low propagation speed. As a result, only the normal-conducting transition portion is remarkably locally heated, which may burn the superconducting coil. On the other hand, even in a superconducting coil in which the propagation speed of the normal conduction transition portion is relatively high, the same problem may occur depending on the coil design conditions. That is, for example, when the coil inductance is larger than the stored energy of the superconducting coil and the cross-sectional area of the conductor and the stabilizing material is small, local superconducting transition phenomenon occurs. There is a fear.
【０００７】従って、超電導コイルのクエンチ時、安全
性を高めるためには、常電導転移部の局部加熱を避ける
ため、常電導転移部の伝播速度を促進する積極的な手段
が必要である。Therefore, in order to improve safety during quenching of the superconducting coil, it is necessary to take an active means to accelerate the propagation speed of the normal conducting transition part in order to avoid local heating of the normal conducting transition part.
【０００８】上述した公知技術の特開昭62−1209号公
報、及び62−18009 号公報は、何れも液体ヘリウムの排
除が行なわれるが、常電導転移部の伝播速度を促進する
様な積極的・強制的な手段は示されていない。また、一
般的なクエンチ時のコイル破壊防止策である保護抵抗方
式（超電導コイルに並列に保護抵抗を接続し、コイルが
クエンチした場合、コイルの保有する磁気エネルギーの
大部分、または一部を前記保護抵抗で熱エネルギーの形
で消費させて、超電導コイルを保護するもの）も、常電
導転移部の局部加熱を防止するための常電導転移部伝播
速度の促進化を積極的・強制的に行うものではない。In the above-mentioned publicly known Japanese Patent Laid-Open Nos. 62-1209 and 62-180909, liquid helium is eliminated, but it is positive to accelerate the propagation speed of the normal-conduction transition part. -No compulsory measures are shown. In addition, a protection resistance method that is a general measure to prevent coil destruction during quenching (when a protection resistance is connected in parallel to a superconducting coil and the coil is quenched, most or part of the magnetic energy held by the coil is The one that protects the superconducting coil by dissipating it in the form of heat energy with a protective resistance) also positively and forcibly promotes the propagation speed of the normal conduction transition part to prevent local heating of the normal conduction transition part. Not a thing.
【０００９】本発明は、上述の点に鑑みなされたもの
で、その目的とするところは、簡単にクエンチ時におけ
る超電導コイルの破壊を防止して安全性の高い超電導装
置、及び超電導コイルの保護方法を提供するにある。The present invention has been made in view of the above points, and an object thereof is to easily prevent destruction of the superconducting coil at the time of quenching and to provide a highly safe superconducting device and a method for protecting the superconducting coil. To provide.
【００１０】[0010]
【課題を解決するための手段】本発明は、上記目的を達
成するために、クエンチ時の常電導転移部の伝播速度を
積極的・強制的に促進する外的因子・機構を有する様に
したものである。In order to achieve the above-mentioned object, the present invention has an external factor / mechanism for positively and forcibly promoting the propagation velocity of the normal-conducting transition portion during quenching. It is a thing.
【００１１】また、伝播速度を促進するために、超電導
コイルの温度を積極的・強制的に上昇させる機構を有す
る様にしたものである。Further, in order to accelerate the propagation speed, a mechanism for positively and forcibly increasing the temperature of the superconducting coil is provided.
【００１２】さらに、超電導コイルの温度を上昇させる
ために、液体ヘリウムを、前記超電導コイルの周辺から
積極的・強制的に除去する機構を有する様にしたもので
ある。また、同様の目的のために、前記超電導コイル
を、加熱する機構を有する様にしたものである。Further, in order to raise the temperature of the superconducting coil, a mechanism for positively and forcibly removing liquid helium from the periphery of the superconducting coil is provided. For the same purpose, the superconducting coil has a heating mechanism.
【００１３】上記の液体ヘリウムを強制的に除去するた
めに、前記超電導コイルと液体ヘリウム貯槽部を隔離
し、両者はそれぞれ独立のガス排出管を有し、遠隔操作
弁を介して連結されるようにしたものである。また同様
の目的のために、前記超電導コイルの外周を包囲する隔
壁と、これに遠隔操作低温弁を設けたものである。また
同様の目的のために、前記超電導コイルと液体ヘリウム
貯槽部を隔離し、両者はそれぞれ独立のガス排出管を有
し、遠隔操作弁を介して連結すると共に、前記液体ヘリ
ウム貯槽部に通ずる配管には、前記遠隔操作弁と連動す
る遠隔操作弁を経て、脱気装置が連結されるようにし
た。また同様の目的のために、前記超電導コイルの周囲
に配置される第１の液体ヘリウム貯槽を包囲するか、ま
たは下部に配置される第２のヘリウム貯液槽を有し、前
記第１のヘリウム貯液槽には遠隔操作の開閉装置を備え
るようにした。また同様の目的のために、前記超電導コ
イルの周囲に配置され、液体ヘリウムを貯液する液体ヘ
リウム貯槽に遠隔操作にて可動な液体ヘリウム低減スペ
ーサーを設けるようにした。また同様の目的のために、
前記超電導コイルと液体ヘリウム貯槽部を隔離した隔壁
内に液体ヘリウム加熱用ヒーターを設けるようにした。In order to forcibly remove the liquid helium, the superconducting coil and the liquid helium storage tank are separated from each other, and both have independent gas discharge pipes and are connected via a remote control valve. It is the one. Further, for the same purpose, a partition wall surrounding the outer circumference of the superconducting coil and a remote control cryogenic valve are provided on the partition wall. Further, for the same purpose, the superconducting coil and the liquid helium storage tank are separated from each other, and both have independent gas discharge pipes, are connected via a remote control valve, and are connected to the liquid helium storage tank. The deaeration device is connected to the remote control valve via a remote control valve interlocking with the remote control valve. For the same purpose, the first helium has a second liquid helium liquid storage tank that surrounds the first liquid helium storage tank that is arranged around the superconducting coil or has a second helium liquid storage tank that is arranged below the first liquid helium storage tank. The liquid storage tank was equipped with a remote-controlled opening / closing device. Further, for the same purpose, a liquid helium reducing spacer which is arranged around the superconducting coil and is movable by remote control is provided in a liquid helium storage tank for storing liquid helium. For similar purposes,
A heater for heating liquid helium was provided in a partition wall separating the superconducting coil and the liquid helium storage tank.
【００１４】[0014]
【作用】本発明の超電導装置は、クエンチ時の常電導転
移部の伝播速度を積極的・強制的に促進できるので、超
電導コイルのエネルギーの局所化を防ぐことができ、従
って、超電導コイルを焼損させることなく、安全性を高
めることができる。Since the superconducting device of the present invention can positively and forcibly promote the propagation velocity of the normal conducting transition portion during quenching, it is possible to prevent the energy of the superconducting coil from being localized. Therefore, the superconducting coil is burned out. It is possible to improve safety without causing it.
【００１５】クエンチ時には、超電導コイルの上部に設
けた遠隔操作弁を閉じることで上部空間を密閉させ、気
化したヘリウムガスによって液体ヘリウム液面を押し下
げ、これとともに超電導コイルの温度を上昇させ常電導
部の伝播を促進する。あるいは前記遠隔に設けた遠隔操
作低温弁を、通常の開状態から、クエンチ時は、閉じる
ことによって、同様に液体ヘリウム液面を押し下げると
ともに、超電導コイルの温度を上昇させ常電導部の伝播
を促進する。あるいは、クエンチ時には、隔壁上部の遠
隔操作弁の閉動作と連動させて、脱気装置に連結する第
２の遠隔操作弁を開けることによって、隔壁の外側の液
体ヘリウム液面位を引き上げ、結果的に隔壁内の液体ヘ
リウムの液面位を押し下げ、同様の作用を行う。あるい
は、クエンチ時には、隔壁上部の遠隔操作弁の閉動作と
連動させて、隔壁内に設けた液体ヘリウム加熱用ヒータ
ーを動作させ、隔壁内の超電導コイル周囲に存在する液
体ヘリウムを気化させて同様の作用を行う。At the time of quenching, the remote control valve provided above the superconducting coil is closed to close the upper space, and the liquid helium liquid surface is pushed down by the vaporized helium gas, and at the same time, the temperature of the superconducting coil is raised to increase the normal conducting portion. Promote the propagation of. Alternatively, by remotely closing the remote-controlled low-temperature valve provided from the normally open state during a quench, the liquid level of liquid helium is also pushed down and the temperature of the superconducting coil is raised to promote the propagation of the normal conducting part. To do. Alternatively, at the time of quenching, by interlocking with the closing operation of the remote control valve above the partition wall, the second remote control valve connected to the deaerator is opened to raise the liquid level of liquid helium outside the partition wall. Then, the liquid level of liquid helium in the partition wall is pushed down, and the same action is performed. Alternatively, at the time of quenching, the heater for liquid helium heating provided in the partition is operated in conjunction with the closing operation of the remote control valve above the partition, and the liquid helium existing around the superconducting coil in the partition is vaporized to perform the same operation. To act.
【００１６】隔壁を設けない場合でも、超電導コイルを
収納する液体ヘリウム貯液槽に設けた遠隔操作開閉板
を、クエンチ時には開けて液体ヘリウムを除去すること
で同様の作用を行う。あるいは、液体ヘリウム貯槽に、
十分な体積を有するスペーサーを設置しておき、クエン
チ時には、これを、液体ヘリウム貯液部から引き出して
ガスヘリウム空間に移動させることで、液体ヘリウムの
液面位を下げ同様の作用を行う。Even when the partition wall is not provided, the same operation is performed by opening the remote control opening / closing plate provided in the liquid helium liquid storage tank for accommodating the superconducting coil at the time of quenching to remove the liquid helium. Or in a liquid helium tank,
A spacer having a sufficient volume is installed in advance, and at the time of quenching, the spacer is pulled out from the liquid helium storage part and moved to the gas helium space, thereby lowering the liquid level of liquid helium and performing the same operation.
【００１７】[0017]
【実施例】以下、図面の実施例に基づいて本発明を詳細
に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments of the drawings.
【００１８】図１は、本発明の超電導装置の一実施例の
主要構成を示すものである。該図において、１は超電導
コイルで、この超電導コイル１は液体ヘリウム３の貯槽
を兼ねている恒温槽（冷媒容器）２に収納されている。
超電導コイル１の外周には、下部に連通口４を有する隔
壁５が設置されている。この隔壁５は、非磁性鋼や繊維
強化樹脂などの断熱性材料、または内部に真空槽を具備
した２重壁からなる。恒温槽２には、外部より液体ヘリ
ウムを供給する配管６と、気化したヘリウムガスを大気
に排出するか、図示していない冷凍機系へ回収する配管
７が取付けられている。恒温槽２の上部には、比較的口
径の大きいガス排出管８が設けてあり、安全装置９に直
結される一方、ガス回収配管１０に流量制御弁１１を介
して接続されている。配管１２は超電導コイル１への電
流リードを冷却するヘリウムガスの排出、または回収径
路である。隔壁５の上部にはガス排出管８に比べて口径
の小さなガス排出管１３が取付けられ、遠隔操作弁１４
を介してガス排出管８に接続されている。１５は、遠隔
操作弁１４の制御器、１６，１７，１８は液体ヘリウム
の液面センサーである。FIG. 1 shows the main structure of an embodiment of the superconducting device of the present invention. In the figure, 1 is a superconducting coil, and this superconducting coil 1 is housed in a constant temperature tank (refrigerant container) 2 which also serves as a storage tank for liquid helium 3.
On the outer circumference of the superconducting coil 1, a partition wall 5 having a communication port 4 at the bottom is installed. The partition wall 5 is made of a heat insulating material such as non-magnetic steel or fiber reinforced resin, or a double wall having a vacuum chamber inside. The thermostatic chamber 2 is provided with a pipe 6 for supplying liquid helium from the outside and a pipe 7 for discharging the vaporized helium gas to the atmosphere or collecting it in a refrigerator system (not shown). A gas discharge pipe 8 having a relatively large diameter is provided at the upper part of the thermostatic chamber 2 and is directly connected to the safety device 9 while being connected to the gas recovery pipe 10 via a flow control valve 11. The pipe 12 is a discharge or recovery path of helium gas for cooling the current lead to the superconducting coil 1. A gas discharge pipe 13 having a smaller diameter than the gas discharge pipe 8 is attached to the upper portion of the partition wall 5, and the remote control valve 14
It is connected to the gas exhaust pipe 8 via. Reference numeral 15 is a controller for the remote control valve 14, and 16, 17, 18 are liquid level sensors for liquid helium.
【００１９】次に本装置の動作について説明する。超電
導コイル１にクエンチが発生していない正常時は遠隔操
作弁１４が開かれており、流量制御弁１１により所定の
ガス量が排出されている。この時、ガス排出管８とガス
排出管１３の圧力が、原理的に等しくなるので、隔壁５
内の液体ヘリウム１９の液面は、隔壁５の外の液体ヘリ
ウム３の液面とほぼ同一レベルに保たれていて、超電導
コイル１を十分に冷却している。今、何らかの原因で、
超電導コイル１がクエンチを起こし始めたら、これを検
知し、直ちに遠隔操作弁１４を閉じる。超電導コイル１
に発生している常電導転移部の発熱によって液体ヘリウ
ムは徐々に気化していくが、前記遠隔操作弁１４によっ
て流路出口が塞がれているため、この蒸発ガスによっ
て、液体ヘリウム１９の液面を押し下げ、隔壁５内のガ
ス空間を広げる。これにより、超電導コイル１の温度を
高め、その結果、超電導コイル１の内部に発生した常電
導領域は、冷却能力の低下や温度の上昇に起因して急速
に拡大する。以上の動作、あるいはその繰り返しの結
果、所定の目的である常電導転移領域の積極的・強制的
促進化が達成される。尚、恒温槽２の内部の圧力が所定
値以上に上がった場合は、安全装置９が動作して、ヘリ
ウムガスを外部に放出する。安全装置９が動作中は、流
量制御弁１１は閉めておく。隔壁５内の液体ヘリウム１
９のガス相への遷移状況は、液体ヘリウムレベルセンサ
ー１７の信号により検知する。Next, the operation of this apparatus will be described. During normal operation when the superconducting coil 1 is not quenched, the remote control valve 14 is open and the flow control valve 11 discharges a predetermined amount of gas. At this time, since the pressures of the gas discharge pipe 8 and the gas discharge pipe 13 become equal in principle, the partition wall 5
The liquid level of the liquid helium 19 inside is kept at substantially the same level as the liquid level of the liquid helium 3 outside the partition wall 5, and the superconducting coil 1 is sufficiently cooled. Now for some reason,
When the superconducting coil 1 starts quenching, this is detected and the remote control valve 14 is immediately closed. Superconducting coil 1
The liquid helium gradually evaporates due to the heat generated in the normal conduction transition portion generated in the liquid helium, but since the outlet of the flow passage is blocked by the remote control valve 14, the liquid helium 19 is liquified by the vaporized gas. The surface is pushed down to widen the gas space in the partition wall 5. As a result, the temperature of the superconducting coil 1 is increased, and as a result, the normal-conducting region generated inside the superconducting coil 1 is rapidly expanded due to a decrease in cooling capacity and an increase in temperature. As a result of the above-mentioned operation, or the repetition thereof, a predetermined purpose, that is, positive / forced promotion of the normal-conduction transition region, is achieved. When the pressure inside the constant temperature bath 2 rises above a predetermined value, the safety device 9 operates to release the helium gas to the outside. The flow control valve 11 is closed while the safety device 9 is operating. Liquid helium in the partition 5
The transition state of 9 to the gas phase is detected by the signal of the liquid helium level sensor 17.
【００２０】図２は本発明の第２の実施例を示すもので
ある。該図に示す実施例は、隔壁５に遠隔操作可能な低
温弁２０が設けられ、正常時は、この低温弁２０は、必
要量としてわずかに開いており、ガスヘリウム気泡は、
この開口部から隔壁５外の液体ヘリウム部３に移動が可
能で、支障無く運転される。そして、超電導コイル１が
クエンチを起こし始めたら、前記低温弁２０を直ちに閉
じる。前記図１の実施例と同様、上部が密閉された状態
となるので、蒸発したヘリウムガスは、液体ヘリウム１
９の液面を押し下げ、結果的に超電導コイル１の温度を
高め、常電導領域は冷却能力の低下や温度の上昇に起因
して急速に拡大する。FIG. 2 shows a second embodiment of the present invention. In the embodiment shown in the figure, a low temperature valve 20 that can be remotely operated is provided in the partition wall 5, and in a normal state, the low temperature valve 20 is slightly opened as a necessary amount, and gas helium bubbles are
It is possible to move from this opening to the liquid helium part 3 outside the partition wall 5, and the operation is performed without any trouble. When the superconducting coil 1 starts to quench, the low temperature valve 20 is immediately closed. Similar to the embodiment of FIG. 1, the upper portion is in a sealed state, so that the evaporated helium gas is liquid helium 1
The liquid surface of 9 is pushed down, the temperature of the superconducting coil 1 is raised as a result, and the normal conducting region is rapidly expanded due to the decrease in cooling capacity and the increase in temperature.
【００２１】図３は本発明の第３の実施例を示すもので
ある。該図に示す本実施例は、ガス排出管８と、これに
分岐した配管に取りつけられ、遠隔操作弁１４と連動し
て動作する遠隔操作弁２４を介して脱気装置２５が取り
つけられている。超電導コイル１がクエンチを起こし始
めたら、遠隔操作弁１４を閉じるとともに、これに連動
して遠隔操作弁２４を開け、隔壁５外の上部ヘリウムガ
ス空間のガスを脱気（排気）する。これにより、隔壁５
外の液体ヘリウム３の液面が上昇し、隔壁５内の液体ヘ
リウム１９の液面が下がり結果的に、コイル常電導転移
部の伝播速度が促進される。FIG. 3 shows a third embodiment of the present invention. In the present embodiment shown in the figure, a degassing device 25 is attached to a gas discharge pipe 8 and a pipe branched from the gas discharge pipe 8 through a remote control valve 24 that operates in conjunction with the remote control valve 14. .. When the superconducting coil 1 starts to quench, the remote control valve 14 is closed, and in conjunction with this, the remote control valve 24 is opened to degas (exhaust) the gas in the upper helium gas space outside the partition wall 5. Thereby, the partition wall 5
The liquid level of the liquid helium 3 outside rises and the liquid level of the liquid helium 19 inside the partition wall 5 falls, and as a result, the propagation speed of the coil normal conduction transition portion is accelerated.
【００２２】図４は本発明の第４の実施例を示すもので
ある。該図に示す実施例は、恒温槽（ヘリウム貯液部）
２の外周側、もしくは下部に他のヘリウム貯液槽２６を
設けたものである。恒温槽２には、液体ヘリウムが容易
に移動可能な様な開閉装置、もしくは低温弁２７が設け
られている。超電導コイル１がクエンチを起こし始めた
ら、前記開閉装置２７を開け、液体ヘリウム３の必要量
をヘリウム貯液槽２６に移す。これにより、液体ヘリウ
ム３の液面位は下がり、超電導コイル１の常電導転移部
の伝播速度は促進される。FIG. 4 shows a fourth embodiment of the present invention. The embodiment shown in the figure is a thermostatic chamber (helium storage part).
Another helium liquid storage tank 26 is provided on the outer peripheral side of 2 or at the bottom. The constant temperature bath 2 is provided with an opening / closing device or a low temperature valve 27 so that liquid helium can be easily moved. When the superconducting coil 1 starts to quench, the opening / closing device 27 is opened and the required amount of liquid helium 3 is transferred to the helium liquid storage tank 26. As a result, the liquid level of the liquid helium 3 is lowered, and the propagation speed of the superconducting coil 1 in the normal conduction transition portion is accelerated.
【００２３】図５は本発明の第５の実施例を示すもので
ある。該図に示す実施例は、隔壁５内の液体ヘリウム１
９の貯液部に、液体ヘリウム加熱用ヒーター２９，３
０，３１が設置されている。超電導コイル１がクエンチ
を起こし始めたら、遠隔操作弁１４を直ちに閉じるが、
この状態で前記液体ヘリウム加熱用ヒーター２９，３
０，３１を動作させ、隔壁５内の液体ヘリウム１９を強
制的に気化させる。これにより、液体ヘリウム１９の液
面位は下がり、超電導コイル１の常電導転移部の伝播速
度は促進される。FIG. 5 shows a fifth embodiment of the present invention. In the embodiment shown in the figure, the liquid helium 1 in the partition 5 is
Liquid helium heating heaters 29, 3 in the liquid storage part of 9.
0 and 31 are installed. When the superconducting coil 1 starts to quench, the remote control valve 14 is immediately closed,
In this state, the heaters 29, 3 for heating the liquid helium
0 and 31 are operated to forcibly vaporize the liquid helium 19 in the partition wall 5. As a result, the liquid level of the liquid helium 19 is lowered, and the propagation velocity of the normal conduction transition portion of the superconducting coil 1 is accelerated.
【００２４】図６は本発明の第６の実施例を示すもので
ある。該図に示す実施例は、恒温槽（ヘリウム貯液部）
２の中には、移動可能な液体ヘリウム低減スペーサー３
３が収納されており、液体ヘリウム３の液面位を必要位
置に保ち超電導コイル１を十分に冷却している。今、何
らかの原因で超電導コイル１がクエンチを起こし始めた
ら、スペーサー３３の操作器３４により、スペーサー３
３を液体ヘリウム３の上部のガスヘリウム空間に引き上
げ液体ヘリウム３の中から、必要体積をとり出す。これ
により、液体ヘリウム３の液面位は下がり、超電導コイ
ル１の常電導転移部の伝播速度は促進される。FIG. 6 shows a sixth embodiment of the present invention. The embodiment shown in the figure is a thermostatic chamber (helium storage part).
In 2, there is a movable liquid helium reduction spacer 3
3 is stored, and the liquid level of liquid helium 3 is kept at a required position to sufficiently cool the superconducting coil 1. Now, if the superconducting coil 1 begins to quench for some reason, the spacer 3 is operated by the operating device 34 of the spacer 33.
3 is pulled up into the gas helium space above the liquid helium 3 and a necessary volume is taken out from the liquid helium 3. As a result, the liquid level of the liquid helium 3 is lowered, and the propagation speed of the superconducting coil 1 in the normal conduction transition portion is accelerated.
【００２５】以上、いくつかの実施例を説明してきた
が、これらの手段を併用することは勿論、常電導転移部
の伝播速度を積極的・強制的に促進させる手段、機構で
あればいかなるものでも良い。Although several embodiments have been described above, any means or mechanism may be used in combination with these means as well as any means or mechanism for positively and forcibly promoting the propagation velocity of the normal conduction transition portion. But good.
【００２６】[0026]
【発明の効果】以上説明した本発明によれば、超電導コ
イルがクエンチした時の常電導転移部の伝播速度を積極
的・強制的に促進する様にしたもので、特に、伝播速度
を促進するために、超電導コイルの温度を積極的・強制
的に上昇させる機構を有する様にしたり、超電導コイル
の温度を上昇させるために、液体ヘリウムを前記超電導
コイルの周辺から、積極的・強制的に除去する機構を有
する様にしたり、あるいは、前記超電導コイルを加熱す
る機構を有する様にしたものである。また、上記の液体
ヘリウムを強制的に除去するために、前記超電導コイル
と液体ヘリウム貯槽部を隔離し、両者はそれぞれ独立の
ガス排出管を有し、遠隔操作弁を介して連結されるよう
にしたり、前記超電導コイルの外周を包囲する隔壁と、
これに遠隔操作低温弁を設けたり、前記超電導コイルと
液体ヘリウム貯槽部を隔離し、両者はそれぞれ独立のガ
ス排出管を有し、遠隔操作弁を介して連結すると共に、
前記液体ヘリウム貯槽部に通ずる配管には、前記遠隔操
作弁と連動する遠隔操作弁を経て、脱気装置が連結され
るようにしたり、前記超電導コイルの周囲に配置される
第１の液体ヘリウム貯槽を包囲するか、または下部に配
置される第２のヘリウム貯液槽を有し、前記第１のヘリ
ウム貯液槽には遠隔操作の開閉装置を備えるようにした
り、前記超電導コイルの周囲に配置され、液体ヘリウム
を貯液する液体ヘリウム貯槽に遠隔操作にて可動な液体
ヘリウム低減スペーサーを設けるようにしたり、あるい
は前記超電導コイルと液体ヘリウム貯槽部を隔離した隔
壁内に液体ヘリウム加熱用ヒーターを設けるようにした
ものであるから、超電導コイルがクエンチした時、常電
導転移部の伝播速度を促進化できるので、超電導コイル
全体が速やかに常電導転移し、超電導コイルの蓄積エネ
ルギーの放出が局部に限定されることがなく、極めて安
全な超電導装置を得ることができる。According to the present invention described above, the propagation velocity of the normal conduction transition portion when the superconducting coil is quenched is positively and forcibly promoted. In particular, the propagation velocity is promoted. In order to increase the temperature of the superconducting coil, the liquid helium is actively and forcibly removed from the periphery of the superconducting coil in order to increase the temperature of the superconducting coil. Or a mechanism for heating the superconducting coil. Further, in order to forcibly remove the liquid helium, the superconducting coil and the liquid helium storage tank are separated from each other, and both have independent gas discharge pipes and are connected via a remote control valve. Or a partition wall surrounding the outer circumference of the superconducting coil,
This is provided with a remote control cryogenic valve, or the superconducting coil and the liquid helium storage tank are isolated from each other, both of which have independent gas discharge pipes and are connected via a remote control valve.
A degassing device is connected to a pipe that communicates with the liquid helium storage tank via a remote control valve that interlocks with the remote control valve, or a first liquid helium storage tank that is arranged around the superconducting coil. A second helium liquid storage tank that surrounds or is located at the bottom, and the first helium liquid storage tank is provided with a remote-controlled opening / closing device, or is arranged around the superconducting coil. The liquid helium storage tank for storing liquid helium is provided with a liquid helium reduction spacer that can be moved by remote control, or a liquid helium heating heater is provided in a partition wall separating the superconducting coil and the liquid helium storage tank. Therefore, when the superconducting coil is quenched, it is possible to accelerate the propagation speed of the normal conducting transition portion, so that the entire superconducting coil can be quickly maintained. And conductive transfer, without releasing the stored energy of the superconducting coil is limited to a local, it is possible to obtain a very safe superconducting device.
【図１】本発明の超電導装置の一実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of a superconducting device of the present invention.
【図２】本発明の他の実施例を示す断面図。FIG. 2 is a sectional view showing another embodiment of the present invention.
【図３】本発明の他の実施例を示す断面図。FIG. 3 is a sectional view showing another embodiment of the present invention.
【図４】本発明の他の実施例を示す断面図。FIG. 4 is a sectional view showing another embodiment of the present invention.
【図５】本発明の他の実施例を示す断面図。FIG. 5 is a sectional view showing another embodiment of the present invention.
【図６】本発明の他の実施例を示す断面図。FIG. 6 is a sectional view showing another embodiment of the present invention.
１…超電導コイル、２…恒温槽（ヘリウム容器）、３，
１９…液体ヘリウム、４…連通口、５…隔壁、８，１３
…ガス排出管、９…安全装置、１０…ガス回収配管、１
１…流量制御弁、１４，２４…遠隔操作弁、１５…制御
器、１６，１７，１８…液面センサー、２０…低温弁、
２５…脱気装置、２６…ヘリウム貯液槽、２７…開閉装
置、２９，３０，３１…液体ヘリウム加熱用ヒーター、
３３…スペーサー、３４…操作器。1 ... Superconducting coil, 2 ... Constant temperature bath (helium container), 3,
19 ... Liquid helium, 4 ... Communication port, 5 ... Partition wall, 8, 13
… Gas discharge pipe, 9… Safety device, 10… Gas recovery pipe, 1
DESCRIPTION OF SYMBOLS 1 ... Flow control valve, 14, 24 ... Remote control valve, 15 ... Controller, 16, 17, 18 ... Liquid level sensor, 20 ... Cryogenic valve,
25 ... Deaeration device, 26 ... Helium storage tank, 27 ... Opening / closing device, 29, 30, 31 ... Heater for heating liquid helium,
33 ... Spacer, 34 ... Manipulator.
フロントページの続き (72)発明者 小林 勇二 宮城県仙台市青葉区一番町三丁目７番１号 東北電力株式会社内 (72)発明者 上所 操 宮城県仙台市青葉区一番町三丁目７番１号 東北電力株式会社内Front page continuation (72) Inventor Yuji Kobayashi 3-1, Ichibancho, Aoba-ku, Sendai City, Miyagi Prefecture Tohoku Electric Power Co., Inc. No. 7-1 Tohoku Electric Power Co., Inc.
Claims (18)
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルが常電導転移した際、該超電導コイルを冷却
している冷却媒体を超電導コイル周辺から強制的に除去
する冷却媒体除去手段を有していることを特徴とする超
電導装置。1. A superconducting device comprising a superconducting coil and a refrigerant container accommodating the superconducting coil and accommodating a cooling medium for cooling the superconducting coil, when the superconducting coil undergoes normal conduction transition. A superconducting device comprising: a cooling medium removing means for forcibly removing a cooling medium cooling the superconducting coil from around the superconducting coil.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルの周囲を隔壁で包囲して前記冷媒容器内で独
立させ、この隔壁の上部に、該隔壁内で発生するガスを
排出する隔壁内ガス排出管を設けると共に、該隔壁の下
部に、この隔壁内と前記冷媒容器とを連通させる連通口
を設け、一方、前記冷媒容器の上部には、該冷媒容器内
で発生するガスを排出する冷媒容器内ガス排出管を設
け、該冷媒容器内ガス排出管と前記隔壁内ガス排出管
を、正常時は開放され、前記超電導コイルが常電導転移
した際に閉じる操作弁を介して連結したことを特徴とす
る超電導装置。2. A superconducting device comprising: a superconducting coil; and a refrigerant container containing the superconducting coil and a cooling medium for cooling the superconducting coil. The superconducting coil is surrounded by a partition wall. Independently inside the refrigerant container, a gas discharge pipe in the partition for discharging the gas generated in the partition is provided above the partition, and the inside of the partition and the refrigerant container are connected to each other below the partition. And a gas discharge pipe in the refrigerant container for discharging the gas generated in the refrigerant container, and the gas discharge pipe in the refrigerant container and the gas discharge pipe in the partition wall. Is connected through an operation valve which is normally opened and which is closed when the superconducting coil is transferred to the normal conducting state.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルの周囲を隔壁で包囲して前記冷媒容器内で独
立させ、該隔壁の下部に、この隔壁内と前記冷媒容器と
を連通させる連通口を設けると共に、該隔壁の上部には
開口が形成され、該開口部は、正常時には前記隔壁内か
ら隔壁外へ必要量の冷却媒体を流通させるべき開放し、
前記超電導コイルが常電導転移した際には閉じる低温弁
を有していることを特徴とする超電導装置。3. A superconducting device comprising a superconducting coil and a refrigerant container accommodating the superconducting coil and containing a cooling medium for cooling the superconducting coil, wherein the superconducting coil is surrounded by a partition wall. Independently in the refrigerant container, the lower part of the partition wall is provided with a communication port for communicating the inside of the partition wall with the refrigerant container, and an opening is formed in the upper part of the partition wall. Open to circulate the required amount of cooling medium from inside the partition to outside the partition,
A superconducting device having a low-temperature valve that closes when the superconducting coil changes to normal conducting.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルの周囲を隔壁で包囲して前記冷媒容器内で独
立させ、この隔壁の上部に、該隔壁内で発生するガスを
排出する隔壁内ガス排出管を設けると共に、該隔壁の下
部に、この隔壁内と前記冷媒容器とを連通させる連通口
を設け、一方、前記冷媒容器の上部には、該冷媒容器内
で発生するガスを排出する冷媒容器内ガス排出管を設
け、該冷媒容器内ガス排出管と前記隔壁内ガス排出管
を、正常時は開放され、前記超電導コイルが常電導転移
した際に閉じる操作弁を介して連結し、更に、前記冷媒
容器内ガス排出管の途中から分岐する配管の途中に前記
第１の操作弁と連動する第２の操作弁を設け、かつ、前
記配管の先端部に脱気装置を設置し、前記第１の操作弁
が閉じたら第２の操作弁を開放して、前記冷媒容器内か
らのガスを前記脱気装置で排気することを特徴とする超
電導装置。4. A superconducting device comprising: a superconducting coil; and a refrigerant container containing the superconducting coil and a cooling medium for cooling the superconducting coil. The superconducting coil is surrounded by a partition wall. Independently inside the refrigerant container, a gas discharge pipe in the partition for discharging the gas generated in the partition is provided above the partition, and the inside of the partition and the refrigerant container are connected to each other below the partition. And a gas discharge pipe in the refrigerant container for discharging the gas generated in the refrigerant container, and the gas discharge pipe in the refrigerant container and the gas discharge pipe in the partition wall. Are connected through an operation valve that is normally opened and that closes when the superconducting coil changes to the normal conduction state, and further, the first operation is performed in the middle of a pipe branched from the middle of the refrigerant container gas discharge pipe. Interlock with valve A second operation valve is provided, and a deaerator is installed at the tip of the pipe. When the first operation valve is closed, the second operation valve is opened to remove gas from the refrigerant container. A superconducting device which is exhausted by the deaerator.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記冷
媒容器の下部に、その周囲を包囲するよう貯液槽を設
け、かつ、該冷媒容器の下部には、内部の冷却媒体を前
記貯液槽に移動させる開閉装置を設け、該開閉装置は前
記超電導コイルが常電導転移し始めたら開放し、前記冷
媒容器内の冷却媒体を必要量前記貯液槽に移動させるも
のであることを特徴とする超電導装置。5. A superconducting device comprising: a superconducting coil; and a refrigerant container accommodating the superconducting coil and a cooling medium for cooling the superconducting coil. A liquid storage tank is provided so as to surround it, and an opening / closing device for moving an internal cooling medium to the liquid storage tank is provided in the lower portion of the refrigerant container, and the opening / closing device is provided when the superconducting coil starts to transfer to normal conduction. A superconducting device which is opened to move a required amount of the cooling medium in the refrigerant container to the liquid storage tank.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルが常電導転移した際、前記冷却媒体を気化さ
せる気化手段を有することを特徴とする超電導装置。6. A superconducting device comprising: a superconducting coil; and a refrigerant container accommodating the superconducting coil and containing a cooling medium for cooling the superconducting coil, when the superconducting coil undergoes normal conduction transition, A superconducting device comprising vaporizing means for vaporizing the cooling medium.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルの周囲を隔壁で包囲して前記冷媒容器内で独
立させ、この隔壁内に、前記超電導コイルが常電導転移
した際、前記隔壁内の冷却媒体を気化させる気化手段を
設けたことを特徴とする超電導装置。7. A superconducting device comprising: a superconducting coil; and a refrigerant container accommodating the superconducting coil and a cooling medium for cooling the superconducting coil, wherein the partition wall surrounds the superconducting coil. A superconducting device, which is independent in the refrigerant container, and which is provided with vaporizing means for vaporizing the cooling medium in the partition when the superconducting coil undergoes normal conduction transition.
れると共に、該超電導コイルを冷却する冷却媒体が収容
される冷媒容器とを備えた超電導装置において、前記超
電導コイルの周囲を隔壁で包囲して前記冷媒容器内で独
立させ、この隔壁内に、前記超電導コイルが常電導転移
した際、隔壁内の冷却媒体を気化させる気化手段を設
け、かつ、前記隔壁の上部に、該隔壁内で発生するガス
を排出する隔壁内ガス排出管を設けると共に、該隔壁の
下部に、この隔壁内と前記冷媒容器とを連通させる連通
口を設け、一方、前記冷媒容器の上部には、該冷媒容器
内で発生するガスを排出する冷媒容器内ガス排出管を設
け、該冷媒容器内ガス排出管と前記隔壁内ガス排出管
を、正常時は開放され、前記超電導コイルが常電導転移
した際に閉じる操作弁を介して連結したことを特徴とす
る超電導装置。8. A superconducting device comprising a superconducting coil and a refrigerant container accommodating the superconducting coil and containing a cooling medium for cooling the superconducting coil, wherein the partition wall surrounds the superconducting coil. Independently in the refrigerant container, vaporization means for vaporizing the cooling medium in the partition when the superconducting coil undergoes normal conduction transition is provided in the partition, and is generated in the partition above the partition. A gas discharge pipe in the partition wall for discharging the gas is provided, and a communication port for communicating the inside of the partition wall with the refrigerant container is provided in the lower part of the partition wall, while the inside of the refrigerant container is provided in the upper part of the refrigerant container. An operation for providing a gas discharge pipe in a refrigerant container for discharging the gas generated in 1., the gas discharge pipe in the refrigerant container and the gas discharge pipe in the partition wall are normally opened and closed when the superconducting coil makes a transition to normal conduction. valve Superconducting and wherein the linked via.
とを特徴とする請求項６，７、又は８記載の超電導装
置。9. The superconducting device according to claim 6, 7 or 8, wherein said vaporizing means is a heater for heating.
されると共に、該超電導コイルを冷却する冷却媒体が収
容される冷媒容器とを備えた超電導装置において、前記
冷媒容器内に冷却媒体に浸漬されてスペーサーを設置
し、該スペーサーは、前記超電導コイルが常電導転移し
た際に、前記冷媒容器の上方に移動されて冷却媒体の最
上面位置を低下させるものであることを特徴とする超電
導装置。10. A superconducting device comprising a superconducting coil and a refrigerant container accommodating the superconducting coil and a cooling medium for cooling the superconducting coil, wherein the cooling medium is immersed in the cooling medium. A spacer is installed, and the spacer is moved to above the refrigerant container to lower the uppermost surface position of the cooling medium when the superconducting coil undergoes normal conduction transition.
超電導状態が維持されている超電導コイルの一部が常電
導転移した際、該常電導転移部を速やかに超電導コイル
の他の部分まで広げるようにしたことを特徴とする超電
導コイルの保護方法。11. When a part of a superconducting coil, which is stored in a refrigerant container together with a cooling medium and maintains a superconducting state, undergoes a normal conduction transition, the normal conduction transition part is rapidly expanded to another portion of the superconducting coil. A method for protecting a superconducting coil, characterized in that
超電導状態が維持されている超電導コイルの一部が常電
導転移した際、該超電導コイルの温度を常電導転移部と
ほぼ同様な温度に上昇させることを特徴とする超電導コ
イルの保護方法。12. When a part of a superconducting coil, which is stored in a refrigerant container together with a cooling medium and maintains a superconducting state, undergoes a normal conduction transition, the temperature of the superconducting coil is brought to a temperature substantially similar to that of the normal conduction transition portion. A method for protecting a superconducting coil, which comprises raising the temperature.
超電導状態が維持されている超電導コイルの一部が常電
導転移した際、該超電導コイルを冷却している冷却媒体
を超電導コイル周辺から除去させることを特徴とする超
電導コイルの保護方法。13. A cooling medium for cooling a superconducting coil is removed from the periphery of the superconducting coil when a part of the superconducting coil which is stored in a refrigerant container together with the cooling medium and maintains the superconducting state undergoes normal conduction transition. A method for protecting a superconducting coil, which comprises:
超電導状態が維持されている超電導コイルの一部が常電
導転移した際、該超電導コイルを冷却している冷却媒体
をガス化して該冷却媒体量を減少させることを特徴とす
る超電導コイルの保護方法。14. A cooling medium which cools the superconducting coil is gasified when part of the superconducting coil which is stored in a refrigerant container together with the cooling medium and maintains the superconducting state undergoes normal conduction transition. A method for protecting a superconducting coil, which is characterized by reducing the amount of medium.
されると共に、該超電導コイルを冷却する冷却媒体が収
容される冷媒容器とを備えた超電導装置において、前記
超電導コイルが常電導転移した際、その常電導転移の伝
播速度を促進する常電導転移促進手段を有することを特
徴とする超電導装置。15. A superconducting device comprising: a superconducting coil; and a refrigerant container accommodating the superconducting coil and accommodating a cooling medium for cooling the superconducting coil, wherein the superconducting coil undergoes normal conduction transition. A superconducting device having a normal-conducting transition promoting means for promoting the propagation speed of the normal-conducting transition.
されると共に、該超電導コイルを冷却する冷却媒体が収
容される冷媒容器とを備えた超電導装置において、前記
超電導コイルが常電導転移した際、該超電導コイルの温
度を上昇せしめ常電導転移を促進する温度上昇手段を有
することを特徴とする超電導装置。16. A superconducting device comprising a superconducting coil and a refrigerant container accommodating the superconducting coil and accommodating a cooling medium for cooling the superconducting coil, when the superconducting coil undergoes normal conduction transition. A superconducting device comprising a temperature raising means for raising the temperature of the superconducting coil to promote the normal conducting transition.
されると共に、該超電導コイルを冷却する冷却媒体が収
容される冷媒容器とを備えた超電導装置において、前記
超電導コイルの一部が常電導転移した際、その常電導転
移部の伝播を促進する常電導転移促進手段を有すること
を特徴とする超電導装置。17. A superconducting device comprising: a superconducting coil; and a refrigerant container accommodating the superconducting coil and containing a cooling medium for cooling the superconducting coil. A superconducting device having a normal-conducting transition promoting means for promoting the propagation of the normal-conducting transition portion when the superconducting device is formed.
されると共に、該超電導コイルを冷却する冷却媒体が収
容される冷媒容器とを備えた超電導装置において、前記
超電導コイルの一部が常電導転移した際、該超電導コイ
ルの全体の温度を上昇せしめ常電導転移を促進する温度
上昇手段を有することを特徴とする超電導装置。18. A superconducting device comprising: a superconducting coil; and a refrigerant container accommodating the superconducting coil and containing a cooling medium for cooling the superconducting coil. A superconducting device having a temperature raising means for raising the temperature of the entire superconducting coil to promote normal-conducting transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5105991A JP3034621B2 (en) | 1991-03-15 | 1991-03-15 | Superconducting device and method for protecting superconducting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5105991A JP3034621B2 (en) | 1991-03-15 | 1991-03-15 | Superconducting device and method for protecting superconducting coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05182829A true JPH05182829A (en) | 1993-07-23 |
| JP3034621B2 JP3034621B2 (en) | 2000-04-17 |
Family
ID=12876234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5105991A Expired - Fee Related JP3034621B2 (en) | 1991-03-15 | 1991-03-15 | Superconducting device and method for protecting superconducting coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3034621B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007173460A (en) * | 2005-12-21 | 2007-07-05 | Mitsubishi Electric Corp | Superconducting electromagnet device |
| JP2007189227A (en) * | 2006-01-13 | 2007-07-26 | European High Temperature Superconductors Gmbh & Co Kg | Power adjusting method and device |
| GB2445591A (en) * | 2007-01-10 | 2008-07-16 | Siemens Magnet Technology Ltd | An emergency run-down unit for a superconducting magnet |
| WO2012062024A1 (en) * | 2010-11-10 | 2012-05-18 | 中国科学院电工研究所 | Device and method for measuring quenching propagation speed of superconducting coil |
| CN107110928A (en) * | 2014-12-31 | 2017-08-29 | 通用电气公司 | System and method for cooling down MR imaging apparatus |
| US9887028B2 (en) | 2014-09-03 | 2018-02-06 | Mitsubishi Electric Corporation | Superconducting magnet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6218009A (en) * | 1985-07-17 | 1987-01-27 | Mitsubishi Electric Corp | Superconductive magnet device |
| JPS6367708A (en) * | 1986-09-09 | 1988-03-26 | Mitsubishi Electric Corp | Superconducting magnet device with emergency demagnetizing device |
| JPH01278003A (en) * | 1988-04-29 | 1989-11-08 | Showa Electric Wire & Cable Co Ltd | Method of preventing breakdown of superconducting magnet |
-
1991
- 1991-03-15 JP JP5105991A patent/JP3034621B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6218009A (en) * | 1985-07-17 | 1987-01-27 | Mitsubishi Electric Corp | Superconductive magnet device |
| JPS6367708A (en) * | 1986-09-09 | 1988-03-26 | Mitsubishi Electric Corp | Superconducting magnet device with emergency demagnetizing device |
| JPH01278003A (en) * | 1988-04-29 | 1989-11-08 | Showa Electric Wire & Cable Co Ltd | Method of preventing breakdown of superconducting magnet |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007173460A (en) * | 2005-12-21 | 2007-07-05 | Mitsubishi Electric Corp | Superconducting electromagnet device |
| JP2007189227A (en) * | 2006-01-13 | 2007-07-26 | European High Temperature Superconductors Gmbh & Co Kg | Power adjusting method and device |
| GB2445591A (en) * | 2007-01-10 | 2008-07-16 | Siemens Magnet Technology Ltd | An emergency run-down unit for a superconducting magnet |
| GB2445591B (en) * | 2007-01-10 | 2009-01-28 | Siemens Magnet Technology Ltd | Emergency run-down unit for superconducting magnets |
| US8385033B2 (en) | 2007-01-10 | 2013-02-26 | Siemens Plc | Emergency run-down unit for superconducting magnets |
| WO2012062024A1 (en) * | 2010-11-10 | 2012-05-18 | 中国科学院电工研究所 | Device and method for measuring quenching propagation speed of superconducting coil |
| US9887028B2 (en) | 2014-09-03 | 2018-02-06 | Mitsubishi Electric Corporation | Superconducting magnet |
| CN107110928A (en) * | 2014-12-31 | 2017-08-29 | 通用电气公司 | System and method for cooling down MR imaging apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3034621B2 (en) | 2000-04-17 |
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