JP2002208512A - High-temperature superconducting coil cooling method and cooling structure - Google Patents
High-temperature superconducting coil cooling method and cooling structureInfo
- Publication number
- JP2002208512A JP2002208512A JP2001001361A JP2001001361A JP2002208512A JP 2002208512 A JP2002208512 A JP 2002208512A JP 2001001361 A JP2001001361 A JP 2001001361A JP 2001001361 A JP2001001361 A JP 2001001361A JP 2002208512 A JP2002208512 A JP 2002208512A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- cooling
- refrigerator
- superconducting coil
- heat
- 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.)
- Withdrawn
Links
Landscapes
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Motor Or Generator Cooling System (AREA)
- Linear Motors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高温超電導コイル
を冷却するための方法および冷却構造物に関し、特に、
固体冷媒を使用して冷凍機により直接冷却する高温超電
導コイルの冷却方法および冷却構造物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a cooling structure for cooling a high-temperature superconducting coil.
The present invention relates to a cooling method and a cooling structure for a high-temperature superconducting coil directly cooled by a refrigerator using a solid refrigerant.
【０００２】[0002]
【従来の技術】超電導体について、超電導状態を生成さ
せかつそれを安定に保つためには、超電導体を臨界温度
以下の温度で冷却することが必要である。その冷却方法
には、液体ヘリウム等の液体の冷媒により超電導体を冷
却する方式、および直接極低温冷凍機で冷却する方式等
がある。一般に、超電導マグネット等の冷却剤による冷
却は、液体ヘリウム中に直接超電導コイル等の被冷却体
が設けられる浸漬冷却方法と、真空容器中に設置された
被冷却体が循環ヘリウム等によって熱交換器を介して冷
却される強制循環冷却法とに大別することができる。冷
凍機を用いる方法では、必要とされる冷凍容量の規模に
よって形式の異なる種々の冷凍機が用いられる。ｋＷレ
ベルの冷凍能力が必要な場合、タービン型の膨張器を備
えた冷凍機が用いられる一方、酸化物超電導体のような
より高い冷凍温度で超電導状態が得られる材料を冷却す
る場合、ＳｏｌｖａｙやＧ−Ｍサイクルによる２段膨張
式冷凍機等を用いることができる。2. Description of the Related Art In order to generate a superconducting state and keep it stable, it is necessary to cool the superconductor at a temperature lower than a critical temperature. The cooling method includes a method of cooling the superconductor with a liquid refrigerant such as liquid helium, and a method of cooling directly with a cryogenic refrigerator. Generally, cooling with a coolant such as a superconducting magnet is performed by a immersion cooling method in which a cooled object such as a superconducting coil is directly provided in liquid helium, or a heat exchanger using a circulating helium or the like to cool the cooled object installed in a vacuum vessel. And a forced circulation cooling method in which cooling is performed through In the method using a refrigerator, various types of refrigerators having different types are used depending on the required refrigerating capacity. When a kW-level refrigeration capacity is required, a refrigerator equipped with a turbine-type expander is used. On the other hand, when cooling a material capable of obtaining a superconducting state at a higher refrigeration temperature such as an oxide superconductor, Solvay or For example, a two-stage expansion refrigerator using a GM cycle can be used.
【０００３】[0003]
【発明が解決しようとする課題】上述した冷却方式のう
ち、冷凍機による方式では、冷凍機が停止したとき、超
電導コイルの温度が短時間で上がり、急激にクエンチが
生じるおそれがある。たとえば、超電導コイルを使用す
るリニアモーターカーの場合、コイルがクエンチする
と、磁気力が消失し、磁気浮上が不可能になる。そのよ
うな事態が急激におこれば、運転事故につながる危険性
がある。Among the cooling methods described above, in the method using a refrigerator, when the refrigerator is stopped, the temperature of the superconducting coil rises in a short time, and there is a possibility that quench may occur rapidly. For example, in the case of a linear motor car using a superconducting coil, when the coil is quenched, the magnetic force is lost and magnetic levitation becomes impossible. If such a situation occurs suddenly, there is a risk of driving accident.
【０００４】本発明の目的は、冷凍機を使用した超電導
体の冷却方式について、冷凍機が停止しても超電導体の
クエンチを必要な時間くいとめることができる技術を提
供することにある。[0004] It is an object of the present invention to provide a technique for cooling a superconductor using a refrigerator, which can quench the superconductor for a required time even if the refrigerator is stopped.
【０００５】[0005]
【課題を解決するための手段】本発明により、高温超電
導コイルを冷凍機に取り付け、該コイルと該冷凍機との
間の直接的な熱伝導により、該コイルを冷却する方法が
提供され、該方法は、予測される外乱による該コイルへ
の侵入熱に対してヒートシンクとして機能できる量の固
体冷媒を該コイルの周囲に配置して、該コイルの冷却を
行うことを特徴とする。According to the present invention, there is provided a method of attaching a high temperature superconducting coil to a refrigerator and cooling the coil by direct heat conduction between the coil and the refrigerator. The method is characterized in that cooling of the coil is provided by placing an amount of solid refrigerant around the coil that can function as a heat sink against heat entering the coil due to expected disturbances.
【０００６】本発明において、該コイルに接触しかつ該
コイルの外側に所定の長さで突き出る熱伝導性の部材
を、該コイルに取りつけることが好ましい。そのような
部材は、必要な量の固体冷媒を保持するのに有効であ
る。そのような部材は、典型的に、コイルに取りつけら
れる円盤形状の冷却板である。固体冷媒は、少なくとも
該部材を覆うよう該コイルの周囲に配置することが好ま
しい。In the present invention, it is preferable that a heat conductive member that comes into contact with the coil and protrudes outside the coil by a predetermined length is attached to the coil. Such a member is effective to hold the required amount of solid refrigerant. Such a member is typically a disc-shaped cooling plate attached to the coil. Preferably, the solid refrigerant is arranged around the coil so as to cover at least the member.
【０００７】本発明において、コイルは、たとえば、リ
ニアモーターカーに設けられるものである。本発明の好
ましい態様において、固体冷媒は固体窒素である。In the present invention, the coil is provided, for example, in a linear motor car. In a preferred embodiment of the present invention, the solid refrigerant is solid nitrogen.
【０００８】また本発明により、上記冷却方法に使用さ
れる冷却構造物が提供され、該冷却構造物は、高温超電
導コイルと、該コイルに取りつけられた、該コイルに接
触しかつ該コイルの外側に所定の長さで突き出る熱伝導
性の部材とを備える。According to the present invention, there is further provided a cooling structure used in the above-mentioned cooling method, the cooling structure comprising a high-temperature superconducting coil, and a coil attached to the coil and in contact with the coil and outside the coil. And a thermally conductive member protruding at a predetermined length.
【０００９】[0009]
【発明の実施の形態】図１に本発明による方法に使用さ
れる冷却構造物の一例を示す。冷却構造物１０におい
て、冷凍機（図示せず）により冷却すべき複数のパンケ
ーキ型高温超電導コイル１１が積み重ねられている。コ
イル１１の積層体において、隣り合うコイル１１同士の
間には、図２に示すような円盤形状の冷却板１２が配置
されている。冷却板１２は、良熱伝導体からなる。複数
の冷却板１２は、コイル１１に接触し、コイル１１とと
もに積層されている。また、冷却板１２は、コイル１１
の積層体から所定の長さで外側に突き出るような外径を
有する。図１に示すように、本発明によれば、冷却板１
２のコイル積層体から突き出た部分１２ａ上に固体冷媒
１３、典型的に固体窒素が配置された状態で、冷凍機に
よるコイル１１の冷却が行われる。本発明では、該突き
出た部分１２ａを少なくとも覆うよう固体冷媒１３を配
置することが好ましい。FIG. 1 shows an example of a cooling structure used in the method according to the present invention. In the cooling structure 10, a plurality of pancake-type high-temperature superconducting coils 11 to be cooled by a refrigerator (not shown) are stacked. In the laminated body of the coils 11, a disc-shaped cooling plate 12 as shown in FIG. 2 is arranged between the adjacent coils 11. The cooling plate 12 is made of a good heat conductor. The plurality of cooling plates 12 are in contact with the coil 11 and are stacked together with the coil 11. In addition, the cooling plate 12 is
Has an outer diameter protruding outward at a predetermined length from the laminate. According to the present invention, as shown in FIG.
The cooling of the coil 11 by the refrigerator is performed in a state where the solid refrigerant 13, typically solid nitrogen, is disposed on the portion 12a protruding from the coil stack of No. 2. In the present invention, it is preferable to dispose the solid refrigerant 13 so as to cover at least the protruding portion 12a.
【００１０】コイル１１は普通ダブルパンケーキ構造で
巻線されるが、そのようダブルパンケーキの間に良熱伝
導性の冷却板１２を冷凍機のコールドヘッドに繋がるよ
う挿入すれば、パンケーキの冷却効率を上げることがで
きる。また、冷却板１２の外径をコイル１１の外径より
十分大きくして固体冷媒（典型的に固体窒素）と冷却板
との接触面積を広くすれば、固体冷媒の比較的小さい熱
伝導率を補い、コイル１１からの発熱を固体冷媒の内部
に効率よく逃がすことができる。こうすれば、固体冷媒
の内部において顕著な温度分布が生じるのを回避するこ
とができる。The coil 11 is usually wound in a double pancake structure. If a cooling plate 12 having good thermal conductivity is inserted between such double pancakes so as to be connected to the cold head of the refrigerator, the coil 11 is formed. Cooling efficiency can be increased. If the outer diameter of the cooling plate 12 is made sufficiently larger than the outer diameter of the coil 11 to increase the contact area between the solid refrigerant (typically, solid nitrogen) and the cooling plate, a relatively small thermal conductivity of the solid refrigerant can be obtained. In other words, heat generated from the coil 11 can be efficiently released into the solid refrigerant. In this way, it is possible to avoid occurrence of a remarkable temperature distribution inside the solid refrigerant.
【００１１】冷却板１２には、熱伝導率の高い任意の材
料を使用することができる。そのような材料には、銅、
アルミニウム等の熱伝導率の比較的高い金属が含まれ
る。一方、コイル磁場によって渦電流が発生しないよう
な材料を冷却板１２に使用することが好ましい。したが
って、比較的高い熱伝導率を有しかつ顕著な渦電流を発
生しない、Ｃｕ−Ｎｉ合金等の銅合金、高強度アルミニ
ウム合金を冷却板１２に用いることがより好ましい。The cooling plate 12 can be made of any material having a high thermal conductivity. Such materials include copper,
Metals having relatively high thermal conductivity such as aluminum are included. On the other hand, a material that does not generate eddy current due to the coil magnetic field is preferably used for the cooling plate 12. Therefore, it is more preferable to use a copper alloy such as a Cu—Ni alloy or a high-strength aluminum alloy having a relatively high thermal conductivity and not generating a remarkable eddy current for the cooling plate 12.
【００１２】本発明による方法では、予測される外乱に
よるコイルへの侵入熱に対してヒートシンクとして機能
できる量の固体冷媒をコイルの周囲に配置する。したが
って、冷却板１２のコイル積層体から突き出た部分１２
ａの長さは、ヒートシンクとして機能できる量の固体冷
媒を冷却板１２上に保持できるよう、設定することが好
ましい。外乱によるコイルへの侵入熱は、たとえば、外
部磁場によるコイルの交流損失により予測することがで
きる。そのような予測に基づいて求められた固体冷媒の
必要量をコイルの周囲に効率よく保持できるよう、冷却
板２１の外径が決定される。In the method according to the present invention, an amount of the solid refrigerant that can function as a heat sink against heat entering the coil due to a predicted disturbance is disposed around the coil. Therefore, the portion 12 of the cooling plate 12 protruding from the coil laminate
It is preferable that the length of “a” is set so that an amount of solid refrigerant that can function as a heat sink can be held on the cooling plate 12. The heat entering the coil due to the disturbance can be predicted, for example, by the AC loss of the coil due to the external magnetic field. The outer diameter of the cooling plate 21 is determined so that the required amount of the solid refrigerant obtained based on such a prediction can be efficiently held around the coil.
【００１３】図３（ａ）および（ｂ）に、図１に示す冷
却構造物を使用して、高温超電導コイルを冷却するプロ
セスを示す。図３（ａ）に示すとおり、高温超電導コイ
ル１１および冷却板１２を含む冷却構造物１０は、冷凍
機３１の冷却ステージ（コールドヘッド）３１ａに取り
付けられる。コイル１１および冷却板１２が取付けられ
た冷凍機３１の冷却ステージ３１ａは、容器３４内に収
容される。容器３４は、たとえば、真空によって断熱を
行なう１層以上の断熱壁を備えることができる。高温超
電導コイル１１には、電力供給のための電流リード３５
が接続される。冷却ステージ３１ａを収容する容器３４
には、液体窒素等の液体の冷却剤３３がまず充填され
る。液体の冷却剤３３は、超電導コイル１１を収容する
容器３４の空間内に注入することができる。冷却ステー
ジ３１ａに取付けられた超電導コイル１１は、液体の冷
却剤３３に浸漬され、冷却剤の温度（たとえば液体窒素
の場合、約７７Ｋ）まで、まず冷却される。FIGS. 3A and 3B show a process of cooling the high-temperature superconducting coil using the cooling structure shown in FIG. As shown in FIG. 3A, the cooling structure 10 including the high-temperature superconducting coil 11 and the cooling plate 12 is attached to a cooling stage (cold head) 31 a of the refrigerator 31. The cooling stage 31 a of the refrigerator 31 to which the coil 11 and the cooling plate 12 are attached is housed in a container 34. The container 34 can include, for example, one or more layers of heat insulating walls that are insulated by vacuum. The high-temperature superconducting coil 11 has a current lead 35 for supplying power.
Is connected. Container 34 for accommodating cooling stage 31a
Is first filled with a liquid coolant 33 such as liquid nitrogen. The liquid coolant 33 can be injected into the space of the container 34 that houses the superconducting coil 11. The superconducting coil 11 attached to the cooling stage 31a is immersed in a liquid coolant 33 and first cooled to the temperature of the coolant (for example, about 77K in the case of liquid nitrogen).
【００１４】次に、冷凍機３１の運転を始め、冷却ステ
ージ３１ａ上の被冷却物を、冷却ステージ３１ａと被冷
却物との間の直接的な熱伝導により冷却する。冷却構造
物１０が冷却剤の固体−液体共存温度（たとえば液体窒
素の場合６３．１Ｋ）以下に冷凍機３１によって冷却さ
れると、該温度において冷却構造物１０の周囲に固化さ
れた冷却剤（たとえば固体窒素）が生成されるようにな
る。冷却板１２は、冷却材３３の冷凍機３１による冷却
を促進し、すみやかな固化に寄与する。そして、冷却構
造物１０は、固化された冷却剤３３’によって覆われ
る。このような状態を図３（ｂ）に示す。冷却ステージ
３１ａに取付けられた超電導コイル１１および冷却板１
２は、固化された冷却剤（たとえば固体窒素）３３’に
よって覆われている。このような状態で、超電導コイル
１１を冷凍機３１によって冷却し、コイル１１を超電導
状態に維持する。コイル１１は、冷凍機３１の冷凍能力
に従って冷却され、所定の温度たとえば２０Ｋまたはそ
れ以下の温度まで冷却される。Next, the operation of the refrigerator 31 is started, and the object to be cooled on the cooling stage 31a is cooled by direct heat conduction between the cooling stage 31a and the object to be cooled. When the cooling structure 10 is cooled by the refrigerator 31 below the solid-liquid coexistence temperature of the coolant (for example, 63.1K in the case of liquid nitrogen), the coolant solidified around the cooling structure 10 at that temperature ( For example, solid nitrogen) is generated. The cooling plate 12 promotes cooling of the coolant 33 by the refrigerator 31 and contributes to quick solidification. Then, the cooling structure 10 is covered with the solidified coolant 33 '. Such a state is shown in FIG. Superconducting coil 11 and cooling plate 1 attached to cooling stage 31a
2 is covered by a solidified coolant (eg, solid nitrogen) 33 '. In such a state, superconducting coil 11 is cooled by refrigerator 31, and coil 11 is maintained in a superconducting state. The coil 11 is cooled according to the refrigerating capacity of the refrigerator 31 and is cooled to a predetermined temperature, for example, 20 K or lower.
【００１５】固体窒素のような固体冷媒の熱容量は、液
体の状態に比べて１桁大きい。そのような固体冷媒は、
液体冷媒に比べて、侵入熱に対し温度が上昇しにくい。
したがって、固体冷媒をコイルの周囲に配置した状態で
コイルを冷却すれば、外乱による熱を固体冷媒に吸収さ
せ、コイルの温度上昇を設計した温度マージンの範囲内
に容易に収めることができる。冷却中、所定量の固体冷
媒でコイルを覆っておけば、たとえ冷凍機が停止して
も、コイルにおいて発生し得る熱を固体冷媒に吸収さ
せ、所定の時間（たとえば、冷凍機の運転を復帰できる
時間、具体的にはたとえば１時間）、コイルの温度上昇
を所定の温度マージン以下に抑え、コイルの超電導状態
を維持しておくことができる。このようにして急激なク
エンチの発生を阻止し、安定したコイルの運転が可能に
なる。このような外乱による熱を吸収するのに必要な固
体冷媒の量は、コイルのサイズ、外乱によるコイル発熱
量等に応じて見積もることができる。そのようにして見
積もった固体冷媒の必要量に応じて、冷却板のコイルか
ら突き出る長さ（あるいは冷却板の外径またはサイズ）
を設定することができる。The heat capacity of a solid refrigerant such as solid nitrogen is one order of magnitude greater than that of a liquid state. Such solid refrigerants
As compared to liquid refrigerant, the temperature is less likely to rise due to intrusion heat.
Therefore, if the coil is cooled in a state where the solid refrigerant is arranged around the coil, heat caused by disturbance can be absorbed by the solid refrigerant, and the temperature rise of the coil can be easily kept within a designed temperature margin. If the coil is covered with a predetermined amount of solid refrigerant during cooling, even if the refrigerator is stopped, the heat that can be generated in the coil is absorbed by the solid refrigerant, and the operation of the refrigerator is resumed for a predetermined time (for example, As long as possible (specifically, for example, one hour), the temperature rise of the coil can be suppressed to a predetermined temperature margin or less, and the superconducting state of the coil can be maintained. In this way, rapid quench is prevented from occurring, and stable operation of the coil becomes possible. The amount of the solid refrigerant required to absorb the heat due to the disturbance can be estimated according to the size of the coil, the heat generated by the coil due to the disturbance, and the like. The length protruding from the coil of the cooling plate (or the outside diameter or size of the cooling plate) according to the estimated amount of the solid refrigerant thus estimated.
Can be set.
【００１６】なお、マグネットシステムの総容量を抑
え、コンパクトなシステムを得るには、コイルの周囲に
配置する固体冷媒の量を必要最小限にすることが好まし
い。このような観点からは、上記装置において、冷却ス
テージ、冷却構造物および冷媒を収容する容器の大きさ
（容積）は必要最小限に設計することが好ましい。In order to suppress the total capacity of the magnet system and obtain a compact system, it is preferable to minimize the amount of solid refrigerant disposed around the coil. From such a viewpoint, in the above-described apparatus, it is preferable that the size (volume) of the cooling stage, the cooling structure, and the container accommodating the refrigerant be designed to the minimum necessary.
【００１７】本発明において、冷凍機には、必要とされ
る冷凍容量の規模によって種々の冷凍機を用いることが
できる。たとえば、蓄冷式冷凍サイクルを利用したもの
で、一般にクライオクーラと呼ばれる冷凍機を好ましく
用いることができる。具体的には、ＳｏｌｖａｙやＧ−
Ｍサイクルによる２段膨張式冷凍機（Ｓｏｌｖａｙ冷凍
機およびＧＭ冷凍機）が好ましく用いられる。一方、ス
ターリング冷凍機を使用してもよい。本発明では、これ
らの形式の１０Ｋ程度まで冷却できる市販の冷凍機を典
型的に使用することができる。本発明では、２またはそ
れ以上の冷却ステージを冷凍機を用いることができる。
複数の冷却ステージを有する多段式冷凍機を用いる場
合、冷却剤の表面を、到達温度の高い冷却ステージと到
達温度の低い冷却ステージとの間に配置させることが好
ましい。In the present invention, various types of refrigerators can be used depending on the required refrigerating capacity. For example, a refrigerator using a regenerative refrigeration cycle, and a refrigerator generally called a cryocooler can be preferably used. Specifically, Solvey and G-
An M-cycle two-stage expansion refrigerator (Solvay refrigerator and GM refrigerator) is preferably used. On the other hand, a Stirling refrigerator may be used. In the present invention, these types of commercially available refrigerators capable of cooling to about 10K can be typically used. In the present invention, a refrigerator can be used for two or more cooling stages.
When a multi-stage refrigerator having a plurality of cooling stages is used, it is preferable to arrange the surface of the coolant between a cooling stage having a high ultimate temperature and a cooling stage having a low ultimate temperature.
【００１８】本発明では、コイルの周囲に配置させる冷
媒として、飽和蒸気圧温度が液体ヘリウムよりも高い冷
媒を用いることができる。用いられる冷媒として、窒素
の他に、水素、酸素、ネオン、アルゴン、天然ガス、ア
ンモニア、およびその混合物等を挙げることができる。
たとえば、大気圧下の飽和蒸気圧温度が１５Ｋ〜１００
Ｋである冷媒を好ましく用いることができる。冷却剤と
して窒素を用いる場合、大気圧下において冷凍機の冷却
により液体窒素を固体窒素に変えることができる。In the present invention, a refrigerant having a saturated vapor pressure higher than that of liquid helium can be used as the refrigerant disposed around the coil. As the refrigerant used, in addition to nitrogen, hydrogen, oxygen, neon, argon, natural gas, ammonia, a mixture thereof, and the like can be given.
For example, when the saturated vapor pressure temperature under atmospheric pressure is 15K to 100
A refrigerant that is K can be preferably used. When nitrogen is used as a coolant, liquid nitrogen can be changed to solid nitrogen by cooling a refrigerator under atmospheric pressure.
【００１９】本発明において、高温超電導コイルを構成
する超電導体は、典型的に、酸化物超電導体等のより高
い臨界温度を有する超電導体である。酸化物超電導体に
は、Ｙ1Ｂａ2Ｃｕ3Ｏ7-Y（０≦Ｙ＜１）等のイットリウ
ム系酸化物超電導体、Ｂｉ2Ｓｒ2Ｃａ1Ｃｕ2Ｏ8-Y、Ｂ
ｉ2Ｓｒ2Ｃａ2Ｃｕ3Ｏ10-X、（Ｂｉ，Ｐｂ）2Ｓｒ2Ｃａ
1Ｃｕ2Ｏ8-X、（Ｂｉ，Ｐｂ）2Ｓｒ2Ｃａ2Ｃｕ3Ｏ10-X
（０≦Ｘ＜１）等のビスマス系酸化物超電導体、Ｔｌ1
Ｂａ2Ｃａ2Ｃｕ3Ｏ9-X 、Ｔｌ2Ｂａ2Ｃａ2Ｃｕ3Ｏ10-Z
（０≦Ｚ＜１）等のタリウム系酸化物超電導体などがあ
る。本発明において、超電導コイルには、パンケーキ型
のコイルのほか、ソレノイド型のコイルも使用すること
ができる。超電導コイルの数は任意であり、１個のコイ
ルについて本発明を適用してもよいし、複数のコイルに
本発明を適用してもよい。In the present invention, the superconductor constituting the high-temperature superconducting coil is typically a superconductor having a higher critical temperature, such as an oxide superconductor. The oxide superconductor includes an yttrium-based oxide superconductor such as Y 1 Ba 2 Cu 3 O 7 -Y (0 ≦ Y <1), Bi 2 Sr 2 Ca 1 Cu 2 O 8-Y , B
i 2 Sr 2 Ca 2 Cu 3 O 10-x , (Bi, Pb) 2 Sr 2 Ca
1 Cu 2 O 8-X , (Bi, Pb) 2 Sr 2 Ca 2 Cu 3 O 10-X
Bismuth-based oxide superconductor such as (0 ≦ X <1), Tl 1
Ba 2 Ca 2 Cu 3 O 9 -X, Tl 2 Ba 2 Ca 2 Cu 3 O 10-Z
There is a thallium-based oxide superconductor such as (0 ≦ Z <1). In the present invention, a superconducting coil may be a pancake coil or a solenoid coil. The number of superconducting coils is arbitrary, and the present invention may be applied to one coil or the present invention may be applied to a plurality of coils.
【００２０】本発明は、リニアモータカー（ＭＡＧＬＥ
Ｖ）、種々の産業用マグネットや電力機器用マグネット
等の超電導コイルを使用する種々の装置や機器に適用す
ることができる。たとえば、本発明をリニアモータカー
等に使用される車載用超電導コイルに使用した場合、事
故で冷凍機の電源が停止した場合でも、所定の時間コイ
ルの顕著な温度上昇をくいとめることができ、輸送手段
の安全を確保することができる。The present invention relates to a linear motor car (MAGLE).
V), and can be applied to various devices and devices using superconducting coils such as various industrial magnets and power device magnets. For example, when the present invention is used for an in-vehicle superconducting coil used in a linear motor car or the like, even if the power of the refrigerator is stopped due to an accident, it is possible to suppress a remarkable temperature rise of the coil for a predetermined time, and Safety can be ensured.
【００２１】[0021]
【発明の効果】本発明の方法によれば、冷凍機が停止し
ても一定期間コイルを運転させることができる。本発明
の冷却構造によれば、コイルの周囲における固体冷媒の
生成を促進することができ、さらに、コイルの発熱を容
易に固体冷媒に伝えてコイル温度の上昇を効果的にくい
とめることができる。本発明は、超電導コイルを使用す
る種々のシステム、装置、および機器に適用できるが、
たとえば、リニアモータカーのマグネットシステムに使
用すれば、冷凍機が停止しても、コイルの運転を一定時
間行わせることができ、輸送手段の安全を確保すること
ができる。According to the method of the present invention, the coil can be operated for a certain period even if the refrigerator is stopped. ADVANTAGE OF THE INVENTION According to the cooling structure of this invention, generation | occurrence | production of the solid refrigerant | coolant in the periphery of a coil can be promoted, Furthermore, the heat generation of a coil can be easily transmitted to a solid refrigerant | coolant, and it can be determined that it is difficult to raise the coil temperature effectively. Although the present invention is applicable to various systems, devices, and devices that use superconducting coils,
For example, if used in a magnet system of a linear motor car, even if the refrigerator is stopped, the operation of the coil can be performed for a certain period of time, and the safety of the transportation means can be ensured.
【図１】 本発明による冷却構造物の一例を示す側面図
である。FIG. 1 is a side view showing an example of a cooling structure according to the present invention.
【図２】 図１に示す冷却構造物の冷却板の１つを示す
斜視図である。FIG. 2 is a perspective view showing one of cooling plates of the cooling structure shown in FIG.
【図３】 （ａ）および（ｂ）は、図１に示す冷却構造
を使用して、本発明により超電導コイルを冷却していく
様子を示す模式図である。FIGS. 3A and 3B are schematic views showing a state in which a superconducting coil is cooled according to the present invention using the cooling structure shown in FIG.
１０ 冷却構造物、１１ 高温超電導コイル、１２ 冷
却板、３１ 冷凍機、３１ａ 冷却ステージ、３３ 冷
却剤、３４ 容器。Reference Signs List 10 cooling structure, 11 high-temperature superconducting coil, 12 cooling plate, 31 refrigerator, 31a cooling stage, 33 coolant, 34 container.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｋ 41/02 ＺＡＡ Ｈ０１Ｆ 5/08 ＺＡＡＧ Ｆターム(参考） 5H113 AA01 CC01 DB14 DC14 KK02 KK10 5H609 BB07 BB08 BB19 PP02 PP09 QQ06 QQ21 QQ23 RR46 RR61 RR73 RR74 5H641 GG01 GG07 GG21 JB03 JB05──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H02K 41/02 ZAA H01F 5/08 ZAAG F-term (Reference) 5H113 AA01 CC01 DB14 DC14 KK02 KK10 5H609 BB07 BB08 BB19 PP02 PP09 QQ06 QQ21 QQ23 RR46 RR61 RR73 RR74 5H641 GG01 GG07 GG21 JB03 JB05
Claims (5)
前記コイルと前記冷凍機との間の直接的な熱伝導によ
り、前記コイルを冷却する方法において、 予測される外乱による前記コイルへの侵入熱に対してヒ
ートシンクとして機能できる量の固体冷媒を前記コイル
の周囲に配置して、前記コイルの冷却を行うことを特徴
とする、高温超電導コイルの冷却方法。1. A high-temperature superconducting coil is attached to a refrigerator.
In a method for cooling the coil by direct heat conduction between the coil and the refrigerator, an amount of solid refrigerant that can function as a heat sink against heat entering the coil due to predicted disturbance A cooling method for cooling the high-temperature superconducting coil, wherein the cooling is performed by disposing the coil around the coil.
側に所定の長さで突き出る熱伝導性の部材が、前記コイ
ルに取りつけられる、請求項１に記載の冷却方法。2. The cooling method according to claim 1, wherein a heat conductive member that contacts the coil and projects a predetermined length outside the coil is attached to the coil.
けられるものである、請求項１または２に記載の冷却方
法。3. The cooling method according to claim 1, wherein the coil is provided in a linear motor car.
１〜３のいずれか１項に記載の冷却方法。4. The cooling method according to claim 1, wherein said solid refrigerant is solid nitrogen.
前記コイルの外側に所定の長さで突き出る熱伝導性の部
材とを備える、請求項２に記載の冷却方法に使用される
冷却構造物。5. The cooling system according to claim 2, further comprising a high-temperature superconducting coil, and a heat conductive member attached to the coil and in contact with the coil and protruding outside the coil by a predetermined length. Cooling structure used in the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001001361A JP2002208512A (en) | 2001-01-09 | 2001-01-09 | High-temperature superconducting coil cooling method and cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001001361A JP2002208512A (en) | 2001-01-09 | 2001-01-09 | High-temperature superconducting coil cooling method and cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002208512A true JP2002208512A (en) | 2002-07-26 |
Family
ID=18870012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001001361A Withdrawn JP2002208512A (en) | 2001-01-09 | 2001-01-09 | High-temperature superconducting coil cooling method and cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002208512A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005237060A (en) * | 2004-02-17 | 2005-09-02 | Sumitomo Electric Ind Ltd | Cooling system for superconductive motor |
| JP2007321050A (en) * | 2006-05-31 | 2007-12-13 | Kyoto Univ | Cryogenic cold-storing medium, and cryogenic refrigeration method and cryogenic refrigeration system, using the same |
| EP1953772A2 (en) | 2007-02-05 | 2008-08-06 | Hitachi, Ltd. | Magnetic field generator |
| JP2008283803A (en) * | 2007-05-11 | 2008-11-20 | Railway Technical Res Inst | Superconducting magnet for magnetic-levitation railway vehicle |
| JP2008279917A (en) * | 2007-05-11 | 2008-11-20 | Railway Technical Res Inst | Operation system of super-conductive magnet for magnetically-suspended railway vehicle |
| JP2010262950A (en) * | 2009-04-29 | 2010-11-18 | Mitsubishi Electric Corp | Superconducting electromagnet and transport method therefor |
| JP2011035216A (en) * | 2009-08-04 | 2011-02-17 | Railway Technical Res Inst | Re-based superconducting coil conduction cooling method and device therefor |
| JP2012248726A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Superconductive coil and superconductive magnet |
| JP2012248730A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Superconductive coil and superconductive magnet |
| JP2012248731A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Superconductive coil and superconductive magnet |
| KR101345776B1 (en) | 2012-12-20 | 2013-12-27 | 한국기초과학지원연구원 | Initial cooling prediction system and method of superconducting magnet |
| JP2016018902A (en) * | 2014-07-09 | 2016-02-01 | 株式会社日立メディコ | Superconducting electromagnet device |
| JP2016211749A (en) * | 2015-04-28 | 2016-12-15 | 株式会社前川製作所 | Superconductor cooling device and cooling method |
| CN107579625A (en) * | 2017-08-14 | 2018-01-12 | 中国科学院长春光学精密机械与物理研究所 | Motor temperature regulating device for infrared band test system |
| CN109887701A (en) * | 2019-03-06 | 2019-06-14 | 上海交通大学 | A kind of superconducting magnet refrigerating mechanism and application method for levitated superconducting magnet train |
| JP2019207916A (en) * | 2018-05-28 | 2019-12-05 | 住友電気工業株式会社 | Superconducting coil body and superconducting device |
| CN110993247A (en) * | 2019-12-19 | 2020-04-10 | 中国科学院合肥物质科学研究院 | T-stage high-field superconducting magnet system for space-propelled ground simulation environment |
| JP2021175284A (en) * | 2020-04-27 | 2021-11-01 | 健吾 大倉 | Motor device |
-
2001
- 2001-01-09 JP JP2001001361A patent/JP2002208512A/en not_active Withdrawn
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005237060A (en) * | 2004-02-17 | 2005-09-02 | Sumitomo Electric Ind Ltd | Cooling system for superconductive motor |
| JP4501449B2 (en) * | 2004-02-17 | 2010-07-14 | 住友電気工業株式会社 | Cooling device for superconducting motor |
| JP2007321050A (en) * | 2006-05-31 | 2007-12-13 | Kyoto Univ | Cryogenic cold-storing medium, and cryogenic refrigeration method and cryogenic refrigeration system, using the same |
| EP1953772A2 (en) | 2007-02-05 | 2008-08-06 | Hitachi, Ltd. | Magnetic field generator |
| JP2008192848A (en) * | 2007-02-05 | 2008-08-21 | Hitachi Ltd | Magnetic-field generator |
| US7764153B2 (en) | 2007-02-05 | 2010-07-27 | Hitachi, Ltd. | Magnetic field generator |
| JP2008283803A (en) * | 2007-05-11 | 2008-11-20 | Railway Technical Res Inst | Superconducting magnet for magnetic-levitation railway vehicle |
| JP2008279917A (en) * | 2007-05-11 | 2008-11-20 | Railway Technical Res Inst | Operation system of super-conductive magnet for magnetically-suspended railway vehicle |
| JP2010262950A (en) * | 2009-04-29 | 2010-11-18 | Mitsubishi Electric Corp | Superconducting electromagnet and transport method therefor |
| JP2011035216A (en) * | 2009-08-04 | 2011-02-17 | Railway Technical Res Inst | Re-based superconducting coil conduction cooling method and device therefor |
| JP2012248731A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Superconductive coil and superconductive magnet |
| JP2012248730A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Superconductive coil and superconductive magnet |
| JP2012248726A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Superconductive coil and superconductive magnet |
| KR101345776B1 (en) | 2012-12-20 | 2013-12-27 | 한국기초과학지원연구원 | Initial cooling prediction system and method of superconducting magnet |
| WO2014098346A1 (en) * | 2012-12-20 | 2014-06-26 | 한국기초과학지원연구원 | System and method for predicting initial cooling of superconducting magnet |
| JP2016018902A (en) * | 2014-07-09 | 2016-02-01 | 株式会社日立メディコ | Superconducting electromagnet device |
| JP2016211749A (en) * | 2015-04-28 | 2016-12-15 | 株式会社前川製作所 | Superconductor cooling device and cooling method |
| CN107579625A (en) * | 2017-08-14 | 2018-01-12 | 中国科学院长春光学精密机械与物理研究所 | Motor temperature regulating device for infrared band test system |
| JP2019207916A (en) * | 2018-05-28 | 2019-12-05 | 住友電気工業株式会社 | Superconducting coil body and superconducting device |
| JP7151173B2 (en) | 2018-05-28 | 2022-10-12 | 住友電気工業株式会社 | Superconducting coil body and superconducting equipment |
| CN109887701A (en) * | 2019-03-06 | 2019-06-14 | 上海交通大学 | A kind of superconducting magnet refrigerating mechanism and application method for levitated superconducting magnet train |
| CN109887701B (en) * | 2019-03-06 | 2021-01-01 | 上海交通大学 | Superconducting magnet cooling device for superconducting magnetic suspension train and use method |
| CN110993247A (en) * | 2019-12-19 | 2020-04-10 | 中国科学院合肥物质科学研究院 | T-stage high-field superconducting magnet system for space-propelled ground simulation environment |
| CN110993247B (en) * | 2019-12-19 | 2021-11-19 | 中国科学院合肥物质科学研究院 | T-stage high-field superconducting magnet system for space-propelled ground simulation environment |
| JP2021175284A (en) * | 2020-04-27 | 2021-11-01 | 健吾 大倉 | Motor device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2002208512A (en) | High-temperature superconducting coil cooling method and cooling structure | |
| US7816826B2 (en) | Thermosyphon cooled superconductor | |
| JP5043955B2 (en) | Superconducting synchronous motor | |
| JP2006324325A (en) | Super-conducting magnet apparatus | |
| CA2210540A1 (en) | Cooling method and energizing method of superconductor | |
| JP4821047B2 (en) | High temperature superconducting coil cooling system | |
| JPH10275719A (en) | Method for cooling superconductor | |
| JP2010262950A (en) | Superconducting electromagnet and transport method therefor | |
| KR101888503B1 (en) | Power supply for conduction cooled superconducting equipment | |
| JP4799757B2 (en) | Superconducting magnet | |
| JP2004222494A (en) | Vacuum retention method and superconducting machine with vacuum retention | |
| JP2004111581A (en) | Superconducting magnet unit | |
| JP2010267661A (en) | Superconducting magnet device unit | |
| JP2952552B2 (en) | Current leads for superconducting equipment | |
| JPH11112043A (en) | Current lead for super conducting device | |
| JP3284406B2 (en) | Superconducting wire connecting device for cryogenic equipment | |
| JP2001126916A (en) | High-temperature superconducting coil and high- temperature superconducting magnet using the same | |
| JPH10247753A (en) | Superconducting device and control method thereof | |
| JP2607661Y2 (en) | Cryogenic container | |
| JP3450318B2 (en) | Thermoelectric cooling type power lead | |
| JP2000150224A (en) | Excitation control method of superconducting coil | |
| JP3382794B2 (en) | Permanent current switch | |
| JPH06275875A (en) | Conduction cooling-type superconducting electromagnet device | |
| JPH11329834A (en) | Superconducting device with conductor formed of superconducting material | |
| CN220306059U (en) | Pluggable nitrogen fixation cooling high-temperature superconducting magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20080401 |