WO2023170773A1 - Élément de positionnement, et aimant supraconducteur et procédé de fabrication d'aimant supraconducteur - Google Patents

Élément de positionnement, et aimant supraconducteur et procédé de fabrication d'aimant supraconducteur Download PDF

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Publication number
WO2023170773A1
WO2023170773A1 PCT/JP2022/009896 JP2022009896W WO2023170773A1 WO 2023170773 A1 WO2023170773 A1 WO 2023170773A1 JP 2022009896 W JP2022009896 W JP 2022009896W WO 2023170773 A1 WO2023170773 A1 WO 2023170773A1
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WO
WIPO (PCT)
Prior art keywords
pancake coil
stage
pancake
superconducting magnet
coil
Prior art date
Application number
PCT/JP2022/009896
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English (en)
Japanese (ja)
Inventor
英明 三浦
泰佑 服部
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/009896 priority Critical patent/WO2023170773A1/fr
Priority to JP2022536742A priority patent/JP7142811B1/ja
Publication of WO2023170773A1 publication Critical patent/WO2023170773A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor

Definitions

  • the present application relates to a positioning member used for positioning a pancake coil wound with a superconducting wire in a superconducting magnet device, a superconducting magnet using this positioning member, and a method for manufacturing a superconducting magnet.
  • the above-mentioned superconducting magnet Due to the structural characteristics of the oxide-based superconducting wire, the above-mentioned superconducting magnet has problems such as being susceptible to peeling stress, deteriorating the superconducting properties, and not being able to generate the desired magnetic field (for example, see Non-Patent Document 1) .
  • a superconducting device is known in which a plurality of pancake coils forming a superconducting magnet are fixed from the inner peripheral surface of the coil (for example, see Patent Document 1).
  • the present application has been made to solve the above-mentioned problems, and even if the inner diameter dimensions of the pancake coils composing a superconducting magnet are different, the displacement of the coils during excitation can be suppressed, and the characteristics of the superconducting wire can be improved.
  • the object of the present invention is to obtain a pancake coil positioning member that can prevent deterioration.
  • the positioning member disclosed in the present application is provided inside the pancake coil in order to adjust the position of the pancake coil around which the superconducting wire constituting the superconducting magnet placed on the stage is wound.
  • a positioning member disposed on the stage, the positioning member being brought into surface contact with the inner circumferential surface of the pancake coil and having a pressing mechanism for pressing the pancake coil in the radial direction;
  • the present invention is characterized in that the position of the pancake coil is adjusted so that the central axis of the pancake coil is aligned with a predetermined position on the stage.
  • the superconducting magnet disclosed in the present application is characterized in that a plurality of the pancake coils are stacked and manufactured using the positioning member.
  • the method for manufacturing a superconducting magnet disclosed in the present application includes a step of placing a pancake coil wound with a superconducting wire constituting the superconducting magnet on a stage, and using a distance meter provided on the stage to a step of measuring the distance between a predetermined position and the central axis of the pancake coil; and a step of bringing a plurality of positioning members provided on the stage and having a pressing mechanism into surface contact with the inner peripheral surface of the pancake coil. and radially pressing the pancake coil from the inner peripheral surface side by the pressing mechanism to align the central axis of the pancake coil to a predetermined position of the stage based on the distance. and a step of adjusting the position of the pancake coil.
  • the positioning member of the present application when manufacturing a superconducting magnet, by independently adjusting the pressure applied to the inner peripheral surface side of each pancake coil that constitutes the superconducting magnet, it is possible to adjust the inner diameter of each pancake coil. Even when the dimensions are different, the displacement of the pancake coil during excitation can be suppressed, and the deterioration of the superconducting properties of the superconducting wire of the superconducting magnet device can be prevented.
  • FIG. 1 is a schematic cross-sectional view showing the entire superconducting magnet device using the positioning member according to Embodiment 1.
  • FIG. FIG. 2 is a schematic perspective view showing a superconducting magnet portion in FIG. 1.
  • FIG. FIG. 2 is a schematic plan view showing the pancake coil and positioning member along line A-A' in FIG. 1.
  • FIG. FIG. 4 is a cross-sectional view showing the superconducting magnet and the positioning member taken along line B-B' in FIG. 3;
  • FIG. 7 is a schematic plan view showing the relationship between the pancake coil and the position of a distance meter according to Embodiment 2.
  • FIG. 7 is a diagram showing a flowchart of a method for manufacturing a superconducting magnet in Embodiment 3.
  • FIG. 1 is a schematic cross-sectional view showing the entire superconducting magnet device using the positioning member according to the first embodiment
  • FIG. 2 is a schematic perspective view showing the superconducting magnet portion shown in FIG. 3 is a schematic plan view showing the pancake coil and the positioning member along the line AA' in FIG. 1
  • FIG. 4 is a schematic plan view showing the superconducting magnet and the positioning member along the line BB' in FIG. It is a sectional view showing an extension member.
  • the superconducting magnet device 10 includes a pancake coil 2 , a superconducting magnet 1 made up of a plurality of stacked pancake coils 2 , a stage 9 on which the superconducting magnet 1 is placed, and a stage 9 arranged on the stage 9 and containing the pancake coils 2 .
  • a positioning member 3 that performs positioning, a refrigerator 6 that cools the superconducting magnet 1, a radiation shield tank 7 that shields the thermal radiation of the superconducting magnet 1, and a cryostat 8 that houses the superconducting magnet 1 and maintains a low temperature. , is equipped with.
  • a refrigerator 6 is attached to the lower part of the cryostat 8, and the refrigerator 6 includes a first cooling section 61 and a second cooling section 62.
  • the first cooling section 61 is , several tens of K
  • the second cooling section 62 is cooled to a temperature of several K.
  • the first cooling unit 61 is thermally connected to the radiation shield tank 7 .
  • the second cooling unit 62 is thermally connected to the stage 9, and cools the superconducting magnet 1 via it.
  • the stage 9 on which the superconducting magnet 1 is placed is preferably made of a good thermal conductor such as oxygen-free copper or high-purity aluminum.
  • lead wires for supplying current and measurement wires for sensors that measure voltage and temperature are installed. Note that the inside of the cryostat 8 is maintained in a vacuum state in order to reduce the intrusion of heat from the outside air.
  • FIG. 2 is a schematic perspective view showing the superconducting magnet 1 and the positioning member 3
  • FIG. 3 is a schematic plan view showing the pancake coil 2 and the positioning member 3 along line AA' in FIG. be.
  • a plurality of positioning members 3 are arranged along the inner peripheral surface of the pancake coil 2 around which the superconducting wire is wound.
  • the pancake coil 2 is adjusted and fixed so that its central axis 5 is located at a predetermined position 4 on the stage 9.
  • FIG. 3 shows the state before the position of the central axis 5 of the pancake coil 2 is adjusted to a predetermined position 4 on the stage 9. 2 and 3, the case is shown in which the number of positioning members 3 is three, and by adjusting the pressure applied to the pancake coil 2 by each positioning member 3, the pancake The position of the coil 2 is uniquely determined and fixed. Note that although the above figure shows a case where the number of positioning members 3 is three, it may be any other number. Further, although FIGS. 2 and 3 of this embodiment show an example in which the stage 9 has a disk shape, it may have another shape.
  • FIG. 4 is a cross-sectional view taken along line B-B' in FIG. 3.
  • the first pancake coil 21 and the second pancake coil 22 constitute a coil unit, and the superconducting magnet 1 is constituted by stacking the coil units in multiple stages. Insulating paper 23 is inserted between the coil units for electrical insulation.
  • the first pancake coil 21 is pressed radially from the inner peripheral surface side by the first pressing member 31 and the holding member 33, and the central axis 51 of the first pancake coil 21 is set in advance on the stage 9.
  • the stage 9 is then fixed to the stage 9.
  • the second pancake coil 22 is pressed radially from the inner peripheral surface side by the second pressing member 32 and the holding member 33, so that the central axis 52 of the second pancake coil 22 is placed on the stage.
  • the stage 9 is adjusted to a predetermined position 4 and fixed to the stage 9.
  • the first pressing member 31 includes a first contact member 311 and a first pressing member 312, and the second pressing member 32 includes a second contact member 321 and a second pressing member 312. and a pressing member 322.
  • the first contact member 311 maintains good contact with the inner circumferential surface of the first pancake coil 21, and similarly, the second contact member 321
  • the cross section of the surface of each positioning member 3 that comes into contact with the pancake coil 2 is semi-cylindrical.
  • any structure may be used as long as it is a mechanism that can press the first pancake coil 21 and the second pancake coil 22 in the radial direction from the inner peripheral surfaces thereof.
  • the holding member 33 has a hole (female thread) in which a spiral groove is formed, and the spiral groove of the first pressing member 312 and the spiral groove of the holding member 33 are in a screw-fitting relationship with each other.
  • the first pancake coil 21 is positioned by rotating the first pressing member 312 to press the first pancake coil 21 via the first contact member 311. This is done by adjusting the center axis 51 to be at a predetermined position 4 on the stage 9. By performing the above-mentioned operations on each of the three positioning members 3, the first pancake coil 21 is finally positioned and fixed. The same applies to the connection between the second pressing member 322 and the holding member 33.
  • first pressing member 312 and the second pressing member 322 have a tail portion on the opposite side from the first contact member 311 and the first contact member 321 for rotating in accordance with the shape of the tip of the driver.
  • a slotted groove, a Phillips groove, or a hexagonal hole for a hexagonal wrench are provided as required.
  • the positioning member 3 may perform only positioning adjustment, and fixation may be performed using another member.
  • the thermal contraction rate of the positioning member 3 is preferably smaller than the thermal contraction rate of the first pancake coil 21 and the second pancake coil 22 during cooling. Further, the first pancake coil 21 and the second pancake coil 22 are electrically connected by a superconducting wire or a copper wire.
  • the material constituting the positioning member 3 may be any non-magnetic material, and any material may be used as long as it satisfies the above conditions.
  • the inner surface side portion of each pancake coil and the contact member of the positioning member are in close contact with each other, so that, for example, Even in an environment where electromagnetic force during excitation or thermal stress during cooling is applied, displacement of each of the first pancake coil and the second pancake coil can be suppressed. Thereby, it is possible to suppress mechanical stress from being applied to the connection portion where the first pancake coil and the second pancake coil are electrically connected.
  • the positioning member includes a mechanism for pressing the pancake coil in the radial direction from the inner peripheral surface of the coil, and is capable of adjusting the position in the horizontal direction of the plane of the drawing in FIG.
  • This mechanism allows the predetermined position of the stage to coincide with the center axis of each pancake coil. Therefore, according to this structure, it is possible to provide a superconducting magnet in which the superconducting properties do not deteriorate and the difference between the designed magnetic field and the actually formed magnetic field is small.
  • the positioning member of the pancake coil allows the inside of each of the pancake coils constituting the superconducting magnet to be adjusted.
  • the displacement of the pancake coils during excitation can be suppressed even if the inner diameter dimensions of the individual pancake coils are different, and the superconductivity of the superconducting wire can be suppressed. This has the remarkable effect of making it possible to suppress deterioration of characteristics.
  • FIG. 5 is a schematic plan view showing the relationship between the pancake coil and the distance meter that constitute the superconducting magnet according to the second embodiment. Components other than the distance meter 11 are the same as those in FIG. 3 of Embodiment 1, so description thereof will be omitted. Note that in FIG. 5, the positioning member 3 is omitted.
  • the distance is measured using a distance meter 11 installed at The distance meter 11 measures the distance between a predetermined position 4 of the stage 9 and the inner peripheral surface of the pancake coil 2, and specifies the position of the central axis 5 of the pancake coil 2.
  • the central axis 5 of the pancake coil 2 is aligned with the predetermined position of the stage 9.
  • the position of the pancake coil 2 is adjusted and fixed by a positioning member 3 provided on the stage 9.
  • non-contact measurement using a laser displacement meter is desirable, for example.
  • a method may be adopted in which the distance from the predetermined position 4 of the stage 9 to the inner circumferential surface of the pancake coil 2 is directly measured with a ruler.
  • the distance meter 11 is installed on the predetermined position 4 of the stage 9 has been explained, but even when it is installed at a place other than the predetermined position 4 on the stage 9, it can be set in advance. If the relationship between the position of the installed distance meter 11 and the predetermined position 4 of the stage 9 is known, it is possible to measure the distance by correcting it.
  • the position of the center axis of the pancake coil is accurately calculated using the distance meter, and the positioning member is used to accurately calculate the position of the center axis of the pancake coil.
  • FIG. 6 is a diagram showing a flowchart for explaining a method for manufacturing a superconducting magnet according to Embodiment 3.
  • the superconducting magnet device 10 and its configuration are the same as those in Embodiment 1, so a description thereof will be omitted.
  • a method for manufacturing the superconducting magnet 1 will be described using a flowchart with reference to FIGS. 1 to 5.
  • the pancake coil 2 is composed of a unit of a first pancake coil 21 and a second pancake coil 22.
  • step S01 the first pancake coil 21 is placed on the stage 9.
  • step S02 the distance between the central axis 5 of the pancake coil 21 obtained from the inner peripheral surface of the first pancake coil 21 and the predetermined position 4 of the stage 9 is determined in advance on the stage 9. Measurement is performed using a laser displacement meter placed at the specified position.
  • step S03 the central axis 5 of the first pancake coil 21 is aligned with the predetermined position 4 of the stage 9.
  • step S04 the positioning member 3 is used to align the center axis of the first pancake coil 21 with the predetermined position 4 of the stage, and then move the first pancake coil 21 inside.
  • the position of the first pancake coil 21 is adjusted and fixed by pressing in the radial direction from the circumferential surface side.
  • the second pancake coil 22 is placed on the stage 9, similar to the process of step S01 for the first pancake coil 21.
  • an insulating paper 23 is inserted between the first pancake coil 21 and the second pancake coil 22. You may.
  • a good thermal conductor such as oxygenated copper or high-purity aluminum, grease, or resin.
  • step S05 the second pancake coil 22 is stacked and placed on the first pancake coil 21.
  • step S06 the distance between the central axis 5 of the pancake coil 21 obtained from the inner peripheral surface of the first pancake coil 21 and the predetermined position 4 of the stage 9 is determined in advance on the stage 9. Measurement is performed using a laser displacement meter placed at the specified position.
  • step S07 the central axis 5 of the first pancake coil 21 is aligned with the predetermined position 4 of the stage 9.
  • the second pancake coil 22 is moved using the positioning member 3 with the center axis 52 of the second pancake coil 22 aligned with the predetermined position 4 of the stage.
  • the position of the second pancake coil 22 is adjusted and fixed by pressing in the radial direction from the inner peripheral surface side.
  • first pancake coil 21 and the second pancake coil 22 in FIG. It is desirable to provide a connection part for making a connection.
  • the pancake coil 21 is installed on the stage 9, but the presence or absence of the stage 9 is not necessarily concerned. Further, as described in the second embodiment, the case where a laser displacement meter is used for distance measurement has been described, but other methods may be used. In addition, while the positioning member 3 is used to adjust the position of the first pancake coil 21, it is also fixed. However, as described in the second embodiment, the final position of the first pancake coil 21 is The fixation may be performed by another member or means. The same applies to the second pancake coil 22.
  • each pancake coil is in contact with the positioning member and fixed, the displacement of the pancake coil during excitation and cooling It is possible to suppress the deterioration of the superconducting properties of the superconducting wire, and it is also possible to match the center axis of each pancake coil, so the difference between the actual magnetic field and the design magnetic field is small. It has the remarkable effect of being able to provide magnets.
  • the superconducting magnet device manufactured using the positioning member according to the embodiment described above has been described using a plurality of embodiments as examples. Furthermore, in the above embodiments, the superconducting wire constituting the superconducting magnet is explained using an oxide-based superconducting wire having a high aspect ratio as an example, but the superconducting wire is not limited to the oxide-based superconducting wire. do not have.
  • 1 superconducting magnet 2 pancake coil, 21 first pancake coil, 22 second pancake coil, 3 positioning member, 31 first pressing member, 32 second pressing member, 33 holding member, 311th 1 contact member, 312 first pressing member, 321 second contact member, 322 second pressing member, 4 predetermined stage position, 5 central axis of pancake coil, 51 first pancake coil , 52 Central axis of the second pancake coil, 6 Refrigerator, 7 Radiation shield tank, 8 Cryostat, 9 Stage, 10 Superconducting magnet device, 11 Distance meter, 23 Insulating paper, 61 First cooling section, 62 Second cooling section.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)

Abstract

Selon l'invention, Afin de régler les positions de bobines de galette (2) qui sont placées sur un étage (9) et dans lesquelles des fils supraconducteurs constituant des aimants supraconducteurs (1) sont enroulés, des éléments de positionnement (3) sont disposés à l'intérieur des bobines de galette (2) et comprennent des mécanismes de pression (31) qui sont amenés en contact de surface avec les surfaces circonférentielles internes des bobines de galette et qui pressent les surfaces dans une direction radiale. Les positions des bobines de galette (2) sont ajustées au moyen des mécanismes de pression (31) de telle sorte que les axes centraux (5) des bobines de galette (2) sont alignés avec une position prédéfinie (4) de l'étage (9). Ceci permet, même lorsque les diamètres internes des bobines de galette (2) sont différents l'un de l'autre, de supprimer le déplacement des bobines de galette (2) qui sont excitées, et de supprimer la dégradation de caractéristiques supraconductrices de fils supraconducteurs.
PCT/JP2022/009896 2022-03-08 2022-03-08 Élément de positionnement, et aimant supraconducteur et procédé de fabrication d'aimant supraconducteur WO2023170773A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2022/009896 WO2023170773A1 (fr) 2022-03-08 2022-03-08 Élément de positionnement, et aimant supraconducteur et procédé de fabrication d'aimant supraconducteur
JP2022536742A JP7142811B1 (ja) 2022-03-08 2022-03-08 位置出し部材並びに超電導マグネット及び超電導マグネットの製造方法

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PCT/JP2022/009896 WO2023170773A1 (fr) 2022-03-08 2022-03-08 Élément de positionnement, et aimant supraconducteur et procédé de fabrication d'aimant supraconducteur

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057194A (fr) * 1973-09-17 1975-05-19
JPS6173308A (ja) * 1984-09-18 1986-04-15 Fujikura Ltd 超電導磁石
WO2016092882A1 (fr) * 2014-12-09 2016-06-16 三菱電機株式会社 Élément de positionnement de bobines en double galette, procédé de fabrication de dispositif à aimant supraconducteur, et dispositif à aimant supraconducteur
JP2018200954A (ja) * 2017-05-26 2018-12-20 住友電気工業株式会社 超電導コイル装置、超電導マグネット及び超電導機器
JP2019207916A (ja) * 2018-05-28 2019-12-05 住友電気工業株式会社 超電導コイル体および超電導機器
JP2019207917A (ja) * 2018-05-28 2019-12-05 住友電気工業株式会社 超電導コイル体、超電導コイル集合体および超電導機器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102165164B (zh) 2008-12-17 2014-02-26 爱信精机株式会社 进气歧管
JP6173308B2 (ja) 2011-07-06 2017-08-02 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ （メタ）アクリル酸エステルの製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057194A (fr) * 1973-09-17 1975-05-19
JPS6173308A (ja) * 1984-09-18 1986-04-15 Fujikura Ltd 超電導磁石
WO2016092882A1 (fr) * 2014-12-09 2016-06-16 三菱電機株式会社 Élément de positionnement de bobines en double galette, procédé de fabrication de dispositif à aimant supraconducteur, et dispositif à aimant supraconducteur
JP2018200954A (ja) * 2017-05-26 2018-12-20 住友電気工業株式会社 超電導コイル装置、超電導マグネット及び超電導機器
JP2019207916A (ja) * 2018-05-28 2019-12-05 住友電気工業株式会社 超電導コイル体および超電導機器
JP2019207917A (ja) * 2018-05-28 2019-12-05 住友電気工業株式会社 超電導コイル体、超電導コイル集合体および超電導機器

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JPWO2023170773A1 (fr) 2023-09-14

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