WO2024232030A1 - 高温超電導線及び超電導コイル - Google Patents

高温超電導線及び超電導コイル Download PDF

Info

Publication number
WO2024232030A1
WO2024232030A1 PCT/JP2023/017512 JP2023017512W WO2024232030A1 WO 2024232030 A1 WO2024232030 A1 WO 2024232030A1 JP 2023017512 W JP2023017512 W JP 2023017512W WO 2024232030 A1 WO2024232030 A1 WO 2024232030A1
Authority
WO
WIPO (PCT)
Prior art keywords
superconducting
temperature superconducting
layer
superconducting wire
insulating
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.)
Ceased
Application number
PCT/JP2023/017512
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
泰佑 服部
英明 三浦
俊 殿岡
正義 大屋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Kwansei Gakuin Educational Foundation
Original Assignee
Mitsubishi Electric Corp
Kwansei Gakuin Educational Foundation
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.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Kwansei Gakuin Educational Foundation filed Critical Mitsubishi Electric Corp
Priority to JP2023555747A priority Critical patent/JP7471534B1/ja
Priority to PCT/JP2023/017512 priority patent/WO2024232030A1/ja
Publication of WO2024232030A1 publication Critical patent/WO2024232030A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Definitions

  • This application relates to high-temperature superconducting wires and superconducting coils.
  • a conventional high-temperature superconducting wire or a superconducting coil made of a high-temperature superconducting wire one of the entire outer surface and the entire inner surface of an insulating coating layer covering the outer surface of a tape-shaped substrate constituting the wire material of the superconducting wire and a superconducting laminate having an intermediate layer, an oxide superconducting layer, and a metal stabilizing layer laminated on the substrate is covered with a coating layer made of a fluororesin.
  • the insulating coating layer is formed by winding an insulating tape covered with this coating layer around the superconducting laminate. Furthermore, at least one sheet of the insulating tape is wound so as to cover the entire outer surface of the superconducting laminate.
  • the high temperature superconducting wire has a rectangular flat plate shape as a whole, and a thickness Lt of 0.17 mm, which is sufficiently small compared to a width Lw of, for example, 4 mm.
  • a superconducting laminate 2 is laminated on a base material 1 (hereinafter also referred to as substrate 1), and the outer periphery of this substrate 1 and superconducting laminate 2 is covered with a stabilizing member made of a copper-plated material or the like.
  • This stabilizing member is further covered with two types (two sheets) of insulating tapes, which are insulating covering layers, via an insulating member layer 3.
  • Both types (two sheets) of insulating covering layers are made of polyimide insulating tapes (these insulating tapes are also referred to as fixing member 4 and outer fixing member 5, hereinafter), and at least one of them is covered with a coating layer made of fluororesin. This is to prevent peeling, because, as mentioned above, the high-temperature superconducting wire has a wide tape shape and is vulnerable to stress (peeling stress) in the y direction (the normal direction of the rectangular flat surface) perpendicular to the x direction in Fig.
  • the insulating tapes is coated with fluororesin so that even if the resin, which is an adhesive for fixing the insulating tape to the high-temperature superconducting wire, adheres to the superconducting wire, the adhered resin can be easily peeled off from the superconducting wire (because adhesion of the resin leads to deterioration of the superconducting wire).
  • conventional high-temperature superconducting coils using oxide high-temperature superconducting wires are made by winding tape-shaped high-temperature superconducting wire with an oxide superconducting layer formed on the surface of a metal substrate, forming a pancake-shaped coil with a space passing through the axial center by winding this high-temperature superconducting wire. At least a portion of the side portions of the winding that form a pair of axial end faces is covered with a resin layer, and the high-temperature superconducting wire and tape are wound together to reduce the peeling stress acting on the superconducting layer, producing a coil that is less prone to deterioration (see, for example, Patent Document 2).
  • a fluorine-coated insulating layer is wound around the wide wire so that even if resin adheres to the superconducting layer when the wire is coiled and fixed, the adhered resin can be easily peeled off from the superconducting layer.
  • a wrap winding method is used in which the coating tape is partially overlapped while winding to prevent the resin from entering through gaps during winding.
  • a coil formed by winding insulating tape around a superconducting wire is fixed with a resin layer having a heat transfer member which also serves as a heat transfer path, thereby maintaining the coil shape.
  • lap winding has the drawback that the distance between the superconducting wires increases, lowering the current density of the coil.
  • lap winding also causes the distance between the wires to become uneven, which can become a new source of peeling stress.
  • the resin layer requires a heat transfer material that is not necessarily required with lap winding.
  • the present application discloses technology for solving the above problems, and aims to provide a superconducting wire and a superconducting coil made of this superconducting wire that can reduce the distance between superconducting wires, ensure the required coil current density, and keep the distance between superconducting wires constant, thereby preventing the occurrence of new peeling stress sources.
  • the high temperature superconducting wire disclosed in the present application is A substrate formed in a flat plate shape; a superconducting laminate member disposed on the substrate and having a superconducting layer laminated thereon via an intermediate layer; a metal-plated stabilizing member disposed on the superconducting laminate; an insulating member layer that has been subjected to a release treatment for resin and covers the outer periphery of a laminated structure in which the substrate, the superconducting laminate, and the stabilizing member are laminated together; a tape-shaped fixing member that is wound around the insulating member layer so as to cover the outer periphery of the insulating member layer and fixes the insulating member layer to the superconducting laminate; It is equipped with the following:
  • the high-temperature superconducting wire disclosed in this application makes it possible to reduce the distance between superconducting wires, ensure the required coil current density, and keep the distance between the superconducting wires constant, thereby making it possible to provide a superconducting wire that can prevent the occurrence of new peeling stress sources, and a superconducting coil made of this superconducting wire.
  • FIG. 1 is a perspective view showing an example of the structure of a high-temperature superconducting wire for explaining the problem of the present application.
  • 1 is a perspective view for explaining a structural example of a high-temperature superconducting wire according to a first embodiment.
  • FIG. 1 is a top view for explaining a structural example of a high-temperature superconducting wire according to a first embodiment.
  • FIG. 2 is a diagram for explaining a laminated structure of a superconducting layer of the high-temperature superconducting wire according to the first embodiment.
  • FIG. FIG. 2 is a perspective view showing an example of a high-temperature superconducting wire with gap winding according to the first embodiment.
  • FIG. 4 is a perspective view showing another example of a high-temperature superconducting wire with gap winding according to the first embodiment.
  • 1 is a perspective view for explaining a superconducting coil formed from a high-temperature superconducting wire according to a first embodiment.
  • FIG. 2 is a top view for explaining an example of a partial structure of a superconducting coil according to the first embodiment.
  • FIG. 9 is a diagram showing a comparative example of a partial structure of the superconducting coil of FIG. 8 .
  • 10 is a top view for explaining another example of a partial structure of the superconducting coil according to the first embodiment.
  • FIG. 4 is a top view for explaining another example of a partial structure of the superconducting coil according to the first embodiment.
  • FIG. 11 is a perspective view for explaining one example of the structure of a high-temperature superconducting wire according to a second embodiment.
  • FIG. 11 is a top view for explaining one example of a structure of a high-temperature superconducting wire according to a second embodiment.
  • FIG. 11 is a top view for explaining another example of the structure of the high-temperature superconducting wire according to the second embodiment.
  • Fig. 2 is a diagram for explaining an example of the configuration of the high temperature superconducting wire 100 according to the first embodiment.
  • the high temperature superconducting wire 100 according to the first embodiment will be described in detail below with reference to Fig. 2.
  • the fixing member 4 covering the outer periphery of the insulating member layer 3, which is a rectangular cylindrical body is of one type (one sheet) and does not need to be coated with fluororesin.
  • only one fixing member is required, and both of the above-mentioned two types of fixing members (fixing member 4 and outer fixing member 5) are not required.
  • the high temperature superconducting wire 100 is generally flat, and is arranged inside (the space within) the cylindrical portion of a rectangular stabilizing member 6 (formed, for example, by copper plating) by integrating and laminating a flat substrate 1, a superconducting laminate member 2 having a superconducting layer and an intermediate layer laminated on top of the substrate 1, and an insulating member layer 3 which has been subjected to a release treatment against resin by fluorine processing (hereinafter also referred to as a laminated structure).
  • a rectangular stabilizing member 6 formed, for example, by copper plating
  • a tape-like fixing member 4 such as an insulating tape (e.g., made of polyimide) is wound around the outer periphery of the insulating member layer 3 with a certain gap (see FIG. 2) in between (hereinafter, this winding method with a gap is simply called gap winding.)
  • the gap is formed in the width direction of the insulating tape, and the size of the gap is set to, for example, zero (no gap) or a very small size of about 5% of the insulating tape width.
  • Fig. 3 is a top view of the high temperature superconducting wire 100 according to embodiment 1. That is, Fig. 3 is a view of the high temperature superconducting wire 100 according to embodiment 1 as viewed from above (as viewed in the direction of arrow A in Fig. 2).
  • a substrate 1 e.g., 75 ⁇ m thick
  • a stabilizing member 6 is arranged in this order from the bottom.
  • the high-temperature superconducting wire 100 By configuring the high-temperature superconducting wire 100 as described above, it is possible to suppress the stress (peel stress) applied to the insulating tape in the y direction in Figure 2 (the normal direction of the rectangular surface marked with the symbol 3 of the high-temperature superconducting wire), which is a direction perpendicular to the x direction, which is the longitudinal direction of the high-temperature superconducting wire, and ultimately to prevent the insulating member layer 3 from peeling off from the superconducting laminate member 2.
  • the release effect can prevent the adhesive from remaining attached to the superconducting laminate (because it will peel off due to the release effect), thereby preventing performance degradation of the superconducting layer due to adhesive penetration.
  • the insulating tape covering the outer periphery of the high temperature superconducting wire 100 is wound so that adjacent windings do not overlap each other (this structure will be described in detail later).
  • FIG. 4 is a three-dimensional schematic diagram for explaining the detailed structure of the superconducting laminate 2.
  • the superconducting laminate 2 is sandwiched between the substrate 1 and the stabilizing member 6, and is composed of an intermediate layer 22 laminated on the substrate 1 side and a superconducting layer 21 laminated on the stabilizing member 6 side.
  • the laminated structure in which the substrate 1, the superconducting laminate 2, and the stabilizing member 6 are laminated is covered on all sides with a rectangular tubular insulating member layer 3, and this insulating member layer 3 is further covered on its outer periphery with a rectangular tubular fixing member 4.
  • an oxide superconducting member is used as the superconducting layer 21.
  • the effect of using the above-mentioned high-temperature superconducting wire 100 as the wire material for a superconducting coil will be described below.
  • the insulating member layer 3 is fluorine-treated, and the stabilizing member 6 is arranged parallel to the superconducting laminate member 2 without being wound around it. Therefore, when the wire is coiled and fixed, the adhesive resin does not reach the superconducting layer 21, and the adhesive resin does not come into direct contact with the superconducting layer 21.
  • the tape-shaped fixing member 4 here, for example, insulating tape
  • the fixing member which is an insulator that covers the outer periphery of the high-temperature superconducting wire 100, so that the distance between the superconducting wires (superconducting layers) does not become large.
  • the required current density can be ensured in the superconducting coil using the high-temperature superconducting wire 100.
  • FIG. 5 shows a perspective view of the structure of a high-temperature superconducting wire 101, which is an example of a high-temperature superconducting wire with gap winding according to the first embodiment.
  • the high-temperature superconducting wire 101 will be described below, focusing on the differences from the above-mentioned high-temperature superconducting wire 100.
  • the high-temperature superconducting wire 101 has a structure similar to that of the high-temperature superconducting wire 100, but the winding form (wound state) of the tape-shaped fixing member arranged on the outer periphery of the insulating member layer 3 is different. That is, the fixing member 4a of the high-temperature superconducting wire 101 is similar to the fixing member 4 of the high-temperature superconducting wire 100 in that it is a gap winding with a gap (the size of the gap is wg. See FIG.
  • the gap is larger than the width wt of the fixing member 4a, that is, it is wound around the outer periphery of the insulating member layer 3 under the relationship wg ⁇ wt.
  • the size of the gap is the size in the width direction of the fixing member.
  • the angle ⁇ shown in FIG. 5 is defined as the angle between the line connecting the multiple bases around which the fixing member is wound and the longitudinal direction of the wound portion of one fixing member, and is, for example, a value between 60 degrees and 90 degrees.
  • FIG. 6 shows in perspective view the structure of a high-temperature superconducting wire 102, which is another example of the high-temperature superconducting wire with gap winding according to embodiment 1.
  • this high-temperature superconducting wire 102 has a structure substantially similar to that of the high-temperature superconducting wire 100, but the winding form (wound state) of the tape-shaped fixing member 4b disposed on the outer periphery of the insulating member layer 3 is different.
  • the difference from the high temperature superconducting wire 101 is that the (left and right) positional relationship between the winding position of the tape-shaped fixing member 4b and the gap position is reversed from that of the above-mentioned high temperature superconducting wire 101.
  • the lower portion surrounded by the two-dot chain line corresponds to the high-temperature superconducting wire 101
  • the upper portion surrounded by the two-dot chain line corresponds to the high-temperature superconducting wire 102 .
  • Ls1 in the figure indicates the distance between the fixing members of two adjacent high temperature superconducting wires 101, 102 facing each other.
  • the relationship between the gap wg of the fixing members and the width wt of the fixing members is wt>wg.
  • FIG. 9 shows a (similar) top view of a pair of high-temperature superconducting wires in the prior art (see FIG. 1), i.e., a pair of high-temperature superconducting wires 301 and 302.
  • the distance between the portions where the insulating tapes of the two adjacent high temperature superconducting wires 301, 302 face each other is represented by Ls3 shown in the figure. If it is assumed here that the thickness of the fixing members for the high temperature superconducting wires 101, 102 is equal to the thickness of the high temperature superconducting wires 301, 302, it is found that the size of Ls3 is twice the size of the above Ls1.
  • the distance between the superconducting layers of the high-temperature superconducting wires 101 and 102 can be made smaller than the distance between the superconducting layers of the high-temperature superconducting wires 301 and 302 by Ls1, which is the difference between Ls3 and Ls1.
  • the distance between the portions where the fixing members of the two adjacent high-temperature superconducting wires 101, 102 face each other is Ls2 (see FIG. 10).
  • Ls2 is equal to the thickness of the fixing members, so the distance between the superconducting layers in superconducting coil 200b can be made even smaller than the distance between the superconducting layers in superconducting coil 200a. As a result, it can be seen that the required current density is even easier to obtain compared to the case shown in FIG. 8.
  • FIG. 8 a superconducting coil using a combination of two different high-temperature superconducting wires 101, 102 as adjacent high-temperature superconducting wires has been described. However, this is not limited to the above. Even with a superconducting coil 200c (see FIG. 11) using a combination of two high-temperature superconducting wires 101 of the same type, the distance between the portions where the fixing members of the two adjacent high-temperature superconducting wires 101 face each other is Ls1, just like in FIG. 8, and therefore the same effect as the superconducting coil 200a in FIG. 8 can be achieved.
  • the gap wg of the fixing member is equal to the width wt of the fixing member, but this is not limited thereto.
  • the fixing member e.g., insulating tape
  • the fixing member can be wound with a gap equal to or greater than the width wt of the fixing member (in this case, wg>wt), and by adjusting the winding position of the fixing member so that the fixing member does not overlap when forming a superconducting coil, the distance between the superconducting layers can be reduced when the superconducting coil is formed.
  • such a superconducting coil also has the same effect as the superconducting coil described in FIG. 8.
  • An example of a stator that satisfies such conditions is a filament that is sufficiently thin compared to the thickness Ht of the superconducting laminated member (see Figure 3). Specifically, for example, the maximum diameter of the filament is Td, and 10Td ⁇ Ht.
  • Embodiment 2 The high temperature superconducting wire 103 of the second embodiment will be described in detail below with reference to the drawings, focusing on the differences from the high temperature superconducting wire of the first embodiment.
  • FIG. 12 is a perspective view for explaining a high temperature superconducting wire 103 according to the second embodiment.
  • the high temperature superconducting wire 103 of the second embodiment is most different from the high temperature superconducting wire of the first embodiment in that it does not have a fixing member made of insulating tape, which is provided in the high temperature superconducting wire of the first embodiment.
  • the stabilizing member 6 is fixed by adhesion from the beginning in parallel with the superconducting laminate 2, so that the insulation treatment for the high temperature superconducting wire can be performed reliably. In other words, it is the same as when the gap is set to 100% in the above-mentioned gap winding.
  • the rectangular tubular insulating member layer 3 of the high temperature superconducting wire 103 of the second embodiment contains, inside thereof, not only the superconducting laminations 2 and the stabilizing members 6, but also an adhesive 7 (adhesive layer 7) for bonding the superconducting laminations 2 and the stabilizing members 6 (see FIG. 13).
  • the superconducting coil formed by winding the high temperature superconducting wire 103 of the second embodiment also exerts the same effects as the superconducting coil of the first embodiment.
  • the outer portion of the insulating member layer is subjected to a release treatment, because the release treatment is necessary to prevent the insulating member layer itself from bonding to the adjacent superconducting wire when it is coiled.
  • the high-temperature superconducting wire 104 of the second embodiment is configured such that the surface of the stabilizing member 6 facing the superconducting laminate member 2 is made of adhesive insulating tape 8 (also called adhesive insulating tape 8) instead of the above-mentioned adhesive (see FIG. 14).
  • adhesive insulating tape 8 also called adhesive insulating tape 8
  • a fixing member is used as the high-temperature superconducting wire, but the present invention is not limited to this, and in order to ensure that the insulation treatment for the high-temperature superconducting wire is performed, the insulating member layer 3 may be fixed to the superconducting layer from the beginning. This can also be said to be the case where the gap between the windings of the insulating tape is set to 100% in the above description.

Landscapes

  • Superconductors And Manufacturing Methods Therefor (AREA)
PCT/JP2023/017512 2023-05-10 2023-05-10 高温超電導線及び超電導コイル Ceased WO2024232030A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023555747A JP7471534B1 (ja) 2023-05-10 2023-05-10 高温超電導線及び超電導コイル
PCT/JP2023/017512 WO2024232030A1 (ja) 2023-05-10 2023-05-10 高温超電導線及び超電導コイル

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/017512 WO2024232030A1 (ja) 2023-05-10 2023-05-10 高温超電導線及び超電導コイル

Publications (1)

Publication Number Publication Date
WO2024232030A1 true WO2024232030A1 (ja) 2024-11-14

Family

ID=90716073

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/017512 Ceased WO2024232030A1 (ja) 2023-05-10 2023-05-10 高温超電導線及び超電導コイル

Country Status (2)

Country Link
JP (1) JP7471534B1 (https=)
WO (1) WO2024232030A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014241384A (ja) * 2013-06-12 2014-12-25 中部電力株式会社 超電導パンケーキコイル装置及びその製造方法
JP2016136623A (ja) * 2015-01-16 2016-07-28 住友電気工業株式会社 超電導コイルおよび超電導線材
JP2022174411A (ja) * 2021-05-11 2022-11-24 株式会社東芝 超電導コイルおよび超電導コイルの製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5417164B2 (ja) * 2009-12-28 2014-02-12 株式会社フジクラ 超電導線材の修復方法及び修復構造を有する超電導線材
WO2011129325A1 (ja) * 2010-04-16 2011-10-20 株式会社フジクラ 超電導コイル及びその製造方法
WO2020067335A1 (ja) * 2018-09-28 2020-04-02 株式会社フジクラ 酸化物超電導コイルおよびその製造方法
JP2021061135A (ja) * 2019-10-04 2021-04-15 株式会社フジクラ 酸化物超電導線材、超電導コイルおよび超電導コイルの製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014241384A (ja) * 2013-06-12 2014-12-25 中部電力株式会社 超電導パンケーキコイル装置及びその製造方法
JP2016136623A (ja) * 2015-01-16 2016-07-28 住友電気工業株式会社 超電導コイルおよび超電導線材
JP2022174411A (ja) * 2021-05-11 2022-11-24 株式会社東芝 超電導コイルおよび超電導コイルの製造方法

Also Published As

Publication number Publication date
JP7471534B1 (ja) 2024-04-19
JPWO2024232030A1 (https=) 2024-11-14

Similar Documents

Publication Publication Date Title
JP5123604B2 (ja) 超電導コイル
JP6486817B2 (ja) 超電導コイルおよび超電導コイル装置
JPH0653052A (ja) ライントランス
JP6180729B2 (ja) 超電導コイルおよびその製造方法
JP6567451B2 (ja) 超電導コイルと超電導コイルの製造方法
JP5534712B2 (ja) 高温超電導パンケーキコイルおよび高温超電導コイル
JP3622459B2 (ja) 電磁装置
JP6548916B2 (ja) 高温超電導コイル
US20230137323A1 (en) Coil component
JP7471534B1 (ja) 高温超電導線及び超電導コイル
US11538624B2 (en) Wire wound inductor and manufacturing method thereof
JP6005428B2 (ja) 超電導コイル及び超電導コイル装置
JP5710312B2 (ja) 超電導コイル装置
JP7441647B2 (ja) コイルユニットのコイル構造及びトランス
JP7830230B2 (ja) 高温超電導コイル及び高温超電導コイル装置
JP2025145269A (ja) 超電導線材、超電導線材の製造方法、超電導コイルおよびコイル装置
JP2021039978A (ja) 高温超電導コイル
JP2011233294A (ja) 絶縁被覆超電導線及び絶縁被覆超電導線の製造方法
JP2022174411A (ja) 超電導コイルおよび超電導コイルの製造方法
JP7710977B2 (ja) 高温超電導コイル装置及び積層型高温超電導コイル装置
JP2025155115A (ja) 超電導コイル
JP2025025333A (ja) バンドル型超電導線材および超電導コイル
JP2019021842A (ja) 超電導コイル
JP2024150977A (ja) 高温超電導線材、超電導コイルおよび超電導磁石装置
JP7420475B2 (ja) 超電導コイル及び超電導装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2023555747

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23936583

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE