Coil for high temperature superconductor magnet for maintaining superconductivity, and manufacturing method therefor

Abstract

The present invention relates to a coil for a high temperature superconductor (HTS) magnet and, more particularly, to a coil for an HTS magnet for maintaining superconductivity, and a manufacturing method therefor. To this end, the coil for an HTS magnet for maintaining superconductivity is provided, the coil (50) for an HTS magnet being manufactured by winding an HTS wire rod (10) on a rotating bobbin (30), and comprising: a metal conductor (100) for covering, between an inner circumferential surface (70) and an outer circumferential surface (80) of the coil (50), a winding plane (60) of the coil (50); and a joining means for electrically connecting the metal conductor and the coil.

Description

Coil for high-temperature superconducting magnet to maintain superconductivity and manufacturing method thereof

[0001] The present invention relates to a coil for a high-temperature superconductor (HTS) magnet, and more particularly, to a coil for a high-temperature superconductor magnet for maintaining superconductivity and a method for manufacturing the same.

[0002] Typically, coils for high-temperature superconducting magnets are tape-shaped wires that are continuously wound around a bobbin to form an electromagnet. Fig. 1 is a schematic cross-sectional shape of such a high-temperature superconducting wire (10). As illustrated in Fig. 1, the high-temperature superconducting wire (10) is very thin and has a very long tape shape, and its cross-section is formed of a multilayer structure including metal.

[0003] Fig. 2 is a schematic perspective view of a winding device for winding a coil for a high-temperature superconducting magnet. As illustrated in Fig. 2, a winding shaft (20) and a winding table (40) rotate at a constant speed. A bobbin (30) is fitted to the winding shaft (20). A high-temperature superconducting wire (10) is wound around the bobbin (30) to form a pancake coil (50).

[0004] However, such pancake coils (50) may experience a quench phenomenon, which causes the superconductivity to be lost during operation of high-temperature superconductors. In addition, a non-insulated winding method was used to protect the coil (50) from this quench phenomenon. When the quench phenomenon occurs, the non-insulated winding prevents excessive heat from being generated at the point where the quench phenomenon occurs by bypassing the operating current between the non-insulated turns. Fig. 7 is a graph showing the resistance value that changes according to the operating state in a conventional coil. As shown in Fig. 7, it can be seen that as the number of shutdown tests increases on the horizontal axis, the contact resistance value on the vertical axis increases. Since the resistance value that occurs between turns in such a non-insulated winding changes depending on various variables such as the operating conditions and the condition of the wire surface, it was difficult to fix and control it to a desired value.

[0005] Prior art literature

[0006] Patent documents

[0007] (Patent Document 1) 1. Republic of Korea Patent Publication No. 10-2022-0059886 (Superconducting wire and manufacturing method thereof),

[0008] (Patent Document 2) 2. Republic of Korea Patent Registration No. 10-1158747 (Ceramic wire forming method, ceramic wire forming system, and superconducting wire using the same),

[0009] (Patent Document 3) 3. Republic of Korea Patent Registration No. 10-1256561 (Superconducting coil and manufacturing method thereof).

[0010] Accordingly, the present invention has been devised to solve the above problems, and the problem to be solved by the present invention is to provide a coil for a high-temperature superconducting magnet and a method for manufacturing the same to maintain superconductivity to protect the superconducting coil from the quench phenomenon.

[0011] However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0012] In order to achieve the above technical task, a coil for a high-temperature superconducting magnet (50) is provided for maintaining superconductivity, characterized in that it comprises a metal conductor (100) covering between an inner surface (70) and an outer surface (80) of a coil (50) in a winding plane (60) of the coil (50) in order to manufacture a high-temperature superconducting (HTS) wire (10) wound on a rotating bobbin (30); and a connecting means for electrically connecting the metal conductor and the coil.

[0013] In addition, the metal conductor (100) has one side shaped like a corner arc of the inner diameter surface (70), and the other side shaped like a corner arc of the outer diameter surface (80).

[0014] In addition, the metal conductor (100) may further include an inner diameter portion (110) that is bent from one side and shaped to fit the inner diameter surface (70); and an outer diameter portion (120) that is bent from the other side and shaped to fit the outer diameter surface (80).

[0015] Additionally, the metal conductor (100) connects the inner diameter (110) and the outer diameter (120) in a spiral shape.

[0016] Additionally, the metal conductor (100) includes at least one selected from the group consisting of copper, gold, aluminum, and alloys thereof.

[0017] Additionally, the joining method is soldering.

[0018] Additionally, the cross-section of the high-temperature superconducting wire (10) includes a substrate including at least one of copper, brass, stainless steel, nickel steel, and tungsten.

[0019] In addition, the high-temperature superconducting wire (10) includes at least one of a silver (Ag) layer, a GdBCO-HTS layer, a YBCO layer, a SmBCO layer, a LMO (Lithium ion Manganese Oxide) layer, a MgO layer, a Y2O3 / Al2O3 layer, a REBCO (Rare-Earth Barium Copper Oxide) layer, a BSCCO (Bismuth Strontium Calcium Copper Oxide) layer, a nickel-tungsten substrate layer, and a stabilizer layer including copper.

[0020] The above-described object of the present invention can also be achieved by a method for manufacturing a coil for a high-temperature superconducting magnet for maintaining superconductivity, which is characterized in that, in another category, the method for manufacturing a coil for a high-temperature superconducting magnet includes a step (S100) of manufacturing a coil for a high-temperature superconducting magnet by winding a high-temperature superconducting wire (10); a step (S110) of preparing a metal conductor (100) covering between the inner surface (70) and the outer surface (80) of the coil (50) in the winding plane (60) of the coil (50); a step (S120) of positioning the metal conductor (100) in the winding plane (60); and a step (S140) of joining the coil (50) and the metal conductor (100) with a joining means.

[0021] In addition, the metal conductor (100) further includes an inner diameter portion (110) that is bent from one side and shaped to fit an inner diameter surface (70); and an outer diameter portion (120) that is bent from the other side and shaped to fit an outer diameter surface (80); and the preparation step (S110) further includes a step of bending the inner diameter portion (110) and the outer diameter portion (120).

[0022] In addition, the bonding step (S140) includes one of the steps of bonding at least one of each corner of the flat portion (130) of the metal conductor (100), the step of bonding at least one of each corner of the inner portion (110), and the step of bonding at least one of each corner of the outer portion (120).

[0023] According to one embodiment of the present invention, resistance can be controlled by providing an electrical connection by selectively soldering only a portion of a coil winding with a metal conductor, and resistance having an insensitive change to operating conditions can be created by using soldering.

[0024] This can suppress the occurrence of the quench phenomenon and allow the coil for high-temperature superconducting magnets to maintain a constant superconductivity without losing it.

[0025] However, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0026] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0027] Figure 1 is a schematic cross-sectional shape of a high-temperature superconducting wire (10) used in the present invention.

[0028] Figure 2 is a schematic perspective view of a winding device for winding a coil for a high-temperature superconducting magnet according to the present invention.

[0029] Figure 3 is an exploded perspective view of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to one embodiment of the present invention.

[0030] Figure 4 is a perspective view of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to one embodiment of the present invention.

[0031] Figure 5 is a photograph of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to one embodiment of the present invention.

[0032] Figure 6 is a flow chart schematically showing a method for manufacturing a coil for a high-temperature superconducting magnet to maintain superconductivity according to one embodiment of the present invention.

[0033] Figure 7 is a graph showing the resistance value that changes depending on the operating status in a conventional coil.

[0034] FIG. 8 is a plan view of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to another embodiment of the present invention.

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present invention. However, the description of the present invention is merely an embodiment for structural and functional explanation, and therefore the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be modified in various ways and can have various forms, the scope of the present invention should be understood to include equivalents that can realize the technical idea. In addition, the purposes or effects presented in the present invention do not mean that a specific embodiment must include all of them or only such effects, and therefore the scope of the present invention should not be construed as being limited thereby.

[0036] The meanings of terms described in the present invention should be understood as follows.

[0037] Terms such as "first" and "second" are intended to distinguish one component from another, and the scope of the rights should not be limited by these terms. For example, a first component could be referred to as a second component, and similarly, a second component could also be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that it may be directly connected to that other component, but there may also be other components in between. Conversely, when a component is referred to as being "directly connected" to another component, it should be understood that there are no other components in between. Meanwhile, other expressions describing the relationship between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0038] Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "has" should be understood to specify the presence of stated features, numbers, steps, operations, components, parts, or combinations thereof, but not to exclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0039] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted to be consistent with their meaning within the context of the relevant technology, and should not be interpreted as having ideal or overly formal meanings unless explicitly defined herein.

[0040] Composition of the example

[0041] Hereinafter, the configuration of a preferred embodiment will be described in detail with reference to the attached drawings. Fig. 1 is a schematic cross-sectional shape of a high-temperature superconductor (HTS) wire (10) used in the present invention. As illustrated in Fig. 1, the cross-section of the high-temperature superconductor wire (10) includes a substrate including at least one of copper, brass, stainless steel, nickel steel, and tungsten. In addition, the high-temperature superconducting wire (10) includes at least one of a silver (Ag) layer, a GdBCO-HTS layer, a YBCO layer, a SmBCO layer, a LMO (Lithium ion Manganese Oxide) layer, a MgO layer, a Y2O3 / Al2O3 layer, a REBCO (Rare-Earth Barium Copper Oxide) layer, a BSCCO (Bismuth Strontium Calcium Copper Oxide) layer, a nickel-tungsten substrate layer, and a stabilizer layer including copper. The high-temperature superconducting wire (10) having this cross-sectional structure is very thin, has a width of 5 to 20 mm, and has very flexible properties.

[0042] FIG. 2 is a schematic perspective view of a winding device for winding a coil for a high-temperature superconducting magnet according to the present invention. As shown in FIG. 2, a winding shaft (20) and a winding table (40) rotate at a constant speed. A bobbin (30) is fitted to the winding shaft (20). A high-temperature superconducting wire (10) is wound around the bobbin (30) and expands in the radial direction to form a pancake coil (50). The bobbin (30) and pancake coil (50) thus manufactured form an electromagnet.

[0043] FIG. 3 is an exploded perspective view of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to an embodiment of the present invention, FIG. 4 is a perspective view of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to an embodiment of the present invention, and FIG. 5 is a photograph of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to an embodiment of the present invention.

[0044] As illustrated in FIGS. 3 to 5, the metal conductor (100) covers the area between the inner surface (70) and the outer surface (80) of the coil (50) in the winding plane (60) of the coil (50). One side (e.g., the inner side of the long side) of the metal conductor (100) is shaped to fit the corner arc of the inner surface (70), and the other side (e.g., the outer side of the long side) is shaped to fit the corner arc of the outer surface (80). In addition, the inner portion (110) of the metal conductor (100) is bent from one side to fit the inner surface (70). The outer portion (120) of the metal conductor (100) is bent from the other side to fit the outer surface (80). That is, the inner portion (110) and the outer portion (120) are formed as a part of an arc.

[0045] These metal conductors (100) include at least one material selected from the group consisting of copper, gold, aluminum, and alloys thereof, and are in the shape of thin sheets.

[0046] The joining means electrically connects the metal conductor (100) and the coil. Examples of such joining means include soldering, paste soldering, or soldering. Optionally, the joining means may be assembled into a metal pattern, or soldering may be omitted. The joining portion (90) formed by the joining means may be formed at each corner of the flat portion (130) of the metal conductor (100). Optionally, the joining portion (90) may be formed at each corner of the inner diameter portion (110) and each corner of the outer diameter portion (120).

[0047] In this way, by connecting only a portion of the metal conductor (100) on the winding plane (60), resistance can be controlled and the quenching phenomenon can be suppressed or prevented.

[0048] Fig. 8 is a plan view of a coil for a high-temperature superconducting magnet for maintaining superconductivity according to another embodiment of the present invention. As illustrated in Fig. 8, a plurality of metal conductors (100) (e.g., three) may be evenly arranged in a spiral shape. To this end, each metal conductor (100) has a configuration of a metal sheet in a spiral shape on a plane.

[0049] Manufacturing method of the example

[0050] Hereinafter, a manufacturing method of a preferred embodiment will be described in detail with reference to the attached drawings. FIG. 6 is a flowchart schematically showing a method for manufacturing a coil for a high-temperature superconducting magnet for maintaining superconductivity according to an embodiment of the present invention. As illustrated in FIG. 6, first, a high-temperature superconducting wire (10) is wound as in FIG. 2 to manufacture a coil (50) for a high-temperature superconducting magnet (S100). In parallel with or sequentially with the manufacturing step (S100), a metal conductor (100) covering the space between the inner diameter surface (70) and the outer diameter surface (80) of the coil (50) in the winding plane (60) of the coil (50) is prepared (S110). In the preparation step (S110), the inner diameter portion (110) and the outer diameter portion (120) can be prepared by bending. The bending of the inner diameter (110) and outer diameter (120) may also be performed in the positioning step (S120).

[0051] Next, the metal conductor (100) is positioned on the winding plane (60) (S120). That is, the inner diameter portion (110), the flat portion (130), and the outer diameter portion (120) are fitted on the winding plane (60) of the coil (50).

[0052] Next, the inserted coil (50) and the metal conductor (100) are joined using a joining means (S140) to complete the process.

[0053] The detailed description of the preferred embodiments of the present invention disclosed above has been provided to enable those skilled in the art to implement and practice the present invention. While the above description has been made with reference to preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can utilize the individual components described in the above-described embodiments in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0054] The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics thereof. Therefore, the above detailed description should not be construed in any way as limiting but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all changes coming within the equivalent scope of the claims are intended to be included therein. The present invention is not intended to be limited to the embodiments set forth herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Furthermore, claims that are not explicitly cited in the claims may be combined to form an embodiment or incorporated into a new claim by post-application amendment.

[0055] Description of the symbol

[0056] 10: High-temperature superconducting wire,

[0057] 20: Winding axis,

[0058] 30: Bobbin,

[0059] 40: Winding table,

[0060] 50: Pancake Coil,

[0061] 60: Winding plane,

[0062] 70: inner diameter,

[0063] 80: Outer diameter,

[0064] 90: Joint,

[0065] 100: Metal conductor,

[0066] 110: Internal organs,

[0067] 120: External view,

[0068] 130: Flat surface.

Claims

1. In a coil (50) for a high-temperature superconducting magnet manufactured by winding a high-temperature superconductor (HTS) wire (10) on a rotating bobbin (30), A metal conductor (100) covering between the inner diameter surface (70) and the outer diameter surface (80) of the coil (50) in the winding plane (60) of the coil (50); and A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized by including a joining means for electrically connecting the metal conductor and the coil.

2. In paragraph 1, The above metal conductor (100) is One side is shaped to match the corner arc of the inner surface (70), and A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that the corner arc of the outer surface (80) is shaped to match the shape of the other side.

3. In paragraph 2, The above metal conductor (100) is An inner diameter portion (110) bent from the above side and shaped to fit the inner diameter surface (70); and A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that it further includes an outer diameter portion (120) that is bent from the above-mentioned side and is shaped to fit the outer diameter surface (80).

4. In paragraph 3, A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that the metal conductor (100) is connected in a spiral shape between the inner diameter portion (110) and the outer diameter portion (120).

5. In paragraph 1, A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that the metal conductor (100) comprises at least one selected from the group consisting of copper, gold, aluminum, and alloys thereof.

6. In paragraph 1, A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that the above-mentioned joining means is soldering.

7. In paragraph 1, A coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that the cross-section of the above high-temperature superconducting wire (10) includes a substrate containing at least one of copper, brass, stainless steel, nickel steel, and tungsten.

8. In paragraph 1, The above high-temperature superconducting wire (10) is a coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that it includes at least one of a silver (Ag) layer, a GdBCO-HTS layer, a YBCO layer, a SmBCO layer, a LMO (Lithium ion Manganese Oxide) layer, a MgO layer, a Y2O3 / Al2O3 layer, a REBCO (Rare-Earth Barium Copper Oxide) layer, a BSCCO (Bismuth Strontium Calcium Copper Oxide) layer, a nickel-tungsten substrate layer, and a stabilizer layer containing copper.

9. In a method for manufacturing a coil for a high-temperature superconducting magnet according to any one of claims 1 to 8, Step (S100) of manufacturing a coil (50) for a high-temperature superconducting magnet by winding a high-temperature superconducting wire (10); In parallel with the above manufacturing step (S100), a step (S110) of preparing a metal conductor (100) that covers between the inner diameter surface (70) and the outer diameter surface (80) of the coil (50) in the winding plane (60) of the coil (50); Step (S120) of positioning the metal conductor (100) on the winding plane (60); and A method for manufacturing a coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized by including a step (S140) of joining the coil (50) and the metal conductor (100) using a joining means.

10. In paragraph 9, The above metal conductor (100) is An inner diameter portion (110) bent from the above side and shaped to fit the inner diameter surface (70); and It further includes an outer diameter portion (120) that is bent from the above-mentioned side and is shaped to fit the outer diameter surface (80); and A method for manufacturing a coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that the above preparation step (S110) further includes a step of bending the inner diameter portion (110) and the outer diameter portion (120).

11. In paragraph 10, The above bonding step (S140) is A step of joining at least one of each corner of the flat portion (130) of the above metal conductor (100), A step of joining at least one of each corner of the inner diameter portion (110), and A method for manufacturing a coil for a high-temperature superconducting magnet for maintaining superconductivity, characterized in that it includes one of the steps of joining at least one of each corner of the outer diameter portion (120).

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