Superconducting coil and winding method thereof

Abstract

A superconducting coil according to one aspect of the present invention has a structure in which a first winding part, in which superconducting wires are wound in contact with each other, and a second winding part, in which the superconducting wires and the spacer are wound together, are repeatedly formed. A superconducting coil according to another aspect of the present invention has a structure in which a first' winding part, in which superconducting wires are wound spaced apart from each other, and a second' winding part, in which the superconducting wires and the spacer are wound together, are repeatedly formed. A superconducting coil winding method according to one aspect of the present invention comprises: a superconducting coil winding preparation step; a superconducting wire and spacer winding step; and a superconducting coil completion step. In addition, a superconducting coil winding method according to another aspect of the present invention comprises: a superconducting coil winding preparation step; a superconducting wire and first and second spacer winding steps; a second spacer removal step; and a superconducting coil completion step.

Description

Superconducting coil and winding method thereof

[0001] The present invention relates to a superconducting coil and a winding method thereof, and more particularly, to a superconducting coil and a winding method thereof in which the spacing between superconducting wires is controlled by using a special type of spacer.

[0002] In general, fault current limiters are power devices that protect the power system by reducing the fault current when an accident occurs in the power system. They play a role in minimizing the scope of power outages caused by power system accidents and reducing damage to power devices on the power system lines.

[0003] These current limiters reduce the fault current to an appropriate value within a short period of time when a fault current occurs due to an accident in the power system, thereby preventing mechanical, thermal, and electrical stress on power equipment and improving the reliability of the power system.

[0004] Recently, as the possibility of fault current generation has increased due to the complexity of the current power system, development of a superconducting fault current limiter (SFC) that applies the nonlinear voltage-current characteristics of a superconducting material, such as that shown in Fig. 1, is being actively pursued.

[0005] In this superconducting current limiter, the superconducting current limiter module (3) is configured to be electrically connected to an external power source and an input / output terminal (2) so that an operating current flows.

[0006] Furthermore, the superconducting current-limiting module (3) generates high resistance by transitioning from a superconducting state to a normal conducting state when a fault current is detected, thereby rapidly limiting the fault current. For example, if a fault current flows due to a line fault, it can detect it within 0.1 ms and limit the fault current within several ms, thereby preventing power outages and large-scale ripple failures.

[0007] These superconducting current limiting modules (3) are configured to be immersed in a cooling tank (4) containing a refrigerant (R) in an ultra-low temperature liquid state, thereby maintaining a superconducting state at a temperature of approximately 77 K or lower.

[0008] In other words, the superconducting current limiting module (3) is maintained in a state of being immersed in a refrigerant (R, supercooled liquid nitrogen) to ensure uniform temperature, electrical insulation, and rapid recovery.

[0009] Meanwhile, the superconducting current limiter module (3), which is a core component of this superconducting current limiter, is composed of a series or parallel combination of superconducting coils (1) of a certain capacity in which superconducting wires (20) are wound. As the coils become smaller and lighter for a certain capacity, the operating efficiency of the cryogenic cooling system increases.

[0010] These superconducting wires (20) have superconductivity when current flows below the critical current, but change into normal conductors and have resistance when current flows above the critical current.

[0011] And, in order to concentrate more superconducting wires (20) in a small space, a superconducting coil (1) is manufactured by winding the superconducting wires (20) on a bobbin (10).

[0012] Meanwhile, a technology has been disclosed to wind superconducting wire (20) in a bifilar shape to minimize AC loss.

[0013] This type of bifilar winding is a winding method that crosses and winds superconducting wires (20) through which current flows in different directions, thereby canceling out the inductance components and reducing the total inductance. In other words, the inductance component of the superconducting coil (1) is attenuated, thereby reducing the AC loss component (see Fig. 2).

[0014] At this time, the closer the gap between the superconducting wires (20) through which current flows in different directions, the better the inductance component is attenuated, so the total inductance becomes smaller and the AC loss component can be reduced more.

[0015] The larger the total inductance, the greater the AC resistance that occurs when AC current flows, and the energy generated by AC resistance is called AC loss. In general, the greater the AC loss of the superconducting coil (1), the lower the efficiency of the superconducting coil (1).

[0016] Meanwhile, as shown in Fig. 3, a superconducting coil (1) winding structure with a narrow spacing between wires without using a spacer has been disclosed.

[0017] In this case, the AC loss of the superconducting coil (1) can be reduced, and the size of the coil can also be made smaller.

[0018] However, in the case of a winding shape in which the superconducting wires (20) are in close contact with each other without a gap between them, there is a problem that the superconducting coil (1) is not cooled to an extremely low temperature because a cooling channel through which a coolant flows for cooling is not formed, and there may also be a problem that it is weak to thermal shock.

[0019] In other words, as shown in Fig. 3, when winding so that a superconducting wire (20) and an adjacent superconducting wire (20) are in close contact with each other by applying tension, the superconducting wires (20) are stuck to each other and have strong frictional force, and even when vibration occurs, they can shake as one body because they are stuck to each other. In other words, the vibration resistance is strengthened.

[0020] However, when limiting the fault current due to the operating principle of the superconducting coil (1), a large shock may be applied in an instant, and as shown in Fig. 3, if the tension is strong and the superconducting wires (20) are stuck together, there may be cases where the shock cannot be absorbed. In addition, there was a problem that it was difficult to cool the superconducting wires (20) to an extremely low temperature because there was no gap between the superconducting wires (20) and thus a cooling channel through which the coolant could flow could not be formed.

[0021] To this end, as in FIG. 4, a spacer (30) may be provided between the superconducting wires (20) to be wound, thereby widening the gap between the superconducting wires (20), and a structure may be formed to form a cooling channel through a plurality of holes (40) formed according to the morphological characteristics of the spacer (30).

[0022] However, in the case of a superconducting coil (1) including a spacer (30) like this, although it can have the advantages of excellent cryogenic cooling and resistance to thermal shock through the formation of a cooling channel, the gap between the superconducting wires (20) is wide, which causes a problem in that the cancellation of the inductance component is weakened and the AC loss increases. In addition, the size of the superconducting coil (1) to be wound cannot but also increase.

[0023] Accordingly, in winding the superconducting coil (1) constituting the superconducting current limiting module (3), there is an urgent need to develop a superconducting coil that can have advantages in all aspects of alternating current loss, superconducting coil size, cryogenic cooling, and thermal shock, and this is becoming a major topic in the development of a superconducting current limiter.

[0024] The present invention is intended to solve the above problems, and an object of the present invention is to provide a superconducting coil and a winding method thereof that can have advantages in all aspects of alternating current loss, size of the superconducting coil, cryogenic cooling, and thermal shock.

[0025] In addition, the purpose is to provide a superconducting coil and a winding method thereof that can take advantage of contrasting advantages depending on the spacing between superconducting wires by adjusting the spacing between superconducting wires through the use of a special type of spacer.

[0026] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0027] According to one aspect of the present invention, a superconducting coil is provided.

[0028] In one embodiment, a superconducting coil may include: a bobbin; a superconducting wire wound around the bobbin in at least one bifilar winding shape; and a spacer wound around one side of the superconducting wire and in contact with one side of the superconducting wire around the longitudinal center of the superconducting wire, and disposed between turns of the superconducting wire. At this time, a first winding portion in which the superconducting wires are wound in contact with each other and in close contact with each other, and a second winding portion in which the superconducting wire and the spacer are wound together and the spacer is disposed between the superconducting wires, may be repeatedly formed along the winding direction.

[0029] At this time, the spacer forms a porous portion that is penetrated by a flexible material having elasticity, and the porous portion forms a cooling channel.

[0030] According to another aspect of the present invention, a superconducting coil is provided.

[0031] In another embodiment, a superconducting coil may include: a bobbin; a superconducting wire wound around the bobbin in at least one bifilar winding shape; and a spacer wound together with one side of the superconducting wire at one side of the superconducting wire around the longitudinal center of the superconducting wire and in contact with one side of the superconducting wire, and disposed between turns of the superconducting wire. At this time, a first winding portion formed by removing the spacer after winding the superconducting wires together to form a shock-absorbing space and a second winding portion formed by winding the superconducting wires and the spacer together such that the spacer is disposed between the superconducting wires may be repeatedly formed along the winding direction.

[0032] At this time, the spacer forms a plurality of perforations made of a flexible material having elasticity, and the gap between the perforations and the superconducting wire forms a cooling channel.

[0033] At this time, the superconducting wire may further include a reinforcing tape on one side.

[0034] According to another aspect of the present invention, a method for winding a superconducting coil is provided.

[0035] In one embodiment, a method for winding a superconducting coil may include a superconducting coil winding preparation step of preparing a bobbin, a superconducting wire, and a spacer; a superconducting wire and spacer winding step of winding the superconducting wire around the bobbin by applying tension to have a bifilar winding shape, winding the superconducting wire around the bobbin in a state where one surface of the spacer is in contact with one surface of the superconducting wire on one side centered on the longitudinal center of the superconducting wire, thereby placing the spacer between turns of the superconducting wire; and a superconducting coil completion step of fixing a free end of the superconducting wire wound through the superconducting wire and spacer winding step and completing the superconducting coil.

[0036] Accordingly, the superconducting coil may be repeatedly formed along the winding direction by having a first winding portion in which the superconducting wires are wound in contact with each other and in a close state, and a second winding portion in which the superconducting wires and the spacer are wound together and the spacer is placed between the superconducting wires.

[0037] According to another aspect of the present invention, a method for winding a superconducting coil is provided.

[0038] In another embodiment, a method of winding a superconducting coil comprises: a superconducting coil winding preparation step of preparing a bobbin, a superconducting wire, and first and second spacers; a superconducting wire winding step of applying tension to wind the superconducting wire around the bobbin so as to have a bifilar winding shape, wherein the superconducting wire is wound in a state in which one surface of the superconducting wire on one side is in contact with one surface of the first spacer about the longitudinal center of the superconducting wire, and the other surface of the superconducting wire on the other side is in contact with one surface of the second spacer about the longitudinal center of the superconducting wire, thereby arranging the spacers between turns of the superconducting wire; a second spacer removal step of separating the second spacer between the superconducting wire and the adjacent superconducting wire; And, it may include a superconducting coil completion step of fixing the free end of the superconducting wire wound through the second spacer removal step and completing the superconducting coil.

[0039] Accordingly, the superconducting coil can be repeatedly formed with a first winding portion in which the superconducting wires are wound with a gap between them, and a second winding portion in which the superconducting wires and the spacer are wound together.

[0040] Meanwhile, the second spacer removal step includes an end confirmation process for confirming the free end position of the superconducting coil for which winding is completed, a winding tension reduction process for reducing the winding tension applied to the superconducting wire by applying force in the opposite direction for winding, a second spacer removal process for removing the second spacer, and a winding tension restoration process for applying tension to return the free end position of the superconducting coil to the position confirmed in the end confirmation process.

[0041] At this time, the second spacer includes a protrusion that protrudes upwards beyond the width end of the superconducting wire.

[0042] At this time, the superconducting wire further includes a reinforcing tape on one side.

[0043] According to the above configuration, the superconducting coil and the winding method thereof according to the present invention have the effect of having advantages in all aspects of alternating current loss, size of the superconducting coil, cryogenic cooling, and thermal shock, as the first winding portion in which the superconducting wires are wound while being in contact with each other and the second winding portion in which the superconducting wires and a spacer are wound together are repeatedly formed.

[0044] In addition, the first winding portion, where the superconducting wires and the adjacent superconducting wires are in close contact with each other, has the effect of reducing AC loss through attenuation of the inductance component.

[0045] In addition, it has the effect of improving cooling performance by utilizing the elasticity of the spacer to make it shock-resistant and by securing a cooling channel through which the refrigerant can flow through multiple porous holes formed in the spacer.

[0046] In addition, the superconducting coil and the winding method thereof according to the present invention have a shock-resistant effect because they can absorb shock even without a spacer through the gap between the superconducting wires.

[0047] Additionally, the gap between the superconducting wires acts as a cooling channel through which the coolant can flow, thereby further improving cooling performance.

[0048] Additionally, the superconducting wire has the effect of reinforcing durability against vibration by including a reinforcing tape such as STS tape on one side.

[0049] In other words, the superconducting coil and the winding method thereof according to the present invention have the effect of controlling the spacing between superconducting wires through temporary or partial use of a spacer, thereby taking advantage of only the advantages that are contrasted with each other depending on the spacing between superconducting wires.

[0050] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0051] Figure 1 is a schematic drawing showing an example of a superconducting current limiter according to the prior art.

[0052] Figure 2 is a schematic drawing showing a process of manufacturing a superconducting coil by winding a superconducting wire in a bifilar shape according to a conventional technique.

[0053] Figure 3 is a schematic drawing showing the winding structure of a superconducting coil with a narrow spacing between wires without using a spacer according to a conventional technique.

[0054] Fig. 4 is a schematic drawing showing the winding structure of a superconducting coil with a wide spacing between wires using a spacer according to a conventional technique.

[0055] FIG. 5 and FIG. 6 are schematic drawings showing the winding structure of a superconducting coil according to one embodiment of the present invention.

[0056] FIG. 7 and FIG. 8 are schematic drawings showing the winding structure of a superconducting coil according to another embodiment of the present invention.

[0057] Fig. 9 is a flowchart showing a method for winding a superconducting coil according to one embodiment of the present invention.

[0058] Fig. 10 is a flowchart showing a method for winding a superconducting coil according to another embodiment of the present invention.

[0059] Figures 11 and 12 are schematic drawings showing a winding method of a superconducting coil according to Figure 10.

[0060] The present invention, in its best form, provides a superconducting coil comprising: a bobbin; a superconducting wire wound around the bobbin in at least one bifilar winding shape; and a spacer wound around one side of the superconducting wire and in contact with one side of the superconducting wire at one side of the superconducting wire around the longitudinal center of the superconducting wire, and disposed between turns of the superconducting wire; wherein a first winding portion is wound in a state in which the superconducting wires are in contact with each other and in close contact with each other, and a second winding portion is wound together with the superconducting wire and the spacer, and the spacer is disposed between the superconducting wires, and the superconducting coil is repeatedly formed along the winding direction.

[0061] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals designate identical or similar components throughout the specification.

[0062] The words and terms used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best explain his or her invention.

[0063] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to a preferred embodiment of the present invention, and do not represent all of the technical ideas of the present invention, so there may be various equivalents and modified examples that can replace the configuration at the time of filing of the present invention.

[0064] In this specification, terms such as “include” or “have” are intended to describe the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0065] When a component is said to be "in front of," "behind," "above," or "below" another component, this includes not only being placed "in front of," "behind," "above," or "below" the other component in direct contact with it, but also if there is another component intervening therebetween. Furthermore, when a component is said to be "connected" to another component, this includes not only being directly connected to one another, but also being indirectly connected to one another, unless there are special circumstances.

[0066] In addition, in explaining the present invention, specific descriptions of related known functions or configurations will be omitted in order to avoid obscuring the gist of the present invention.

[0067]

[0068] Hereinafter, a superconducting coil and a winding method thereof according to one embodiment of the present invention will be described with reference to the drawings.

[0069] FIGS. 5 and 6 are schematic drawings showing the winding structure of a superconducting coil according to one embodiment of the present invention, and FIGS. 7 and 8 are schematic drawings showing the winding structure of a superconducting coil according to another embodiment of the present invention.

[0070] Referring to FIGS. 1 and 2 together, as illustrated, a superconducting coil (100, 100') according to one embodiment of the present invention constitutes a superconducting current limiting module (3, FIG. 1) of a superconducting current limiter (1, FIG. 1), and is formed by winding a superconducting wire (110) around a bobbin (10, FIG. 2) and having at least one bifilar winding shape.

[0071] At this time, the superconducting coil (100, 100') of the present invention has a winding structure in which a spacer (120) is placed between the winding turns of the superconducting wire (110) when winding the superconducting wire (110) on the bobbin (10), and which can have advantages in AC loss, size of the superconducting coil, cryogenic cooling, and thermal shock depending on the method of using and placing the spacer (120).

[0072] A bobbin (10) for forming a superconducting coil (100, 100') of the bifilar winding type has a structure including a fixed frame (11, Fig. 2) and a bobbin member (12, Fig. 2), and various known structures and configurations can be applied thereto. Therefore, a detailed description thereof will be omitted in order to avoid obscuring the gist of the present invention.

[0073] In addition, the spacer (120) is formed of a flexible material having elasticity and is placed between the turns of the superconducting wire (110) in the superconducting coil (100), thereby creating a space that absorbs shock and reducing vibration as if it were one body with the superconducting wire (110).

[0074] In other words, the spacer (120) mechanically connects the superconducting wires (110) and the superconducting wires (110) to absorb vibrations and, when an impact occurs, absorbs the impact through elasticity.

[0075] And, in embodiments of the present invention, such spacers (120) may be temporarily placed and then removed as needed, and may be placed between turns of the superconducting wire (110), but may be placed in a partial arrangement (e.g., placed every two turns) that is skipped over the next turn rather than the adjacent turn.

[0076] In addition, the spacer (120) applied to the present invention is wound on a bobbin (10) together with a superconducting wire (110), and includes a plurality of perforations (H, FIGS. 6 and 8) penetrating in the direction of the width (t1, FIG. 12) of the superconducting wire (110) being wound, as it has a honeycomb or spider web shape.

[0077] A plurality of porous holes (H) provided in the spacer (120) serve as cooling channels through which a coolant (R, Fig. 1) can flow, thereby allowing the superconducting coil (100, 100') to be cooled to an extremely low temperature.

[0078]

[0079] Meanwhile, referring again to FIGS. 5 and 6, the winding structure of the superconducting coil (100) according to one embodiment of the present invention will be examined in more detail as follows.

[0080] In one embodiment, the superconducting coil (100) of the present invention is formed by winding a superconducting wire (110) and a spacer (120) around a bobbin (10) as described above.

[0081] At this time, the superconducting wire (110) is wound around the bobbin (10) in at least one bifilar winding shape.

[0082] And, the spacer (120) is wound together with one side of the superconducting wire (110) and placed between the turns of the superconducting wire (110).

[0083] Specifically, the spacer (120) is wound together with one side of the superconducting wire (110) while being in contact with the longitudinal center (O) of the superconducting wire (110) and is placed between turns of the superconducting wire (110).

[0084] Preferably, the spacer (120) may be arranged every two turns of the superconducting wire (110). However, it is not limited thereto, and it is of course possible to arrange it every three turns or multiple turns depending on the size and number of windings of the superconducting coil (100).

[0085] In the city, spacers (120) were placed with one turn of spacer (120) for every two turns of superconducting wire (110).

[0086] In other words, in a superconducting coil (100) according to one embodiment of the present invention, the spacer (120) has a structure of partial arrangement in which it is arranged between turns of the superconducting wire (110) being wound, but is arranged in the next turn that is skipped rather than in the adjacent turn.

[0087] Accordingly, a superconducting coil (100) according to one embodiment of the present invention may have a structure in which a first winding portion in which superconducting wires (110) are wound while coming into contact with each other according to the winding turn, and a second winding portion in which superconducting wires (110) and a spacer (120) are wound together are repeatedly formed.

[0088] Specifically, a superconducting coil (100) according to one embodiment of the present invention forms a contact portion (T / P) where superconducting wires (110) come into contact with each other through a first winding portion in which the superconducting wires (110) are wound while coming into contact with each other according to the winding turn.

[0089] The contact portion (T / P) of this first winding portion is a portion formed by the superconducting wire (110) and the superconducting wire (110) being in close contact with each other due to the tension applied when winding the superconducting coil (100). The superconducting wires (110) are attached to each other due to the tension, resulting in strong frictional force.

[0090] Accordingly, the superconducting wires (110) forming the contact portion (T / P) of the first winding portion are attached to each other even when vibration occurs and shake as one body, and when the superconducting wires (110) vibrate due to the alternating current, they provide the superconducting coil (100) with durability against vibration.

[0091] Meanwhile, as described above, the superconducting coil (100) according to one embodiment of the present invention has a second winding portion in which the superconducting wire (110) and the spacer (120) are wound together. At this time, the spacer (120) is placed between the superconducting wires (110) according to the winding turns, and the spacer (120) can perform the role of a buffer member depending on its morphological characteristics.

[0092] The spacer (120) is wound in close contact with the superconducting wire (110) and the neighboring superconducting wire (110) by the tension applied when winding the superconducting coil (100).

[0093] In addition, the spacer (120) is formed of a flexible material having elasticity, and is placed between the superconducting wires (110) to create a space that absorbs shock, while acting as one body with the superconducting wires (110) to absorb and reduce vibration, and to absorb shock when an impact occurs.

[0094] The first winding portion, in which the superconducting wires (110) are wound while being in contact with each other, and the second winding portion, in which the superconducting wires (110) and the spacer (120) are wound together, have a structure in which the superconducting coil (100) is repeatedly arranged according to the winding of the superconducting wires (110) and the spacer (120).

[0095] Meanwhile, as described above, the spacer (120) that performs the role of a buffer member has a plurality of penetrating holes (H), and these plurality of holes (H) create a space that absorbs shock while also performing the role of a cooling channel through which refrigerant flows.

[0096] In this way, the superconducting coil (100) according to one embodiment of the present invention can have advantages in AC loss, size of the superconducting coil, cryogenic cooling, and thermal shock, as the first winding portion, in which the superconducting wires (110) are wound while being in close contact with each other, and the second winding portion, in which the superconducting wires (110) and the spacer (120) are wound together, are repeatedly arranged according to the winding turns.

[0097] In other words, the contact portion (T / P) of the first winding portion where the superconducting wire (110) and the adjacent superconducting wire (110) are in close contact with each other has the effect of reducing AC loss by attenuating the inductance component.

[0098] In addition, the second winding portion in which a spacer (120) is placed between superconducting wires (110) is resistant to impact by utilizing the elasticity of the spacer (120), and the cooling performance can be improved by securing a cooling channel through the porous portion (H) of the spacer (120).

[0099]

[0100] Next, referring again to FIGS. 7 and 8, the winding structure of a superconducting coil (100) according to another embodiment of the present invention will be examined in more detail as follows.

[0101] In another embodiment, a superconducting coil (100') according to another embodiment of the present invention is formed by winding a superconducting wire (110) and a spacer (120) around a bobbin (10), like the superconducting coil (100) of one embodiment.

[0102] At this time, the superconducting wire (110) is wound around the bobbin (10) in at least one bifilar winding shape.

[0103] And, the spacer (120) is wound together with one side of the superconducting wire (110) and placed between the turns of the superconducting wire (110).

[0104] Specifically, the spacer (120) is wound together with one side of the superconducting wire (110) while being in contact with the longitudinal center (O) of the superconducting wire (110) and is placed between turns of the superconducting wire (110).

[0105] At this time, a superconducting coil (100') according to another embodiment of the present invention is characterized by having a structure in which a first' winding portion in which superconducting wires (110) are wound with a gap (d1) between them and a second' winding portion in which superconducting wires (110) and a spacer (120) are wound together are repeatedly formed.

[0106] The first' winding portion, which is wound with a gap (d1) between the superconducting wires (110), forms a shock-absorbing space (S / P) with the gap (d1) between them, and can perform a role similar to or the same as a spacer (120).

[0107] In other words, the shock absorption space (S / P) formed by the gap (d1) between the first winding portions allows the superconducting wire (110) to sway without the superconducting coil (100) being destroyed even when a large shock is applied for an instant when limiting the fault current, thereby enabling the superconducting wire (110) to sway flexibly and absorb the shock.

[0108] Meanwhile, as described above, a superconducting coil (100') according to another embodiment of the present invention has a second' winding portion in which a superconducting wire (110) and a spacer (120) are wound together. At this time, the spacer (120) is placed between the superconducting wires (110) according to the winding turns, and such a spacer (120) can perform the role of a buffer member depending on its morphological characteristics.

[0109] The role of the spacer (120) of this second winding portion is the same as that of the second winding portion of the superconducting coil (100, FIGS. 5 and 6) according to one embodiment of the present invention, and the spacer (120) is wound in close contact with the superconducting wire (110) and the neighboring superconducting wire (110) by the tension applied when winding the superconducting coil (100).

[0110] In addition, the spacer (120) is formed of a flexible material having elasticity, and is placed between the superconducting wires (110) to create a space that absorbs shock, while acting as one body with the superconducting wires (110) to absorb and reduce vibration, and to absorb shock when an impact occurs.

[0111] In this way, a superconducting coil (100') according to another embodiment of the present invention has a structure in which a first' winding portion in which only the superconducting wire (110) is wound with a gap (d1) therebetween, and a second' winding portion in which the superconducting wire (110) and the spacer (120) are wound together are repeatedly arranged in the superconducting coil (100) according to the winding of the superconducting wire (110) and the spacer (120).

[0112] Meanwhile, as described above, the spacer (120) that performs the role of a buffer member has a plurality of penetrating holes (H), and these plurality of holes (H) create a space that absorbs shock, and together with the shock-absorbing space (S / P) formed by the gap (d1) between the first' winding portions, they perform the role of a cooling channel through which a refrigerant flows.

[0113] Meanwhile, a superconducting coil (100') according to another embodiment of the present invention may have a structure in which a spacer (120) is temporarily placed at each winding turn of the superconducting wire (110) to form a first winding portion in which the superconducting wires (110) are wound with a gap (d1) between them, and then partially removed.

[0114] As shown in the drawing, a superconducting coil (100') according to another embodiment of the present invention, by means of a spacer (120) removed in this manner, can form a shock absorption space (S / P) with a gap (d1) between superconducting wires (110).

[0115] This first 'winding part' can be formed as follows, for example.

[0116] The spacer (120) may be composed of a first spacer (120a) and a second spacer (120b), and may be wound together with a superconducting wire (110) by applying tension to form a superconducting coil (see (a) of FIG. 11), and then, by removing the first spacer (120a) or the second spacer (120b), a first' winding portion may be formed in which the superconducting wires (110) are wound with a gap (d1) between them (see (b) of FIG. 11).

[0117] In the city (Fig. 7), the superconducting coil (100') is in a state where the second spacer (120b) is removed and only the first spacer (120a) remains.

[0118] At this time, the part where the second spacer (120b) was wound forms a gap (d1) between the superconducting wires (110) as the second spacer (120b) is removed.

[0119] In this way, the superconducting wire (110) forming the superconducting coil (100') forms a strong winding structure of the superconducting coil (100') due to tension, so that the winding shape of the superconducting coil (100') is maintained even when the second spacer (120b) is removed.

[0120] Meanwhile, the shock absorption space (S / P) formed by only the superconducting wire (110) of the first winding section having a gap (d1) allows the superconducting wire (110) to sway without the superconducting coil (100) being destroyed even when a large shock is applied for an instant when limiting the fault current, thereby enabling the superconducting wire (110) to sway flexibly and absorb shock.

[0121] In other words, the gap (d1) between the superconducting wires (110) can perform the same role as a spacer (120) made of elastic and flexible material.

[0122] Normally, the spacer (120) is made of a material that can maintain flexibility even in an extremely low temperature environment, but it is difficult to manufacture and the manufacturing cost is bound to be very expensive.

[0123] The superconducting coil (100') made through another embodiment of the present invention can not only reduce the manufacturing cost of the superconducting coil (100') through the above-described structure, but also, of course, can manufacture another superconducting coil (100') by reusing the spacer (120) that is removed and recovered.

[0124] Meanwhile, a superconducting coil (100') according to another embodiment of the present invention may have a structure further including a reinforcing tape (130, Fig. 8) on one surface of a superconducting wire (110).

[0125] Such reinforcing tape (130) may be made of stainless steel (STS), but is not limited thereto.

[0126] This reinforcing tape (130) is attached to one side of the superconducting wire (110) and wound together, thereby further enhancing the vibration resistance of the superconducting coil (100').

[0127] Additionally, it goes without saying that such a reinforcing tape (130) may be further included on one side of the superconducting wire (110) constituting the superconducting coil (100) according to one embodiment of the present invention.

[0128] As described above, in the superconducting coil (100') according to another embodiment of the present invention, the spacer (120) of the second' winding portion is not only resistant to impact by utilizing elasticity, but also improves cooling performance by securing cooling channels through a plurality of porous holes (H) provided in the spacer (120).

[0129] In addition, the shock absorption space (S / P) formed through the gap (d1) between the superconducting wires (110) and the superconducting wires (110) enables shock absorption even without a spacer (120), so that not only is the shock resistant, but the gap (d1) also functions as a cooling channel, thereby improving cooling performance.

[0130] In addition, the superconducting wire (110) can further increase durability against vibration by including a reinforcing tape (130) such as an STS tape on one side.

[0131]

[0132] Meanwhile, FIG. 9 is a flowchart showing a method for winding a superconducting coil according to one embodiment of the present invention.

[0133] Referring to FIGS. 5 and 6 together, a winding method of a superconducting coil (100) according to one embodiment of the present invention will be described as follows.

[0134] As described above, a superconducting coil (100) according to one embodiment of the present invention is formed by repeatedly arranging a first winding portion in which superconducting wires (110) are wound while contacting each other according to the winding turn, and a second winding portion in which superconducting wires (110) and a spacer (120) are wound together.

[0135] To this end, a method for winding a superconducting coil according to one embodiment of the present invention largely includes a superconducting coil winding preparation step (S10), a superconducting wire and spacer winding step (S20), and a superconducting coil completion step (S30).

[0136] First, the superconducting coil winding preparation step (S10) is a step of preparing a bobbin (10, Fig. 2), a superconducting wire (110), and a spacer (120) for forming a superconducting coil (100).

[0137] The bobbin (10) has a structure in which the superconducting coil (100) can have a bifilar winding form, and it goes without saying that various known bobbins (10) with different structures and configurations can be used as needed.

[0138] And the superconducting wire (110) is a wire having a width and a length, and has superconductivity when current flows below the critical current, but changes into a normal conductor when current flows above the critical current and has resistance.

[0139] And, these superconducting wires (110) have a width of setting (t1, Fig. 12).

[0140] Meanwhile, the spacer (120) includes a plurality of perforations (H) that are penetrated by a flexible material having elasticity as described above.

[0141] And, the spacer (120) has a length and width corresponding to the superconducting wire (110) described above, and in the superconducting coil (100) of one embodiment, the width of the spacer (120) may have the same size as the width of the superconducting wire (110).

[0142] In the superconducting coil winding preparation step (S10), a process is performed to wind the superconducting wire (110) and spacer (120) together on the bobbin (10).

[0143] Then, the superconducting wire and spacer winding step (S20) is performed.

[0144] The superconducting wire and spacer winding step (S20) is a step of winding the superconducting wire (110) around the bobbin (10) by applying tension to form a bifilar winding shape.

[0145] At this time, the superconducting wire and spacer winding step (S20) has a process of winding the superconducting wire (110) with one side of the spacer (120) in contact with one side of the superconducting wire (110) around the longitudinal center (O, Fig. 5) of the superconducting wire, thereby placing the spacer (120) between the winding turns of the superconducting wire (110).

[0146] More specifically, with the longitudinal center (O) of the superconducting wire (110) positioned at the center of the base plate (11, Fig. 2) of the bobbin (10), both sides of the superconducting wire (110) are each wound around a pair of protruding bobbin members (12, Fig. 2).

[0147] At this time, one side of the spacer (120) is placed in contact with one side of the superconducting wire (110) with the longitudinal center (O, Fig. 5) of the superconducting wire (110) as the center, and is wound together with the superconducting wire (110).

[0148] At this time, the spacer (120) is wound with one turn placed for every two turns of winding of the superconducting wire (110).

[0149] Then, the superconducting wire (110) and spacer (120) are wound sequentially along a path several times to have a bifilar winding shape.

[0150] Accordingly, the superconducting coil (100) has a structure in which a first winding portion in which superconducting wires (110) are wound while being in contact with each other and a second winding portion in which superconducting wires (110) and a spacer (120) are wound together are repeatedly arranged and formed.

[0151] When the bifilar winding of the superconducting wire (110) is completed in this way, the free ends (a1, a2) of the superconducting wire (110) are positioned on the left and right sides of the base plate (11), respectively.

[0152] Next, the superconducting coil completion step (S30) is a step of fixing the free ends (a1, a2) of the superconducting wire (110) wound through the superconducting wire and spacer winding step (S20), thereby completing the superconducting coil (100) according to one embodiment of the present invention.

[0153] Meanwhile, the bobbins (10) on which the winding of the superconducting coil (100) is completed are sequentially stacked in the vertical direction, and then the superconducting wire (110) is electrically connected in series or parallel manner, thereby performing the role of a superconducting current limiting module (3, Fig. 1).

[0154]

[0155] Meanwhile, FIG. 10 is a flowchart showing a winding method of a superconducting coil according to another embodiment of the present invention, and FIGS. 11 and 12 are schematic drawings showing a winding method of a superconducting coil according to FIG. 10.

[0156] Referring to FIGS. 7 and 8 together, a winding method of a superconducting coil (100') according to another embodiment of the present invention is as follows.

[0157] As described above, a superconducting coil (100') according to another embodiment of the present invention has a structure in which a first' winding portion, in which superconducting wires (110) are wound with a gap (d1) between them, and a second' winding portion, in which superconducting wires (110) and a spacer (120) are wound together, are repeatedly formed.

[0158] At this time, the gap (d1) between the first' winding portions can form a shock absorption space (S / P).

[0159] To this end, a method for winding a superconducting coil according to another embodiment of the present invention largely includes a superconducting coil winding preparation step (S'10), a superconducting wire and first and second spacer winding step (S'20), a second spacer removal step (S'30), and a superconducting coil completion step (S'40).

[0160] First, the superconducting coil winding preparation step (S'10) is a step of preparing a bobbin (10, Fig. 2), a superconducting wire (110), and a spacer (120) for forming a superconducting coil (100').

[0161] The bobbin (10) has a structure in which the superconducting coil (100') can have a bifilar winding form, and it goes without saying that various known bobbins (10) with different structures and configurations can be used as needed.

[0162] And the superconducting wire (110) is a wire having a set width and length, and has superconductivity when current flows below the critical current, but changes into a normal conductor when current flows above the critical current and has resistance.

[0163] And, these superconducting wires (110) have a width of setting (t1, Fig. 12).

[0164] Meanwhile, the spacer (120) includes a plurality of perforations (H) that are penetrated by a flexible material having elasticity as described above.

[0165] And, the spacer (120) has a length and width corresponding to the superconducting wire (110) described above, and in the superconducting coil (100') of another embodiment, the width (t2) of the spacer (120) may have the same width as the width of the superconducting wire (110) or may have a width (t2, FIG. 12) of a larger size.

[0166] And, the spacer (120) is prepared to be divided into a first spacer (120a) and a second spacer (120b).

[0167] In this way, in the superconducting coil winding preparation step (S'10), a preparation process is performed to wind the superconducting wire (110) and the first spacer (120a) and the second spacer (120b) together on the bobbin (10).

[0168] Then, the superconducting wire and the first and second spacer winding steps (S'20) are performed.

[0169] The superconducting wire and first and second spacer winding steps (S'20) are steps in which the superconducting wire (110) is wound around the bobbin (10) by applying tension to form a bifilar winding shape.

[0170] At this time, referring to (a) of FIG. 11, the superconducting wire and the first and second spacer winding step (S'20) has a process of winding the superconducting wire (110) with one side of the superconducting wire (110) in contact with one side of the first spacer (120a) around the longitudinal center (O, FIG. 11) of the superconducting wire, thereby placing the first spacer (120a) between the winding turns of the superconducting wire (110).

[0171] And, there is a process of winding the superconducting wire (110) with one side of the second spacer in contact with the other side of the superconducting wire (110) with the longitudinal center (O) of the superconducting wire (110) as the center, and placing the second spacer (120b) between the winding turns of the superconducting wire (110).

[0172] Although the process of placing the first spacer (120a) and the process of placing the second spacer (120b) are described separately, they are of course performed simultaneously.

[0173] More specifically, with the longitudinal center (O) of the superconducting wire (110) positioned at the center of the base plate (11, Fig. 2) of the bobbin (10), both sides of the superconducting wire (110) are each wound around a pair of protruding bobbin members (12, Fig. 2).

[0174] At this time, one side of the superconducting wire (110) is placed on one side, that is, one side of the superconducting wire (110) placed on one of the protruding bobbin members (12), with the center (O, Fig. 5) of the longitudinal direction of the superconducting wire (110) as the center, and the first spacer (120a) is placed in contact with the superconducting wire (110) and wound together with the superconducting wire (110).

[0175] Then, one side of the second spacer (120b) is placed in contact with the other side of the superconducting wire (110) placed on the other side, that is, on one of the protruding bobbin members (12), with the longitudinal center (O, Fig. 5) of the superconducting wire (110) as the center, and is wound together with the superconducting wire (110).

[0176] Then, the superconducting wire (110) and the first spacer (120a) and the second spacer (120b) are wound sequentially along a path several times to have a bifilar winding shape.

[0177] When the bifilar winding of the superconducting wire (110) is completed in this way, the free ends (a1, a2) of the superconducting wire (110) are positioned on the left and right sides of the base plate (11), respectively.

[0178] At this time, the first spacer (120a) and the second spacer (120b) are placed and wound at each winding turn of the superconducting wire (110) (see (a) of FIG. 11).

[0179] Next, a method for winding a superconducting coil according to another embodiment of the present invention performs a second spacer removal step (S'30).

[0180] Meanwhile, the second spacer removal step (S'30) may be a step of removing either the first spacer (120a) or the second spacer (120b). However, for the purpose of explaining the embodiment of the present invention, the second spacer (120b) will be described as being removed, and it will be apparent that removing the first spacer (120a) rather than the second spacer (120b) does not go beyond the scope of the present invention.

[0181] The second spacer removal step (S'30) is a step of separating and removing the second spacer (120b) wound and arranged between the superconducting wires (110).

[0182] This second spacer (120b) can be removed using various known mechanical devices, and is not limited to any one method as long as the second spacer (120b) can be removed.

[0183] Meanwhile, as described above, the spacer (120) has a length and width corresponding to the superconducting wire (110) described above, but the width of the spacer (120; 120a, 120b) in the superconducting coil (100') may have a width (t2, Fig. 12) that is larger than the width of the superconducting wire (110).

[0184] Accordingly, a superconducting coil (100') having a bifilar winding form through the superconducting wire and the first and second spacer winding steps (S'20) can be wound with the second spacer (120b) forming a protrusion (121) protruding upward from the upper width end of the superconducting wire (110), as shown in FIG. 12.

[0185] Accordingly, in the winding structure of the superconducting coil (100'), the worker can remove it by holding the protrusion (121) of the second spacer (120b) and applying an external force.

[0186] Meanwhile, in a method for winding a superconducting coil according to another embodiment of the present invention, the following process may be included to facilitate removal of the second spacer (120b).

[0187] Specifically, the second spacer removal step (S'30) includes an end confirmation process for confirming the position of the free end (a1, a2) of the superconducting coil (100') on which winding is completed, a winding tension reduction process for reducing the winding tension applied to the superconducting wire (110) by applying force in the opposite direction for winding, a second spacer removal process for removing the second spacer (120b), and a winding tension restoration process for applying tension to return the position of the free end (a1, a2) of the superconducting coil (100') to the position confirmed in the end confirmation process.

[0188] In this way, the second spacer removal step (S'30) temporarily reduces the tension for winding and temporarily stretches the superconducting wire (110) by applying force in the opposite direction to facilitate the removal of the second spacer (120b).

[0189] Accordingly, the winding tension applied to the second spacer (120b) is temporarily relieved, making removal of the second spacer (120b) easier.

[0190] Accordingly, the superconducting coil (100') has a structure in which a first' winding portion, in which superconducting wires (110) are wound with a gap (d1) between the superconducting wires (110), and a second' winding portion, in which a first spacer (120a) is placed between the superconducting wires (110), are repeatedly arranged.

[0191] When the bifilar winding of the superconducting wire (110) is completed in this way, the free ends (a1, a2) of the superconducting wire (110) are positioned on the left and right sides of the base plate (11), respectively.

[0192] Next, the superconducting coil completion step (S'40) is a step of fixing the free ends (a1, a2) of the wound superconducting wire (110), through which a superconducting coil (100') according to another embodiment of the present invention is completed.

[0193] Meanwhile, the superconducting coil (100') wound on the bobbin (10) in this way performs the role of a superconducting current limiting module (3, Fig. 1) when the bobbins (10) on which the winding is completed are sequentially stacked in a vertical direction and then the superconducting wires (110) are electrically connected in series or parallel.

[0194]

[0195] As described above, the superconducting coil and the winding method thereof according to the embodiments of the present invention can adjust the spacing between superconducting wires (110) through temporary or partial use of the spacer (120), and can take advantage of only the contrasting advantages depending on the spacing between the superconducting wires (110).

[0196] Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

Claims

1. Bobbin; A superconducting wire having at least one bifilar winding shape centered on the bobbin; and Including a spacer that is wound together with one side of the superconducting wire while being in contact with one side of the superconducting wire around the longitudinal center of the superconducting wire and is placed between turns of the superconducting wire; A superconducting coil, wherein a first winding portion is wound in a state where the superconducting wires are in contact with each other and in close contact, and a second winding portion is wound together with the superconducting wires and the spacer, and the spacer is placed between the superconducting wires, and the superconducting coil is repeatedly formed along the winding direction.

2. In paragraph 1, The above spacer, It is a flexible material with elasticity, and forms a perforated hole. The above-mentioned porous portion forms a superconducting coil, which forms a cooling channel.

3. Bobbin; A superconducting wire having at least one bifilar winding shape centered on the bobbin; and Including a spacer that is wound together with one side of the superconducting wire while being in contact with one side of the superconducting wire around the longitudinal center of the superconducting wire and is placed between turns of the superconducting wire; A superconducting coil, wherein a first winding portion is wound while forming a shock-absorbing space by removing the spacer after winding the superconducting wires, and a second winding portion is wound together with the superconducting wires and the spacer, and the spacer is placed between the superconducting wires, and is repeatedly formed along the winding direction.

4. In paragraph 3, The above spacer is made of a flexible material having elasticity and forms a plurality of perforated holes. A superconducting coil in which the gap between the above-mentioned porous portion and the above-mentioned superconducting wire forms a cooling channel.

5. In paragraph 1 or paragraph 3, A superconducting coil, wherein the above superconducting wire further includes a reinforcing tape on one side.

6. Superconducting coil winding preparation step, which involves preparing bobbin, superconducting wire and spacer; A superconducting wire and spacer winding step, which includes a process of winding the superconducting wire around the bobbin to have a bifilar winding shape by applying tension, and winding the superconducting wire with one side of the spacer in contact with one side of the superconducting wire on one side around the longitudinal center of the superconducting wire, thereby placing the spacer between turns of the superconducting wire; and, A superconducting coil completion step comprising: fixing the free end of the superconducting wire wound through the superconducting wire and spacer winding step and completing the superconducting coil; The above superconducting coil, A winding method for a superconducting coil, wherein a first winding portion is wound in a state where the superconducting wires are in contact with each other and in close contact, and a second winding portion is wound together with the superconducting wires and the spacer, and the spacer is placed between the superconducting wires, are repeatedly formed along the winding direction.

7. Superconducting coil winding preparation step, which prepares a bobbin, superconducting wire, and first and second spacers; A superconducting wire and first and second spacer winding step, which includes a process of winding the superconducting wire around the bobbin to have a bifilar winding shape by applying tension, a process of winding the superconducting wire in a state where one side of the superconducting wire is in contact with one side of the first spacer about the longitudinal center of the superconducting wire, and a process of winding the superconducting wire in a state where one side of the second spacer is in contact with the other side of the superconducting wire about the longitudinal center of the superconducting wire, thereby placing the spacer between turns of the superconducting wire; A second spacer removal step for separating the second spacer between the superconducting wire and the adjacent superconducting wire; and A superconducting coil completion step comprising: fixing the free end of the superconducting wire wound through the second spacer removal step and completing the superconducting coil; The above superconducting coil, A winding method for a superconducting coil, wherein a first winding portion in which the superconducting wires are wound with a gap between them and a second winding portion in which the superconducting wires and the spacer are wound together are repeatedly formed.

8. In paragraph 7, The above second spacer removal step is, An end confirmation process for confirming the free end position of the above superconducting coil after winding is completed, A winding tension reduction process that reduces the winding tension applied to the superconducting wire by applying a force in the opposite direction for winding, A second spacer removal process for removing the second spacer, A winding method of a superconducting coil, comprising a winding tension restoration process for applying tension to return the free end position of the superconducting coil to the position confirmed in the end confirmation process.

9. In paragraph 7, A method for winding a superconducting coil, wherein the second spacer includes a protrusion protruding upwards beyond the width end of the superconducting wire.

10. In paragraph 6 or 7, A method for winding a superconducting coil, wherein the above superconducting wire further includes a reinforcing tape on one side.

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