JP5378029B2 - Displacement method of conductive coil and conductive coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive coil transposition method, with which a transposition space is minimized, winding efficiency of a conductive wire with respect to a winding frame is improved and the conductive coil is miniaturized at the time of dividing the conductive wire into a plurality of wire groups so as to wind them, and a vertical magnetic field to the conductive wire is reduced, conduction current can be increased and AC loss can be reduced, and to provide the conductive coil. <P>SOLUTION: A wire A (101b) at the uppermost stage is wound to the lowermost stage while it is shifted to a winding direction of a wire group 7b. The wire A (101b) is completely wound to the lowermost stage (namely, winding frame 3), and remaining wires B to G are shifted and loaded onto the wire A. Shift of wires B (102b) to G (107b) of the wire group 7b onto the wire A is started and the adjacent wire group 7a is transposed in the same way as the wire group 7b. Shift length (C in the drawing) in a circumferential direction from a transposition start position of the wire group 7b to that of the wire group 7a is longer than "transposition length" D. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a dislocation method of a conductive coil used for electrical equipment and the like, and particularly to superconducting equipment, and a conductive coil using the same.

  Conventionally, in a superconducting coil that needs to pass a large current, for example, a plurality of tape-like wire rods that are high-temperature superconductors are used in an overlapping manner. When a plurality of tape-shaped wire rods are stacked and wound around a winding frame, since the impedance varies depending on the winding position (stacking position) of each tape-shaped wire rod, current does not flow uniformly through each tape-shaped wire rod. This is a problem particularly in a superconducting coil in which electrical resistance can be ignored. For this reason, when a plurality of tape-shaped wire rods are used in an overlapping manner, it is necessary to perform dislocation for changing the winding position of each tape-shaped wire rod.

  As such a superconductor dislocation method, for example, an annular groove is provided in the winding frame, the superconductor is wound along the groove, and the notch provided in the bank portion between the grooves is used as a crossing portion. There is a superconducting coil that performs dislocation at the transition part (Patent Document 1).

Japanese Patent Laid-Open No. 2003-115405

  However, the method as in Patent Document 1 only describes that the notch provided in the bank is used as a bridge, and that the transition is performed at the bridge, and the thickness of the bank is determined by winding a superconductor. I can't turn it on. The space where the superconductor cannot be wound is not only a wasteful space for the coil, but also leads to an increase in the coil height. There is a demand for a conductive coil that performs dislocation efficiently and has high winding efficiency.

  In particular, since the superconducting conductors corresponding to the groove width are wound in a row around the groove, dislocation is difficult by such a method when the superconducting conductor is wound in a plurality of rows.

  FIG. 6A is a diagram showing the dislocation portion 110 when a plurality of superconducting wires 111 are wound in a stacked manner by a conventional method. Usually, the superconducting wire 111 undergoes dislocation at the dislocation portion 110, and the winding position of the wire is switched. As shown in FIG. 6A, in the conventional dislocation portion 110, a space (X in the drawing) having a width corresponding to one row of the superconducting wire 111 is formed along with the dislocation. Therefore, a space where the superconducting wire 111 is not wound is generated by the number of times of dislocation.

  On the other hand, as shown in FIG. 6B, a method is conceivable in which the superconducting wire 111 is divided into two, and a plurality of superconducting wires 111a are overlapped to provide the wire groups 113a and 113b in parallel. The wire groups 113a and 113b are each formed by winding a plurality of tape-shaped superconducting wires 111a, and the wire groups 113a and 113b are adjacent to each other in the axial direction of the winding frame and independently of each other. Wound around a reel. By using a plurality of wire groups 113a and 113b, even if a thinner superconducting wire 111a is used, a winding volume equivalent to the case of using a thick superconducting wire (superconducting wire 111 in FIG. 6A) can be obtained. . However, in the normal dislocation method, as shown in FIG. 6 (b), even when divided into a plurality of wire groups (two in FIG. 6 (b)), the dislocation portion 110 has two superconducting wires 111a. Since a dislocation space (X in the figure) is required, the winding efficiency could not be improved.

  The present invention has been made in view of such problems, and in the case of winding a conductive wire into a plurality of wire groups, the dislocation space is minimized, the winding efficiency of the conductive wire around the winding frame is increased, and the conductive coil It is an object of the present invention to provide a conductive coil dislocation method and a conductive coil that can be reduced in size and thereby reduce the vertical magnetic field applied to the conductive wire, thereby increasing the energization current and reducing the AC loss.

In order to achieve the above-described object, the first invention is a method for disposing a conductive coil in which a conductive wire material, which is a tape-like superconducting wire material, is wound around the outer periphery of a winding frame in a plurality of spirals. A plurality of wires are wound in the radial direction of the winding frame to form a conductive wire group , a plurality of the conductive wire groups are arranged in the width direction, and wound around the winding frame so as to be adjacent to each other. the dislocation starting position of the conductive wire group respectively, a winding periphery adjacent to each other in the axial direction of the bobbin, and disposed at positions displaced from each other in the circumferential direction of the bobbin, dislocations in the conductive wire within the group The conductive wire wound around the uppermost stage of the conductive wire group is wound around the winding frame by shifting by one row in the reel axis direction, and the dislocation is placed on the conductive wire wound around the uppermost stage. Before the second row Conductive wire wound around the uppermost stage in the conductive wire group is a displacement length in the circumferential direction of the winding frame of the dislocation start of each adjacent conductive wire group is shifted and overlapped The conductive coil dislocation method is characterized in that it is larger than the length between the shift start position of the wire and the shift start position of the conductive wire wound around the second stage or less.

  It is desirable that the conductive wire widths of the plurality of adjacent conductive wire groups are substantially equal.

  In the winding circumference in which the dislocation portions of the adjacent conductive wire groups do not overlap in the circumferential direction of the winding frame and the dislocation is performed, the adjacent conductive wire groups have a width corresponding to one of the conductive wires. It is desirable that the wire is wound with only a gap substantially equal to.

  According to the first invention, a conductive wire group is formed in which a plurality of conductive wire rods are wound in layers, the plurality of conductive wire rod groups are wound adjacent to each other, and the dislocation start position of each conductive wire rod group is a circumference. Since they are displaced in the direction, the dislocation space can be reduced. The effect is particularly great if the conductive wire is a tape-like superconducting wire. In this case, if a plurality of tape-shaped superconducting wires are arranged in the width direction to form a wire group, the width per superconducting wire can be reduced, so that the winding efficiency can be further increased.

  In particular, if the shift width of the dislocation start position of each conductive wire group is larger than the length between the shift start positions of the wire in the wire group (dislocation length), the dislocation parts do not overlap each other, so the dislocation space is surely Can be reduced. Further, if the conductive wire widths of the plurality of wire groups are the same, the dislocation space reduction effect is great.

  In the dislocation portion, the conductive wire groups do not overlap each other, and if only the width of one conductive wire is used as the dislocation space, extremely high winding efficiency can be obtained. In this case, in particular, by dividing and winding the conductive wire into a large number of wire groups in the width direction, the width per wire can be reduced, so that the effect is greater.

  2nd invention is manufactured using the dislocation method of the conductive coil concerning 1st invention, It is a conductive coil characterized by the above-mentioned.

  According to the second invention, by reducing the dislocation space, the axial length of the conductive coil can be shortened, whereby a compact conductive coil can be obtained.

  According to the present invention, when a conductive wire is wound as a plurality of wire groups, the dislocation space is minimized, the winding efficiency of the conductive wire around the winding frame is increased, the conductive coil is reduced in size, and thereby the conductive wire is obtained. It is possible to provide a conductive coil dislocation method and a conductive coil that can reduce the vertical magnetic field of the coil, increase the energization current, and reduce the AC loss.

The figure which shows a superconducting coil. It is a figure which shows the dislocation state of the superconducting wire 5 in the dislocation part 9, (a) is a perspective view, (b) is the A section enlarged view of (a). The figure which shows the replacement state of the winding position of the superconducting wire in the dislocation part. It is a figure which shows each wire rod group 7a, 7b dislocation position in the dislocation | rearrangement part 9, (a) is the figure seen from the winding upper stage direction of each wire rod group, (b) is the figure seen from the winding side of the wire rod group 7a. The figure which shows each wire group 7a, 7b, 7c dislocation position in the dislocation part 9. FIG. The figure which shows the conventional dislocation method.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a superconducting coil 1 as a conductive coil. Superconducting coil 1 is mainly composed of winding frame 3, superconducting wire 5 and the like.

  The winding frame 3 is a cylindrical member made of an insulating material. A superconducting wire 5 is wound around the outer periphery of the winding frame 3. The superconducting wire 5 as the conductive wire is, for example, a tape-shaped oxide superconductor. A plurality of superconducting wires 5 are wound around each other. In this way, a structure in which a plurality of superconducting wires 5 are wound is hereinafter referred to as a “wire group” of superconducting wires.

  In superconducting coil 1, two groups of wire groups 7a and 7b are wound adjacent to each other. That is, the superconducting wire 5 wound around the wire group 7a, 7b is obtained by dividing the wide superconducting wire wound around as one wire group into two. Therefore, a plurality of superconducting wires 5 are spirally wound around the winding frame 3 so that the wire groups 7a and 7b are adjacent to each other. It is desirable that the superconducting wires 5 wound around the wire groups 7a and 7b have the same width. That is, it is desirable to divide the wide base material into equal parts.

  Since the superconducting wire 5 is overlapped and wound around the wire groups 7a and 7b, the impedance differs depending on the overlapping position. In the superconducting material, since the electric resistance can be ignored, it is strongly influenced by this impedance, and the amount of current flowing depending on the overlapping position of the superconducting wire 5 becomes non-uniform. Therefore, in the wire rod groups 7a and 7b, the dislocation portion 9 provided for each predetermined number of windings performs a dislocation that switches the upper and lower superconducting wire winding positions of the wire rod groups 7a and 7b.

  In the winding circumference where the dislocation portion 9 is formed, a gap in which the superconducting wire 5 (wire group 7a, 7b) is not wound is generated along with the dislocation. This gap is hereinafter referred to as a dislocation space. That is, dislocation spaces 10 are formed in the superconducting coil 1 by the number of dislocation portions 9.

  2 and 3 are diagrams showing the dislocation part 9, FIG. 2 (a) is a perspective view showing a replacement state of the superconducting wire 5 in the wire group 7a, 7b in the dislocation part 9, and FIG. 2 (b) is a diagram. It is the A section enlarged view of 2 (a). FIG. 3 is a diagram showing the replacement of the winding position of the superconducting wire 5 in the wire group 7a, in which the upper part in the figure shows the uppermost winding position and the lower part in the figure shows the lowest winding hook position. .

  As shown in FIG. 2 (b), the superconducting wire 5 in the wire group 7a in the state before reaching the dislocation portion 9 is, for each overlapping position, from the wire A (101a) to the wire G (107a) from the top to the bottom. To do. Similarly, although not shown, also in the wire group 7b in a state before reaching the dislocation portion 9, the superconducting wire 5 at each overlap position is changed from the wire A (101b) to the wire G (107b) from the upper stage to the lower stage. To do.

  In the dislocation portion 9, first, for example, the wire A (101b) wound around the uppermost stage of the wire group 7b is shifted to the side (winding direction) of the wire group 7b and is wound on the winding frame 3 (FIG. 1). Wrapped. Next, the wire B (102b) to the wire G (107b) excluding the wire A (101b) are stacked while being shifted above the wire A (101b). In this state, the wire B (102b) to the wire G (107b) of the wire group 7b are shifted away from the wire group 7a.

  Furthermore, the wire A (101a) wound around the uppermost stage of the wire group 7a is shifted in the direction of the wire group 7b (winding direction) and wound around the winding frame 3 (FIG. 1). Next, the wire B (102a) to the wire G (107a) excluding the wire A (101a) are stacked while being shifted above the wire A (101a).

  That is, in the dislocation portion 9, as shown in FIG. 3, the uppermost wire A moves to the lowermost stage, and the wires B to G are put on the wire A moved to the lowermost as they are. Therefore, in the dislocation portion 9, the wire rods are exchanged within the wire rod group.

  In the present embodiment, the wire group 7a, 7b is an example of seven layers of the wire A to the wire G, but the present invention is not limited to this, and a plurality of superconducting wires 5 are wound. Any number of sheets can be used.

  Next, the dislocation position of each wire group 7a, 7b in the dislocation portion 9 will be described. 4A is an enlarged view of the dislocation portion 9 in FIG. 1, and FIG. 4B is a view of the B portion in FIG. 4A viewed from the side (axial direction of the reel 3). .

  As described above, the wire groups 7a and 7b are wound around the winding frame 3 adjacently and independently. Assuming that the winding circumference of the wire group 7a is... N-1, n, n + 1... And the winding circumference of the wire group 7b is ... m-1, m, m + 1. As shown in a), the wire rod groups 7a and 7b are alternately wound around the winding frame 3 in the order of n-1, m-1, n, m, n + 1, m + 1,. .

  First, a dislocation is performed from the wire group 7b of the winding circumference m located in the winding direction with respect to the winding frame 3 (assumed to be wound from the upper side to the lower side (and from the left side to the right side in FIG. 4)). As described above, the uppermost wire rod A (101b) is wound around the lowermost wire while being shifted in the winding direction of the wire rod group 7b. After the wire A (101b) is completely wound around the lowermost stage (that is, the winding frame 3), the remaining wire B to wire G are shifted and placed on the wire A.

  Therefore, as shown in FIG. 4B, the uppermost wire A (101b) moves to the lowermost stage, and the wire B (102b) located below the wire A (101b) before the dislocation moves to the uppermost stage. Moving. Moreover, the wire G (107b) which was the lowest step before the dislocation moves to the wire A (101b).

  Here, the length from when the uppermost wire A (101b) starts to be shifted to the side until the remaining wires B (102b) to G (107b) are moved onto the wire A (101b) (being shifted). (Arrow D in the figure) is hereinafter referred to as “dislocation length”. That is, the “dislocation length” refers to the shift width of the shift start position of the uppermost stage and other wire rods within the dislocation of one wire group.

  After shifting of the wire rod B (102b) to the wire rod G (107b) of the wire rod group 7b onto the wire rod A is started, dislocation of the wire rod group 7a of the adjacent winding circumference n is performed in the same manner as the wire rod group 7b. As described above, the winding circumference n is adjacent to the winding circumference m in the axial direction of the winding frame 3. Here, the circumferential shift length (arrow C in the figure) from the dislocation start position of the wire group 7 b to the dislocation start position of the wire group 7 a is longer than the “dislocation length” D. That is, the circumferential shift width of the dislocation start position of each adjacent wire group is longer than the “dislocation length”. Therefore, the wire constituting the wire group 7a does not overlap with the wire constituting the wire group 7b.

  In the dislocation portion 9, a dislocation space (E in the figure) is formed between the wire group 7a and the wire group 7b. In FIG. 4A, a dislocation space is formed between the winding circumference m-1 and the winding circumference n or between the winding circumference m and the winding circumference n + 1.

  In the present invention, the wire groups 7a and 7b are formed independently, and in the adjacent winding circumference, the respective dislocation start positions are shifted in the circumferential direction, so the wire groups do not overlap each other. The dislocation space has only a width substantially equivalent to the width of the superconducting wire 5.

  As described above, according to the superconducting coil 1 according to the present embodiment, the wire groups 7a and 7b around which a plurality of superconducting wires 5 are stacked and wound are wound so as to be adjacent to each other in the axial direction of the winding frame 3. Since the dislocation start position in each wire group 7a, 7b is shifted in the circumferential direction, the dislocation space can be reduced.

  In particular, since the shift width in the circumferential direction of the dislocation start position of each of the wire groups 7a and 7b is larger than the “dislocation length”, the dislocation portions of each wire group do not overlap each other. For this reason, the dislocation space can be limited to the width of only one superconducting wire 5, and extremely high winding efficiency can be obtained.

  Moreover, since the axial length of the superconducting coil 1 can be shortened by reducing the dislocation space, a compact superconducting coil 1 can be obtained.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, in the present embodiment, an example in which a tape-shaped superconducting wire is used as the conductive wire has been described. That is, a conductive wire other than the superconducting wire may be used, and its form is not limited. In the present embodiment, the case of two groups of wire rod groups 7a and 7b (that is, the case where the base wire rod is divided into two) is shown, but the present invention is not limited to this. FIG. 5 is a diagram showing the dislocation portion 9 ′ in the case of three groups of wire rod groups 7 a, 7 b, and 7 c.

  Even when the number of wire groups is three (that is, when the base wire is divided into three), the wire group 7c is similarly dislocated and the wire group 7b adjacent to the wire group 7c is dislocated. At this time, the shift width C ′ of the dislocation start position in the circumferential direction of the wire groups 7 c and 7 b may be made longer than the “dislocation length” of each wire group. Similarly, the shift width C ″ of the dislocation position in the circumferential direction between the wire group 7b and the wire group 7a adjacent thereto may be made longer than the “dislocation length” of each wire group.

  By doing in this way, each dislocation part of wire group 7a, 7b, 7c is performed by the winding circumference which adjoins the reel axis direction, and the dislocation start position has shifted in the peripheral direction, and does not overlap mutually. Therefore, the dislocation space is only the width of one superconducting wire 5. Thus, the number of groups of wire rod groups may be any number as long as dislocation of all wire rod groups can be completed within the same lap (within the same lap of each of the adjacent wire rod groups).

  Moreover, you may perform all the dislocations which replace all the wires in a wire group in the approximate center position of a superconducting coil axial direction. For example, the overlapping positions of A, B,..., F, G may be switched from G, F,.

1 ... Superconducting coil 3 ... Winding frame 5 ... Superconducting wire 5
7a, 7b, 7c ......... Wire group 9 ......... Dislocation portion 10 ......... Dislocation space 110 ......... Dislocation portion 111 ......... Superconducting wire 113a, 113b ......... Wire group

Claims (4)

A conductive coil dislocation method in which a conductive wire, which is a tape-like superconducting wire, is wound around the outer periphery of a winding frame in a spiral shape,
A plurality of the conductive wire materials are wound in a plurality of times in the radial direction of the winding frame to form a conductive wire material group,
A plurality of the conductive wire groups are arranged in the width direction , wound around the winding frame so as to be adjacent to each other,
The dislocation start position of each of the adjacent conductive wire group is a winding circumference adjacent to each other in the axial direction of the winding frame, and provided at a position shifted from each other in the circumferential direction of the winding frame,
The dislocation within the conductive wire group is wound around the reel by shifting the conductive wire wound around the uppermost stage of the conductive wire group by one line in the reel axis direction and wound around the uppermost stage. It is done by shifting and overlapping the conductive wire wound around the second row before the dislocation on the conductive wire that had been
The shift length in the circumferential direction of the winding frame of the dislocation start of each adjacent conductive wire group is the shift start position of the conductive wire wound around the uppermost stage in the conductive wire group and the second and lower stages. A conductive coil dislocation method characterized in that it is larger than the length between the shift start position of the conductive wire wound around the wire. The conductive coil dislocation method according to claim 1 , wherein the conductive wire widths of the plurality of adjacent conductive wire groups are substantially equal. In the winding circumference in which the dislocation portions of the adjacent conductive wire groups do not overlap in the circumferential direction of the winding frame and the dislocation is performed, the adjacent conductive wire groups have a width corresponding to one of the conductive wires. approximately equal dislocation method of the conductive coil according to claim 1 or claim 2, characterized in that the wound open only gap. A conductive coil manufactured using the conductive coil dislocation method according to any one of claims 1 to 3 .

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