JP2840721B2 - Winding method of saddle coil - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of winding a saddle coil whose longitudinal direction extends in an arc shape.

[Related Art] For example, when a superconducting magnet is to be obtained using a superconducting wire, a winding technique for forming a coil made of the superconducting wire is required. On the other hand, in such a superconducting coil, it may be necessary to wind the coil in a saddle-shaped configuration depending on the application.

The winding method of a saddle coil whose longitudinal direction extends linearly is as follows:
It is almost established and is implemented, for example, as shown in FIG. That is, a saddle-shaped bobbin 1 is prepared to give the coil a saddle-shaped shape. The winding core 2 is positioned on the bobbin 1 and fixed by a suitable means.
In this state, a wire 3 made of, for example, a superconducting material is wound around the core 2 along the core 2, thereby forming a coil 4. At this time, in order to adjust the shape of the coil 4, the arrow 6
As shown by, the wire 3 is pressed from the outside. The pushing jig 5 is slidably held on the bobbin 1 in order to adapt to the external dimensions of the coil 4 which increases as the winding of the wire 3 proceeds.

[Problem to be Solved by the Invention] The winding method described above is for obtaining a saddle-shaped coil whose longitudinal direction extends linearly. Therefore, even if this winding method is applied as it is, a saddle-shaped coil whose longitudinal direction extends in an arc cannot be obtained.

The arc-shaped saddle coil described above is advantageously used, for example, in a bending magnet for cyclotron. In order to obtain such an arc-shaped saddle coil, it is necessary to use a core extending in an arc shape in the longitudinal direction while using a seventh core.
It is simply considered that instead of the linear bobbin 1 shown in the figure, a bobbin whose longitudinal direction extends in an arc may be used.

However, in order to align the wires 3 so that the coil 4 is formed while pushing the wires 3 from only the side surfaces and pressing the jigs 5 by substantially the same method as shown in FIG. 3 requires relatively high rigidity, and therefore, a tape-shaped wire or a keystone-type wire having a width of about 10 to 20 mm is generally used. For example, about 1m in diameter
It is difficult to obtain an arc-shaped saddle coil using a wire rod as thin as about m by a method substantially similar to that shown in FIG. That is, when the winding is carried out by using only such a thin wire and pressing the wire from the side of the wire with the pushing jig 5 as shown in FIG. 7, the wire may be crushed or the already wound wire may be removed. Get over. This will be described with reference to FIG.

FIG. 8 schematically shows a state in which a wire 3a is wound around an arc-shaped core 2a. On the outer peripheral side of the winding core 2a, tension as shown by arrows 7 and 8 acts on the wire 3a, and their combined tension is represented by arrow 9. On the other hand, on the inner peripheral side of the winding core 2a, a tension as shown by arrows 10 and 11 acts on the wire 3a, and the resultant tension is represented by an arrow 12. These combined tension 9 and
As can be seen from the direction 12, especially on the inner peripheral side of the core 2a, the combined tension 12 in the direction of lifting the wire 3a from the core 2a acts, and the alignment of the wire 3a is more likely to be disturbed.

Therefore, according to the present invention, even if the wire is thin, the wire can be applied while maintaining a proper alignment state.
An object of the present invention is to provide a method of winding a saddle coil whose longitudinal direction extends in an arc shape.

[Means for Solving the Problems] As described above, the present invention is directed to a winding method of a saddle coil whose longitudinal direction extends in an arc shape,
In order to solve this technical problem, the method includes the following steps. That is, the winding core extending in the arc direction in the longitudinal direction is positioned on the saddle-type winding frame extending in the arc shape in the longitudinal direction so that the respective longitudinal directions are aligned, and the core should be wound around the core. A holding jig is arranged so as to face the winding frame so as to form a space for one layer of the wire, and in this state, the wire is wound around the winding core.

The space for one layer of the wire to be wound around the core is initially formed by a holding jig and a bobbin.
If the wire is wound in multiple layers, this space is formed by the holding jig and the already wound wire layer.

In addition, as described above, when the wire is wound in multiple layers, it is preferable that the insulating sheet be disposed on the already wound wire.

[Operation] In the present invention, the wire to be wound is wound around the core while being received in the space of one layer of the wire regulated by the holding jig.

[Effects of the Invention] Therefore, according to the present invention, since the holding jig forms only a space for one layer of the wire to be wound around the core, the wire wound around the core is: While being regulated by the holding jig, it can be wound while being aligned in the space.

When the wire is to be wound in multiple layers, a space for one layer of the wire to be wound around the core is formed between the holding jig and the already wound wire layer. At this time, if the insulating sheet is arranged on the already wound wire layer, the unevenness formed on the surface of the already wound wire layer can be eliminated. Therefore, the friction between the already wound wire layer and the wire to be wound is reduced, thereby enabling a smooth winding operation and the insulating coating formed on the surface of the wire. Without any damage,
Further, the insulation sheet itself can provide more complete insulation.

In addition, the wire wound by the method according to the present invention is preferably fixed with an adhesive in order to prevent the aligned state from being destroyed in subsequent handling and the like. As the adhesive, a quick-drying adhesive, a self-fusion resin, or the like is advantageously used.

[Embodiment] FIGS. 1 and 2 show an embodiment of the present invention. This embodiment relates to a winding method of a two-pole saddle coil. FIG. 1 shows a plan view, and FIG. 2 shows an end view of a cut section along line II-II in FIG. I have.

First, a winding core 21 whose longitudinal direction extends in an arc shape is prepared. Also, a saddle-type bobbin whose arcuate shape extends in the longitudinal direction.
22 are prepared. The center angle of each of the winding core 21 and the winding frame 22 with respect to the arc formed by each is selected to be about 90 degrees. The core 21 is positioned just above the winding frame 22 so that the longitudinal directions thereof are aligned. Although not shown, this positioning state is fixed by appropriate fixing means.

In order to form the coil 20, a wire 23 such as a superconducting wire is wound around the core 21. The superconducting wire used is preferably a flexible alloy-based material, but may be another material-based superconducting wire. Instead of a superconducting wire, a normal conducting wire may be used as the wire 23. As the wire 23, a thin wire having a diameter of about 1 mm is used.

As described above, when the wire 23 is wound around the core 21, the holding jig 25 faces the reel 22 so as to form a space 24 for one layer of the wire 23 to be wound. Are arranged as follows. As shown in FIG. 2, the holding jig 25 has an inner peripheral surface 27 similar to the outer peripheral surface 26 of the winding frame 22 having an arc-shaped cross section.
The space 24 for one layer is formed between the outer peripheral surface 26 and the inner peripheral surface 27. Also, presser jig 25
A groove 28 is formed, and the core 21 is received in the groove 28, so that the holding jig 25 is positioned with respect to the core 21.

In this way, the wire 23 is wound around the core 21 while being pushed into the space 24 for one layer with a relatively small force. At this time, since movement of the wire 23 is regulated by the outer peripheral surface 26 of the winding frame 22 that defines the space 24 and the inner peripheral surface 25 of the holding jig 25, the wire 23 rides on the already wound portion of the wire 23. I will not raise it. Therefore, a saddle coil 20 including the wire 23 wound in an appropriate alignment state is obtained. Such wire rod
After the winding of the wire 23 is completed, the state may be fixed by, for example, an anaerobic and quick-drying adhesive in order to maintain the aligned state of the wires 23.

Instead of using a quick-drying adhesive as described above,
A self-fusing resin is applied to the wire 23 in advance, and after winding, is heated to a temperature at which self-fusing can be performed.
The twenty forms may be fixed. As the wire 23
When using a superconducting wire, the heating temperature is
It is important to select a temperature within a range that does not degrade the performance of the superconducting wire.

When the above-described steps have been completed, the core 21 is removed from the holding jig 25 and the bobbin 22, whereby the two-pole saddle coil 20 composed of the bobbin 22 and a wire 23 wound around the bobbin 22.
Is obtained.

The wire can be wound in multiple layers, as shown in FIG. FIG. 3 is a diagram corresponding to FIG. 2 described above.

After the winding of the first layer of the wire 23 is completed, the holding jig 25 shown in FIG. 2 is replaced with another holding jig 25a as shown in FIG. The holding jig 25a has an inner peripheral surface 27a having a smaller curvature, that is, a larger radius of curvature than the inner peripheral surface 27 of the holding jig 25. The space 24a for one layer of the wire 23 to be wound is formed between the outer peripheral surface 29 and the inner peripheral surface 27a of the first layer of the wire 23. Further, the holding jig 25a includes a groove 28a for receiving the winding core 21, similarly to the holding jig 25.

In this manner, the second layer of the wire 23 is wound around the core 21 and the inner peripheral surface 27a of the holding jig 25a and the first layer of the wire.
This is performed in a space 24a formed between the outer peripheral surface 29 of the 23 and the surface 29.

Thereafter, when the lamination of the wire rods 23 is further repeated, the winding of the wire rods 23 is performed one layer at a time while being sequentially changed to a holding jig having an inner peripheral surface having a curvature suitable for each lamination stage.

As described above, in the case where the wound wire 23 is formed into a multilayer, for example, as shown in FIG.
Since the surface 29 on the outer peripheral side of 23 has irregularities, relatively large friction occurs with the wire 23 to be wound from now on, and the insulating coating of the wire 23 may be damaged. In order to solve this, as shown in FIG. 4, it is preferable to arrange the insulating sheet 30 on the layer of the already wound wire 23.

FIG. 4 shows a third-layer wire rod 23 using a holding jig 25b.
Is shown in the middle of winding. In FIG. 4, parts corresponding to the parts shown in FIG. 2 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 4, when the insulating sheet 30 is used, a space 24b for one layer of the wire 23 to be wound around the core 21 is formed.
Is formed between the insulating sheet 30 and the inner peripheral surface 27b of the holding jig 25b. Therefore, the existence of the insulating sheet 30 depends on the wire 23
Not only reduces the damage to the insulation coating of the
The winding operation of the wire 23 can be made smoother, and the insulation between the portions of the wire 23 can be more complete due to the insulation provided by the insulating sheet 30 itself.

5 and 6 show a winding method of the quadrupole saddle coil 31. FIG. Here, FIG. 5 is a perspective view showing a state in which the winding is performed, and FIG. 6 is a line VI-VI of FIG.
FIG. 4 is an end view of a cutting section along the line.

A saddle-shaped bobbin 32 whose longitudinal direction extends in an arc shape is prepared. The bobbin 32 has substantially the same shape as the bobbin 22 described above. On the inner peripheral side of the winding frame 32 and at a position shifted by 45 degrees from immediately above the winding frame 32, a winding core 33 whose longitudinal direction extends in an arc shape is positioned. At this time, the longitudinal direction of the core 33 and the longitudinal direction of the core 32 are aligned with each other.

The core is positioned such that the plurality of holding jigs 34 face the winding frame 32.
Positioned relative to 33. The holding jig 34 has substantially the same shape as the holding jig 25 described above. That is, the holding jig 34 has an inner peripheral surface 35 extending in an arc shape, and the inner peripheral surface 35 provides a space 37 for one layer of the wire 36 to be wound around the core 33. In this example,
An insulating sheet 38 similar to the above-described insulating sheet 30 is used, and the space 37 is formed between the inner peripheral surface 35 and the insulating sheet 38. The holding jig 34 also has a groove 39 for receiving the core 33.

The operation of winding the wire 36 around the core 33 is the same as in the above-described embodiment.

The shapes of the winding frame, the winding core, the holding jig, and the like can be arbitrarily changed according to the form of the coil to be obtained.

For example, in the embodiment shown in FIGS. 5 and 6,
The winding work was performed by positioning the winding core 33 on the inner circumferential side from directly above the winding frame 32. Conversely, by positioning the winding core on the outer circumferential side from directly above the winding frame 32, May be performed.

In each of the embodiments described above, the central angle is almost 90 degrees.
Although the winding frame and the core in the form of a circular arc are used, winding may be performed using an arc-shaped winding frame and a core having a central angle of other sizes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a state in which a winding operation according to an embodiment of the present invention is being performed. FIG. 2 shows the line of FIG.
FIG. 2 is a sectional end view taken along the line II-II. FIG. 3 is a view corresponding to FIG. 2, and shows a state in which the wire 23 is wound in multiple layers. FIG. 4 is a view corresponding to FIG. 2 and shows a wound wire rod.
An embodiment in which an insulating sheet 30 is inserted between 23 layers is shown. FIG. 5 is a perspective view showing a state where a winding according to still another embodiment of the present invention is implemented. FIG. 6 is a sectional end view taken along line VI-VI of FIG. FIG. 7 is a perspective view showing a state in which a conventional method for winding a straight saddle coil is performed. FIG. 8 is a diagram for explaining a problem encountered in a method of winding a saddle coil whose longitudinal direction extends in an arc shape. In the figure, 20, 31 are saddle coils, 21, 33 are winding cores, 22, 32
Is a reel, 23 and 36 are wires, 24, 24a, 24b and 37 are spaces for one layer,
Reference numerals 25, 25a, 25b, and 34 denote holding jigs, and reference numerals 30 and 38 denote insulating sheets.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-108200 (JP, A) JP-A-62-147312 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01F 6/00

Claims (4)

(57) [Claims] 1. A winding method for a saddle-shaped coil whose longitudinal direction extends in an arc shape, wherein a winding core extending in an arc shape in a longitudinal direction is provided on a saddle-type winding frame extending in an arc shape in a longitudinal direction. The pressing jig is arranged so as to face the winding frame so as to form a space for one layer of the wire to be wound around the winding core. And winding a wire around the winding core. 2. A wire rod to be wound around the core.
The winding method for a saddle-shaped coil according to claim 1, wherein a space for the layer is formed by the holding jig and the winding frame. 3. A wire rod to be wound around the core.
The winding method for a saddle-shaped coil according to claim 1, wherein the space for the layer is formed by the holding jig and the layer of the already wound wire. 4. The method for winding a saddle coil according to claim 3, wherein an insulating sheet is disposed on the already wound wire layer.