JPH08203720A - Multilayer coil and winding method thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a multilayer coil whose shape is substantially symmetrical in the left-right direction or the vertical direction and a winding method thereof. When winding a conducting wire 3 around a winding jig 1 composed of a winding shaft having at least two facing surfaces and a collar portion 5 provided on the left and right of the winding shaft, the wire diameter of the conducting wire is set on the facing two surfaces. Align winding is performed while feeding 1/2 pitch. As a result, a multilayer coil that is substantially symmetrical in the left-right direction or the up-down direction is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer coil and its winding method.

[0002]

2. Description of the Related Art When performing an aligned winding on a bobbin, which is a jig for winding, it is necessary to perform winding without gaps between conductors.
Feed the wire along the axial direction of the bobbin by an amount equal to the diameter of the wire per rotation. Then, even after the winding of one layer is completed and the winding is turned back at the end of the bobbin, the same amount of feed is applied in the opposite direction along the axial direction of the bobbin in an amount equal to the diameter of the conductor wire per rotation.

By the way, when a conductor is wound from one layer to an upper layer at the end of the bobbin, it is wound so that the upper conductor is guided in the groove between the lower conductors. By doing so, the next layer is also wound by feeding with a feed equal to the diameter of the conductor wire per rotation, so that the conductor wire of the upper layer is wound in the groove between the conductor wires of the lower layer to perform the aligned winding.

Generally, as a method of feeding the wire equal to the diameter of the conductor per rotation, a method of continuously feeding (continuous feeding) and a method of feeding within a certain range during one rotation, and feeding otherwise There is a method that does not (intermittent feed).

The continuous feed has a drawback that it is easy to feed, but a gap is easily formed between the conductors, so that it is possible to carry out an aligned winding up to several layers, but the alignment is often disturbed in several layers close to the final winding. . In order to prevent this, there are cases where a groove for guiding the conductor is provided on the outer circumference of the bobbin.
No. 6538), there is a problem that the cost of the bobbin increases and that it is not possible to cope with a change in wire diameter or a case of a thin wire.

On the other hand, the intermittent feed is advantageous in that it does not have the above-mentioned drawbacks, but it is necessary to increase the feed rate. Therefore, conventionally, when performing intermittent feeding, a cam mechanism capable of relatively high-speed feeding is used, and a mechanical mechanism that does not cause a delay in rotation and feeding of the bobbin has been adopted. However, even with such a mechanism, there has been a problem that it is not possible to cope with a further increase in speed required in recent years. For this reason, recently, high-speed response servo control has appeared, and by using it, high-speed intermittent feed aligned winding is possible.

A conventional intermittent feed alignment winding method is, for example, 4
When winding on a rectangular bobbin, it was customary to feed the wire diameter on one of the four surfaces. In this case, the last 3
On the plane, do not send. By doing so, winding can be performed without gaps between the conductors, and aligned winding is possible.
In the second layer, as described above, the conductor wire is guided and wound in the groove formed between the conductor wires of the first layer. That is, the groove between the conductors serves to guide the conductor in the upper layer. Therefore, it is a prerequisite for perfect alignment winding that the first layer is aligned winding with no gap.

[0008]

In the above-described aligned winding, when the conductor wire is transferred from the lower layer to the upper layer, a portion where the conductor rides on the upper portion of the lower conductor wire, that is, a so-called cross portion occurs. Then, the conductive wire rides on the upper part of the lower conductive wire, and is guided to the groove formed between the lower conductive wires to be wound to form the upper layer.

However, in the multi-layer coil according to the conventional aligned winding method as described above, there is always one riding portion (cross portion) on one circumference of the coil, and this portion is larger than other coil winding portions. And bulge outside.

Where the bulge affects the characteristics of the coil, the problem is where to bring the cross section. For example, Japanese Utility Model Publication No. 63-22645 discloses a technique in which a cross portion is provided in a portion that does not affect the characteristics of the coil while avoiding the portion that contributes to the torque of the bobbinless motor coil. But
Since the conducting wire runs from the lower layer to the upper layer at one place on the outer circumference of the coil, it is unavoidable that the conducting wire becomes thick only in that portion and becomes an asymmetrical shape as a coil.

Depending on the coil, due to characteristics, assembly work,
In addition, although it is desired that the coil has a symmetrical shape from the viewpoint of appearance, the above-described conventional technique cannot form the coil in a symmetrical shape.

The present invention has been made in view of the above circumstances, and provides a multilayer coil and a winding method thereof in which one pair of cross parts of the coil are provided on the outer peripheral part of the coil so that the coil shape is substantially symmetrical in the left-right direction or the up-down direction. It is intended to be provided.

[0013]

In order to achieve the above object, the present invention provides a multi-layered structure in which a conductive wire is wound in a line and has at least two opposing faces. In the coil, a cross portion of each layer is provided on the two opposing surfaces.

According to a second aspect of the present invention, the opposing two
The faces are characterized in that they are parallel to each other.

According to a third aspect of the present invention, there is provided a multi-layer coil winding method in which a conductor is wound around a winding jig having a winding shaft having at least two opposing surfaces and a flange portion provided on the left and right of the winding shaft. It is characterized in that the two facing surfaces are alignedly wound while being fed by 1/2 pitch of the wire diameter of the conducting wire.

[0016]

According to the present invention, since a pair of cross portions is provided on the surfaces facing each other, the multilayer coil has a shape which is substantially symmetrical in the left-right direction or in the vertical direction. Good coil characteristics. As a result of the method, the rotation speed of the winding jig, which is convenient for assembly, can be increased.

[0017]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a multi-layer coil according to the present invention is wound around a bobbin.
Is a front sectional view, (b) is a left side view, (c) is a plan view,
(D) is a right side view and (e) is a bottom view. In the figure, reference numeral 1 is a bobbin which is a winding jig, and 2 is a multi-layer coil wound around the bobbin 1. The bobbin 1 includes a winding shaft 4 having a square cross section around which a conductive wire 3 is wound, and the winding shaft 4
Left and right flanges 5, 5 provided concentrically with the winding shaft 4 on the left and right sides of the
It consists of

The multi-layer coil 1 is formed by winding the conductive wire 3 in multiple layers by means of aligned winding. Each layer 2 constituting the multilayer coil 1
A so-called cross portion C where the lower-layer conductive wire 3 rides on the upper portion is provided at approximately the center of the parallel left and right side portions of a, 2b, ... Further, no cross portions are provided in the portions constituting the upper and lower surfaces of each of the layers 2a, 2b, ..., And the conducting wires 3 extend straight in parallel with each other.

.. of the upper and lower surfaces of each of the layers 2a, 2b, ... Are deviated in the axial direction of the bobbin 1 by ½ of the diameter of the conductive wire 3. That is, FIG.
As can be seen by comparing (c) and (e), for example, the top surface of the innermost layer of the multilayer coil 2 is provided with five conducting wires, while the bottom surface of the innermost layer of the multilayer coil 2 is four. Has been done.

Next, a method of winding the multilayer coil 2 shown in FIG. 1 will be described. First, as shown in FIG. 2, the conductive wire 3 is wound around the outer circumference of the winding shaft 4 of the bobbin 1 to form the first layer 2a. At this time, as shown in FIGS. 1 and 2, when winding the conducting wire 3 around the left and right side surfaces of the winding shaft 4 of the bobbin 1, each of the conducting wires 3 has a diameter of 1 of the diameter of the conducting wire 3 in the axial direction of the bobbin 1.
This is so-called intermittent feed, which feeds only 1/2 pitch.

When the wire 3 is raised from the first layer to the second layer at the end of the bobbin at the end of winding the first layer, the wire is fed in the opposite direction by 1/2 pitch of the wire. . Also in this case, the feed is applied only to the left and right side surfaces of the winding shaft 4 of the bobbin 1. By doing so, the first conductor wire 3 of the second layer is guided in the groove between the conductor wires 3 of the upper and lower opposing portions of the first layer. After that, as in the case of the first layer, half the wire diameter is fed on the opposite left and right side surfaces during one rotation. Thereby, as shown in FIG. 3, the conductor wire 3 is wound in the groove between the conductor wires 3 of the first layer to obtain the second layer 2b. Hereinafter, by repeating this, the multilayer coil 2 as shown in FIG. 1 is obtained.

However, in the multilayer coil 2 having the above structure,
Since the cross portions C are provided on both side surfaces facing each other,
The multilayer coil 2 has a bilaterally symmetrical shape. Therefore,
The characteristics are excellent, and the assembling work is easy when the components are incorporated into a motor or the like. In addition, it is preferable in terms of appearance. Also, when used in transformers, microwave coils, etc., left and right. Since the top and bottom are well balanced, it is advantageous in terms of assembly space and also improves the characteristics.

The present invention is not limited to the above-mentioned embodiment, and the specific constituent elements such as the shape, material, size and construction procedure of each member can be appropriately changed in practice.
For example, in the above embodiment, the case where the stator coil of the brushless DC motor is manufactured has been described as an example.
The present invention is not limited to this, and of course, the present invention can be applied to the case of manufacturing a coil used for other purposes. Also,
The coil shape is not limited to the quadrangular shape, and can be applied to the case of forming a circular shape or a fan shape. In short, it is sufficient if the shape has two opposing surfaces and can be substantially symmetrical in the left-right direction or the vertical direction. .

[0024]

As described above, according to the multilayer coil of the first aspect, since the cross portions are provided on both side surfaces facing each other, the multilayer coil has a bilaterally symmetrical shape.
Therefore, the characteristics are excellent, and the assembling work when incorporating it into a motor or the like as a component is facilitated, and in addition, it is preferable in terms of appearance.

According to the multi-layer coil of the second aspect, since the two opposite surfaces are parallel to each other, it is easy to feed the conductor wire by 1/2 pitch of the wire diameter when winding the conductor wire. become.

According to the multi-layer coil winding method of the third aspect of the invention, since the winding is performed in line while feeding the opposite two surfaces by 1/2 pitch of the wire diameter of the conducting wire, it is symmetrical in left and right direction or vertically. A multilayer coil can be easily obtained. Further, as compared with the conventional case of performing the intermittent feed in which the wire diameter of the conductor wire is fed by one pitch, the feed is easier and the speed can be further increased.

[Brief description of drawings]

FIG. 1 is an explanatory view of a multilayer coil showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a step of a winding method of the multilayer coil.

FIG. 3 is a perspective view showing steps of the winding method of the multilayer coil.

[Explanation of reference numerals] 1 winding jig (bobbin) 2 multi-layer coil 3 conducting wire 4 winding shaft 5 collar portion C cross portion

Claims (3)

[Claims] 1. A multi-layer coil in which a conductive wire is wound in a line and is wound in multiple layers so as to have at least two opposing surfaces, wherein a cross portion of each layer is provided on the opposing two surfaces. Multilayer coil. 2. The multilayer coil according to claim 1, wherein the two opposing surfaces are parallel to each other. 3. A winding method for a multi-layer coil, wherein a conducting wire is wound around a winding jig consisting of a winding shaft having at least two surfaces facing each other and flanges provided on the left and right of the winding shaft, the two facing surfaces being opposed. A winding method for a multi-layer coil, characterized in that the winding is performed in a line while feeding the wire at a pitch of 1/2 of the wire diameter.