JP2003045239A - Horizontal coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal coil that has a high productivity in manufacturing and an excellent insulating-tape loosening prevention performance when made into a manufactured product and, therefore, is capable of winding into a high quality electrical equipment coil. SOLUTION: The horizontal coil wire is made by providing an adhesive coated layer on the conductor and winding an insulating tape on the adhesive coated layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel lateral winding mainly used in transformers and the like. More specifically, the present invention relates to a horizontal winding in which an insulating tape is well adhered to a conductor.

[0002]

2. Description of the Related Art Horizontal windings are widely used as magnet wires for transformers and the like.

This type of horizontal winding is formed by winding an electrically insulating tape around a conductor.

Here, as the conductor, a rectangular conductor having a large cross-sectional area, such as a rectangular copper wire or a rectangular aluminum wire, is used.

On the other hand, a fiber tape, a synthetic resin tape or the like is used as the electric insulating tape. Here, the fibrous tape includes kraft paper tape, amine-treated kraft paper tape, and the like. Examples of synthetic resin tapes include aramid non-woven tape, polyethylene terephthalate tape, (hereinafter referred to as PET tape), polyethylene naphthalate tape (hereinafter referred to as PEN tape), polyphenylene sulfide tape (referred to as PPS tape), and the like.

[0006]

However, the above-mentioned conventional transverse winding is formed by simply winding the insulating tape on the conductor wire, and therefore there is almost no adhesion between the conductor wire and the insulating tape. .

For this reason, when the electric equipment coil of the transformer is wound using the long conventional horizontal winding, when the middle portion of the long conventional horizontal winding is cut, The insulating tape at the cut end of the winding may become loose or loose. In this way, the horizontal winding with loose or loose insulation tape has problems such as looseness of the insulation tape propagating along the longitudinal direction of the conductor wire, swelling of the insulation tape, and easy breakage of the insulation tape. It occurs frequently.

Therefore, when the conventional horizontal winding is cut, it is necessary to immediately fix the insulating tape at the cut end onto the conductor with an adhesive tape or the like.

On the other hand, attempts have been made to improve the adhesion between the conductor wire and the insulating tape in the conventional horizontal winding.

The first method for improving the adhesion between the conventional conductive wire and the insulating tape is to manufacture a heat-adhesive synthetic resin tape by first applying a heat-melting resin paint onto the synthetic resin tape, and then to improve its heat-adhesiveness. A synthetic resin tape is wound on a conducting wire, and finally an intermediate product in which a heat-adhesive synthetic resin tape is wound on the conducting wire is heat-treated at a high temperature to form a transverse winding of the final product.

The second method for improving the adhesion between the conventional conductive wire and the insulating tape is to manufacture a heat-adhesive synthetic resin tape by first laminating a heat-melting resin tape on the synthetic resin tape, and then heat-bonding the same. Of a synthetic resin tape wound around a conducting wire, and finally a heat-adhesive synthetic resin tape wound around the conducting wire is heat treated at a high temperature to form a transverse winding of the final product.

However, both the above-mentioned first method for improving the adhesion between the conductive wire and the insulating tape and the second method for improving the adhesion between the conventional conductive wire and the insulating tape require an expensive heat treatment apparatus and heat treatment step. As a result, there was a drawback that productivity was low. Moreover, it is necessary to strictly control the heat treatment temperature of the heat treatment apparatus within a narrow temperature range of the melting point of the heat-adhesive synthetic resin or more and the melting point of the base synthetic resin tape or less, and as a result, insufficient heat treatment or excessive heat treatment failure may occur. There was concern that it would occur frequently.

The present invention has been made in view of the above points, and the purpose thereof is to solve the above-mentioned drawbacks of the prior art, to have high productivity in manufacturing, and to obtain the product. It is an object of the present invention to provide a horizontal winding that has excellent anti-tapping properties of an insulating tape when used as a product, and can thereby wind a high quality electric device coil.

[0014]

The gist of the present invention is characterized in that an adhesive coating layer is provided on a conductive wire, and an insulating tape is wound around the adhesive coating layer. It is in the horizontal winding.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the horizontal winding of the present invention will be described.

In the present invention, the insulating tape is not limited in material, and for example, a synthetic resin tape such as PET tape or PE
N tape, PPS tape, polyimide tape, aramid non-woven fabric tape, etc. can be used, and kraft paper tape made of fiber material, amine-treated kraft paper tape, etc. can also be used.

The type of adhesive used in the present invention is not limited. For example, as the adhesive used in the present invention, one-pack type epoxy adhesive, two-pack type epoxy adhesive, acrylic resin adhesive, vinyl acetate resin adhesive, polyamide resin adhesive, thermoplastic polyester resin System adhesives, phenolic resin adhesives, and the like.

In the present invention, the method of applying the adhesive onto the flat conductor wire includes the method of applying the flat conductor wire by passing between the rolls of the adhesive coating rotary roll mechanism, and the method of applying the flat conductor wire to the felt-impregnated felt. A method of applying by passing it, a method of applying the flat conductive wire by passing through a mist-like spray of an adhesive, a method of dropping a liquid adhesive on the flat conductive wire, and the like can be used.

In the present invention, the surface of the rectangular conductor to which the adhesive is applied may be the entire surface of the rectangular conductor, the upper and lower flat surfaces, the left and right edge surfaces, and either one of the surfaces. But it's okay.

In the present invention, the coating amount of the adhesive coating layer is preferably 0.002 mg / lead wire g to 0.4 mg / lead wire g.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the horizontal winding of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 2 is a front view showing a horizontal winding manufacturing apparatus used for manufacturing the horizontal winding of the first embodiment.

In FIG. 2, 1 is a lead wire feeding mechanism, 2 is a rectangular copper wire, 3 is an adhesive coating rotary roll mechanism, 4 is a one-pack type epoxy resin adhesive, 5 is an adhesive coated rectangular copper wire, and 6 is insulating. A tape winding mechanism, 7 is a PET tape, 8 is a horizontal winding of the first embodiment, and 9 is a horizontal winding mechanism.

That is, in the method of manufacturing the transverse winding of the first embodiment,
First, a flat copper wire 2 having a thickness of 1.4 mm in the edge direction and a width of 5.4 mm in the flat direction was sent out from the conductor sending mechanism 1 so that the flat surface was on the upper and lower sides.

Next, the flat copper wire 2 fed so that the flat surface is on the upper and lower sides is fed to the adhesive coating rotary roll mechanism 3, where the one-component epoxy resin adhesive 4 is placed on the flat copper wire 2. 0.002 mg / g of the rectangular copper wire g was applied to obtain an adhesive-coated rectangular copper wire 5.

Next, the adhesive-coated rectangular copper wire 5 is fed to an insulating tape winding mechanism 6, where a 1.5 mil thick PET tape 7 is ½ of the tape width on the adhesive-coated rectangular copper wire 5. The transverse winding 8 of Example 1 was obtained by winding so as to overlap each other.

Here, the winding thickness of the PET tape 7 is 0.076 mm in the edge direction × 0.074 in the flat direction.
mm. The finished size of the transverse winding 8 of Example 1 obtained here is 1.552 mm finished in the edge direction × 5.548 mm finished in the flat direction.

Next, the horizontal winding 8 of the first embodiment obtained here
Was wound on the horizontal winding mechanism 9.

At this time, the winding speed of the horizontal winding 8 of the first embodiment is 5 m / min.

FIG. 1 shows a cross-sectional view of the transverse winding of Example 1 thus obtained.

In FIG. 1, 2 is a rectangular copper wire, 4 is a one-pack type epoxy resin adhesive, and 7 is a PET tape.

As can be seen from FIG. 1, the one-component epoxy resin adhesive 4 is uniformly applied on the rectangular copper wire 2, and the PET tape 7 is applied on the epoxy resin adhesive 4 coated surface.
Are wound, and the rectangular copper wire 2 and PET are wound by them.
The tape 7 and the tape 7 are completely adhered to each other via the one-pack type epoxy resin adhesive 4. (Example 2) The procedure of Example 2 was repeated except that the coating amount of the one-pack type epoxy resin adhesive 4 on the flat copper wire 2 was 0.02 mg / square copper wire g. I got a horizontal winding. (Example 3) The same procedure as in Example 3 was performed except that the coating amount of the one-pack type epoxy resin adhesive 4 on the flat copper wire 2 was 0.4 mg / flat copper wire g. I got a horizontal winding. (Example 4) The same procedure as in Example 4 was performed except that the coating amount of the one-pack type epoxy resin adhesive 4 on the flat copper wire 2 was 0.5 mg / flat copper wire g. I got a horizontal winding. (Comparative Example 1) First, a horizontal winding manufacturing apparatus obtained by removing the adhesive coating rotary roll mechanism in the horizontal winding manufacturing apparatus shown in FIG. 2 was prepared.

Next, a flat copper wire 2 having a thickness of 1.4 mm in the edge direction and a width of 5.4 mm in the flat direction was sent out from the conductor sending device 1 so that the flat surface was the upper and lower sides.

Next, the rectangular copper wire 2 fed so that the flat surface is on the upper and lower sides is fed to the insulating tape winding mechanism 6, and the PET tape 7 having a thickness of 1.5 mil is taped on the rectangular copper wire 2. The transverse winding of Comparative Example 1 was obtained by winding so as to overlap each half of the width.

Here, the winding thickness of the PET tape 7 is 0.075 mm in the edge direction × 0.076 in the flat direction.
mm. The finished size of the transverse winding obtained in Comparative Example 1 is 5.549 mm in edge direction × 1.554 mm in flat direction.

Next, the horizontal winding of Comparative Example 1 obtained here was wound on the horizontal winding winding mechanism 9.

At this time, the winding speed of the transverse winding of Comparative Example 1 is 5 m / min. (Comparative Example 2) Similar to Comparative Example 1, first, a horizontal winding manufacturing apparatus obtained by removing the adhesive coating rotary roll mechanism of the horizontal winding manufacturing apparatus shown in FIG. 2 was prepared.

Next, a flat copper wire 2 having a thickness of 1.4 mm in the edge direction and a width of 5.4 mm in the flat direction was sent from the conductor sending device 1 so that the flat surface was the upper and lower sides.

Next, the rectangular copper wire 2 fed so that the flat surface is on the upper and lower sides is fed to the insulating tape winding mechanism 6, and a prepreg-treated polyimide tape having a thickness of 1.5 mil is placed on the rectangular copper wire 2. A transverse winding of Comparative Example 2 was obtained by winding the tape so that the tape width was 1/2 each.

Here, the winding thickness of the prepreg-treated polyimide tape is 0.070 mm in the edge direction × 0.078 mm in the flat direction. The finished size of the transverse winding of Comparative Example 2 obtained here is 1.540 mm finished in the edge direction × 5.554 mm finished in the flat direction.

Next, the horizontal winding of Comparative Example 2 obtained here was wound around the horizontal winding mechanism 9.

At this time, the winding speed of the horizontal winding of Comparative Example 2 was 5 m / min. (Comparative Example 3) Comparative Example 3 was performed in the same manner as in Example 1 except that the coating amount of the one-pack type epoxy resin adhesive 4 on the flat copper wire 2 was 0.001 mg / flat copper wire g. I got a horizontal winding. (Method for Testing Characteristics of Horizontal Windings of Examples and Comparative Examples) The horizontal windings of Examples and Comparative Examples were subjected to the following characteristic tests.

1) Dielectric Breakdown Voltage Test First, the horizontal windings of the example and the comparative example are each 30 cm in length.
Collected one by one.

Next, an aluminum foil was wound around the outer circumference of the middle portion 100 mm of the horizontal winding having a length of 30 cm.

Next, an AC voltage was applied between the conductor and the aluminum foil to determine the dielectric breakdown voltage (kv).

2) Untangling prevention test First, the horizontal windings of Examples and Comparative Examples were each 30 cm in length.
Collected one by one.

Next, the horizontal winding having a length of 30 cm is φ10 mm.
The mandrel was bent 90 degrees in the flat direction.

Next, the transverse winding was cut at the bend R portion, and the looseness of the insulating tape at the cut end was checked.

The results are shown by ◯ when the insulating tape can be melted only within half the circumference of the rectangular conductor, and by x when the insulating tape was melted over half the circumference of the rectangular conductor.

3) Productivity The product with excellent productivity is shown by ◯, and the product with poor productivity is shown by x.

4) Production costs ○ those with low production costs, × those with high production costs
Indicated by. (Results of Characteristic Test of Horizontal Windings of Examples and Comparative Examples) Table 1 shows the results of these characteristic tests.

[0051]

[Table 1]

As can be seen from Table 1, there is no difference in the breakdown voltage between the horizontal windings of Examples 1 to 5 and the horizontal windings of Comparative Examples 1 to 3.

Next, regarding the edge tape loosening prevention property, the horizontal windings of Examples 1 to 5 of the present invention exhibited excellent insulating tape loosening prevention property, while the conventional horizontal winding. The result shows that the transverse windings of Comparative Example 1 and Comparative Example 3 are easily unraveled. The horizontal winding of Comparative Example 2 in which the prepreg-treated polyimide tape is wound exhibits an excellent insulating tape unraveling property, but the use of the half-face prepreg-treated polyimide tape lowers the productivity and raises the production cost. There are difficulties.

On the other hand, the horizontal windings of Examples 1 to 5 of the present invention have excellent features such as an excellent dielectric breakdown voltage, an excellent insulation tape unraveling property, high productivity, and low production cost. ing.

Further, as can be seen from Table 1, the coating amount of the one-pack type epoxy resin adhesive 4 on the rectangular copper wire 2 is preferably at least 0.002 mg / g of the rectangular copper wire g or more.

If the coating amount of the one-pack type epoxy resin adhesive 4 on the rectangular copper wire 2 is made excessive, problems such as an increase in size, an increase in price, and difficulty in peeling the insulating tape may occur. A maximum of about 0.5 mg / g of rectangular copper wire is desirable.

In the first to fifth embodiments of the present invention, the insulating tape is wound so as to be superposed on each other by ½ of the tape width, but in the present invention, the insulating tape may be butt-wound. Further, the insulating tape can be wound in water by 0 to 1/3.

Of course, the present invention is not limited to the above-mentioned first to fifth embodiments.

[0059]

The horizontal winding of the present invention has an excellent dielectric breakdown voltage,
It has excellent features such as excellent insulation tape disintegration resistance, high productivity, and low production cost, and is industrially useful.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a horizontal winding according to a first embodiment of the present invention.

FIG. 2 is a front explanatory view showing a horizontal winding manufacturing device used for manufacturing the horizontal winding according to the first embodiment of the present invention.

[Explanation of symbols]

1 lead wire sending mechanism 2 flat copper wire 3 Adhesive coating rotary roll mechanism 4 1-pack type epoxy resin adhesive 5 Adhesive coated rectangular copper wire 6 Insulation tape winding mechanism 7 PET tape 8 Horizontal winding of Example 1 9 Horizontal winding mechanism

Claims (3)

[Claims] 1. A transverse winding, characterized in that an adhesive coating layer is provided on a conductive wire, and an insulating tape is wound on the adhesive coating layer. 2. The insulating tape is one selected from kraft paper tape, amine-treated kraft paper tape, polyethylene terephthalate tape, polyethylene naphthalate tape, polyphenylene sulfide tape, and aramid non-woven tape. Horizontal winding described. 3. The coating amount of the adhesive coating layer is 0.002 mg /
The horizontal winding according to claim 1, wherein the conductive wire g is 0.4 mg / conductive wire g.