JPH04340341A - Winding for electric apparatus - Google Patents

Abstract

PURPOSE:To produce a firmly integrated winding in structure for an electric apparatus through a simple process by preventing the collapse of the winding. CONSTITUTION:After a thermo-setting sticky adhesive layer 5 is applied by coating or sticking to an overlapping face between flat type insulated wires 2, a winding 1 is formed by winding the flat type insulated wire 2 in a spiral over and over again around a given core. Since the thermo-setting sticky adhesive layer 5 is pressurized under a securing force of winding, the flat type insulated wire 2 is wound while it is bonded. When the winding is completed, an entirely bonded winding 1 can be obtained with no fear of collapse. As a result, a firmly integrated winding in structure for an electric apparatus can be obtained in a simple manufacturing process.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in windings for electrical equipment.

0002

[Prior art] In electrical equipment such as transformers and reactors,
In consideration of space factor and miniaturization of electrical equipment, a flat plate-shaped winding is used, which is formed by winding an insulated wire made of a rectangular conductor and an insulating tape wound around the rectangular conductor in a spiral shape. This winding is made by integrally bonding insulated wires wound and formed into a spiral shape so that it can withstand vibrations during operation and mechanical forces caused by system short circuits.

[0003] Conventionally, integral adhesion of winding wires has been achieved by impregnating the wound and formed insulated wire with varnish to integrate it, or by adding a semi-hardened thermosetting resin to the outermost layer of the insulated wire. This is done by applying an adhesive layer, wrapping and molding the insulated wire, and then heating and curing it to integrate the insulated wire.

0004

[Problem to be Solved by the Invention] Conventionally, integral adhesion of winding wires has been carried out as described above, and is carried out by heating an insulated wire after winding and forming it into a predetermined shape and size. Therefore, when winding the insulated wires, the windings are not integrated, and there is a risk that the shape of the windings may collapse. Therefore, when moving from the process of winding and forming the insulated wire to the process of integrally gluing the wrapped and formed insulated wire,
It was necessary to pay attention to maintaining the shape of the insulated wire and to re-shape the insulated wire, which made it impossible to prevent the manufacturing process from becoming more complicated.

The present invention has been made in view of the above, and an object of the present invention is to provide a winding wire for an electrical device that is structurally strongly integrated through a simple process.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an insulated wire that is composed of a conductor and an insulating layer covering the conductor and is wound to form a winding wire, and the insulated wire It is characterized by comprising a heat-curable adhesive layer that is provided on the overlapping surface of the insulated wire and integrally adheres the insulated wire based on the tightening force when the insulated wire is wound.

[0007]

[Operation] According to the present invention, the heat-curable adhesive layer located between the wound insulated wires integrally bonds the insulated wires, that is, the windings, based on the tightening force during wrapping and forming. Therefore, there is no need to pay attention to maintaining the shape of the insulated wire or to re-shape the insulated wire.

[0008]

[Embodiment] Hereinafter, the present invention will be described in detail based on an embodiment shown in FIGS. 1 and 2. The flat winding 1 according to the present invention is
The rectangular insulated wire 2 coated with or affixed with the heat-curable adhesive layer 5 is formed by winding the rectangular insulated wire 2 in a spiral shape many times around a predetermined winding core (not shown).

As shown in FIG. 2, the rectangular insulated wire 2 includes a rectangular conductor 3 made of copper or aluminum, etc., with a rectangular cross section, and a rectangular conductor 3 made of coil insulating paper, plastic film, plastic coating, etc. It is composed of an insulating layer 4 that covers.

[0010] The heat-curable adhesive layer 5 may be a liquid heat-curable adhesive such as acrylic or silicone, or a double-sided adhesive tape with these heat-curable adhesives coated on both sides. These heat-curing adhesives and double-sided adhesive tapes are applied or adhered to the longitudinal direction of the overlapping surface (one side) of the flat insulated wire 2, thereby making it easier to wrap the flat insulated wire 2. Adhesive force can be obtained by tightening force (pressing force). By acquiring this adhesive force, the wound rectangular insulated wire 2, in other words, the winding 1 is integrally bonded.

[0011] Therefore, in order to form the flat winding 1,
First, the heat-curable adhesive layer 5 is applied to the overlapping surface (one side) of the rectangular insulated wire 3. At this time, if the thermosetting adhesive layer 5 is a liquid adhesive, it may be applied to the polymerized surface using a brush, roller, sponge, etc.
A liquid adhesive is applied by spraying under pressure, and if the heat-curing adhesive layer 5 is a double-sided adhesive tape, a double-sided adhesive tape of the same size and width is pasted in the longitudinal direction of the polymerized surface. do.

[0012] Then, by winding the rectangular insulated wire 2 around a predetermined winding core in a spiral shape many times while tightening it, a shaped flat plate-shaped winding 1 can be obtained. At this time, the heat-curable adhesive layer 5 is pressurized by the tightening force at the time of winding, and the rectangular insulated wire 2 is wrapped while being adhered, so that there is no risk of it collapsing at the end of the winding. winding 1 installed
It becomes possible to obtain.

Note that the winding 1 of the electrical equipment is placed in a high temperature state during operation of the electrical equipment, and the heat-curing adhesive layer 5
may lose adhesive strength at high temperatures. If the formed winding 1 is then transferred to a heating process for the purpose of drying the insulator and cured by heating, even more reliable adhesive strength can be obtained.

Furthermore, in the above embodiment, the heat-curable adhesive layer 5 is made of an acrylic or silicone liquid heat-curable adhesive, or a double-sided adhesive tape coated with such a heat-curable adhesive on both sides. However, the material is not limited to the above-mentioned material as long as it has the ability to obtain adhesive strength by applying pressure and harden by heat treatment.

[0015]

As described above, according to the present invention, the heat-curing adhesive adhesive layer located between the wound insulated wires is bonded to the insulated wires based on the tightening force during winding and forming. Since the wires are bonded together, there is no need to pay attention to maintaining the shape of the insulated wires or to re-shape the insulated wires. Therefore, it is possible to create highly structurally integrated electrical equipment with a simple manufacturing process. This has the advantage that windings can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of a winding of an electrical device according to the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

[Explanation of symbols]

1 Winding wire 2 Flat insulated wire 3. Flat conductor 4 Insulating layer 5 Heat-curable adhesive layer

Claims (1)

[Claims] Claim 1: An insulated wire consisting of a conductor and an insulating layer covering the conductor, which are wound to form a winding, and an insulated wire provided on the overlapping surface of the insulated wire to provide a tightening force when the insulated wire is wound. 1. A winding wire for an electrical device, comprising: a thermosetting adhesive layer for integrally bonding an insulated wire;