JPH084653Y2 - Flat wire for coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is, for example, a flat wire for a coil suitable for use as a wire rod for manufacturing a high frequency coil used in a high frequency circuit of an electronic device, an electromagnetic cooker or the like. It is about.

(Prior Art) In recent years, the frequency of electricity used has been increased in order to improve the efficiency and size of electronic devices and electromagnetic devices. When a high-frequency current is passed through the coil, the effects of the skin effect and proximity effect of the wire become large. To reduce this effect,
Conventionally, as a coil wire material, a litz wire formed by concentrically or collectively twisting a plurality of element wires (for example, enameled wire), a litz wire obtained by crushing the twisted wire into a rectangular shape, or a cotton thread or a silk thread on the outer circumference of the twisted wire A litz wire in which a fiber such as a resin thread is wound and coated with insulation or a resin-insulated litz wire by an extrusion method is used. By the way, the outer periphery of the litz wire is further coated with an insulating coating to improve the withstand voltage and to prevent scratches on the wires that make up the litz wire when the wire is processed into a coil. This is for improving the sex. Among the litz wires, the one formed by subjecting the outer peripheral insulating layer to resin insulation by an extrusion method has properties particularly excellent in withstand voltage and workability.

(Problems to be solved by the invention) However, the Litz wire has the following problems.

． Among the litz wires, the one formed by extruding the common insulation layer with resin by extrusion method has twisted wires when the number of strands is 8 or more, and twisting is deformed due to winding after twisting or narrowing during extrusion, resulting in electrical characteristics. Has the disadvantage of decreasing. For this reason, at present, only 7 concentric twisted litz wires with less twist deformation can be manufactured, and more litz wires cannot be manufactured.

． Litz wire with a circular cross-sectional shape has a poor space factor when used as a coil compared to a rectangular wire, which makes the coil larger and hinders the miniaturization of electronic and electromagnetic devices that use it. .

． In the case of crushing the twisted wire into a rectangular litz wire, when the stranded wire is crushed, the twist is likely to be deformed or loosened, and the insulation of the wire may be damaged, and if that happens, the electric Not only the characteristics deteriorate, but also the shape of the litz wire in the longitudinal direction becomes non-uniform, the shape when formed into a coil is not stable, and the space factor is poor.

In addition, the litz wire, which is obtained by crushing the twisted wire into a rectangular shape, is easy to deform and disperse when crushed, and since it is a stranded wire and has a large flexibility, it is necessary to apply uniform outer insulation. However, the electrical characteristics also deteriorate in this respect.

(Object of the Invention) An object of the present invention is to provide a rectangular electric wire for a coil which does not have the above-mentioned problems and is suitable for use as a wire material of a coil for high frequency.

(Means for Solving the Problems) In the flat wire for coil of the present invention, as shown in FIG. 2, an insulating element wire 3 having an insulating film 2 on an outer peripheral surface of a coil conductor 1 is used.
A plurality of sheet-like parallel lines 4 are arranged in parallel in a plane so that the insulating coatings 2 are in contact with each other, and the insulating coatings 2 in contact with the insulating element wires 3 are adhered to each other.
As shown in FIG. 3 and FIG. 3 (a), two or more sheets are directly laminated so that the insulating film 2 is in contact with each other to form a laminated body 6 having a rectangular cross section, and the laminated body is formed as shown in FIG. The outer peripheral insulating coating layer 5 is formed on the entire outer peripheral surface of 6 or at a distance in the longitudinal direction as shown in FIG. It will be.

(Operation) In the flat wire for coil of the present invention, multiple parallel wires 4 formed by stacking a plurality of insulating wires 3 having the insulating film 2 in parallel in a plane and adhering them to each other are stacked. To form a laminated body 6 having a rectangular cross-sectional shape, and the outer peripheral insulating coating layer 5 is formed on the entire outer circumference of the laminated body 6 or at appropriate intervals so as to have a rectangular sectional shape along the outer shape of the laminated body 6. Therefore, unlike the conventional litz wire in which an insulating layer is directly applied to the outer circumference of the stranded wire, the strands are not distorted or deformed after being twisted, and the common insulation is stable. Moreover, since two or more multi-parallel lines 4 are laminated so as to have a rectangular cross-sectional shape, the space factor of the coil is improved and the coil shape is stabilized. In addition, since the outer peripheral insulating coating layer 5 is flexible enough to be wound in a coil shape, the coil can be easily formed. In the present invention, the flat wire for a coil in which the outer peripheral insulating coating layer 5 is partially provided on the outer periphery of the laminated body 6 of the multiple parallel wires 4 at intervals is particularly excellent in flexibility and is therefore particularly easy to wind in a coil shape. . Further, when a coil is formed as shown in FIG. 3 (b), a gap 7 is formed in a portion where the outer peripheral insulating coating layer 5 is not applied, so that heat generated when the coil is energized generates the gap 7.
To the outside, improving the characteristics and life of the coil.

(Embodiment) FIG. 1 is an embodiment of a flat wire for coil according to the present invention, in which two or more multi-parallel wires 4 are laminated in a rectangular cross section, and the outer circumference thereof is covered with an insulating coating. Layer 5 is formed over the entire surface. In this case, the multiple parallel parallel lines 4 having the same width are used, and the cross-sectional shape of the multilayer body 6 is rectangular. The outer peripheral insulating coating layer 5 is formed by, for example, an extrusion method. Perimeter insulation coating layer 5
The material may be paper, film, fiber or the like. The outer peripheral insulating coating layer 5 may be formed by an extrusion method using a resin, which improves withstand voltage, workability and coil winding workability.

What is shown in FIG. 2 is an example of the multiple parallel lines 4,
In this arrangement, a large number of insulating wires 3 whose outer peripheral surface is covered with an insulating film 2 such as enamel are arranged in parallel in one plane, and the insulating films 2 of the insulating wires 3 contacting each other are mutually arranged. Are bonded to form a sheet.

The insulating wire 3 may have a rectangular cross section of the coil conductor 1. The material of the coil conductor 1 is copper, silver,
A material suitable for high frequency coils such as aluminum or copper clad aluminum is desirable.

The third (a) is a different embodiment of the flat wire for coil of the present invention, which is a laminated body 6 in which two or more multi-parallel wires 4 are laminated in a rectangular cross section in the same manner as described above. And an outer peripheral insulating coating layer 5 is provided at appropriate intervals in the outer peripheral longitudinal direction. In this embodiment, the strip-shaped outer peripheral insulating coating layer 5 is spirally wound. The material of the outer peripheral insulating coating layer 5 is cotton thread, silk thread, fiber such as Tetron (trade name),
Any insulating material such as paper, tape, film, etc. may be used as long as it is flexible so that the laminated body 6 provided with it can be wound in a coil shape. In any case, the outer peripheral insulating coating layer 5 is formed along the outer shape of the laminated body 6 to have a rectangular cross section.

FIG. 3 (b) shows a case where the flat wire for a coil is wound around a coil for an electromagnetic cooker. In the flat wire for a coil of the present invention, the insulation wires 3 are fixed to each other to stabilize the shape of the coil. The insulating varnish may be impregnated as described above.

(Effect of the Invention) The flat wire for coil of the present invention has the following effects.

． Since the cross-sectional shape is rectangular, the space factor in the case of forming a coil is improved, and the coil can be downsized.

． Since the multiple parallel wires 4 are used, a non-stranded wire machine can be realized. Further, even if there are eight or more strands, the outer peripheral insulating coating layer 5 made of resin can be formed by the extrusion method. By the way, wires with eight or more wires are important in terms of current capacity and frequency characteristics of the wires, and are in high demand.

． Sheet-like multiple parallel wires are formed by arranging a plurality of insulating wires 3 having an insulating film 2 on the outer periphery in parallel in one plane so that the insulating films 2 are in contact with each other, and adhering the insulating films 2 in contact with each other. Since the number is 4, the insulating strands 3 do not come apart, the regularity of the sheets is secured, and the sheets are easily laminated.

． Since the multiple parallel lines 4 are directly overlapped with each other, the shape of the laminated body 6 is stable, and when the outer peripheral insulating coating layer 5 is applied, the shape is not easily lost and the outer peripheral insulating coating layer 5 is easily applied.

． Since the flat wire for coil of the present invention uses the multiple parallel wires 4, it can be made non-twisted wire, and the trouble that the insulating coating 2 of the insulating wire 3 is damaged can be avoided. Further, the outer peripheral insulating and insulating coating layer 5 can be applied uniformly. According to the present invention,
It is possible to provide a rectangular electric wire for a coil having excellent electric characteristics.

． The rectangular flat wire for coil in which the outer peripheral insulating coating layers 5 are provided at appropriate intervals in the longitudinal direction of the outer periphery of the laminated body 6 of the multiple parallel wires 4 has excellent flexibility and is particularly easy to wind in a coil shape. Further, when the coil is wound, a gap 7 is formed between the insulated wires 3 in a portion where the outer peripheral insulating coating layer 5 is not applied, so that heat generated when the coil is energized is dissipated in the gap 7 and the characteristics and life of the coil Is improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a flat wire for coils of the present invention, FIG. 2 is an explanatory view showing an embodiment of multiple parallel wires used in the same wire, and FIG. 3 (a) is FIG. 3 is an explanatory view showing another embodiment of the flat wire for a coil of the present invention, and FIG. 3 (b) is a plan view of the same wire wound into a coil. 1 is a conductor 2 is an insulating film 3 is an insulated wire 4 is multiple parallel wires 5 is an outer peripheral insulating coating layer 6 is an insulator

Claims (1)

[Scope of utility model registration request] 1. A plurality of insulating wires 3 each having an insulating coating 2 on the outer peripheral surface of a coil conductor 1 are arranged in parallel in a plane so that the insulating coating 2 contacts each other. Sheet-like multiple parallel lines 4 formed by adhering the insulating coatings 2 that are in contact with each other are directly stacked so that the insulating coatings 2 contact each other, and two or more sheets are laminated to form a laminate 6 having a rectangular cross section. Then, the outer peripheral insulating coating layer 5 is formed on the entire outer periphery of the laminated body 6 or at intervals in the longitudinal direction so as to partially follow the outer shape of the laminated body 6 and have a rectangular cross-sectional shape. Flat wire for coil.