JPS61285610A - Litz wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a litz wire used as a coil wire material for, for example, a high frequency transformer, a high frequency electromagnetic deflection device, etc.

[Summary of the invention]

The Nyorori fluorowire of the present invention has a structure in which a bundle of conductors each bundled with a plurality of conductors each having an insulation coating is buried in an insulating material, and an outer sheath is applied around the whole of the bundle, and the insulation coating and the insulation material are is made of materials that do not interfere with soldering,
The jacket is made of a material that can be melted by heating to fuse together, for example, multiple layers of litz wire.

[Conventional technology]

Recently, in cathode ray tubes used in terminal display devices, etc., the frequency of the deflection current applied to the electromagnetic deflection device for electron beam scanning is, for example, 60kHz or 12kHz.
It is becoming as high as 0kHz. In this case, it is desirable that the electromagnetic deflection coil wire be a litz wire with low skin effect resistance.

This litz wire is made by twisting copper wires (12) each coated with an insulating coating (11) made of, for example, polyesteramide, as shown in FIG. 4, for example.

When making a coil for an electromagnetic deflection device as described above using such a litz wire, the litz wire is wound multiple times into a desired shape, for example, a saddle shape, and then the litz wire is heated to about 150°C to form a litz wire. By thermally melting the insulating coating and fusing the multi-wound litz wires together, the coil can be mechanically integrated as a whole and can be maintained in the wound shape, for example, a saddle shape. ing.

When making a coil using this conductor wire,
In addition to being able to obtain a coil with low high-frequency skin effect resistance, it is also possible to integrate the coil as a whole or hold it in a desired shape, especially if the litz wire is coated with an insulation coating that can be heat-sealed as described above. It's convenient to be able to do that. However, when soldering such a conductive wire for terminal extraction or other purposes, the polyester imide insulation coating must be soldered at a temperature of 250°C.
At a temperature of about .degree. C. to 300.degree. C., this insulating coating does not decompose, ie, carbonize, or disappear, but remains while maintaining its insulating properties, so it is necessary to remove this insulating coating when soldering. To remove this insulating coating, for example, a litz wire is sandwiched between a pair of rotating brushes and the insulating coating is stripped off. Only a portion of the copper wire is exposed to the outside, and it is difficult to expose the part of the copper wire that is inside the litz wire to the outside. Therefore, if soldering is performed in this state, only the outermost copper wire, and only the portion facing the outer circumference, will be soldered, and the entire copper wire will not be used effectively. However, the work of stripping off the insulation coating and removing #I from each copper wire significantly reduces work efficiency.

On the other hand, it is conceivable that the insulating coating of the above-mentioned Litz wire be made of an insulating material such as polyurethane, which carbonizes at temperature and does not substantially interfere with soldering. Due to heat fusion, effects such as multiple winding, mechanical integration of the conductor wires, shape retention, ie, molding, etc. cannot be obtained.

[Problem that the invention seeks to solve]

The present invention makes it possible to perform soldering reliably, and also to achieve the effect of integrating Litz wires with each other and forming them.
The present invention provides a Litz wire that solves the above-mentioned problems by making it possible to do this, and makes it suitable for use in the above-mentioned deflection coil that handles high frequencies, or the coil of a high-frequency transformer. Note that the litz wire in this specification is not limited to twisted wires, but refers to a wire in which a plurality of core wires, that is, conductive wires such as copper wires are arranged, for example, approximately in parallel.

[Means for solving problems]

As shown in FIG. 1, the present invention prepares a coated conductor (4) having a conductor (1) as a core wire and an insulating coating (2) on its outer periphery, and twists or twists a plurality of these coated conductors. The bundle of covered conductor wires, which are laid out in parallel without matching, is buried in the insulating material (3). In other words, the insulating material (3) is filled between the bundled covered conductor wires (4) to form a wire rod with a high efficiency as a whole. Then, a jacket (5) is applied to the entire outer periphery of this wire, that is, the bundle of covered conductor wires, to form a litz wire (6).

In particular, the insulating coating (2) and the insulating material (3) are insulating materials that are decomposed by heating at a temperature of, for example, 250°C to 300°C, for example, carbonized or disappeared, and do not substantially interfere with soldering. Materials such as polyurethane resin '31.
7 Consists of 1. Also, the outer cover (5) melts by heating to about 150°C, which is lower than the soldering temperature, for example, and has a fusing effect.
It is made of a material such as polyesterimide resin, which is an insulating material.

According to the above-mentioned present invention in the reed (action), according to the conductor (6), half 1)
, 1. When attaching, the outer cover (4) exists only on the outermost periphery.

For example, t Li M (D rotation 7 to 2 6 degrees without passing the 2 line 1 degree) (, , as shown in FIG. 2, eliminate it.

In this way, the other insulating material (3) and the insulating coating (2) are made of materials ""1 that do not interfere with the electrical and mechanical connection by soldering, such as carbonization due to heating during soldering.
°71 °7 configuration 71. ' 4 (7) r/Central 0 conductor ° All conductors (1) including the conductor 1 (1) can be soldered well. Since there is an outer cover (5) at 1° where soldering is not done, this
If a saddle-shaped coil or other coil is wound multiple times in a shape that suits the usage and purpose, for example, if it is heated with electricity, the outer sheaths (5) of the Litz wires (6) that are in contact with each other will melt together as shown in Figure 3. It is possible to easily obtain a coil that is integrated into a desired shape such as a saddle shape.

〔Example〕

To further explain with reference to FIG. 1, for example, a copper wire with a diameter of 0.1 mm is used as the conductor (1), and the wire is passed through a tank containing liquid insulating material to adhere the insulating material. ,
Subsequently, the coated conductor (4) is coated with an insulating liquid FR (2) of polyurethane by passing it through a drying oven.
). A plurality of coated conductive wires (4) obtained in this way, for example 14 wires, are twisted together or arranged in parallel and passed through a liquid insulating material in the same way (through a drying oven to improve the appearance). For example, the coated conductor bundle may be covered with a similar urethane insulation material (
3), followed by passing it through a tank containing a melt of polyesterimide and drying it to form an outer covering (5).
).

〔Effect of the invention〕

As described above, according to the litz wire according to the present invention, soldering can be easily and reliably performed by removing only the outer sheath (5). Since they can be fused and integrated with each other using the outer sheath, it is extremely convenient in practical use for making coils, etc.

[Brief explanation of drawings]

Fig. 1 is an enlarged cross-sectional view showing an example of the conductive wire according to the present invention, Fig. 2 is a similar enlarged cross-sectional view in a state where the outer cover is peeled off for soldering, and Fig. 3 is an enlarged cross-sectional view of the soldering conductor shown in Fig. 1. FIG. 4 is an enlarged cross-sectional view showing a multiple winding state, and FIG. 4 is an enlarged cross-sectional view of a conventional litz wire. FIG. 5 is an enlarged sectional view in a state where the outer cover is peeled off for soldering. (6) is a litz wire, (4) is a covered conductor, (1) is the conductor 1, (2) is its insulation coating, (3) is an insulating material, (5)
is the outer covering. Figure 2 Procedural Amendment Form) % Formula % 2. Name of the invention Rin 9 Line 3, Relationship with the person making Supplement 1E 7 Patent Applicant Address 6-7-35, Kitashina-yo, Part-time Ward, Tokyo Issue name (2
18) Sony Corporation Representative Director Norio Ohga 4, Agent

Claims (1)

[Claims] A plurality of covered conductor wires each having an insulation coating are bundled and buried in an insulating material, and an outer sheath is applied to the outer periphery of the bundle of covered conductor wires, and the insulation material and the insulation coating decompose at the soldering temperature. The litz wire is made of an insulating material that does not interfere with soldering, and the outer sheath is made of a heat-sealing material.