JPH02126514A - Bound insulation cable and deflection yoke using same - Google Patents

Abstract

PURPOSE:To reduce the amount of heat generated in association with high frequency resistance loss and improve reliability and productivity by binding a plurality of naked conductors in an approximate cross-sectional shape as a core conductor and disposing an insulation coating over the core conductor by applying and baking an insulation paint around the outer surface of the bound cables. CONSTITUTION:A collective conductor 4 is made by binding a plurality of naked conductor wire 3 in parallel in an approximate cross sectional shape or by roughly twisting a plurality of naked conductor wires 3 in approximately circular cross sectional shape. An insulation paint is applied and baked around the circumference of the collective cable 4 to form a collective insulation cable 1 coated with an insulation film 6. Because the collected conductor wires 3 are conductive to each other, high frequency eddy current is produced in the collective conductor 4. A point contact conductivity is made in the cross section between adjacent naked conductor wires 3 because the wire is of a circular cross section. As a result, electric resistance of the eddy current in the collective conductor 4 is high and the eddy current is suppressed low. As a result, heat amount generated due to high frequency resistance loss is reduced as a whole.

Description

[Detailed Description of the Invention] Field of Application in the C'M Industry] The present invention relates to an insulated wire suitable for use in a high-frequency coil, and furthermore, the present invention relates to an insulated wire suitable for use in a high-frequency coil, and furthermore, the present invention relates to an insulated wire suitable for use in a high-frequency coil, and furthermore, the present invention relates to a high-temperature insulated wire suitable for use in a high-frequency coil, and furthermore, a high-temperature insulated wire that suppresses heat generation in a deflection coil by using a low-g wire. This invention relates to a deflection yoke suitable for high-definition applications.

[Conventional technology]

As is well known, the causes of heat generation in a high frequency coil can be divided into heat generation due to direct current resistance loss of the coil and heat generation due to 1°b frequency resistance loss. In the deflection yoke, the main heat source is the deflection coil, and in recent years, in cathode ray tube display devices that have advanced to IfE definition, the deflection scanning frequency applied to the deflection yoke is 33 klb. , 84 losses and even 130 losses, which is becoming a high frequency. In such a high frequency range, the loss due to eddy current generated in the deflection coil conductor cannot be ignored, and the influence of the loss due to the high frequency range increases significantly compared to the loss due to DC resistance. In the above-mentioned high frequency range, the effect of loss due to the skin effect of the coil conductor is not very noticeable, and the effect of loss due to the skin effect of the coil conductor is not so significant. flow loss is dominant. Such an increase in the high frequency resistance loss of the deflection coil naturally results in an increase in the amount of heat generated by the deflection coil, resulting in a decrease in the performance and reliability of the deflection yoke.

Therefore, in order to reduce the high-frequency resistance loss of the deflection coil, conventionally, as an FFL wire for the coil of the deflection coil, a plurality of small diameter insulated I1 wires are twisted together, and each insulated wire is located at every position in the cross section of the stranded wire. A group-stranded electric wire in which a plurality of wires are simply concentrically twisted or collectively twisted is known, and a deflection yoke using these electric wires is also well-known. ing.

The following explanation will be given using a litz wire, which is a common high-frequency electric wire, as an example.

FIG. 4 illustrates the structure of a litz wire. Figure (a) is a cross-sectional view of the beam wire, Figure (b) is a cross-sectional view of the self-fusion type litz wire, and Figure (C) is an external perspective view of the self-fusion type litz wire.

10, a litz wire 511 is a thin insulated wire constituting a litz wire, and the outer periphery of a thin conductor 12 is coated with a layer 13 having an insulation degree of V. As described above, each of the plurality of small-diameter wires 11 is twisted together to form a litz wire 10 so as to sequentially occupy all the positions of the twisted cross section. When winding around a Kura-type deflection coil,
As shown in FIG. 2B, a self-fusion type litz wire 10' is used, in which a fusion layer 6 is provided on the outer periphery of the litz wire 10.

[Problem to be solved by the invention]

When a litz wire or a mass stranded electric wire is used as a wire for a high-frequency coil, high-frequency resistance loss is reduced, and a deflection coil wound with this wire has a certain effect in reducing the amount of heat generated due to the loss of high-frequency resistance ttt. are doing. However, deflection coils using Litz wires or collectively stranded electric wires still have problems that need to be improved in terms of coil reliability and product cost.

In other words, in the case of a deflection coil made by winding a stranded wire, the effective cross-sectional area of the coil conductor in the coil forming area of the deflection coil is equal to that of each of the litz wires or the stranded wire. It is reduced by the total cross-sectional area of the insulation coating of the insulating wire.

The reduction in the effective cross-sectional area of the conductor of the coil has a negative effect on reducing the amount of heat generated by the coil, as will be described later.

(2) Litz wires or mass-twisted FFI wires are formed by twisting individual wires each coated with an insulating film at a relatively fine pitch. There is also a high risk that processing deterioration may occur, which may impair the reliability of the deflection coil.

(3) Furthermore, since Litz wires or collective silent wires require a large number of man-hours to manufacture wires, in terms of wire costs, and in terms of the manufacturing process of deflection coils, it is important to This resulted in a lot of complicated work such as removing the insulation film from the B wires, which made the production of deflection yokes less efficient.

The present invention solves the problems of the conventional twisted wire or multi-stranded electric wire and the deflection yoke using the same, and further reduces the amount of heat generated due to high frequency resistance loss. The present invention aims to provide a high-frequency coil electric wire with higher reliability and better productivity, and a deflection yoke using the same.

[Means to solve the problem]

The present invention provides a focused insulated wire or a coil formed by using a focusing conductor made by bundling a plurality of bare conductors with a substantially circular cross section as a core conductor, and applying and baking an insulating paint to the outer periphery of the focusing conductor to form an insulating film. The invention is characterized by a self-fusing insulated wire in which a self-fusing film layer is applied on the insulating film layer according to the necessity of the invention, and the insulated wire is further deflected into either a horizontal deflection coil or a vertical deflection coil. It is characterized by a deflection yoke wound around a coil or both deflection coils.

[For production]

The bundled insulated wire or self-bonding type bundled insulation '11 of the present invention!
In the case of wires, the multiple conductor strands that initially form these insulated wires are bare conductors without an insulating layer,
The bundled bare conductor strands are electrically connected to each other. Therefore, high frequency eddy currents naturally occur within the focusing conductor. However, since each conductor strand is circular, point contact continuity is formed between adjacent conductor strands in the cross section. Therefore, the electrical resistance of the eddy current path within the focusing conductor is high, the generated eddy current is kept low, the increase in high frequency resistance due to eddy current loss is relatively small, and the effects described below are This has a large effect, resulting in a reduction in the amount of heat generated by the coil as a whole compared to conventional twisted wires or collective stranded wires. That is, in the case of the bundled insulated wire or the self-bonding type bundled insulated wire of the present invention, the finished outer diameter is the same.

Linz wire or collective twist consisting of the same number of strands 1! When compared to wires, each conductor 1r4 wire constituting the focused insulated wire or self-bonding focused insulated wire is not coated with an insulating film, so it is possible to increase the conductor diameter of each conductor IF4 wire. be. This increases the effective cross-sectional area of the coil conductor portion in the coil forming cross-sectional area, that is, the conductor space factor when the wire is wound around a coil as a coil wire. In the a-direction coil, increasing the coil conductor space factor means increasing the ratio of the deflection coil inductance L to DC resistance R, L
/R. This is because the inductance L is uniquely determined by the number of turns of the deflection coil, and the DC resistance R is uniquely determined by the cross-sectional area of the deflection coil conductor.

On the other hand, it has been experimentally confirmed by various inventors that there is a clear correlation between L/R and the degree of temperature rise due to heat generation of the deflection coil. Figure 2 shows the deflection scanning frequency of 3
Temperature rise degree of Cla-shaped deflection coil when set to 3 △
These are actual results showing the relationship between T and L/R. That is, L/R
is closely related to the amount of heat generated by the deflection coil, and it is clear that increasing L/R has a large effect on reducing the amount of heat generated by the deflection coil.

[Example] Hereinafter, an example of the present invention will be described with reference to FIG. FIG. 1(a) is a cross-sectional view of the bundled insulated wire of the present invention, and FIG. 1(b) is a cross-sectional view of the bundled insulated wire of the present invention.
is a perspective view of a bundled insulated wire in which each conductor wire is bundled in parallel, and the same figure (e) is a diagram of a bundled insulated wire made by twisting each conductor J4m together. The external perspective view of the wire is shown in FIG.

1 is a focused insulated ffi wire. The bundle 4 is made by bundling a plurality of bare conductor elements tiA3 in parallel to have a substantially circular cross section, or by bundling a plurality of bare conductor wires 3 into a bundle approximately 10 times the layer core diameter of the bundle conductor 4.
It is formed by giving an extremely coarse twist of 0 times or more and bundling it into a substantially circular cross section. Note that the focusing conductor 4 may be made by concentrically or collectively twisting a plurality of bare conductor strands 3 at a normal twisting pitch, and the outer periphery of the focusing conductor 4 may be made of polyurethane resin or the like. The bundled insulated wire 1 is formed by applying an insulating coating 6 by applying and baking an insulating paint to a required thickness. When winding around a self-holding coil such as a club type deflection coil, a self-adhesive FsA paint such as polyamide resin is further coated on the outer periphery of the insulating film layer 5 of the above-mentioned bundled insulated wire l and baked to adhere to the PJA. Self with layer 6! IIR type focused insulation "11M2" is used.

As an example, there will be shown a Kura-type deflection coil made by J& of the present invention, which is wound with such a self-fusion type focused wire 2, and as a comparative example, a Kula-type deflection coil, which is formed by winding a conventional self-fusing mm-type Litz wire 10'. The results of the performance comparison are described below.

The comparative example of the Cla-type deflection coil has a wire conductor diameter of 0.12 mm.
Seven polyurethane insulated wires are twisted together at a pitch of 6 Ill, and a polyamide fusion layer is applied to the outer periphery to give a finished outer diameter of 0.
It was formed by winding a self-fusing Lindt wire with a diameter of 46-φ. The Cla-shaped deflection coil of the example has a conductor diameter of 0.14-φ
Bare conductor wires were laid out in 7 horizontal parallels to have an approximately circular cross section, and a polyurethane insulating layer and a polyamide melting layer were successively applied to the outer periphery of the bare conductor wire to give the same finish and outer diameter as the self-bonding Lindt wire of the comparative example. It was formed by winding a self-fusion type focused insulated wire having a diameter of 46+amφ.

The results of comparing and measuring the characteristics of the Cla-type deflection coils of this example and comparative example. Compared to the rotated horn type deflection coil, the conductor density of the deflection coil is 36% higher at L/H, and the temperature rise of the deflection coil at the deflection scanning frequency of 331& is reduced by 7 to 8 degrees (Celsius). was confirmed. Note that the insulated insulated wire or self-bonding insulated wire of the present invention is not limited to the deflection coil described above, and can of course be applied to other high-frequency coils, as well as similar Needless to say, it is effective.

〔Effect of the invention〕

As mentioned above, when the bundled insulated wire or self-bonding type bundled insulated Iu wire of the present invention is wound into a coil, the conductor of the coil is 8! As a result of the greatly improved efficiency, this greatly contributes to reducing the amount of heat generated due to high-frequency resistance loss in the coil. Furthermore, the insulation film can be easily removed during wire terminal treatment.

In addition, the above-mentioned focusing insulated tTl wire or self-fusing, n-type focusing ability is improved, and the efficiency of the assembly work of the deflection yoke is improved, such as by making it easier to remove the insulation film in the lead terminal processing process of the deflection coil. This made it possible to reduce the manufacturing cost of the deflection yoke.

[Brief explanation of drawings]

Figure 1 shows a bundled insulated wire of the present invention, (a) is a cross-sectional view of the bundled wire M' wire, and (b) is a cross-sectional view of the bundled insulated wire in which each conductor wire is bundled in parallel. A1 is a perspective view, FIG. 1C is an external perspective view of a bundled insulated wire made by twisting and bundling each conductor and wire, and FIG. 1D is a cross-sectional view of a self-fusion type bundled insulated wire. Figure 2 shows the ratio between the inductance L and the DC resistance R of the Cla-shaped deflection coil. (2) A graph showing the relationship between /R and the temperature difference Δ'F of the curved deflection coil (at a deflection scanning frequency of 33-hi);
Figure 3 is an outline drawing of a Cla-shaped deflection coil, Figure 4 (a) is a cross-sectional view of a beam-shaped deflection coil, Figure 4 (b) is a cross-sectional view of a self-fusion type Litz wire, and Figure 4 (c) is a cross-sectional view of a self-fusing type Litz wire. Oblique view of fused litz wire g
This is a diagram. 1-1 bundled insulated wire, 2 self-fusion type bundled insulated R wire,
3- Bare conductor strand 4 Bundled conductor, 5 Absolute B layer, 6 Fusion layer. Cla type deflection coil

Claims (6)

[Claims] (1) A focusing device characterized in that a plurality of bare conductor strands are bundled to have a substantially circular cross section to form a focusing conductor, and an insulating coating is applied on the outer periphery of the focusing conductor by coating and baking an insulating coating. Insulated wire. (2) The bundled insulated wire according to claim 1, wherein the bundled conductor is a bundle of a plurality of bare conductor strands parallel to the longitudinal direction of the strands so as to have a substantially circular cross section. (3) The focused insulated wire according to claim 1, wherein the focusing conductor is twisted extremely coarsely at least about 100 times the layer core diameter of the focusing conductor, and is bundled to have a substantially circular cross section. (4) A self-fusing type bundle characterized in that a self-fusing coating is applied by applying and baking a self-fusing paint on the outer periphery of the insulating film of the bundled insulated wire according to claim 1, 2 or 3. Insulated wire. (5) Claim 1,
A deflection yoke characterized by being formed by winding the focused insulated wire according to 2 or 3. (6) The self-fusion type focusing insulated wire according to claim 4 is wound around at least one of the horizontal deflection coil and the vertical deflection coil in the deflection yoke, in which at least one of the horizontal deflection coil and the vertical deflection coil is formed of a cross-shaped deflection coil. A deflection yoke characterized by: