JPH10241471A - Conduction noise cut wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conduction noise cut wire in which a high frequency band conduction noise can be effectively cut by the structure itself of the wire. SOLUTION: Plural conductors 12 are strand wound around core material 11 having a magnetic substance. High resistant dummy wires are contained in the conductors 12. The conductors 12 are coated by high dielectric constant insulation material 14, and simultaneously the insulation material 14 is successively coated by an outer conductor 3 and insulation sheath material 4. The conductors 12 are wound spirally around the core material 11 having a magnetic substance, the conductors 12 are coated by the high dielectric constant insulation material 14, and simultaneously the insulation material 14 is successively coated by the outer conductors 3 and the insulation sheath material 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive noise cut wire which can cut a high frequency band conductive noise transmitted from a circuit by the wire structure itself.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4A, a copper stranded wire 1 in which a plurality of copper wires are twisted is covered with an insulating material 2 such as PE (polyethylene), and the insulating material 2 There is an electric wire (coaxial cable) 5 which is sequentially coated with an outer conductor 3 such as a braid or a copper tape and an insulating sheath material 4 such as PE or PVC (polyvinyl chloride).

Further, as shown in FIG. 4B, a pair of twisted copper wires 1, 1 in which a plurality of copper wires are twisted are coated with insulating materials 2, 2, such as PVC, respectively. There is an electric wire (shielded electric wire for automobile) 6 in which the outer conductors 2 and 2 are sequentially coated with an outer conductor 3 such as a braid or a copper tape and an insulating sheath material 4 such as PE or PVC. In addition, 7 is a drain wire.

[0004]

However, the conventional electric wires 5 and 6 are used to cut external (radiation) noise by the external conductor 3, and effectively cut high frequency band conducted noise. Can not do it. That is, as shown in FIG.
6 has a characteristic that it is difficult to conduct as the L (coil) component increases and the R (resistance) component of the wires 5 and 6 increases as shown in FIG. Is
This is because both the L component and the R component are set small for the purpose of only cutting external noise. As shown in FIG. 3A, the high frequency band conducted noise a
6 has the characteristic that the more the C (condenser) component is, the more easily it is conducted.

The conventional countermeasure against conducted noise in a high-frequency band merely involves providing a noise filter on a circuit.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a conductive noise cut wire which can effectively cut a high frequency band conductive noise by the wire structure itself. It is.

[0007]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, a plurality of conductors are twisted and wound around a core material having a magnetic material, and a dummy conductor is inserted into the plurality of conductors. Wherein the conductive wire is covered with an insulating material having a high dielectric constant, and the insulating material is successively covered with an outer conductor and an insulating sheath material. It is.

According to the first aspect, a plurality of conductive wires are twisted and wound around a core material having a magnetic material, and a dummy conductive wire is included in the plurality of conductive wires, and the conductive wires are formed of an insulating material having a high dielectric constant. Cover. Next, this insulating material is sequentially covered with an outer conductor and an insulating sheath material as in the related art.

By twisting and winding a plurality of conductive wires around a core material having a magnetic material, the L (coil) component is increased. In addition, by providing an insulating material having a high dielectric constant between the conductor and the outer conductor, the capacitance between the conductor and the outer conductor,
That is, the C (condenser) component increases. As a result, the conduction noise in the high frequency band is transmitted to the outer conductor through an insulating material having a large C component and easily conducted, avoiding a conductive wire having a large L component and difficult to conduct. You can escape.

If a high-resistance conductor is used as the plurality of conductors of the first aspect, the R component is increased.

According to a third aspect of the present invention, a conductive wire is spirally wound around a core material having a magnetic material, and the conductive wire is covered with an insulating material having a high dielectric constant. And a conductive noise cut electric wire characterized by being successively coated with a conductive noise cut wire.

According to the third aspect, a conductive wire is spirally wound around a core material having a magnetic material, and the conductor is covered with an insulating material having a high dielectric constant. Next, this insulating material is sequentially covered with an outer conductor and an insulating sheath material as in the related art.

[0013] Then, by winding a conductive wire around a core material having a magnetic material in a spiral shape, the L component is increased. Further, by providing a high dielectric constant insulating material between the conductor and the outer conductor, the capacitance between them, that is, the C component increases. Thus, similarly to the first aspect, high-frequency conduction noise is transmitted to the outer conductor through an insulating material that has a large C component and is easily conducted, avoiding a core material and a conductive wire having a large L component and being difficult to conduct. And can escape from the outer conductor to the ground. Further, as in the case of the second aspect, if a conductor having a high resistance is used for the conductor, the R component is further increased.

Further, in the present invention, the tension bar serving as the core material is coated with a high-resistance conductive paint, and the conductive paint is coated with a high-dielectric-constant insulating material. A conductive noise-cut electric wire characterized by being sequentially coated with an insulating sheath material.

According to the present invention, the tension bar is coated with a high-resistance conductive paint, and the conductor is coated with an insulating material having a high dielectric constant. Next, this insulating material is sequentially covered with an outer conductor and an insulating sheath material as in the related art.

By coating the tension bar with a high-resistance conductive paint, the R component increases,
By providing an insulating material having a high dielectric constant between the conductive paint and the external conductor, the capacitance between them, that is, the C component increases. As a result, the conductive noise in the high frequency band can be prevented from passing through the insulating material, which has a large C component and easily conducts, by avoiding the tension bar and the conductive paint, which have a large R component, as in the first embodiment. , And can escape from the outer conductor to the ground.

Further, according to a fifth aspect of the present invention, the high-resistance conductive wire serving as the core material is coated with an insulating material having a high dielectric constant, and the insulating material is sequentially coated with an outer conductor and an insulating sheath material. A conductive noise-cut electric wire characterized by the following.

According to the fifth aspect, the high-resistance conductive wire serving as the core is covered with an insulating material having a high dielectric constant. Next, this insulating material is sequentially covered with an outer conductor and an insulating sheath material as in the related art.

The R component is increased by the high-resistance conductor, and the capacitance between the conductor and the external conductor is increased by providing an insulating material having a high dielectric constant between the conductor and the outer conductor. Become. Thus, similarly to the first aspect, the high-frequency conduction noise is transmitted to the external conductor through an insulating material having a large amount of the C component and easily conducting, avoiding a conductive wire having a large amount of the R component. And can escape from the outer conductor to the ground.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1A shows a conductive noise cut electric wire 10A according to the first embodiment. This electric wire 10A is wound around a core material (for example, a core material in which iron is coated with PVC) 11 having a magnetic material while twisting a plurality of conductive wires (for example, copper) 12,. By including a high-resistance dummy conductor (eg, an enamel wire) 13 in the conductor 12, the current flows in a spiral (coil) shape.

The conductors 12 and 13 are covered with an insulating material (for example, made of PVC) 14 having a high dielectric constant (for example, 5 to 7 F / m). Thereafter, the insulating material 14 is sequentially covered with a conventional outer conductor (for example, made of braid or copper tape) 3 and an insulating sheath material (for example, made of PVC or PE) 4.

In the conductive noise cut electric wire 10A of the first embodiment, a plurality of conductive wires 12
Is added, and the conductive wire 12 is wound around the conductive wire 12 including a high-resistance dummy wire (for example, an enameled wire), thereby increasing the L (coil) component.

Further, by providing the insulating material 14 having a high dielectric constant between the conductor 12 and the outer conductor 3, the capacitance between them, that is, the C (capacitor) component increases.

As a result, as shown in FIG.
The transmission noise a in the high frequency band is transmitted to the outer conductor 3 through the insulating material 14 having a large amount of the C component and avoiding the core material 11 and the conducting wire 12 having a large amount of the R component and the L component and being difficult to conduct. , And can escape from the outer conductor 3 to the ground.
It can be effectively cut with the structure of 0A itself. In addition, lead 1
By using a high-resistance material (for example, a copper alloy or aluminum) for 2, the R component can be increased.

FIG. 1B shows a conductive noise cut electric wire 10B according to a second embodiment. In the electric wire 10B, one conductive wire 12 is spirally wound around a core material 11 having the same magnetic material as in the first embodiment. The conductor 12 is covered with an insulating material 14 having the same high dielectric constant as in the first embodiment. After that, the insulating material 14 is sequentially coated with the outer conductor 3 and the insulating sheath material 4 as in the related art.

In the conductive noise cut electric wire 10B of the second embodiment, the L component is increased by spirally winding one conductive wire 12 around a core material 11 having a magnetic material. Further, by providing an insulating material 14 having a high dielectric constant between the conductive wire 12 and the external conductor 3, the capacitance (C component) therebetween is increased.

As a result, as shown in FIG.
As in the first embodiment, the conducted noise a in the high frequency band is L
By avoiding the core material 11 and the conducting wire 12 which have a large amount of components and are difficult to conduct, the C component is conducted to the outer conductor 3 through the insulating material 14 which has a large amount of conductivity and escapes from the outer conductor 3 to the ground. Can be. By using a high-resistance material (for example, copper alloy or aluminum) for the conductive wire 12, R
More ingredients can be used.

FIG. 2A shows a conductive noise cut electric wire 10C according to a third embodiment. The electric wire 10 </ b> C covers a tension bar (for example, made of carbon fiber) 15 with a high-resistance conductive paint (for example, carbon) 16. The conductive paint 16 is made of an insulating material 1 having a high dielectric constant similar to that of the first embodiment.
Cover with 4. After that, the insulating material 14 is sequentially coated with the outer conductor 3 and the insulating sheath material 4 as in the related art.

In the conductive noise cut electric wire 10C of the third embodiment, by covering the tension bar 15 with the conductive paint 16 having high resistance, the R component is increased, and
By providing the insulating material 14 having a high dielectric constant between the conductive paint 16 and the external conductor 3, the capacitance (C component) therebetween increases.

As a result, as shown in FIG. 3 (E), the conduction noise a in the high frequency band has a large amount of the C component and a large amount of the C component, avoiding the tension bar 18 and the conductive paint 19, which have a large amount of the R component. The conductive material 15 is conducted to the outer conductor 15 through the insulating material 14 which is easily damaged, and can escape from the outer conductor 15 to the ground.

FIG. 2B shows a conduction noise cut electric wire 10D according to a fourth embodiment. The electric wire 10 </ b> D is formed by coating a high-resistance conductive wire (for example, a stranded wire or a single wire made of copper alloy, aluminum, or the like) 17 serving as a core material with an insulating material 14 having the same high dielectric constant as in the first embodiment. After that, the insulating material 14 is sequentially coated with the outer conductor 3 and the insulating sheath material 4 as in the related art.

In the conductive noise cut electric wire 10D of the fourth embodiment, the R component is increased by the high-resistance conductor 17 and the insulating material 14 having a high dielectric constant is interposed between the conductor 17 and the external conductor 3. By doing so, the capacitance (C component) during this time increases.

As a result, as shown in FIG.
The conduction noise a in the high frequency band is conducted to the outer conductor 3 through the insulating material 14 having a large C component and easily conducting, avoiding the conducting wire 17 having a large R component and being hardly conducted. From the ground to the ground.

The conductive noise cut electric wire 1 of each of the above embodiments
In 0A to 10D, PE (dielectric constant 2.3) and rubber (dielectric constant 3 to 5) are used as an insulating material having a high dielectric constant (F / m) in addition to PVC (dielectric constant 5 to 7). Although possible, if the cost ratio of PVC is 1, PE is 1.1
PVC is 3.3 times that of rubber, and PVC is optimal in consideration of both dielectric constant and cost.

[0036]

As is apparent from the above description, the conductive noise-cut electric wire according to the first aspect of the present invention is obtained by twisting a plurality of conductors around a core material having a magnetic material and winding the plurality of conductors. The inclusion of a dummy conductor therein increases the L component, and the insertion of a high dielectric constant insulating material between the conductor and the outer conductor increases the C component. By avoiding a conductive wire having a large amount of L component and difficult to conduct, it is conducted to an outer conductor through an insulating material having a large amount of C component and easily conducted, and can be released to the ground from the outer conductor. Since the conducted noise can be effectively cut by the electric wire structure itself, it is not necessary to provide a noise filter on the circuit. In addition,
If a high-resistance conductor is used as the plurality of conductors, the R component is increased.

Further, by winding a conductive wire around a core material having a magnetic material in a spiral shape, the L component is increased, and a high dielectric constant insulating material is interposed between the conductor and the external conductor. Since the C component increases by setting,
The high-frequency conduction noise can be released from the outer conductor to the ground in the same manner as in the first aspect. Further, as in the case of the second aspect, if a conductor having a high resistance is used for the conductor, the R component is further increased.

Further, by coating the tension bar with a high-resistance conductive paint, the R component is increased, and an insulating material having a high dielectric constant is provided between the conductive paint and the external conductor. Since the C component increases due to the interposition, the conduction noise in the high frequency band can be released from the external conductor to the ground as in the first aspect.

Furthermore, the R component is increased by the high-resistance conductor, and the C component is increased by interposing an insulating material having a high dielectric constant between the conductor and the external conductor. Therefore, the conducted noise in the high frequency band can be released from the external conductor to the ground as in the first aspect.

[Brief description of the drawings]

FIG. 1 is a conduction noise cut electric wire of the present invention,
(A) is a perspective view of the first embodiment, and (B) is a perspective view of the second embodiment.

FIG. 2A is a perspective view of a third embodiment, and FIG. 2B is a perspective view of a fourth embodiment.

3A to 3C are characteristic graphs of a C component, an L component, and an R component, respectively, and FIGS. 3D and 3E are characteristic circuit diagrams of C, L, and R, respectively.

FIGS. 4A and 4B are perspective views of a conventional electric wire, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Outer conductor 4 Insulation sheath material 10A-10D Conduction noise cut electric wire 11 Core material 12 Conductor 13 Dummy conductor 14 Insulation material 15 Tension bar 16 Conductive paint 17 Conductor

Claims (5)

[Claims] A plurality of conductors are twisted and wound around a core material having a magnetic material, a dummy conductor is included in the plurality of conductors, and the conductors are covered with an insulating material having a high dielectric constant. A conductive noise-cut electric wire, wherein an insulating material is sequentially coated with an outer conductor and an insulating sheath material. 2. The conductive noise cut electric wire according to claim 1, wherein a high-resistance conductive wire is used for said plurality of conductive wires. 3. A conductive wire is spirally wound around a core material having a magnetic material, and the conductive wire is coated with an insulating material having a high dielectric constant. The insulating material is sequentially coated with an outer conductor and an insulating sheath material. A conductive noise cut electric wire characterized by comprising: 4. A tension bar serving as a core material is coated with a high-resistance conductive paint, and the conductive paint is coated with a high-dielectric-constant insulating material, and the insulating material is formed of an outer conductor and an insulating sheath material. A conductive noise-cut electric wire characterized by being sequentially coated. 5. A conductive noise characterized in that a high-resistance conductive wire serving as a core material is coated with an insulating material having a high dielectric constant, and the insulating material is sequentially coated with an outer conductor and an insulating sheath material. Cut wires.