JP5159269B2 - Composite wires and coils - Google Patents

Description

  The present invention relates to a composite electric wire and a coil, and more particularly to a composite electric wire and a coil capable of reducing loss in a high-frequency circuit, a DC superposition high-frequency circuit, a low-frequency superposition high-frequency circuit, or a high-frequency circuit whose frequency varies.

2. Description of the Related Art Conventionally, there has been known a composite electric wire in which a wire made of an insulator is used as a core wire, and a plurality of insulation-coated copper wires are twisted around the core wire (see, for example, Patent Document 1 and Patent Document 2).
JP 2005-108654 A JP-A-7-153328

The conventional composite electric wire has a reduced high-frequency resistance due to the proximity effect. In other words, with ordinary Litz wire, the magnetic field created by the strand enters the center of the litz wire and increases the copper loss in the core of the litz wire. It is a thing.
However, there is a problem in that resistance at direct current or low frequency increases because no strand is arranged at the center of the litz wire. That is, there is a problem in that loss increases when used as a coil in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies.
Accordingly, an object of the present invention is to provide a composite electric wire and a coil that can reduce loss in a DC superposition high-frequency circuit, a low-frequency superposition high-frequency circuit, or a high-frequency circuit whose frequency varies.

In a first aspect, the present invention provides a single-wire magnetic plated copper wire or an insulation-coated magnetic plated copper wire as a core wire, and the strands of the insulation-coated copper wire are assembled around the core wire without twisting or twisting. Provide a composite electric wire.
In the composite electric wire according to the first aspect, since the magnetic plated copper wire or the insulation-coated magnetic plated copper wire is arranged at the center of the composite electric wire, the resistance at direct current or low frequency can be reduced. And since the magnetic field created by the strands around the core wire is blocked by the magnetic plating layer of the magnetic plated copper wire or the insulation coated magnetic plated copper wire, it becomes difficult to enter the copper portion of the central portion (because it becomes small even if entering), In addition, the magnetic field produced by the core wire is also blocked by the magnetic plating layer, making it difficult to reach the insulation-coated copper wire around the core wire (because it becomes small even if it enters), so it is possible to suppress an increase in copper loss due to the proximity effect at high frequencies. I can do it. Therefore, it is possible to reduce a loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies.

In a second aspect, the present invention provides a core wire that is a stranded wire of a plurality of insulation-coated magnetic plated copper wires or a bundle of bundles of a plurality of insulation-coated magnetic plated copper wires without being twisted, and the insulation coating is provided around the core wires. Provided is a composite electric wire in which strands of copper wire are twisted or assembled without twisting.
In the composite electric wire according to the second aspect, since the insulation-coated magnetic plated copper wire is disposed at the center of the composite electric wire, the resistance at direct current or low frequency can be reduced. The magnetic field generated by the strands around the core wire is blocked by the magnetic layer of the insulation-coated magnetic plated copper wire, making it difficult to enter the central copper portion (because it becomes small), and the magnetic field generated by the core wire Since it is difficult to enter the insulation-coated copper wire around the core wire because it is blocked by the magnetic plating layer (because it becomes small even if it enters), it is possible to suppress an increase in copper loss due to the proximity effect at high frequencies. Therefore, it is possible to reduce a loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies. Furthermore, since the core wire is a stranded wire of a plurality of insulation-coated magnetic plated copper wires or a bundled wire bundled without being twisted, the wire is excellent in flexibility.

In a third aspect, the present invention provides a core wire comprising a wire in which a plurality of insulation coated copper wires or a plurality of insulation coated copper wires are bundled together without being twisted and wrapped with a magnetic layer. A composite electric wire in which strands of insulation-coated copper wire are twisted or assembled without being twisted is provided.
In the composite electric wire according to the third aspect, since the insulation-coated copper wire is arranged at the center of the composite electric wire, the resistance at direct current or low frequency can be reduced. The magnetic field generated by the strands around the core wire is blocked by the magnetic layer, making it difficult to enter the insulation-covered copper wire portion in the center (because it gets smaller), and the magnetic field generated by the core wire is also the magnetic plating layer Since it is difficult to enter the insulation-coated copper wire around the core wire (because it is small even if it enters), an increase in copper loss due to the proximity effect at high frequencies can be suppressed. Therefore, it is possible to reduce a loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies. In addition, since the core wire is a stranded wire of a plurality of insulation-coated copper wires or a bundled wire bundled without twisting a plurality of insulation-coated copper wires, the wire is excellent in flexibility.

In a fourth aspect, the present invention provides the composite electric wire according to the third aspect, wherein the magnetic layer is made of a magnetic tape.
In the composite electric wire according to the fourth aspect, a magnetic layer may be formed by winding a magnetic tape around a plurality of insulation-coated copper wires or a set of bundles of a plurality of insulation-coated copper wires bundled without being twisted. I can do it.

In a fifth aspect, the present invention provides the composite electric wire according to the third aspect, wherein the magnetic layer is made of a magnetic resin.
In the composite electric wire according to the fifth aspect, a magnetic layer is formed by extruding and wrapping a magnetic resin around a stranded wire of a plurality of insulation-coated copper wires or an assembly wire bundled without twisting a plurality of insulation-coated copper wires. I can do it.

In a sixth aspect, the present invention provides a coil formed by winding a composite electric wire according to any one of the first to fifth aspects.
Since the coil according to the sixth aspect uses the composite electric wires according to the first to fifth aspects, the loss is reduced in a high frequency circuit, a DC superimposed high frequency circuit, a low frequency superimposed high frequency circuit, or a high frequency circuit whose frequency varies. I can do it.

  According to the composite electric wire of the present invention, loss can be reduced in a DC superposition high-frequency circuit, a low-frequency superposition high-frequency circuit, or a high-frequency circuit whose frequency varies.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

FIG. 1 is a cross-sectional view illustrating the composite wire 100 according to the first embodiment.
The composite electric wire 100 is composed of a single-wire magnetic plated copper wire 10 as a core wire, and the strands of the insulation-coated copper wire 20 are assembled around the magnetic-plated copper wire 10 with or without twisting. It is a covered structure.

  As shown in FIG. 2, the magnetic plating copper wire 10 is obtained by forming a magnetic plating layer 2 such as an iron plating layer or a nickel plating layer around the copper wire 1.

  As shown in FIG. 3, the insulation-coated copper wire 20 is obtained by forming an enamel insulation coating 4 around the copper wire 3.

  According to the composite electric wire 100 of Example 1, since the magnetic plating copper wire 10 is arranged in the center part, the resistance in direct current or low frequency can be reduced. And since the magnetic field which the surrounding insulation coating copper wire 20 produces is interrupted by the magnetic plating layer 2 of the magnetic plating copper wire 10 and it becomes difficult to enter the copper wire 1 (because it becomes small), the magnetic plating copper wire Since the magnetic field produced by the magnetic field 10 is also blocked by the magnetic plating layer 2 and does not easily enter the insulation-coated copper wire 20 (because it becomes small), an increase in copper loss due to the proximity effect at high frequencies can be suppressed. Therefore, it is possible to reduce a loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies.

FIG. 4 is a cross-sectional view illustrating the composite wire 100 ′ according to the second embodiment.
The composite electric wire 100 ′ is a single wire insulation coated magnetic plated copper wire 40 as a core wire, and the strands of the insulation coated copper wire 20 are assembled around the insulation coated magnetic plated copper wire 40 with or without twisting. The structure is covered with an insulating coating 30.

  As shown in FIG. 5, the insulation-coated magnetic plated copper wire 40 is formed by forming a magnetic plating layer 2 such as an iron plating layer or a nickel plating layer around the copper wire 1, and further coating with an insulation coating 5. .

  According to the composite electric wire 100 ′ of the second embodiment, since the insulation-coated magnetic plated copper wire 40 is arranged at the center, the resistance at DC or low frequency can be reduced. The magnetic field produced by the surrounding insulation-coated copper wire 20 is blocked by the magnetic plating layer 2 of the insulation-coated magnetic plated copper wire 40 and is difficult to enter the copper wire 1 (because it becomes small), and the insulation coating Since the magnetic field produced by the magnetic plated copper wire 40 is also blocked by the magnetic plating layer 2 and difficult to enter the insulation-coated copper wire 20 (because it becomes small), it is also possible to suppress an increase in copper loss due to the proximity effect at high frequencies. I can do it. Therefore, it is possible to reduce loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies.

FIG. 6 is a cross-sectional view illustrating the composite wire 200 according to the third embodiment.
This composite electric wire 200 uses a twisted wire of a plurality of insulation-coated magnetic plated copper wires 40 or a set wire bundled without twisting a plurality of insulation-coated magnetic plated copper wires 40 as a core wire, and the insulation-coated copper wire around the core wire. In this structure, 20 strands are gathered together without twisting or covered with an insulating coating 30.

  According to the composite electric wire 200 of the third embodiment, since the insulation-coated magnetic plated copper wire 40 is disposed at the center, the resistance at DC or low frequency can be reduced. The magnetic field produced by the surrounding insulation-coated copper wire 20 is blocked by the magnetic plating layer 2 of the insulation-coated magnetic plated copper wire 40 and is difficult to enter the copper wire 1 (because it becomes small), and the insulation coating Since the magnetic field produced by the magnetic plated copper wire 40 is also blocked by the magnetic plating layer 2 and difficult to enter the insulation-coated copper wire 20 (because it becomes small), it is also possible to suppress an increase in copper loss due to the proximity effect at high frequencies. I can do it. Therefore, it is possible to reduce loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies. Furthermore, since the core wire is a twisted wire of the plurality of insulation-coated magnetic plated copper wires 40 or a bundled wire bundled without being twisted, the wire is excellent in flexibility.

FIG. 7 is a cross-sectional view illustrating the composite wire 300 according to the fourth embodiment.
In this composite electric wire 300, a wire in which a magnetic layer 60 is wrapped around a stranded wire of a plurality of insulation-coated copper wires 20 or an assembly wire in which a plurality of insulation-coated copper wires 20 are bundled without being twisted is used as a core wire. In this structure, the strands of the insulation-coated copper wire 20 are twisted or gathered together without being twisted and covered with the insulation coating 30.

  The magnetic layer 60 may be formed by winding a magnetic tape around a stranded wire of a plurality of insulation-coated copper wires 20 or an assembly wire in which a plurality of insulation-coated copper wires 20 are bundled without being twisted, or extruding a magnetic resin. May be coated.

  According to the composite electric wire 300 of the fourth embodiment, since the insulation-coated copper wire 20 is disposed at the center, the resistance at direct current or low frequency can be reduced. The magnetic field generated by the peripheral insulation-coated copper wire 20 is blocked by the magnetic layer 60, making it difficult to enter the insulation-covered copper wire 20 of the core wire (because it becomes small), and also the insulation-coated copper wire 20 of the core wire. Since the magnetic field generated by the magnetic field 60 is blocked by the magnetic layer 60 and it is difficult to enter the surrounding insulation-coated copper wire 20 (because it is small even if it enters), an increase in copper loss due to the proximity effect at high frequencies can be suppressed. Therefore, it is possible to reduce loss in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies. Furthermore, since the core wire is a twisted wire of the plurality of insulation-coated copper wires 20 or a bundled wire bundled without being twisted, the wire is excellent in flexibility.

  When the strand of the insulation-coated copper wire (20) is twisted around the core wire, the core coating and the strand are integrated by the twist, and therefore the insulation coating (30) may be omitted.

FIG. 8 shows frequency characteristics of a solenoid coil (white square) using the composite wire 200 according to the third embodiment and a solenoid coil (black rhombus) using a hollow litz wire obtained by removing the core wire from the composite wire 200 according to the third embodiment. FIG.
The composite electric wire 200 is a litz wire formed by twisting seven insulation-coated magnetic plated copper wires 40 having a diameter of 0.14 mm as a core wire, and 51 insulation-coated copper wires 20 having a diameter of 0.14 mm are twisted around the core wire. It is a thing.
The solenoid coil has an inner diameter of 20 mm and 21 turns per layer.
The vertical axis of FIG. 8 shows the resistance value R of the solenoid coil, which is a solenoid coil having the same structure prepared by using 58 litz wires (usually litz wires) twisted by insulation-coated copper wires 20 having a diameter of 0.14 mm. The relative value R / Rn with respect to the resistance value Rn is shown. Therefore, the frequency region where the value on the vertical axis is smaller than “1” is a region where the loss is smaller than that of the solenoid coil having the same structure using a normal litz wire.
As can be seen from FIG. 8, the coil according to the present invention has almost the same loss at a direct current and a low frequency in the vicinity thereof as compared with a coil having the same structure using a litz wire, and a loss at a higher frequency than that. Becomes smaller. Further, at a frequency lower than about 1000 kHz, the loss is smaller than that of the coil having the same structure using the hollow litz wire.

  The composite electric wire and coil of the present invention can be suitably used in a DC superposition high frequency circuit, a low frequency superposition high frequency circuit, or a high frequency circuit whose frequency varies. As a specific example, the present invention can be used for electromagnetic induction utilizing devices such as choke coils, transformers, inductors, and TV deflection yokes.

1 is a cross-sectional view showing a composite electric wire according to Example 1. FIG. 1 is a cross-sectional view showing a magnetic plated copper wire according to Example 1. FIG. 1 is a cross-sectional view showing an insulation-coated copper wire according to Example 1. FIG. 6 is a cross-sectional view showing a composite electric wire according to Example 2. FIG. 6 is a cross-sectional view showing an insulation-coated magnetic plated copper wire according to Example 2. FIG. 6 is a cross-sectional view showing a composite electric wire according to Example 3. FIG. 6 is a cross-sectional view showing a composite electric wire according to Example 4. FIG. FIG. 10 is a characteristic diagram illustrating frequency characteristics of a solenoid coil according to a sixth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,3 Copper wire 2 Magnetic plating layer 4 Enamel insulation coating 5,30 Insulation coating 10 Magnetic plating copper wire 20 Insulation coating copper wire 40 Insulation coating magnetic plating copper wire 60 Magnetic layer 100,100 ', 200,300 Composite electric wire

Claims (6)

A composite electric wire in which a single-wire magnetic plated copper wire or an insulation-coated magnetic plated copper wire is used as a core wire, and strands of the insulation-coated copper wire are gathered around the core wire or assembled without twisting. A twisted wire of a plurality of insulation-coated magnetic plated copper wires or a set wire bundled without twisting a plurality of insulation-coated magnetic plated copper wires is used as a core wire, and a strand of the insulation-coated copper wire is twisted around the core wire or Composite wire assembled without twisting. A core wire is a wire in which a plurality of insulation-coated copper wires or an assembly wire in which a plurality of insulation-coated copper wires are bundled without being twisted is wrapped with a magnetic layer, and a wire of the insulation-coated copper wire around the core wire Composite wire assembled with or without twisting. The composite electric wire according to claim 3, wherein the magnetic layer is made of a magnetic tape. The composite electric wire according to claim 3, wherein the magnetic layer is made of a magnetic resin. A coil formed by winding the composite electric wire according to any one of claims 1 to 5.

Images