JP2009181760A - Electric wire, litz wire, and winding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a litz wire improved in flexibility. <P>SOLUTION: The litz wire (101) has a plurality of strands (1) stranded around a core wire (10). The core wire (10) is a wire which has a flexible material of cross-sectional circular shape, and has a plurality of depressions (11) applied with a predetermined spacing in line length direction, wherein the depression (11) goes one round around the core wire (10). When the core wire is bent, the depression (11) is opened on the outside of bending, and the depression (11) is closed on inner side. Accordingly, since the core wire (10) can be bent easily, its flexibility is improved to easily use the litz wire (101) for a winding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric wire, a litz wire, and a winding, and more particularly, to an electric wire, a litz wire with improved flexibility, and a winding using the electric wire or the litz wire.

Conventionally, a litz wire (hollow litz wire) in which a plurality of conductor strands are twisted around a high resistivity material core wire is known (see, for example, Patent Document 1).
JP-A-7-153328 (FIG. 9)

In the above conventional litz wire, the flexibility of the whole litz wire is impaired due to the core wire, and there is a problem that it is difficult to form the winding.
Accordingly, an object of the present invention is to provide an electric wire, a litz which has improved flexibility and facilitates winding in an electric wire in which a plurality of conductor strands are gathered around a high resistivity core material wire without being twisted. Is to provide a line. Moreover, it is providing the coil | winding using those electric wires or a litz wire.

In the first aspect, the present invention provides an electric wire in which a plurality of conductor strands (1) are gathered around a high resistivity core wire (10) or assembled without twisting, the core wire (10) being Provided is an electric wire (101, 102) having a plurality of indentations (11) provided at predetermined intervals in the wire length direction, wherein the indentations (11) make one round of the core wire (10). To do.
In the present invention, the high specific resistance material refers to a material having a specific resistance value that is 100 times or more the specific resistance value of copper.
In the electric wire according to the first aspect, when the electric wire is bent, the depression of the core wire is opened on the outer side to bend, and the depression is closed on the inner side and the core wire is easily bent, so that the flexibility is improved. Thereby, it becomes easy to make an electric wire into a coil | winding.
The core wire can be manufactured, for example, by pulling out the resin from the nozzle while repeatedly reducing the nozzle inner diameter for a short time at regular intervals. In addition, after the resin is drawn out from the nozzle with a constant nozzle inner diameter, it can be manufactured by engraving a notch that makes one round of the core wire at regular intervals.

In a second aspect, the present invention relates to an electric wire in which a plurality of conductor strands (1) are twisted or assembled without being twisted around a high resistivity core wire (20), wherein the core wire (20) is A plurality of indentations (21) provided at predetermined intervals in the line length direction, the indentations (21) do not make one round of the core wire (20), and the depressions (21) adjacent in the line length direction Provided are electric wires (103, 104) characterized by different circumferential positions.
In the electric wire according to the second aspect, when the electric wire is bent, the depression of the core wire is opened on the outer side to bend, and the depression is closed on the inner side and the core wire is easily bent, so that the flexibility is improved. Thereby, it becomes easy to make an electric wire into a coil | winding.
The core wire can be manufactured, for example, by drawing resin from the nozzle with a constant nozzle inner diameter and then cutting incisions of ¼ circumference at regular intervals while shifting the position in the circumferential direction.

In a third aspect, the present invention relates to a litz wire in which a plurality of conductor strands (1) are twisted around a high resistivity core wire (30), wherein the core wire (30) is a spiral recess (31). A litz wire (105) is provided, characterized in that the spiral direction of the recess (31) is opposite to the twist direction of the conductor wire (1).
In the electric wire according to the third aspect, when the electric wire is bent, the depression of the core wire is opened on the outer side to bend, and the depression is closed on the inner side and the core wire is easily bent, so that the flexibility is improved. Thereby, it becomes easy to make an electric wire into a coil | winding. Since the spiral direction of the depression is opposite to the stranding direction of the strand, the strand does not fall into the depression. As the spiral direction of the dent and the twist direction of the strand are closer to each other, the strands are less likely to fall into the dent, so that a large dent can be obtained and great flexibility is obtained. In addition, the material can be reduced and the weight can be reduced.
The core wire can be manufactured, for example, by encircling a cutter around the core wire and engraving a recess in a spiral manner while drawing resin from the nozzle with a constant nozzle inner diameter.

In a fourth aspect, the present invention provides a litz wire in which a plurality of conductor strands (1) are twisted around a high resistivity core wire (40), wherein the core wire (40) is a plurality of high resistivity wires. A litz wire (106) is provided, wherein (41) is twisted in the same direction as the twist direction of the conductor wire (1).
In the litz wire according to the fourth aspect, since the core wire is also a stranded wire, flexibility is improved. Thereby, it becomes easy to make a litz wire into a winding. Further, the twisting return of the core wire, which is likely to occur when twisted, is a return integrated with the strands and becomes a harmonized return (loosening) as a whole, and the handling in the winding process becomes easy.
In addition, this litz wire can be manufactured, for example, by twisting a plurality of high specific resistance material wires to manufacture a core wire and then twisting a strand around the core wire. Alternatively, the core wire can be manufactured by twisting a plurality of high specific resistance material wires, and immediately after that, the strand can be twisted around the core wire.

In a fifth aspect, the present invention provides a winding comprising the electric wire according to the first or second aspect or the litz wire according to the third or fourth aspect.
Since the winding according to the fifth aspect uses the electric wire or the litz wire according to the present invention that facilitates the winding process, it is easy to manufacture and can be used for various coils, transformers, and other devices.
Losses when used as a winding are roughly divided into copper loss and core loss. Copper loss is basically loss at the time of air core, and the loss is increased depending on winding conditions. The result that the high frequency loss of this air core winding can be reduced is obtained.

The electric wire and litz wire of the present invention can be easily wound because the flexibility of the core wire is improved. Further, since the core wire is a high specific resistance material, high frequency loss can be reduced.
Since the winding of the present invention uses an electric wire or a litz wire with improved flexibility of the core wire, the winding process becomes easy. Moreover, high frequency loss can be reduced.

  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 perspective view illustrating a litz wire 101 according to the first embodiment.
The litz wire 101 is obtained by twisting a plurality of strands 1 around the core wire 10. A coating litz wire may be formed by covering the outer periphery with an insulating coating (not shown).

  The core wire 10 is a wire having a circular cross section made of a flexible material (for example, polyethylene resin), and has a plurality of recesses 11 provided at predetermined intervals in the wire length direction. Yes. The maximum outer diameter is, for example, 0.42 mm, the depth of the recess 11 is, for example, 0.1 mm, and the width of the recess 11 is, for example, 0.2 mm. The space | interval of the hollow 11 is 1 mm, for example.

  The core wire 10 can be manufactured, for example, by pulling out the resin from the nozzle while repeatedly narrowing the nozzle inner diameter for a short time at regular intervals. In addition, after the resin is drawn out from the nozzle with a constant nozzle inner diameter, it can be manufactured by engraving a notch that makes one round of the core wire at regular intervals.

  The element wire 1 is, for example, an enamel-coated copper wire having a conductor diameter of 0.14 mm.

  According to the litz wire 101 of Example 1, the dent 11 opens on the outer side to be bent, and the dent 11 closes on the inner side, and the core wire 10 is easily bent, so that flexibility is improved. This makes it easier to use the litz wire 101 for winding.

FIG. 2 is a perspective view illustrating the assembly line 102 according to the second embodiment.
The assembly wire 102 is a bundle of a plurality of strands 1 around the core wire 10 without being twisted, and an insulating coating (not shown) is put on the outer periphery.

  The core wire 10 and the strand 1 have the same configuration as in the first embodiment.

  According to the assembly line 102 of the second embodiment, the dent 11 is opened on the outer side to be bent and the dent 11 is closed on the inner side, and the core wire 10 is easily bent, so that flexibility is improved. This makes it easier to use the litz wire 102 for winding.

FIG. 3 is a perspective view illustrating the litz wire 103 according to the third embodiment.
The litz wire 103 is obtained by twisting a plurality of strands 1 around the core wire 20. A coating litz wire may be formed by covering the outer periphery with an insulating coating (not shown).

  The core wire 20 is a wire having a circular cross section made of a flexible material (for example, nylon resin), and has a plurality of recesses 21 provided at predetermined intervals in the wire length direction, and the circumferential length of the recesses 21 is a core wire. The circumferential position of the recesses 21 adjacent to each other in the line length direction is shifted by a quarter turn. The maximum outer diameter of the core wire 20 is, for example, 0.42 mm, the depth of the recess 21 is, for example, 0.15 mm, and the width of the recess 21 is, for example, 0.2 mm. The space | interval of the hollow 21 is 2 mm, for example.

  The core wire 20 can be manufactured, for example, by drawing a resin with a constant nozzle inner diameter from a nozzle and then cutting incisions of a quarter of the core wire in the circumferential direction at regular intervals.

  The element wire 1 is, for example, an enamel-coated copper wire having a conductor diameter of 0.14 mm.

  According to the litz wire 103 of the third embodiment, the dent 21 opens on the outer side to be bent and the dent 21 closes on the inner side, and the core wire 20 is easily bent, so that flexibility is improved. Thereby, it becomes easy to use the litz wire 103 for the winding.

FIG. 4 is a perspective view illustrating the assembly line 104 according to the fourth embodiment.
The assembly wire 104 is a bundle of a plurality of strands 1 around the core wire 20 without being twisted, and an insulating coating (not shown) is put on the outer periphery.

  The core wire 20 and the strand 1 have the same configuration as in the third embodiment.

  According to the assembly line 104 of the fourth embodiment, the dent 21 opens on the outer side to be bent and the dent 21 closes on the inner side, and the core wire 20 is easily bent, so that the flexibility is improved. This makes it easier to use the litz wire 104 for winding.

FIG. 5 is a side view illustrating the litz wire 105 according to the fifth embodiment.
The litz wire 105 is obtained by twisting a plurality of strands 1 around the core wire 30. A coating litz wire may be formed by covering the outer periphery with an insulating coating (not shown).

  The core wire 30 is a wire having a circular cross section made of a flexible material (for example, vinyl chloride resin), and has a spiral recess 31 on the outer peripheral surface. The spiral direction of the recess 31 is opposite to the twisting direction of the strand 1. The maximum outer diameter of the core wire 20 is, for example, 0.42 mm, the depth of the recess 21 is, for example, 0.1 mm, and the width of the recess 21 is, for example, 0.3 mm. The spiral pitch of the recesses 21 is, for example, 1 mm.

  The core wire 30 can be manufactured, for example, by encircling a cutter around the core wire and engraving a recess in a spiral manner while pulling out resin from the nozzle with a constant nozzle inner diameter.

  The element wire 1 is, for example, an enamel-coated copper wire having a conductor diameter of 0.14 mm.

  According to the litz wire 105 of the fifth embodiment, when bending, the recess 31 opens on the outer side to be bent, and the recess 31 closes on the inner side, and the core wire 30 is easily bent, so that flexibility is improved. Thereby, it becomes easy to use the litz wire 105 for the winding.

FIG. 6 is a perspective view illustrating the litz wire 106 according to the sixth embodiment.
The litz wire 106 is obtained by twisting a plurality of strands 1 around the core wire 40. A coating litz wire may be formed by covering the outer periphery with an insulating coating (not shown).

  The core wire 40 is formed by twisting a plurality of high specific resistance material wires 41 having a circular cross section made of a flexible material (for example, polyester resin). The twist direction is the same as the twist direction of the strand 1. The maximum outer diameter of the core wire 40 is, for example, 0.42 mm, and the outer diameter of the high specific resistance material wire 41 is, for example, 0.14 mm. The twist pitch is, for example, 50 mm.

  The element wire 1 is, for example, an enamel-coated copper wire having a conductor diameter of 0.14 mm.

  The litz wire 106 can be continuously manufactured by twisting the strands 1 around the core wire 40 immediately after the core wire 40 is manufactured by twisting a plurality of high resistivity wires 41, for example.

  According to the litz wire 106 of the sixth embodiment, the core wire 40 that is a stranded wire is easily bent, so that flexibility is improved. This makes it easier to use the litz wire 106 for winding.

  The windings in which the litz wires 101, 103, 105, and 106 of the first, third, fifth, and sixth embodiments and the collective wires 102 and 104 of the second and fourth embodiments are wound have a simple winding process. Can be used in transformers and other winding equipment, reducing high frequency loss.

In FIG. 7, the loss of the solenoid coil using the litz wire 101 (= hollow litz wire) of Example 1 and the litz wire (= ordinary litz wire) used as the conductor wire up to the core wire 10 as a comparative example were used. Indicates the loss of the solenoid coil.
At 250 kHz or higher, the loss of the solenoid coil using the litz wire 101 of the first embodiment is smaller than the loss of the solenoid coil using the litz wire as the conductor wire up to the core wire 10 portion.

  The electric wires, litz wires and windings of the present invention can be used in electromagnetic induction utilizing devices such as choke coils, transformers, inductors, and TV deflection yokes.

It is a perspective view which shows the litz wire which concerns on Example 1. FIG. FIG. 6 is a cross-sectional view illustrating a collecting line according to a second embodiment. It is a perspective view which shows the litz wire which concerns on Example 3. FIG. It is a perspective view which shows the assembly line which concerns on Example 4. FIG. It is a side view which shows the litz wire which concerns on Example 5. It is a perspective view which shows the litz wire which concerns on Example 6. FIG. It is a graph which shows the loss characteristic of the solenoid coil using the litz wire which used the litz wire which made the conductor strand to the part of the core wire as a comparative example, and the loss characteristic of the solenoid coil using the litz wire of Example 1.

Explanation of symbols

1 Wire 10, 20, 30, 40 Core wire 11, 21, 31 Recess 41 High resistivity wire 101, 103, 105, 106 Ritz wire 102, 104 Assembly wire

Claims (5)

In the electric wire in which a plurality of conductor wires (1) are twisted or assembled without being twisted around the high resistivity material core wire (10), the core wire (10) is attached at predetermined intervals in the wire length direction. An electric wire (101, 102) having a plurality of indentations (11), wherein the indentations (11) make a round of the core wire (10). In an electric wire in which a plurality of conductor wires (1) are gathered around a high specific resistance material core wire (20) with or without twisting, the core wire (20) is attached at a predetermined interval in the wire length direction. It has a plurality of depressions (21), and the depression (21) does not make one round of the core wire (20), and the positions in the circumferential direction of the depressions (21) adjacent in the line length direction are different. Electric wires (103, 104) to be used. In a litz wire in which a plurality of conductor wires (1) are twisted around a high resistivity material core wire (30), the core wire (30) has a spiral recess (31), and the recess (31) A litz wire (105), wherein the spiral direction is opposite to the twist direction of the conductor wire (1). In a litz wire in which a plurality of conductor strands (1) are twisted around a high specific resistance material core wire (40), the core wire (40) is connected to a plurality of high specific resistance material wires (41). Litz wire (106), which is twisted in the same direction as the twisting direction of A winding obtained by winding the electric wire according to claim 1 or 2, or the litz wire according to claim 3 or 4.

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