JP6147600B2 - Litz wire - Google Patents

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JP6147600B2
JP6147600B2 JP2013152877A JP2013152877A JP6147600B2 JP 6147600 B2 JP6147600 B2 JP 6147600B2 JP 2013152877 A JP2013152877 A JP 2013152877A JP 2013152877 A JP2013152877 A JP 2013152877A JP 6147600 B2 JP6147600 B2 JP 6147600B2
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litz wire
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弘司 平池
弘司 平池
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Description

本発明は、複数の絶縁細線を束ねたリッツ線に関するものである。   The present invention relates to a litz wire in which a plurality of insulating thin wires are bundled.

従来、複数の絶縁細線を束にしたリッツ線が種々の装置の配線として使用されている。絶縁細線は、銅、鉄、アルミニウム、黄銅などの導体線をエナメルなどの絶縁被膜で覆ったものである。リッツ線は、束になった絶縁細線をフッ素系樹脂（たとえばテフロン（登録商標））などの外周絶縁層で覆う場合もある。   Conventionally, a litz wire obtained by bundling a plurality of insulating thin wires has been used as wiring for various devices. The insulated thin wire is a conductor wire made of copper, iron, aluminum, brass or the like covered with an insulating coating such as enamel. In some cases, litz wires cover a bundle of insulating thin wires with an outer peripheral insulating layer such as a fluororesin (for example, Teflon (registered trademark)).

しかし、リッツ線に高周波電流が流れると、近接効果によって、リッツ線の交流抵抗が増加し、リッツ線を使用する装置において損失が増加する。たとえばトランスやインダクターでは近接効果による損失量が増加する。   However, when a high-frequency current flows through the litz wire, the AC resistance of the litz wire increases due to the proximity effect, and the loss increases in a device that uses the litz wire. For example, the loss due to the proximity effect increases in transformers and inductors.

上記損失の増加を抑制するために、中心に中空部を備えたリッツ線が、下記の特許文献１に開示されている。リッツ線をより合わせたときに、中心に絶縁細線が無い。中心に絶縁細線が無いため、近接効果が低減され、損失の増加を抑制できる。   In order to suppress the increase in the loss, a litz wire having a hollow portion at the center is disclosed in Patent Document 1 below. There is no insulated wire in the center when litz wires are combined. Since there is no insulating thin wire at the center, the proximity effect is reduced and an increase in loss can be suppressed.

しかし、リッツ線の中心に絶縁細線が無いため、リッツ線が中心に向かって変形しやすい。リッツ線をトランスのコイルとして巻き回したときに、中空部がつぶれて無くなる可能性が高い。また、コイル以外にも種々の装置の配線として使用したときに、リッツ線が変形し、中空部が無くなる可能性が高い。中空部が無くなると低減された近接効果が元に戻り、損失も元に戻る。特許文献２のように介在物の外周に絶縁細線を巻き付けると中空部を維持できるが、部品数が多くなり好ましくない。   However, since there is no insulating thin wire at the center of the litz wire, the litz wire is easily deformed toward the center. When a litz wire is wound as a transformer coil, the hollow portion is likely to be crushed and lost. Further, when used as wiring for various devices other than coils, there is a high possibility that the litz wire is deformed and the hollow portion is eliminated. When the hollow portion disappears, the reduced proximity effect is restored and the loss is also restored. When an insulating fine wire is wound around the outer periphery of the inclusion as in Patent Document 2, the hollow portion can be maintained, but this is not preferable because the number of parts increases.

特開２００５−１０８６５４号公報JP 2005-108654 A 特開平６−１１９８２７号公報Japanese Patent Laid-Open No. 6-119827

本発明は、リッツ線の中心に中空部を形成し、近接効果を低減させることができるリッツ線を提供することを目的とする。   An object of this invention is to provide the litz wire which can form a hollow part in the center of a litz wire and can reduce a proximity effect.

本発明のリッツ線は、導体線を絶縁皮膜で覆った複数の絶縁細線と、前記絶縁細線の外周に形成された凹部および凸部と、前記絶縁細線同士の凹部と凸部が嵌め合わされ、かつ複数の絶縁細線が環状になることによって形成された中空部とを備える。本発明は、一の絶縁細線の凹部と他の絶縁細線の凸部が嵌め合わされ、断面が環状になり、中心に中空部が形成されている。   The litz wire of the present invention is a plurality of insulated thin wires in which a conductor wire is covered with an insulating film, a concave portion and a convex portion formed on the outer periphery of the insulating thin wire, and a concave portion and a convex portion between the insulating thin wires are fitted together, and And a hollow portion formed by forming a plurality of insulating thin wires into a ring shape. In the present invention, a concave portion of one insulating thin wire and a convex portion of another insulating thin wire are fitted together, the cross section is annular, and a hollow portion is formed at the center.

前記凹部を備えた絶縁細線と凸部を備えた絶縁細線の数が同数である。凹部と凸部の数が同じになり、嵌め合わせることができる。   The number of insulating thin wires provided with the concave portions and the number of insulating thin wires provided with convex portions are the same. The number of concave portions and convex portions is the same, and can be fitted together.

前記凸部と凹部が１本の絶縁細線に形成されており、複数の絶縁細線を環状にしたときに隣り合う絶縁細線の凸部と凹部が嵌め合わされる。上述した凸部と凹部は絶縁細線の接触部分の一部を突出させたり凹ませたりして形成しても良い。   The said convex part and a recessed part are formed in the one insulating fine wire, and when the some insulating thin wire is made into a ring, the convex part and recessed part of an adjacent insulating fine wire are fitted. The convex part and the concave part described above may be formed by projecting or denting a part of the contact portion of the insulating thin wire.

複数の前記リッツ線を子束とし、該子束を束ねて親束としても良い。子束を環状に束ねて親束としても良い。環状に束ねる場合、子束同士を嵌め合わせるための凹部と凸部を形成しても良い。前記子束同士を嵌め合わすための凹部と凸部は子束同士の接触部分の一部に形成されても良い。   A plurality of the litz wires may be used as a child bundle, and the child bundle may be bundled into a parent bundle. A child bundle may be bundled in a ring shape to form a parent bundle. When bundling in an annular shape, a concave portion and a convex portion for fitting the child bundles together may be formed. The concave portion and the convex portion for fitting the child bundles may be formed in a part of the contact portion between the child bundles.

本発明は、凹部と凸部が嵌め合わされることによって、絶縁細線同士の位置合わせが可能である。凹部と凸部とが嵌め合わされることによって、絶縁細線同士の相対的な位置を固定することもできる。そのため、中空部を形成し易く、リッツ線の変形時に中空部がつぶれにくい。中空部が維持されるため、近接効果による損失を抑制できる。   In the present invention, the insulating thin wires can be aligned with each other by fitting the concave portion and the convex portion. By fitting the concave and convex portions together, the relative positions of the insulated thin wires can be fixed. Therefore, it is easy to form the hollow portion, and the hollow portion is not easily crushed when the litz wire is deformed. Since the hollow portion is maintained, loss due to the proximity effect can be suppressed.

さらに隣り合う絶縁細線が凹部と凸部で嵌め合わせられるため、断面が円の絶縁細線同士でリッツ線を構成するよりも本発明のリッツ線の断面が小さくなる。本発明のリッツ線をトランスなどの装置に利用すると装置の小型化が可能になる。   Furthermore, since the adjacent insulating thin wire is fitted by the recessed part and the convex part, the cross section of the litz wire of the present invention is smaller than that of the litz wire formed by the insulating thin wires having a circular cross section. When the litz wire of the present invention is used in a device such as a transformer, the device can be downsized.

また、凹部と凸部を絶縁細線同士の接触部分の一部または子束同士の接触部分の一部に形成することによって、凹部と凸部が外れにくくなり、リッツ線の形状を崩しにくくなる。   Further, by forming the concave and convex portions at a part of the contact portion between the insulating thin wires or a part of the contact portion between the child bundles, the concave portion and the convex portion are not easily detached, and the shape of the litz wire is not easily broken.

本発明のリッツ線を示す斜視図である。It is a perspective view which shows the litz wire of this invention. 絶縁細線を示す断面図であり、（ａ）凹部を有する絶縁細線の断面図であり、（ｂ）は凸部を有する絶縁細線の断面図である。It is sectional drawing which shows an insulating thin line, (a) It is sectional drawing of the insulating thin line which has a recessed part, (b) is sectional drawing of the insulating thin line which has a convex part. 凹部と凸部を有する絶縁細線で構成したリッツ線を示す図であり、（ａ）はリッツ線の斜視図であり、（ｂ）は絶縁細線の断面図である。It is a figure which shows the litz wire comprised with the insulation thin wire which has a recessed part and a convex part, (a) is a perspective view of a litz wire, (b) is sectional drawing of an insulation thin wire. （ａ）は１本の絶縁細線が凹部と凸部を備えるリッツ線の断面図であり（ｂ）は従来のリッツ線を示す断面図である。(A) is sectional drawing of the litz wire in which one insulated thin wire is provided with a recessed part and a convex part, (b) is sectional drawing which shows the conventional litz wire. 絶縁細線同士の接触部分の一部を凹部または凸部にしたリッツ線を示す断面図である。It is sectional drawing which shows the litz wire which made a part of contact part of insulating thin wires the recessed part or the convex part. 図４における本発明と従来のリッツ線の交流抵抗の違いを示すグラフである。It is a graph which shows the difference in the alternating current resistance of this invention and the conventional litz wire in FIG. 三角形状の凹部と凸部を有するリッツ線の断面図であり、（ａ）は隣り合う絶縁細線同士の接触部分の全体を凹部または凸部にしたリッツ線であり、（ｂ）は隣り合う絶縁細線同士の接触部分の一部を凹部または凸部にしたリッツ線である。It is sectional drawing of the litz wire which has a triangular-shaped recessed part and a convex part, (a) is a litz wire which made the whole contact part of adjacent insulation fine wires into the recessed part or the convex part, (b) is adjacent insulation. It is a litz wire in which a part of the contact portion between the thin wires is a concave or convex portion. 図１のリッツ線を子束にしたリッツ線を示す図であり、（ａ）は子束を束ねて親束にした断面図であり、（ｂ）は中心の子束を除去した断面図である。It is a figure which shows the litz wire which made the litz wire of FIG. 1 a child bundle, (a) is sectional drawing which bundled the child bundle and made parent bundle, (b) is sectional drawing which removed the center child bundle is there. 各子束に凹部を設けたリッツ線の断面図である。It is sectional drawing of the litz wire which provided the recessed part in each child bundle. 方形のリッツ線の断面図である。It is sectional drawing of a square litz wire.

本発明のリッツ線について図面を用いて説明する。本発明のリッツ線はトランスのコイルなどに使用できるものである。   The litz wire of the present invention will be described with reference to the drawings. The litz wire of the present invention can be used for a coil of a transformer.

図１、２に示すリッツ線１０ａは、複数の絶縁細線１２、絶縁細線１２の外周の一部分である凹部１４または凸部１６、リッツ線１０ａの中心に形成された中空部１８を備える。   The litz wire 10a shown in FIGS. 1 and 2 includes a plurality of insulating thin wires 12, a concave portion 14 or a convex portion 16 that is a part of the outer periphery of the insulating thin wire 12, and a hollow portion 18 formed at the center of the litz wire 10a.

絶縁細線１２は、導体線２０を絶縁皮膜（図示省略）で覆ったものである。導体線２０は、銅、鉄、アルミニウム、黄銅などで構成される。導体線２０の断面は、断面の任意の点が表皮深さを超えない大きさにする。表皮深さをｄ、導体の抵抗をρ、電流の角周波数をω、導体の透磁率をμとすると、ｄ２=２ρ/ωμになる。導体線２０が銅、電流の周波数が１０ｋＨｚの場合、表皮深さｄは約０．６６ｍｍになる。 The insulating thin wire 12 is obtained by covering the conductor wire 20 with an insulating film (not shown). The conductor wire 20 is made of copper, iron, aluminum, brass or the like. The cross section of the conductor wire 20 is sized so that any point of the cross section does not exceed the skin depth. If the skin depth is d, the resistance of the conductor is ρ, the angular frequency of the current is ω, and the magnetic permeability of the conductor is μ, then d 2 = 2ρ / ωμ. When the conductor wire 20 is copper and the current frequency is 10 kHz, the skin depth d is about 0.66 mm.

絶縁皮膜は、ホルマールエナメルやポリウレタンエナメルなどの絶縁体で構成される。絶縁細線１２を束ねたときに、隣り合う絶縁細線１２同士が絶縁される。絶縁皮膜の厚みは、たとえば約０．０４５ｍｍである。   The insulating film is made of an insulator such as formal enamel or polyurethane enamel. When the insulating thin wires 12 are bundled, the adjacent insulating thin wires 12 are insulated from each other. The thickness of the insulating film is, for example, about 0.045 mm.

図１、２に示すように、絶縁細線１２の外周であり、かつ隣り合う絶縁細線１２の方向に、凹部１４または凸部１６が形成されている。したがって、絶縁細線１２の断面は円形ではない。異形線の製造が可能なタークスヘッドやカセットローラーダイスによって、凹部１４または凸部１６を有する導体線２０を形成し、その導体線２０を絶縁被膜で覆う。また、絶縁皮膜で覆われた導体線２０に凹部１４または凸部１６を形成させても良い。凹部１４と凸部１６は隙間無く嵌め合わされ、他の実施例においても同様である。   As shown in FIGS. 1 and 2, a concave portion 14 or a convex portion 16 is formed on the outer periphery of the insulating fine wire 12 and in the direction of the adjacent insulating fine wire 12. Therefore, the cross section of the insulating thin wire 12 is not circular. A conductor wire 20 having the concave portion 14 or the convex portion 16 is formed by a turks head or a cassette roller die capable of manufacturing a deformed wire, and the conductor wire 20 is covered with an insulating film. Moreover, you may form the recessed part 14 or the convex part 16 in the conductor wire 20 covered with the insulating film. The concave portion 14 and the convex portion 16 are fitted with no gap, and the same applies to other embodiments.

後述するように、凹部１４と凸部１６が嵌め合わされるため、凹部１４を有する絶縁細線１２と凸部１６を有する絶縁細線１２の数は同数である。図１では絶縁細線１２の本数が６本であるが、絶縁細線１２の本数は限定されない。凸部１６と凹部１４を嵌め合わせた後または嵌め合わせる際に、絶縁細線１２同士を接着剤などの固定材料で固定しても良い。   As will be described later, since the concave portions 14 and the convex portions 16 are fitted together, the number of the insulating thin wires 12 having the concave portions 14 and the number of the insulating thin wires 12 having the convex portions 16 are the same. In FIG. 1, the number of insulating thin wires 12 is six, but the number of insulating thin wires 12 is not limited. The insulating thin wires 12 may be fixed together with a fixing material such as an adhesive after the convex portion 16 and the concave portion 14 are fitted together or when fitting.

複数の絶縁細線１２が束ねられ、より合わせられることによりリッツ線１０ａになる。リッツ線１０ａの断面が環状になるように絶縁細線１２を配置する。リッツ線１０ａの中心に中空部１８が形成される。絶縁細線１２を配置するときに、隣り合う絶縁細線１２の凹部１４と凸部１６が嵌め合わされる。すなわち、隣り合う絶縁細線１２の一部分同士が嵌め合わされる。なお、複数の絶縁細線１２をより合わせずに直線状のままで束ねたリッツ線１０ａであっても良い。   A plurality of insulating thin wires 12 are bundled and are combined to form a litz wire 10a. The insulating thin wire 12 is arranged so that the cross section of the litz wire 10a is annular. A hollow portion 18 is formed at the center of the litz wire 10a. When the insulating thin wire 12 is disposed, the concave portion 14 and the convex portion 16 of the adjacent insulating thin wire 12 are fitted together. That is, a part of the adjacent insulating thin wires 12 are fitted together. In addition, the litz wire 10a may be a bundle of a plurality of thin insulating wires 12 that are bundled in a straight line without being more aligned.

リッツ線１０ａは、外周絶縁層２２で覆われても良い。外周絶縁層２２は、フッ素系樹脂（たとえばテフロン（登録商標））などである。   The litz wire 10 a may be covered with the outer peripheral insulating layer 22. The outer peripheral insulating layer 22 is made of a fluorine-based resin (for example, Teflon (registered trademark)).

凹部１４と凸部１６が嵌め合わされることによって、絶縁細線１２同士の位置合わせが可能であり、絶縁細線１２同士の相対的な位置を固定することもできる。そのため、中空部１８を形成し易い。リッツ線１０ａがトランスなどに使用されて巻き回されても絶縁細線１２同士の相対的な位置が固定されているため、中空部１８がつぶれにくい。中空部１８があるため、近接効果による損失を抑制できる。   By fitting the concave portions 14 and the convex portions 16, the insulating thin wires 12 can be aligned with each other, and the relative positions of the insulating thin wires 12 can be fixed. Therefore, it is easy to form the hollow portion 18. Even if the litz wire 10a is used for a transformer or the like and wound, the relative position between the insulated thin wires 12 is fixed, so that the hollow portion 18 is not easily crushed. Since there is the hollow portion 18, loss due to the proximity effect can be suppressed.

本発明は、従来のリッツ線に使用された介在物が無い。さらに隣り合う絶縁細線１２が凹部１４と凸部１６で嵌め合わせられる。そのため、断面が円の絶縁細線同士でリッツ線を構成するよりも本発明のリッツ線１０ａの断面が小さくなる。本発明のリッツ線１０ａをトランスなどの装置に利用すると装置の小型化が可能になる。   The present invention is free of inclusions used in conventional litz wires. Further, adjacent insulating thin wires 12 are fitted together by the concave portions 14 and the convex portions 16. Therefore, the cross-section of the litz wire 10a of the present invention is smaller than that of the litz wire formed by insulating thin wires having a circular cross-section. When the litz wire 10a of the present invention is used in a device such as a transformer, the size of the device can be reduced.

図１に示す絶縁細線１２のぞれぞれは、凹部１４または凸部１６のいずれかが形成されている。図３に示す凹部１４と凸部１６の両方を備えた絶縁細線１２であっても良い。各絶縁細線１２の形状を同じにすることによって、絶縁細線１２の製造装置を少なくでき、絶縁細線１２やリッツ線１０ｂのコストダウンが可能になる。同形状の絶縁細線１２を環状にするため、２種類の絶縁細線１２を使用したリッツ線１０ａに比べて、リッツ線１０ｂの形成が簡単になる。   Each of the insulating thin wires 12 shown in FIG. 1 is formed with either a concave portion 14 or a convex portion 16. The insulating thin wire 12 having both the concave portion 14 and the convex portion 16 shown in FIG. 3 may be used. By making the shape of each insulating thin wire 12 the same, the manufacturing apparatus of the insulating thin wire 12 can be reduced, and the cost of the insulating thin wire 12 and the litz wire 10b can be reduced. Since the insulating thin wire 12 having the same shape is formed into a ring shape, the formation of the litz wire 10b is simplified as compared with the litz wire 10a using two types of insulating thin wires 12.

また、図４（ａ）に示すリッツ線１０ｂ'のように、隣り合う絶縁細線１２同士の接触部分の一部を突出させて凸部１６にしても良い。凸部１６を設ける位置は、絶縁細線１２同士の接触部分の中央であり、凸部１６が凹部１４に嵌め合わされたときに最も外れにくい位置である。絶縁細線１２には、凸部１６に嵌め合わせる凹部１４が凸部１６に対する周方向の反対側に形成される。この凹部１４と凸部１６は１本の絶縁細線１２に形成されており、リッツ線１０ｂ'は同形状の絶縁細線１２を使用している。凸部１６はリッツ線１０ｂ'の周方向を向いており、隣り合う絶縁細線１２の凹部１４に凸部１６が嵌め合わされ、複数の絶縁細線１２で環状になる。凸部１６の先端が半円弧状になっており、凹部１４の底は半円弧状に凹んでいる。   Further, as in the litz wire 10 b ′ shown in FIG. 4A, a part of the contact portion between the adjacent insulating thin wires 12 may be protruded into the convex portion 16. The position where the convex portion 16 is provided is the center of the contact portion between the insulating thin wires 12 and is the position where the convex portion 16 is most unlikely to come off when the convex portion 16 is fitted into the concave portion 14. The insulating thin wire 12 is formed with a concave portion 14 fitted to the convex portion 16 on the opposite side in the circumferential direction with respect to the convex portion 16. The concave portion 14 and the convex portion 16 are formed in one insulating thin wire 12, and the litz wire 10b 'uses the insulating thin wire 12 having the same shape. The convex portion 16 faces the circumferential direction of the litz wire 10 b ′, and the convex portion 16 is fitted into the concave portion 14 of the adjacent insulating thin wire 12, and becomes a ring shape with the plurality of insulating thin wires 12. The tip of the convex portion 16 has a semicircular arc shape, and the bottom of the concave portion 14 has a semicircular arc shape.

図４（ａ）のリッツ線１０ｂ'は、図１や図３に比べて凸部１６の高さｈが高くなっており、絶縁細線１２同士がバラバラになりにくい。例えば、凸部１６の高さｈ（突出した長さ）は先端の円弧を含む円ｃの直径とほぼ同じである。他の実施例においても凸部１６の高さｈを高くしても良い。実施例１を図４（ａ）と同様にすると、図５のリッツ線１０ａ'のようになる。リッツ線１０ａ'は、凸部１６のみを有する絶縁細線１２と凹部１４のみを有する絶縁細線１２が同数であり、隣り合う絶縁細線１２同士の凹部１４と凸部１６が嵌め合わされている。また、凸部１６の高さｈは円ｃの直径とほぼ同じであるが、直線や曲線を組み合わせて凸部１６の高さをさらに高くしても良い。   In the litz wire 10b ′ in FIG. 4A, the height h of the convex portion 16 is higher than that in FIGS. 1 and 3, and the insulating thin wires 12 are not easily separated. For example, the height h (projected length) of the convex portion 16 is substantially the same as the diameter of the circle c including the tip arc. In other embodiments, the height h of the convex portion 16 may be increased. If Example 1 is made the same as FIG. 4A, a litz wire 10a ′ in FIG. 5 is obtained. In the litz wire 10a ′, the same number of insulating thin wires 12 having only the convex portions 16 and the insulating thin wires 12 having only the concave portions 14 are provided, and the concave portions 14 and the convex portions 16 of the adjacent insulating thin wires 12 are fitted together. Moreover, although the height h of the convex part 16 is substantially the same as the diameter of the circle c, the height of the convex part 16 may be further increased by combining straight lines and curves.

図４（ａ）、（ｂ）に示す本発明のリッツ線１０ｂ'と従来のリッツ線１００の高周波電流と交流抵抗の関係を図６に示す。従来のリッツ線１００を基準として、本発明のリッツ線１０ｂ'は絶縁細線１２の合計断面積を同じにした場合と外形（外周形状）を同じにした場合を示す。ここで、外形は外周絶縁層２２の大きさである。絶縁細線１２、１０２の合計断面積は、従来のリッツ線１００が０．４９ｍｍ２である。本発明のリッツ線１０ｂ'の絶縁細線１２の合計断面積は０．４８ｍｍ２と０．５７ｍｍ２でる。絶縁細線１２の合計断面積が０．５７ｍｍ２の場合、外形が従来のリッツ線１００と同じ大きさになっている。絶縁細線１２の合計断面積が０．４８ｍｍ２の場合、合計断面積が従来のリッツ線１００とほぼ同じであるが、外形が従来よりも小さくなる。 FIG. 6 shows the relationship between the high-frequency current and the AC resistance of the litz wire 10b ′ of the present invention and the conventional litz wire 100 shown in FIGS. 4 (a) and 4 (b). Based on the conventional litz wire 100, the litz wire 10b ′ of the present invention shows a case where the total cross-sectional area of the insulating thin wire 12 is the same and a case where the outer shape (outer peripheral shape) is the same. Here, the outer shape is the size of the outer peripheral insulating layer 22. The total cross-sectional area of the insulating thin wires 12 and 102 is 0.49 mm 2 for the conventional litz wire 100. The total cross-sectional area of the insulating thin wire 12 of the litz wire 10b ′ of the present invention is 0.48 mm 2 and 0.57 mm 2 . When the total cross-sectional area of the insulating thin wire 12 is 0.57 mm 2 , the outer shape is the same size as the conventional litz wire 100. When the total cross-sectional area of the insulating thin wire 12 is 0.48 mm 2 , the total cross-sectional area is almost the same as that of the conventional litz wire 100, but the outer shape is smaller than that of the conventional one.

図６から、従来と外形を同じにすれば、交流抵抗を全ての周波数で下げることができることが分かる。従来と外形を同じにすれば、近接効果を小さくして、高周波電流の流れやすいリッツ線１０ｂ'にすることができる。また、絶縁細線１２の合計断面積が同じまたはほぼ同じであれば、高周波電流になるほど、本発明のリッツ線１０ｂ'の交流抵抗が小さくなる。本発明のリッツ線１０ｂ'をトランスやモータなどに用いた場合、製品の小型化が可能になり、高周波電流では抵抗を小さくでき、損失を小さくできる。   From FIG. 6, it can be seen that the AC resistance can be lowered at all frequencies if the outer shape is the same as that of the conventional one. If the outer shape is the same as the conventional one, the proximity effect can be reduced, and the litz wire 10b ′ in which the high-frequency current easily flows can be obtained. Moreover, if the total cross-sectional area of the insulated thin wire 12 is the same or substantially the same, the alternating current resistance of the litz wire 10b ′ of the present invention becomes smaller as the current becomes higher. When the litz wire 10b ′ of the present invention is used for a transformer, a motor, etc., the product can be miniaturized, and the resistance can be reduced and the loss can be reduced with a high-frequency current.

曲線状になった凹部１４または凸部１６に限定されない。たとえば、図７（ａ）のリッツ線１０ｃのように、絶縁細線１２の断面が三角形状の凹部１４や凸部１６であっても良い。また、図７（ｂ）のリッツ線１０ｃ'のように、隣り合う絶縁細線１２の接触部分の一部を三角形状にして凸部１６にしても良い。また、その凸部１６に嵌め合わされる凹部１４を隣り合う絶縁細線１２に形成する。さらに、三角形状に限定されず、直線を使用した他の形状であっても良く、角などは多少の丸みがあっても良い。凸部１６と凹部１４が嵌め合わされることで、絶縁細線１２がバラバラになりにくい。   It is not limited to the recessed part 14 or the convex part 16 which became curvilinear. For example, like the litz wire 10c in FIG. 7A, the insulating thin wire 12 may have a triangular concave portion 14 or convex portion 16 in cross section. Further, as in the litz wire 10c ′ in FIG. 7B, a part of the contact portion between the adjacent insulating thin wires 12 may be triangular to form the convex portion 16. Moreover, the recessed part 14 fitted by the convex part 16 is formed in the adjacent insulating fine wire 12. FIG. Furthermore, the shape is not limited to a triangular shape, and may be other shapes using straight lines, and the corners may be somewhat rounded. By fitting the convex portion 16 and the concave portion 14 together, the insulating thin wire 12 is not easily separated.

図８（ａ）のように、実施例１などに示すリッツ線１０ａを子束２４として、複数の子束２４を束ねたリッツ線１０ｄであっても良い。束ねるときに、複数の子束２４をより合わせて親束２６にする。従来のリッツ線に比べて中空部１８を有するため、近接効果による損失を抑制できる。なお、親束２６の外周に外周絶縁層２２を設けても良い。子束２４は実施例１のリッツ線１０ａに限定されず、他の実施例のリッツ線１０ｂ等であっても良い。   As illustrated in FIG. 8A, the litz wire 10 d obtained by bundling a plurality of child bundles 24 using the litz wire 10 a illustrated in the first embodiment as the child bundle 24 may be used. When bundled, a plurality of child bundles 24 are combined into a parent bundle 26. Since it has the hollow part 18 compared with the conventional litz wire, the loss by a proximity effect can be suppressed. The outer peripheral insulating layer 22 may be provided on the outer periphery of the parent bundle 26. The child bundle 24 is not limited to the litz wire 10a of the first embodiment, and may be the litz wire 10b of another embodiment.

図８（ｂ）のように、リッツ線１０ｅの中心の子束２４を除去し、環状に束ねた構成であっても良い。中心が大きな中空部２８となる。この大きな中空部２８によって、さらに近接効果による損失を抑制できる。   As shown in FIG. 8B, a configuration may be adopted in which the child bundle 24 at the center of the litz wire 10e is removed and bundled in an annular shape. The center becomes a large hollow portion 28. The large hollow portion 28 can further suppress loss due to the proximity effect.

図８（ｂ）の場合に、図２（ａ）、（ｂ）に示す絶縁細線１２にある凹部１４または凸部１６が子束２４の外周にも形成されるようにしても良い。絶縁細線１２を束ねて子束２４を形成した後、タークスヘッドやカセットローラーダイスによって、各子束２４の外周を図２（ａ）、（ｂ）に示すような凹部１４または凸部１６を有する外周にする。子束２４同士が凹部１４または凸部１６で嵌め合わされ、位置決めができ、位置ずれを防止することができる。リッツ線の変形時に、中心の大きな中空部２８が維持されやすい。なお、子束２４の外周は、図３、図４（ａ）または図７に示す凹部１４や凸部１６を有する形状にしても良い。   In the case of FIG. 8B, the concave portion 14 or the convex portion 16 in the insulating thin wire 12 shown in FIGS. 2A and 2B may be formed on the outer periphery of the child bundle 24. After the insulating thin wires 12 are bundled to form the child bundle 24, the outer periphery of each child bundle 24 has a concave portion 14 or a convex portion 16 as shown in FIGS. 2A and 2B by a turks head or a cassette roller die. Make the outer circumference. The child bundles 24 are fitted to each other at the concave portion 14 or the convex portion 16, positioning can be performed, and displacement can be prevented. When the litz wire is deformed, the large hollow portion 28 is easily maintained. The outer periphery of the child bundle 24 may have a shape having the concave portion 14 and the convex portion 16 shown in FIG. 3, FIG. 4A or FIG.

また、図９のリッツ線１０ｆのように、凹部３０のみを子束２４に形成し、他の子束２４が凹部３０に嵌め合わされても良い。子束２４の外周の円弧が凸部となり、凹部３０に嵌め合わされる。子束２４同士がバラバラになりにくくなっている。   Further, like the litz wire 10 f in FIG. 9, only the recess 30 may be formed in the child bundle 24, and the other child bundle 24 may be fitted into the recess 30. The arc of the outer periphery of the child bundle 24 becomes a convex portion and is fitted into the concave portion 30. The child bundles 24 are less likely to fall apart.

また、図４（ａ）と同様に、子束２４同士の接触部分の一部を突出させて凸部を形成し、さらに隣り合う子束２４の接触部分に凸部が嵌め合わされる凹部を設けても良い。１本の子束２４に凸部と凹部の両方を形成しても良いし、凸部のみを形成した子束２４と凹部のみを形成した子束２４を備えても良い。凸部のみを形成した子束２４と凹部のみを形成した子束２４は同数になる。   Similarly to FIG. 4A, a part of the contact portion between the child bundles 24 is protruded to form a convex portion, and a concave portion is provided in which the convex portion is fitted to the contact portion of the adjacent child bundle 24. May be. Both a convex part and a recessed part may be formed in one child bundle 24, or a child bundle 24 having only a convex part and a child bundle 24 having only a concave part may be provided. The number of child bundles 24 in which only convex portions are formed is the same as the number of child bundles 24 in which only concave portions are formed.

上記の各実施例はリッツ線１０ａの断面が円形の環状になっていたが、環状であれば円形に限定されない。図１０のように、リッツ線１０ｇの断面が方形の環状になり、中心に中空部１８が形成されていても良い。各絶縁細線１２に凹部１４および凸部１６が形成されていて、一の絶縁細線１２の凹部１４と隣り合う絶縁細線１２の凸部１６が嵌め合わされる。凸部１６と凹部１４は、図４（ａ）と同様の凸部１６と凹部１４であっても良い。また、リッツ線１０ｇを子束２４にして図８や９のように束ねても良い。   In each of the above-described embodiments, the cross-section of the litz wire 10a is a circular ring shape, but is not limited to a circular shape as long as it is circular. As shown in FIG. 10, the cross section of the litz wire 10 g may be a square ring, and the hollow portion 18 may be formed at the center. A concave portion 14 and a convex portion 16 are formed in each insulating thin wire 12, and the convex portion 16 of the insulating thin wire 12 adjacent to the concave portion 14 of one insulating thin wire 12 is fitted. The convex portion 16 and the concave portion 14 may be the same convex portion 16 and concave portion 14 as in FIG. Further, the litz wire 10g may be bundled as shown in FIGS.

上記の各実施例はリッツ線１０ａの中心に中空部１８を設けていたが、中空部１８を形成する代わりに、リッツ線１０ａの中心に中空部１８と同等の誘電体の部材を配置しても良い。誘電体の部材に絶縁細線１２を巻き付けるようにしてリッツ線を製造する。中空部１８を形成するよりもリッツ線を製造しやすい。子束２４を束ねた場合であっても、各子束２４の中空部１８と中心の大きな中空部２８に誘電体の部材を配置しても良い。リッツ線１０ａを曲げたときに、誘電体の部材によって中空部１８に相当する部分がつぶれない。リッツ線１０ａの断面形状を維持できる。誘電体の部材の誘電率は空気と一致させるだけでなく、適宜変更しても良い。   In each of the above embodiments, the hollow portion 18 is provided at the center of the litz wire 10a. Instead of forming the hollow portion 18, a dielectric member equivalent to the hollow portion 18 is disposed at the center of the litz wire 10a. Also good. A litz wire is manufactured by winding the insulating thin wire 12 around a dielectric member. It is easier to manufacture a litz wire than to form the hollow portion 18. Even when the child bundles 24 are bundled, a dielectric member may be disposed in the hollow portion 18 and the large hollow portion 28 of each child bundle 24. When the litz wire 10a is bent, the portion corresponding to the hollow portion 18 is not crushed by the dielectric member. The cross-sectional shape of the litz wire 10a can be maintained. The dielectric constant of the dielectric member is not only matched with air, but may be changed as appropriate.

その他、本発明は、その主旨を逸脱しない範囲で当業者の知識に基づき種々の改良、修正、変更を加えた態様で実施できるものである。各実施例は独立的または排他的なものではなく、適宜組み合わせて実施しても良い。   In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Each embodiment is not independent or exclusive, and may be implemented in combination as appropriate.

１０ａ、１０ａ'、１０ｂ、１０ｂ'、１０ｃ、１０ｃ'、１０ｄ、１０ｅ、１０ｆ、１０ｇ：リッツ線
１２：絶縁細線
１４、３０：凹部
１６：凸部
１８、２８：中空部
２０：導体線
２２：外周絶縁層
２４：子束
２６：親束 10a, 10a ', 10b, 10b', 10c, 10c ', 10d, 10e, 10f, 10g: Litz wire 12: Insulating thin wire 14, 30: Concave portion 16: Convex portion 18, 28: Hollow portion 20: Conductor wire 22: Outer peripheral insulating layer 24: child bundle 26: parent bundle

Claims (8)

導体線を絶縁皮膜で覆った複数の絶縁細線を環状に配置して中心に中空部を形成したリッツ線であって、
前記絶縁細線の外周に、隣り合う絶縁細線同士を嵌め合わすための凹部と凸部が形成されたリッツ線。 A litz wire in which a plurality of fine insulating wires covered with an insulating film are arranged in an annular shape and a hollow portion is formed in the center,
A litz wire in which a concave portion and a convex portion for fitting adjacent insulating thin wires are formed on the outer periphery of the insulating thin wire. 前記凸部と凹部が１本の絶縁細線に形成されており、複数の絶縁細線を環状にしたときに隣り合う絶縁細線の凸部と凹部が嵌め合わされる請求項１のリッツ線。 The litz wire according to claim 1, wherein the convex portions and the concave portions are formed in one insulating thin wire, and the convex portions and the concave portions of adjacent insulating thin wires are fitted together when a plurality of insulating thin wires are formed into an annular shape. 前記凹部を備えた絶縁細線と凸部を備えた絶縁細線の数が同数である請求項１のリッツ線。 The litz wire according to claim 1, wherein the number of insulating fine wires provided with the concave portions and the number of insulating fine wires provided with convex portions are the same. 前記凸部が絶縁細線同士の接触部分の一部を突出させて形成された請求項１から３のいずれかのリッツ線。 The litz wire according to any one of claims 1 to 3, wherein the convex portion is formed by protruding a part of a contact portion between the insulating thin wires. 複数の前記リッツ線を子束とし、該子束を束ねて親束とした請求項１から４のいずれかのリッツ線。 The litz wire according to any one of claims 1 to 4, wherein a plurality of the litz wires are used as a child bundle, and the child bundle is bundled into a parent bundle. 前記子束を環状に束ねた請求項５のリッツ線。 The litz wire according to claim 5, wherein the child bundles are bundled in an annular shape. 隣り合う前記子束同士を嵌め合わすための凹部と凸部が形成された請求項６のリッツ線。 The litz wire according to claim 6, wherein a concave portion and a convex portion for fitting adjacent child bundles are formed. 前記子束同士を嵌め合わすための凹部と凸部が子束同士の接触部分の一部に形成された請求項７のリッツ線。 The litz wire according to claim 7, wherein a concave portion and a convex portion for fitting the child bundles are formed in a part of a contact portion between the child bundles.
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