JP6090045B2 - Manufacturing method of collective conducting wire - Google Patents
Manufacturing method of collective conducting wire Download PDFInfo
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- JP6090045B2 JP6090045B2 JP2013160595A JP2013160595A JP6090045B2 JP 6090045 B2 JP6090045 B2 JP 6090045B2 JP 2013160595 A JP2013160595 A JP 2013160595A JP 2013160595 A JP2013160595 A JP 2013160595A JP 6090045 B2 JP6090045 B2 JP 6090045B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
本発明は、複数の素線からなる集合導線の製造方法に関するものである。 The present invention relates to a method for manufacturing a collective conducting wire composed of a plurality of strands.
モータを構成するステータは、円環状のヨークと、ヨークから径方向内側に突出する複数のティースと、隣接するティース間に形成されるスロットを備えた鋼板が積層されてなるステータコアから形成されており、コイルがこのスロット内に挿入されながら、ティース間に巻装されることによってステータが形成される。このコイル用の巻線は、導線周りに絶縁被膜が形成されてコイル内における導線間の絶縁が図られるとともに、ティースとコイルの間には絶縁性のボビンや絶縁紙等のインシュレータが配設されてコア−コイル間の絶縁が図られている。さらに、たとえば分布巻き方式の巻装形態においては、絶縁紙等のインシュレータで異相コイル間の相間絶縁が図られている。 The stator constituting the motor is formed of a stator core formed by laminating an annular yoke, a plurality of teeth projecting radially inward from the yoke, and a steel plate having a slot formed between adjacent teeth. The stator is formed by being wound between the teeth while the coil is inserted into the slot. The coil winding has an insulating coating formed around the conductors to insulate the conductors in the coil, and an insulator such as an insulating bobbin or insulating paper is disposed between the teeth and the coil. Thus, insulation between the core and the coil is achieved. Further, for example, in a distributed winding type winding form, interphase insulation between different-phase coils is achieved by an insulator such as insulating paper.
従来のコイル形成用の巻線は、たとえば銅素材の導線の周りに、熱硬化性のエナメル樹脂を溶剤に溶かして数μmの厚みで塗布し、熱処理して塗布層を固め、この処理を複数回繰り返して所望厚のエナメル被膜を形成して巻線が製作されている。なお、このエナメル被膜の素材としては、アミドイミド系樹脂やウレタン系樹脂、エステルイミド系樹脂、ポリイミド系樹脂や酸化膜などが一般に用いられている。なお、巻線は断面が円形のもののほかにも、コイル占積率を高めることのできる平角線が適用されている。 For example, a conventional coil forming winding is made by dissolving a thermosetting enamel resin in a solvent and applying it to a thickness of several μm around a copper conductor, and heat-treating it to harden the coating layer. The winding is manufactured by forming the enamel film having a desired thickness by repeating the process. In general, an amidoimide resin, a urethane resin, an esterimide resin, a polyimide resin, an oxide film, or the like is used as a material for the enamel coating. In addition to the winding having a circular cross section, a rectangular wire capable of increasing the coil space factor is applied.
ところで、たとえばハイブリット車や電気自動車の駆動モータを構成するコイル用の巻線として上記する断面円形の巻線や平角線を適用するに当たり、コイルの占積率のさらなる向上やトルクの向上を目的として巻線の断面積が大きくなる傾向にあるが、断面積が大きくなるにつれて渦電流損失が増大する。 By the way, for example, when applying the above-described circular winding or rectangular wire as a winding for a coil constituting a drive motor of a hybrid vehicle or an electric vehicle, for the purpose of further improving the coil space factor and improving torque. Although the cross-sectional area of the winding tends to increase, eddy current loss increases as the cross-sectional area increases.
この渦電流損失への対策として、導線の断面を分割して小断面とし、この小断面の導線周りに絶縁被膜を形成して小断面の素線とし、この素線を束ねて形成された集合導線を適用する方法が注目されている。 As a countermeasure against this eddy current loss, the conductor cross-section is divided into small cross sections, an insulation coating is formed around the small cross-section conductors to form small cross-section strands, and the bundle formed by bundling these strands Attention has been focused on the method of applying conducting wires.
たとえば、特許文献1にも断面円形の素線(エナメル線)を撚り合わせ、圧延して形成された平角リッツ線が開示されている。
For example,
上記する集合導線の製造においては複数の素線を束ねて一体化するが、この加工の際に、導線周りのエナメル被膜等の絶縁被膜が破れる怖れがあり、溶接時の発泡も懸念される。また、エナメル被膜にて十分な損失低減効果を得るためには少なくとも10μm程度の厚みを必要とするため、このエナメル被膜の厚みがコイル占積率の低下の要因となっている。 In the production of the assembly conductor described above, a plurality of strands are bundled and integrated, but during this processing, there is a fear that the insulating coating such as enamel coating around the conducting wire may be broken, and there is a concern about foaming during welding. . Further, in order to obtain a sufficient loss reduction effect with the enamel coating, a thickness of at least about 10 μm is required, and thus the thickness of the enamel coating is a factor of a decrease in the coil space factor.
本発明は上記する問題に鑑みてなされたものであり、断面が円形の複数の素線を束ねて平角線化して集合導線を製造する集合導線の製造方法に関し、平角線化の際に素線周りの絶縁被膜が破れるといった問題がなく、さらに渦電流損失低減効果に優れ、コイル占積率の高い集合導線の製造方法を提供することを目的とする。 The present invention has been made in view of the problems described above, and relates to a method of manufacturing an assembly conductor in which a plurality of strands having a circular cross section are bundled into a rectangular wire to manufacture an assembly conductor. It is an object of the present invention to provide a method of manufacturing a collective conducting wire that has no problem of breaking the surrounding insulating coating, has an excellent eddy current loss reduction effect, and has a high coil space factor.
前記目的を達成すべく、本発明による集合導線の製造方法は、断面が円形の銅素材の導線と、該導線の周囲に配設された銅よりも電気抵抗が高くて非磁性の絶縁被膜である金属被膜と、から構成される、絶縁被膜を具備した素線と、
断面が円形の銅素材の導線であって絶縁被膜を具備しない素線と、をそれぞれ複数用意し、
前記絶縁被膜を具備した素線と前記絶縁被膜を具備しない素線を隣接させ、該絶縁被膜を具備した素線と該絶縁被膜を具備しない素線を左右および上下で千鳥配置して束ね、
束ねられた複数の前記素線をダイスもしくはロールに収容して各素線の平角線化を図って一体化させ、絶縁被膜を具備した平角素線と絶縁被膜を具備しない裸の平角素線が上下および左右で千鳥配置となっている集合導線を製造するものである。
In order to achieve the above object, a method of manufacturing a collective conducting wire according to the present invention includes a copper conductor having a circular cross section and a nonmagnetic insulating coating having a higher electrical resistance than copper disposed around the conducting wire. A wire comprising an insulating coating composed of a metal coating;
A plurality of wires each having a circular copper cross section and not having an insulating coating,
Adjacent a wire having the insulating film and a wire not having the insulating film, and bundling the element wire having the insulating film and the wire not having the insulating film in a staggered arrangement on the left and right and top and bottom,
A plurality of bundled strands are accommodated in dies or rolls, and the strands of each strand are converted into a flat wire and integrated, and a flat rectangular wire having an insulating coating and a bare rectangular strand not having an insulating coating are obtained. The assembly conductors are arranged in a staggered arrangement on the top and bottom and on the left and right .
本発明の集合導線の製造方法は、素線の周りにエナメル被膜に代わってアルミニウムやその合金など、銅素材の導線よりも電気抵抗が高く、かつ非磁性素材の金属被膜(アルミクラッド被膜など)を適用するものである。 The method for producing a collective conducting wire of the present invention is a metal coating (such as an aluminum clad coating) having a higher electrical resistance than a copper-based conducting wire such as aluminum or an alloy thereof instead of an enamel coating around the strands and a non-magnetic material. Is applied.
ここで、集合導線を構成する複数の断面円形の素線に関し、全ての素線が周囲に金属被膜を有している形態のほか、束ねた姿勢で隣接する素線の一方が金属被膜を有し、他方が金属被膜を具備しない形態(金属被膜を具備する素線と具備しない素線が千鳥配置となっている形態)であっても各素線の絶縁を図ることができる。 Here, regarding a plurality of cross-sectional strands constituting the assembly conductor, all strands have a metal coating around them, and one of adjacent strands in a bundled posture has a metal coating. However, even if the other side does not have a metal coating (a configuration in which a strand having a metal coating and a strand having no metal coating are in a staggered arrangement), each strand can be insulated.
非磁性の金属被膜を適用することで、断面が円形の銅素材の素線を複数本束ねて平角線化する際に、金属被膜が破れるといった課題は生じ得ず、溶接時の発泡の問題も生じないことから、加工性と溶接性に優れた集合導線となる。 By applying a non-magnetic metal coating, there is no problem of breaking the metal coating when bundling multiple strands of copper material with a circular cross section, and foaming problems during welding Since it does not occur, it becomes a collective conducting wire excellent in workability and weldability.
また、金属被膜にて十分な損失低減効果を得ることができ、かつ均等な厚みの被膜を形成するには数百nm程度の厚みで十分であることから、エナメル被膜が適用された集合導線に比してコイル占積率は格段に向上する。 In addition, a sufficient loss reduction effect can be obtained with a metal coating, and a thickness of about several hundreds of nanometers is sufficient to form a coating with a uniform thickness. In comparison, the coil space factor is significantly improved.
以上の説明から理解できるように、本発明の集合導線の製造方法によれば、素線の全部もしくは一部の周囲に銅よりも電気抵抗が高く、非磁性の金属被膜が形成されていることにより、絶縁被膜の破れや溶接時の発砲の問題が解消され、損失低減効果に優れ、コイル占積率を高くすることができる。 As can be understood from the above description, according to the collective conducting wire manufacturing method of the present invention, a nonmagnetic metal film having a higher electrical resistance than copper is formed around all or part of the strands. As a result, the problem of breakage of the insulating coating and firing during welding can be solved, the loss reduction effect is excellent, and the coil space factor can be increased.
以下、図面を参照して本発明の集合導線の実施の形態を説明する。なお、集合導線を構成する素線の本数は図示例に限定されるものでないことは勿論のことである。 Hereinafter, embodiments of the collective conducting wire of the present invention will be described with reference to the drawings. Needless to say, the number of wires constituting the assembly conducting wire is not limited to the illustrated example.
(集合導線の実施の形態1)
図1aは本発明の集合導線の製造方法を説明した図であり、図1bは図1aに続いて製造方法を説明するとともに本発明の集合導線の実施の形態1を示した模式図である。
(
FIG. 1a is a diagram for explaining a method for manufacturing a collective conducting wire according to the present invention, and FIG. 1b is a schematic diagram for explaining the manufacturing method following FIG. 1a and showing
まず、断面円形で銅素材の導線1の周りに、銅よりも電気抵抗が高く、非磁性の金属被膜2が形成された複数の素線3を用意する。
First, a plurality of
ここで、金属被膜2の素材としては、アルミニウム、ステンレス、白金、チタンやこれらの合金などを適用でき、いずれの素材も、銅よりも電気抵抗が高く、非磁性であることに加えて加工性が良好である。
Here, as the material of the
図1aで示すように、断面円形の複数の素線3を束ね、不図示のダイスやロールに収容して各素線3の平角線化を図り、一体化させることにより、図1bで示すように、平角導線1’の周囲に略矩形の絶縁被膜2’が形成された平角素線4が一体化されてなる集合導線10が製造される。なお、複数の素線3を束ねる形態においては、素線同士を撚ることで束ねる形態や編み込むことで束ねる形態などがある。
As shown in FIG. 1a, a plurality of
絶縁被膜2’は非磁性の金属素材であることから、十分な損失低減効果を得ることができ、かつ均等な厚みの被膜を形成するに当たって数百nm程度の厚みで十分であることから、エナメル被膜が適用された集合導線に比してコイル占積率は格段に向上する。 Since the insulating coating 2 'is a non-magnetic metal material, a sufficient loss reduction effect can be obtained, and a thickness of about several hundreds of nanometers is sufficient to form a uniform coating. The coil space factor is remarkably improved as compared with the collective conducting wire to which the coating is applied.
図示する集合導線10によれば、平角素線4の周囲に銅よりも電気抵抗が高く、非磁性の金属被膜2’が形成されていることにより、絶縁被膜2’の破れや溶接時の発泡の問題が解消され、損失低減効果に優れ、コイル占積率の高い集合導線となる。
According to the collective conducting
(集合導線の実施の形態2)
図2は本発明の集合導線の実施の形態2を示した模式図である。
(
FIG. 2 is a schematic diagram showing a second embodiment of the collective conducting wire of the present invention.
図示する集合導線10Aは、束ねた姿勢で隣接する素線の一方が絶縁被膜2’を有した平角素線4であり、他方が絶縁被膜を具備しない裸の平角素線5であって、双方の素線4,5が上下で千鳥配置となっているものである。
The illustrated
集合導線10Aにおいても、導線間の絶縁が図られていることから、損失低減効果に優れ、コイル占積率の高い集合導線となる。
Also in the collective conducting
[交流損失を測定した実験とその結果]
本発明者等は、以下で示す実施例と比較例の集合導線をそれぞれ試作し、双方の交流損失を測定して損失低減効果を比較する実験をおこなった。
[Experiment and results of measuring AC loss]
The inventors of the present invention prototyped the collective conductors of the following examples and comparative examples, measured the AC loss of both, and conducted an experiment to compare the loss reduction effect.
<実施例>
銅素材で裸の丸線の径がφ0.9mmの素線に対し、アルミニウムをクラッド加工して絶縁被膜を形成して断面円形の素線とし、複数の素線を束ねてダイスに収容し、平角状の素線からなる集合導線とした。
<Example>
For bare wires with a diameter of φ0.9mm made of copper material, aluminum is clad to form an insulating film to form a round cross-section wire, and a plurality of wires are bundled and accommodated in a die. It was set as the assembly conducting wire which consists of a flat wire.
<比較例1>
裸の平角導線(断面寸法は1.7×3.2mm)からなる複数の素線を束ねてダイスに収容し、平角状の素線からなる集合導線(実施例と同断面積)とした。
<比較例2>
実施例および比較例1と同断面積の平角線とした。
<Comparative Example 1>
A plurality of strands made of bare rectangular conductors (cross-sectional dimension is 1.7 × 3.2 mm) were bundled and accommodated in a die to obtain a collective conductor made of flat strands (the same cross-sectional area as in the example).
<Comparative example 2>
A rectangular wire having the same cross-sectional area as in Example and Comparative Example 1 was used.
<損失測定方法と測定結果>
交流磁気特性試験装置(エプスタイン測定装置 メトロン技研製)を用いて、実施例および平角線の集合導線の交流損失を測定した。
<Loss measurement method and measurement results>
Using an AC magnetic property test device (Epstein measuring device, made by Metron Giken), AC loss of the working wires of the examples and the rectangular wires was measured.
実施例、比較例1、比較例2の各測定結果に基づき、比較例2に対して実施例および比較例1の損失低減率を求めた。 Based on the measurement results of the example, the comparative example 1, and the comparative example 2, the loss reduction rate of the example and the comparative example 1 was obtained for the comparative example 2.
その結果、比較例1の損失低減率は60%であり、実施例の損失低減率は85%であり、実施例の損失低減効果が確認された。 As a result, the loss reduction rate of Comparative Example 1 was 60%, the loss reduction rate of the Example was 85%, and the loss reduction effect of the Example was confirmed.
また、本実験により、実施例の加工性や溶接性が良好であることも確認されている。 Moreover, it was confirmed by this experiment that the workability and weldability of the examples are good.
以上、本発明の実施の形態を図面を用いて詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。 The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.
1…導線(断面円形の導線)、1’…平角導線、2,2’…絶縁被膜、3…素線(丸線)、4…平角素線、5…裸の平角素線、10,10A…集合導線
DESCRIPTION OF
Claims (1)
断面が円形の銅素材の導線であって絶縁被膜を具備しない素線と、をそれぞれ複数用意し、
前記絶縁被膜を具備した素線と前記絶縁被膜を具備しない素線を隣接させ、該絶縁被膜を具備した素線と該絶縁被膜を具備しない素線を左右および上下で千鳥配置して束ね、
束ねられた複数の前記素線をダイスもしくはロールに収容して各素線の平角線化を図って一体化させ、絶縁被膜を具備した平角素線と絶縁被膜を具備しない裸の平角素線が上下および左右で千鳥配置となっている集合導線を製造する、集合導線の製造方法。 A wire comprising an insulating coating, comprising: a copper conductive wire having a circular cross section; and a metal coating that is a non-magnetic insulating coating having a higher electrical resistance than copper disposed around the conducting wire. When,
A plurality of wires each having a circular copper cross section and not having an insulating coating,
Adjacent a wire having the insulating film and a wire not having the insulating film, and bundling the element wire having the insulating film and the wire not having the insulating film in a staggered arrangement on the left and right and top and bottom,
A plurality of bundled strands are accommodated in dies or rolls, and the strands of each strand are converted into a flat wire and integrated, and a flat rectangular wire having an insulating coating and a bare rectangular strand not having an insulating coating are obtained. A method for manufacturing a collective conducting wire , wherein the collective conducting wires are arranged in a staggered arrangement in the vertical and horizontal directions .
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