JPH0652641B2 - Insulated winding manufacturing method - Google Patents
Insulated winding manufacturing methodInfo
- Publication number
- JPH0652641B2 JPH0652641B2 JP59117097A JP11709784A JPH0652641B2 JP H0652641 B2 JPH0652641 B2 JP H0652641B2 JP 59117097 A JP59117097 A JP 59117097A JP 11709784 A JP11709784 A JP 11709784A JP H0652641 B2 JPH0652641 B2 JP H0652641B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- wire
- oxide film
- conductor
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、大容量変圧器等に用いるのに好適な絶縁巻
線の製造方法に関する。TECHNICAL FIELD The present invention relates to a method for manufacturing an insulating winding suitable for use in a large-capacity transformer or the like.
従来から変圧器等に用いられているエナメル等の絶縁巻
線の構造は、第３図および第４図に示す断面形状をした
ものである。The structure of an insulated winding such as an enamel conventionally used in a transformer or the like has a cross-sectional shape shown in FIGS. 3 and 4.
この絶縁巻線１は、導体に絶縁被膜を施した素線２を複
数本撚り合わせたものの外周に絶縁テープ等を巻回した
絶縁層３が設けられた構造となっており、これを実際に
鉄心に巻回する場合、隣接する絶縁巻線１，１の間に出
来る無駄な空間をできるだけ少なくするために絶縁巻線
の形状を四角形に圧縮整形されたものが用いられてる。
また、素線２を構成する導体４の外周に形成された絶縁
皮膜５として、一般にはホルマールエナメルが用いられ
ており、その皮膜の厚さは50μｍ程度のものである。This insulating winding 1 has a structure in which a plurality of strands 2 each having an insulating coating on a conductor are twisted together, and an insulating layer 3 around which an insulating tape or the like is wound is provided on the outer circumference. When wound around an iron core, the shape of the insulating winding is compressed and shaped into a quadrangle in order to reduce the useless space formed between the adjacent insulating windings 1 and 1 as much as possible.
Further, formal enamel is generally used as the insulating coating 5 formed on the outer periphery of the conductor 4 constituting the strand 2, and the thickness of the coating is about 50 μm.
現在、一般に用いられる絶縁巻線１が、複数本の絶縁素
線２，２……によって構成されたものである理由は、導
体中に発生する渦電流損を低減させるためである。すな
わち、絶縁巻線１を変圧器等の鉄心に巻回した場合、鉄
心から発生する交番漏れ磁束によって導体４内には渦電
流が発生する。このため、導体４内の電流密度が一様で
なくなり、交流抵抗が増加して、電流の損失が大きくな
る。この損失は、導体４の等価直径の４乗に比例するの
で、できるだけ導体の径が細くて、かつ絶縁された導体
４を多数撚り合わせたものを用いることにより、変圧器
等に於いて全体としての電流損失を低減させることがで
きるからである。The reason why the commonly used insulated winding 1 is composed of a plurality of insulated wires 2, 2 ... At present is to reduce the eddy current loss generated in the conductor. That is, when the insulating winding 1 is wound around an iron core such as a transformer, an eddy current is generated in the conductor 4 due to the alternating leakage magnetic flux generated from the iron core. Therefore, the current density in the conductor 4 is not uniform, the AC resistance increases, and the current loss increases. Since this loss is proportional to the fourth power of the equivalent diameter of the conductor 4, the diameter of the conductor is as thin as possible, and by using a large number of insulated conductors 4 twisted together, it is possible to reduce the overall loss in a transformer or the like. This is because the current loss of can be reduced.
ところで、従来から一般に用いられている導体４の寸法
としては(1.0〜2.5mm)×(5〜10mm)程度の角形のものが
用いられているが、前述したように、渦電流損を低減す
るためには、磁界方向と直交する導体厚さ（第４図に示
す符号ａ）が1.0〜2.5mmでは大きすぎるので、さらにサ
イズの細いもの、例えば0.5〜1mmφのものを用いた方が
効果がある。しかし、このような細い導体４，４……の
１本１本にエナメル皮膜を施したもので、絶縁巻線１を
構成すると、占積率が悪く、絶縁巻線の径が大きくなっ
てしまい、変圧器本体および製造装置が大型化するとい
う問題があった。また、エナメル素線を用いて圧縮成形
巻線とする場合、圧縮するときエナメル皮膜が剥れる恐
れがあったり、エナメルを多量に使用するために製造コ
ストが高くなったりするという問題もあるので、近年、
銅又は銅合金からなる帯状導体表面にエネメル皮膜より
薄い銅酸化物を絶縁皮膜として設けたものを用いたもの
が現われた。By the way, as the size of the conductor 4 which has been generally used from the past, a rectangular one having a size of (1.0 to 2.5 mm) × (5 to 10 mm) is used, but as described above, the eddy current loss is reduced. In order to achieve this, since the conductor thickness (symbol a shown in FIG. 4) orthogonal to the magnetic field direction is too large at 1.0 to 2.5 mm, it is more effective to use a thinner one, for example, 0.5 to 1 mmφ. is there. However, if the insulated winding 1 is constructed by applying an enamel coating to each of these thin conductors 4, 4, ..., The space factor is poor and the diameter of the insulated winding becomes large. However, there is a problem that the transformer main body and the manufacturing apparatus are increased in size. Further, when using a enamel element wire for compression molding, there is a problem that the enamel film may peel off when compressed, or there is a problem that the manufacturing cost increases because a large amount of enamel is used. recent years,
It has appeared that a strip-shaped conductor made of copper or a copper alloy having a copper oxide thinner than an enemel coating as an insulating coating is used.
この発明は、上記事情に鑑み、製造コストを上げずに、
しかも占積率を変えずに渦電流損を低減させることがで
きる酸化銅皮膜絶縁巻線の製造方法を提供することを目
的とする。In view of the above circumstances, the present invention does not increase the manufacturing cost,
Moreover, it is an object of the present invention to provide a method for manufacturing a copper oxide film insulated winding capable of reducing eddy current loss without changing the space factor.
この発明は、酸化銅皮膜、詳しくは酸化第二銅(CuO)の
皮膜が、極めて薄く、かつ絶縁性に優れていることに着
眼してなされたもので、上記目的を達成するために、銅
又は銅合金の細素線を複数本撚り合わせて一本の素線を
構成した後、該素線に酸化処理を施して、各細素線の表
面に均一な酸化銅皮膜を形成し、その後で、これを複数
本撚り合わせて所望の断面形状に圧縮整形して巻線導体
を構成し、該巻線導体の外周に絶縁層を設けることによ
り絶縁電線を製造することを特徴とするものである。The present invention is a copper oxide film, specifically, a film of cupric oxide (CuO), which is made to be extremely thin and has excellent insulating properties. Alternatively, after forming a single strand by twisting a plurality of fine strands of copper alloy, the strands are oxidized to form a uniform copper oxide film on the surface of each fine strand, and then Then, a plurality of these are twisted together and compression-molded into a desired cross-sectional shape to form a winding conductor, and an insulating layer is provided on the outer periphery of the winding conductor to produce an insulated electric wire. is there.
ところで、酸化第二銅の皮膜を絶縁層として用いた変圧
器等に適した絶縁巻線として、出願人は先に特開昭59−
96605号公報に記載したような発明を提案している。こ
の発明は、銅素線を同心撚りしたものを圧縮整形した後
で、酸化皮膜処理を施して、絶縁酸化第二銅皮膜を銅線
表面に形成することにより第５図及び第６図に見る如き
絶縁電線を得るものであり、それは、次のような工程を
経て製造されている。By the way, as an insulated winding suitable for a transformer or the like using a cupric oxide film as an insulating layer, the applicant has previously described in JP-A-59-
The invention as described in Japanese Patent No. 96605 is proposed. According to the present invention, after concentrically twisting a copper element wire is compressed and shaped, an oxide film treatment is performed to form an insulating cupric oxide film on the copper wire surface, as shown in FIGS. 5 and 6. Such an insulated wire is obtained, which is manufactured through the following steps.
0.5〜1mmφの銅の細素線12aを７〜61本同心撚りして
素線10aを構成する。7 to 61 pieces of 0.5 to 1 mmφ fine copper wire 12a are concentrically twisted to form the wire 10a.
素線10aを19〜91本同心撚りして集合線15とし、これ
を所望の断面形状、例えば四角形に圧縮整形して巻線導
体13aを構成する。19 to 91 strands 10a of the strands 10a are concentrically twisted to form a bundled wire 15, and this is compressed and shaped into a desired cross-sectional shape, for example, a quadrangle, to form a winding conductor 13a.
巻線導体13aに酸化処理を施し、各細素線12aの表面に
酸化第二銅の皮膜16を形成する。The winding conductor 13a is oxidized to form a cupric oxide film 16 on the surface of each thin wire 12a.
巻線導体13aの外周に絶縁紙、プラスチックス、等よ
りなる絶縁層20を設ける。An insulating layer 20 made of insulating paper, plastics or the like is provided on the outer periphery of the winding conductor 13a.
ここで、上記の第３工程の酸化処理を行なうには、巻線
導体13を洗浄した後、亜塩素酸ナトリウムとカセイソー
ダの各５％水溶液（90〜100℃）などの酸化処理液の中
に浸漬し、各細素線12の表面に酸化第二銅(CuO)の皮膜
を形成する。この場合、浸漬時間によって前記酸化第二
銅の皮膜の厚みを制御することができるが、通常、0.3
〜３μｍ程度の厚みになされている。酸化第二銅の体積
抵抗率は105Ω−cmであるから、この程度の厚みで十分
絶縁効力を有する。Here, in order to perform the oxidation treatment of the above-mentioned third step, after washing the winding conductor 13, it is immersed in an oxidation treatment liquid such as a 5% aqueous solution of sodium chlorite and caustic soda (90 to 100 ° C.). By immersing, a film of cupric oxide (CuO) is formed on the surface of each thin wire 12. In this case, the thickness of the cupric oxide film can be controlled by the immersion time, but usually 0.3
The thickness is about 3 μm. Since the cupric oxide has a volume resistivity of 10 5 Ω-cm, a thickness of this level has a sufficient insulating effect.
ところで、このように同心撚り、圧縮整形した後で酸化
処理を行なおうとすると、圧縮整形した巻線導体13は、
細素線12間の隙間が非常にせまくなっていて、内部まで
酸化処理液が浸透しにくい。そこで、特開昭57−57414
号公報に示されているように、巻線導体13を100℃以上
に予熱してから酸化処理液に浸せきするとか、あるいは
特開昭56−73809号公報に示されているように、酸化処
理液中の巻線導体13に超音波を照射する等の方法を併用
することが行なわれている。By the way, when an oxidization process is performed after concentric twisting and compression shaping as described above, the compression-shaped winding conductor 13 is
The gap between the fine wires 12 is very small, and the oxidation treatment liquid does not easily penetrate into the inside. Therefore, JP-A-57-57414
As disclosed in Japanese Patent Publication No. 56-73809, the winding conductor 13 is preheated to 100 ° C. or higher and then immersed in an oxidizing treatment liquid, or as disclosed in Japanese Patent Laid-Open No. 56-73809. A method of irradiating ultrasonic waves to the winding conductor 13 in the liquid is also used together.
何故に、このような複雑で面倒な酸化皮膜処理の工程を
採用しなければならなかったかというと、細素線に酸化
皮膜処理を施したものを複数本まとめて素線としたもの
を同心撚りした後、所望形状に圧縮整形して絶縁巻線に
すると、折角細素線表面に形成された酸化銅皮膜が剥離
するのではないかと恐れたからである。The reason why such a complicated and troublesome process of oxide film treatment had to be adopted was that multiple strands of oxide wires treated with oxide film were bundled into concentric strands. This is because, after that, if it is compressed and shaped into a desired shape to form an insulating winding, the copper oxide film formed on the surface of the bent rectangular filament may be peeled off.
確かに上記発明の製造方法によれば、一括して酸化第二
銅の絶縁皮膜を形成することができるという利点がある
が、その反面、前述したような特殊な酸化処理の工程を
併用して用いなければならないし、また、各素線の表面
に均一な酸化皮膜が形成されにくいという欠点があるの
で、浸漬する時間を短くすることがむづかしいので、全
体としての製造時間の短縮が困難である。Certainly, according to the manufacturing method of the above-mentioned invention, there is an advantage that the insulating film of cupric oxide can be formed at one time, but on the other hand, the special oxidation treatment step as described above is used in combination. Since it has to be used and has the drawback that a uniform oxide film is difficult to form on the surface of each strand, it is difficult to shorten the dipping time, so it is difficult to shorten the manufacturing time as a whole. .
そこで、出願人は色々と実験を繰返し行なって、検討し
た結果、銅細素線を同心撚りした素線に酸化第二銅皮膜
を形成した後で、同心撚りしたものを圧縮整形して絶縁
巻線としても、酸化第二銅皮膜が致命的な剥離を生ずる
こともなく、圧縮整形後に酸化処理を施したものに劣ら
ない性能を有する絶縁巻線が得られることを知った。Therefore, the applicant repeatedly conducted various experiments and as a result, as a result of examination, formed a cupric oxide film on a wire in which thin copper wires were concentrically twisted, and then compressed and shaped the concentric twisted wire to form an insulating winding. As a wire, it has been found that the cupric oxide film does not cause fatal peeling, and an insulated winding having a performance not inferior to that subjected to an oxidation treatment after compression shaping can be obtained.
そこで、第１図及び第２図を参照して本願の発明の一実
施例について説明する。Therefore, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
本願の発明は、次のような工程により絶縁巻線を製造す
るようにしたものである。According to the invention of the present application, the insulated winding is manufactured by the following steps.
0.5〜1mmφの銅の細素線12を７〜61本同心撚りして素
線10を構成する。7 to 61 pieces of 0.5 to 1 mmφ fine copper wire 12 are concentrically twisted to form the wire 10.
上記素線10に酸化処理を施して、各細素線12の表面に
厚さが1.5μｍの酸化第二銅の皮膜を均一に形成して隙
間なく一体化する。The filaments 10 are subjected to an oxidation treatment to uniformly form a cupric oxide film having a thickness of 1.5 μm on the surface of each filament 12 so as to be integrated without any gap.
上記酸化第二銅の皮膜を形成した素線10を19〜91本同
心撚りにする。19 to 91 concentric strands of the elemental wire 10 on which the cupric oxide film is formed are formed.
上記同心撚りした素線を所望の断面形状、例えば四角
形に圧縮整形して巻線導体13を構成する。The concentric strand is compressed and shaped into a desired cross-sectional shape, for example, a quadrangle to form the winding conductor 13.
上記巻線導体13の外周に絶縁紙、プラスチックス、等
よりなる絶縁層14を設けて絶縁巻線とする。An insulating layer 14 made of insulating paper, plastics or the like is provided on the outer circumference of the winding conductor 13 to form an insulating winding.
このような製造方法によれば、第一工程を終了した段階
では、素線の径も小さくて、素線を構成する各細素線12
間にも酸化雰囲気として可能な程度の間隙があるので、
第二工程で酸化処理を施す場合にも、各細素線12の表面
に一様に均一な厚さの酸化第二銅の皮膜を容易に形成す
ることができる。このようにしてできた酸化皮膜素線は
隙間がなくあたかも一本の銅線のようになっている。According to such a manufacturing method, at the stage where the first step is completed, the diameter of the wire is small, and each thin wire 12 constituting the wire is
Since there is a gap between them that allows for an oxidizing atmosphere,
Even when the oxidation treatment is performed in the second step, a cupric oxide film having a uniform thickness can be easily formed on the surface of each thin wire 12. The oxide film wire thus formed has no gap and looks like a single copper wire.
そして、1.5μｍ程度の酸化第二銅の皮膜を有する素線
であれば、径も細くて可撓性があるので同心撚りやその
後の圧縮整形を行なっても、摩擦力等により酸化皮膜が
剥離することもない。If the wire has a cupric oxide film of about 1.5 μm, it has a small diameter and is flexible, so even if concentric twisting and subsequent compression shaping are performed, the oxide film will peel off due to frictional force. There is nothing to do.
本願の発明により製造した絶縁巻線11において、細素線
12の径を1.0mm、細素線12の本数を７本、素線10の本数
を37本とし、直流抵抗と、50Hzにおける交流抵抗との比
を測定すると、1.07であった。従来品の前記測定値が1.
21であるから、渦電流損は著しく改善されていることに
なる。In the insulated winding 11 manufactured according to the invention of the present application, a thin wire
The diameter of 12 was 1.0 mm, the number of thin wires 12 was 7, the number of wires 10 was 37, and the ratio of the direct current resistance to the alternating current resistance at 50 Hz was measured to be 1.07. The measured value of the conventional product is 1.
Since it is 21, the eddy current loss is remarkably improved.
以上説明したようにこの発明によれば、銅又は銅合金の
細素線を複数本撚り合わせて一本の素線を構成した後、
該素線に酸化処理を施して、各細素線の表面に均一な酸
化銅皮膜を形成し、その後で、これを複数本撚り合わせ
所望の断面形状に圧縮整形して巻線導体を構成し、該巻
線導体の外周に絶縁層を設けるようにしたので、製造コ
ストを上げずに、しかも従来の絶縁巻線と占積率を変え
ずに渦電流損を著しく低減させることができる。As described above, according to the present invention, after forming a single strand by twisting a plurality of copper or copper alloy fine strands,
The strands are subjected to an oxidation treatment to form a uniform copper oxide film on the surface of each fine strand, and then a plurality of strands are twisted together and compression-molded into a desired cross-sectional shape to form a winding conductor. Since the insulating layer is provided on the outer circumference of the winding conductor, the eddy current loss can be significantly reduced without increasing the manufacturing cost and without changing the space factor of the conventional insulating winding.
第１図は、この発明の一実施例に係る素線の構成を示す
断面図、第２図は、同実施例による絶縁巻線の構成を示
す断面図、第３図および第４図は各々従来のエナメル等
の絶縁巻線の構成を示す断面図、第５図および第６図は
従来の酸化銅皮膜絶縁電線の構成を示す断面図である。 １，11，21…絶縁巻線、３，14，20…絶縁層、４，10，
10a…素線、12，12a…細素線、13，13a…巻線導体、16
…酸化銅皮膜。FIG. 1 is a sectional view showing the structure of an element wire according to an embodiment of the present invention, FIG. 2 is a sectional view showing the structure of an insulated winding according to the embodiment, and FIGS. 3 and 4 are respectively FIG. 5 and FIG. 6 are cross-sectional views showing the structure of a conventional insulated winding such as an enamel, etc. FIG. 1, 11, 21 ... Insulated winding, 3, 14, 20 ... Insulation layer, 4, 10,
10a ... strands, 12, 12a ... fine strands, 13, 13a ... winding conductors, 16
… Copper oxide film.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 丸山 孝 東京都江東区木場１丁目５番１号 藤倉電 線株式会社内 (72)発明者 上田 克彦 東京都江東区木場１丁目５番１号 藤倉電 線株式会社内 (56)参考文献 特開 昭59−96605（ＪＰ，Ａ) 特開 昭56−73809（ＪＰ，Ａ) 実開 昭55−106670（ＪＰ，Ｕ) 特公 昭59−19611（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Maruyama 1-5-1 Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd. (72) Inventor Katsuhiko Ueda 1-1-5 Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd. (56) Reference JP-A-59-96605 (JP, A) JP-A-56-73809 (JP, A) Actually developed 55-106670 (JP, U) JP-B-59-19611 ( JP, B2)
Claims (1)
て素線を構成し、 該素線に酸化処理を施して、前記各細素線の表面に酸化
第二銅皮膜を形成して隙間のない素線とし、この素線を
複数本撚り合わせ所望の断面形状に圧縮整形して巻線導
体を構成し、 該巻線導体の外周に絶縁層を設けて絶縁巻線とすること
を特徴とする絶縁巻線の製造方法。1. A plurality of fine wires of copper or copper alloy are twisted together to form a wire, and the wires are oxidized to form a cupric oxide film on the surface of each wire. To form a winding conductor with no gap, and compressing and shaping a plurality of the strands into a desired cross-sectional shape to form a winding conductor, and providing an insulating layer on the outer periphery of the winding conductor to form an insulated winding. A method of manufacturing an insulated winding, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59117097A JPH0652641B2 (en) | 1984-06-07 | 1984-06-07 | Insulated winding manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59117097A JPH0652641B2 (en) | 1984-06-07 | 1984-06-07 | Insulated winding manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60262305A JPS60262305A (en) | 1985-12-25 |
| JPH0652641B2 true JPH0652641B2 (en) | 1994-07-06 |
Family
ID=14703320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59117097A Expired - Lifetime JPH0652641B2 (en) | 1984-06-07 | 1984-06-07 | Insulated winding manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652641B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5814291B2 (en) * | 2013-04-11 | 2015-11-17 | トヨタ自動車株式会社 | Manufacturing method of assembly of strands |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996605A (en) * | 1982-11-24 | 1984-06-04 | 株式会社フジクラ | Insulated wire |
-
1984
- 1984-06-07 JP JP59117097A patent/JPH0652641B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60262305A (en) | 1985-12-25 |
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