JPS59136050A - Manufacture of insulated conductor - Google Patents

Abstract

PURPOSE:To secure the high rate of resin impregnation by a method wherein an insulation layer is formed on the surface of a conductor, surrounding the conductor and leaving gaps extending to the longitudinal direction of the conductor, and is impregnated and hardened by a thermosetting resin. CONSTITUTION:A plurality of, for instance two, ducts 2 are formed on the surface of a conductor 1 longitudinally. The conductor 1 is wrapped by an insulating tape or an insulating sheet and an insulation layer 4, which has air gaps 3 between the conductor 1 and itself, is composed. When this insulated conductor is depressurized, the air, moisture, solvent and the like, contained in the insulation layer 4 are perfectly removed and the layer 4 is sufficiently impregnated by a pressurized impregnation of a thermosetting resin. Therefore, the insulated conductor which has excellent mechanical, thermal and electrical characteristics can be obtained.

Description

【発明の詳細な説明】 ［発明の技術分野］ 本発明は回転電機等に用いる絶縁導体の製造方法Ｃ１関
する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method C1 for manufacturing an insulated conductor used in rotating electric machines and the like.

［発明の技術的背景とその問題点］ 従来、導体を真空加圧含浸方式′＝！たはレジンリッチ
方式で絶縁する場合、導体の表面は平らな才まで、その
上（−直接絶縁テープまたは絶縁シートで絶縁層を形成
している。最近の１７ｔ　′Ａ機器は大容量、高電圧化
が指向され、これらに使用する導体の絶縁層は従来より
厚くなってきて０Ａる。導体表面に巻回する絶線テープ
の巻回数か数回程度の場合は、絶縁テープの重ね目より
答易に、絶縁層中の空り（、湿気、溶剤等の真空除去及
び樹脂の加圧含浸が行なわれる。しかし高電圧の絶縁導
体になると、絶縁テープが１０数回から２０数回も巻回
きれ、このように巻回数が多くなると、絶縁テープの重
ね目部分だけでは、絶縁層中の空気等を充分Ｃ二真空除
去し、また樹脂を充分に絶縁層中Ｓ二加圧含浸すること
ができない。更ｆ二、大容量機の導体は、両端は開放さ
れた状態で絶縁層を形成するが、長さは長く、導体表面
は平滑なので導体表面と巻回された絶縁テープとがある
程度密着した状態となり、開放された両端からも充分な
真空脱気及び加圧含浸が行なわれない。しかし、空気等
を充分に除去し、樹脂を充分に含浸しなければ、硬化後
の絶縁層中１ニボイドが形成され、絶縁特性が低下し、
信頼性のある絶縁システムが得られない。[Technical background of the invention and its problems] Conventionally, conductors were impregnated with vacuum pressure =! When insulating with a resin-rich method, the surface of the conductor is flat, and an insulating layer is formed directly on top of it with an insulating tape or sheet.Recent 17t'A equipment has large capacity and high voltage The insulating layer of the conductors used in these devices has become thicker than before and has a current of 0A.If the insulation tape is wound around the surface of the conductor only a few times, the answer is Vacuums in the insulating layer (moisture, solvent, etc.) can be easily removed by vacuum, and resin can be impregnated under pressure. However, when it comes to high-voltage insulated conductors, the insulating tape can be wound more than 10 to 20 times. When the number of windings increases like this, it is not possible to sufficiently remove air, etc. from the insulating layer with C2 vacuum, and to sufficiently impregnate the resin into the insulating layer with S2 pressure, using only the overlapped portions of the insulating tape. This is not possible.Also, the conductor of a large-capacity machine forms an insulating layer with both ends open, but the length is long and the conductor surface is smooth, so the conductor surface and the wound insulating tape are in close contact to some extent. In this case, sufficient vacuum degassing and pressurized impregnation cannot be carried out from both open ends.However, if air etc. are not sufficiently removed and resin is not sufficiently impregnated, 1 part of the insulating layer after curing will be removed. Nivoids are formed, the insulation properties deteriorate,
Unreliable insulation system.

［発明の目的］ 本発明は、上記した従来技術の持つ欠点を除去し絶縁層
中の空気、湿気、溶剤等を充分（−真空除去し、絶縁層
中へ樹脂を充分ζ：加圧含浸し、機械。[Objective of the Invention] The present invention eliminates the drawbacks of the above-mentioned prior art, and removes air, moisture, solvent, etc. in the insulating layer sufficiently (by vacuum removal, and sufficiently impregnates the resin into the insulating layer by pressure impregnation. ,machine.

熱、　１ｌｌｉ、気的（二価じんな特性を持つ絶縁導体
を得る製造方法を提供することを目的とする。The object of the present invention is to provide a manufacturing method for obtaining an insulated conductor having thermal, thermal, and divalent properties.

［発明の概要］ 上記の目的を達成するため（二本発明の絶縁導体の製造
方法（−おいては、導体の表面に、導体の長さ方向ζ１
延びる空隙を存しつつ、この導体を包囲する絶縁層を形
成し、この絶縁層５二熱硬化樹脂な含浸硬化するようＣ
二して、この空隙にそう樹脂の浸入により、高い樹脂含
浸度を確保するＯ［発明の実施例］ 以下に本発明の絶縁導体の製造方法の一実施例ｆ二つい
て、第１図を参照して説明する。１は導体で、この導体
１の表面に溝２を長手方向（絶縁テープ、絶縁シートを
巻く方向と交わる方向）ζ二つける。第１図子二おいて
は導体１の片面（１谷２本の溝２を形成したものを示し
たが、溝２は１本なし）し数本が可能である。この導体
１（二絶縁テーフ′または絶縁シートを巻き、導体１と
の間（二空隙３を有する絶縁層４をつくる。この様Ｃ二
専体１と絶縁Ｎ４との間（＝長さ方向に空隙３をつくる
と、減圧した際絶縁層４内部の空気、湿気や溶剤等が光
分（二除去され、そして８Ｒ脂の加圧含浸が光分Ｃ二行
なわれる。[Summary of the Invention] In order to achieve the above object (2), the method for manufacturing an insulated conductor of the present invention (-) provides a method for manufacturing an insulated conductor of the present invention.
An insulating layer surrounding this conductor is formed while leaving an extending void, and this insulating layer 5 is impregnated with a thermosetting resin and cured with C.
Second, a high degree of resin impregnation is ensured by infiltration of the resin into the voids.[Embodiments of the Invention] Below are two embodiments of the method for manufacturing an insulated conductor of the present invention, see FIG. and explain. 1 is a conductor, and grooves 2 are formed on the surface of the conductor 1 in the longitudinal direction (in the direction intersecting the direction in which the insulating tape or sheet is wound). In FIG. 1, one side of the conductor 1 (two grooves 2 per valley is shown, but one groove 2 is not provided), and several grooves are possible. Wrap this conductor 1 (two insulating tapes' or insulating sheets to create an insulating layer 4 having two gaps 3 between it and the conductor 1. In this way, between the C2 exclusive body 1 and the insulating N4 (= in the length direction When the void 3 is created, when the pressure is reduced, the air, moisture, solvent, etc. inside the insulating layer 4 are removed by light (2), and pressure impregnation with 8R fat is carried out by light (2).

この実施例の効果を検証するン’ｃめＣ１厚さ３０．、
。To verify the effect of this example, C1 thickness is 30. ,
.

幅１００ＩＩＪの導体の両面に、深さ０．８１１１１　
、　ｎＸＡ　０．８ｍの溝を２本ずつつけた。この導体
と他の条件は全て同じ（二して溝をつけない導体ｌ１絶
縁テープを２８Ｎ巻回し樹脂を含浸した。溝をつけない
導体の場合、最外層より１４層１で樹脂が含浸したが、
本実施例では２８層全体に樹脂が充分］二含浸していた
。この結果本実施例による導体１ユ溝をつけた場合、溝
をつけない場合に比べ、２倍の厚さの絶縁層が含浸きれ
ることが確認きれた。すなわち、現在より２倍の厚さま
でボイドのない信頼性の高い絶縁システムが得ら」］、
る。A depth of 0.81111 on both sides of a 100IIJ wide conductor.
, nXA Two grooves of 0.8 m each were formed. All other conditions were the same for this conductor (2) Non-grooved conductor l1 insulating tape was wound for 28N and impregnated with resin.In the case of a non-grooved conductor, resin was impregnated in 14 layers from the outermost layer. ,
In this example, the entire 28 layers were sufficiently impregnated with the resin. As a result, it was confirmed that when the conductor according to this example was provided with grooves, an insulating layer twice as thick as that without grooves could be impregnated. In other words, a highly reliable insulation system with no voids can be obtained up to twice the thickness of the current one.''
Ru.

次に、他のそれぞれの異なる実施νＩＪを第２図。Next, FIG. 2 shows other different implementations νIJ.

第３図、第４し１に示す。第２図は第１図の溝とは反対
に、導体１の入面の長さ方向（二、機械加工あるいは導
体と同じ材質のものを溶接又は欽ろう付等により凸部５
を設け、絶縁Ｍ４と導体の間に空隙３が形成されるよう
にしたものである。凸部の高さ寸びミを、絶縁厚さのＸ
ｏ−Ｘ−すれば、高電圧機器では絶縁層が厚いため、絶
縁表面に問題となるような凸凹は生じない。Shown in FIGS. 3 and 4 and 1. Figure 2 shows that, contrary to the grooves in Figure 1, the protrusions are formed in the longitudinal direction of the entrance surface of the conductor 1 (2) by machining or by welding or brazing the same material as the conductor.
A gap 3 is formed between the insulation M4 and the conductor. The height of the convex portion is the insulation thickness
If o-X- is used, the insulating layer is thick in high-voltage equipment, so no unevenness that would cause problems will occur on the insulating surface.

第３図Ｕ、導体１の表面の長さ方向に２φのププラスひ
も６を巻込み、絶縁層４と導体１の間に空隙３が出来る
ようにしたものである。真空カー１気及び樹月ａ加圧含
浸工程は、ガラスコードの太さによる空隙のため充分に
１行なわれ、この後ガラスコードば、絶縁層を圧縮加熱
硬化する時押しつぶされ、絶縁層の表面にはほとんど影
響を及ぼさない。In FIG. 3U, a 2φ plastic string 6 is wound in the longitudinal direction of the surface of the conductor 1, so that a gap 3 is created between the insulating layer 4 and the conductor 1. The vacuum car and pressure impregnation process is carried out once enough due to the voids caused by the thickness of the glass cord.After this, the glass cord is crushed when the insulating layer is compressed and heated to harden, and the surface of the insulating layer is has almost no effect.

第４図は導体ｌの周囲に、周囲長より煙いシート７を西
て、絶縁層４と導体１の間に空隙３が出来るようｆ二し
たものである。このシート（二絶縁勤と向踵のマイカシ
ートを用いること１″−より、［１］広くはさみ込んで
も、導体と絶縁層の接着力の低下が防げる。空隙を作る
ことによる効果は、第１図と同様である。In FIG. 4, a smoky sheet 7 is placed around the conductor l to the west of the circumferential length so that a gap 3 is formed between the insulating layer 4 and the conductor 1. By using this sheet (two insulating sheets and a mica sheet on the opposite heel), [1] even if they are sandwiched widely, the adhesive force between the conductor and the insulating layer can be prevented from decreasing.The effect of creating a gap is the first It is similar to the figure.

［発明の効果］ 以上説明したようｆ二、本発明の絶縁導体の製造方法に
おいては、導体と絶縁層との間］二、長さ方向１−空隙
をつくることによｉ）、峙に従来より厚い絶縁層ｌ二対
しても、空気、姓剤等の充分カ真空除云、そして樹脂の
充分な加圧含浸が行なわれるので、機械、熱、電気的＋
二９３−１ｚた特性を持つ絶縁導体を得ることができる
。[Effects of the Invention] As explained above, f2. In the method for manufacturing an insulated conductor of the present invention, by creating a gap between the conductor and the insulating layer; Even for thicker insulating layers, air, chemicals, etc. are removed by vacuum, and resin is impregnated with sufficient pressure, so mechanical, thermal, electrical, etc.
An insulated conductor with characteristics as high as 293-1z can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

Claims (1)

【特許請求の範囲】 １　導体の表面Ｃおいてこの導体の長さ方向ｌ−延びる
空隙を存しつつ前記導体を包囲する絶縁層を形成し、こ
の絶縁層に熱硬化性樹脂を含浸硬化することを特徴とす
る絶縁導体の製造方法。 ２、空隙は、導体表面に凹設された条溝ｆ二よってもた
らされることを特徴とする特許請求の範囲第１項記載の
絶縁導体の製造方法。 ３、空隙は、導体表面を二設けられた凸出部によっても
たらされることを特徴とする特許請求の範１２１１第１
項記載の絶縁導体の製造方法。 ４、空隙は、導体表面（二沿設されたひも状又は棒状の
絶縁体によってもたらされることを特徴とするｆｉ：肝
請求の範囲第１項記載の絶縁導体の製造方法。 ５、　空隙は、導体表面に当設されたシート状の絶縁体
によってもたらされることを特徴とする特許請求の範囲
第１項記載の絶縁導体の製造方法０[Claims] 1. Forming an insulating layer surrounding the conductor while leaving a gap extending in the length direction l of the conductor on the surface C of the conductor, and impregnating and curing the insulating layer with a thermosetting resin. A method for manufacturing an insulated conductor, characterized by: 2. The method for manufacturing an insulated conductor according to claim 1, wherein the voids are provided by grooves f2 recessed in the surface of the conductor. 3. Claim 1211 No. 1, characterized in that the void is provided by two protrusions provided on the conductor surface.
A method for producing an insulated conductor as described in . 4. The method for producing an insulated conductor according to claim 1, characterized in that the void is provided by a string-like or rod-like insulator extending along the conductor surface. 5. The void is A method for manufacturing an insulated conductor according to claim 1, characterized in that the method is produced by a sheet-like insulator placed on the surface of the conductor.