JPH01152939A - Winding of rotary electric machine - Google Patents
Winding of rotary electric machineInfo
- Publication number
- JPH01152939A JPH01152939A JP30861787A JP30861787A JPH01152939A JP H01152939 A JPH01152939 A JP H01152939A JP 30861787 A JP30861787 A JP 30861787A JP 30861787 A JP30861787 A JP 30861787A JP H01152939 A JPH01152939 A JP H01152939A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- insulation
- strands
- shield layer
- winding
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 title claims abstract description 14
- 239000004020 conductor Substances 0.000 claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 239000000945 filler Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 230000017105 transposition Effects 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明はタービン発電機等の大形高、電圧回転電機にお
ける巻線に係り、特にコイル内部の電位制御を行うシー
ルド層を有する回転電機巻線に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a winding in a large-scale high-voltage rotating electrical machine such as a turbine generator, and particularly relates to a shield layer for controlling the potential inside the coil. The present invention relates to a rotating electric machine winding having the following.
（従来の技術）
発電機等に組み込まれたコイルの絶縁に生じる電気スト
レスは一様ではなく、導体平坦部よりも電界の集中する
導体角部の方が高い（例えば、電気学会全国大会予稿、
Ｎｏ、２９１、昭６０）、、そしてこの角部の最大電界
は導体角部の曲率半径が小さいほど大きくなることから
、該角部の電界集中を緩和させる峠的のため、第２図の
ように電位シールド層として半導電性のテープまたはシ
ートを導体２の外周に巻回形成し、角部の等価曲率半径
を大きくする方法が考案されている（例えば、ＩＥＥＥ
Ｔｒａｎｓ。(Prior art) The electrical stress that occurs in the insulation of a coil built into a generator, etc. is not uniform, and is higher at the corners of a conductor where the electric field is concentrated than at the flat parts of the conductor (for example, the electrical stress generated in the insulation of a coil incorporated in a generator, etc.
No. 291, 1983), and since the maximum electric field at this corner becomes larger as the radius of curvature of the corner of the conductor becomes smaller, it is necessary to reduce the electric field concentration at the corner, as shown in Figure 2. A method has been devised in which a semiconductive tape or sheet is wound around the outer periphery of the conductor 2 as a potential shield layer to increase the equivalent radius of curvature of the corner (for example, IEEE
Trans.
ＰＡＳ、 Ｖｏｌ、 １０２． Ｎｏ、 １ 、 ＰＰ
７４〜８２．１９８４）。PAS, Vol, 102. No. 1, PP
74-82.1984).
（発明が解決しようとする問題点）
前記シールド層１に高電界緩和効果を与えるため該シー
ルド層１を導体２に電気接続し、その電位を一様に制御
する必要がある。しかしながらシールド層１を形成する
ための該半導電性薄葉材料はスロット内に置かれたとき
スロットを横切る磁束によって生じる渦電流損を極めて
小さな値に抑えるためにその電気抵抗が比較的大きなも
のが選択される。このため、タービン発電機コイルのよ
うに長大なものではその全長に亘って該シールド層１の
電位を一様に制御するのが薙しいという問題があった。(Problems to be Solved by the Invention) In order to impart a high electric field relaxation effect to the shield layer 1, it is necessary to electrically connect the shield layer 1 to the conductor 2 and control its potential uniformly. However, the semiconductive thin film material for forming the shield layer 1 is selected to have a relatively high electrical resistance in order to suppress the eddy current loss caused by the magnetic flux that crosses the slot when placed in the slot to an extremely small value. be done. Therefore, in the case of a long coil such as a turbine generator coil, there is a problem in that it is difficult to control the potential of the shield layer 1 uniformly over its entire length.
そこで本発明は上記問題点を解決するために導体を構成
する各素線間の絶縁性を損うことなく、かつ確実にその
電位を制御することが可能な回転電機巻線を提供するこ
とを目的とする。Therefore, in order to solve the above-mentioned problems, the present invention aims to provide a rotating electric machine winding that can reliably control the potential without impairing the insulation between the individual wires constituting the conductor. purpose.
（問題点を解決するための手段）
本発明は上記目的を達成するために素線絶縁が施された
素線が束ねられて形成される回転電機の導体において、
前記回転電機のコイルスロット部に配置される前記導体
の角部に位置する前記素線の素線絶縁を除去して除去部
を形成し、この除去部に接触するように前記導体の外周
に半導電性テープを巻回してシールド層を形成し、この
シールド層の外周に対地絶縁を形成したことを特徴とす
る回転電機巻線を提供する。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a conductor for a rotating electrical machine formed by bundling strands of strands insulated.
The wire insulation of the wire located at the corner of the conductor disposed in the coil slot portion of the rotating electric machine is removed to form a removed portion, and a half is formed on the outer periphery of the conductor so as to be in contact with the removed portion. A rotating electric machine winding is provided, characterized in that a shield layer is formed by winding a conductive tape, and ground insulation is formed on the outer periphery of the shield layer.
（作 用）
本発明による回転電機巻線では導体の角部に位置する素
線とシールド層とはほぼコイルスロット部全長に亘って
電気接続をもつことが可能となり。(Function) In the rotating electric machine winding according to the present invention, it is possible to have an electrical connection between the strands located at the corners of the conductor and the shield layer over almost the entire length of the coil slot portion.
長大なタービン発電機のコイルにおいてもそのシールド
層の電位をほぼ一様に制御することができる。 □
（実 施 例）
本発明による回転電機巻線の一実施例について第１図を
参照して説明する。Even in a long turbine generator coil, the potential of the shield layer can be controlled almost uniformly. □ (Embodiment) An embodiment of the rotating electrical machine winding according to the present invention will be described with reference to FIG.
２は導体でありこの導体２は絶縁被覆された素線３をス
ロット部で転位し、素線列間の絶縁としてバーチカルセ
パレータ４を挿入し、転位部にはフィラー５を充填し、
モールド成形されている。2 is a conductor, and this conductor 2 has insulation-coated strands 3 transposed in a slot portion, a vertical separator 4 is inserted as an insulation between the strand rows, and a filler 5 is filled in the transposed portion.
It is molded.
該導体２のひとつの角部に当たる素線３ａの角部の素線
被覆を除去する。またシールド層１はカーボンブラック
を混入して半導性を付与した熱硬化性レジンを補強用材
として用いるポリエステル不繊維布テープに含浸し、加
熱処理した半導電性テープを導体２の外周に連続巻回し
て形成する。さらにこの外周に重ねて対地絶縁用マイカ
テープを回転電機の定格に応じて巻回した後、熱硬化性
レジンを含浸硬化して対地絶縁６を形成する。The wire coating at the corner of the wire 3a corresponding to one corner of the conductor 2 is removed. The shield layer 1 is made by impregnating a polyester non-fibrous cloth tape used as a reinforcing material with a thermosetting resin mixed with carbon black to give it semiconductivity, and continuously wrapping the heat-treated semiconductive tape around the outer circumference of the conductor 2. Turn to form. Further, a mica tape for ground insulation is wound around the outer periphery according to the rating of the rotating electrical machine, and then a thermosetting resin is impregnated and hardened to form the ground insulation 6.
次に作用について説明する。このように構成されたもの
において、導体２を構成する素線３は転位によって素線
束中におけるその位置が、コイル長手方向に沿って常に
変化するため、該導体２の角部に位置する素線３ａも常
に異なる。しかし角部に位置する素線３ａとシールド層
１とは転位ピッチ毎に直接電気接続をもつことが可能な
のでシールド層１の電位をスロット部全長に沿ってほぼ
一様に制御することができる。また導体２を構成する各
素線間は半導電性のシールド層１のみを介して結合され
ているので該シールド層１を形成する半導電性テープの
電気抵抗を十分高くすることによって、素線間の循環電
流の問題は実用上無視することができる。また導体２の
角部に位置する素線３ａの素線被覆を除去し、該半導電
テープの巻回テンションを高めることによって、該導体
２とシールド層１とを確実に電気接続することができる
。Next, the effect will be explained. In this structure, the position of the strands 3 constituting the conductor 2 in the strand bundle constantly changes along the longitudinal direction of the coil due to dislocation, so that the strands 3 located at the corners of the conductor 2 3a is also always different. However, since it is possible to have a direct electrical connection between the wire 3a located at the corner and the shield layer 1 at each dislocation pitch, the potential of the shield layer 1 can be controlled almost uniformly along the entire length of the slot portion. Furthermore, since the individual wires constituting the conductor 2 are connected only through the semiconductive shield layer 1, by making the electrical resistance of the semiconductive tape forming the shield layer 1 sufficiently high, the wires constituting the conductor 2 can be The problem of circulating current between the two can be practically ignored. Further, by removing the wire coating of the wires 3a located at the corners of the conductor 2 and increasing the winding tension of the semiconducting tape, the conductor 2 and the shield layer 1 can be electrically connected reliably. .
なお、本発明は上記実施例に限定されるものではなく、
例えば半導電性テープの材質を変えたり素線被覆を除去
する導体２の角部の数を増す等、その要旨を変更しない
範囲で変形して実施できるのは勿論である。Note that the present invention is not limited to the above embodiments,
It goes without saying that modifications can be made without changing the gist of the invention, such as changing the material of the semiconductive tape or increasing the number of corners of the conductor 2 from which wire coatings are removed.
以上説明したように、本発明によれば導体の角部に位置
する素線をシールド層との電気的接続部としたので各素
線間の絶縁性を損うことなく全長に亘ってその電位を一
様に制御可能な回転電機巻線を得ることができる。As explained above, according to the present invention, since the wires located at the corners of the conductor are used as the electrical connections with the shield layer, the potential can be maintained over the entire length without impairing the insulation between each wire. It is possible to obtain a rotating electrical machine winding that can be uniformly controlled.
第１図は本発明による回転電機巻線の一実施例を示す断
面図、第２図は従来のコイルスロット部を示す断面図で
ある。
１・・・シールド層 ２・・・導体３・・・素線
３ａ・・・角部被覆を除去した素線
６・・・主絶縁
代理人 弁理士 則 近 志 佑
同 第子丸 健FIG. 1 is a sectional view showing an embodiment of a rotating electric machine winding according to the present invention, and FIG. 2 is a sectional view showing a conventional coil slot portion. 1... Shield layer 2... Conductor 3... Element wire 3a... Element wire with corner coating removed 6... Main insulation agent Patent attorney Noriyoshi Chika Yudo Ken Daishimaru
Claims (1)
機の導体において、前記回転電機のコイルスロット部に
配置される前記導体の角部に位置する前記素線の素線絶
縁を除去して除去部を形成し、この除去部に接触するよ
うに前記導体の外周に半導電性テープを巻回してシール
ド層を形成し、このシールド層の外周に対地絶縁を形成
したことを特徴とする回転電機巻線。In a conductor of a rotating electrical machine formed by bundling strands of strand insulation, removing the strand insulation of the strands located at a corner of the conductor arranged in a coil slot of the rotating electrical machine. a removed portion is formed, a shield layer is formed by winding a semiconductive tape around the outer periphery of the conductor so as to be in contact with the removed portion, and ground insulation is formed around the outer periphery of the shield layer. rotating electrical machine windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62308617A JPH067735B2 (en) | 1987-12-08 | 1987-12-08 | Rotating electric machine winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62308617A JPH067735B2 (en) | 1987-12-08 | 1987-12-08 | Rotating electric machine winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01152939A true JPH01152939A (en) | 1989-06-15 |
| JPH067735B2 JPH067735B2 (en) | 1994-01-26 |
Family
ID=17983203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62308617A Expired - Lifetime JPH067735B2 (en) | 1987-12-08 | 1987-12-08 | Rotating electric machine winding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067735B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5175396A (en) * | 1990-12-14 | 1992-12-29 | Westinghouse Electric Corp. | Low-electric stress insulating wall for high voltage coils having roebeled strands |
-
1987
- 1987-12-08 JP JP62308617A patent/JPH067735B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5175396A (en) * | 1990-12-14 | 1992-12-29 | Westinghouse Electric Corp. | Low-electric stress insulating wall for high voltage coils having roebeled strands |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH067735B2 (en) | 1994-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |