JPH04236143A - Stator coil for electric rotating machine - Google Patents
Stator coil for electric rotating machineInfo
- Publication number
- JPH04236143A JPH04236143A JP176891A JP176891A JPH04236143A JP H04236143 A JPH04236143 A JP H04236143A JP 176891 A JP176891 A JP 176891A JP 176891 A JP176891 A JP 176891A JP H04236143 A JPH04236143 A JP H04236143A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- slot
- prevention layer
- layer
- stator coil
- 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.)
- Pending
Links
- 239000010410 layer Substances 0.000 claims abstract description 67
- 230000002265 prevention Effects 0.000 claims abstract description 51
- 239000011247 coating layer Substances 0.000 claims abstract description 15
- 238000005470 impregnation Methods 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 12
- 229920001296 polysiloxane Polymers 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 239000003973 paint Substances 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 2
- 150000003377 silicon compounds Chemical class 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、高圧回転電機の単体
含浸方式の固定子コイル、ことに半導電性塗膜層からな
る外部コロナ防止層を有する固定子コイルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-impregnated stator coil for high-voltage rotating electric machines, and more particularly to a stator coil having an external corona prevention layer consisting of a semiconductive coating layer.
【０００２】0002
【従来の技術】図３は従来の高圧回転電機の固定子コイ
ルを示す外形図、図４は固定子コイルを固定子鉄心のコ
イルスロットに収納した状態を示す要部の断面図である
。図において、固定子コイル１は、素線固め処理した整
列コイル導体２と、これを覆う主絶縁層３と、主絶縁層
３の表面のコイルスロットに収納される部分に形成され
た半導電性の外部コロナ防止層４とで構成される。この
ように構成された固定子コイル１は外部コロナ防止層４
の外側を半導電性のスロットライナー７（例えばカーボ
ン紙や，カーボン塗料を塗布した繊維布）で包み、固定
子鉄心５に形成したコイルスロット６にコイル間スペー
サ９を介して２条挿入し、スロットの開口部にくさび８
を打ち込むことにより固定子鉄心に固定される。ところ
で、固定子コイル１のコイル導体２は高圧回転機の運転
中、接地された固定子鉄心５に対して数ＫＶから十数Ｋ
Ｖにおよぶ電位差を持つので、両者間に空隙が存在する
と空隙内で放電（部分放電またはコロナ放電と呼ぶ）が
発生し、主絶縁層３や外部コロナ防止層４に損傷を与え
、さらにはコイル導体２や鉄心５を腐食させるなどの悪
影響を及ぼす。そこで、主絶縁層３はその製造方法とし
て、耐コロナ性に優れたマイカを主体とする絶縁テープ
をコイル導体２の外周に所定の厚みで巻装してよく乾燥
した後、エポキシ樹脂等の熱硬化性樹脂を気泡を残さな
いよう真空加圧含浸し、さらに金型に収納して形状，寸
法を整えた状態で、含浸した樹脂を加熱硬化する単体含
浸方法とすることにより、ボイド等のコロナ発生源を含
まず，かつ耐コロナ性に優れた主絶縁層３を有する整形
コイルが得られる。なお、金型に収納した後、樹脂を真
空加圧含浸，加熱硬化する後含浸方式も行われている。2. Description of the Related Art FIG. 3 is an external view showing a stator coil of a conventional high-voltage rotating electrical machine, and FIG. 4 is a sectional view of the main parts showing the stator coil housed in a coil slot of a stator core. In the figure, a stator coil 1 consists of an aligned coil conductor 2 that has been subjected to wire hardening treatment, a main insulating layer 3 that covers this, and a semiconducting conductor formed in a portion of the surface of the main insulating layer 3 that is accommodated in a coil slot. and an external corona prevention layer 4. The stator coil 1 configured in this way has an outer corona prevention layer 4.
The outside of the liner is wrapped with a semi-conductive slot liner 7 (for example, carbon paper or fiber cloth coated with carbon paint), and two lines are inserted into the coil slots 6 formed in the stator core 5 via inter-coil spacers 9. Wedge 8 in the slot opening
It is fixed to the stator core by driving it in. By the way, the coil conductor 2 of the stator coil 1 has a voltage of several KV to more than ten KV with respect to the grounded stator core 5 during operation of the high-voltage rotating machine.
Since they have a potential difference of up to V, if there is a gap between them, a discharge (called partial discharge or corona discharge) will occur within the gap, damaging the main insulating layer 3 and the outer corona prevention layer 4, and even damaging the coil. This has an adverse effect such as corroding the conductor 2 and the iron core 5. Therefore, the main insulating layer 3 is manufactured by wrapping an insulating tape mainly made of mica, which has excellent corona resistance, around the outer periphery of the coil conductor 2 to a predetermined thickness, and then drying it well. By using a single impregnation method in which the curable resin is impregnated under vacuum pressure without leaving any air bubbles, and the impregnated resin is heated and cured after being stored in a mold and the shape and dimensions are adjusted, corona such as voids can be eliminated. A shaped coil is obtained which does not contain a generation source and has a main insulating layer 3 with excellent corona resistance. Note that a post-impregnation method is also used in which the resin is impregnated with vacuum pressure and cured by heating after being housed in a mold.
【０００３】また、スロットライナー部分に存在する空
隙もコロナ放電（外部コロナとも呼ぶ）の発生源になる
ので、主絶縁層３の表面に半導電性の塗料を塗布して厚
みが０．１ｍｍ程度の外部コロナ防止層４を形成し、そ
の外側を半導電性のスロットライナー７で覆ってスロッ
ト６に収納し、外部コロナ防止層４の電位を固定子鉄心
５の電位に近づけるよう構成され、外部コロナ防止層５
の表面抵抗率を５〜１０ＫΩ程度の範囲とすることによ
り外部コロナの発生を阻止するとともに、外部コロナ防
止層に循環電流が流れることによる発熱および電位上昇
を阻止するよう構成される。Furthermore, since the voids existing in the slot liner portion also become a source of corona discharge (also called external corona), semiconductive paint is applied to the surface of the main insulating layer 3 to a thickness of about 0.1 mm. An external corona prevention layer 4 is formed, the outside of which is covered with a semiconductive slot liner 7 and housed in the slot 6, and the potential of the external corona prevention layer 4 is brought close to the potential of the stator core 5. Corona prevention layer 5
By setting the surface resistivity in the range of about 5 to 10 KΩ, the structure is configured to prevent the generation of external corona and to prevent heat generation and potential increase due to circulating current flowing through the external corona prevention layer.
【０００４】0004
【発明が解決しようとする課題】固定子コイルの外部コ
ロナ防止層４とスロット６の内壁面との間に隙間がある
と、この隙間に電位差が生じ外部コロナが発生する。ま
た、回転電機の起動時や運転中にはコイルに電磁力によ
る振動や熱伸縮力が作用し、これに伴って外部コロナ防
止層と固定子鉄心との間に摩擦力が発生する。したがっ
て、外部コロナ防止層の磨耗を防ぐために、固定子コイ
ルをスロット内に固く固定する必要があり、従来スロッ
トライナーの重ね枚数を部分的に変えて隙間を埋め、か
つコイルをスロット内に固く固定する対策が採られてき
た。しかしながら、スロットライナーの弾力性が乏しい
ために、コイル入れ作業に支障を生じない範囲で隙間を
埋めることには限界があり、局部的に隙間が残るととも
に、回転電機の運転温度にスロットライナーが長期間曝
されることにより徐々に熱劣化し、枯れ収縮して隙間が
増大するので、スロット内におけるコイルの固定が緩み
、外部コロナ防止層およびスロットライナーの磨耗劣化
が進行し、これに伴って外部コロナが発生して損傷を促
進するという悪循環が発生する。また、スロットライナ
ーによる隙間の調整作業は手仕事で多くの人手と作業時
間を要するために、回転電機のコストアップを招くとい
う問題もある。If there is a gap between the outer corona prevention layer 4 of the stator coil and the inner wall surface of the slot 6, a potential difference will occur in this gap and an external corona will occur. Further, when starting up or operating a rotating electrical machine, vibrations and thermal expansion/contraction forces act on the coil due to electromagnetic force, and as a result, frictional force is generated between the external corona prevention layer and the stator core. Therefore, in order to prevent wear of the external corona prevention layer, it is necessary to firmly fix the stator coil in the slot. Conventionally, the number of stacked slot liners is partially changed to fill the gap, and the coil is firmly fixed in the slot. Measures have been taken to. However, due to the slot liner's poor elasticity, there is a limit to how well the gap can be filled without interfering with the coil insertion work, and some gaps remain locally, and the slot liner is too long to withstand the operating temperature of the rotating electric machine. As the coil is exposed to heat for a period of time, it gradually deteriorates due to heat deterioration, shrinks, and increases the gap, which loosens the fixation of the coil in the slot, and the wear and tear of the external corona prevention layer and slot liner progresses. A vicious cycle occurs in which corona occurs and accelerates damage. Further, since adjusting the gap using the slot liner is manual work and requires a lot of labor and time, there is also the problem of increasing the cost of the rotating electric machine.
【０００５】この発明の目的は、コイル入れ作業におけ
るスロット内の隙間調整が容易で、かつ回転電機の長期
運転中における枯れ収縮を生じない外部コロナ防止層を
有する単体含浸方式の固定子コイルを得ることにある。[0005] An object of the present invention is to obtain a single impregnated stator coil having an external corona prevention layer that allows easy adjustment of gaps in slots during coil insertion work and prevents shrinkage during long-term operation of a rotating electric machine. There is a particular thing.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、この発明によれば、成形コイル導体と、その外側に
巻装したマイカテープ層に熱硬化性樹脂を真空加圧含浸
，加熱硬化してなる主絶縁層と、回転電機固定子鉄心の
コイルスロットに挿入される部分の前記主絶縁層の表面
に形成された半導電性の外部コロナ防止層とを有する単
体含浸方式の固定子コイルにおいて、前記半導電性の外
部コロナ防止層がゴム弾性を有する半導電性塗膜層から
なるものとする。[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a molded coil conductor and a mica tape layer wrapped around the outside thereof are impregnated with a thermosetting resin under vacuum pressure, and cured by heating. A single impregnation type stator coil having a main insulating layer formed of the above-mentioned main insulating layer and a semiconductive external corona prevention layer formed on the surface of the main insulating layer in a portion inserted into a coil slot of a stator core of a rotating electric machine. In this case, the semiconductive external corona prevention layer is composed of a semiconductive coating layer having rubber elasticity.
【０００７】また、外部コロナ防止層としての半導電性
塗膜層が、カーボン粉末を適量含むシリコーンコンパウ
ンド塗料の硬化膜からなるものとする。[0007] Further, the semiconductive coating layer as the external corona prevention layer is made of a cured film of a silicone compound coating containing an appropriate amount of carbon powder.
【０００８】さらに、外部コロナ防止層としての半導電
性塗膜層がコイルスロットの内壁面に直接接触するよう
収納されてなるものとする。Furthermore, a semiconductive coating layer as an external corona prevention layer is housed in direct contact with the inner wall surface of the coil slot.
【０００９】[0009]
【作用】この発明の構成において、単体含浸方式の固定
子コイルの外部コロナ防止層をゴム弾性を有する半導電
性塗膜層としたことにより、固定子鉄心のコイルスロッ
トにコイル入れする際、鉄心との間に生ずる圧縮力で外
部コロナ防止層が圧縮変形し、弾力性を保持した状態で
スロット内の隙間を埋めるので、外部コロナの発生を阻
止できるとともに、固定子コイルを固定子鉄心のスロッ
ト内に弾力性を保持して固定する機能が得られる。[Function] In the structure of the present invention, the external corona prevention layer of the stator coil of the single impregnation method is made of a semiconductive coating layer with rubber elasticity, so that when the coil is inserted into the coil slot of the stator core, the core The external corona prevention layer compressively deforms due to the compressive force generated between the two and fills the gap in the slot while retaining its elasticity, which prevents the generation of external corona and also connects the stator coil to the slot of the stator core. The function of retaining elasticity and fixing is obtained.
【００１０】また、半導電性塗膜層をカーボン粉末を適
量含むシリコーンコンパウンド塗料の硬化膜とすれば、
半導電性シリコーンコンパウンド塗料の硬化膜の優れた
弾力性を生かして隙間を容易且つ完全に埋められるとと
もに、優れた耐熱性を生かして枯れ収縮が少なく長期安
定性に優れた外部コロナ防止層を形成することができる
。[0010] Furthermore, if the semiconductive coating layer is a cured film of a silicone compound coating containing an appropriate amount of carbon powder,
Utilizing the excellent elasticity of the cured film of the semiconductive silicone compound paint, gaps can be filled easily and completely, and by utilizing its excellent heat resistance, it forms an external corona prevention layer with little drying and shrinkage and excellent long-term stability. can do.
【００１１】さらに、ゴム弾性を有する外部コロナ防止
層がスロットライナーの機能を兼ねるので、スロットラ
イナーを省略してコイル入れを容易化でき、コイル入れ
作業を省力化，省時間化する機能が得られるとともに、
外部コロナ防止層がゴム弾性を保持してスロットの内壁
面に全面接触し、外部コロナの発生を阻止する機能が得
られる。Furthermore, since the outer corona prevention layer having rubber elasticity also functions as a slot liner, the slot liner can be omitted to facilitate coil insertion, and the function of saving labor and time in coil insertion work can be obtained. With,
The external corona prevention layer maintains rubber elasticity and fully contacts the inner wall surface of the slot, thereby providing a function of preventing external corona from occurring.
【００１２】0012
【実施例】以下、この発明を実施例に基づいて説明する
。図１はこの発明の実施例になる回転電機の固定子コイ
ルを示す断面図であり、従来技術と同じ部分には同一参
照符号を付し、重複した説明を省略する。図において、
整列コイル導体２の外側に単体含浸方式で形成された主
絶縁層３の表面上には、固定子鉄心のコイルスロットの
長さより幾分長い範囲にゴム弾性を有する外部コロナ防
止層１１が半導電性塗膜層として形成され、固定子コイ
ル１０を構成する。ゴム弾性を有する外部コロナ防止層
１１は、シリコーンコンパウンドに重量比１ないし５％
程度のカーボン粉末を配合し、トルエン，キシレン等の
溶剤を加えて粘度調整した半導電性のシリコーンコンパ
ウンド塗料が用いられ、この塗料を主絶縁層３の表面に
所定の厚みで塗布した後、常温硬化または加熱硬化処理
することにより、半導電性のシリコーンコンパウンド塗
料の硬化膜からなる弾力性を有する外部コロナ防止層１
１が形成される。EXAMPLES The present invention will be explained below based on examples. FIG. 1 is a cross-sectional view showing a stator coil of a rotating electric machine according to an embodiment of the present invention, and the same parts as in the prior art are given the same reference numerals and redundant explanation will be omitted. In the figure,
On the surface of the main insulating layer 3 formed on the outside of the aligned coil conductors 2 by a single impregnation method, an external corona prevention layer 11 having rubber elasticity is coated with semi-conducting material over a range slightly longer than the length of the coil slots of the stator core. The stator coil 10 is formed as a transparent coating layer and constitutes the stator coil 10. The outer corona prevention layer 11 having rubber elasticity is made of a silicone compound with a weight ratio of 1 to 5%.
A semi-conductive silicone compound paint is used, which is blended with a certain amount of carbon powder and has its viscosity adjusted by adding a solvent such as toluene or xylene. After applying this paint to the surface of the main insulating layer 3 to a predetermined thickness, An elastic external corona prevention layer 1 made of a cured film of a semiconductive silicone compound paint is formed by curing or heat curing treatment.
1 is formed.
【００１３】図２は実施例になる固定子コイルをコイル
スロットにコイル入れした状態を示す要部の断面図であ
り、スロットライナーを省略した状態を例に示してある
。すなわち、シリコーンコンパウンド塗料の硬化膜から
なる外部コロナ防止層１１の持つゴム弾性をスロット６
内の隙間の調整に活用するためには、外部コロナ防止層
の厚みをなるべく厚くして圧縮荷重による収縮量を増す
ことが有効である。そこで、外部コロナ防止層１１の厚
みを、外部コロナ防止層の従来の厚み（０．１ｍｍ ）
にスロットライナーが占めていた隙間に相当する厚み（
０．３〜０．５ｍｍ）を加え、さらに圧縮荷重による縮
み代として上記寸法の２０〜５０％を加えた厚みとする
ことにより、コイルスロット６に押し込まれた固定子コ
イル１０の外部コロナ防止層１１は押し縮められた状態
でゴム弾性を保持して鉄心との間の隙間を埋め、固定子
コイル１０を固定子鉄心５のコイルスロット６内に弾力
性を保持して固定することができる。FIG. 2 is a cross-sectional view of the main part of the stator coil according to the embodiment, showing the state in which the coil is inserted into the coil slot, and the state in which the slot liner is omitted is shown as an example. That is, the rubber elasticity of the outer corona prevention layer 11 made of a cured film of silicone compound paint is applied to the slot 6.
In order to utilize this for adjusting the internal gap, it is effective to make the thickness of the external corona prevention layer as thick as possible to increase the amount of contraction due to compressive load. Therefore, the thickness of the external corona prevention layer 11 was changed to the conventional thickness of the external corona prevention layer (0.1 mm).
The thickness corresponds to the gap occupied by the slot liner (
By adding 0.3 to 0.5 mm) and further adding 20 to 50% of the above dimensions as a shrinkage allowance due to compressive load, the outer corona prevention layer of the stator coil 10 pushed into the coil slot 6 is 11 retains rubber elasticity in a compressed state to fill the gap between the stator coil 10 and the iron core, and the stator coil 10 can be fixed within the coil slot 6 of the stator core 5 while retaining its elasticity.
【００１４】また、シリコーンコンパウンド１００に対
して１〜５に相当するカーボン粉末を配合することによ
り、スロットに挿入された状態での外部コロナ防止層１
１の沿層方向の表面抵抗率（１ｃｍ四方の対辺間の抵抗
値で表す）は３ないし十数ＫΩとなり、外部コロナ防止
層１１がスロットの内壁面で適度の圧縮力を保持して鉄
心に全面接触するので、外部コロナ防止層１１の電位を
鉄心５と同じ大地電位に保持して外部コロナ放電の発生
をほぼ完全に阻止できるとともに、適度の表面抵抗率を
保持して外部コロナ防止層に流れる循環電流を阻止する
ことができる。さらに、シリコーンコンパウンド塗料の
硬化膜は、優れた耐熱性を有するので、回転電機の運転
温度に長期間曝されても枯れ収縮することがなく、適度
のゴム弾性を安定して保持するとともに、電磁力による
振動や熱伸縮を弾性吸収して磨耗や損傷を防止するので
、外部コロナの防止機能や耐熱，対磨耗性能の長期安定
性に優れた外部コロナ防止層を備えた回転電機の固定子
コイルが得られる。なお、コイル入れの際外部コロナ防
止層１１の損傷を防ぎ、コイル入れ作業を容易化するた
めに、スロットライナーを１枚程度滑り材として使用し
てよいことは言うまでもないことである。[0014] Furthermore, by blending carbon powder in an amount of 1 to 5 parts with respect to 100 parts of the silicone compound, the outer corona prevention layer 1 can be
The surface resistivity (represented by the resistance value between opposite sides of 1 cm square) in the longitudinal direction of No. 1 is 3 to more than ten KΩ, and the external corona prevention layer 11 maintains a moderate compressive force on the inner wall surface of the slot and is applied to the core. Since the entire surface contacts, it is possible to maintain the potential of the external corona prevention layer 11 at the same ground potential as the iron core 5 and almost completely prevent the occurrence of external corona discharge. Circulating current can be blocked. Furthermore, the cured film of silicone compound paint has excellent heat resistance, so it does not wither and shrink even when exposed to the operating temperature of rotating electric machines for a long period of time, stably maintains appropriate rubber elasticity, and Stator coils for rotating electric machines are equipped with an external corona prevention layer that elastically absorbs force-induced vibrations and thermal expansion and contraction to prevent wear and damage, and has excellent long-term stability in external corona prevention function, heat resistance, and wear resistance. is obtained. It goes without saying that about one slot liner may be used as a sliding material in order to prevent damage to the external corona prevention layer 11 during coil insertion and to facilitate the coil insertion work.
【００１５】[0015]
【発明の効果】この発明は前述のように、単体含浸方式
の固定子コイルの外部コロナ防止層をゴム弾性を有する
半導電性塗膜層としたことにより、固定子鉄心のコイル
スロットにコイル入れする際、鉄心との間に生ずる圧縮
力で外部コロナ防止層が圧縮変形し、弾力性を保持した
状態でスロット内の隙間を埋めるので、スロットライナ
ーの重ね枚数で隙間を埋める従来技術でどうしても残っ
てしまう隙間を排して外部コロナの発生を阻止できると
ともに、固定子コイルを固定子鉄心のスロット内に適度
のゴム弾性を保持して固定できる機能に優れた外部コロ
ナ防止層を有する回転電機の固定子コイルを提供するこ
とができる。Effects of the Invention As described above, the present invention uses a semiconductive coating layer with rubber elasticity as the external corona prevention layer of the single impregnation type stator coil, thereby making it easier to insert the coil into the coil slot of the stator core. When the outer corona prevention layer is compressed and deformed by the compressive force generated between it and the iron core, it fills the gap in the slot while maintaining its elasticity. The rotary electric machine has an external corona prevention layer that has an excellent function of preventing the generation of external corona by eliminating the gaps that would otherwise occur, and also fixing the stator coil in the slot of the stator core with appropriate rubber elasticity. A stator coil can be provided.
【００１６】また、半導電性塗膜層をカーボン粉末を適
量含むシリコーンコンパウンド塗料の硬化膜とすれば、
シリコーンコンパウンド塗料の優れた弾力性を生かして
隙間を容易且つ完全に埋められるとともに、優れた耐熱
性を生かし、従来問題とされたスロットライナーの枯れ
収縮に起因する隙間の増大と、これに伴う外部コロナの
発生を回避でき、したがって長期安定性に優れた外部コ
ロナ防止層を備えた固定子コイルを提供することができ
る。Furthermore, if the semiconductive coating layer is a cured film of a silicone compound coating containing an appropriate amount of carbon powder,
The silicone compound paint's excellent elasticity allows it to easily and completely fill gaps, and its excellent heat resistance eliminates the conventional problems of increasing gaps caused by drying and shrinking of slot liners and the resulting external appearance. It is possible to provide a stator coil with an external corona prevention layer that can avoid the generation of corona and therefore has excellent long-term stability.
【００１７】さらに、ゴム弾性を有する外部コロナ防止
層がスロットライナーの機能を兼ねるので、スロットラ
イナーを省略して外部コロナ防止層を適度の弾力性を保
持してスロットの内壁面に全面接触させ、外部コロナ防
止層を大地電位に保持できるとともに、従来スロットラ
イナーを用いた隙間調整に要した工数を排除してコイル
入れ作業を容易化できるので、回転電機の製造コストの
低減にも貢献できる利点が得られる。Furthermore, since the outer corona prevention layer having rubber elasticity also functions as a slot liner, the slot liner is omitted and the outer corona prevention layer maintains appropriate elasticity and is brought into full contact with the inner wall surface of the slot. In addition to keeping the external corona prevention layer at ground potential, it also eliminates the man-hours required for gap adjustment using conventional slot liners, making it easier to insert the coil, which has the advantage of contributing to reducing the manufacturing cost of rotating electrical machinery. can get.
【図１】この発明の実施例になる回転電機の単体含浸方
式の固定子コイルを示す断面図[Fig. 1] A cross-sectional view showing a single impregnation type stator coil of a rotating electric machine according to an embodiment of the present invention.
【図２】実施例になる固定子コイルをスロットに収納し
た状態を示す要部の断面図[Fig. 2] A cross-sectional view of the main parts showing a state in which the stator coil according to the embodiment is housed in the slot.
【図３】従来の固定子コイルを示す外形図[Figure 3] External diagram showing a conventional stator coil
【図４】従来
の固定子コイルをコイルスロットに収納した状態を示す
要部の断面図[Fig. 4] Cross-sectional view of main parts showing a state in which a conventional stator coil is housed in a coil slot
１ 固定子コイル ２ 整列コイル導体 ３ 主絶縁層 ４ 外部コロナ防止層 ５ 固定子鉄心 ６ コイルスロット ７ スロットライナー １０ 固定子コイル 1 Stator coil 2 Aligned coil conductor 3 Main insulation layer 4 External corona prevention layer 5 Stator core 6 Coil slot 7 Slot liner 10 Stator coil
Claims (3)
イカテープ層に熱硬化性樹脂を真空加圧含浸，加熱硬化
してなる主絶縁層と、回転電機固定子鉄心のコイルスロ
ットに挿入される部分の前記主絶縁層の表面に形成され
た半導電性の外部コロナ防止層とを有する単体含浸方式
の固定子コイルにおいて、前記半導電性の外部コロナ防
止層がゴム弾性を有する半導電性塗膜層からなることを
特徴とする回転電機の固定子コイル。Claim 1: A formed coil conductor, a main insulating layer made by impregnating a mica tape layer wrapped around the outside with a thermosetting resin under vacuum pressure and curing by heating, and inserted into a coil slot of a stator core of a rotating electric machine. In the single impregnation type stator coil, the stator coil has a semiconductive external corona prevention layer formed on the surface of the main insulating layer in a portion where the semiconducting external corona prevention layer has rubber elasticity. A stator coil for a rotating electrical machine characterized by comprising a transparent coating layer.
が、カーボン粉末を適量含むシリコーンコンパウンド塗
料の硬化膜からなることを特徴とする請求項１記載の回
転電機の固定子コイル。2. The stator coil for a rotating electric machine according to claim 1, wherein the semiconductive coating layer as the external corona prevention layer is made of a cured film of a silicone compound coating containing an appropriate amount of carbon powder.
がコイルスロットの内壁面に直接接触するよう収納され
てなることを特徴とする請求項１記載の回転電機の固定
子コイル。3. The stator coil for a rotating electric machine according to claim 1, wherein the semiconductive coating layer as an external corona prevention layer is housed in direct contact with the inner wall surface of the coil slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP176891A JPH04236143A (en) | 1991-01-11 | 1991-01-11 | Stator coil for electric rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP176891A JPH04236143A (en) | 1991-01-11 | 1991-01-11 | Stator coil for electric rotating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04236143A true JPH04236143A (en) | 1992-08-25 |
Family
ID=11510761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP176891A Pending JPH04236143A (en) | 1991-01-11 | 1991-01-11 | Stator coil for electric rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04236143A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007174816A (en) * | 2005-12-22 | 2007-07-05 | Mitsubishi Electric Corp | Stator of rotating electric machine and its manufacturing method |
| WO2020235045A1 (en) * | 2019-05-22 | 2020-11-26 | 三菱電機株式会社 | Stator coil and stator comprising said stator coil, rotating electrical machine, and manufacturing method for stator coil |
-
1991
- 1991-01-11 JP JP176891A patent/JPH04236143A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007174816A (en) * | 2005-12-22 | 2007-07-05 | Mitsubishi Electric Corp | Stator of rotating electric machine and its manufacturing method |
| WO2020235045A1 (en) * | 2019-05-22 | 2020-11-26 | 三菱電機株式会社 | Stator coil and stator comprising said stator coil, rotating electrical machine, and manufacturing method for stator coil |
| CN113812067A (en) * | 2019-05-22 | 2021-12-17 | 三菱电机株式会社 | Stator coil, stator and rotating electrical machine provided with same, and method for manufacturing stator coil |
| US11984782B2 (en) | 2019-05-22 | 2024-05-14 | Mitsubishi Electric Corporation | Stator coil and stator comprising said stator coil, rotating electrical machine, and manufacturing method for stator coil |
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