JP2010028943A - Half-conductive varnish for electric field relaxation, tape, and stator of rotating electrical machine - Google Patents

Half-conductive varnish for electric field relaxation, tape, and stator of rotating electrical machine Download PDF

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JP2010028943A
JP2010028943A JP2008185638A JP2008185638A JP2010028943A JP 2010028943 A JP2010028943 A JP 2010028943A JP 2008185638 A JP2008185638 A JP 2008185638A JP 2008185638 A JP2008185638 A JP 2008185638A JP 2010028943 A JP2010028943 A JP 2010028943A
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tape
electric field
stator
semiconductive
field relaxation
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Masaru Sadakata
勝 定方
Masahiro Takeno
正宏 竹野
Tetsushi Okamoto
徹志 岡本
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Toshiba Corp
Toshiba Mitsubishi Electric Industrial Systems Corp
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Toshiba Corp
Toshiba Mitsubishi Electric Industrial Systems Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide half-conductive varnish for electric field relaxation, which easily sets a resistance value, has less dispersion of the resistance value and has sufficient stability of the resistance value and to provide a tape and a stator of a rotating electrical machine. <P>SOLUTION: In the stator of the rotating electrical machine, a stator coil 13 where a low resistance tape 17 is wound onto a main insulating layer 15 on a coil conductor 14 is stored in a slot 12 of a stator core 11. In the stator coil 13, half-conductive varnish for electric field relaxation, where at least two fills selected from a plurality of types of silicon carbide and triiron tetroxide whose granularity meshes are not less than #240 (average granularity is not more than 80 &mu;m), and adhesive of polybutadiene resin or silicone varnish are mixed at a prescribed rate is applied to a surface from an end of the low resistance tape 17 of a linear part 16b extending from the slot 12 to the main insulating layer 15. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、高電圧で使用される発電機や電動機などの高電圧電気機器等に用いられる電界緩和用半導電性ワニス及びテープ並びに回転電機の固定子に関する。   The present invention relates to a semiconducting varnish and tape for electric field relaxation used for high voltage electrical equipment such as a generator and an electric motor used at a high voltage, and a stator of a rotating electrical machine.

先ず、図１２を参照して背景技術を説明する。図１２は回転電機の固定子の部分断面図である。   First, the background art will be described with reference to FIG. FIG. 12 is a partial cross-sectional view of the stator of the rotating electrical machine.

従来の高電圧で使用される発電機や電動機などの回転電機の固定子は、図１２に示すように、固定子鉄心１に形成されたスロット２内に固定子コイル３を挿入固定するようにして構成されている。また固定子コイル３は、コイル導体４に絶縁テープを巻くことにより絶縁層５としている。   As shown in FIG. 12, a conventional stator of a rotating electrical machine such as a generator or an electric motor used at a high voltage has a stator coil 3 inserted and fixed in a slot 2 formed in the stator core 1. Configured. The stator coil 3 is formed as an insulating layer 5 by winding an insulating tape around the coil conductor 4.

そして、固定子コイル３は、固定子鉄心１のスロット２内に挿入する直線部６ａと、スロット２から外方に延出した直線部６ｂと、コイルエンドとなる湾曲部６ｃとからなっており、スロット２内に挿入する直線部６ａとスロット２から延出した直線部６ｂの絶縁層５の上に低抵抗テープ７が巻かれた状態で、固定子鉄心１のスロット２内に挿入され、含浸樹脂等により一体化されている。   The stator coil 3 includes a straight portion 6a inserted into the slot 2 of the stator core 1, a straight portion 6b extending outward from the slot 2, and a curved portion 6c serving as a coil end. In a state where the low resistance tape 7 is wound on the insulating layer 5 of the straight portion 6a inserted into the slot 2 and the straight portion 6b extending from the slot 2, the low resistance tape 7 is inserted into the slot 2 of the stator core 1. Integrated with impregnating resin or the like.

さらに、スロット２から延出した低抵抗テープ７は、端部とこの端部からコイルエンド方向に露出する絶縁層５の上に巻かれた半導電性テープ８によって、その端縁部が覆われている。これにより、固定子コイル３に高電圧が印加された際、接地側の固定子鉄心１と高電圧のコイル導体４に挟まれた絶縁層５の表面に電界が発生し、低抵抗テープ７と半導電性テープ８とが機能してコロナ放電が抑制されるようになっている。また、さらに高電圧が印加され、こうした構成では緩和しきれない場合には、低抵抗テープ７を多重に巻き、場合によっては、半導電性テープ８をコイルエンドの湾曲部６ｃにまで延長して巻くようにしている。   Further, the low resistance tape 7 extending from the slot 2 is covered at its edge by a semiconductive tape 8 wound on the end and the insulating layer 5 exposed from the end toward the coil end. ing. Thereby, when a high voltage is applied to the stator coil 3, an electric field is generated on the surface of the insulating layer 5 sandwiched between the stator core 1 on the ground side and the high voltage coil conductor 4, and the low resistance tape 7 and The semiconductive tape 8 functions to suppress corona discharge. Further, when a higher voltage is applied and cannot be alleviated with such a configuration, the low resistance tape 7 is wound in multiple layers, and in some cases, the semiconductive tape 8 is extended to the curved portion 6c at the coil end. I try to roll it up.

上記のように電界緩和層として用いる半導電性テープ８については、所定量の四酸化三鉄（Ｆｅ３Ｏ４）を接着材に混合し、テープ基材に塗布して形成されていた。そして、半導電性テープ８の抵抗値は、四酸化三鉄と接着剤の混合比によって決まり、若干の変更できるが半導電性テープ８自体の抵抗値のばらつきが大きいため、不均一な電界が発生する可能性があった。 As described above, the semiconductive tape 8 used as the electric field relaxation layer was formed by mixing a predetermined amount of triiron tetroxide (Fe 3 O 4 ) into an adhesive and applying it to a tape base material. The resistance value of the semiconductive tape 8 is determined by the mixing ratio of the ferric tetroxide and the adhesive, and can be slightly changed. However, since the variation in the resistance value of the semiconductive tape 8 itself is large, a non-uniform electric field is generated. Could occur.

また、半導電性テープ８が覆うように巻かれている低抵抗テープ７の端縁部では、低抵抗テープ７の厚みで生じる段差により空隙を生じ、この空隙によって半導電性テープ８では緩和しきれない局部的な電界が発生する可能性があった。特に低抵抗テープ７を多重に巻いた場合には、空隙がより大きなものとなる。こうしたことから、低抵抗テープ７と半導電性テープ８の電気的な接続不良が発生する可能性が高く、それにより半導電性テープ８による電界緩和層が不均一なものとなる可能性があった。   Further, at the edge of the low resistance tape 7 wound so as to cover the semiconductive tape 8, a gap is generated due to a level difference caused by the thickness of the low resistance tape 7, and the semiconductive tape 8 is relaxed by this gap. There was a possibility that a local electric field could not be generated. In particular, when the low resistance tape 7 is wound in multiple layers, the gap becomes larger. For this reason, there is a high possibility that a poor electrical connection between the low-resistance tape 7 and the semiconductive tape 8 will occur, which may cause the electric field relaxation layer of the semiconductive tape 8 to be uneven. It was.

さらに、上記の半導電性テープ８は、若干の粘着性があり、その粘着性によってテープ巻き作業中に半導電性テープ８が絶縁層５または低抵抗テープ７に粘着することになり、皺ができないようにきれいに巻くことができない状況にあった。   Further, the semiconductive tape 8 has a slight adhesiveness, and the adhesive property causes the semiconductive tape 8 to adhere to the insulating layer 5 or the low resistance tape 7 during the tape winding operation. I was in a situation where I couldn't wind as cleanly as I could.

なお、電界緩和層を有する固定子コイルの構成としては、例えば、特許文献１には、導体表面を覆うように主絶縁層を設け、その外側に表面コロナ防止層として、半導電性応力緩和層を有し２層で形成された半導電性繊維テープのテーピング層の間に複合半導電性シートを設けて構成し、さらに固定子鉄心のスロット内に納め、含浸樹脂の硬化によって一体化されるようにしたものがある。
特開平６−３８４２４号公報 As a configuration of a stator coil having an electric field relaxation layer, for example, in Patent Document 1, a main insulating layer is provided so as to cover a conductor surface, and a semiconductive stress relaxation layer is provided as a surface corona prevention layer on the outer side. A composite semiconductive sheet is provided between taping layers of a semiconductive fiber tape formed of two layers, and is further accommodated in a slot of the stator core and integrated by curing the impregnating resin. There is something like that.
JP-A-6-38424

上記のような状況に鑑みて本発明はなされたもので、その目的とするところは電界緩和のための抵抗値設定がしやすく、かつ抵抗値ばらつきが少なく、また抵抗値の安定性が良好である電界緩和用半導電性ワニス及びテープ並びに回転電機の固定子を提供することにある。   The present invention has been made in view of the above situation, and the purpose of the present invention is to easily set a resistance value for electric field relaxation, there is little variation in resistance value, and the stability of the resistance value is good. An object of the present invention is to provide a certain semiconductive varnish and tape for electric field relaxation and a stator of a rotating electric machine.

本発明の電界緩和用半導電性ワニス及びテープ並びに回転電機の固定子は、
電界緩和用半導電性ワニスが、
粒度メッシュが＃２４０以上（平均粒度８０μｍ以下）である複数種類の炭化珪素と四酸化三鉄のうちから選択された少なくとも２つの充填材と、ポリブタジエン樹脂、シリコーンワニスのいずれか一方の接着材とを、それぞれ所定の割合で混合して形成したことを特徴とするものであり、
また、四酸化三鉄、粒度メッシュが＃２４０である炭化珪素、粒度メッシュが＃８００である炭化珪素、粒度メッシュが＃３０００である炭化珪素のうちの少なくとも２つでなる充填材と、ポリブタジエン樹脂、シリコーンワニスのいずれか一方の接着材とを、それぞれ所定の割合で混合して形成したことを特徴とするものである。 The semiconductive varnish and tape for electric field relaxation of the present invention and the stator of the rotating electrical machine are:
Semi-conductive varnish for electric field relaxation
At least two fillers selected from a plurality of types of silicon carbide having a particle size mesh of # 240 or more (average particle size of 80 μm or less) and triiron tetroxide, and an adhesive of any one of a polybutadiene resin and a silicone varnish; Are each formed by mixing at a predetermined ratio,
And a filler comprising at least two of triiron tetroxide, silicon carbide having a particle size mesh of # 240, silicon carbide having a particle size mesh of # 800, silicon carbide having a particle size mesh of # 3000, and polybutadiene resin And any one of the adhesives of the silicone varnish is mixed at a predetermined ratio.

電界緩和用半導電性テープが、
上記電界緩和用半導電性ワニスをテープ基材に塗布、含浸して形成した半導電性ワニス層が、該テープ基材の片面又は両面に設けられていることを特徴とするものであり、
さらに、前記テープ基材が、ガラスクロスであることを特徴とするものであり、
さらに、前記テープ基材が、ガラス繊維と有機繊維とを混紡した織布又は不織布であることを特徴とするものであり、
また、上記電界緩和用半導電性ワニスを有機材料フィルムに塗布して形成した半導電性ワニス層が、該有機材料フィルムの片面又は両面に設けられていることを特徴とするものである。 Semi-conductive tape for electric field relaxation
A semiconductive varnish layer formed by applying and impregnating the semiconductive varnish for electric field relaxation to a tape base material is provided on one side or both sides of the tape base material,
Furthermore, the tape base material is a glass cloth,
Furthermore, the tape base material is characterized in that it is a woven fabric or a nonwoven fabric obtained by mixing glass fibers and organic fibers,
Moreover, the semiconductive varnish layer formed by applying the semiconductive varnish for electric field relaxation to an organic material film is provided on one side or both sides of the organic material film.

回転電機の固定子が、
固定子鉄心の所定スロット内に、導体部に絶縁テープを巻回して形成した主絶縁層を有すると共に、前記スロットに挿入する直線部分と該スロットから延出する直線部分のスロット側部分の前記主絶縁層上に低抵抗テープを巻回して形成した低抵抗層を備え、所定形状に整形された固定子コイルを納めて形成した回転電機の固定子であって、前記固定子コイルは、延出する前記直線部分の前記低抵抗層の端部分から延出する前記直線部分の主絶縁層にかけての表面に、又は延出する前記直線部分及び該固定子コイルのコイルエンドの主絶縁層にかけての表面に、上記の電界緩和用半導電性ワニスが塗布されていることを特徴とするものであり、
また、固定子鉄心の所定スロット内に、導体部に絶縁テープを巻回して形成した主絶縁層を有すると共に、前記スロットに挿入する直線部分と該スロットから延出する直線部分のスロット側部分の前記主絶縁層上に低抵抗テープを巻回して形成した低抵抗層を備え、所定形状に整形された固定子コイルを納めて形成した回転電機の固定子であって、前記固定子コイルは、延出する前記直線部分の前記低抵抗層の端部分から延出する前記直線部分の主絶縁層にかけての表面に、又は延出する前記直線部分及び該固定子コイルのコイルエンドの主絶縁層にかけての表面に、上記の電界緩和用半導電性テープが設けられていることを特徴とするものであり、
さらに、前記低抵抗層が、前記低抵抗テープによる多重層構造であると共に、該低抵抗層の端部が階段状に形成され、階段状の該端部を覆うように前記電界緩和用半導電性ワニス又は前記電界緩和用半導電性テープが設けられていることを特徴とするものであり、
さらに、前記低抵抗層が、前記低抵抗テープによる多重層構造であると共に、前記電界緩和用半導電性ワニス又は前記電界緩和用半導電性テープの端部が、前記低抵抗テープの下側、または前記低抵抗テープの層間に入り込むように設けられていることを特徴とするものである。 The stator of the rotating electrical machine
A main insulating layer formed by winding an insulating tape around a conductor portion in a predetermined slot of the stator core, and the main portion of the straight portion inserted into the slot and the slot side portion of the straight portion extending from the slot. A stator of a rotating electrical machine comprising a low resistance layer formed by winding a low resistance tape on an insulating layer and containing a stator coil shaped into a predetermined shape, wherein the stator coil extends The surface of the linear portion extending from the end portion of the low resistance layer to the main insulating layer, or the surface of the linear portion extending to the main insulating layer of the coil end of the stator coil In addition, the above-mentioned semiconductive varnish for electric field relaxation is applied,
In addition, a main insulating layer formed by winding an insulating tape around the conductor portion is provided in a predetermined slot of the stator core, and a straight portion inserted into the slot and a portion on the slot side of the straight portion extending from the slot are provided. A stator of a rotating electrical machine that includes a low resistance layer formed by winding a low resistance tape on the main insulating layer, and that includes a stator coil shaped into a predetermined shape, the stator coil comprising: The surface of the linear portion extending from the end portion of the low resistance layer to the main insulating layer of the linear portion or the main portion of the linear portion and the coil end of the stator coil that extends. Is characterized in that the electric field relaxation semiconductive tape is provided on the surface of
Further, the low-resistance layer has a multilayer structure of the low-resistance tape, and an end portion of the low-resistance layer is formed in a step shape, and the electric field relaxation semiconducting so as to cover the step-shaped end portion. Varnish or semi-conductive tape for electric field relaxation is provided,
Further, the low-resistance layer has a multilayer structure of the low-resistance tape, and an end portion of the electric field relaxation semiconductive varnish or the electric field relaxation semiconductive tape is located under the low resistance tape, Alternatively, the low-resistance tape is provided so as to enter between layers.

本発明によれば、電界緩和のための抵抗値設定がしやすくなり、また抵抗値のばらつきを少なくでき、さらに抵抗値の安定性が良好である等の効果を有する。   According to the present invention, it is easy to set a resistance value for electric field relaxation, variation in the resistance value can be reduced, and further, the resistance value has good stability.

以下本発明の実施の形態を、図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

先ず第１の実施形態を図１乃至図３により説明する。図１は回転電機の固定子の部分断面図であり、図２は半導電性ワニスの構成を説明するための図であり、図３は本実施形態の変形形態に係る回転電機の固定子の部分断面図である。   First, a first embodiment will be described with reference to FIGS. FIG. 1 is a partial sectional view of a stator of a rotating electrical machine, FIG. 2 is a diagram for explaining a configuration of a semiconductive varnish, and FIG. 3 is a diagram of a stator of a rotating electrical machine according to a modification of the present embodiment. It is a fragmentary sectional view.

図１及び図２において、高電圧で使用される発電機や電動機などの高電圧電気機器等である回転電機の固定子１０は、電磁鋼板を積層する等して形成された固定子鉄心１１に形成されたスロット１２内に、所定形状に整形された固定子コイル１３を挿入、固定するようにして構成されている。また固定子コイル１３は、コイル導体１４にガラス基材集成マイカなどのマイカテープでなる絶縁テープを巻くことにより主絶縁層１５としている。   1 and 2, a stator 10 of a rotating electric machine that is a high-voltage electric device such as a generator or an electric motor that is used at a high voltage is attached to a stator core 11 that is formed by laminating electromagnetic steel sheets or the like. A stator coil 13 shaped into a predetermined shape is inserted and fixed in the formed slot 12. In addition, the stator coil 13 is formed as a main insulating layer 15 by winding an insulating tape made of mica tape such as glass substrate laminated mica around the coil conductor 14.

そして、固定子コイル１３は、固定子鉄心１１のスロット１２内に挿入する直線部１６ａと、スロット１２から外方に延出した直線部１６ｂと、コイルエンドとなる湾曲部１６ｃとからなり、スロット１２内に挿入する直線部１６ａとスロット１２から延出した直線部１６ｂのスロット側部分の主絶縁層１５上に、低抵抗層を形成する低抵抗テープ１７が巻回された状態で、固定子鉄心１１のスロット１２内に挿入され、含浸樹脂等により一体化されている。   The stator coil 13 includes a straight portion 16a inserted into the slot 12 of the stator core 11, a straight portion 16b extending outward from the slot 12, and a curved portion 16c serving as a coil end. In a state where a low resistance tape 17 forming a low resistance layer is wound on the main insulating layer 15 of the slot side portion of the linear portion 16a inserted into the slot 12 and the linear portion 16b extending from the slot 12, the stator It is inserted into the slot 12 of the iron core 11 and integrated with an impregnating resin or the like.

さらに、固定子コイル１３は、スロット１２から延出した低抵抗テープ１７の端部と直線部１６ｂ上の主絶縁層１５には、コイルエンド方向にかけて電界緩和用半導電性ワニス１８が塗布され、それによって低抵抗テープ１７の端縁部１９と主絶縁層１５表面の接触部分が覆われた状態になっている。このように半導電性ワニス１８を塗布することで、半導電性ワニス１８が電界緩和層として機能し、固定子コイル１３に高電圧が印加された際、固定子鉄心１１とコイル導体１４に挟まれた主絶縁層１５の表面での電界発生に伴うコロナ放電が抑制される。   Further, the stator coil 13 is coated with a semiconductive varnish 18 for electric field relaxation in the coil end direction on the end of the low resistance tape 17 extending from the slot 12 and the main insulating layer 15 on the linear portion 16b. As a result, the contact portion between the edge 19 of the low resistance tape 17 and the surface of the main insulating layer 15 is covered. By applying the semiconductive varnish 18 in this manner, the semiconductive varnish 18 functions as an electric field relaxation layer and is sandwiched between the stator core 11 and the coil conductor 14 when a high voltage is applied to the stator coil 13. Corona discharge accompanying the generation of an electric field on the surface of the main insulating layer 15 is suppressed.

この電界緩和層として機能する半導電性ワニス１８は、例えば図２に示すワニスＮｏ．１によって構成されている。またワニスＮｏ．１は、接着材の１〜５０重量％のポリブタジエン樹脂に、充填材の１０〜３０重量％の四酸化三鉄（Ｆｅ３Ｏ４）と７０〜４０重量％の粒度メッシュが＃８００（平均粒度２０μｍ）の炭化珪素（ＳｉＣ）とを、電界緩和のための適正な抵抗値となるようにそれぞれの含有量を図２に示す範囲内で調整すると共に、粘度も塗布しやすい範囲で調整するようにして混合することにより形成されている。またこのような構成とすることで、半導電性ワニス１８は、ばらつきが少なく、安定した抵抗値を有するものとなる。 The semiconductive varnish 18 functioning as the electric field relaxation layer is, for example, a varnish No. 1 shown in FIG. 1. Varnish No. 1 is a polybutadiene resin of 1 to 50% by weight of the adhesive, 10 to 30% by weight of triiron tetroxide (Fe 3 O 4 ) of the filler and a particle size mesh of 70 to 40% by weight of # 800 (average particle size) 20 μm) of silicon carbide (SiC) is adjusted so that the respective contents are adjusted within the range shown in FIG. 2 so as to have an appropriate resistance value for electric field relaxation, and the viscosity is adjusted within a range where it can be easily applied. It is formed by mixing. Moreover, by setting it as such a structure, the semiconductive varnish 18 has little dispersion | variation, and has a stable resistance value.

そして、低抵抗テープ１７の端縁部１９を覆うように半導電性ワニス１８を塗布しているので、端縁部１９によって形成される段差部分の隅々にまで半導電性ワニス１８が行き渡り、段差部分に空隙が生じる可能性が少なくなる。また半導電性ワニス１８が、適正な抵抗値を有するものであるから十分な電界緩和の機能を、安定的に得ることができる。   And since the semiconductive varnish 18 is applied so as to cover the edge 19 of the low-resistance tape 17, the semiconductive varnish 18 spreads to every corner of the step formed by the edge 19, The possibility that a gap is generated in the stepped portion is reduced. Moreover, since the semiconductive varnish 18 has an appropriate resistance value, a sufficient electric field relaxation function can be stably obtained.

なお、半導電性ワニス１８については、さらに図２にワニスＮｏ．２〜Ｎｏ．８に示すように、接着材としては、ポリブタジエン樹脂の他にシリコーンワニスを用いることができ、充填材材料としては、四酸化三鉄、粒度メッシュ＃８００の炭化珪素の他に粒度メッシュ＃２４０（平均粒度８０μｍ）の炭化珪素、粒度メッシュ＃３０００（平均粒度５μｍ）の炭化珪素を用いることができる。そして、接着材と充填材の混合に際し、充填材材料の中から少なくとも２つを選択し、それぞれ電界緩和のための適正な抵抗値となるように含有量を図２の範囲内で調整し、これと含有量を図２の範囲としたいずれか一方の接着材とを混合するようにしてもよく、それによっても同様の効果を得ることができる。   For the semiconductive varnish 18, the varnish no. 2-No. As shown in FIG. 8, a silicone varnish can be used in addition to the polybutadiene resin as the adhesive, and as the filler material, in addition to triiron tetroxide, silicon carbide having a particle size mesh # 800, a particle size mesh # 240 ( Silicon carbide having an average particle size of 80 μm and silicon carbide having a particle size mesh # 3000 (average particle size of 5 μm) can be used. Then, when mixing the adhesive and the filler, select at least two of the filler materials, and adjust the content within the range of FIG. 2 so as to have an appropriate resistance value for electric field relaxation, This and any one of the adhesives whose contents are in the range shown in FIG. 2 may be mixed, and the same effect can be obtained by this.

すなわち、ワニスＮｏ．２は、接着材の１〜５０重量％のポリブタジエン樹脂に、充填材の１０〜３０重量％のメッシュ＃３０００（平均粒度５μｍ）の炭化珪素と７０〜４０重量％の粒度メッシュが＃８００（平均粒度２０μｍ）の炭化珪素とを混合したものであり、ワニスＮｏ．３は、接着材の１〜３０重量％のポリブタジエン樹脂に、充填材の６０〜８０重量％の四酸化三鉄と２０〜１０重量％の粒度メッシュが＃２４０（平均粒度８０μｍ）の炭化珪素とを混合したものであり、ワニスＮｏ．４は、接着材の１〜５０重量％のシリコーンワニスに、充填材の１０〜３０重量％の四酸化三鉄と７０〜４０重量％の粒度メッシュが＃８００（平均粒度２０μｍ）の炭化珪素とを混合したものである。   That is, varnish no. 2 is a polybutadiene resin of 1 to 50% by weight of the adhesive, 10 to 30% by weight of mesh # 3000 (average particle size of 5 μm) silicon carbide and 70 to 40% by weight of particle size mesh of # 800 (average) This is a mixture of silicon carbide having a particle size of 20 μm. 3 is a polybutadiene resin of 1 to 30% by weight of the adhesive, 60 to 80% by weight of triiron tetroxide and 20 to 10% by weight of silicon carbide having a particle size mesh of # 240 (average particle size of 80 μm), and And varnish no. 4 is a silicone varnish of 1 to 50% by weight of the adhesive, 10 to 30% by weight of ferric tetroxide and 70 to 40% by weight of silicon carbide having a particle size mesh of # 800 (average particle size 20 μm) Are mixed.

さらに、ワニスＮｏ．５は、接着材の１〜５０重量％のシリコーンワニスに、充填材の１０〜３０重量％のメッシュ＃３０００（平均粒度５μｍ）の炭化珪素と７０〜４０重量％の粒度メッシュが＃８００（平均粒度２０μｍ）の炭化珪素とを混合したものであり、ワニスＮｏ．６は、接着材の１〜３０重量％のシリコーンワニスに、充填材の６０〜８０重量％の四酸化三鉄と２０〜１０重量％の粒度メッシュが＃２４０（平均粒度８０μｍ）の炭化珪素とを混合したものであり、ワニスＮｏ．７は、接着材の２０〜６０重量％のポリブタジエン樹脂に、充填材の１０〜２０重量％の四酸化三鉄と１０〜２０重量％の粒度メッシュが＃２４０（平均粒度８０μｍ）の炭化珪素、１０〜２０重量％の粒度メッシュが＃８００（平均粒度２０μｍ）の炭化珪素、１０〜２０重量％のメッシュ＃３０００（平均粒度５μｍ）の炭化珪素とをそれぞれ混合したものであり、ワニスＮｏ．８は、接着材の２０〜６０重量％のシリコーンワニスに、充填材の１０〜２０重量％の四酸化三鉄と１０〜２０重量％の粒度メッシュが＃２４０（平均粒度８０μｍ）の炭化珪素、１０〜２０重量％の粒度メッシュが＃８００（平均粒度２０μｍ）の炭化珪素、１０〜２０重量％のメッシュ＃３０００（平均粒度５μｍ）の炭化珪素とをそれぞれ混合したものである。   Furthermore, varnish no. 5 is a silicone varnish of 1-50% by weight of the adhesive, 10-30% by weight of the filler, mesh # 3000 (average particle size 5 μm) silicon carbide and 70-40% by weight of the particle size mesh # 800 (average) This is a mixture of silicon carbide having a particle size of 20 μm. 6 is a silicone varnish of 1 to 30% by weight of the adhesive, 60 to 80% by weight of triiron tetroxide and 20 to 10% by weight of silicon carbide having a particle size mesh of # 240 (average particle size of 80 μm) And varnish no. 7 is a polybutadiene resin of 20 to 60% by weight of the adhesive, 10 to 20% by weight of ferric tetroxide and 10 to 20% by weight of silicon carbide having a particle size mesh of # 240 (average particle size of 80 μm), 10 to 20% by weight of silicon carbide having a particle size mesh of # 800 (average particle size of 20 μm) and 10 to 20% by weight of silicon carbide having a mesh size of # 3000 (average particle size of 5 μm) are mixed. 8 is a silicon varnish of 20 to 60% by weight of the adhesive, 10 to 20% by weight of ferric tetroxide and 10 to 20% by weight of silicon carbide having a particle size mesh of # 240 (average particle size 80 μm), Silicon carbide having a particle size mesh of 10 to 20% by weight is mixed with # 800 (average particle size of 20 μm) and silicon carbide of 10 to 20% by weight of mesh # 3000 (average particle size of 5 μm).

また、充填材材料の含有量については、四酸化三鉄と、炭化珪素のうちでより粒度が大きい粒度メッシュ＃２４０の炭化珪素の含有量を増やすことにより抵抗値を低く設定でき、逆に粒度が大きい粒度メッシュ＃８００の炭化珪素、粒度メッシュ＃３０００の炭化珪素の含有量を増やすことにより抵抗値を高く設定でき、かつ抵抗値のばらつきを少なくすることができ、抵抗値の安定性を確保しやすくなる。こうしたことから、炭化珪素については、図２に示したもの以外に、粒度メッシュ＃２４０以上（平均粒度８０μｍ以下）である複数種類の炭化珪素を対象とし、これら炭化珪素と四酸化三鉄のうちから少なくとも２つを電界緩和のための適正な抵抗値を得るために選択し用いるようにしてもよい。   As for the content of the filler material, the resistance value can be set low by increasing the content of silicon carbide of ferric tetroxide and the larger particle size mesh # 240 of silicon carbide, and conversely the particle size The resistance value can be set high by increasing the content of silicon carbide with large particle size mesh # 800 and silicon carbide with particle size mesh # 3000, and variation in resistance value can be reduced, ensuring stability of resistance value It becomes easy to do. Therefore, in addition to the silicon carbide shown in FIG. 2, silicon carbide targets a plurality of types of silicon carbide having a particle size mesh # 240 or more (average particle size of 80 μm or less). Of these silicon carbide and triiron tetraoxide, At least two may be selected and used to obtain an appropriate resistance value for electric field relaxation.

上記の本実施形態においては、半導電性ワニス１８の塗布範囲を、スロット１２から延出した低抵抗テープ１７の端部からコイルエンド方向に固定子コイル１３の直線部１６ｂ上の主絶縁層１５にかけてとしたが、図３に示す変形形態のように、固定子１０ａを構成してもよい。   In the present embodiment, the application range of the semiconductive varnish 18 is set such that the main insulating layer 15 on the linear portion 16b of the stator coil 13 extends from the end of the low resistance tape 17 extending from the slot 12 toward the coil end. However, the stator 10a may be configured as in the modification shown in FIG.

すなわち、スロット１２から延出した低抵抗テープ１７の端部上と、スロット１２から延出した固定子コイル１３ａの直線部１６ｂ、コイルエンドの湾曲部１６ｃ上の主絶縁層１５とに半導電性ワニス１８を塗布し、低抵抗テープ１７の端縁部１９を覆うようにして、広い範囲で電界緩和を行うようにしてもよい。また、より高い電圧が印加される場合には、図示しないが低抵抗テープ１７を多重に巻いてから半導電性ワニス１８を上記と同様の範囲に塗布して電界緩和を行い、コロナ放電を抑制するようにしてもよい。   That is, it is semiconductive to the end portion of the low resistance tape 17 extending from the slot 12, and to the main insulating layer 15 on the straight portion 16b of the stator coil 13a extending from the slot 12 and the curved portion 16c of the coil end. The varnish 18 may be applied to cover the edge 19 of the low resistance tape 17 so that the electric field is relaxed over a wide range. When a higher voltage is applied, although not shown, the low resistance tape 17 is wound in multiple layers, and then the semiconductive varnish 18 is applied in the same range as described above to reduce the electric field and suppress corona discharge. You may make it do.

次に、第２の実施形態を図４乃至図６により説明する。図４は回転電機の固定子の部分断面図であり、図５は半導電性テープを模式的に示す断面図であり、図６は本実施形態の変形形態に係る半導電性テープを模式的に示す断面図である。なお、第１の実施形態と同一部分には同一符号を付して説明を省略し、第１の実施形態と異なる本実施形態の構成について説明する。   Next, a second embodiment will be described with reference to FIGS. 4 is a partial cross-sectional view of a stator of a rotating electric machine, FIG. 5 is a cross-sectional view schematically showing a semiconductive tape, and FIG. 6 is a schematic view of the semiconductive tape according to a modification of the present embodiment. FIG. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment, description is abbreviate | omitted, and the structure of this embodiment different from 1st Embodiment is demonstrated.

図４及び図５において、高電圧で使用される発電機や電動機などの高電圧電気機器等である回転電機の固定子２０は、固定子鉄心１１に形成されたスロット１２内に、所定形状に整形された固定子コイル２１を挿入、固定するようにして構成されている。また固定子コイル２１は、コイル導体１４に絶縁テープを巻くことにより主絶縁層１５としている。そして、固定子コイル２１は、スロット１２内に挿入する直線部１６ａとスロット１２から延出した直線部１６ｂのスロット側部分の主絶縁層１５上に、低抵抗層を形成する低抵抗テープ１７が巻回された状態で、固定子鉄心１１のスロット１２内に挿入され、含浸樹脂等により一体化されている。   4 and 5, the stator 20 of the rotating electrical machine, which is a high-voltage electric device such as a generator or an electric motor used at a high voltage, has a predetermined shape in a slot 12 formed in the stator core 11. The shaped stator coil 21 is inserted and fixed. The stator coil 21 is formed as a main insulating layer 15 by winding an insulating tape around the coil conductor 14. The stator coil 21 has a low resistance tape 17 that forms a low resistance layer on the main insulating layer 15 on the slot side portion of the linear portion 16a inserted into the slot 12 and the linear portion 16b extending from the slot 12. In a wound state, it is inserted into the slot 12 of the stator core 11 and integrated with an impregnating resin or the like.

さらに、固定子コイル２１は、スロット１２から延出した低抵抗テープ１７の端部と直線部１６ｂ上の主絶縁層１５には、コイルエンド方向にかけて電界緩和用半導電性テープ２２が巻かれ、それによって低抵抗テープ１７の端縁部１９と主絶縁層１５表面の接触部分が覆われた状態になっている。このように半導電性テープ２２が巻かれることで、半導電性テープ２２が電界緩和層として機能し、固定子コイル２１に高電圧が印加された際、第１の実施形態と同様に、固定子鉄心１１とコイル導体１４に挟まれた主絶縁層１５の表面での電界発生に伴うコロナ放電が抑制される。   Further, in the stator coil 21, a semiconductive tape 22 for electric field relaxation is wound around the end of the low resistance tape 17 extending from the slot 12 and the main insulating layer 15 on the straight portion 16b in the coil end direction. As a result, the contact portion between the edge 19 of the low resistance tape 17 and the surface of the main insulating layer 15 is covered. When the semiconductive tape 22 is wound in this way, the semiconductive tape 22 functions as an electric field relaxation layer, and when a high voltage is applied to the stator coil 21, it is fixed as in the first embodiment. Corona discharge accompanying the generation of an electric field on the surface of the main insulating layer 15 sandwiched between the core core 11 and the coil conductor 14 is suppressed.

この電界緩和層として機能する半導電性テープ２２は、例えば第１の実施形態において示した図２におけるワニスＮｏ．１で構成される電界緩和のためのばらつきが少なく、安定した適正な抵抗値を有する半導電性ワニス１８を、ガラスクロス、ガラス繊維と有機繊維とを混紡した織布あるいは不織布や、有機材料フィルム等のテープ基材２３の片面に略均一な厚さに塗布、含浸させるなどして形成されている。なお、図６に示す変形形態のように、半導電性ワニス１８をテープ基材２３の両面に等しい厚さあるいは片面に他面よりも厚く、そして、略均一な厚さに塗布、含浸させるなどして半導電性テープ２２ａを形成するようにしてもよい。また、図５及び図６における１８ａは接着材、１８ｂ、１８ｃは２つの充填材をそれぞれ模式的に示すものである。   The semiconductive tape 22 functioning as the electric field relaxation layer is, for example, varnish No. 2 in FIG. 2 shown in the first embodiment. 1 is a woven or non-woven fabric obtained by mixing glass cloth, glass fiber and organic fiber with a semiconductive varnish 18 having a small and stable variation for electric field relaxation, and an organic material film. It is formed by applying and impregnating a substantially uniform thickness on one side of the tape substrate 23 or the like. Incidentally, as in the modification shown in FIG. 6, the semiconductive varnish 18 is coated and impregnated to a thickness that is equal to both surfaces of the tape base 23 or one surface is thicker than the other surface and is substantially uniform. Thus, the semiconductive tape 22a may be formed. 5 and 6, 18a schematically shows an adhesive, and 18b and 18c schematically show two fillers, respectively.

そして、低抵抗テープ１７の端縁部１９を覆うように半導電性テープ２２を、半導電性ワニス１８が直接端縁部１９を覆うように巻き付けることで、端縁部１９によって形成される段差部分の隅々にまで半導電性ワニス１８がほぼ行き渡り、段差部分に空隙が生じる可能性が少なくなる。また半導電性ワニス１８が、適正な抵抗値を有する半導電性ワニス１８が塗布された半導電性テープ２２を巻き付けるので、十分な電界緩和の機能を、安定的に得ることができ、巻き付けの作業も、半導電性テープ２２が柔軟であるから不均一な電界の発生につながる空隙のもととなる皺が生じる可能性も少ない状態で、比較的簡単に巻くことができる。さらに、両面に半導電性ワニス１８が塗布された半導電性テープ２２ａの場合には、多重に巻き付けた際に半導電性ワニス１８同士が接着し合い、電気的にもより良好な電界緩和層が形成できる巻き付けを行うことができる。   Then, the semiconductive tape 22 is wrapped so that the semiconductive varnish 18 directly covers the end edge 19 so as to cover the end edge 19 of the low resistance tape 17, thereby forming a step formed by the end edge 19. The semiconductive varnish 18 is almost spread to every corner of the portion, and the possibility that a gap is generated in the stepped portion is reduced. Further, since the semiconductive varnish 18 wraps the semiconductive tape 22 coated with the semiconductive varnish 18 having an appropriate resistance value, a sufficient electric field relaxation function can be stably obtained. Since the semiconductive tape 22 is flexible, the work can be wound relatively easily in a state where there is little possibility of generating wrinkles that will cause gaps that lead to generation of a non-uniform electric field. Further, in the case of the semiconductive tape 22a having the semiconductive varnish 18 applied on both sides, the semiconductive varnish 18 adheres to each other when it is wound in multiple layers, and the electric field relaxation layer is also better electrically. The winding which can form can be performed.

なお、半導電性テープ２２を形成するために塗布する半導電性ワニス１８については、第１の実施形態と同様に、図２に示すワニスＮｏ．１によって構成されるワニス以外に、さらに図２に示すワニスＮｏ．２〜Ｎｏ．８の構成や、粒度メッシュが＃２４０以上（平均粒度８０μｍ以下）である複数種類の炭化珪素と四酸化三鉄のうちから選択された少なくとも２つの充填材と、ポリブタジエン樹脂、シリコーンワニスのいずれか一方の接着材とを、それぞれ所定の割合で混合した構成のワニスでも、第１の実施形態と同様の効果を得ることができる。   In addition, about the semiconductive varnish 18 apply | coated in order to form the semiconductive tape 22, varnish No. shown in FIG. In addition to the varnish constituted by the varnish No. 1 shown in FIG. 2-No. 8, at least two fillers selected from silicon carbide and ferric tetroxide having a particle size mesh of # 240 or more (average particle size of 80 μm or less), and any of polybutadiene resin and silicone varnish Even with a varnish having a configuration in which one adhesive is mixed at a predetermined ratio, the same effect as that of the first embodiment can be obtained.

また、本実施形態においても、第１の実施形態の変形形態と同様に、スロット１２から延出した低抵抗テープ１７の端部上と、スロット１２から延出した固定子コイル２１の直線部１６ｂ、コイルエンドの湾曲部１６ｃ上の主絶縁層１５とに半導電性テープ２２を巻き、低抵抗テープ１７の端縁部１９を覆うようにして、広い範囲で電界緩和を行ないコロナ放電を抑制するようにしてもよい。   Also in this embodiment, similar to the modification of the first embodiment, the linear portion 16b of the stator coil 21 extending from the slot 12 and the end of the low resistance tape 17 extending from the slot 12 are also provided. Then, a semiconductive tape 22 is wound around the main insulating layer 15 on the curved portion 16c of the coil end so as to cover the end edge portion 19 of the low resistance tape 17, and electric field relaxation is performed over a wide range to suppress corona discharge. You may do it.

次に、第３の実施形態を図７乃至図１１により説明する。図７は回転電機の固定子の部分断面図であり、図８は図７の要部を示す部分断面図であり、図９乃至図１１は本実施形態の第１乃至第３変形形態に係る回転電機の固定子の要部を示す部分断面図である。なお、第１及び第２の実施形態と同一部分には同一符号を付して説明を省略し、第１及び第２の実施形態と異なる本実施形態の構成について説明する。   Next, a third embodiment will be described with reference to FIGS. FIG. 7 is a partial cross-sectional view of a stator of a rotating electrical machine, FIG. 8 is a partial cross-sectional view showing a main part of FIG. 7, and FIGS. 9 to 11 relate to first to third modifications of the present embodiment. It is a fragmentary sectional view which shows the principal part of the stator of a rotary electric machine. In addition, the same code | symbol is attached | subjected to the same part as 1st and 2nd embodiment, description is abbreviate | omitted, and the structure of this embodiment different from 1st and 2nd embodiment is demonstrated.

図７及び図８において、高電圧で使用される発電機や電動機などの高電圧電気機器等である回転電機の固定子２５は、固定子鉄心１１に形成されたスロット１２内に、所定形状に整形された固定子コイル２６を挿入、固定するようにして構成されている。また固定子コイル２６は、コイル導体１４に絶縁テープを巻くことにより主絶縁層１５としている。そして、固定子コイル２６は、スロット１２内に挿入する直線部１６ａとスロット１２から延出した直線部１６ｂのスロット側部分の主絶縁層１５上に、低抵抗層を形成する低抵抗テープ２７が多重、例えば２重に巻かれた状態で、固定子鉄心１１のスロット１２内に挿入され、含浸樹脂等により一体化されている。   7 and 8, the stator 25 of the rotating electrical machine, which is a high-voltage electric device such as a generator or an electric motor used at a high voltage, has a predetermined shape in a slot 12 formed in the stator core 11. The shaped stator coil 26 is inserted and fixed. The stator coil 26 is formed as a main insulating layer 15 by winding an insulating tape around the coil conductor 14. The stator coil 26 includes a low resistance tape 27 that forms a low resistance layer on the main insulating layer 15 on the slot side portion of the linear portion 16a inserted into the slot 12 and the linear portion 16b extending from the slot 12. In a state of being wound in multiple, for example, double, it is inserted into the slot 12 of the stator core 11 and integrated with an impregnating resin or the like.

さらに、固定子コイル２６は、スロット１２から延出した低抵抗テープ２７の端部と、直線部１６ｂ上及びコイルエンドの湾曲部１６ｃ上の主絶縁層１５とに、電界緩和用半導電性テープ２２が巻かれ、それによって、低抵抗テープ２７の端縁部２８が主絶縁層１５表面に接する部分が覆われた状態になっている。このように半導電性テープ２２が巻かれることで、半導電性テープ２２が電界緩和層として機能し、また低抵抗テープ２７を多重に巻くと共に、半導電性テープ２２を低抵抗テープ２７の端縁部２８を覆うようにしてコイルエンドの湾曲部１６ｃにまで巻くことで、固定子コイル２６に高電圧が印加された際にも、第１の実施形態と同様に、固定子鉄心１１とコイル導体１４に挟まれた主絶縁層１５の表面での電界発生に伴うコロナ放電を抑制することができる。   Further, the stator coil 26 is provided on the end portion of the low-resistance tape 27 extending from the slot 12 and the main insulating layer 15 on the straight portion 16b and the curved portion 16c at the coil end. 22 is wound, so that the portion where the edge 28 of the low resistance tape 27 is in contact with the surface of the main insulating layer 15 is covered. By winding the semiconductive tape 22 in this way, the semiconductive tape 22 functions as an electric field relaxation layer, and the low resistance tape 27 is wound in multiple layers, and the semiconductive tape 22 is wound around the end of the low resistance tape 27. Even when a high voltage is applied to the stator coil 26 by winding the coil end to the curved portion 16c of the coil end so as to cover the edge portion 28, as in the first embodiment, the stator core 11 and the coil Corona discharge accompanying the generation of an electric field on the surface of the main insulating layer 15 sandwiched between the conductors 14 can be suppressed.

なお、本実施形態では、半導電性テープ２２を低抵抗テープ２７の端縁部２８を覆うように巻き、低抵抗テープ２７の端縁部２８と主絶縁層１５表面の接触部分を覆うようにしたが、図９乃至図１１に示す第１乃至第３変形形態のように構成してもよい。   In the present embodiment, the semiconductive tape 22 is wound so as to cover the end edge portion 28 of the low resistance tape 27, and the contact portion between the end edge portion 28 of the low resistance tape 27 and the surface of the main insulating layer 15 is covered. However, you may comprise like the 1st thru | or 3rd modification shown in FIG. 9 thru | or FIG.

すなわち、図９に示す第１変形形態は、固定子コイル２６ａは、スロット１２から延出した直線部１６ｂの主絶縁層１５の上に低抵抗テープ２７が、端縁部２８が階段状となるようにして２重に巻かれており、さらに、階段状となっている低抵抗テープ２７の端縁部２８を覆うように、半導電性テープ２２が巻かれている。これにより、低抵抗テープ２７の端縁部２８と主絶縁層１５表面の接触部分が覆われ、低抵抗テープ２７の端縁部２８の段差部分に形成された２つの段差により、上記実施形態の空隙２９よりも小さい２つの空隙２９ａ，２９ｂが形成される。   That is, in the first modification shown in FIG. 9, the stator coil 26 a has a low resistance tape 27 on the main insulating layer 15 of the straight portion 16 b extending from the slot 12, and the end portion 28 has a stepped shape. In this way, the semiconductive tape 22 is wound so as to cover the end edge portion 28 of the low resistance tape 27 having a stepped shape. Thereby, the contact portion between the edge 28 of the low-resistance tape 27 and the surface of the main insulating layer 15 is covered, and the two steps formed in the step of the edge 28 of the low-resistance tape 27 cause Two gaps 29a and 29b smaller than the gap 29 are formed.

その結果、上記実施形態の空隙２９よりも、空隙２９ａ，２９ｂによる不均一な電界の発生がし難いものとなり、より効果的にコロナ放電を抑制することができると共に、上記実施形態と同様の効果を得ることができる。   As a result, it is more difficult to generate a non-uniform electric field by the air gaps 29a and 29b than the air gap 29 of the above embodiment, and corona discharge can be suppressed more effectively, and the same effect as in the above embodiment. Can be obtained.

また、図１０に示す第２変形形態は、固定子コイル２６ｂは、スロット１２から延出した直線部１６ｂの主絶縁層１５の上に、２重に巻かれた低抵抗テープ２７と半導電性テープ２２とが、低抵抗テープ２７の端縁部２８が半導電性テープ２２上にくるように、すなわち、半導電性テープ２２の端部上に低抵抗テープ２７の端部が重なるように巻かれている。これにより、半導電性テープ２２の端縁部３０に形成された段差によって空隙３１が生じる。   Further, in the second modification shown in FIG. 10, the stator coil 26 b includes a low resistance tape 27 and a semiconductive layer which are wound twice on the main insulating layer 15 of the linear portion 16 b extending from the slot 12. The tape 22 is wound so that the end edge 28 of the low resistance tape 27 is on the semiconductive tape 22, that is, the end of the low resistance tape 27 overlaps the end of the semiconductive tape 22. It has been. As a result, a gap 31 is generated by the step formed on the end edge 30 of the semiconductive tape 22.

しかし、半導電性テープ２２の端縁部３０による空隙３１は小さく、２重の低抵抗テープ２７によって覆われることになる。その結果、上記実施形態よりも、空隙３１による不均一な電界の発生がし難いものとなり、より効果的にコロナ放電を抑制することができると共に、上記実施形態と同様の効果を得ることができる。   However, the gap 31 formed by the end edge 30 of the semiconductive tape 22 is small and is covered with the double low resistance tape 27. As a result, the non-uniform electric field due to the air gap 31 is less likely to be generated than in the above embodiment, so that corona discharge can be more effectively suppressed and the same effect as in the above embodiment can be obtained. .

さらに、図１１に示す第３変形形態は、固定子コイル２６ｃは、スロット１２から延出した直線部１６ｂの主絶縁層１５の上に、２重に巻かれた低抵抗テープ２７と半導電性テープ２２とが、互い違いに重なるように、すなわち、低抵抗テープ２７の２層となっている端縁部２８の層間に半導電性テープ２２の端部が挟み込まれるように巻かれている。これにより、低抵抗テープ２７の下層側の端縁部２８により形成される段差部分で空隙２９ａが生じ、半導電性テープ２２の端縁部３０に形成された段差によって空隙３１が生じる。   Further, in the third modified example shown in FIG. 11, the stator coil 26c has a low resistance tape 27 and a semiconductive layer which are wound twice on the main insulating layer 15 of the linear portion 16b extending from the slot 12. The tape 22 is wound so as to overlap with each other, that is, the end portion of the semiconductive tape 22 is sandwiched between the two end edge portions 28 of the low-resistance tape 27. As a result, a gap 29 a is generated at the step portion formed by the lower edge 28 of the low resistance tape 27, and a gap 31 is generated by the step formed at the edge 30 of the semiconductive tape 22.

しかし、低抵抗テープ２７の端縁部２８による空隙２９ａと、半導電性テープ２２の端縁部３０による空隙３１とは、上記実施形態におけるものよりも小さい。このため、上記実施形態よりも、空隙２９ａと空隙３１によって不均一な電界の発生がし難いものとなり、より効果的にコロナ放電を抑制することができると共に、上記実施形態と同様の効果を得ることができる。   However, the gap 29a due to the edge 28 of the low resistance tape 27 and the gap 31 due to the edge 30 of the semiconductive tape 22 are smaller than those in the above embodiment. For this reason, the non-uniform electric field is less likely to be generated by the air gap 29a and the air gap 31 than in the above embodiment, so that corona discharge can be suppressed more effectively and the same effect as in the above embodiment can be obtained. be able to.

本発明の第１の実施形態に係る回転電機の固定子の部分断面図である。It is a fragmentary sectional view of the stator of the rotary electric machine which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態に係る半導電性ワニスの構成を説明するための図である。It is a figure for demonstrating the structure of the semiconductive varnish which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態の変形形態に係る回転電機の固定子の部分断面図である。It is a fragmentary sectional view of the stator of the rotary electric machine which concerns on the modification of the 1st Embodiment of this invention. 本発明の第２の実施形態に係る回転電機の固定子の部分断面図である。It is a fragmentary sectional view of the stator of the rotary electric machine which concerns on the 2nd Embodiment of this invention. 本発明の第２の実施形態に係る半導電性テープを模式的に示す断面図である。It is sectional drawing which shows typically the semiconductive tape which concerns on the 2nd Embodiment of this invention. 本発明の第２の実施形態の変形形態に係る半導電性テープを模式的に示す断面図である。It is sectional drawing which shows typically the semiconductive tape which concerns on the modification of the 2nd Embodiment of this invention. 本発明の第３の実施形態に係る回転電機の固定子の部分断面図である。It is a fragmentary sectional view of the stator of the rotary electric machine which concerns on the 3rd Embodiment of this invention. 図７の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of FIG. 本発明の第３の実施形態の第１変形形態に係る回転電機の固定子の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the stator of the rotary electric machine which concerns on the 1st modification of the 3rd Embodiment of this invention. 本発明の第３の実施形態の第２変形形態に係る回転電機の固定子の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the stator of the rotary electric machine which concerns on the 2nd modification of the 3rd Embodiment of this invention. 本発明の第３の実施形態の第３変形形態に係る回転電機の固定子の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the stator of the rotary electric machine which concerns on the 3rd modification of the 3rd Embodiment of this invention. 従来技術を示す回転電機の固定子の部分断面図である。It is a fragmentary sectional view of the stator of the rotary electric machine which shows a prior art.

符号の説明Explanation of symbols

１１…固定子鉄心
１２…スロット
１３…固定子コイル
１４…コイル導体
１５…主絶縁層
１６ｂ…延出する直線部
１７…低抵抗テープ
１８…半導電性ワニス DESCRIPTION OF SYMBOLS 11 ... Stator iron core 12 ... Slot 13 ... Stator coil 14 ... Coil conductor 15 ... Main insulation layer 16b ... Extending linear part 17 ... Low resistance tape 18 ... Semiconductive varnish

Claims (10)

粒度メッシュが＃２４０以上（平均粒度８０μｍ以下）である複数種類の炭化珪素と四酸化三鉄のうちから選択された少なくとも２つの充填材と、ポリブタジエン樹脂、シリコーンワニスのいずれか一方の接着材とを、それぞれ所定の割合で混合して形成したことを特徴とする電界緩和用半導電性ワニス。   At least two fillers selected from a plurality of types of silicon carbide having a particle size mesh of # 240 or more (average particle size of 80 μm or less) and triiron tetroxide, and an adhesive of any one of a polybutadiene resin and a silicone varnish; Are mixed at a predetermined ratio to form a semiconductive varnish for electric field relaxation. 四酸化三鉄、粒度メッシュが＃２４０である炭化珪素、粒度メッシュが＃８００である炭化珪素、粒度メッシュが＃３０００である炭化珪素のうちの少なくとも２つでなる充填材と、ポリブタジエン樹脂、シリコーンワニスのいずれか一方の接着材とを、それぞれ所定の割合で混合して形成したことを特徴とする電界緩和用半導電性ワニス。   A filler composed of at least two of triiron tetroxide, silicon carbide having a particle size mesh of # 240, silicon carbide having a particle size mesh of # 800, silicon carbide having a particle size mesh of # 3000, polybutadiene resin, silicone A semiconductive varnish for electric field relaxation, characterized by being formed by mixing any one of the adhesives of the varnish at a predetermined ratio. 請求項１又は請求項２記載の電界緩和用半導電性ワニスをテープ基材に塗布、含浸して形成した半導電性ワニス層が、該テープ基材の片面又は両面に設けられていることを特徴とする電界緩和用半導電性テープ。   A semiconductive varnish layer formed by applying and impregnating a tape base material with the electric field relaxation semiconductive varnish according to claim 1 or 2 is provided on one or both sides of the tape base material. A semiconductive tape for electric field relaxation. 前記テープ基材が、ガラスクロスであることを特徴とする請求項３記載の電界緩和用半導電性テープ。   The semiconductive tape for electric field relaxation according to claim 3, wherein the tape base material is a glass cloth. 前記テープ基材が、ガラス繊維と有機繊維とを混紡した織布又は不織布であることを特徴とする請求項３記載の電界緩和用半導電性テープ。   The semiconductive tape for electric field relaxation according to claim 3, wherein the tape base material is a woven fabric or a non-woven fabric obtained by mixing glass fibers and organic fibers. 請求項１又は請求項２記載の電界緩和用半導電性ワニスを有機材料フィルムに塗布して形成した半導電性ワニス層が、該有機材料フィルムの片面又は両面に設けられていることを特徴とする電界緩和用半導電性テープ。   A semiconductive varnish layer formed by applying the electric field relaxation semiconductive varnish according to claim 1 or 2 to an organic material film is provided on one side or both sides of the organic material film. Semi-conductive tape for electric field relaxation. 固定子鉄心の所定スロット内に、導体部に絶縁テープを巻回して形成した主絶縁層を有すると共に、前記スロットに挿入する直線部分と該スロットから延出する直線部分のスロット側部分の前記主絶縁層上に低抵抗テープを巻回して形成した低抵抗層を備え、所定形状に整形された固定子コイルを納めて形成した回転電機の固定子であって、
前記固定子コイルは、延出する前記直線部分の前記低抵抗層の端部分から延出する前記直線部分の主絶縁層にかけての表面に、又は延出する前記直線部分及び該固定子コイルのコイルエンドの主絶縁層にかけての表面に、上記請求項１又は請求項２記載の電界緩和用半導電性ワニスが塗布されていることを特徴とする回転電機の固定子。 A main insulating layer formed by winding an insulating tape around a conductor portion in a predetermined slot of the stator core, and the main portion of the straight portion inserted into the slot and the slot side portion of the straight portion extending from the slot. A stator of a rotating electrical machine comprising a low-resistance layer formed by winding a low-resistance tape on an insulating layer and containing a stator coil shaped into a predetermined shape,
The stator coil is formed on the surface of the linear portion extending from the end portion of the low resistance layer to the main insulating layer, or the linear portion extending and the coil of the stator coil. A stator for a rotating electrical machine, wherein the surface of the end facing the main insulating layer is coated with the semiconductive varnish for electric field relaxation according to claim 1 or 2. 固定子鉄心の所定スロット内に、導体部に絶縁テープを巻回して形成した主絶縁層を有すると共に、前記スロットに挿入する直線部分と該スロットから延出する直線部分のスロット側部分の前記主絶縁層上に低抵抗テープを巻回して形成した低抵抗層を備え、所定形状に整形された固定子コイルを納めて形成した回転電機の固定子であって、
前記固定子コイルは、延出する前記直線部分の前記低抵抗層の端部分から延出する前記直線部分の主絶縁層にかけての表面に、又は延出する前記直線部分及び該固定子コイルのコイルエンドの主絶縁層にかけての表面に、上記請求項３又は請求項６記載の電界緩和用半導電性テープが設けられていることを特徴とする回転電機の固定子。 A main insulating layer formed by winding an insulating tape around a conductor portion in a predetermined slot of the stator core, and the main portion of the straight portion inserted into the slot and the slot side portion of the straight portion extending from the slot. A stator of a rotating electrical machine comprising a low-resistance layer formed by winding a low-resistance tape on an insulating layer and containing a stator coil shaped into a predetermined shape,
The stator coil is formed on the surface of the linear portion extending from the end portion of the low resistance layer to the main insulating layer, or the linear portion extending and the coil of the stator coil. A stator for a rotating electrical machine, wherein the electric field relaxation semiconductive tape according to claim 3 or 6 is provided on a surface of the end facing the main insulating layer. 前記低抵抗層が、前記低抵抗テープによる多重層構造であると共に、該低抵抗層の端部が階段状に形成され、階段状の該端部を覆うように前記電界緩和用半導電性ワニス又は前記電界緩和用半導電性テープが設けられていることを特徴とする請求項７又は請求項８記載の回転電機の固定子。   The low-resistance layer has a multi-layer structure of the low-resistance tape, and an end portion of the low-resistance layer is formed in a stepped shape, and the semiconductive varnish for electric field relaxation is formed so as to cover the step-shaped end portion. The stator of a rotating electrical machine according to claim 7 or 8, wherein the electric field relaxation semiconductive tape is provided. 前記低抵抗層が、前記低抵抗テープによる多重層構造であると共に、前記電界緩和用半導電性ワニス又は前記電界緩和用半導電性テープの端部が、前記低抵抗テープの下側、または前記低抵抗テープの層間に入り込むように設けられていることを特徴とする請求項９記載の回転電機の固定子。   The low-resistance layer has a multi-layer structure of the low-resistance tape, and an end portion of the electric field relaxation semiconductive varnish or the electric field relaxation semiconductive tape is below the low resistance tape, or The stator for a rotating electrical machine according to claim 9, wherein the stator is provided so as to enter between layers of a low-resistance tape.
JP2008185638A 2008-07-17 2008-07-17 Half-conductive varnish for electric field relaxation, tape, and stator of rotating electrical machine Pending JP2010028943A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013162570A (en) * 2012-02-02 2013-08-19 Sumitomo Electric Ind Ltd Stator and segment coil
CN104040841A (en) * 2012-01-10 2014-09-10 福伊特专利公司 Corona Shield
US9293957B2 (en) 2011-10-27 2016-03-22 Toyota Jidosha Kabushiki Kaisha Segment coil, method of manufacturing segment coil, and stator including segment coil
JP2016512009A (en) * 2013-01-15 2016-04-21 シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ Method and apparatus for forming a corona shield
US9755469B2 (en) 2011-10-27 2017-09-05 Toyota Jidosha Kabushiki Kaisha Segment coil, stator including segment coil, and method of manufacturing segment coil
TWI780795B (en) * 2021-06-01 2022-10-11 日商三菱電機股份有限公司 Stator core of rotating electric machine, stator of rotating electric machine, rotating electric machine, manufacturing method of stator core of rotating electric machine, and manufacturing method of rotating electric machine
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

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105903A (en) * 1980-12-20 1982-07-01 Tokyo Shibaura Electric Co Electric field relaxing material
JPS60170434A (en) * 1984-02-14 1985-09-03 Toshiba Corp Winding for electric machine and manufacture thereof
JPS6166539A (en) * 1984-09-07 1986-04-05 Toshiba Corp Stator coil
JPS6192140A (en) * 1984-10-09 1986-05-10 Toshiba Corp Corona shielding method of electric machine winding
JPS6277040A (en) * 1985-09-30 1987-04-09 Toshiba Corp Manufacture of insulated coil
JPH11262210A (en) * 1998-03-12 1999-09-24 Toshiba Corp Stator coil of dynamoelectric machine
JP2001037163A (en) * 1999-07-14 2001-02-09 Bridgestone Corp Brushes for motor and motor provided with them
JP2004297916A (en) * 2003-03-27 2004-10-21 Mitsubishi Electric Corp Stator coil of rotating electric machine
JP2005110450A (en) * 2003-10-01 2005-04-21 Toshiba Corp Low-resistance corona-prevention tape or sheet, and stator coil for rotary electric machine
JP2007014149A (en) * 2005-06-30 2007-01-18 Toshiba Corp Electric field relaxing tape and stator coil in dynamo-electric machine
JP2007282410A (en) * 2006-04-10 2007-10-25 Toshiba Corp Rotating electric machine, stator coil thereof, its manufacturing method, and semiconductive sheet, semiconductive tape

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105903A (en) * 1980-12-20 1982-07-01 Tokyo Shibaura Electric Co Electric field relaxing material
JPS60170434A (en) * 1984-02-14 1985-09-03 Toshiba Corp Winding for electric machine and manufacture thereof
JPS6166539A (en) * 1984-09-07 1986-04-05 Toshiba Corp Stator coil
JPS6192140A (en) * 1984-10-09 1986-05-10 Toshiba Corp Corona shielding method of electric machine winding
JPS6277040A (en) * 1985-09-30 1987-04-09 Toshiba Corp Manufacture of insulated coil
JPH11262210A (en) * 1998-03-12 1999-09-24 Toshiba Corp Stator coil of dynamoelectric machine
JP2001037163A (en) * 1999-07-14 2001-02-09 Bridgestone Corp Brushes for motor and motor provided with them
JP2004297916A (en) * 2003-03-27 2004-10-21 Mitsubishi Electric Corp Stator coil of rotating electric machine
JP2005110450A (en) * 2003-10-01 2005-04-21 Toshiba Corp Low-resistance corona-prevention tape or sheet, and stator coil for rotary electric machine
JP2007014149A (en) * 2005-06-30 2007-01-18 Toshiba Corp Electric field relaxing tape and stator coil in dynamo-electric machine
JP2007282410A (en) * 2006-04-10 2007-10-25 Toshiba Corp Rotating electric machine, stator coil thereof, its manufacturing method, and semiconductive sheet, semiconductive tape

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9293957B2 (en) 2011-10-27 2016-03-22 Toyota Jidosha Kabushiki Kaisha Segment coil, method of manufacturing segment coil, and stator including segment coil
US9755469B2 (en) 2011-10-27 2017-09-05 Toyota Jidosha Kabushiki Kaisha Segment coil, stator including segment coil, and method of manufacturing segment coil
CN104040841A (en) * 2012-01-10 2014-09-10 福伊特专利公司 Corona Shield
JP2013162570A (en) * 2012-02-02 2013-08-19 Sumitomo Electric Ind Ltd Stator and segment coil
JP2016512009A (en) * 2013-01-15 2016-04-21 シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ Method and apparatus for forming a corona shield
US9843246B2 (en) 2013-01-15 2017-12-12 Siemens Aktiengesellschaft Method and apparatus for forming corona shielding
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
TWI780795B (en) * 2021-06-01 2022-10-11 日商三菱電機股份有限公司 Stator core of rotating electric machine, stator of rotating electric machine, rotating electric machine, manufacturing method of stator core of rotating electric machine, and manufacturing method of rotating electric machine

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