JP3301237B2 - Composition for insulating stator coil of rotating electric machine and insulation treatment method - Google Patents
Composition for insulating stator coil of rotating electric machine and insulation treatment methodInfo
- Publication number
- JP3301237B2 JP3301237B2 JP25969294A JP25969294A JP3301237B2 JP 3301237 B2 JP3301237 B2 JP 3301237B2 JP 25969294 A JP25969294 A JP 25969294A JP 25969294 A JP25969294 A JP 25969294A JP 3301237 B2 JP3301237 B2 JP 3301237B2
- Authority
- JP
- Japan
- Prior art keywords
- epoxy resin
- insulating
- curing accelerator
- composition
- curing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は高圧回転電機の固定子コ
イルの絶縁用組成物と絶縁処理方法に関し、特にコイル
ワイヤの外周にマイカテープを巻回して主絶縁層を形成
し、その外周に外層テープを巻回して巻線体として、エ
ポキシ樹脂と、酸無水物系硬化剤と、溶解型硬化促進剤
と、熱溶融型固形硬化促進剤とから成るエポキシ樹脂組
成物を真空含浸し、加熱硬化させることにより、外皮部
を先に硬化させ、内部に含浸した樹脂の流出を防止する
絶縁用組成物と、絶縁用組成物を使用する絶縁処理方法
に関し、またエポキシ樹脂組成物の硬化反応を遅くする
ことによりポットライフを延長する絶縁用組成物と絶縁
処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating composition and an insulating method for a stator coil of a high-voltage rotating electric machine, and more particularly to a method of forming a main insulating layer by winding a mica tape around an outer periphery of a coil wire. The outer layer tape is wound as a winding body, and vacuum-impregnated with an epoxy resin composition comprising an epoxy resin, an acid anhydride-based curing agent, a solution-type curing accelerator, and a hot-melt-type solid curing accelerator, and heated. By curing, the outer skin portion is cured first, and an insulating composition for preventing the resin impregnated therein from flowing out, and an insulating treatment method using the insulating composition, and the curing reaction of the epoxy resin composition. The present invention relates to an insulating composition and an insulating treatment method for extending a pot life by slowing down.
【０００２】[0002]
【従来の技術】高圧回転電機の固定子コイル（以下コイ
ルと称する）の絶縁方法としては、一般的に、コイルに
マイカテープを巻回し、エポキシ樹脂組成物を真空加圧
含浸して加熱硬化する方法が用いられている。この方法
においては、エポキシ樹脂組成物（以下樹脂とも称す
る）を含浸してから加熱硬化するまでの加熱工程で樹脂
の温度特性によって粘度が低下し、絶縁層に含浸されて
いた樹脂が硬化する前に流れ出し、絶縁層内にボイドを
形成して絶縁性能を低下させるという問題があった。コ
イルに含浸した樹脂の流れ出しを防止する方法として、
樹脂に硬化促進剤を多量に配合して、硬化時間を早め、
樹脂の粘度が低下している時間を短縮する方法が従来か
ら用いられていたが、この方法では配合済みのエポキシ
樹脂組成物のポットライフが短かくなる欠点があった。2. Description of the Related Art As a method of insulating a stator coil (hereinafter referred to as a coil) of a high-voltage rotating electric machine, generally, a mica tape is wound around the coil, and an epoxy resin composition is impregnated in vacuum and heat-cured. A method is used. In this method, the viscosity decreases due to the temperature characteristics of the resin in a heating step from impregnation of the epoxy resin composition (hereinafter also referred to as resin) to heating and curing, so that the resin impregnated in the insulating layer is cured. At the same time, voids are formed in the insulating layer, and the insulating performance is degraded. As a method to prevent the resin impregnated in the coil from flowing out,
Incorporating a large amount of a curing accelerator into the resin to shorten the curing time,
Conventionally, a method of shortening the time during which the viscosity of the resin has been reduced has been used, but this method has a drawback that the pot life of the epoxy resin composition that has been blended becomes short.
【０００３】また特開昭５０−５８５０１号公報のよう
に、硬化促進剤を溶かした液にコイルを浸漬し、乾燥し
た後に硬化促進剤を含まない樹脂に含浸し、硬化させる
方法、および、特開平２−１７８４０号公報のように硬
化促進剤を塗布含浸した主絶縁テープを巻回する方法な
どが開示されている。さらには、実開平５−６７１７９
号公報のように、主絶縁テープの外側に織り目の細かい
目止めテープを巻回する方法などが考えられている。前
記の特開昭５０−５８５０１号公報や特開平２−１７８
４０号公報においては、コイルとエポキシ成分と酸無水
物成分とから成るエポキシ樹脂組成物を含浸して加熱硬
化すると、主絶縁テープに付着している硬化促進剤の作
用によって硬化が開始され、樹脂が流れ出すのを防止
し、絶縁層内に絶縁性能を低下させるボイドの発生を防
止できる。一方、実開平５−６７１７９号公報は樹脂が
流れ出す出口を狭くする方法である。Further, as disclosed in Japanese Patent Application Laid-Open No. 50-58501, a method of immersing a coil in a liquid in which a curing accelerator is dissolved, drying the coil, impregnating it with a resin containing no curing accelerator, and curing the resin. A method of winding a main insulating tape coated and impregnated with a hardening accelerator as disclosed in Japanese Unexamined Patent Publication No. 2-17840 is disclosed. Furthermore, Japanese Utility Model Application Hei 5-67179
As disclosed in Japanese Unexamined Patent Application Publication No. H11-260, a method of winding a finely-sealed sealing tape outside the main insulating tape has been considered. JP-A-50-58501 and JP-A-2-178 mentioned above.
In Japanese Patent No. 40, when an epoxy resin composition comprising a coil, an epoxy component, and an acid anhydride component is impregnated and cured by heating, the curing is started by the action of a curing accelerator attached to the main insulating tape, and the resin is cured. Can be prevented from flowing out, and the occurrence of voids in the insulating layer, which lowers the insulating performance, can be prevented. On the other hand, Japanese Utility Model Laid-Open No. 5-67179 discloses a method of narrowing an outlet from which a resin flows.
【０００４】[0004]
【発明が解決しようとする課題】上記の方法には次のよ
うな欠点が認められる。 １）硬化促進剤を多く配合する方法では、エポキシ樹脂
組成物のポットライフが短くなる欠点がある。 ２）硬化促進剤入りの溶液に浸漬した後で乾燥する方法
は、製造工程が２工程になり、製造コストを上昇させる
原因になるのに加え、溶剤を使用するので職場の安全衛
生上の点からの問題がある。 ３）硬化促進剤をマイカ層の表面に塗布する方法は、皮
膚カブレ性の高い硬化促進剤を取り扱うので、安全衛生
上の問題と、硬化促進剤が塗布されていないスロット絶
縁部などで樹脂が硬化しないという欠点がある。The above-mentioned method has the following disadvantages. 1) The method of adding a large amount of a curing accelerator has a disadvantage that the pot life of the epoxy resin composition is shortened. 2) The method of drying after immersion in a solution containing a curing accelerator involves two manufacturing steps, causing an increase in manufacturing cost, and in addition to using a solvent, it is a safety and health point of workplace. There is a problem from. 3) The method of applying a hardening accelerator to the surface of the mica layer uses a hardening accelerator having high skin rash. There is a disadvantage that it does not cure.
【０００５】[0005]
【課題を解決するための手段】本発明では、従来技術で
の上記の課題を解決し、樹脂の流れ出しを防止しかつポ
ットライフを長くするという２つの目的を達成するた
め、次に示す手段を採用した。 １）コイルに樹脂を含浸し、加熱硬化させる過程で樹脂
が流れ出すのを防止し、ボイドなどの欠陥を含まないコ
イルの絶縁層を得ることを目的とする。この目的を達成
するため、固形（粒子状）の硬化促進剤を添加し、外層
テープのろ過効果を利用し、コイル含浸時に固形の硬化
促進剤が外層テープに集まるようにした。例えば、従来
ビスフェノールＡ型エポキシ樹脂と無水メチルハイミッ
ク酸硬化剤とを主成分とする混合物において、前記のエ
ポキシ樹脂１００重量部に対し、０．２〜０．５重量部
添加されていた溶解型硬化促進剤１-シアノエチル-２-
エチル-４-メチルイミダゾールを、ほぼ半量とし、代わ
りに固形の熱溶融型硬化促進剤（以下単に熱溶融型硬化
促進剤と称することもある）としてのＢＦ3-モノエチル
アミンあるいはマイクロカプセル型硬化促進剤（商品
名：ノバキュアーＨＸ-３４７１）を０．２〜１．０重
量部添加するようにした。前記のエポキシ樹脂１００重
量部に対し、溶解型硬化促進剤としての１-シアノエチ
ル-２-エチル-４-メチルイミダゾールの量が０．１重量
部を下回る場合は、エポキシ樹脂の硬化の促進が不十分
となり、０．５重量部を越える場合は、ポットライフが
短くなる。好適には、この溶解型促進剤は０．１〜０．
２重量部とすべきである。一方、熱溶融型硬化促進剤と
してのＢＦ3-モノエチルアミンあるいはマイクロカプセ
ル型硬化促進剤が０．１重量部を下回る場合は添加の効
果がなく、１．０重量部を越えても効果は向上されな
い。According to the present invention, in order to solve the above-mentioned problems in the prior art and to achieve the two objects of preventing the resin from flowing out and extending the pot life, the following means are provided. Adopted. 1) An object of the present invention is to prevent a resin from flowing out in a process of impregnating a coil with a resin and heating and curing the resin, and to obtain an insulating layer of the coil which is free from defects such as voids. To achieve this object, a solid (particulate) hardening accelerator was added, and the filtering effect of the outer layer tape was used so that the solid hardening accelerator gathered on the outer layer tape during coil impregnation. For example, in a conventional mixture containing a bisphenol A type epoxy resin and a methylhymic acid anhydride curing agent as the main components, 0.2 to 0.5 parts by weight was added to 100 parts by weight of the epoxy resin. Curing accelerator 1-cyanoethyl-2-
Ethyl-4-methylimidazole is almost half the amount, and instead BF 3 -monoethylamine or microcapsule-type curing accelerator as a solid hot-melt curing accelerator (hereinafter sometimes simply referred to as “hot-melt curing accelerator”) An agent (trade name: NOVACURE HX-3471) was added in an amount of 0.2 to 1.0 part by weight. If the amount of 1-cyanoethyl-2-ethyl-4-methylimidazole as a solution-type curing accelerator is less than 0.1 part by weight with respect to 100 parts by weight of the epoxy resin, acceleration of the curing of the epoxy resin is not achieved. If it is sufficient and exceeds 0.5 parts by weight, the pot life becomes short. Preferably, the dissolution promoter is 0.1-0.5.
Should be 2 parts by weight. On the other hand, if the amount of BF 3 -monoethylamine or the microcapsule-type curing accelerator as the hot-melt type curing accelerator is less than 0.1 part by weight, there is no effect of addition, and the effect is improved even if it exceeds 1.0 part by weight. Not done.
【０００６】好適には、固形の熱溶融型硬化促進剤は、
０．２〜０．８重量部とすべきである。エポキシ樹脂の
主成分と、溶解型硬化促進剤と熱溶融型硬化促進剤とが
所定の割合で配合された組成物に、粘度を低下させて含
浸性を向上させる目的で、反応性の希釈剤を用いた。ガ
ラス繊維やテトロン繊維で織られたテープのクロス目を
通過しない固形の熱溶融型硬化促進剤の粒子の大きさ
は、２μｍ好適には５μｍよりも大きければよい。たと
え、小さな径の硬化促進剤が混入していて外層テープを
通過し主絶縁層に侵入したとしても、含浸されたエポキ
シ樹脂組成物の硬化を早めるだけなので実害はない。し
かし、粒子径が２０μｍ以上になると、エポキシ樹脂組
成物への分散が不均一になり、皮膜硬化性が不均一にな
ると共に貯蔵タンクの底部に沈降する恐れもあるので、
粒子径は２μｍより大きく、好適には５μｍよりも大き
く２０μｍ以下とすべきである。 ２）エポキシ樹脂のポットライフを長くする。この目的
を達成するためには、溶解型硬化促進剤の配合量を従来
の半分にし、貯蔵中のエポキシ樹脂組成物の硬化反応を
遅らせることによりポットライフを延長することができ
る。[0006] Preferably, the solid hot-melt curing accelerator is
It should be 0.2-0.8 parts by weight. In order to reduce the viscosity and improve the impregnation property of the composition in which the main component of the epoxy resin, the melt-type curing accelerator and the hot-melt type curing accelerator are blended in a predetermined ratio, a reactive diluent is used. Was used. The particle size of the solid hot-melt curing accelerator which does not pass through the cross of the tape woven of glass fiber or tetron fiber may be larger than 2 μm, preferably larger than 5 μm. Even if a curing accelerator having a small diameter is mixed and passes through the outer layer tape and penetrates into the main insulating layer, there is no actual harm because it only accelerates the curing of the impregnated epoxy resin composition. However, when the particle size is 20 μm or more, the dispersion in the epoxy resin composition becomes non-uniform, the curability of the film becomes non-uniform, and there is a possibility of settling at the bottom of the storage tank.
The particle size should be greater than 2 μm, preferably greater than 5 μm and not more than 20 μm. 2) Extend the pot life of the epoxy resin. In order to achieve this object, the pot life can be extended by halving the amount of the solution-type curing accelerator and delaying the curing reaction of the epoxy resin composition during storage.
【０００７】[0007]
【作用】外層テープのクロス目を通過しない粒径の固形
の硬化促進剤、すなわち熱溶融型硬化促進剤を添加した
上記のエポキシ樹脂組成物は、含浸の際に固形の硬化促
進剤が外層テープのろ過効果によりクロス目周辺に留ま
り富化されるため、外周部のエポキシ樹脂組成物が急速
に硬化して、硬化過程で内部のエポキシ樹脂組成物の流
れ出しが少なくなり、絶縁層内のボイドが少なくなる。
この結果、部分放電の発生が防止され絶縁層が劣化しな
いためコイルの寿命を長くすることができる。また、溶
解型硬化促進剤の配合量を半分に減らすことにより、貯
蔵中のエポキシ組成物の硬化反応が遅くなり、ポットラ
イフを延長することができる。The above-mentioned epoxy resin composition to which a solid curing accelerator having a particle size that does not pass through the cross of the outer layer tape, that is, a hot-melt type curing accelerator is added. Due to the filtration effect of the material, the epoxy resin composition at the outer periphery is hardened rapidly because it stays around the cross eyes and is enriched.During the curing process, the flow of the epoxy resin composition inside is reduced, and voids in the insulating layer are reduced. Less.
As a result, the occurrence of partial discharge is prevented and the insulating layer does not deteriorate, so that the life of the coil can be extended. In addition, by reducing the blending amount of the solution-type curing accelerator by half, the curing reaction of the epoxy composition during storage becomes slow, and the pot life can be extended.
【０００８】[0008]
【実施例】図１は本発明の実施例の対象とされる高圧回
転電機のコイルを示すもので、コイルワイヤ１の外周に
主絶縁層２としてマイカテープを巻き回し、次にその外
周にテトロンテープやガラステープなどの外層テープ３
を巻き回したコイルを所定の数だけ準備した。これらの
コイルを、下記に示した実施例のエポキシ樹脂組成物
と、比較例として示した従来のエポキシ組成物に真空加
圧含浸し、その後加熱硬化を行った。本発明の実施例に
よる絶縁層内のボイドと、従来のエポキシ樹脂組成物に
よる絶縁層内のボイドの多少を比較する目的で、それぞ
れの誘電正接−電圧特性を測定し図２に示す結果を得
た。また同じエポキシ樹脂組成物を１０日以上貯蔵し、
経時的にそれぞれのエポキシ樹脂組成物の粘度を測定し
て図３に示す結果を得た。FIG. 1 shows a coil of a high-voltage rotating electric machine to which an embodiment of the present invention is applied. A mica tape is wound around a coil wire 1 as a main insulating layer 2 and then a tetron is wound around the coil wire 1. Outer layer tape 3 such as tape or glass tape
Was prepared in a predetermined number. These coils were impregnated with the epoxy resin compositions of the examples shown below and the conventional epoxy compositions shown as comparative examples under vacuum pressure, and then heat-cured. In order to compare the voids in the insulating layer according to the embodiment of the present invention with the voids in the insulating layer formed by the conventional epoxy resin composition, the respective dielectric loss tangent-voltage characteristics were measured and the results shown in FIG. 2 were obtained. Was. Also, store the same epoxy resin composition for 10 days or more,
The viscosity of each epoxy resin composition was measured over time to obtain the results shown in FIG.
【０００９】実施例 ビスフェノールＡ型エポキシ樹脂 １００重量部 無水メチルハイミック酸硬化剤 １１５重量部 ブタンジオール ジグリシジルエーテル ３０重量部 （希釈剤） １-シアノエチル-２-エチル-４-メチルイミダゾール ０．１重量部 （溶解型硬化促進剤） ＢＦ3-モノエチルアミン（粒子径 ２〜２０μｍ） ０．５重量部 （熱溶融型硬化促進剤） または、マイクロカプセル型硬化促進剤（粒子径 ５μｍ）０．５重量部 （商品名：ノバキュアーＨＸ-３４７１）比較例 ビスフェノールＡ型エポキシ樹脂 １００重量部 無水メチルハイミック酸 １１５重量部 （硬化剤） ブタンジオール ジグリシジルエーテル ３０重量部 （希釈剤） １-シアノエチル-２-エチル-４-メチルイミダゾール （溶解型硬化促進剤） ０．２重量部 図２の結果から、１-シアノエチル-２-エチル-４-メチ
ルイミダゾールとして比較例の０．２重量部を半分に少
なくし、ＢＦ3-モノエチル アミンを０．５重量部添加
した本発明のエポキシ樹脂組成物による実施例は、誘電
正接−電圧特性も比較例より良好であった。また、図３
に示すように、実施例のエポキシ樹脂組成物は、貯蔵時
の粘度増加が比較例に比べて小さい（遅い）ためポット
ライフも延長される。 Examples Bisphenol A type epoxy resin 100 parts by weight Methylhymic anhydride curing agent 115 parts by weight Butanediol diglycidyl ether 30 parts by weight (diluent) 1-cyanoethyl-2-ethyl-4-methylimidazole 0.1 Parts by weight (dissolution type curing accelerator) BF 3 -monoethylamine (particle size: 2 to 20 μm) 0.5 parts by weight (hot-melt type curing accelerator) or microcapsule type curing accelerator (particle size: 5 μm) 0.5 Parts by weight (trade name: Novacure HX-3471) Comparative Example Bisphenol A epoxy resin 100 parts by weight Methylhymic anhydride 115 parts by weight (curing agent) Butanediol diglycidyl ether 30 parts by weight (diluent) 1-cyanoethyl-2 -Ethyl-4-methylimidazole (Soluble curing accelerator) 0.2 parts by weight From the results in Fig. 2 Reduced by half and 0.2 parts by weight of the comparative example as 1-cyanoethyl-2-ethyl-4-methylimidazole, BF 3 - Example according to the epoxy resin composition of the present invention monoethyl amine were added 0.5 part by weight Also, the dielectric loss tangent-voltage characteristic was better than the comparative example. FIG.
As shown in (1), the epoxy resin compositions of Examples have a small (slow) increase in viscosity during storage compared to Comparative Examples, and thus the pot life is prolonged.
【００１０】本発明で使用している溶解型硬化促進剤
は、液状のイミダゾールとは限らず第三級アミンであっ
てよいし、また、エポキシ成分や酸無水物に溶解するも
のであれば固形のものであってもよい。熱溶融型硬化促
進剤は固形のイミダゾールでもよく、また液状の第三級
アミンやイミダゾールを熱溶融性の皮膜でマイクロカプ
セル化したものでもよい。図４を参照すると、コイルの
主絶縁層２にエポキシ組成物が含浸してゆく際に、固形
の熱溶融型硬化促進剤４は外層テープ３のクロス目３ｂ
によって目詰りをおこし（トラップされて）、コイル表
面側に集まってくる。この結果、コイル表面は、熱溶融
型硬化促進剤の含有率が大きくなり、加熱硬化させる際
にはコイル内部よりも早く硬化し、コイル内部に含浸さ
れているエポキシ樹脂組成物が外部へ流れ出る出口をふ
さいでしまう。ガラス繊維やテトロン繊維で織られたテ
ープのクロス目を通過しない固形の硬化促進剤の粒子の
大きさは、５μｍよりも大きければよい。The dissolution-type curing accelerator used in the present invention is not limited to liquid imidazole but may be a tertiary amine, and may be a solid amine as long as it can be dissolved in an epoxy component or an acid anhydride. It may be. The hot-melt curing accelerator may be solid imidazole, or a liquid tertiary amine or imidazole microencapsulated with a hot-melt coating. Referring to FIG. 4, when the main insulating layer 2 of the coil is impregnated with the epoxy composition, the solid hot-melt type hardening accelerator 4 becomes crossed with the cross-layer 3b of the outer layer tape 3.
Causes clogging (trapping) and collects on the coil surface side. As a result, the coil surface has a higher content of the hot-melt type curing accelerator, and when heated and cured, it cures faster than the inside of the coil, and the outlet through which the epoxy resin composition impregnated inside the coil flows out. Will be blocked. The size of the solid hardening accelerator particles that do not pass through the cross of the tape woven of glass fiber or tetron fiber may be larger than 5 μm.
【００１１】たとえ、小さな粒径の硬化促進剤が混入し
ていて外層テープを通過し主絶縁層に侵入したとして
も、含浸されたエポキシ組成物の硬化を早めるだけなの
で実害はない。なお、粒子径が２０μｍ以上になると、
エポキシ樹脂組成物への分散が不均一になり、皮膜硬化
性が不均一になると共に貯蔵タンクの底部に沈降する恐
れもある。さらに、この固形の熱溶融型硬化促進剤は、
エポキシ組成物の貯蔵温度では、硬化反応への促進作用
がないのでポットライフへの影響はない。Even if a hardening accelerator having a small particle size is mixed in and penetrates the outer insulating tape and penetrates into the main insulating layer, it does not cause any harm because it only accelerates the hardening of the impregnated epoxy composition. When the particle diameter is 20 μm or more,
The dispersion in the epoxy resin composition becomes non-uniform, the curability of the film becomes non-uniform, and there is a possibility that it may settle at the bottom of the storage tank. Furthermore, this solid hot-melt curing accelerator is
At the storage temperature of the epoxy composition, there is no effect on the pot life since there is no accelerating effect on the curing reaction.
【００１２】[0012]
１．本発明によるエポキシ樹脂組成物が含浸されたコイ
ルは、外周部のエポキシ樹脂組成物が急速に硬化するの
で、硬化過程で内部のエポキシ樹脂組成物の流れ出しが
少なくなり、絶縁層内のボイドが少なくなる。この結
果、部分放電の発生が防止され絶縁層が劣化しなくなる
のでコイルの寿命を長くすることができる。 ２．溶解型硬化促進剤の配合量を半分に減らしたので、
貯蔵中のエポキシ組成物の硬化反応が遅くなり、ポット
ライフを１．４倍に延長することができた。1. In the coil impregnated with the epoxy resin composition according to the present invention, the epoxy resin composition in the outer peripheral portion is rapidly cured, so that the flow of the epoxy resin composition inside in the curing process is reduced, and the voids in the insulating layer are reduced. Become. As a result, the occurrence of partial discharge is prevented and the insulating layer does not deteriorate, so that the life of the coil can be extended. 2. As the blending amount of the dissolution type curing accelerator has been reduced by half,
The curing reaction of the epoxy composition during storage became slow, and the pot life could be extended to 1.4 times.
【図１】本発明と従来技術の対象とされる高圧回転電機
のコイルを示す断面図である。FIG. 1 is a cross-sectional view showing a coil of a high-voltage rotating electric machine to which the present invention and the prior art are applied.
【図２】本発明の実施例と、従来技術による比較例のエ
ポキシ樹脂組成物により絶縁処理された絶縁層内のボイ
ドを示す誘電正接−電圧特性を示すグラフである。FIG. 2 is a graph showing a dielectric loss tangent-voltage characteristic showing a void in an insulating layer insulated by an epoxy resin composition of an example of the present invention and a comparative example according to the prior art.
【図３】本発明の実施例と、比較例のエポキシ樹脂組成
物の貯蔵中の粘度変化を示すグラフである。FIG. 3 is a graph showing a change in viscosity during storage of the epoxy resin compositions of Examples of the present invention and Comparative Examples.
【図４】図１のＡ部の拡大断面図であり、コイルの主絶
縁層へエポキシ樹脂組成物が含浸していく際、固形の熱
溶融型硬化促進剤がコイル表面に集まり、エポキシ組成
物が外部へ流出する出口をふさぐ状態を示す模式図であ
る。FIG. 4 is an enlarged cross-sectional view of a portion A in FIG. 1; when a main insulating layer of the coil is impregnated with the epoxy resin composition, a solid hot-melt type curing accelerator gathers on the coil surface to form an epoxy composition; FIG. 4 is a schematic diagram showing a state in which an outlet that flows out to the outside is blocked.
１ コイルワイヤ ２ 主絶縁層 ３ 外層テープ ３ｂ 外層テープのクロス目 ４ トラップされた熱溶融型硬化促進剤 REFERENCE SIGNS LIST 1 coil wire 2 main insulating layer 3 outer layer tape 3 b cross layer of outer layer tape 4 trapped hot-melt curing accelerator
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 15/12 H02K 3/34 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) H02K 15/12 H02K 3/34
Claims (4)
回し形成された主絶縁層の外周に、さらに外層テープを
巻回し形成された巻線体に、真空加圧含浸されるエポキ
シ樹脂組成物としてエポキシ樹脂成分と、酸無水物硬化
剤成分と、硬化促進剤とを含んで成る固定子コイルの絶
縁用のエポキシ樹脂組成物において； 前記硬化促進剤がエポキシ樹脂や酸無水物に溶解する溶
解型硬化促進剤と、エポキシ樹脂や酸無水物に不溶で、
かつ、前記外層テープのクロス目を通過しない粒子径の
固形の熱溶融型硬化促進剤とを併用することを特徴とす
る回転電機の固定子コイルの絶縁用組成物。1. An epoxy resin composition which is impregnated with a mica tape around an outer periphery of a coil wire and a main insulating layer formed by winding an outer layer tape around the outer periphery of a main insulating layer and vacuum-impregnated. An epoxy resin composition for insulating a stator coil comprising an epoxy resin component, an acid anhydride curing agent component, and a curing accelerator; a dissolution type in which the curing accelerator is dissolved in an epoxy resin or an acid anhydride. It is insoluble in curing accelerators and epoxy resins and acid anhydrides .
An insulating composition for a stator coil of a rotating electric machine , further comprising a solid hot-melt hardening accelerator having a particle diameter that does not pass through a cross of the outer layer tape .
２０μｍである請求項１記載の回転電機の固定子コイル
の絶縁用組成物。2. The hot melt type curing accelerator has a particle size of 2 to 2.
The insulating composition for a stator coil of a rotating electric machine according to claim 1, which has a thickness of 20 µm.
よって活性化する硬化促進剤が用いられている請求項１
または２記載の回転電機の固定子コイルの絶縁用組成
物。3. A hardening accelerator activated by heating is used as the hot-melt hardening accelerator.
Or a composition for insulating a stator coil of a rotary electric machine according to item 2.
回し主絶縁層を形成し、その外周にテトロンテープなど
の外層テープを巻回して巻線体とし、この巻線体にエポ
キシ樹脂組成物としてエポキシ樹脂成分と、酸無水物硬
化剤成分と、硬化促進剤とを真空加圧含浸する工程を含
んで成る固定子コイルの絶縁用のエポキシ樹脂組成物に
よる絶縁処理方法において； 前記硬化促進剤として、エポキシ樹脂や酸無水物に溶解
する溶解型硬化促進剤と、エポキシ樹脂や酸無水物に不
溶で、かつ、前記外層テープのクロス目を通過しない粒
子径の固形の熱溶融型硬化促進剤とを併用して真空加圧
含浸し、次に加熱硬化するすることを特徴とする回転電
機の固定子コイルの絶縁処理方法。4. A mica tape is wound around the outer periphery of the coil wire to form a main insulating layer, and an outer layer tape such as a tetron tape is wound around the outer periphery thereof to form a winding body. An insulation treatment method using an epoxy resin composition for insulating a stator coil, comprising a step of impregnating an epoxy resin component, an acid anhydride curing agent component, and a curing accelerator under vacuum and pressure; A dissolvable curing accelerator that dissolves in an epoxy resin or an acid anhydride , and a particle that is insoluble in an epoxy resin or an acid anhydride and that does not pass through a cross of the outer layer tape
A method for insulating a stator coil of a rotary electric machine, comprising impregnating with vacuum pressure in combination with a solid-state hot-melt curing accelerator having a diameter and then heating and curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25969294A JP3301237B2 (en) | 1994-09-30 | 1994-09-30 | Composition for insulating stator coil of rotating electric machine and insulation treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25969294A JP3301237B2 (en) | 1994-09-30 | 1994-09-30 | Composition for insulating stator coil of rotating electric machine and insulation treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08103057A JPH08103057A (en) | 1996-04-16 |
| JP3301237B2 true JP3301237B2 (en) | 2002-07-15 |
Family
ID=17337603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25969294A Expired - Fee Related JP3301237B2 (en) | 1994-09-30 | 1994-09-30 | Composition for insulating stator coil of rotating electric machine and insulation treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3301237B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4675741B2 (en) * | 2005-10-06 | 2011-04-27 | 三菱電機株式会社 | Stator coil of rotating electric machine |
| CN100386380C (en) * | 2006-01-23 | 2008-05-07 | 株洲时代新材料科技股份有限公司 | Insulating structure and production for vacuum-pressure immersing process of high-voltage motor |
-
1994
- 1994-09-30 JP JP25969294A patent/JP3301237B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08103057A (en) | 1996-04-16 |
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