JP7000116B2 - Rotating machine and manufacturing method of rotating machine - Google Patents

Rotating machine and manufacturing method of rotating machine Download PDF

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JP7000116B2
JP7000116B2 JP2017208221A JP2017208221A JP7000116B2 JP 7000116 B2 JP7000116 B2 JP 7000116B2 JP 2017208221 A JP2017208221 A JP 2017208221A JP 2017208221 A JP2017208221 A JP 2017208221A JP 7000116 B2 JP7000116 B2 JP 7000116B2
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stator
slot
electric machine
rotary electric
fiber
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JP2019080479A (en
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賢二 池田
啓明 小島
直大 蛭田
大輔 亀川
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Hitachi Industrial Products Ltd
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Hitachi Industrial Products Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/10—Applying solid insulation to windings, stators or rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Description

本発明は、高圧回転電機に係り、特に、固定子鉄心のスロット内部に絶縁構成を含む固定子コイルを収納した後に含浸樹脂を一体注入し硬化する一体注入方式で製造される回転電機に適用して有効な技術に関する。 The present invention relates to a high-pressure rotary electric machine, and is particularly applied to a rotary electric machine manufactured by an integral injection method in which an impregnated resin is integrally injected and cured after a stator coil including an insulating structure is housed inside a slot of a stator core. Regarding effective technology.

鉄道車両用誘導電動機、産業用誘導電動機、風力用発電機、タービン発電機などの高圧回転電機用固定子の絶縁処理方式には、一体注入方式、単独注入方式がある。特に、一体注入絶縁処理方式が採用されている固定子は、一般的に次のように製造される。 Insulation treatment methods for stators for high-pressure rotary electric machines such as induction motors for railway vehicles, industrial induction motors, wind power generators, and turbine generators include an integrated injection method and a single injection method. In particular, a stator in which the integral injection insulation treatment method is adopted is generally manufactured as follows.

先ず、成形された導体にマイカと基材から成るマイカテープを巻回し、その外周に必要に応じてガラステープを巻回した固定子コイルを、内部に有機フィルムなどのスロットライナーを備えた固定子鉄心のスロットへ収納して、含浸樹脂を真空加圧下で一体注入し、その後、硬化して固定子を製造する。 First, a stator coil composed of mica and a base material is wound around a molded conductor, and a glass tape is wound around the outer circumference of the mica tape as needed, and a stator equipped with a slot liner such as an organic film inside. It is housed in the slot of the iron core, the impregnated resin is integrally injected under vacuum pressurization, and then cured to manufacture a stator.

固定子は、導体周囲のマイカテープと含浸樹脂の硬化物から成る主絶縁層や、主絶縁層と鉄心間のスロットライナーと含浸樹脂の硬化物から成るライナ層などに、ボイドや剥離などの空隙が存在すると部分放電等の発生原因となり、初期の電気絶縁特性や長期の絶縁信頼性に悪影響を及ぼす恐れがある。固定子のスロット内部の主絶縁層やライナ層に発生する空隙は、固定子の製造時に含浸樹脂を加熱硬化する工程で、粘度が低下した含浸樹脂がスロット内部から徐々に漏れることで生じる。 The stator is formed in the main insulating layer made of mica tape around the conductor and the cured product of the impregnated resin, the slot liner between the main insulating layer and the iron core, and the liner layer made of the hardened material of the impregnated resin. If present, it may cause partial discharge or the like, which may adversely affect the initial electrical insulation characteristics and long-term insulation reliability. The voids generated in the main insulating layer and the liner layer inside the slot of the stator are generated by the impregnating resin having a reduced viscosity gradually leaking from the inside of the slot in the process of heating and curing the impregnated resin during the manufacturing of the stator.

特に、ライナ層には有機フィルムなどの表面が平滑なシート材が採用されるため、マイカ絶縁層に比べると含浸樹脂が漏れやすくなり、また、固定子が大型化するほどライナ層の含浸樹脂が漏れやすくなる。このため、固定子の製造時に含浸樹脂を加熱硬化する工程では、固定子を周方向に回転させながら硬化する回転乾燥工程を導入して、スロット内部からの含浸樹脂の漏れを防止し、固定子の性能低下を阻止している。 In particular, since a sheet material having a smooth surface such as an organic film is used for the liner layer, the impregnated resin leaks more easily than the mica insulating layer, and the larger the stator, the more the impregnated resin of the liner layer becomes. It becomes easy to leak. For this reason, in the process of heating and curing the impregnated resin during the manufacture of the stator, a rotation drying process is introduced in which the stator is cured while rotating in the circumferential direction to prevent leakage of the impregnated resin from the inside of the slot and to prevent the stator from leaking. It prevents the performance deterioration of.

この一方、回転乾燥工程は硬化前に治具取付けの工数、硬化後には治具の取外しやメンテナンスの工数を要するため生産性の低下や、さらに回転乾燥工程に合せた専用硬化装置が必要となるため設備面でのコスト上昇の恐れがある。 On the other hand, the rotary drying process requires man-hours for attaching a jig before curing, and man-hours for removing and maintaining the jig after curing, which reduces productivity and requires a dedicated curing device suitable for the rotary drying process. Therefore, there is a risk of cost increase in terms of equipment.

本技術分野の背景技術として、例えば、特許文献１のような技術がある。特許文献１には、固定子の主絶縁層と鉄心間の含浸樹脂の漏れを防止する構成の例として、主絶縁層表面に設けたコロナ防止層に、半導電性樹脂が塗布された熱収縮性の高分子フィルムの反対面に集成マイカとエポキシ樹脂組成物とからなる集成マイカ絶縁部材を貼りあわせて構成されたコロナ防止テープまたはシートを巻回して形成した構成で含浸樹脂の漏れを防止する技術が開示されている。 As a background technology in this technical field, for example, there is a technology such as Patent Document 1. In Patent Document 1, as an example of a configuration for preventing leakage of the impregnated resin between the main insulating layer of the stator and the iron core, heat shrinkage in which a semi-conductive resin is applied to a corona prevention layer provided on the surface of the main insulating layer. The impregnated resin is prevented from leaking by winding a corona prevention tape or a sheet formed by laminating an aggregated mica insulating member composed of an assembled mica and an epoxy resin composition on the opposite surface of the property polymer film. The technology is disclosed.

特開２００３－２５９５８９号公報Japanese Patent Application Laid-Open No. 2003-259589

固定子スロット内部の主絶縁層と鉄心間の含浸樹脂の漏れの抑制には、ガラス繊維を挿入する方法やガラスクロスと集成マイカを組合せた部材を介在させる方法が提案されている。一方で、生産面や設備面で改善余地が大きい回転乾燥工程を廃止して静止乾燥工程へ導く方法に対しては、上記特許文献１では触れられていない。これは固定子スロット内部の含浸樹脂の漏れを特許文献１のような従来技術範囲の絶縁構成では抑制しきれていないという課題が顕在化していると考えられる。 In order to suppress leakage of the impregnated resin between the main insulating layer inside the stator slot and the iron core, a method of inserting glass fibers or a method of interposing a member combining a glass cloth and an assembled mica has been proposed. On the other hand, the above-mentioned Patent Document 1 does not mention a method of abolishing the rotary drying process, which has a lot of room for improvement in terms of production and equipment, and leading to the static drying process. It is considered that this is due to the fact that the leakage of the impregnated resin inside the stator slot cannot be completely suppressed by the insulation configuration within the range of the prior art as in Patent Document 1.

そこで、本発明の目的は、製造コストを抑えつつ、絶縁信頼性の高い回転電機を提供することにある。 Therefore, an object of the present invention is to provide a rotary electric machine having high insulation reliability while suppressing a manufacturing cost.

また、本発明の別の目的は、固定子鉄心のスロット内部に固定子コイルを収納した後に含浸樹脂を一体注入し硬化する一体注入方式の回転電機の製造方法において、製造コストを抑えつつ、絶縁信頼性の高い回転電機を製造可能な回転電機の製造方法を提供することにある。 Another object of the present invention is an integral injection type rotary electric machine in which an impregnated resin is integrally injected and cured after the stator coil is housed in the slot of the stator core, and insulation is performed while suppressing the manufacturing cost. It is an object of the present invention to provide a manufacturing method of a rotary electric machine capable of manufacturing a highly reliable rotary electric machine.

上記課題を解決するために、本発明は、コイル導体と、前記コイル導体の周囲に配置される主絶縁層と、前記主絶縁層の周囲に配置されるスロットライナーと、から構成される固定子コイルと、積層された複数の鋼板で構成され、前記固定子コイルを格納する固定子スロットを有する固定子鉄心と、を備える回転電機であって、前記主絶縁層と前記固定子スロットとの間に第一のクロス繊維と、前記第一のクロス繊維よりも前記主絶縁層側に配置される第二のクロス繊維と、を有し、前記固定子鉄心の軸方向において、前記第一のクロス繊維の長さは前記固定子スロットの長さよりも短く、前記第二のクロス繊維の長さは前記固定子スロットの長さ以上であることを特徴とする。 In order to solve the above problems, the present invention has a stator composed of a coil conductor, a main insulating layer arranged around the coil conductor, and a slot liner arranged around the main insulating layer. A rotary electric machine comprising a coil, a stator core composed of a plurality of laminated steel plates and having a stator slot for accommodating the stator coil, and between the main insulating layer and the stator slot. The first cloth has a first cloth fiber and a second cloth fiber arranged on the main insulating layer side of the first cloth fiber, and the first cloth is provided in the axial direction of the stator core. The length of the fiber is shorter than the length of the stator slot, and the length of the second cross fiber is equal to or larger than the length of the stator slot .

また、本発明は、（ａ）コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回し固定子コイルを形成する工程、（ｂ）前記固定子コイルの周囲に、固定子鉄心の軸方向において固定子鉄心のスロットの長さよりも短い第一のクロス繊維と前記スロットの長さ以上である第二のクロス繊維を配置する工程、（ｃ）前記（ｂ）工程の後、前記固定子コイルを前記スロット内に収納する工程、（ｄ）前記固定子コイルを前記スロット内に収納した状態で、真空加圧下で含浸樹脂を前記スロット内に注入する工程、（ｅ）前記（ｄ）工程の後、前記スロット内に注入した含浸樹脂を静止乾燥により加熱硬化する工程、を含む回転電機の製造方法である。 Further, the present invention comprises (a) a step of winding a mica tape composed of at least mica and a base material around a coil conductor to form a stator coil, and (b) a stator core around the stator coil. After the step of arranging the first cross fiber shorter than the slot length of the stator core and the second cross fiber equal to or longer than the slot length in the axial direction of (c) the step (b), the said step. A step of accommodating the stator coil in the slot , (d) a step of injecting an impregnated resin into the slot under vacuum pressurization with the stator coil housed in the slot, (e) the above (d). ) Is a method for manufacturing a rotary electric machine, which comprises a step of heating and curing the impregnated resin injected into the slot by static drying.

本発明によれば、静止乾燥工程を導入して製造した回転電機用固定子において、スロット内部の主絶縁層と鉄心間の空隙発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上することができる。 According to the present invention, in the stator for rotary electric machines manufactured by introducing the static drying process, the generation of voids between the main insulating layer inside the slot and the iron core is eliminated, and the initial electrical insulation characteristics and long-term insulation reliability are improved. Can be improved.

これにより、製造コストを抑えつつ、絶縁信頼性の高い回転電機を提供することができる。 As a result, it is possible to provide a rotary electric machine having high insulation reliability while suppressing the manufacturing cost.

また、製造コストを抑えつつ、絶縁信頼性の高い回転電機を製造可能な回転電機の製造方法を提供することができる。 Further, it is possible to provide a method for manufacturing a rotary electric machine capable of manufacturing a rotary electric machine having high insulation reliability while suppressing the manufacturing cost.

上記した以外の課題、構成および効果は、以下の実施形態の説明によって明らかにされる。 Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

本発明の一実施形態に係る固定子の断面正面図である。It is sectional drawing front view of the stator which concerns on one Embodiment of this invention. 本発明の一実施形態に係る固定子スロットの断面斜視拡大図である。（実施例１）It is sectional perspective enlarged view of the stator slot which concerns on one Embodiment of this invention. (Example 1) 本発明の一実施形態に係る固定子スロットの断面斜視拡大図である。（実施例２）It is sectional perspective enlarged view of the stator slot which concerns on one Embodiment of this invention. (Example 2) 本発明の一実施形態に係る固定子スロットの断面斜視拡大図である。（実施例３）It is sectional perspective enlarged view of the stator slot which concerns on one Embodiment of this invention. (Example 3) 本発明の一実施形態に係る固定子スロットの断面斜視拡大図である。（実施例４）It is sectional perspective enlarged view of the stator slot which concerns on one Embodiment of this invention. (Example 4) 本発明の一実施形態に係る固定子スロットの断面斜視拡大図である。（実施例５）It is sectional perspective enlarged view of the stator slot which concerns on one Embodiment of this invention. (Example 5) 本発明の一実施形態に係る固定子スロットの断面斜視拡大図である。（実施例６）It is sectional perspective enlarged view of the stator slot which concerns on one Embodiment of this invention. (Example 6)

以下、図面を用いて本発明の実施例を説明する。なお、各図面において、同一の構成については同一の符号を付し、重複する部分についてはその詳細な説明は省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same components are designated by the same reference numerals, and the detailed description of the overlapping portions will be omitted.

本発明は、固定子スロット内部の主絶縁層と鉄心間の含浸樹脂の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層と鉄心間のボイドや剥離による空隙の発生をなくすことを可能とする構成である。 The present invention further enhances the suppression of leakage of the impregnated resin between the main insulating layer inside the stator slot and the iron core, and even if a static drying process is introduced, voids and peeling between the main insulating layer and the iron core generate voids. It is a configuration that can be eliminated.

図１および図２を参照して、実施例１の回転電機とその製造方法について説明する。図１は固定子の断面正面図を示し、図２は本実施例の固定子スロットの内部を詳細に示す固定子スロットの断面斜視拡大図である。なお、図１は以降の各実施例に共通する固定子鉄心の概略構成を示しており、固定子鉄心１に固定子コイル２が挿入された状態を示している。 The rotary electric machine of the first embodiment and a method for manufacturing the same will be described with reference to FIGS. 1 and 2. FIG. 1 shows a front view of a cross section of the stator, and FIG. 2 is an enlarged cross-sectional perspective view of the stator slot showing the inside of the stator slot of the present embodiment in detail. Note that FIG. 1 shows a schematic configuration of a stator core common to each of the following embodiments, and shows a state in which the stator coil 2 is inserted into the stator core 1.

図２は本実施例の回転電機の固定子スロット４の一部を拡大して、スロット内部を詳細に表した図（図１のＡ部拡大図）であり、含浸樹脂８の漏れが生じやすい固定子スロット４内部の主絶縁層３と固定子スロット４の間に、毛細管現象の機能を有するクロス繊維を複数配置し、例えばスロットライナー７を配置した状態でクロス繊維を２層（第一のクロス繊維５および第二のクロス繊維６）を配置した例である。 FIG. 2 is a view (enlarged view of part A in FIG. 1) in which a part of the stator slot 4 of the rotary electric machine of the present embodiment is enlarged to show the inside of the slot in detail, and the impregnated resin 8 is likely to leak. A plurality of cross fibers having a function of a capillary phenomenon are arranged between the main insulating layer 3 inside the stator slot 4 and the stator slot 4, for example, two layers of cloth fibers (first) with the slot liner 7 arranged. This is an example in which the cross fiber 5 and the second cross fiber 6) are arranged.

本実施例では、図２に示すように、一方のクロス繊維（第一のクロス繊維５）の長手方向の長さを固定子スロット４よりも短くし、もう一方のクロス繊維（第二のクロス繊維６）の長手方向の長さを固定子スロット４以上の長さとしている。これにより、固定子スロット４内部の両端に複数のクロス繊維の長さが違う箇所に形成した僅かな隙間において毛細管現象が発現する。 In this embodiment, as shown in FIG. 2, the length of one cross fiber (first cross fiber 5) in the longitudinal direction is shorter than that of the stator slot 4, and the other cross fiber (second cross) is used. The length of the fiber 6) in the longitudinal direction is set to the length of the stator slot 4 or more. As a result, the capillary phenomenon appears in the slight gaps formed in the positions where the lengths of the plurality of cross fibers are different at both ends inside the stator slot 4.

なお、本明細書中では、固定子スロット４内において外側（固定子スロット４側）に配置されるクロス繊維を「第一のクロス繊維５」と呼び、内側（主絶縁層３側或いは固定子コイル側）に配置されるクロス繊維を「第二のクロス繊維６」と呼ぶ。 In the present specification, the cloth fiber arranged on the outside (the stator slot 4 side) in the stator slot 4 is referred to as the "first cross fiber 5", and is referred to as the inside (main insulating layer 3 side or the stator). The cross fiber arranged on the coil side) is called "second cross fiber 6".

したがって、本実施例の固定子スロット４内は、クロス繊維自体による毛細管現象と、長手方向の長さを変えて配置した複数のクロス繊維で形成した僅かな空隙による毛細管現象の機能を有す構成としているため、主絶縁層３と固定子スロット４間の含浸樹脂の漏れを従来よりも抑制することができる。 Therefore, the stator slot 4 of the present embodiment has a function of a capillary phenomenon due to the cloth fiber itself and a capillary phenomenon due to a slight gap formed by a plurality of cloth fibers arranged at different lengths in the longitudinal direction. Therefore, leakage of the impregnated resin between the main insulating layer 3 and the stator slot 4 can be suppressed as compared with the conventional case.

さらに、固定子スロット４からの樹脂漏れを大幅に抑制できるため、固定子の回転乾燥工程を静止乾燥工程に変えることも可能となる。 Further, since the resin leakage from the stator slot 4 can be significantly suppressed, it is possible to change the rotary drying process of the stator to the static drying process.

次に、本実施例の固定子の構成とこの固定子を用いた回転電機を詳細に説明する。 Next, the configuration of the stator of this embodiment and the rotary electric machine using the stator will be described in detail.

［クロス繊維］
本実施例のクロス繊維は材質や寸法などは特に限定ないが、材質は適用条件に応じてガラス、セラミックなどの無機物、ポリエステルやアラミドなどの高分子やセルロースなどの天然繊維などの有機物のクロス繊維、無機物と有機物を使用したクロス繊維などを使用することができる。 [Cross fiber]
The material and dimensions of the cloth fiber of this embodiment are not particularly limited, but the material is an inorganic material such as glass or ceramic, a polymer such as polyester or aramid, or an organic material such as natural fiber such as cellulose. , Cross fibers using inorganic and organic substances can be used.

寸法として、特にクロス繊維の厚さは、適用箇所の寸法に応じて、同じ厚さのクロス繊維の組合せや異なる厚さのクロス繊維を組合せて使用することができる。また、固定子スロット４内へ配置するクロス繊維は、例えば、２層配置する場合に空隙を設けるための寸法は、一方のクロス繊維の長手方向の長さを固定子スロット４よりも短くし、もう一方のクロス繊維の長手方向の長さを固定子スロット４以上であれば良く、特に制限しない。また、クロス繊維の全体、あるいは固定子スロット４の出口近傍に、硬化触媒や硬化促進剤、エポキシ樹脂、硬化剤、これらの樹脂組成物などを予め付加して置き、硬化時にその箇所が早めに硬化して樹脂の流出を抑える機能を付加することもできる。 As for the dimensions, particularly the thickness of the cloth fibers, a combination of cloth fibers having the same thickness or a combination of cloth fibers having different thicknesses can be used depending on the dimensions of the application site. Further, the cross fibers arranged in the stator slot 4 have, for example, a dimension for providing a gap when two layers are arranged so that the length of one of the cross fibers in the longitudinal direction is shorter than that of the stator slot 4. The length of the other cross fiber in the longitudinal direction may be any longer as long as it is the stator slot 4 or more, and is not particularly limited. Further, a curing catalyst, a curing accelerator, an epoxy resin, a curing agent, a resin composition thereof, etc. are added in advance to the entire cloth fiber or near the outlet of the stator slot 4, and the portion is placed earlier at the time of curing. It is also possible to add a function of curing and suppressing the outflow of the resin.

ところで、固定子スロット４内に配置するクロス繊維の配置方法と、固定子スロット４内から漏れる含浸樹脂量の関係は、本実施例のように複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を固定子鉄心１（固定子スロット４）以上に長くしたもの（第二のクロス繊維６）と固定子鉄心１（固定子スロット４）より短くしたもの（第一のクロス繊維５）に長手方向の長さを変えて配置した場合、同一長のクロス繊維を複数重ねて配置した場合、クロス繊維が１層の場合、を比較すると、本実施例のようにクロス繊維を複数層配置する方法＞２層（複数）を重ねて配置する方法＞１層を配置する方法の順で含浸樹脂８の漏れ量低減（抑制）の効果が得られる。 By the way, the relationship between the method of arranging the cloth fibers arranged in the stator slot 4 and the amount of the impregnated resin leaking from the stator slot 4 is as follows in the present embodiment with a plurality of cloth fibers (first cross fibers 5 and the first cloth fiber). The second cross fiber 6) is longer than the stator core 1 (fixer slot 4) (second cross fiber 6) and shorter than the stator core 1 (fixer slot 4) (first cloth). When comparing the case where the fibers 5) are arranged with different lengths in the longitudinal direction, the case where a plurality of cloth fibers having the same length are arranged in layers, and the case where the cloth fibers are one layer, the cloth fibers are arranged as in the present embodiment. The effect of reducing (suppressing) the leakage amount of the impregnated resin 8 can be obtained in the order of the method of arranging a plurality of layers> the method of arranging two layers (plurality) in layers> the method of arranging one layer.

以上より、クロス繊維を単純に複数枚重ねることで固定子スロット４からの含浸樹脂８の流出量を抑えることも原理上可能であると考えられるが、複数枚重ねた分の寸法や重ねる作業が、固定子コイル２の寸法増大や製造工数の増加に繋がる弊害が生じる。従って、本実施例では最低２枚のクロス繊維を配置するのみで良いため、固定子コイル寸法や製造工数の増加を最小限にとどめた上で、固定子スロット４からの含浸樹脂８の流出を防止して、固定子スロット４内部の主絶縁層３と固定子鉄心１（固定子スロット４）間の空隙の発生をなくすことができる。 From the above, it is considered possible in principle to suppress the outflow amount of the impregnated resin 8 from the stator slot 4 by simply stacking a plurality of cloth fibers, but the dimensions and the work of stacking the plurality of fibers are required. , There is an adverse effect that leads to an increase in the dimensions of the stator coil 2 and an increase in manufacturing man-hours. Therefore, in this embodiment, only two cloth fibers need to be arranged, so that the impregnation resin 8 flows out from the stator slot 4 while minimizing the increase in the stator coil size and the manufacturing man-hours. By preventing this, it is possible to eliminate the generation of a gap between the main insulating layer 3 inside the stator slot 4 and the stator core 1 (stator slot 4).

以上説明したように、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイルと、鋼板が積層されて構成された固定子コイルを格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４と主絶縁層３との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも短く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以上の構成として、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 As described above, in the rotary electric machine of the present embodiment, a stator coil in which at least a mica tape composed of mica and a base material is wound around a coil conductor, and a stator formed by laminating steel plates. It has a stator core 1 in which a stator slot 4 for accommodating a coil is formed, and has a plurality of cross fibers (first cross fiber 5 and a second cross fiber 5) between the stator slot 4 and the main insulating layer 3. The cross fiber 6) is arranged, and the first cross fiber 5 among the plurality of cross fibers has a length in the longitudinal direction shorter than that of the stator core 1 (stator slot 4), and among the plurality of cross fibers. The second cross fiber 6 has a structure in which the length in the longitudinal direction is longer than the length of the stator core 1 (stator slot 4), the impregnated resin 8 is integrally injected under vacuum pressure, and the second cloth fiber 6 is heat-cured in a static drying step. The stator for rotary electric machine manufactured by this is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

図３を参照して、実施例２の回転電機とその製造方法について説明する。図３は本実施例の固定子スロットの内部を詳細に示す固定子スロットの断面斜視拡大図であり、実施例１の図２に相当する図である。 The rotary electric machine of the second embodiment and a method for manufacturing the same will be described with reference to FIG. FIG. 3 is an enlarged cross-sectional perspective view of the stator slot showing the inside of the stator slot of the present embodiment in detail, and is a diagram corresponding to FIG. 2 of the first embodiment.

実施例１では、主絶縁層３と固定子スロット４の間に配置する複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を、固定子鉄心１（固定子スロット４）以上に長くしたもの（第二のクロス繊維６）と固定子鉄心１（固定子スロット４）より短くしたもの（第一のクロス繊維５）に長手方向の長さを変えて配置しているが、本実施例では、固定子鉄心１（固定子スロット４）以上に長くしたもの（第一のクロス繊維５）と固定子鉄心１（固定子スロット４）より短くしたもの（第二のクロス繊維６）に長手方向の長さを変えて配置している点において、実施例１とは異なる。 In the first embodiment, a plurality of cross fibers (first cross fiber 5 and second cross fiber 6) arranged between the main insulating layer 3 and the stator slot 4 are provided with the stator core 1 (stator slot 4). Although the length in the longitudinal direction is changed between the one longer than the above (second cross fiber 6) and the one shorter than the stator core 1 (stator slot 4) (first cross fiber 5). In this embodiment, the one longer than the stator core 1 (stator slot 4) (first cross fiber 5) and the one shorter than the stator core 1 (stator slot 4) (second cross fiber). It differs from Example 1 in that it is arranged in 6) with a different length in the longitudinal direction.

つまり、クロス繊維の（固定子鉄心１の）長手方向の長さが、実施例１では「第一のクロス繊維５の長さ＜第二のクロス繊維６の長さ」となっているのに対し、本実施例では反対に「第一のクロス繊維５の長さ＞第二のクロス繊維６の長さ」となっている。 That is, even though the length of the cross fiber (of the stator core 1) in the longitudinal direction is "the length of the first cross fiber 5 <the length of the second cross fiber 6" in the first embodiment. On the other hand, in this embodiment, on the contrary, "the length of the first cross fiber 5> the length of the second cross fiber 6".

すなわち、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイル２と、鋼板が積層されて構成された固定子コイル２を格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４と主絶縁層３との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも長く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以下の構成として、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 That is, in the rotary electric machine of the present embodiment, a stator coil 2 in which at least a mica tape composed of mica and a base material is wound around a coil conductor and a stator coil 2 formed by laminating steel plates are provided. It has a stator core 1 in which a stator slot 4 to be stored is formed, and a plurality of cross fibers (first cross fiber 5 and second cross fiber) are provided between the stator slot 4 and the main insulating layer 3. 6) is arranged, and the first cross fiber 5 among the plurality of cross fibers has a length in the longitudinal direction longer than the stator core 1 (stator slot 4), and the second among the plurality of cross fibers. The cross fiber 6 has a length in the longitudinal direction equal to or less than the length of the stator core 1 (stator slot 4), and the impregnated resin 8 is integrally injected under vacuum pressure and heat-cured in a static drying step. The stator for rotary electric machine manufactured in is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

図４を参照して、実施例３の回転電機とその製造方法について説明する。図４は本実施例の固定子スロットの内部を詳細に示す固定子スロットの断面斜視拡大図であり、実施例１（図２）の変形例に相当する。 The rotary electric machine of the third embodiment and a method for manufacturing the same will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional perspective view of the stator slot showing the inside of the stator slot of the present embodiment in detail, and corresponds to a modified example of the first embodiment (FIG. 2).

実施例１では、長手方向の長さを変えた複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を、主絶縁層３と固定子スロット４の間に配置しているのに対し、本実施例では、固定子スロット４の内側にフィルムやシートなどから成るスロットライナー７が配置され、スロットライナー７と主絶縁層３との間に長手方向の長さを変えた複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を配置している点において、実施例１とは異なる。 In the first embodiment, a plurality of cross fibers (first cross fiber 5 and second cross fiber 6) having different lengths in the longitudinal direction are arranged between the main insulating layer 3 and the stator slot 4. On the other hand, in this embodiment, a plurality of slot liners 7 made of a film, a sheet, or the like are arranged inside the stator slot 4, and the lengths in the longitudinal direction are changed between the slot liner 7 and the main insulating layer 3. It differs from Example 1 in that the cross fibers (first cross fiber 5 and second cross fiber 6) are arranged.

なお、クロス繊維の（固定子コイル２の）長手方向の長さが、「第一のクロス繊維５の長さ＜第二のクロス繊維６の長さ」となっている点においては、実施例１と同様である。 In addition, in the point that the length in the longitudinal direction (of the stator coil 2) of the cross fiber is "the length of the first cross fiber 5 <the length of the second cross fiber 6", the embodiment. It is the same as 1.

すなわち、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイル２と、鋼板が積層されて構成された固定子コイル２を格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４の内側にフィルムやシートなどから成るスロットライナー７が配置され、スロットライナー７と主絶縁層３との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも短く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以上の構成として、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 That is, in the rotary electric machine of the present embodiment, a stator coil 2 in which at least a mica tape composed of mica and a base material is wound around a coil conductor and a stator coil 2 formed by laminating steel plates are provided. It has a stator core 1 in which a stator slot 4 for storing is formed, and a slot liner 7 made of a film, a sheet or the like is arranged inside the stator slot 4, and the slot liner 7 and the main insulating layer 3 are arranged. A plurality of cross fibers (first cross fiber 5 and second cross fiber 6) are arranged between them, and the first cross fiber 5 among the plurality of cross fibers has a stator core having a length in the longitudinal direction. The second cross fiber 6 among the plurality of cross fibers, which is shorter than 1 (stator slot 4), is impregnated so that the length in the longitudinal direction is longer than the length of the stator core 1 (stator slot 4). A stator for a rotary electric machine manufactured by integrally injecting the resin 8 under vacuum pressurization and heating and curing in a static drying step is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

図５を参照して、実施例４の回転電機とその製造方法について説明する。図５は本実施例の固定子スロットの内部を詳細に示す固定子スロットの断面斜視拡大図であり、実施例２（図３）の変形例に相当する。 The rotary electric machine of the fourth embodiment and a method for manufacturing the same will be described with reference to FIG. FIG. 5 is an enlarged cross-sectional perspective view of the stator slot showing the inside of the stator slot of the present embodiment in detail, and corresponds to a modified example of the second embodiment (FIG. 3).

実施例２では、長手方向の長さを変えた複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を、主絶縁層３と固定子スロット４の間に配置しているのに対し、本実施例では、固定子スロット４の内側にフィルムやシートなどから成るスロットライナー７が配置され、スロットライナー７と主絶縁層３との間に長手方向の長さを変えた複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を配置している点において、実施例１とは異なる。 In the second embodiment, a plurality of cross fibers (first cross fiber 5 and second cross fiber 6) having different lengths in the longitudinal direction are arranged between the main insulating layer 3 and the stator slot 4. On the other hand, in this embodiment, a plurality of slot liners 7 made of a film, a sheet, or the like are arranged inside the stator slot 4, and the lengths in the longitudinal direction are changed between the slot liner 7 and the main insulating layer 3. It differs from Example 1 in that the cross fibers (first cross fiber 5 and second cross fiber 6) are arranged.

なお、クロス繊維の（固定子コイル２の）長手方向の長さが、「第一のクロス繊維５の長さ＞第二のクロス繊維６の長さ」となっている点においては、実施例２と同様である。 In addition, in the point that the length in the longitudinal direction (of the stator coil 2) of the cross fiber is "the length of the first cross fiber 5> the length of the second cross fiber 6", the embodiment. It is the same as 2.

すなわち、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイル２と、鋼板が積層されて構成された固定子コイル２を格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４の内側にフィルムやシートなどから成るスロットライナー７が配置され、スロットライナー７と主絶縁層３との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも長く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以下の構成として、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 That is, in the rotary electric machine of the present embodiment, a stator coil 2 in which at least a mica tape composed of mica and a base material is wound around a coil conductor and a stator coil 2 formed by laminating steel plates are provided. It has a stator core 1 in which a stator slot 4 for storing is formed, and a slot liner 7 made of a film, a sheet or the like is arranged inside the stator slot 4, and the slot liner 7 and the main insulating layer 3 are arranged. A plurality of cross fibers (first cross fiber 5 and second cross fiber 6) are arranged between them, and the first cross fiber 5 among the plurality of cross fibers has a stator core having a length in the longitudinal direction. The second cross fiber 6 among the plurality of cross fibers, which is longer than 1 (stator slot 4), is impregnated so that the length in the longitudinal direction is equal to or less than the length of the stator core 1 (stator slot 4). A stator for a rotary electric machine manufactured by integrally injecting the resin 8 under vacuum pressurization and heating and curing in a static drying step is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

図６を参照して、実施例５の回転電機とその製造方法について説明する。図６は本実施例の固定子スロットの内部を詳細に示す固定子スロットの断面斜視拡大図であり、実施例３（図４）の変形例に相当する。 The rotary electric machine of the fifth embodiment and a method for manufacturing the same will be described with reference to FIG. FIG. 6 is an enlarged cross-sectional perspective view of the stator slot showing the inside of the stator slot of the present embodiment in detail, and corresponds to a modified example of the third embodiment (FIG. 4).

実施例３では、長手方向の長さを変えた複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を、スロットライナー７と主絶縁層３との間に配置しているのに対し、本実施例では、固定子スロット４とスロットライナー７との間に配置している点において、実施例３とは異なる。 In the third embodiment, a plurality of cross fibers (first cross fiber 5 and second cross fiber 6) having different lengths in the longitudinal direction are arranged between the slot liner 7 and the main insulating layer 3. On the other hand, this embodiment is different from the third embodiment in that it is arranged between the stator slot 4 and the slot liner 7.

なお、クロス繊維の（固定子コイル２の）長手方向の長さが、「第一のクロス繊維５の長さ＜第二のクロス繊維６の長さ」となっている点においては、実施例３と同様である。 In addition, in the point that the length in the longitudinal direction (of the stator coil 2) of the cross fiber is "the length of the first cross fiber 5 <the length of the second cross fiber 6", the embodiment. It is the same as 3.

すなわち、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイル２と、鋼板が積層されて構成された固定子コイル２を格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４の内側にフィルムやシートなどから成るスロットライナー７が配置され、固定子スロット４とスロットライナー７との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、前記複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも短く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以上の構成として、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 That is, in the rotary electric machine of the present embodiment, a stator coil 2 in which at least a mica tape composed of mica and a base material is wound around a coil conductor and a stator coil 2 formed by laminating steel plates are provided. It has a stator core 1 in which a stator slot 4 to be stored is formed, and a slot liner 7 made of a film, a sheet or the like is arranged inside the stator slot 4, and the stator slot 4 and the slot liner 7 are arranged. A plurality of cross fibers (first cross fiber 5 and second cross fiber 6) are arranged between them, and the first cross fiber 5 among the plurality of cross fibers has a stator length in the longitudinal direction. The second cross fiber 6 among the plurality of cross fibers, which is shorter than the core 1 (stator slot 4), has a length in the longitudinal direction equal to or longer than the length of the stator core 1 (stator slot 4). A stator for a rotary electric machine manufactured by integrally injecting the impregnated resin 8 under vacuum pressure and heating and curing in a static drying step is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

図７を参照して、実施例６の回転電機とその製造方法について説明する。図７は本実施例の固定子スロットの内部を詳細に示す固定子スロットの断面斜視拡大図であり、実施例４（図５）の変形例に相当する。 The rotary electric machine of the sixth embodiment and a method for manufacturing the same will be described with reference to FIG. 7. FIG. 7 is an enlarged cross-sectional perspective view of the stator slot showing the inside of the stator slot of the present embodiment in detail, and corresponds to a modified example of the fourth embodiment (FIG. 5).

実施例４では、長手方向の長さを変えた複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）を、スロットライナー７と主絶縁層３との間に配置しているのに対し、本実施例では、固定子スロット４とスロットライナー７との間に配置している点において、実施例４とは異なる。 In the fourth embodiment, a plurality of cloth fibers (first cloth fiber 5 and second cloth fiber 6) having different lengths in the longitudinal direction are arranged between the slot liner 7 and the main insulating layer 3. On the other hand, this embodiment is different from the fourth embodiment in that it is arranged between the stator slot 4 and the slot liner 7.

なお、クロス繊維の（固定子コイル２の）長手方向の長さが、「第一のクロス繊維５の長さ＞第二のクロス繊維６の長さ」となっている点においては、実施例４と同様である。 In addition, in the point that the length in the longitudinal direction (of the stator coil 2) of the cross fiber is "the length of the first cross fiber 5> the length of the second cross fiber 6", the embodiment. It is the same as 4.

すなわち、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイル２と、鋼板が積層されて構成された固定子コイル２を格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４の内側にフィルムやシートなどから成るスロットライナー７が配置され、固定子スロット４とスロットライナー７との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも長く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以下の構成として、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 That is, in the rotary electric machine of the present embodiment, a stator coil 2 in which at least a mica tape composed of mica and a base material is wound around a coil conductor and a stator coil 2 formed by laminating steel plates are provided. It has a stator core 1 in which a stator slot 4 to be stored is formed, and a slot liner 7 made of a film, a sheet or the like is arranged inside the stator slot 4, and the stator slot 4 and the slot liner 7 are arranged. A plurality of cross fibers (first cross fiber 5 and second cross fiber 6) are arranged between them, and the first cross fiber 5 among the plurality of cross fibers has a stator core having a length in the longitudinal direction. The second cross fiber 6 among the plurality of cross fibers, which is longer than 1 (stator slot 4), is impregnated so that the length in the longitudinal direction is equal to or less than the length of the stator core 1 (stator slot 4). A stator for a rotary electric machine manufactured by integrally injecting the resin 8 under vacuum pressurization and heating and curing in a static drying step is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

最後に、実施例７の回転電機とその製造方法について説明する。本実施例では、実施例１の構成において、複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）に、エポキシ樹脂および硬化促進剤の少なくともいずれか一方を含む樹脂組成物を付加する構成とする。 Finally, the rotary electric machine of Example 7 and its manufacturing method will be described. In this example, in the configuration of Example 1, a resin composition containing at least one of an epoxy resin and a curing accelerator in a plurality of cloth fibers (first cloth fiber 5 and second cloth fiber 6) is provided. The configuration is to be added.

すなわち、本実施例の回転電機においては、コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回した固定子コイル２と、鋼板が積層されて構成された固定子コイル２を格納する固定子スロット４が形成された固定子鉄心１と、を有し、固定子スロット４と主絶縁層３との間に複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）が配置されており、複数のクロス繊維のうち第一のクロス繊維５は、長手方向の長さが固定子鉄心１（固定子スロット４）よりも短く、複数のクロス繊維のうち第二のクロス繊維６は、長手方向の長さが固定子鉄心１（固定子スロット４）の長さ以上の構成として、複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）にエポキシ樹脂および硬化促進剤の少なくともいずれか一方を含む樹脂組成物を付加しておき、含浸樹脂８を真空加圧下で一体注入し、静止乾燥工程で加熱硬化することで製作した回転電機用固定子を用いている。 That is, in the rotary electric machine of the present embodiment, a stator coil 2 in which at least a mica tape composed of mica and a base material is wound around a coil conductor and a stator coil 2 formed by laminating steel plates are provided. It has a stator core 1 in which a stator slot 4 to be stored is formed, and a plurality of cross fibers (first cross fiber 5 and second cross fiber) are provided between the stator slot 4 and the main insulating layer 3. 6) is arranged, and the first cross fiber 5 among the plurality of cross fibers has a length in the longitudinal direction shorter than the stator core 1 (stator slot 4), and the second among the plurality of cross fibers. The cross fiber 6 is composed of a plurality of cross fibers (first cross fiber 5 and second cross fiber 6) having a length in the longitudinal direction equal to or longer than the length of the stator core 1 (stator slot 4). A stator for rotary electric machines manufactured by adding a resin composition containing at least one of an epoxy resin and a curing accelerator, integrally injecting the impregnated resin 8 under vacuum pressure, and heating and curing in a static drying step. Is used.

これにより、固定子スロット４内部の主絶縁層３と鉄心（固定子スロット４）間の含浸樹脂８の漏れの抑制をより高めて、静止乾燥工程を導入しても主絶縁層３と鉄心（固定子スロット４）間のボイドや剥離による空隙の発生をなくして、初期の電気絶縁特性や長期の絶縁信頼性を向上した回転電機の固定子を得ることができる。 As a result, the suppression of leakage of the impregnated resin 8 between the main insulating layer 3 inside the stator slot 4 and the iron core (stator slot 4) is further enhanced, and even if the static drying process is introduced, the main insulating layer 3 and the iron core (the main insulating layer 3) By eliminating the generation of voids and voids due to voids and peeling between the stator slots 4), it is possible to obtain a stator of a rotary electric machine having improved initial electrical insulation characteristics and long-term insulation reliability.

つまり、本実施例のスロット内の第一のクロス繊維５と第二のクロス繊維６とその配置方法による毛細管現象の機能によって、固定子スロット４からの含浸樹脂８の漏れがなく、含浸樹脂８が所定箇所に充填できるため、電気絶縁性に優れた回転電機を提供することができる。 That is, due to the function of the capillary phenomenon by the first cross fiber 5 and the second cross fiber 6 in the slot of this embodiment and the arrangement method thereof, the impregnated resin 8 does not leak from the stator slot 4, and the impregnated resin 8 is not leaked. Can be filled in a predetermined place, so that it is possible to provide a rotary electric machine having excellent electrical insulation.

なお、複数のクロス繊維（第一のクロス繊維５および第二のクロス繊維６）に、エポキシ樹脂および硬化促進剤の少なくともいずれか一方を含む樹脂組成物を付加する本実施例の構成は、実施例１の構成のみならず、上記の実施例２～６の各実施例の構成においても適用可能であることは言うまでもない。 The configuration of this example in which a resin composition containing at least one of an epoxy resin and a curing accelerator is added to a plurality of cloth fibers (first cloth fiber 5 and second cloth fiber 6) is carried out. Needless to say, it can be applied not only to the configuration of Example 1 but also to the configurations of the above-mentioned Examples 2 to 6.

また、本発明は上記した実施例に限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施例は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 Further, the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

１…固定子鉄心、２…固定子コイル、３…主絶縁層、４…固定子スロット、５…第一のクロス繊維、６…第二のクロス繊維、７…スロットライナー、８…含浸樹脂。 1 ... Stator iron core, 2 ... Stator coil, 3 ... Main insulating layer, 4 ... Stator slot, 5 ... First cloth fiber, 6 ... Second cloth fiber, 7 ... Slot liner, 8 ... Impregnated resin.

Claims (14)

コイル導体と、前記コイル導体の周囲に配置される主絶縁層と、前記主絶縁層の周囲に配置されるスロットライナーと、から構成される固定子コイルと、
積層された複数の鋼板で構成され、前記固定子コイルを格納する固定子スロットを有する固定子鉄心と、を備える回転電機であって、
前記主絶縁層と前記固定子スロットとの間に第一のクロス繊維と、
前記第一のクロス繊維よりも前記主絶縁層側に配置される第二のクロス繊維と、を有し、
前記固定子鉄心の軸方向において、前記第一のクロス繊維の長さは前記固定子スロットの長さよりも短く、前記第二のクロス繊維の長さは前記固定子スロットの長さ以上であることを特徴とする回転電機。 A stator coil composed of a coil conductor, a main insulating layer arranged around the coil conductor, and a slot liner arranged around the main insulating layer.
A rotary electric machine comprising a stator core composed of a plurality of laminated steel plates and having a stator slot for accommodating the stator coil.
A first cross fiber between the main insulating layer and the stator slot,
It has a second cloth fiber arranged on the main insulating layer side of the first cloth fiber, and has.
In the axial direction of the stator core, the length of the first cross fiber is shorter than the length of the stator slot, and the length of the second cross fiber is equal to or larger than the length of the stator slot. A rotary electric machine featuring. コイル導体と、前記コイル導体の周囲に配置される主絶縁層と、前記主絶縁層の周囲に配置されるスロットライナーと、から構成される固定子コイルと、A stator coil composed of a coil conductor, a main insulating layer arranged around the coil conductor, and a slot liner arranged around the main insulating layer.
積層された複数の鋼板で構成され、前記固定子コイルを格納する固定子スロットを有する固定子鉄心と、を備える回転電機であって、A rotary electric machine comprising a stator core composed of a plurality of laminated steel plates and having a stator slot for accommodating the stator coil.
前記主絶縁層と前記固定子スロットとの間に第一のクロス繊維と、A first cross fiber between the main insulating layer and the stator slot,
前記第一のクロス繊維よりも前記主絶縁層側に配置される第二のクロス繊維と、を有し、It has a second cloth fiber arranged on the main insulating layer side of the first cloth fiber, and has.
前記固定子鉄心の軸方向において、前記第一のクロス繊維の長さは前記固定子スロットの長さよりも長く、前記第二のクロス繊維の長さは前記固定子スロットの長さ以下であることを特徴とする回転電機。In the axial direction of the stator core, the length of the first cross fiber is longer than the length of the stator slot, and the length of the second cross fiber is equal to or less than the length of the stator slot. A rotary electric machine featuring. 請求項１に記載の回転電機であって、
前記第一のクロス繊維および前記第二のクロス繊維は、前記主絶縁層と前記スロットライナーの間に配置されることを特徴とする回転電機。 The rotary electric machine according to claim 1 .
A rotary electric machine characterized in that the first cloth fiber and the second cloth fiber are arranged between the main insulating layer and the slot liner. 請求項２に記載の回転電機であって、
前記第一のクロス繊維および前記第二のクロス繊維は、前記主絶縁層と前記スロットライナーの間に配置されることを特徴とする回転電機。 The rotary electric machine according to claim 2 .
A rotary electric machine characterized in that the first cloth fiber and the second cloth fiber are arranged between the main insulating layer and the slot liner. 請求項１に記載の回転電機であって、
前記第一のクロス繊維および前記第二のクロス繊維は、前記スロットライナーと前記固定子スロットの間に配置されることを特徴とする回転電機。 The rotary electric machine according to claim 1 .
A rotary electric machine characterized in that the first cloth fiber and the second cloth fiber are arranged between the slot liner and the stator slot. 請求項２に記載の回転電機であって、
前記第一のクロス繊維および前記第二のクロス繊維は、前記スロットライナーと前記固定子スロットの間に配置されることを特徴とする回転電機。 The rotary electric machine according to claim 2 .
A rotary electric machine characterized in that the first cloth fiber and the second cloth fiber are arranged between the slot liner and the stator slot. 請求項１から６のいずれか１項に記載の回転電機であって、
前記第一のクロス繊維および前記第二のクロス繊維の少なくともいずれか一方に、エポキシ樹脂を含むことを特徴とする回転電機。 The rotary electric machine according to any one of claims 1 to 6 .
A rotary electric machine comprising an epoxy resin in at least one of the first cloth fiber and the second cloth fiber. 請求項１から６のいずれか１項に記載の回転電機であって、
前記第一のクロス繊維および前記第二のクロス繊維の少なくともいずれか一方に、硬化促進剤を含むことを特徴とする回転電機。 The rotary electric machine according to any one of claims 1 to 6 .
A rotary electric machine characterized in that at least one of the first cloth fiber and the second cloth fiber contains a curing accelerator. 以下の工程を含む回転電機の製造方法；
（ａ）コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回し固定子コイルを形成する工程、
（ｂ）前記固定子コイルの周囲に、固定子鉄心の軸方向において固定子鉄心のスロットの長さよりも短い第一のクロス繊維と前記スロットの長さ以上である第二のクロス繊維を配置する工程、
（ｃ）前記（ｂ）工程の後、前記固定子コイルを前記スロット内に収納する工程、
（ｄ）前記固定子コイルを前記スロット内に収納した状態で、真空加圧下で含浸樹脂を前記スロット内に注入する工程、
（ｅ）前記（ｄ）工程の後、前記スロット内に注入した含浸樹脂を静止乾燥により加熱硬化する工程。 Manufacturing method of rotary electric machine including the following steps;
(A) A step of winding mica tape composed of at least mica and a base material around a coil conductor to form a stator coil.
(B) Around the stator coil, a first cross fiber shorter than the slot length of the stator core in the axial direction of the stator core and a second cross fiber having a length equal to or longer than the slot length are arranged. Process,
(C) After the step (b), the step of accommodating the stator coil in the slot ,
(D) A step of injecting an impregnated resin into the slot under vacuum pressurization with the stator coil housed in the slot.
(E) A step of heating and curing the impregnated resin injected into the slot by static drying after the step (d). 以下の工程を含む回転電機の製造方法；Manufacturing method of rotary electric machine including the following steps;
（ａ）コイル導体の周囲に少なくともマイカと基材から構成されるマイカテープを巻回し固定子コイルを形成する工程、(A) A step of winding mica tape composed of at least mica and a base material around a coil conductor to form a stator coil.
（ｂ）前記固定子コイルの周囲に、固定子鉄心の軸方向において固定子鉄心のスロットの長さよりも長い第一のクロス繊維と前記スロットの長さ以下である第二のクロス繊維を配置する工程、(B) Around the stator coil, a first cross fiber longer than the slot length of the stator core in the axial direction of the stator core and a second cross fiber having a length equal to or less than the slot length are arranged. Process,
（ｃ）前記（ｂ）工程の後、前記固定子コイルを前記スロット内に収納する工程、(C) After the step (b), the step of accommodating the stator coil in the slot,
（ｄ）前記固定子コイルを前記スロット内に収納した状態で、真空加圧下で含浸樹脂を前記スロット内に注入する工程、(D) A step of injecting an impregnated resin into the slot under vacuum pressurization with the stator coil housed in the slot.
（ｅ）前記（ｄ）工程の後、前記スロット内に注入した含浸樹脂を静止乾燥により加熱硬化する工程。(E) A step of heating and curing the impregnated resin injected into the slot by static drying after the step (d). 請求項９に記載の回転電機の製造方法であって、
前記第二のクロス繊維は、前記第一のクロス繊維よりも前記固定子コイル側に配置されることを特徴とする回転電機の製造方法。 The method for manufacturing a rotary electric machine according to claim 9 .
A method for manufacturing a rotary electric machine, wherein the second cross fiber is arranged on the stator coil side of the first cross fiber . 請求項１０に記載の回転電機の製造方法であって、
前記第二のクロス繊維は、前記第一のクロス繊維よりも前記固定子コイル側に配置されることを特徴とする回転電機の製造方法。 The method for manufacturing a rotary electric machine according to claim 10.
A method for manufacturing a rotary electric machine, wherein the second cross fiber is arranged on the stator coil side of the first cross fiber . 請求項９から１２のいずれか１項に記載の回転電機の製造方法であって、
前記第一のクロス繊維および前記第二のクロス繊維の少なくともいずれか一方に、エポキシ樹脂を含むことを特徴とする回転電機の製造方法。 The method for manufacturing a rotary electric machine according to any one of claims 9 to 12.
A method for manufacturing a rotary electric machine, characterized in that at least one of the first cloth fiber and the second cloth fiber contains an epoxy resin. 請求項９から１２のいずれか１項に記載の回転電機の製造方法であって、
前記第一のクロス繊維および前記第二のクロス繊維の少なくともいずれか一方に、硬化促進剤を含むことを特徴とする回転電機の製造方法。 The method for manufacturing a rotary electric machine according to any one of claims 9 to 12.
A method for manufacturing a rotary electric machine, characterized in that at least one of the first cloth fiber and the second cloth fiber contains a curing accelerator.
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