JP5762638B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JP5762638B2
JP5762638B2 JP2014527922A JP2014527922A JP5762638B2 JP 5762638 B2 JP5762638 B2 JP 5762638B2 JP 2014527922 A JP2014527922 A JP 2014527922A JP 2014527922 A JP2014527922 A JP 2014527922A JP 5762638 B2 JP5762638 B2 JP 5762638B2
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Prior art keywords
varnish
concentrated winding
winding coil
teeth
coil
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JPWO2014020755A1 (en
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穣 井倉
穣 井倉
大賀　琢也
琢也 大賀
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • 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
    • H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • 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
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/12—Machines characterised by the bobbins for supporting the windings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Description

この発明は、例えば、電動機や発電機に適用される回転電機に関し、特にステータコイルへのワニスの含浸構造に関するものである。   The present invention relates to a rotating electrical machine applied to, for example, an electric motor or a generator, and more particularly to a structure for impregnating a varnish into a stator coil.

従来の回転電機では、ステータコアを水平に保持し、ステータコアから突出する上側コイルエンドの内周側面および外周側面に、ステータコアの上端面との間をシールするシール部材を筒状に配設し、その後、上側コイルエンドの上面からワニスを注入して、上側コイルエンドの上から下へワニスを含浸流下させていた（例えば、特許文献１参照）。   In conventional rotating electrical machines, the stator core is held horizontally, and seal members that seal the gap between the upper end surface of the stator core are arranged in a cylindrical shape on the inner peripheral side surface and outer peripheral side surface of the upper coil end protruding from the stator core, and thereafter The varnish was injected from the upper surface of the upper coil end, and the varnish was impregnated and flowed downward from the upper coil end (see, for example, Patent Document 1).

特開２００８−１０９７３３号公報JP 2008-109733 A

従来の回転電機では、上側コイルエンドの上面から注入されたワニスは、露出する上側コイルエンドの外周面に沿って流下し、シール部材により内径側および外径側への流出を阻止されて、スロット内を通って流下する。ワニスは、露出する上側コイルエンドの外周面に沿って流下する過程で、上側コイルエンドの外周面から毛細管現象で上側コイルエンド内に含浸される。しかし、ワニスは、ステータコアの上端面に面する上側コイルエンドの内周面から含浸しにくく、上側コイルエンドのワニス含浸率が高められないという課題があった。   In the conventional rotating electric machine, the varnish injected from the upper surface of the upper coil end flows down along the outer peripheral surface of the exposed upper coil end, and is prevented from flowing out to the inner diameter side and the outer diameter side by the seal member. It flows down through the inside. The varnish is impregnated in the upper coil end by capillary action from the outer peripheral surface of the upper coil end in the process of flowing down along the outer peripheral surface of the exposed upper coil end. However, the varnish is difficult to impregnate from the inner peripheral surface of the upper coil end facing the upper end surface of the stator core, and there is a problem that the varnish impregnation rate of the upper coil end cannot be increased.

この発明は、上記課題を解決するためになされたもので、コイルエンドの内周面からのワニスの含浸を促進して、コイルエンドのワニス含浸率を高めた回転電機を得ることを目的とする。   SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a rotating electrical machine that promotes varnish impregnation from the inner peripheral surface of a coil end and increases the varnish impregnation rate of the coil end. .

この発明に係る回転電機は、円環状のステータコア、および該ステータコアの各ティースに巻装された集中巻コイルを有するステータと、ロータと、を備えている。胴部、および該胴部の上面の長さ方向の両端に突設された一対のガイド部を有する樹脂製のボビンが、それぞれ、該胴部の長さ方向を上記ティースの径方向に一致させて、該胴部の底面を該ティースの軸方向両端面に沿わせて配置され、上記集中巻コイルが、導体線を、上記ティースの軸方向両端の上記胴部と上記一対のガイド部とにより形成される凹空間内を通って、該ティースのまわりを所定回巻回させて構成されている。さらに、ワニス溜め溝が、溝方向を上記胴部の長さ方向として、該胴部の上面に凹設されて上記一対のガイド部間に延在し、切り欠きが、上記一対のガイド部の相対する壁面の一方に、当該ガイド部の突出端から根元部に至り、上記ワニス溜め溝に接続されるように形成され、ワニスが、上記集中巻コイルの上記胴部の軸方向外側の部分に含浸されているとともに、上記ワニス溜め溝および上記胴部の上面と上記集中巻コイルとの間に充填されている。   A rotating electrical machine according to the present invention includes an annular stator core, a stator having concentrated winding coils wound around each tooth of the stator core, and a rotor. A resin-made bobbin having a trunk portion and a pair of guide portions protruding at both ends in the longitudinal direction of the upper surface of the trunk portion respectively matches the length direction of the trunk portion with the radial direction of the teeth. Then, the bottom surface of the body portion is arranged along both end surfaces in the axial direction of the teeth, and the concentrated winding coil has a conductor wire formed by the body portion and the pair of guide portions at both ends in the axial direction of the teeth. It is configured by winding a predetermined number of times around the teeth through the formed concave space. Further, the varnish reservoir groove is recessed in the upper surface of the barrel portion with the groove direction as the length direction of the barrel portion and extends between the pair of guide portions, and a notch is formed between the pair of guide portions. It is formed on one of the opposing wall surfaces from the protruding end of the guide part to the root part and connected to the varnish reservoir groove, and the varnish is formed on the axially outer part of the trunk part of the concentrated winding coil. It is impregnated and filled between the varnish reservoir groove and the upper surface of the body portion and the concentrated winding coil.

この発明によれば、ワニスがワニス溜め溝および胴部の上面と集中巻コイルとの間に充填されているので、胴部の上面に面する集中巻コイルの内周面からのワニスの含浸が促進され、集中巻コイルのワニス含浸率が高められる。   According to this invention, since the varnish is filled between the varnish reservoir groove and the upper surface of the body portion and the concentrated winding coil, the impregnation of the varnish from the inner peripheral surface of the concentrated winding coil facing the upper surface of the body portion is performed. This increases the varnish impregnation rate of the concentrated winding coil.

この発明の実施の形態１に係る回転電機を示す縦断面図である。It is a longitudinal cross-sectional view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機を示す一部破断端面図である。It is a partially broken end view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. 図２のＩＩＩ−ＩＩＩ矢視断面図である。FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. この発明の実施の形態１に係る回転電機におけるコイルアッセンブリを示す斜視図である。It is a perspective view which shows the coil assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機におけるコイルアッセンブリに組み込まれるボビンを示す斜視図である。It is a perspective view which shows the bobbin integrated in the coil assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機におけるコアアッセンブリを示す斜視図である。It is a perspective view which shows the core assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機におけるコアアッセンブリを示す分解斜視図である。It is a disassembled perspective view which shows the core assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態２に係る回転電機におけるコイルアッセンブリに組み込まれるボビンを示す斜視図である。It is a perspective view which shows the bobbin integrated in the coil assembly in the rotary electric machine which concerns on Embodiment 2 of this invention. この発明の実施の形態３に係る回転電機における固定子を示す端面図である。It is an end elevation which shows the stator in the rotary electric machine which concerns on Embodiment 3 of this invention. 図９のＸ−Ｘ矢視断面図である。It is XX arrow sectional drawing of FIG. この発明の実施の形態３に係る回転電機におけるコイルアッセンブリを示す斜視図である。It is a perspective view which shows the coil assembly in the rotary electric machine which concerns on Embodiment 3 of this invention. この発明の実施の形態３に係る回転電機におけるコイルアッセンブリに組み込まれるボビンを示す斜視図である。It is a perspective view which shows the bobbin integrated in the coil assembly in the rotary electric machine which concerns on Embodiment 3 of this invention.

以下、本発明の回転電機の好適な実施の形態につき図面を用いて説明する。   Hereinafter, preferred embodiments of a rotating electrical machine of the present invention will be described with reference to the drawings.

実施の形態１．
図１はこの発明の実施の形態１に係る回転電機を示す縦断面図、図２はこの発明の実施の形態１に係る回転電機を示す一部破断端面図、図３は図２のＩＩＩ−ＩＩＩ矢視断面図、図４はこの発明の実施の形態１に係る回転電機におけるコイルアッセンブリを示す斜視図、図５はこの発明の実施の形態１に係る回転電機におけるコイルアッセンブリに組み込まれるボビンを示す斜視図、図６はこの発明の実施の形態１に係る回転電機におけるコアアッセンブリを示す斜視図、図７はこの発明の実施の形態１に係る回転電機におけるコアアッセンブリを示す分解斜視図である。なお、縦断面図とは回転電機の軸心を含む断面図である。Embodiment 1 FIG.
1 is a longitudinal sectional view showing a rotating electrical machine according to Embodiment 1 of the present invention, FIG. 2 is a partially broken end view showing the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. FIG. 4 is a perspective view showing a coil assembly in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 5 is a perspective view showing a bobbin incorporated in the coil assembly in the rotary electric machine according to Embodiment 1 of the present invention. FIG. 6 is a perspective view showing a core assembly in a rotary electric machine according to Embodiment 1 of the present invention, and FIG. 7 is an exploded perspective view showing the core assembly in the rotary electric machine according to Embodiment 1 of the present invention. . Note that the longitudinal sectional view is a sectional view including the axis of the rotating electrical machine.

図１乃至図３において、回転電機１００は、フレーム１に回転可能に支持されたシャフト４と、シャフト４に固定されてフレーム１内に回転可能に配設されたロータ２と、円環状のステータコア９、およびステータコア９に装着されたステータコイル１０を有し、ステータコア９をフレーム１に保持されて、所定のギャップを介してロータ２を囲繞するように配設されるステータ８と、を備える。   1 to 3, a rotating electrical machine 100 includes a shaft 4 rotatably supported by a frame 1, a rotor 2 fixed to the shaft 4 and rotatably disposed in the frame 1, and an annular stator core. 9 and a stator coil 10 mounted on the stator core 9, the stator core 9 being held by the frame 1, and a stator 8 disposed so as to surround the rotor 2 via a predetermined gap.

ロータ２は、例えば、所定形状に打ち抜かれた電磁鋼板を積層一体化して作製されたロータコア３と、ロータコア３の軸心位置を貫通するように形成されたシャフト挿通穴６に圧入、固定されたシャフト４と、それぞれロータコア３を貫通するように形成され、同一円周上に等角ピッチで配列された８つの磁石挿入穴７のそれぞれに挿入された永久磁石５と、を備える。   The rotor 2 is press-fitted and fixed in, for example, a rotor core 3 manufactured by laminating and integrating electromagnetic steel plates punched into a predetermined shape, and a shaft insertion hole 6 formed so as to penetrate the axial center position of the rotor core 3. The shaft 4 is provided with permanent magnets 5 that are formed so as to penetrate the rotor core 3 and that are respectively inserted into eight magnet insertion holes 7 that are arranged at an equiangular pitch on the same circumference.

ステータコア９は、１２個のコア片１１から構成されている。つまり、コア片１１は、ステータコア９を周方向に１２等分割した形状に形成されている。コア片１１は、例えば、同一形状に打ち抜かれた多数枚の電磁鋼板を積層一体化して作製され、円弧形のコアバック部１２と、コアバック部１２の内周面の周方向中央から径方向内方に延設されたティース１３と、ティース１３の延出端から周方向両側に延設された鍔部１４と、を有する。   The stator core 9 is composed of 12 core pieces 11. That is, the core piece 11 is formed in a shape obtained by dividing the stator core 9 into 12 equal parts in the circumferential direction. The core piece 11 is produced, for example, by laminating and integrating a large number of electromagnetic steel sheets punched into the same shape, and has a diameter from the center in the circumferential direction of the arc-shaped core back portion 12 and the inner peripheral surface of the core back portion 12. The teeth 13 extend inward in the direction, and the flanges 14 extend from the extending end of the teeth 13 to both sides in the circumferential direction.

コイルアッセンブリ１６は、図４に示されるように、一対のボビン２０をコア片１１の軸方向の両側からコア片１１の端面に配設し、かつ一対の絶縁紙２８をコア片１１の周方向の両側からコア片１１の側面に配設して構成されるコアアッセンブリ３２と、コア片１１のティース１３と一対のボビン２０とのまわりに導体線３３を所定回巻回して作製された集中巻コイル１５と、を備える。ここで、導体線３３は、絶縁被覆された断面円形の銅丸線やアルミ丸線を用いている。   As shown in FIG. 4, the coil assembly 16 includes a pair of bobbins 20 disposed on the end surface of the core piece 11 from both sides in the axial direction of the core piece 11, and a pair of insulating papers 28 in the circumferential direction of the core piece 11. Concentrated winding produced by winding the conductor wire 33 around the core assembly 32 arranged on the side surface of the core piece 11 from both sides of the core piece 11, the tooth 13 of the core piece 11 and the pair of bobbins 20. A coil 15. Here, as the conductor wire 33, a copper round wire or an aluminum round wire having a circular cross section with insulation coating is used.

ボビン２０は、例えばポリフェニレンサルファイド（ＰＰＳ）樹脂を用いた樹脂成型体である。ボビン２０は、図５に示されるように、長さ方向と直交する断面を上部側の両角部にアール加工を施した略矩形とし、長さ方向をティース１３の径方向に一致させて、底面をティース１３の軸方向の両端面に沿うように配設される胴部２１と、胴部２１の上面の長さ方向一側から底面と反対側（ティース１３と反対側）に延出する第１ガイド部２２と、胴部２１の上面の長さ方向他側から第１ガイド部２２と相対して底面と反対側に延出する第２ガイド部２３と、胴部２１、第１ガイド部２２および第２ガイド部２３の幅方向の両端部から胴部２１の上面と反対側に所定長さ延出する薄肉のスカート部２４と、を有する。   The bobbin 20 is a resin molding using, for example, polyphenylene sulfide (PPS) resin. As shown in FIG. 5, the bobbin 20 has a cross section orthogonal to the length direction as a substantially rectangular shape in which both corners on the upper side are rounded, and the length direction coincides with the radial direction of the teeth 13. The body portion 21 is disposed so as to extend along both end surfaces of the teeth 13 in the axial direction, and the first portion extends from one side in the length direction of the upper surface of the body portion 21 to the side opposite to the bottom surface (the side opposite to the teeth 13). A first guide part 22; a second guide part 23 extending from the other side in the longitudinal direction of the upper surface of the body part 21 to the opposite side of the bottom surface relative to the first guide part 22; the body part 21, the first guide part; 22 and a thin skirt portion 24 extending a predetermined length from both ends in the width direction of the second guide portion 23 to the opposite side of the upper surface of the body portion 21.

導体線３３を挿通するための一対のスリット２５が第２ガイド部２３に形成されている。ワニス溜め溝２６が、断面矩形の溝形状で、胴部２１の上面の幅方向の中央に長さ方向一側から他側に至るように凹設されている。ワニス注入用の切り欠き２７が、第２ガイド部２３の幅方向の中央に、かつ第２ガイド部２３を胴部２１の長さ方向に貫通して、第２ガイド部２３の延出端から根元側に至り、ワニス溜め溝２６に接続されるように形成されている。切り欠き２７の底面は、胴部２１の長さ方向の他端から一端側に向かって漸次深くなって、ワニス溜め溝２６の底面に段差なく接続される傾斜面となっている。   A pair of slits 25 for inserting the conductor wire 33 is formed in the second guide portion 23. The varnish reservoir groove 26 has a rectangular cross-sectional shape, and is recessed at the center of the upper surface of the body portion 21 in the width direction so as to extend from one side in the length direction to the other side. A notch 27 for varnish injection penetrates the second guide portion 23 in the center of the width direction of the second guide portion 23 in the length direction of the trunk portion 21, and extends from the extended end of the second guide portion 23. It is formed so as to reach the root side and be connected to the varnish reservoir groove 26. The bottom surface of the cutout 27 gradually becomes deeper from the other end in the length direction of the body portion 21 toward one end side, and is an inclined surface connected to the bottom surface of the varnish reservoir groove 26 without a step.

絶縁紙２８は、例えばポリイミドフィルムをメタ系アラミド繊維で挟み込んで作製されたシートをプレス成形して形成される。絶縁紙２８は、図７に示されるように、コア片１１のコアバック部１２、ティース１３および鍔部１４のスロットを画成する壁面に宛がわれる保護部２９と、折り返されて集中巻コイル１５を覆う第１および第２カバー部３０，３１と、を有する。   The insulating paper 28 is formed, for example, by press-molding a sheet produced by sandwiching a polyimide film with meta-aramid fibers. As shown in FIG. 7, the insulating paper 28 includes a protection portion 29 that is addressed to a wall surface that defines a slot of the core back portion 12, the teeth 13, and the flange portion 14 of the core piece 11, and a concentrated winding coil that is folded back. 15 and first and second cover portions 30 and 31 covering 15.

そして、絶縁紙２８が、コア片１１の周方向両側から、保護部２９をコアバック部１２、ティース１３および鍔部１４のスロットを画成する壁面に宛がわれるように配設され、ボビン２０が、コア片１１の軸方向両側から、胴部２１の長さ方向をティース１３の径方向に一致させて、コア片１１の端面に胴部２１の底面を沿わせて配設される。これにより、図６に示されるコアアッセンブリ３２が組立てられる。   The insulating paper 28 is disposed from both sides in the circumferential direction of the core piece 11 so that the protective portion 29 is directed to the wall surface defining the slots of the core back portion 12, the teeth 13 and the flange portion 14. However, from both sides in the axial direction of the core piece 11, the length direction of the body portion 21 is made to coincide with the radial direction of the teeth 13, and the bottom surface of the body portion 21 is disposed along the end surface of the core piece 11. Thereby, the core assembly 32 shown in FIG. 6 is assembled.

ここで、ボビン２０は、スカート部２４が、コアバック部１２、ティース１３および鍔部１４のスロットを画成する壁面と所定の隙間を持って相対するように延在して、ティース１３の軸方向の端面の全面を覆うように配設されている。絶縁紙２８は、保護部２９の両端が、コアバック部１２、ティース１３および鍔部１４のスロットを画成する壁面とスカート部２４との間に挿入されて、コア片１１の周方向両側に配設されている。   Here, the bobbin 20 extends so that the skirt portion 24 faces a wall surface defining the slots of the core back portion 12, the teeth 13, and the collar portion 14 with a predetermined gap, and the axis of the teeth 13 is extended. It arrange | positions so that the whole surface of a direction end surface may be covered. The insulating paper 28 is inserted between the skirt portion 24 and the wall surface defining the slots of the core back portion 12, the teeth 13, and the collar portion 14 at both ends of the protection portion 29, so It is arranged.

そして、導体線３３が、一方のスリット２５から第１ガイド部２２と第２ガイド部２３との間に引き入れられて、コア片１１のティース１３とその軸方向の両端に配された一対の胴部２１とのまわりに所定回巻回された後、他方のスリット２５から引き出される。これにより、集中巻コイル１５がコアアッセンブリ３２に巻装されたコイルアッセンブリ１６が作製される。このコイルアッセンブリ１６は、絶縁紙２８の第１および第２カバー部３０，３１が折り返され、図４に示される状態となる。   And the conductor wire 33 is drawn in between the 1st guide part 22 and the 2nd guide part 23 from one slit 25, and the pair of trunk | drum arrange | positioned at the teeth 13 of the core piece 11, and the both ends of the axial direction After being wound around the portion 21 a predetermined number of times, it is pulled out from the other slit 25. Thereby, the coil assembly 16 in which the concentrated winding coil 15 is wound around the core assembly 32 is produced. In the coil assembly 16, the first and second cover portions 30 and 31 of the insulating paper 28 are folded back, and the state shown in FIG. 4 is obtained.

このように構成されたコイルアッセンブリ１６を、コア片１１のコアバック部１２の周方向の端面同士を突き合わせて、周方向に環状に配列して、円環状のリング部１７に圧入、固着して、あるいは焼き嵌めによりリング部１７内に挿入、固着して、ステータ８が構成される。   The coil assembly 16 configured in this manner is aligned with the circumferential end faces of the core back portion 12 of the core piece 11 in an annular shape, and is press-fitted and fixed to the annular ring portion 17. Alternatively, the stator 8 is configured by being inserted and fixed into the ring portion 17 by shrink fitting.

ここで、コア片１１がコアバック部１２の周方向の端面同士を突き合わせて円環状に配列されてステータコア９を構成している。また、コアバック部１２が周方向に連結してステータコア９のコアバックを構成し、コアバックと隣り合うティース１３とにより形成される空間がスロットを構成する。また、コア片１１のティース１３に巻回された１２本の集中巻コイル１５によりステータコイル１０が構成される。そして、集中巻コイル１５のステータコア９から軸方向外方に突出する部分が、ステータコイル１０のコイルエンドを構成する。   Here, the core pieces 11 are arranged in an annular shape by abutting the end faces in the circumferential direction of the core back portion 12 to constitute the stator core 9. Further, the core back portion 12 is connected in the circumferential direction to form a core back of the stator core 9, and a space formed by the core back and the adjacent teeth 13 forms a slot. In addition, the stator coil 10 is configured by twelve concentrated winding coils 15 wound around the teeth 13 of the core piece 11. A portion of the concentrated winding coil 15 that protrudes outward in the axial direction from the stator core 9 constitutes a coil end of the stator coil 10.

このように構成されたステータ８は、図示していないが、軸方向を鉛直として水平に保持される。そして、大径の筒状のシール部材がそれぞれのボビン２０の第２ガイド部２３の外径側の面に接するようにステータコア９の上端面に配置され、小径の筒状のシール部材がそれぞれのボビン２０の第１ガイド部２２の内径側の面に接するようにステータコア９の上端面に配置される。さらに、ワニス３４が、鉛直方向上方から、ステータコア９の軸方向外方に突出する集中巻コイル１５の部分に滴下される。ワニス３４は、集中巻コイル１５の露出する外周面に沿って流下し、シール部材により内径側および外径側への流出を阻止されて、スロット内を通って流下する。また、ワニス３４の一部が、切り欠き２７を通ってワニス溜め溝２６に充填される。 Although not shown, the stator 8 configured in this way is held horizontally with the axial direction vertical. The large-diameter cylindrical seal member is arranged on the upper end surface of the stator core 9 so as to be in contact with the outer diameter side surface of the second guide portion 23 of each bobbin 20, and the small-diameter cylindrical seal members are respectively The bobbin 20 is disposed on the upper end surface of the stator core 9 so as to contact the inner diameter side surface of the first guide portion 22 of the bobbin 20. Further, the varnish 34 is dropped from the upper part in the vertical direction onto the portion of the concentrated winding coil 15 that protrudes outward in the axial direction of the stator core 9. The varnish 34 flows down along the exposed outer peripheral surface of the concentrated winding coil 15, is prevented from flowing out to the inner diameter side and the outer diameter side by the seal member, and flows down through the slot. A part of the varnish 34 passes through the notch 27 and fills the varnish reservoir groove 26.

そして、ワニス３４は、集中巻コイル１５の露出する外周面に沿って流下する過程で、集中巻コイル１５の外周面から毛細管現象で集中巻コイル１５内に含浸される。一方、ワニス溜め溝２６内に充填されたワニス３４が、集中巻コイル１５の内周面に接し、集中巻コイル１５の内周面から毛細管現象で集中巻コイル１５内に含浸される。さらに、ワニス溜め溝２６内に充填されたワニス３４が、毛細管現象で集中巻コイル１５の内周面と胴部２１の上面との間に含浸され、胴部２１の上面に面する集中巻コイル１５の内周面から集中巻コイル１５内に含浸される。   The varnish 34 is impregnated in the concentrated winding coil 15 by capillary action from the outer peripheral surface of the concentrated winding coil 15 in the process of flowing down along the exposed outer peripheral surface of the concentrated winding coil 15. On the other hand, the varnish 34 filled in the varnish reservoir groove 26 is in contact with the inner peripheral surface of the concentrated winding coil 15 and is impregnated into the concentrated winding coil 15 from the inner peripheral surface of the concentrated winding coil 15 by capillary action. Further, the varnish 34 filled in the varnish reservoir groove 26 is impregnated between the inner peripheral surface of the concentrated winding coil 15 and the upper surface of the trunk portion 21 by capillary action, and the concentrated winding coil facing the upper surface of the trunk portion 21. The concentrated winding coil 15 is impregnated from the inner peripheral surface of 15.

ついで、ステータ８の上下を反転させ、同様に、ワニス３４を集中巻コイル１５に含浸させる。そして、集中巻コイル１５に含浸されたワニス３４およびワニス溜め溝２６内に充填されたワニス３４が硬化し、集中巻コイル１５がボビン２０に固着される。   Next, the stator 8 is turned upside down, and similarly, the concentrated winding coil 15 is impregnated with the varnish 34. The varnish 34 impregnated in the concentrated winding coil 15 and the varnish 34 filled in the varnish reservoir groove 26 are cured, and the concentrated winding coil 15 is fixed to the bobbin 20.

このように構成された回転電機１００は、外部電源からステータ８の軸方向一端側に配設された円環状の配電部材４０を介してステータコイル１０に給電され、８極１２スロットのインナーロータ型の同期電動機として動作する。   The rotating electrical machine 100 configured as described above is fed with power to the stator coil 10 from an external power source via an annular power distribution member 40 disposed on one end side of the stator 8 in the axial direction, and is an 8-pole 12-slot inner rotor type. It operates as a synchronous motor.

この実施の形態１によれば、集中巻コイル１５が、ティース１３の軸方向両端に配置されたボビン２０の胴部２１、第１ガイド部２２および第２ガイド部２３により形成される凹空間内を通るように巻装されている。そして、ワニス溜め溝２６が胴部２１の上面に長さ方向に延在するように凹設され、切り欠き２７がワニス溜め溝２６の溝方向の他端に連結するように第２ガイド部２３に形成されている。そこで、ワニス３４の含浸工程において、ワニス３４が、集中巻コイル１５の露出する外周面とワニス溜め溝２６に面する内周面とから含浸されるので、ステータコイル１０のコイルエンドのワニス含浸率が高められる。   According to the first embodiment, the concentrated winding coil 15 is in a concave space formed by the body portion 21, the first guide portion 22, and the second guide portion 23 of the bobbin 20 disposed at both axial ends of the teeth 13. It is wound to pass through. The second guide portion 23 is recessed so that the varnish reservoir groove 26 extends in the length direction on the upper surface of the body portion 21 and the notch 27 is connected to the other end of the varnish reservoir groove 26 in the groove direction. Is formed. Therefore, in the impregnation step of the varnish 34, the varnish 34 is impregnated from the exposed outer peripheral surface of the concentrated winding coil 15 and the inner peripheral surface facing the varnish reservoir groove 26, so that the varnish impregnation rate of the coil end of the stator coil 10 is increased. Is increased.

そこで、集中巻コイル１５での発熱がボビン２０を介してステータコア９に伝達され、さらにリング部１７に伝達され、リング部１７から放熱されるので、集中巻コイル１５の過度の温度上昇が抑えられる。また、集中巻コイル１５がボビン２０に固着されるので、集中巻コイル１５が車両の振動で動いて、ボビン２０から外れたり、コア片１１と擦れて絶縁不良を引き起こす事態が阻止される。
切り欠き２７が外径側の第２ガイド部２３に形成されているので、ワニス注入時の作業スペースが広くなり、ワニス注入作業性が向上する。Therefore, the heat generated in the concentrated winding coil 15 is transmitted to the stator core 9 via the bobbin 20, and further transmitted to the ring portion 17 and radiated from the ring portion 17, so that an excessive temperature rise in the concentrated winding coil 15 can be suppressed. . Further, since the concentrated winding coil 15 is fixed to the bobbin 20, it is possible to prevent the concentrated winding coil 15 from moving due to the vibration of the vehicle and coming off from the bobbin 20 or rubbing against the core piece 11 to cause insulation failure.
Since the notch 27 is formed in the second guide portion 23 on the outer diameter side, the work space at the time of varnish injection is widened, and the varnish injection workability is improved.

切り欠き２７の底面が、胴部２１の長さ方向の他端から一端側に向かって漸次深くなって、ワニス溜め溝２６の底面に段差なく接続される傾斜面となっているので、切り欠き２７の底面が、切り欠き２７に流れ込んできたワニス３４をワニス溜め溝２６に送り込むように作用する。そこで、ワニス溜め溝２６内のワニス３４の量が常に確保され、ワニス３４が効率的に集中巻コイル１５内に含浸される。
導体線３３が円形断面であるので、ワニス３４が集中巻コイル１５に効率的に含浸される。Since the bottom surface of the cutout 27 gradually becomes deeper from the other end in the length direction of the body portion 21 toward the one end side and becomes an inclined surface connected to the bottom surface of the varnish reservoir groove 26 without a step, the cutout The bottom surface of 27 acts to feed the varnish 34 that has flowed into the notch 27 into the varnish reservoir groove 26. Therefore, the amount of the varnish 34 in the varnish reservoir groove 26 is always ensured, and the varnish 34 is efficiently impregnated in the concentrated winding coil 15.
Since the conductor wire 33 has a circular cross section, the concentrated winding coil 15 is efficiently impregnated with the varnish 34.

なお、上記実施の形態１では、切り欠き２７の底面が傾斜面に形成されているものとしているが、切り欠き２７の底面は傾斜面に限定されず、切り欠き２７の根元側がワニス溜め溝２６に接続されていればよく、例えば、切り欠き２７の底面をワニス溜め溝２６の底面と平行な平坦面に形成してもよい。この場合、切り欠き２７に導かれたワニス３４をワニス溜め溝２６内に供給する観点から、切り欠き２７の底面と胴部２１の底面（ティース１３の端面）との間の距離を、胴部２１の上面と胴部２１の底面との間の距離より短く、かつワニス溜め溝２６の底面と胴部２１の底面との間の距離と等しく、又は長くすることが好ましい。また、切り欠き２７の底面と胴部２１の底面との間の距離がワニス溜め溝２６に向かってステップ状に短くなるように切り欠き２７の底面を形成してもよい。この場合も、切り欠き２７に導かれたワニス３４をワニス溜め溝２６内に供給する観点から、切り欠き２７のワニス溜め溝２６の底面に接続される底面部分と胴部２１の底面との間の距離を、胴部２１の上面と胴部２１の底面との間の距離より短く、かつワニス溜め溝２６の底面と胴部２１の底面との間の距離と等しく、又は長くすることが好ましい。   In the first embodiment, the bottom surface of the notch 27 is formed as an inclined surface. However, the bottom surface of the notch 27 is not limited to the inclined surface, and the base side of the notch 27 is the varnish reservoir groove 26. For example, the bottom surface of the notch 27 may be formed on a flat surface parallel to the bottom surface of the varnish reservoir groove 26. In this case, from the viewpoint of supplying the varnish 34 guided to the notch 27 into the varnish accumulating groove 26, the distance between the bottom surface of the notch 27 and the bottom surface of the trunk portion 21 (end surface of the teeth 13) is defined as the trunk portion. It is preferable that the distance is shorter than the distance between the upper surface of the body 21 and the bottom surface of the body portion 21 and equal to or longer than the distance between the bottom surface of the varnish reservoir groove 26 and the bottom surface of the body portion 21. Further, the bottom surface of the notch 27 may be formed so that the distance between the bottom surface of the notch 27 and the bottom surface of the body portion 21 is shortened stepwise toward the varnish reservoir groove 26. Also in this case, from the viewpoint of supplying the varnish 34 guided to the notch 27 into the varnish reservoir groove 26, the gap between the bottom surface portion connected to the bottom surface of the varnish reservoir groove 26 of the notch 27 and the bottom surface of the trunk portion 21. Is shorter than the distance between the upper surface of the body portion 21 and the bottom surface of the body portion 21, and is preferably equal to or longer than the distance between the bottom surface of the varnish reservoir groove 26 and the bottom surface of the body portion 21. .

実施の形態２．
図８はこの発明の実施の形態２に係る回転電機におけるコイルアッセンブリに組み込まれるボビンを示す斜視図である。Embodiment 2. FIG.
FIG. 8 is a perspective view showing a bobbin incorporated in a coil assembly in a rotary electric machine according to Embodiment 2 of the present invention.

図８において、ボビン２０Ａでは、ワニス注入用の切り欠き２７Ａが、第２ガイド部２３の第１ガイド部２２側の面（内周面）の幅方向の中央に、第２ガイド部２３の延出端から根元側に至るように形成されている。
なお、実施の形態２では、ボビン２０に替えて、ボビン２０Ａを用いている点を除いて、上記実施の形態１と同様に構成されている。In FIG. 8, in the bobbin 20A, the notch 27A for varnish injection extends to the center in the width direction of the surface (inner peripheral surface) of the second guide portion 23 on the first guide portion 22 side. It is formed so as to extend from the extended end to the root side.
The second embodiment is configured in the same manner as in the first embodiment except that the bobbin 20A is used instead of the bobbin 20.

この実施の形態２においても、ワニス３４の含浸工程において、ワニス３４が、切り欠き２７Ａからワニス溜め溝２６に充填され、集中巻コイル１５の内周面から含浸されるので、上記実施の形態１と同様の効果を奏する。   Also in the second embodiment, in the step of impregnating the varnish 34, the varnish 34 is filled into the varnish reservoir groove 26 from the notch 27A and impregnated from the inner peripheral surface of the concentrated winding coil 15. Has the same effect as.

なお、上記実施の形態１，２では、ワニス注入用の切り欠き２７，２７Ａが第２ガイド部２３に形成されているものとしているが、切り欠きはワニス溜め溝に連通するように第１ガイド部２２に形成してもよい。   In the first and second embodiments, the varnish injection notches 27 and 27A are formed in the second guide portion 23. However, the notches are communicated with the varnish reservoir groove in the first guide. The portion 22 may be formed.

実施の形態３．
図９はこの発明の実施の形態３に係る回転電機におけるステータを示す端面図、図１０は図９のＸ−Ｘ矢視断面図、図１１はこの発明の実施の形態３に係る回転電機におけるコイルアッセンブリを示す斜視図、図１２はこの発明の実施の形態３に係る回転電機におけるコイルアッセンブリに組み込まれるボビンを示す斜視図である。なお、図９では、絶縁紙が省略されている。Embodiment 3 FIG.
9 is an end view showing a stator in a rotary electric machine according to Embodiment 3 of the present invention, FIG. 10 is a cross-sectional view taken along the line XX of FIG. 9, and FIG. 11 is in the rotary electric machine according to Embodiment 3 of the present invention. FIG. 12 is a perspective view showing a coil assembly, and FIG. 12 is a perspective view showing a bobbin incorporated in a coil assembly in a rotary electric machine according to Embodiment 3 of the present invention. In FIG. 9, insulating paper is omitted.

図９および図１０において、ステータ８Ａは、コア片１１のコアバック部１２の周方向の端面同士を突き合わせて、コイルアッセンブリ１６Ａを周方向に環状に配列して、円環状のリング部１７に圧入、固着して、あるいは焼き嵌めによりリング部１７内に挿入、固着して、構成される。   9 and 10, the stator 8A is press-fitted into the annular ring portion 17 by abutting the end faces in the circumferential direction of the core back portion 12 of the core piece 11 and arranging the coil assemblies 16A in an annular shape in the circumferential direction. It is configured to be fixed or inserted into and fixed to the ring portion 17 by shrink fitting.

ボビン２０Ｂは、図１２に示されるように、一対のスリット２５に替えて、１つのスリット２５Ａが設けられている。そして、平角線からなる導体線３３Ａが、スリット２５Ａから第１ガイド部２２と第２ガイド部２３との間に引き入れられ、コア片１１のティース１３とその軸方向の両端に配された一対の胴部２１とのまわりにエッジワイズ巻きに所定回巻回された後、直角に折り曲げられて、第２ガイド部２３上を通って引き出される。その後、絶縁紙２８の第１および第２カバー部３０，３１が折り返され、集中巻コイル１５Ａが巻装されたコイルアッセンブリ１６Ａが、図１１に示されるように、作製される。
As shown in FIG. 12, the bobbin 20 </ b> B is provided with one slit 25 </ b> A instead of the pair of slits 25. And the conductor wire 33A which consists of a flat wire is drawn in between the 1st guide part 22 and the 2nd guide part 23 from the slit 25A, and a pair of teeth 13 of the core piece 11 and the axial direction both ends were arranged. After being wound around the body portion 21 by edgewise winding, it is bent at a right angle and pulled out over the second guide portion 23. Thereafter, the first and second cover portions 30 and 31 of the insulating paper 28 are folded back, and the coil assembly 16A around which the concentrated winding coil 15A is wound is produced as shown in FIG.

配電部材４０は、４つのＣ字状のバスバー収納溝４２が同心状に凹設された円環状の絶縁ホルダ４１と、バスバー収納溝４２のそれぞれに収納された、集中巻コイル１５Ａの結線用のバスバーである中性点用バスバー４３Ｎ、Ｕ相バスバー４３Ｕ、Ｖ相バスバー４３ＶおよびＷ相バスバー４３Ｗと、Ｕ相バスバー４３Ｕ、Ｖ相バスバー４３ＶおよびＷ相バスバー４３Ｗのそれぞれに連結された給電端子４４Ｕ，４４Ｖ，４４Ｗと、を備える。この配電部材４０は、絶縁ホルダ４１が周方向に配列されたボビン２０Ｂの第２ガイド部２３の外周面に接するように、ステータコア９のコアバックの軸方向一端面上に配設される。そして、各コイルアッセンブリ１６Ａから外径側に引き出された集中巻コイル１５Ａの端部が、中性点用バスバー４３Ｎ、Ｕ相バスバー４３Ｕ、Ｖ相バスバー４３ＶおよびＷ相バスバー４３Ｗの対応するバスバーに接続される。これにより、それぞれ、４つの集中巻コイル１５Ａが並列接続されたＵ相コイル、Ｖ相コイル、およびＷ相コイルをＹ結線してなるステータコイル１０Ａが構成される。   The power distribution member 40 is used to connect the concentrated winding coil 15 </ b> A housed in each of the annular insulating holder 41 in which four C-shaped bus bar housing grooves 42 are concentrically recessed and the bus bar housing groove 42. Neutral point bus bar 43N, U-phase bus bar 43U, V-phase bus bar 43V and W-phase bus bar 43W, which are bus bars, and feeding terminals 44U connected to U-phase bus bar 43U, V-phase bus bar 43V and W-phase bus bar 43W, 44V, 44W. The power distribution member 40 is disposed on one axial end surface of the core back of the stator core 9 so that the insulating holder 41 contacts the outer peripheral surface of the second guide portion 23 of the bobbin 20B arranged in the circumferential direction. The ends of the concentrated winding coil 15A drawn to the outer diameter side from each coil assembly 16A are connected to corresponding bus bars of the neutral point bus bar 43N, the U-phase bus bar 43U, the V-phase bus bar 43V and the W-phase bus bar 43W. Is done. Thereby, stator coil 10A formed by Y-connecting a U-phase coil, a V-phase coil, and a W-phase coil in which four concentrated winding coils 15A are connected in parallel is configured.

このように構成されたステータ８Ａは、図示していないが、ステータコア９の軸方向一端面を上方に向けて、水平に保持される。そして、小径の筒状のシール部材がそれぞれのボビン２０Ｂの第１ガイド部２２の内径側の面に接するようにステータコア９の軸方向一端面に配置される。さらに、ワニス３４が、鉛直方向上方から、ステータコア９の軸方向外方に突出する集中巻コイル１５Ａの部分に滴下される。ワニス３４は、集中巻コイル１５Ａの露出する外周面に沿って流下し、配電部材４０およびシール部材により内径側および外径側への流出を阻止されて、スロット内を通って流下する。また、ワニス３４の一部が、切り欠き２７を通ってワニス溜め溝２６に充填される。   Although not illustrated, the stator 8A configured in this manner is held horizontally with one axial end surface of the stator core 9 facing upward. The small-diameter cylindrical seal member is disposed on one axial end surface of the stator core 9 so as to be in contact with the inner diameter side surface of the first guide portion 22 of each bobbin 20B. Further, the varnish 34 is dropped from above in the vertical direction onto the portion of the concentrated winding coil 15 </ b> A that protrudes outward in the axial direction of the stator core 9. The varnish 34 flows down along the exposed outer peripheral surface of the concentrated winding coil 15A, is prevented from flowing out to the inner diameter side and the outer diameter side by the power distribution member 40 and the seal member, and flows down through the slot. A part of the varnish 34 passes through the notch 27 and fills the varnish reservoir groove 26.

そして、ワニス３４は、集中巻コイル１５Ａの露出する外周面に沿って流下する過程で、集中巻コイル１５Ａの外周面から毛細管現象で集中巻コイル１５Ａ内に含浸される。一方、ワニス溜め溝２６内に充填されたワニス３４が、集中巻コイル１５Ａの内周面に接し、集中巻コイル１５Ａの内周面から毛細管現象で集中巻コイル１５Ａ内に含浸される。さらに、ワニス溜め溝２６内に充填されたワニス３４が、毛細管現象で集中巻コイル１５Ａの内周面と胴部２１の上面との間に含浸され、胴部２１の上面に面する集中巻コイル１５Ａの内周面から集中巻コイル１５Ａ内に含浸される。   The varnish 34 is impregnated into the concentrated winding coil 15A by capillary action from the outer peripheral surface of the concentrated winding coil 15A in the process of flowing down along the exposed outer peripheral surface of the concentrated winding coil 15A. On the other hand, the varnish 34 filled in the varnish reservoir groove 26 is in contact with the inner peripheral surface of the concentrated winding coil 15A, and is impregnated into the concentrated winding coil 15A by capillary action from the inner peripheral surface of the concentrated winding coil 15A. Further, the varnish 34 filled in the varnish reservoir groove 26 is impregnated between the inner peripheral surface of the concentrated winding coil 15 </ b> A and the upper surface of the trunk portion 21 by capillary action, and the concentrated winding coil facing the upper surface of the trunk portion 21. The concentrated winding coil 15A is impregnated from the inner peripheral surface of 15A.

ついで、ステータ８Ａの上下を反転させ、大径および小径の筒状のシール部材をステータコア９の軸方向他端面に配設し、同様に、ワニス３４を集中巻コイル１５Ａに含浸させる。そして、集中巻コイル１５Ａに含浸されたワニス３４およびワニス溜め溝２６内に充填されたワニス３４が硬化し、集中巻コイル１５Ａがボビン２０Ｂに固着される。   Next, the stator 8A is turned upside down, and cylindrical seal members having large and small diameters are disposed on the other axial end surface of the stator core 9, and the concentrated winding coil 15A is impregnated with the varnish 34 in the same manner. The varnish 34 impregnated in the concentrated winding coil 15A and the varnish 34 filled in the varnish reservoir groove 26 are cured, and the concentrated winding coil 15A is fixed to the bobbin 20B.

したがって、この実施の形態３においても、上記実施の形態１と同様の効果が得られる。
また、ワニス溜め溝２６にワニス３４を充填し、集中巻コイル１５Ａの内周面からワニスを含浸させているので、平角線からなる導体線３３Ａを隙間無く巻回して構成されている集中巻コイル１５Ａにも、ワニス３４を効率的に含浸させることができる。Therefore, also in the third embodiment, the same effect as in the first embodiment can be obtained.
Further, since the varnish reservoir groove 26 is filled with the varnish 34 and the varnish is impregnated from the inner peripheral surface of the concentrated winding coil 15A, the concentrated winding coil is formed by winding the conductor wire 33A made of a rectangular wire without a gap. 15A can also be efficiently impregnated with the varnish 34.

また、円環状の配電部材４０をボビン２０Ｂの第２ガイド部２３の外周面に接するように配設しているので、切り欠き２７の外径側の開口が配電部材４０により塞口される。そこで、集中巻コイル１５Ａのコイルエンドに滴下されて切り欠き２７に導かれたワニス３４が外径側に漏れ出すことがなく、ワニス溜め溝２６内に供給される。   Further, since the annular power distribution member 40 is disposed so as to contact the outer peripheral surface of the second guide portion 23 of the bobbin 20B, the opening on the outer diameter side of the notch 27 is closed by the power distribution member 40. Therefore, the varnish 34 dropped to the coil end of the concentrated winding coil 15A and guided to the notch 27 is supplied into the varnish reservoir groove 26 without leaking to the outer diameter side.

なお、上記各実施の形態では、インナーロータ型の電動機ついて説明しているが、本発明をアウターロータ型の電動機に適用しても、同様の効果を奏する。
また、上記各実施の形態では、本願を電動機に適用した場合について説明しているが、本願を発電機に適用しても、同様の効果を奏する。
また、上記各実施の形態では、８極１２スロットの回転電機について説明しているが、極数およびスロット数は、８極１２スロットに限定されないことは言うまでもないことである。In each of the above embodiments, the inner rotor type electric motor has been described. However, the same effect can be obtained even when the present invention is applied to an outer rotor type electric motor.
Moreover, although each said embodiment has demonstrated the case where this application is applied to an electric motor, even if it applies this application to a generator, there exists the same effect.
In each of the above embodiments, an 8-pole 12-slot rotary electric machine has been described. Needless to say, the number of poles and the number of slots are not limited to 8 poles and 12 slots.

また、上記各実施の形態では、コア片１１のティース１３がコアバック部１２の内周面の周方向中央から径方向内方に延設されているものとしているが、ティースはコアバック部の内周面の周方向中央から延設される必要はない。つまり、コアバック部の周方向の側面同士を当接させてコア片を周方向に配列して円環状のステータコアを作製できるならば、ティースの周方向両側に延在するコアバック部の長さが異なっていてもよい。   Moreover, in each said embodiment, although the teeth 13 of the core piece 11 shall be extended radially inward from the circumferential direction center of the internal peripheral surface of the core back part 12, teeth are a core back part. It is not necessary to extend from the center in the circumferential direction of the inner peripheral surface. In other words, if the annular side stator core can be produced by arranging the core pieces in the circumferential direction by bringing the circumferential side surfaces of the core back portion into contact with each other, the length of the core back portion extending on both sides in the circumferential direction of the teeth. May be different.

Claims (6)

円環状のステータコア、および該ステータコアの各ティースに巻装された集中巻コイルを有するステータと、
ロータと、を備え、
胴部、および該胴部の上面の長さ方向の両端に突設された一対のガイド部を有する樹脂製のボビンが、それぞれ、該胴部の長さ方向を上記ティースの径方向に一致させて、該胴部の底面を該ティースの軸方向両端面に沿わせて配置され、
上記集中巻コイルが、導体線を、上記ティースの軸方向両端の上記胴部と上記一対のガイド部とにより形成される凹空間内を通って、該ティースのまわりを所定回巻回させて構成されている回転電機において、
ワニス溜め溝が、溝方向を上記胴部の長さ方向として、該胴部の上面に凹設されて上記一対のガイド部間に延在し、
切り欠きが、上記一対のガイド部の相対する壁面の一方に、当該ガイド部の突出端から根元部に至り、上記ワニス溜め溝に接続されるように形成され、
ワニスが、上記集中巻コイルの上記胴部の軸方向外側の部分に含浸されているとともに、上記ワニス溜め溝および上記胴部の上面と上記集中巻コイルとの間に充填されていることを特徴とする回転電機。An annular stator core, and a stator having concentrated winding coils wound around the teeth of the stator core;
A rotor,
A resin-made bobbin having a trunk portion and a pair of guide portions protruding at both ends in the longitudinal direction of the upper surface of the trunk portion respectively matches the length direction of the trunk portion with the radial direction of the teeth. And the bottom surface of the body portion is disposed along both axial end surfaces of the teeth,
The concentrated winding coil is configured by winding a conductor wire a predetermined number of times around the teeth through a concave space formed by the body portion and the pair of guide portions at both ends in the axial direction of the teeth. In the rotating electrical machine,
The varnish reservoir groove is recessed in the upper surface of the barrel portion with the groove direction as the length direction of the barrel portion and extends between the pair of guide portions,
A notch is formed on one of the opposing wall surfaces of the pair of guide portions so as to reach the root portion from the protruding end of the guide portion and be connected to the varnish reservoir groove,
The varnish is impregnated in the axially outer portion of the body portion of the concentrated winding coil, and is filled between the varnish reservoir groove and the upper surface of the body portion and the concentrated winding coil. Rotating electric machine. 上記切り欠きは、上記一対のガイド部の径方向外側に位置するガイド部に形成されていることを特徴とする請求項１記載の回転電機。   The rotating electrical machine according to claim 1, wherein the notch is formed in a guide portion located on a radially outer side of the pair of guide portions. 上記ワニス溜め溝の底面と上記ティースの軸方向端面との間の距離が、上記切り欠きの底面と上記ティースの軸方向端面との間の距離と等しい、又は短いことを特徴とする請求項１又は請求項２記載の回転電機。   2. The distance between the bottom surface of the varnish reservoir groove and the axial end surface of the tooth is equal to or shorter than the distance between the bottom surface of the notch and the axial end surface of the tooth. Or the rotary electric machine of Claim 2. 上記ステータコアのコアバックの軸方向端面に配設された円環状の絶縁ホルダ、および上記絶縁ホルダ内に収納され、上記集中巻コイルの結線用のバスバーを有する配電部材を備え、
上記切り欠きは、上記ステータコアのコアバック側に位置する上記ガイド部に径方向に貫通するように形成され、そのコアバック側の開口が上記絶縁ホルダにより塞口されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載の回転電機。An annular insulating holder disposed on the axial end surface of the core back of the stator core, and a power distribution member housed in the insulating holder and having a bus bar for connecting the concentrated winding coil,
The notch is formed so as to penetrate through the guide portion located on the core back side of the stator core in the radial direction, and the opening on the core back side is closed by the insulating holder. The rotating electrical machine according to any one of claims 1 to 3. 上記導体線が丸線であることを特徴とする請求項１乃至請求項４のいずれか１項に記載の回転電機。   The rotating electrical machine according to any one of claims 1 to 4, wherein the conductor wire is a round wire. 上記導体線が平角線であり、
上記集中巻コイルが上記導体線をエッジワイズ巻きに巻かれて構成されていることを特徴とする請求項１乃至請求項４のいずれか１項に記載の回転電機。The conductor wire is a flat wire,
The rotating electrical machine according to any one of claims 1 to 4, wherein the concentrated winding coil is configured by winding the conductor wire in an edgewise manner.
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