JP5286735B2 - Rotating electric machine stator - Google Patents
Rotating electric machine stator Download PDFInfo
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- JP5286735B2 JP5286735B2 JP2007262122A JP2007262122A JP5286735B2 JP 5286735 B2 JP5286735 B2 JP 5286735B2 JP 2007262122 A JP2007262122 A JP 2007262122A JP 2007262122 A JP2007262122 A JP 2007262122A JP 5286735 B2 JP5286735 B2 JP 5286735B2
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Description
本発明は、回転電機の固定子に関し、詳しくは、固定子コアと固定子巻線との絶縁性能に優れた回転電機の固定子に関する。 The present invention relates to a stator of a rotating electrical machine, and more particularly, to a stator of a rotating electrical machine having excellent insulation performance between a stator core and a stator winding.
一般的に、回転電機は、周方向に交互に異なる複数の磁極を形成している回転子と、回転子と内周側または外周側で向き合う、周方向に複数のスロットを有する固定子コアと、スロットに設置されている固定子巻線が連続して形成したコイルと、を備えている。そして、固定子巻線は、導体と、該導体の外周を被覆する絶縁皮膜から構成されている。 Generally, a rotating electrical machine includes a rotor that forms a plurality of magnetic poles that are alternately different in the circumferential direction, and a stator core that has a plurality of slots in the circumferential direction that face the rotor on the inner or outer circumferential side. And a coil formed continuously by stator windings installed in the slots. And the stator winding | coil is comprised from the conductor and the insulating film which coat | covers the outer periphery of this conductor.
この回転電機においては、固定子巻線と固定子コアとの電気絶縁性が重要となっている。すなわち、固定子巻線の絶縁皮膜に加工傷などが存在すると、固定子巻線の導体が露出することとなる。固定子巻線の導体が露出した状態で高電圧が印加されると、露出した部分と近接した固定子コアとの間で放電が生じ、周囲の異物や絶縁皮膜が炭化して、導体と固定子コアとが導通される（絶縁破壊に至る）。その結果、コイルを流れる電流が減少し、回転電機の性能が低下する。さらに、固定子コアにも電流が流れることとなり、固定子コアにおいて発生する磁束も減少する。 In this rotating electrical machine, electrical insulation between the stator winding and the stator core is important. That is, if there is a processing flaw or the like in the insulating film of the stator winding, the conductor of the stator winding is exposed. When a high voltage is applied with the stator winding conductor exposed, a discharge occurs between the exposed part and the adjacent stator core, and the surrounding foreign material and insulation film carbonize to fix the conductor. The child core is conducted (leads to dielectric breakdown). As a result, the current flowing through the coil is reduced, and the performance of the rotating electrical machine is degraded. Furthermore, current flows through the stator core, and the magnetic flux generated in the stator core is also reduced.
このような固定子巻線と固定子コアとの間の電気絶縁性を確保するために、固定子巻線と固定子コアとの間に絶縁部材を介在させることで両者の間の電気絶縁性を確保することが、特許文献１〜２に開示されている。 In order to ensure such electrical insulation between the stator winding and the stator core, an insulation member is interposed between the stator winding and the stator core, thereby providing electrical insulation between the two. It is disclosed in Patent Documents 1 and 2 to ensure the above.
特許文献１には、固定子コアのスロットに挿入されているスロット絶縁部と固定子コアの軸方向の端面に鍔状に設置されたコア絶縁部を一体に有した構造のコア絶縁部材が開示されている。ここで、スロット絶縁部は、コアのスロットの内周面と略一致する形状に形成されており、スロットの開口部は開口している。 Patent Document 1 discloses a core insulating member having a structure in which a slot insulating portion inserted into a slot of a stator core and a core insulating portion installed in a hook shape on an axial end surface of the stator core are integrally provided. Has been. Here, the slot insulating part is formed in a shape substantially coincident with the inner peripheral surface of the slot of the core, and the opening of the slot is open.
しかしながら、このコア絶縁部材はスロットが軸方向に沿って開口したコア内周面に対する電気絶縁性が十分に確保されていなかった。つまり、固定子巻線に製造欠陥や加工傷による皮膜欠損部が固定子コアの内周面の近傍に存在した場合には、皮膜欠損部と固定子コアとの絶縁のための距離（沿面距離）が十分に確保されなくなり、コイル導体とコア内径表面の耐電圧の低下や使用環境時の汚損によるトラッキング現象を誘発する恐れがあった。すなわち、固定子巻線と固定子コアの間の電気絶縁性が低下するという問題があった。 However, this core insulating member has not sufficiently ensured electrical insulation with respect to the inner peripheral surface of the core whose slots are open along the axial direction. In other words, if there is a film defect due to manufacturing defects or processing flaws in the stator winding near the inner peripheral surface of the stator core, the insulation distance between the film defect and the stator core (creeping distance) ) Is not sufficiently secured, and there is a risk of inducing a tracking phenomenon due to a decrease in withstand voltage of the coil conductor and the inner surface of the core or contamination in the use environment. That is, there is a problem that the electrical insulation between the stator winding and the stator core is lowered.
また、特許文献２には、スロット絶縁部とスロット絶縁紙折り曲げ部を一体化している絶縁紙が開示されている。 Patent Document 2 discloses an insulating paper in which a slot insulating portion and a slot insulating paper bent portion are integrated.
しかしながら、この絶縁紙は、固定子コアの側面（固定子コアの内周面）と固定子巻線との間が完全に絶縁できない構造となっている。このため、特許文献１の時と同様に、固定子巻線と固定子コアとの間の沿面距離が電気絶縁性を確保するためには不十分となり、固定子巻線と固定子コアの間の電気絶縁性が低下するという問題があった。
本発明は上記実状に鑑みてなされたものであり、固定子巻線と固定子コアとの間の電気絶縁性が十分に確保された回転電機の固定子を提供することを課題とする。 This invention is made | formed in view of the said actual condition, and makes it a subject to provide the stator of the rotary electric machine by which the electrical insulation between the stator coil | winding and the stator core was fully ensured.
また、本発明の請求項１に記載の回転電機の固定子は、軸方向の両端面および内径側と外径側の一方の側面に開口した軸方向にのびる複数のスロットをもつ固定子コアと、連続してスロット内に設置されてコイルを形成する固定子巻線と、固定子コアとコイルとを電気的に絶縁する絶縁部材と、を備えた回転電機の固定子において、絶縁部材が、スロットの内表面に沿って広がるスロット絶縁部と、スロット絶縁部に一体に形成された固定子コアの軸方向の端面に沿って広がる端面鍔部と、スロット絶縁部に一体に形成された固定子コアのスロットの開口した側面に沿って広がる側面鍔部と、からなり、周方向で隣り合ったスロットに配される絶縁部材の重なり合った端面鍔部は、絶縁シートとも重なり合っていることを特徴とする。 The stator of the rotating electric machine according to claim 1 of the present invention includes a stator core having a plurality of slots extending in the axial direction which opens on one side of the end faces and the inner diameter side and outer diameter side of the axial direction In a stator of a rotating electric machine comprising a stator winding that is continuously installed in a slot to form a coil, and an insulating member that electrically insulates the stator core and the coil, the insulating member is: A slot insulating portion extending along the inner surface of the slot; an end surface flange extending along an axial end surface of the stator core formed integrally with the slot insulating portion; and a stator formed integrally with the slot insulating portion. A side flange extending along the open side surface of the slot of the core, and the overlapping end surface flange of the insulating member arranged in the adjacent slots in the circumferential direction is also overlapped with the insulating sheet. To do.
請求項２に記載の回転電機の固定子は、請求項１に記載の回転電機の固定子において、周方向で隣り合ったスロットに配される二つの絶縁部材は、それぞれの端面鍔部が重なり合っていることを特徴とする。 The stator of the rotating electrical machine according to claim 2 is the stator of the rotating electrical machine according to claim 1 , wherein the two insulating members disposed in the slots adjacent in the circumferential direction overlap each other. It is characterized by.
本発明の回転電機の固定子は、周方向で隣り合ったスロットに配される絶縁部材は、それぞれの側面鍔部が重なり合う。 In the stator of the rotating electric machine according to the present invention, the side flanges overlap each other in the insulating members disposed in the slots adjacent in the circumferential direction .
請求項３に記載の回転電機の固定子は、請求項２に記載の回転電機の固定子において、周方向で隣り合ったスロットに配される絶縁部材の重なり合った側面鍔部は、さらに、絶縁シートとも重なり合っていることを特徴とする。
請求項４に記載の回転電機の固定子は、軸方向の両端面および内径側と外径側の一方の側面に開口した軸方向にのびる複数のスロットをもつ固定子コアと、連続してスロット内に設置されてコイルを形成する固定子巻線と、固定子コアとコイルとを電気的に絶縁する絶縁部材と、を備えた回転電機の固定子において、絶縁部材が、スロットの内表面に沿って広がるスロット絶縁部と、スロット絶縁部に一体に形成された固定子コアの軸方向の端面に沿って広がる端面鍔部と、スロット絶縁部に一体に形成された固定子コアのスロットの開口した側面に沿って広がる側面鍔部と、からなり、周方向で隣り合ったスロットに配される絶縁部材の重なり合った側面鍔部は、さらに、絶縁シートとも重なり合っていることを特徴とする。
請求項５に記載の回転電機の固定子は、請求項４に記載の回転電機の固定子において、周方向で隣り合ったスロットに配される二つの絶縁部材は、それぞれの端面鍔部が重なり合っていることを特徴とする。
請求項６に記載の回転電機の固定子は、請求項４〜５のいずれかに記載の回転電機の固定子において、周方向で隣り合ったスロットに配される絶縁部材の重なり合った端面鍔部は、さらに、絶縁シートとも重なり合っていることを特徴とする。
The stator of the rotating electrical machine according to claim 3 is the stator of the rotating electrical machine according to claim 2 , wherein the overlapping side flanges of the insulating members disposed in the slots adjacent in the circumferential direction are further insulated. It is characterized by overlapping with the sheet.
A stator for a rotating electrical machine according to claim 4 , wherein the stator core has a plurality of axially extending slots opened on both end surfaces in the axial direction and one side surface on the inner diameter side and the outer diameter side. In a stator of a rotating electrical machine having a stator winding that is installed in a coil to form a coil, and an insulating member that electrically insulates the stator core and the coil, the insulating member is formed on the inner surface of the slot. A slot insulating portion extending along the end, an end surface flange extending along an axial end surface of the stator core formed integrally with the slot insulating portion, and an opening of the slot of the stator core formed integrally with the slot insulating portion The side flanges that overlap the insulating members disposed in the slots adjacent to each other in the circumferential direction further overlap with the insulating sheet.
The stator of the rotating electrical machine according to claim 5 is the stator of the rotating electrical machine according to claim 4 , wherein the two insulating members arranged in the slots adjacent in the circumferential direction overlap each other. It is characterized by.
The stator of the rotating electrical machine according to claim 6 is the stator of the rotating electrical machine according to any one of claims 4 to 5 , wherein the end surface flange portions of the insulating members disposed in the slots adjacent in the circumferential direction are overlapped Is further characterized by overlapping with the insulating sheet.
本発明の請求項１に記載の回転電機の固定子は、スロットの内表面に沿って広がるスロット絶縁部と、スロット絶縁部に一体に形成された固定子コアの軸方向の端面に沿って広がる端面鍔部と、スロット絶縁部に一体に形成された固定子コアのスロットの開口した側面に沿って広がる側面鍔部と、を有する絶縁部材を有している。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間に絶縁部材が位置している。このため、固定子巻線に皮膜欠損部があっても、絶縁部材により固定子コアとの間で絶縁破壊を生じなくなっている。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間の電気絶縁性が十分に確保された回転電機の固定子となっている。
そして、端面鍔部がさらに絶縁シートと重なり合っている。これにより、より沿面距離が長くなり、固定子コアの端面との間に絶縁破壊を生じなくなっている。
According to a first aspect of the present invention, there is provided a stator for a rotating electrical machine that extends along an axial end surface of a slot insulating portion that extends along the inner surface of the slot and a stator core that is integrally formed with the slot insulating portion. The insulating member has an end surface flange and a side flange extending along the open side surface of the slot of the stator core formed integrally with the slot insulator. That is, in the stator of the rotating electrical machine of the present invention, the insulating member is located between the stator winding and the stator core. For this reason, even if the stator winding has a film defect portion, the insulation member does not cause dielectric breakdown with the stator core. That is, the stator of the rotating electrical machine of the present invention is a stator of the rotating electrical machine in which electrical insulation between the stator winding and the stator core is sufficiently secured.
And the end surface collar part has overlapped with the insulating sheet further. As a result, the creepage distance becomes longer, and dielectric breakdown does not occur between the end surface of the stator core.
請求項１に記載の固定子は、隣接する二つの絶縁部材のそれぞれの端面鍔部が重なり合っている。このため、コイルを形成する固定子巻線の固定子コアの端面から突出した部分に加工傷等が発生しても、固定子コアの端面までの沿面距離が端面鍔部の表面及び裏面に沿った距離となり、固定子コアの端面との間に絶縁破壊を生じなくなっている。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間の電気絶縁性が十分に確保された回転電機の固定子となっている。 In the stator according to claim 1 , the end surface flange portions of two adjacent insulating members overlap each other. For this reason, even if a processing flaw etc. generate | occur | produces in the part which protruded from the end surface of the stator core of the stator winding | coil which forms a coil, the creeping distance to the end surface of a stator core is along the surface and back surface of an end surface collar part. Thus, dielectric breakdown does not occur between the end face of the stator core. That is, the stator of the rotating electrical machine of the present invention is a stator of the rotating electrical machine in which electrical insulation between the stator winding and the stator core is sufficiently secured.
請求項２に記載の固定子は、隣接する二つの絶縁部材のそれぞれの側面鍔部が重なり合っている。このため、固定子巻線が固定子コアの側面との間で放電を生じようとしても、固定子コアの側面までの沿面距離が側面鍔部の表面及び裏面に沿った長い距離となる。沿面距離が長くなることで、固定子コアとの間に絶縁破壊を生じなくなっている。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間の電気絶縁性が十分に確保された回転電機の固定子となっている。 In the stator according to the second aspect, the side flanges of the two adjacent insulating members overlap each other. For this reason, even if the stator winding tries to generate a discharge between the side surfaces of the stator core, the creepage distance to the side surface of the stator core becomes a long distance along the front and back surfaces of the side flange. As the creepage distance increases, dielectric breakdown does not occur with the stator core. That is, the stator of the rotating electrical machine of the present invention is a stator of the rotating electrical machine in which electrical insulation between the stator winding and the stator core is sufficiently secured.
請求項３に記載の固定子は、請求項２において、さらに絶縁シートが重なり合っている。これにより、より沿面距離が長くなり、固定子コアの端面との間に絶縁破壊を生じなくなっている。
本発明の請求項６に記載の回転電機の固定子は、スロットの内表面に沿って広がるスロット絶縁部と、スロット絶縁部に一体に形成された固定子コアの軸方向の端面に沿って広がる端面鍔部と、スロット絶縁部に一体に形成された固定子コアのスロットの開口した側面に沿って広がる側面鍔部と、を有する絶縁部材を有している。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間に絶縁部材が位置している。このため、固定子巻線に皮膜欠損部があっても、絶縁部材により固定子コアとの間で絶縁破壊を生じなくなっている。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間の電気絶縁性が十分に確保された回転電機の固定子となっている。
そして、側面鍔部がさらに絶縁シートが重なり合っている。これにより、より沿面距離が長くなり、固定子コアの端面との間に絶縁破壊を生じなくなっている。
請求項５に記載の固定子は、隣接する二つの絶縁部材のそれぞれの端面鍔部が重なり合っている。このため、コイルを形成する固定子巻線の固定子コアの端面から突出した部分に加工傷等が発生しても、固定子コアの端面までの沿面距離が端面鍔部の表面及び裏面に沿った距離となり、固定子コアの端面との間に絶縁破壊を生じなくなっている。つまり、本発明の回転電機の固定子は、固定子巻線と固定子コアとの間の電気絶縁性が十分に確保された回転電機の固定子となっている。
請求項６に記載の固定子は、請求項４〜５において、さらに絶縁シートが重なり合っている。これにより、より沿面距離が長くなり、固定子コアの端面との間に絶縁破壊を生じなくなっている。
The stator according to claim 3 is the stator according to claim 2, wherein the insulating sheets are further overlapped. As a result, the creepage distance becomes longer, and dielectric breakdown does not occur between the end surface of the stator core.
According to a sixth aspect of the present invention, the stator of the rotating electric machine extends along the axial end face of the stator core formed integrally with the slot insulating portion and the slot insulating portion extending along the inner surface of the slot. The insulating member has an end surface flange and a side flange extending along the open side surface of the slot of the stator core formed integrally with the slot insulator. That is, in the stator of the rotating electrical machine of the present invention, the insulating member is located between the stator winding and the stator core. For this reason, even if the stator winding has a film defect portion, the insulation member does not cause dielectric breakdown with the stator core. That is, the stator of the rotating electrical machine of the present invention is a stator of the rotating electrical machine in which electrical insulation between the stator winding and the stator core is sufficiently secured.
In addition, the insulating sheet overlaps the side flange portion. As a result, the creepage distance becomes longer, and dielectric breakdown does not occur between the end surface of the stator core.
In the stator according to the fifth aspect, the end surface flange portions of the two adjacent insulating members overlap each other. For this reason, even if a processing flaw etc. generate | occur | produces in the part which protruded from the end surface of the stator core of the stator winding | coil which forms a coil, the creeping distance to the end surface of a stator core is along the surface and back surface of an end surface collar part. Thus, dielectric breakdown does not occur between the end face of the stator core. That is, the stator of the rotating electrical machine according to the present invention is a stator of the rotating electrical machine in which electrical insulation between the stator winding and the stator core is sufficiently secured.
A stator according to a sixth aspect is the stator according to the fourth to fifth aspects, wherein the insulating sheets further overlap. As a result, the creepage distance becomes longer, and dielectric breakdown does not occur between the end surface of the stator core.
以下、本発明を実施の形態で具体的に説明する。 Hereinafter, the present invention will be specifically described with reference to embodiments.
（第一参考形態）
本参考形態の回転電機の固定子を用いた回転電機の構成を図１に示した。この回転電機は、略円筒状の固定子１と、固定子１の軸心部に回転自在に収容された回転子２と、を有する。
( First reference form )
The configuration of a rotating electrical machine using the stator of the rotating electrical machine of the present embodiment is shown in FIG. The rotating electrical machine includes a substantially cylindrical stator 1 and a rotor 2 rotatably accommodated in an axial center portion of the stator 1.
回転子２は、図１に示したように、径方向の外周面で周方向に交互に異なる磁極が位置するように永久磁石が配置された構成となっている。回転子２は、外周面の磁極が固定子１に対向した状態で形成されている。 As shown in FIG. 1, the rotor 2 has a configuration in which permanent magnets are arranged so that different magnetic poles are positioned alternately in the circumferential direction on the outer circumferential surface in the radial direction. The rotor 2 is formed with the magnetic poles on the outer peripheral surface facing the stator 1.
固定子１は、図２に示したように、略円筒状の固定子コア１０と、コア１０のスロット１１，１２内に設置された固定子巻線３と、固定子巻線３と固定子コア１０との間の電気絶縁性を確保する絶縁部材４と、を有する。 As shown in FIG. 2, the stator 1 includes a substantially cylindrical stator core 10, a stator winding 3 installed in the slots 11 and 12 of the core 10, a stator winding 3 and a stator. And an insulating member 4 that ensures electrical insulation with the core 10.
固定子コア１０には、軸方向に沿ってのび、周方向に隣接するスロット１１，１２を一組として固定子コア１０の内周側の周方向に複数組のスロットが形成されている。固定子巻線３は三相巻線であり、周方向に隣接する一組のスロット１１，１２に各相の固定子巻線３が設置されている。そして、スロット１１，１２を一組として周方向に隣接する三相のスロット１１，１２に異なる相の固定子巻線３が設置されている。 In the stator core 10, a plurality of sets of slots are formed in the circumferential direction on the inner circumferential side of the stator core 10, with a pair of slots 11 and 12 extending in the axial direction and adjacent in the circumferential direction. The stator winding 3 is a three-phase winding, and the stator winding 3 for each phase is installed in a pair of slots 11 and 12 adjacent in the circumferential direction. The stator windings 3 of different phases are installed in the three-phase slots 11 and 12 adjacent to each other in the circumferential direction with the slots 11 and 12 as a set.
固定子コア１０の軸方向の両端面には、各スロット１１，１２の開口部から所定の距離の範囲内に絶縁皮膜４１が形成されている。絶縁皮膜４１は、図３（ａ）に示した本参考形態のように、固定子コア１０の端面の全面に形成されていることが好ましい。この絶縁皮膜４１は、電気絶縁性を付与できればその材質が限定されるものではなく、エポキシ樹脂やフェノール樹脂よりなる樹脂皮膜とすることができる。 On both end surfaces of the stator core 10 in the axial direction, insulating films 41 are formed within a predetermined distance from the openings of the slots 11 and 12. The insulating film 41 is preferably formed on the entire end face of the stator core 10 as in the present embodiment shown in FIG. The material of the insulating film 41 is not limited as long as it can provide electrical insulation, and can be a resin film made of epoxy resin or phenol resin.
また、絶縁皮膜４１は、固定子コア１０のスロット１１，１２が開口した側面（本参考形態では固定子コア１０の内周面）であって、軸方向の両端部から所定の距離までの範囲内にも形成されている。この固定子コア１０の側面での絶縁皮膜４１の形成された範囲は、本参考形態の固定子の使用状況により適宜決定される。絶縁皮膜４１は、この固定子コア１０の側面の全面に形成してもよい。 The insulating film 41 is a side surface (in the present embodiment , the inner peripheral surface of the stator core 10) where the slots 11 and 12 of the stator core 10 are open, and a range from both axial end portions to a predetermined distance. It is also formed inside. The range in which the insulating film 41 is formed on the side surface of the stator core 10 is appropriately determined depending on the usage state of the stator according to this embodiment . The insulating film 41 may be formed on the entire side surface of the stator core 10.
さらに、絶縁皮膜４１は、図３（ｂ）に示したように、スロット１１，１２の内面の軸方向の両端部から所定の距離までの範囲内にも形成されていてもよい。 Further, as shown in FIG. 3B, the insulating film 41 may also be formed within a range from the axial end portions of the inner surfaces of the slots 11 and 12 to a predetermined distance.
固定子コア１０は、複数枚の金属薄板を積層させてなる。なお、積層された金属薄板の間には、絶縁薄膜が配置されている。ここで、金属薄板および絶縁薄膜の材質や厚さについては従来公知の材質や厚さとすることができる。 The stator core 10 is formed by laminating a plurality of thin metal plates. An insulating thin film is disposed between the laminated metal thin plates. Here, the material and the thickness of the metal thin plate and the insulating thin film can be a conventionally known material and thickness.
固定子巻線３は、図４に示したように、銅製の導体３５と、導体３５の外周を覆い導体３５を絶縁する絶縁皮膜３６とから形成された線材よりなる。 As shown in FIG. 4, the stator winding 3 is made of a wire made of a copper conductor 35 and an insulating film 36 that covers the outer periphery of the conductor 35 and insulates the conductor 35.
固定子巻線３は、連続巻線で固定子コア１０に波巻されており、固定子コア１０に開口したスロット１１，１２に収容されるスロット収容部３０と、固定子コア１０の軸方向の端面から突出したターン部３１を有し、全体でコイルを形成している。また、図５〜６に示したように、固定子巻線３は、スロット１１，１２内に、径方向に複数層が並んだ状態で配設されている。 The stator winding 3 is a continuous winding and is wound around the stator core 10, and includes a slot accommodating portion 30 accommodated in the slots 11 and 12 opened in the stator core 10, and the axial direction of the stator core 10. The turn part 31 protruded from the end face of the coil, and the coil is formed as a whole. Further, as shown in FIGS. 5 to 6, the stator winding 3 is disposed in the slots 11 and 12 in a state where a plurality of layers are arranged in the radial direction.
固定子巻線３のスロット収容部３０は、絶縁シートを巻回して筒状に成形してなるスロット絶縁部材４０内に収容された状態で、スロット１１，１２に収容される。スロット絶縁部材４０は、径方向に複数並んだ状態の複数の複数のスロット収容部３０をその内部に配した状態でスロット１１，１２に収容される。 The slot accommodating portion 30 of the stator winding 3 is accommodated in the slots 11 and 12 while being accommodated in a slot insulating member 40 formed by winding an insulating sheet into a cylindrical shape. The slot insulating member 40 is accommodated in the slots 11 and 12 with a plurality of slot accommodating portions 30 arranged in the radial direction arranged in the inside thereof.
スロット絶縁部材４０は、固定子コア１０の側面でのスロット１１，１２側で端部が重なり合った状態で、複数のスロット収容部３０を巻回した絶縁シートよりなる。スロット絶縁部材４０を構成する絶縁シートは、電気絶縁性を備えたシート状の部材であれば特に限定されるものではなく、従来の固定子で用いられている絶縁紙を用いることができる。 The slot insulating member 40 is made of an insulating sheet in which a plurality of slot accommodating portions 30 are wound in a state where the end portions overlap on the side of the slots 11 and 12 on the side surface of the stator core 10. The insulating sheet constituting the slot insulating member 40 is not particularly limited as long as it is a sheet-like member having electrical insulation, and insulating paper used in a conventional stator can be used.
スロット絶縁部材４０は、その軸方向の長さが固定子コア１０の軸方向の長さと一致し、軸方向の両端部が固定子コア１０の両端面に一致した状態で配されている。 The slot insulating member 40 is arranged in a state in which the axial length thereof coincides with the axial length of the stator core 10 and both axial end portions thereof coincide with both end surfaces of the stator core 10.
本参考形態においては、スロット絶縁部材４０と絶縁皮膜４１とにより絶縁部材４が構成される。 In the present embodiment , the insulating member 4 is constituted by the slot insulating member 40 and the insulating film 41.
本参考形態の回転電機の固定子１は、固定子コア１０の表面の所定の位置に絶縁皮膜４１を形成し、その後、スロット１１，１２内にスロット絶縁部材４０を形成するための絶縁シートを収容し、固定子巻線３のスロット収容部３０をスロット１１，１２内に収容して製造することができる。 The stator 1 of the rotating electrical machine according to the present embodiment forms an insulating film 41 at a predetermined position on the surface of the stator core 10, and then an insulating sheet for forming the slot insulating member 40 in the slots 11 and 12. The slot accommodating portion 30 of the stator winding 3 can be accommodated in the slots 11 and 12 and manufactured.
本参考形態の回転電機の固定子１では、スロット１１，１２に収容された固定子巻線３のスロット収容部３０に皮膜欠損部３２が存在した場合に絶縁破壊が最も起きやすい経路（破壊最短経路）は、スロット収容部３０の表面でのスロット絶縁部材４０の軸方向の端部までの経路と、スロット絶縁部材４０の軸方向の端部からコア露出部までの経路の和となっている。つまり、本参考形態の回転電機の固定子１では、絶縁皮膜４１により皮膜欠損部３２からコア露出部までの距離（破壊最短経路）が長く設定されている。 In the stator 1 of the rotating electrical machine according to the present embodiment, the path that is most likely to cause dielectric breakdown (the shortest breakage) when the film defect portion 32 exists in the slot accommodating portion 30 of the stator winding 3 accommodated in the slots 11 and 12. (Path) is the sum of the path from the end of the slot insulating member 40 in the axial direction on the surface of the slot accommodating portion 30 to the core exposed portion from the end in the axial direction of the slot insulating member 40. . That is, in the stator 1 of the rotating electrical machine according to the present embodiment , the distance from the coating defect portion 32 to the core exposed portion (shortest failure path) is set long by the insulating coating 41.
スロット収容部３０に皮膜欠損部３２が存在した場合の別の破壊最短経路としては、スロット絶縁部材４０の重なり合った端部を回り込むような経路がある。この場合でも、破壊最短経路がスロット絶縁部材４０の重なり合った端部を回り込む経路であることから、コア露出部までの距離が長くなっている。 Another shortest path for destruction when the film defect portion 32 is present in the slot accommodating portion 30 is a route that wraps around the overlapping end portion of the slot insulating member 40. Even in this case, since the shortest destruction path is a path that goes around the overlapping end portion of the slot insulating member 40, the distance to the core exposed portion is long.
また、固定子コア１０の端面から突出した固定子巻線３のターン部３１に皮膜欠損部３２が存在した場合の破壊最短経路３７は、図７に示したように、固定子コア１０の端面の内周面との角部までの経路と、この角部からコア露出部までの経路の和となっている。つまり、本参考形態の回転電機の固定子１では、絶縁皮膜４１により皮膜欠損部３２からコア露出部までの距離（破壊最短経路３７）が長く設定されている。 Further, the shortest fracture path 37 in the case where the film defect portion 32 exists in the turn portion 31 of the stator winding 3 protruding from the end face of the stator core 10 is the end face of the stator core 10 as shown in FIG. This is the sum of the path to the corner with the inner peripheral surface and the path from this corner to the exposed core. In other words, in the stator 1 of the rotating electrical machine of the present embodiment , the distance from the coating defect portion 32 to the core exposed portion (shortest failure path 37) is set longer by the insulating coating 41.
一般に、絶縁破壊を生じるために必要な電圧は、図８に示したように、沿面距離が長くなればなるほど、絶縁破壊を生じさせるための電圧が大きくなる。そして、本参考形態では、皮膜欠損部３２からコア露出部までの破壊最短経路３７は、回転電機の駆動時に固定子巻線３の電圧では絶縁破壊が生じない長さとなるように、絶縁皮膜４１の形成された領域（特に、固定子コア１０の内周面での軸方向の長さ）が設定されている。これにより、本参考形態の回転電機の固定子１は、絶縁破壊が生じなくなっている。 In general, as shown in FIG. 8, the voltage required to cause dielectric breakdown increases as the creepage distance increases. And in this reference form , the insulation short film path | route 37 from the film | membrane defect | deletion part 32 to a core exposure part is the insulation film 41 so that insulation breakdown may not arise with the voltage of the stator winding | coil 3 at the time of a drive of a rotary electric machine. Is formed (particularly, the axial length of the inner peripheral surface of the stator core 10). Thereby, the dielectric breakdown does not occur in the stator 1 of the rotating electrical machine of the present embodiment .
上記したように、本参考形態の回転電機の固定子１は、絶縁部材４により固定子巻線３と固定子コア１０との間の電気絶縁性が十分に確保された回転電機の固定子１となっている。 As described above, the stator 1 of the rotating electrical machine according to the present embodiment has the stator 1 of the rotating electrical machine in which the electrical insulation between the stator winding 3 and the stator core 10 is sufficiently secured by the insulating member 4. It has become.
（第二参考形態）
本参考形態の回転電機の固定子を用いた回転電機は、第一参考形態と同様に、略円筒状の固定子１と、固定子１の軸心部に回転自在に収容された回転子２と、を有する。
( Second reference form )
As in the first reference embodiment , the rotating electrical machine using the rotating electrical machine stator of the present embodiment is a substantially cylindrical stator 1 and a rotor 2 that is rotatably accommodated in the axial center portion of the stator 1. And having.
回転子２は、第一参考形態の時と同様に、径方向の外周面で周方向に交互に異なる磁極が位置するように永久磁石が配置された構成となっている。回転子２は、外周面の磁極が固定子１に対向した状態で形成されている。 As in the case of the first reference embodiment , the rotor 2 has a configuration in which permanent magnets are arranged so that different magnetic poles are alternately arranged in the circumferential direction on the outer circumferential surface in the radial direction. The rotor 2 is formed with the magnetic poles on the outer peripheral surface facing the stator 1.
固定子１は、略円筒状の固定子コア１０と、コア１０のスロット１１，１２内に設置された固定子巻線３と、固定子巻線３と固定子コア１０との間の電気絶縁性を確保する絶縁部材５を有する。 The stator 1 includes a substantially cylindrical stator core 10, a stator winding 3 installed in the slots 11 and 12 of the core 10, and electrical insulation between the stator winding 3 and the stator core 10. It has the insulating member 5 which ensures property.
固定子コア１０は、第一参考形態の時と同様な構成を有し、同様にして固定子巻線３が波巻きされて設置されている。 The stator core 10 has the same configuration as that of the first reference embodiment , and the stator winding 3 is similarly wound and installed.
固定子巻線３は、第一参考形態の時と同様に、銅製の導体３５と、導体３５の外周を覆い導体３５を絶縁する絶縁皮膜３６とから形成された線材である。 The stator winding 3 is a wire formed of a copper conductor 35 and an insulating film 36 that covers the outer periphery of the conductor 35 and insulates the conductor 35 as in the first reference embodiment .
固定子巻線３は、連続巻線で固定子コア１０に波巻されており、固定子コア１０に開口したスロット１１，１２に収容されるスロット収容部３０と、固定子コア１０の軸方向の端面から突出したターン部３１を有し、全体でコイルを形成している。また、固定子巻線３は、スロット１１，１２内に、径方向にスロット収容部３０が複数層が並んだ状態で配設されている。 The stator winding 3 is a continuous winding and is wound around the stator core 10, and includes a slot accommodating portion 30 accommodated in the slots 11 and 12 opened in the stator core 10, and the axial direction of the stator core 10. The turn part 31 protruded from the end face of the coil, and the coil is formed as a whole. Further, the stator winding 3 is disposed in the slots 11 and 12 in a state in which a plurality of layers of slot accommodating portions 30 are arranged in the radial direction.
絶縁部材５は、図９に示したように、スロット１１，１２の内表面に沿って広がるスロット絶縁部５０と、スロット絶縁部５０の軸方向の端部に一体に形成された固定子コアの軸方向の端面に沿って広がる端面鍔部５１と、スロット絶縁部５０に一体に形成された固定子コア１０のスロット１１，１２の開口した側面に沿って広がる側面鍔部５２と、からなる。この絶縁部材５は、電気絶縁性を備えた材質であればその材質が特に限定されるものではなく、従来の固定子で用いられている絶縁紙を用いることができる。 As shown in FIG. 9, the insulating member 5 includes a slot insulating portion 50 that extends along the inner surfaces of the slots 11 and 12, and a stator core that is integrally formed at the axial end of the slot insulating portion 50. The end face flange 51 extends along the end face in the axial direction, and the side flange 52 extends along the open side surface of the slots 11 and 12 of the stator core 10 formed integrally with the slot insulating part 50. The material of the insulating member 5 is not particularly limited as long as it is a material having electrical insulation, and insulating paper used in a conventional stator can be used.
スロット絶縁部５０は、スロット１１，１２の内周形状と略一致する形状に形成されている。 The slot insulating portion 50 is formed in a shape that substantially matches the inner peripheral shape of the slots 11 and 12.
端面鍔部５１および側面鍔部５２は、絶縁部材５がスロット１１，１２に組み付けられたときに、隣接する絶縁部材５の鍔部５１，５２同士が周方向で重なり合うように、固定子コア１０の端面または内周面の形状に沿って広がる形状で形成されている。ここで、本参考形態では、端面鍔部５１は、固定子コア１０の端面の径方向外方の周縁部が露出している。 The end face flange 51 and the side flange 52 are arranged so that the flanges 51 and 52 of the adjacent insulating members 5 overlap each other in the circumferential direction when the insulating member 5 is assembled in the slots 11 and 12. It is formed in the shape which spreads along the shape of the end surface or inner peripheral surface. Here, in the present embodiment , the end surface flange 51 has the radially outer peripheral edge of the end surface of the stator core 10 exposed.
本参考形態において、絶縁部材５は、それぞれのスロット１１，１２に組み付けられる。ここで、絶縁部材５が組み付けられた状態では、図１０〜１１に示したように、固定子コア１０の軸方向の端面および内周面は、重なり合った鍔部５１，５２により完全に被覆されている。 In this reference embodiment , the insulating member 5 is assembled in each of the slots 11 and 12. Here, in the state in which the insulating member 5 is assembled, as shown in FIGS. 10 to 11, the axial end surface and the inner peripheral surface of the stator core 10 are completely covered by the overlapping flange portions 51 and 52. ing.
本参考形態の回転電機の固定子１は、固定子コア１０の全てのスロット１１，１２に絶縁部材５を組み付けた後に、固定子巻線３をスロット１１，１２内に収容して製造することができる。 The stator 1 of the rotating electrical machine of this embodiment is manufactured by assembling the insulating member 5 in all the slots 11 and 12 of the stator core 10 and then housing the stator winding 3 in the slots 11 and 12. Can do.
本参考形態の回転電機の固定子１では、固定子コア１０の端面から突出した固定子巻線３のターン部３１に皮膜欠損部３２が存在した場合の破壊最短経路３７は、図１２に示したように、固定子コア１０の端面の周縁部までの距離となっている。つまり、本参考形態の回転電機の固定子１では、皮膜欠損部３２から固定子コア１０の周縁部までの距離（破壊最短経路３７）が端面鍔部５１により長く設定されている。 In the stator 1 of the rotating electrical machine of the present embodiment, the shortest failure path 37 when the film defect portion 32 exists in the turn portion 31 of the stator winding 3 protruding from the end face of the stator core 10 is shown in FIG. As described above, the distance to the peripheral edge of the end face of the stator core 10 is obtained. That is, in the stator 1 of the rotating electrical machine according to the present embodiment , the distance from the coating defect portion 32 to the peripheral portion of the stator core 10 (shortest fracture path 37) is set longer by the end face flange 51.
また、端面鍔部５１の時と同様に、重なり合った側面鍔部５２により固定子コア１０の側面までの距離も長く設定されている。 Similarly to the case of the end face flange 51, the distance to the side surface of the stator core 10 is set to be long by the overlapping side flange 52.
上記したように、絶縁破壊を生じるために必要な電圧は、破壊最短経路が長くなればなるほど、絶縁破壊を生じさせるための電圧が大きくなる。すなわち、本参考形態においても、第一参考形態の時と同様に、固定子巻線３と固定子コア１０との間の電気絶縁性が十分に確保された回転電機の固定子１となっている。 As described above, the voltage necessary for causing the dielectric breakdown increases as the shortest breakdown path becomes longer. That is, also in this reference embodiment , as in the case of the first reference embodiment , the stator 1 of the rotating electrical machine in which the electrical insulation between the stator winding 3 and the stator core 10 is sufficiently secured is obtained. Yes.
本参考形態においては、端面鍔部５１は、固定子コア１０の端面の周縁部が露出する形状に（径方向の長さが固定子コア１０の内径よりも短く）形成されていたが、端面鍔部５１を固定子コア１０の端面を完全に被覆できる形状に形成すると、より固定子巻線３と固定子コア１０との間の電気絶縁性を確保することができる。 In this reference embodiment , the end face flange 51 is formed in a shape in which the peripheral edge of the end face of the stator core 10 is exposed (the radial length is shorter than the inner diameter of the stator core 10). If the flange 51 is formed in a shape that can completely cover the end face of the stator core 10, electrical insulation between the stator winding 3 and the stator core 10 can be further secured.
（第一実施形態）
本実施形態は、図１３に示したように、固定子コア１０の軸方向の端面と端面鍔部５１との間に絶縁シート５３を配していること以外は第二参考形態と同様な回転電機の固定子である。
( First embodiment )
In the present embodiment, as shown in FIG. 13, the same rotation as in the second reference embodiment except that an insulating sheet 53 is arranged between the end face in the axial direction of the stator core 10 and the end face flange 51. This is an electric stator.
絶縁シート５３は、固定子コア１０の軸方向の端面と略一致する形状に形成されている。絶縁シート５３は、電気絶縁性を備えた材質であればその材質が特に限定されるものではなく、絶縁部材５と同様に絶縁紙を用いることができる。 The insulating sheet 53 is formed in a shape that substantially matches the axial end surface of the stator core 10. The material of the insulating sheet 53 is not particularly limited as long as it is a material having electrical insulation, and insulating paper can be used in the same manner as the insulating member 5.
本実施形態は、固定子コア１０の端面上に絶縁シート５３を配した状態で、絶縁部材５および固定子巻線３を組み付けることで製造できる。 The present embodiment can be manufactured by assembling the insulating member 5 and the stator winding 3 in a state where the insulating sheet 53 is arranged on the end face of the stator core 10.
本実施形態の回転電機の固定子は、破壊最短経路が、重なり合った二つの端面鍔部５１を回り込んだ後にさらに、絶縁シート５３を回り込むようになっている。つまり、端面鍔部５１の合わせ代が固定子コア１０の端面の幅より小さい場合、固定子コア１０の端面の幅と同様の絶縁シート５３を配すると、本実施形態の回転電機の固定子１では、皮膜欠損部からコア露出部までの距離がさらに長く設定されている。これにより、本実施形態の回転電機の固定子１は、固定子巻線３と固定子コア１０との間の電気絶縁性が十分に確保された回転電機の固定子１となっている。 In the stator of the rotating electrical machine according to the present embodiment, the shortest path for destruction breaks around the insulating sheet 53 after the two shortest end face flanges 51 have passed around. That is, when the margin of the end face flange 51 is smaller than the width of the end face of the stator core 10, if the insulating sheet 53 similar to the end face width of the stator core 10 is disposed, the stator 1 of the rotating electrical machine of the present embodiment. Then, the distance from a film | membrane defect | deletion part to a core exposure part is set still longer. Thereby, the stator 1 of the rotating electrical machine of the present embodiment is the stator 1 of the rotating electrical machine in which electrical insulation between the stator winding 3 and the stator core 10 is sufficiently secured.
（第二実施形態）
本実施形態は、固定子コア１０の径方向の内周面と側面鍔部５２との間に絶縁シートを配していること以外は第二参考形態と同様な回転電機の固定子である。
( Second embodiment )
The present embodiment is a stator of a rotating electrical machine similar to the second embodiment except that an insulating sheet is disposed between the radially inner peripheral surface of the stator core 10 and the side surface flange portion 52.
絶縁シートは、固定子コア１０の軸方向の端面と略一致する形状に形成されている。絶縁シートは、電気絶縁性を備えた材質であればその材質が特に限定されるものではなく、絶縁部材５と同様に絶縁紙を用いることができる。 The insulating sheet is formed in a shape that substantially matches the axial end surface of the stator core 10. The material of the insulating sheet is not particularly limited as long as it is a material having electrical insulation, and insulating paper can be used in the same manner as the insulating member 5.
本実施形態は、固定子コア１０の内周面上に絶縁シートを配した状態で、絶縁部材５および固定子巻線３を組み付けることで製造できる。 The present embodiment can be manufactured by assembling the insulating member 5 and the stator winding 3 in a state where an insulating sheet is arranged on the inner peripheral surface of the stator core 10.
本実施形態の回転電機の固定子は、破壊最短経路が、重なり合った二つの側面鍔部５２を回り込んだ後にさらに、絶縁シートを回り込むようになっている。つまり、本実施形態の回転電機の固定子１では、皮膜欠損部からコア内周面までの距離がさらに長く設定されている。これにより、本実施形態の回転電機の固定子１は、固定子巻線３と固定子コア１０との間の電気絶縁性が十分に確保された回転電機の固定子１となっている。 In the stator of the rotating electric machine according to the present embodiment, the shortest path for destruction further wraps around the insulating sheet after wrapping around the two overlapping side surface flanges 52. That is, in the stator 1 of the rotating electrical machine of the present embodiment, the distance from the coating defect portion to the core inner peripheral surface is set to be longer. Thereby, the stator 1 of the rotating electrical machine of the present embodiment is the stator 1 of the rotating electrical machine in which electrical insulation between the stator winding 3 and the stator core 10 is sufficiently secured.
（その他の形態）
なお、上記の各実施形態においては、固定子１が回転子２の外周に配置された回転電機の固定子１が説明されていたが、回転子が固定子の外周に配された構成の回転電機に本発明を用いてもよい。
(Other forms)
In each of the above-described embodiments, the stator 1 of the rotating electrical machine in which the stator 1 is disposed on the outer periphery of the rotor 2 has been described. However, the rotation has a configuration in which the rotor is disposed on the outer periphery of the stator. The present invention may be used for an electric machine.
１：固定子 １０：固定子コア
１１，１２：スロット
２：回転子
３：固定子巻線 ３０：スロット収容部
３１：ターン部 ３２：皮膜欠損部
３５：導体 ３６：絶縁皮膜
３７：破壊最短経路
４：絶縁部材 ４０：スロット絶縁部材
４１：絶縁皮膜
５：絶縁部材 ５０：スロット絶縁部
５１：端面鍔部 ５２：側面鍔部
５３：絶縁シート
1: Stator 10: Stator Core 11, 12: Slot 2: Rotor 3: Stator Winding 30: Slot Housing Part 31: Turn Part 32: Film Defect 35: Conductor 36: Insulating Film 37: Shortest Breakage Path 4: Insulating member 40: Slot insulating member 41: Insulating film 5: Insulating member 50: Slot insulating portion 51: End surface flange 52: Side surface flange 53: Insulating sheet
Claims (6)
連続して該スロット内に設置されてコイルを形成する固定子巻線と、
該固定子コアと該コイルとを電気的に絶縁する絶縁部材と、
を備えた回転電機の固定子において、
該絶縁部材が、
該スロットの内表面に沿って広がるスロット絶縁部と、該スロット絶縁部に一体に形成された該固定子コアの軸方向の端面に沿って広がる端面鍔部と、該スロット絶縁部に一体に形成された該固定子コアの該スロットの開口した側面に沿って広がる側面鍔部と、
からなり、
周方向で隣り合ったスロットに配される絶縁部材の重なり合った端面鍔部は、絶縁シートとも重なり合っていることを特徴とする回転電機の固定子。 A stator core having a plurality of axially extending slots opened on both end surfaces in the axial direction and one side surface on the inner diameter side and the outer diameter side;
A stator winding that is continuously installed in the slot to form a coil;
An insulating member for electrically insulating the stator core and the coil;
In the stator of a rotating electric machine with
The insulating member is
A slot insulating portion that extends along the inner surface of the slot, an end surface flange that extends along the axial end surface of the stator core that is formed integrally with the slot insulating portion, and a single piece that is formed integrally with the slot insulating portion. A side hook extending along the open side of the slot of the stator core formed;
Consists of
A stator for a rotating electrical machine, wherein the overlapping end surface flanges of insulating members arranged in adjacent slots in the circumferential direction are also overlapped with an insulating sheet.
連続して該スロット内に設置されてコイルを形成する固定子巻線と、
該固定子コアと該コイルとを電気的に絶縁する絶縁部材と、
を備えた回転電機の固定子において、
該絶縁部材が、
該スロットの内表面に沿って広がるスロット絶縁部と、該スロット絶縁部に一体に形成された該固定子コアの軸方向の端面に沿って広がる端面鍔部と、該スロット絶縁部に一体に形成された該固定子コアの該スロットの開口した側面に沿って広がる側面鍔部と、
からなり、
周方向で隣り合った該スロットに配される該絶縁部材の重なり合った該側面鍔部は、さらに、絶縁シートとも重なり合っていることを特徴とする回転電機の固定子。 A stator core having a plurality of axially extending slots opened on both end surfaces in the axial direction and one side surface on the inner diameter side and the outer diameter side;
A stator winding that is continuously installed in the slot to form a coil;
An insulating member for electrically insulating the stator core and the coil;
In the stator of a rotating electric machine with
The insulating member is
A slot insulating portion that extends along the inner surface of the slot, an end surface flange that extends along the axial end surface of the stator core that is formed integrally with the slot insulating portion, and a single piece that is formed integrally with the slot insulating portion. A side hook extending along the open side of the slot of the stator core formed;
Consists of
The stator of a rotating electrical machine, wherein the side surface flanges of the insulating members arranged in the slots adjacent in the circumferential direction are further overlapped with an insulating sheet.
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| JP2007262122A JP5286735B2 (en) | 2007-10-05 | 2007-10-05 | Rotating electric machine stator |
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