JP5233385B2 - Rotating electric machine stator and rotating electric machine - Google Patents

Rotating electric machine stator and rotating electric machine Download PDF

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JP5233385B2
JP5233385B2 JP2008110788A JP2008110788A JP5233385B2 JP 5233385 B2 JP5233385 B2 JP 5233385B2 JP 2008110788 A JP2008110788 A JP 2008110788A JP 2008110788 A JP2008110788 A JP 2008110788A JP 5233385 B2 JP5233385 B2 JP 5233385B2
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stator
core
rotating electrical
electrical machine
circumferential direction
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JP2009268160A (en
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啓吾 森口
利昭 大原
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Denso Corp
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Description

本発明は、回転電機の固定子およびその固定子を用いた回転電機に関する。   The present invention relates to a stator of a rotating electrical machine and a rotating electrical machine using the stator.

近年、電動機および発電機として使用される回転電機には、周方向に複数のスロットを有する固定子コアと、線材により形成されスロットに設置されている固定子巻線と、を備えた固定子と、固定子の内周側又は外周側に周方向に異なる磁極を形成している回転子を備えた回転電機がある。そして、たとえば、特許文献１に示されているように、固定子コアは、複数の分割コアを周方向に沿って配設して形成される。   In recent years, in a rotating electrical machine used as an electric motor and a generator, a stator including a stator core having a plurality of slots in the circumferential direction, and a stator winding formed of a wire material and installed in the slots, There is a rotating electrical machine including a rotor in which different magnetic poles are formed in the circumferential direction on the inner peripheral side or the outer peripheral side of the stator. For example, as shown in Patent Document 1, the stator core is formed by arranging a plurality of divided cores along the circumferential direction.

このような分割コアにおいては、一般に、回転子との対向面の寸法精度を高くし、分割コア同士の当接面には公差を許容している。分割コア同士の当接面では公差が許容されたことで、分割コアを周方向に配設して固定子コアを形成したときに、分割コアの当接面間に公差に起因するすき間が形成されるという問題があった。分割コアの間にすき間が生じると、分割コア間に磁路が形成されなくなり、回転電機の特性が低下していた。
特開平９−２１９９４３号公報 In such divided cores, generally, the dimensional accuracy of the surface facing the rotor is increased, and tolerances are allowed for the contact surfaces of the divided cores. Since tolerances are allowed on the contact surfaces of the split cores, when the stator core is formed by arranging the split cores in the circumferential direction, a gap due to the tolerance is formed between the contact surfaces of the split cores. There was a problem of being. When a gap occurs between the split cores, a magnetic path is not formed between the split cores, and the characteristics of the rotating electrical machine are deteriorated.
Japanese Patent Laid-Open No. 9-219943

本発明は上記実状に鑑みてなされたものであり、固定子コアに磁路が形成されなくなることが抑えら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 it was suppressed that a magnetic path is no longer formed in a stator core.

上記課題を解決するために本発明者等は分割コア部間に磁路を形成することに関して検討を重ねた結果本発明をなすに至った。   In order to solve the above-mentioned problems, the present inventors have made studies on the formation of a magnetic path between the divided core portions, and as a result, made the present invention.

請求項１に記載の本発明の回転電機の固定子は、分割コア部が周方向の全周にわたって配設されてなり、深さ方向が径方向に一致する複数のスロットを周方向に沿って区画した固定子コアと、スロットに組み付けられた固定子巻線と、を備えた回転電機の固定子であって、分割コア部は、コアバック部と、コアバック部から径方向に突出してスロットを区画するティース部と、を持ち、周方向に隣接した二つの分割コア部のコアバックの間に、二つの分割コア部のそれぞれと磁気的に当接した透磁部を有し、透磁部が、一方のコアバック部の内径側端部近傍と他方のコアバック部の外径側端部近傍とを直線状に接続する形状であることを特徴とする。 In the stator of the rotating electrical machine according to the first aspect of the present invention, the split core portion is disposed over the entire circumference, and a plurality of slots whose depth direction coincides with the radial direction are arranged along the circumferential direction. A stator of a rotating electrical machine including a partitioned stator core and a stator winding assembled to a slot, wherein the split core portion projects from the core back portion and the core back portion in the radial direction. the has a tooth portion for partitioning, between the core back of the two divided core members adjacent in the circumferential direction have respective and magnetically abutting permeable magnet portion of the two divided core members, permeability The portion has a shape in which the vicinity of the inner diameter side end portion of one core back portion and the vicinity of the outer diameter side end portion of the other core back portion are linearly connected .

本発明の回転電機の固定子では、周方向に沿って配置された分割コア部のコアバック部間に、二つのコアバックを磁気的に接続する透磁部を有している。この透磁部が、二つの分割コア部間を通る磁路を形成する。そして、分割コア部間の磁路が形成されないことによる不具合の発生が抑えられる。この結果、本発明の回転電機の固定子は、回転電機として駆動したときに特性の低下が抑えられる。   In the stator of the rotating electrical machine of the present invention, there is a magnetically permeable portion that magnetically connects the two core backs between the core back portions of the divided core portions arranged along the circumferential direction. This magnetic permeability part forms a magnetic path passing between the two divided core parts. And generation | occurrence | production of the malfunction by the magnetic path between division | segmentation core parts not being formed is suppressed. As a result, the stator of the rotating electrical machine of the present invention can be prevented from degrading characteristics when driven as a rotating electrical machine.

請求項２に記載の本発明の回転電機の固定子は、請求項１において、透磁部が、その磁気特性が分割コア部の磁気特性以上であることを特徴とする。このような構成となることで、透磁部を磁気が透過するときに、磁気量が減少すること（磁気損失を生じること）が抑えられ、回転電機として駆動したときに特性の低下が抑えられる。   According to a second aspect of the present invention, the stator of the rotating electrical machine according to the first aspect of the present invention is characterized in that, in the first aspect, the magnetic permeability part has a magnetic characteristic equal to or higher than that of the split core part. With such a configuration, when magnetism is transmitted through the magnetically permeable portion, it is possible to suppress a decrease in the amount of magnetism (causing magnetic loss), and it is possible to suppress deterioration in characteristics when driven as a rotating electrical machine. .

請求項３に記載の本発明の回転電機の固定子は、請求項１〜２のいずれか１項において、透磁部は、周方向に隣接した二つの分割コア部のそれぞれと一体に形成されていることを特徴とする。このような構成となることで、分割コア部の数を減らすことができ、組み付け作業性が向上する。好ましくは、全ての分割コア部が透磁部と一体に形成された構成である。   A stator for a rotating electrical machine according to a third aspect of the present invention is the stator according to any one of the first to second aspects, wherein the magnetically permeable portion is formed integrally with each of the two divided core portions adjacent in the circumferential direction. It is characterized by. With such a configuration, the number of divided core portions can be reduced, and assembling workability is improved. Preferably, all the divided core parts are formed integrally with the magnetically permeable part.

請求項４に記載の本発明の回転電機の固定子は、請求項１〜２のいずれか１項において、透磁部は、周方向に隣接した二つの分割コア部の一方と一体に形成されていることを特徴とする。このような構成となることで、分割コア部の形成を簡単に行うことができる。   A stator for a rotating electrical machine according to a fourth aspect of the present invention is the stator according to any one of the first to second aspects, wherein the magnetically permeable portion is integrally formed with one of the two divided core portions adjacent in the circumferential direction. It is characterized by. With this configuration, the split core portion can be easily formed.

請求項５に記載の本発明の回転電機の固定子は、請求項１〜４のいずれか１項において、固定子巻線は、複数の各相巻線が、固定子コアの周方向で波状をなすように巻回されてなることを特徴とする。このような構成となることで、固定子巻線の製造コストが低減すると共に、電気的接続箇所に腐食等が発生することを低減できる。   A stator of a rotating electrical machine according to a fifth aspect of the present invention is the stator according to any one of the first to fourth aspects, wherein the stator winding has a plurality of phase windings that are wavy in the circumferential direction of the stator core. It is wound so as to form With such a configuration, the manufacturing cost of the stator windings can be reduced, and the occurrence of corrosion or the like at the electrical connection locations can be reduced.

請求項６に記載の本発明の回転電機の固定子は、請求項１〜５のいずれか１項において、透磁部は、一対の分割コア部のコアバック部が圧接していることを特徴とする。このような構成となることで、透磁部とコアバックとの間にすき間が生じることが抑えられる。透磁部は、二つのコアバックに圧縮されたことが好ましい。   A stator of a rotating electrical machine according to a sixth aspect of the present invention is the stator according to any one of the first to fifth aspects, wherein the magnetically permeable portion is in pressure contact with the core back portion of the pair of split core portions. And With such a configuration, it is possible to suppress a gap from being generated between the magnetically permeable portion and the core back. The magnetically permeable portion is preferably compressed into two core backs.

請求項６に記載の本発明の回転電機の固定子は、請求項１〜６のいずれか１項において、分割コア部は、一枚のまたは積層した二枚以上の金属板よりなることを特徴とする。すなわち、従来の分割コア部と同様にして形成することができる。   A stator of a rotating electrical machine according to a sixth aspect of the present invention is the stator according to any one of the first to sixth aspects, wherein the divided core portion is composed of one or two or more stacked metal plates. And That is, it can be formed in the same manner as a conventional split core portion.

また、請求項８に記載の本発明の回転電機は、請求項１〜７のいずれか１項に記載の回転電機の固定子の内周側又は外周側に、周方向に異なる磁極を形成している回転子を備えたことを特徴とする。   According to an eighth aspect of the present invention, the rotating electrical machine according to the present invention has different magnetic poles in the circumferential direction on the inner peripheral side or the outer peripheral side of the stator of the rotating electric machine according to any one of the first to seventh aspects. It is characterized by having a rotor.

本発明の回転電機は、上記した回転電機の固定子を用いてなるものである。そして、上記の固定子が固定子巻線の冷却性に優れたものであることから、本発明の回転電機も、固定子巻線の過熱による特性の低下が抑えられたものとなっている。   The rotating electrical machine of the present invention uses the above-described rotating electrical machine stator. Since the stator described above is excellent in the cooling performance of the stator winding, the rotating electrical machine of the present invention is also suppressed in deterioration of characteristics due to overheating of the stator winding.

以下に本発明の回転電機の固定子および回転電機を、実施の形態を用いてより具体的に説明する。   Hereinafter, the stator of a rotating electrical machine and the rotating electrical machine of the present invention will be described more specifically with reference to embodiments.

（第一参考実施形態）
本参考実施形態の回転電機の構成を図１に示した。本参考実施形態の回転電機１は、略有底筒状の一対のハウジング部材１００，１０１とが開口部同士で接合されてなるハウジング１０と、ハウジング１０に軸受け１１０，１１１を介して回転自在に支承される回転軸２０に固定された回転子２と、ハウジング１０の内部で回転子２を包囲する位置でハウジング１０に固定された固定子３と、を備えている。 ( First reference embodiment )
The configuration of the rotating electrical machine of this reference embodiment is shown in FIG. The rotating electrical machine 1 according to the present embodiment includes a housing 10 in which a pair of substantially bottomed cylindrical housing members 100 and 101 are joined at openings, and the housing 10 is rotatable via bearings 110 and 111. A rotor 2 fixed to a rotating shaft 20 to be supported, and a stator 3 fixed to the housing 10 at a position surrounding the rotor 2 inside the housing 10 are provided.

回転子２は、永久磁石により周方向に交互に異なる磁極を、固定子３の内周側と向き合う外周側に複数形成している。回転子２の磁極の数は、回転電機により異なるため限定されるものではない。   The rotor 2 is formed with a plurality of magnetic poles that are alternately different in the circumferential direction by permanent magnets on the outer peripheral side facing the inner peripheral side of the stator 3. The number of magnetic poles of the rotor 2 is not limited because it varies depending on the rotating electric machine.

固定子３は、図２に示したように、固定子コア３０と、複数の各相巻線から形成される三相の固定子巻線４と、を備えた構成を有している。なお、固定子３において、固定子コア３０と固定子巻線４の間に、両者の電気絶縁性を確保するための絶縁紙を配してもよい。   As shown in FIG. 2, the stator 3 has a configuration including a stator core 30 and a three-phase stator winding 4 formed of a plurality of phase windings. In the stator 3, insulating paper for ensuring electrical insulation between the stator core 30 and the stator winding 4 may be provided.

固定子コア３０は、図３に示したように、内周に複数のスロット３１が形成された円環状を有している。複数のスロット３１は、その深さ方向が径方向と一致するように形成されている。固定子コア３０に形成されたスロット３１の数は、特に限定されるものではない。   As shown in FIG. 3, the stator core 30 has an annular shape in which a plurality of slots 31 are formed on the inner periphery. The plurality of slots 31 are formed such that the depth direction thereof coincides with the radial direction. The number of slots 31 formed in the stator core 30 is not particularly limited.

固定子コア３０は、図４に部分拡大図で示したように、径方向にのびるティース部３２と、ティース部３２の径方向外方でティース部３２を保持・固定する略円筒状のコアバック部３３と、一対のコアバック部３３の間に配された透磁部３４と、から構成される。ティース部３２とコアバック部３３とが分割コア部を構成する。本参考実施形態では、分割コア部を接続する透磁部３４が周方向の全周にわたって形成されている。 As shown in a partially enlarged view in FIG. 4, the stator core 30 includes a teeth portion 32 that extends in the radial direction and a substantially cylindrical core back that holds and fixes the teeth portion 32 radially outward of the teeth portion 32. Part 33 and a magnetically permeable part 34 disposed between the pair of core back parts 33. Teeth part 32 and core back part 33 constitute a split core part . In this reference embodiment , the magnetic permeability part 34 which connects a division | segmentation core part is formed over the perimeter of the circumferential direction.

本参考実施形態の固定子コア３０は、厚さ０．３ｍｍの電磁鋼板を積層して形成されているが、一体の金属で形成してもよい。なお、本参考実施形態では、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 30 of the present embodiment is formed by laminating electromagnetic steel plates having a thickness of 0.3 mm, but may be formed of an integral metal. In this reference embodiment , 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.

ティース部３２は、周方向に隣り合った別のティース部３２との間にスロット３１を区画する。ティース部３２は、その先端面（径方向内方側の先端面）が、回転電機１の固定子コア３０を形成したときに、回転子２に対して所定のギャップを隔てた円弧上に位置するように形成されている。   The tooth part 32 partitions the slot 31 between another tooth part 32 adjacent in the circumferential direction. The teeth portion 32 has a tip surface (a tip surface on the radially inner side) positioned on an arc with a predetermined gap from the rotor 2 when the stator core 30 of the rotating electrical machine 1 is formed. It is formed to do.

コアバック部３３は、二つのティース部３２を径方向内方に突出させた、内周面及び外周面が円弧状をなす略平行四辺形の形状を有する部材である。つまり、コアバック部３３の隣接する別のコアバック部３３との対向面（周方向での端面）は、径方向に対して傾斜している。   The core back portion 33 is a member having a substantially parallelogram shape in which the inner peripheral surface and the outer peripheral surface form an arc shape in which the two teeth portions 32 protrude radially inward. That is, the opposing surface (end surface in the circumferential direction) of the core back portion 33 with another adjacent core back portion 33 is inclined with respect to the radial direction.

透磁部３４は、周方向に隣り合った二つのコアバック部３３の対向面間に、略Ｕ字が幅方向で圧縮された状態で設けられている。この透磁部３４は、周方向に隣り合った二つのコアバック部３３のそれぞれと一体に形成されている。本参考実施形態では、透磁部３４の略Ｕ字が径方向外方に向かって凸となっているが、径方向内方にむかって凸となる形態でも良い。 The magnetic permeability part 34 is provided between the opposing surfaces of the two core back parts 33 adjacent to each other in the circumferential direction in a state where the substantially U-shape is compressed in the width direction. The magnetic permeability part 34 is formed integrally with each of the two core back parts 33 adjacent in the circumferential direction. In this reference embodiment , the substantially U-shaped portion of the magnetically permeable portion 34 is convex outward in the radial direction, but may be convex toward the inner side in the radial direction.

なお、本参考実施形態において、ティース部３２の先端（径方向内方の先端面）を所定の円弧上に配したときに、周方向で隣り合った二つのコアバック部３３の対向面部間には、すき間が形成されるように形成されている。 In addition, in this reference embodiment , when the front-end | tip (radially inner front-end | tip surface) of the teeth part 32 is arrange | positioned on a predetermined circular arc, between the opposing surface parts of the two core back parts 33 adjacent in the circumferential direction Is formed so that a gap is formed.

固定子巻線４は、複数の巻線４０を所定の巻回方法で巻回してなる。固定子巻線４を構成する巻線４０は、図５（Ａ）に示したように、銅またはアルミニウム製の導体４１と、導体４１の外周を覆い導体４１を絶縁する内層４２０及び外層４２１からなる絶縁皮膜４２とから形成されている。内層４２０および外層４２１を合わせた絶縁皮膜４２の厚みは、１００μｍ〜２００μｍの間に設定されている。このように、内層４２０および外層４２１からなる絶縁皮膜４２の厚みが厚いので、巻線４０同士を絶縁するために巻線４０同士の間に絶縁紙等を挟み込んで絶縁する必要がなくなっているが、線材同士を絶縁するために絶縁紙を配してもよい。   The stator winding 4 is formed by winding a plurality of windings 40 by a predetermined winding method. As shown in FIG. 5A, the winding 40 constituting the stator winding 4 includes a copper or aluminum conductor 41, and an inner layer 420 and an outer layer 421 that cover the outer periphery of the conductor 41 and insulate the conductor 41. The insulating film 42 is formed. The thickness of the insulating film 42 including the inner layer 420 and the outer layer 421 is set between 100 μm and 200 μm. As described above, since the insulating film 42 made of the inner layer 420 and the outer layer 421 is thick, it is not necessary to insulate the windings 40 with insulating paper or the like between them. Insulating paper may be provided to insulate the wires from each other.

外層４２１は絶縁材、内層４２０は外層よりもガラス転移温度の高い熱可塑性樹脂またはポリアミドイミド等の絶縁材で形成されている。これにより、回転電機に発生する熱により外層４２１は内層４２０よりも早く軟化するので、同じスロット３１に設置されている巻線４０同士が外層４２１同士で熱接着する。その結果、同じスロット３１に設置されている複数の巻線４０が一体化し巻線４０同士が剛体化するので、スロット３１内の線巻線４０の機械的強度が向上する。また、過剰な振動が発生しても、内層４２０と導体４１の接着箇所よりも内層４２０と外層４２１との接着箇所が先に剥離するので、内層４２０と導体４１との接着を維持し絶縁を確保できる。   The outer layer 421 is formed of an insulating material, and the inner layer 420 is formed of an insulating material such as a thermoplastic resin or a polyamideimide having a glass transition temperature higher than that of the outer layer. As a result, the outer layer 421 is softened faster than the inner layer 420 due to heat generated in the rotating electrical machine, so that the windings 40 installed in the same slot 31 are thermally bonded to each other. As a result, the plurality of windings 40 installed in the same slot 31 are integrated to make the windings 40 rigid, so that the mechanical strength of the wire winding 40 in the slot 31 is improved. In addition, even if excessive vibration occurs, the bonding portion between the inner layer 420 and the outer layer 421 is peeled off before the bonding portion between the inner layer 420 and the conductor 41. Therefore, the adhesion between the inner layer 420 and the conductor 41 is maintained and insulation is maintained. It can be secured.

さらに、固定子巻線４の巻線４０は、図５（Ｂ）に示したように、内層４２０および外層４２１からなる絶縁皮膜４２の外周をエポキシ樹脂等からなる融着材４８で被覆してもよい。これにより、回転電機に発生する熱により融着材４８は絶縁皮膜４２よりも早く溶融するので、同じスロット３１に設置されている複数の巻線４０同士が融着材４８同士により熱接着する。その結果、同じスロット３１に設置されている複数の巻線４０が一体化し巻線４０同士が鋼体化することで、スロット３１の巻線４０の機械的強度が向上する。   Further, as shown in FIG. 5B, the winding 40 of the stator winding 4 is formed by covering the outer periphery of the insulating film 42 made of the inner layer 420 and the outer layer 421 with a fusion material 48 made of epoxy resin or the like. Also good. As a result, the fusion material 48 is melted faster than the insulating film 42 by the heat generated in the rotating electrical machine, so that the plurality of windings 40 installed in the same slot 31 are thermally bonded by the fusion material 48. As a result, the plurality of windings 40 installed in the same slot 31 are integrated to form a steel body between the windings 40, so that the mechanical strength of the winding 40 in the slot 31 is improved.

固定子巻線４を構成する巻線４０の絶縁皮膜４２には、ポリフェニレンサルファイド（ＰＰＳ）よりなる皮膜を用いても良い。   A coating made of polyphenylene sulfide (PPS) may be used for the insulating coating 42 of the winding 40 constituting the stator winding 4.

固定子巻線４は、図６に示したように、それぞれ二本の三相巻線（Ｕ１，Ｕ２，Ｖ１，Ｖ２，Ｗ１，Ｗ２）により形成されている。   The stator winding 4 is formed by two three-phase windings (U1, U2, V1, V2, W1, W2) as shown in FIG.

固定子巻線４は、図７に示したように、複数の巻線４０を所定の形状に巻回してなる。固定子巻線４を構成する巻線４０は、固定子コア３０の内周側で周方向にそって波巻きされた形状で成形されている。そして、固定子コア３０に形成されたスロット３１に収容される直線状のスロット収容部４４と、隣り合ったスロット収容部４４同士を接続するターン部４５と、を備えている。スロット収容部４４は、所定のスロット数（本参考実施形態では３相×２個＝６個）ごとのスロット３１に収容されている。ターン部４５は、固定子コア３０の軸方向の端面から突出して形成されている。 As shown in FIG. 7, the stator winding 4 is formed by winding a plurality of windings 40 in a predetermined shape. The winding 40 constituting the stator winding 4 is formed in a shape that is wave-wound along the circumferential direction on the inner peripheral side of the stator core 30. And the linear slot accommodating part 44 accommodated in the slot 31 formed in the stator core 30 and the turn part 45 which connects adjacent slot accommodating parts 44 are provided. The slot accommodating portions 44 are accommodated in the slots 31 for each predetermined number of slots (3 phases × 2 = 6 in the present embodiment ). The turn portion 45 is formed so as to protrude from the end surface of the stator core 30 in the axial direction.

そして、固定子巻線４は、複数の巻線４０を一方の端部が固定子コア３０の軸方向の端面から突出した状態で、周方向に沿って波状に巻装した状態で形成されている。固定子巻線４の１相は、周方向に沿って波状に巻装された２本の巻線４０を他方の端部同士で接合した構成を有している。１相をなす２本の巻線４０は、同一スロット３１に収容される二つのスロット収容部４４を有する。同一のスロット３１に収容される二つのスロット収容部４４は、周方向で隣り合ったスロット３１の深さ方向での位置が交互に位置するように設置されている。そして、２本の巻線４０は、２本の巻線４０の巻装される方向が反転するスロット収容部４４よりなる折り返し部４６に接合部が形成された構成を有している。   And the stator winding | coil 4 is formed in the state which wound the wave form along the circumferential direction in the state which one end part protruded from the end surface of the axial direction of the stator core 30 with the some coil | winding 40. Yes. One phase of the stator winding 4 has a configuration in which two windings 40 wound in a wave shape along the circumferential direction are joined at the other ends. Two windings 40 forming one phase have two slot accommodating portions 44 accommodated in the same slot 31. The two slot accommodating portions 44 accommodated in the same slot 31 are installed such that the positions in the depth direction of the slots 31 adjacent in the circumferential direction are alternately located. The two windings 40 have a configuration in which a joining portion is formed in a folded portion 46 formed of a slot accommodating portion 44 in which the winding direction of the two windings 40 is reversed.

固定子巻線４は、図８に展開図で示したように、互いに巻装方向が異なる二つの巻線部４０ａ，４０ｂをもつ成形体を各相（Ｕ１，Ｕ２，Ｖ１，Ｖ２，Ｗ１，Ｗ２）ごとに、６組用いて形成されている。二つの巻線部４０ａ，４０ｂのそれぞれは、中性点側の端部および相端子側の端部とは反対の端部側が、スロット収容部４４（折り返し部４６）を介して接続されている。各相の巻線４０の結線方法は同様である。   As shown in a developed view in FIG. 8, the stator winding 4 is formed by forming a molded body having two winding portions 40a and 40b having different winding directions from each other (U1, U2, V1, V2, W1, For each W2), six sets are used. Each of the two winding portions 40a and 40b is connected to the end on the neutral point side and the end opposite to the end on the phase terminal side via the slot accommodating portion 44 (folded portion 46). . The method of connecting the windings 40 of each phase is the same.

固定子巻線４は、図８に展開図を示した成形体を形成し、この成形体を折り返し部４６が軸心側に位置するように所定の巻き数（たとえば、４回）に巻回して製造される。製造された固定子巻線４は、図７に示したように、各相の巻線４０のスロット収容部４４が径方向に並んだ状態で形成されている。このとき、径方向に並んだスロット収容部４４は、固定子巻線４の周方向で小間隔を隔てた状態で位置している。   The stator winding 4 forms a molded body whose development is shown in FIG. 8, and the molded body is wound at a predetermined number of turns (for example, 4 times) so that the folded portion 46 is located on the axial center side. Manufactured. As shown in FIG. 7, the manufactured stator winding 4 is formed in a state in which the slot accommodating portions 44 of the windings 40 of each phase are arranged in the radial direction. At this time, the slot accommodating portions 44 arranged in the radial direction are located in a state of being spaced apart in the circumferential direction of the stator winding 4.

本参考実施形態の回転電機１の固定子３の製造方法を以下に示す。 A method for manufacturing the stator 3 of the rotating electrical machine 1 according to the present embodiment will be described below.

まず、電磁鋼板の積層体よりなり、ティース部３２、コアバック部３３および透磁部３４を備え、ティース部３２の先端部が所定の円弧（固定子コア３０を形成したときの先端部が位置する円弧）よりも拡径した円弧上に位置する成形体を形成する。この成形体は、コアバック部３３および透磁部３４が全周にわたって形成されている。また、透磁部３４は、略Ｕ字が開いた状態となっている。図９に成形体の一部を示した。   First, it is made of a laminated body of electromagnetic steel plates, and includes a teeth portion 32, a core back portion 33, and a magnetically permeable portion 34. The tip portion of the teeth portion 32 is a predetermined arc (the tip portion when the stator core 30 is formed is positioned). Forming a molded body positioned on an arc whose diameter is larger than that of the arc. In this molded body, the core back portion 33 and the magnetically permeable portion 34 are formed over the entire circumference. Further, the magnetically permeable portion 34 is in a substantially U-shaped state. FIG. 9 shows a part of the molded body.

また、巻線４０を用いて固定子巻線４を形成（成形）する。   Further, the stator winding 4 is formed (molded) using the winding 40.

成形体を、固定子巻線４と略同心となる位置に配置する。そして、成形体を縮径していく。この縮径は成形体の軸方向の両端部を規制治具で規制した状態で、円筒状の縮径治具を外挿することで行うことができる。円筒状の縮径治具は、内径が徐々に縮径するように形成された筒状を有している。この縮径治具は、拡径した端部側から縮径した端部側に向かって軸方向に移動する。これにより、成形体の軸方向の端部が、縮径治具の内周面に当接し、スライドするに従って縮径治具の内径が徐々に縮径していることから、縮径治具により成形体の外周面の当接部が径方向内方に押圧され移動する。そして、所定の位置まで縮径治具をスライドさせて、成形体を縮径する。   The molded body is disposed at a position substantially concentric with the stator winding 4. Then, the molded body is reduced in diameter. This diameter reduction can be performed by extrapolating a cylindrical diameter reduction jig in a state where both ends in the axial direction of the molded body are regulated by a regulation jig. The cylindrical diameter reducing jig has a cylindrical shape formed so that the inner diameter gradually decreases. The diameter-reducing jig moves in the axial direction from the enlarged end side toward the reduced end side. As a result, the end of the molded body in the axial direction comes into contact with the inner peripheral surface of the diameter reducing jig, and the inner diameter of the diameter reducing jig gradually decreases as it slides. The contact portion of the outer peripheral surface of the molded body is pressed and moved inward in the radial direction. Then, the diameter reduction jig is slid to a predetermined position to reduce the diameter of the formed body.

縮径治具により成形体が縮径すると、ティース部３２が固定子巻線４のスロット収容部４４の間のすき間に挿入される。そして、この状態で、ティース部３２の先端が所定の円弧上に位置するまで成形体を縮径して、固定子コア３０が製造される。この成形体の縮径時に、略Ｕ字状が開いた状態の透磁部３４は、コアバック部３３巻の距離が近接するにつれて、周方向に圧縮され、最後には、二つのコアバック部３３の間で両者に圧接される。このとき、透磁部３４は略U字状の内周面も密着する。   When the diameter of the formed body is reduced by the diameter reducing jig, the tooth portion 32 is inserted into the gap between the slot accommodating portions 44 of the stator winding 4. In this state, the molded body is reduced in diameter until the tip of the tooth portion 32 is positioned on a predetermined arc, and the stator core 30 is manufactured. When the formed body is reduced in diameter, the magnetically permeable portion 34 in a substantially U-shaped state is compressed in the circumferential direction as the distance of the core back portion 33 turns closer, and finally two core back portions. 33 is pressed against both. At this time, the magnetically permeable portion 34 is also in close contact with the substantially U-shaped inner peripheral surface.

本参考実施形態の固定子コア３０は、本来ならすき間が形成されている二つのコアバック部３３の間に圧接された状態で配された透磁部３４により、二つのコアバック部３３にわたる磁路が形成されている。つまり、磁路が形成されないことによる不具合の発生が抑えられている。この結果、本参考実施形態の回転電機１は、駆動したときに特性の低下が抑えられている。 The stator core 30 of the present embodiment has a magnetic permeability across the two core back portions 33 by a magnetically permeable portion 34 disposed in pressure contact between the two core back portions 33 that are originally formed with gaps. A road is formed. That is, the occurrence of problems due to the absence of a magnetic path is suppressed. As a result, the rotating electrical machine 1 of the present reference embodiment is suppressed from deterioration in characteristics when driven.

さらに、本参考実施形態においては、コアバック部３３がその間にすき間が存在する形状であっても、二つのコアバック３３をまたいだ磁路を形成できる。つまり、コアバック部３３には、高い寸法精度が要求されなくなっている。このことから、固定子コア３０を安価に製造することができ、回転電子１の固定子３及び回転電機を安価に製造することができる。 Furthermore, in this reference embodiment , even if the core back part 33 has a shape with a gap between them, a magnetic path straddling the two core backs 33 can be formed. That is, the core back portion 33 is not required to have high dimensional accuracy. From this, the stator core 30 can be manufactured at low cost, and the stator 3 of the rotating electrons 1 and the rotating electrical machine can be manufactured at low cost.

（第一実施形態）
本実施形態は、透磁部３４の形状が異なること以外は、第一参考実施形態と同様な構成である。 ( First embodiment )
The present embodiment has the same configuration as the first reference embodiment except that the shape of the magnetically permeable portion 34 is different.

本実施形態の透磁部３４は、図１０に示したように、一方のコアバック部３３の内径側端部（ここで、端部とは近傍を含む）と、他方のコアバック部３３の外径側端部（ここで、端部とは近傍を含む）を直線状に接続する形状を有している。 As shown in FIG. 10, the magnetically permeable portion 34 of the present embodiment includes an inner diameter side end portion of one core back portion 33 (here, the vicinity includes an end portion) and the other core back portion 33. The outer diameter side end portion (here, the end portion includes the vicinity) is linearly connected.

本実施形態においても、透磁部３４が二つのコアバック部３３の間の磁路を形成しており、第一参考実施形態と同様な効果を発揮する。 Also in this embodiment, the magnetic permeability part 34 forms the magnetic path between the two core back parts 33, and the same effect as 1st reference embodiment is exhibited.

（第二参考実施形態）
本参考実施形態は、透磁部３４の形状が異なること以外は、第一参考実施形態と同様な構成である。 ( Second reference embodiment )
This reference embodiment has the same configuration as that of the first reference embodiment except that the shape of the magnetically permeable portion 34 is different.

本参考実施形態の透磁部３４は、図１１に示したように、一方のコアバック部３３に略Ｕ字状をなすように形成されている。 As shown in FIG. 11, the magnetically permeable part 34 of the present embodiment is formed in one core back part 33 so as to be substantially U-shaped.

本参考実施形態では、コアバック部３３が透磁部に接続されていないが、固定子コア３０を形成したときには、第一実施形態のときと同様に、透磁部３４が二つのコアバック部３３に圧接されて磁路を形成している。 In this reference embodiment , the core back portion 33 is not connected to the magnetic permeability portion. However, when the stator core 30 is formed, the magnetic permeability portion 34 has two core back portions as in the first embodiment. A magnetic path is formed by pressure contact with 33.

すなわち、本参考実施形態においても、透磁部３４が二つのコアバック部３３の間の磁路を形成しており、第一参考実施形態と同様な効果を発揮する。 That is, also in this reference embodiment , the magnetic permeability part 34 forms the magnetic path between the two core back parts 33, and the same effect as 1st reference embodiment is exhibited.

（変形形態）
上記の各形態では、二つのコアバック部３３の間にすき間が形成されていたが、二つのコアバック部３３の対向面の一部が当接可能に形成されていてもよい。このとき、コアバック部３３同士の当接部は、ティース部３２に近接した位置であることが好ましい。 (Deformation)
In each of the above embodiments, a gap is formed between the two core back portions 33. However, a part of the opposing surfaces of the two core back portions 33 may be formed so as to be able to contact. At this time, the contact portion between the core back portions 33 is preferably a position close to the teeth portion 32.

第一参考実施形態の回転電機の構成を示した図である。It is the figure which showed the structure of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子の構成を示した図である。It is the figure which showed the structure of the stator of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子コアの構成を示した図である。It is the figure which showed the structure of the stator core of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子コアの構成を示した図である。It is the figure which showed the structure of the stator core of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子巻線を構成する各相巻線の構成を示す断面図である。It is sectional drawing which shows the structure of each phase coil | winding which comprises the stator winding | coil of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子巻線の結線を示した図である。It is the figure which showed the connection of the stator winding | coil of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子巻線を示した図である。It is the figure which showed the stator winding | coil of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子巻線の帯状の成形体を示した図である。It is the figure which showed the strip | belt-shaped molded object of the stator winding | coil of the rotary electric machine of 1st reference embodiment . 第一参考実施形態の回転電機の固定子コアの構成を示した図である。It is the figure which showed the structure of the stator core of the rotary electric machine of 1st reference embodiment . 第一実施形態の回転電機の固定子コアの構成を示した図である。It is the figure which showed the structure of the stator core of the rotary electric machine of 1st embodiment . 第二参考実施形態の回転電機の固定子の透磁部の構成を示した図である。It is the figure which showed the structure of the magnetic permeability part of the stator of the rotary electric machine of 2nd reference embodiment .

符号の説明Explanation of symbols

１：回転電機 １０：ハウジング
１１０，１１１：軸受け
２：回転子 ２０：回転軸
３：固定子 ３０：固定子コア
３１：スロット ３２：ティース部
３３：コアバック部 ３４：透磁部
４：固定子巻線 ４０：各相巻線
４１：導体 ４２：絶縁皮膜
４４：スロット収容部
４５：ターン部 ４６：折り返し部 1: rotating electric machine 10: housing 110, 111: bearing 2: rotor 20: rotating shaft 3: stator 30: stator core 31: slot 32: teeth part 33: core back part 34: magnetic permeability part 4: stator Winding 40: Winding for each phase 41: Conductor 42: Insulating film 44: Slot accommodating part 45: Turn part 46: Turned part

Claims (8)

分割コア部が周方向の全周にわたって配設されてなり、深さ方向が径方向に一致する複数のスロットを周方向に沿って区画した固定子コアと、
該スロットに組み付けられた固定子巻線と、
を備えた回転電機の固定子であって、
該分割コア部は、コアバック部と、該コアバック部から径方向に突出して該スロットを区画するティース部と、を持ち、
周方向に隣接した二つの該分割コア部の該コアバックの間に、二つの該分割コア部のそれぞれと磁気的に当接した透磁部を有し、
該透磁部が、一方のコアバック部の内径側端部と他方のコアバック部の外径側端部とを直線状に接続する形状であることを特徴とする回転電機の固定子。 A stator core in which the divided core portion is disposed over the entire circumference in the circumferential direction, and a plurality of slots whose depth direction coincides with the radial direction is partitioned along the circumferential direction;
A stator winding assembled to the slot;
A stator of a rotating electric machine with
The divided core portion has a core back portion and a teeth portion that protrudes in a radial direction from the core back portion and partitions the slot,
Between the core backs of the two divided core portions adjacent to each other in the circumferential direction, a magnetically permeable portion that is in magnetic contact with each of the two divided core portions ,
The stator of a rotating electrical machine, wherein the magnetically permeable portion has a shape that linearly connects an inner diameter side end portion of one core back portion and an outer diameter side end portion of the other core back portion . 前記透磁部は、その磁気特性が前記分割コア部の磁気特性以上である請求項１に記載の回転電機の固定子。   The stator of a rotating electrical machine according to claim 1, wherein the magnetic permeability part has a magnetic characteristic equal to or higher than that of the split core part. 前記透磁部は、周方向に隣接した二つの前記分割コア部のそれぞれと一体に形成されている請求項１〜２のいずれかに記載の回転電機の固定子。   The stator of a rotating electrical machine according to claim 1, wherein the magnetically permeable portion is formed integrally with each of the two divided core portions adjacent in the circumferential direction. 前記透磁部は、周方向に隣接した二つの前記分割コア部の一方と一体に形成されている請求項１〜２のいずれかに記載の回転電機の固定子。   The stator of the rotating electrical machine according to claim 1, wherein the magnetically permeable portion is formed integrally with one of the two divided core portions adjacent in the circumferential direction. 前記固定子巻線は、複数の前記各相巻線が、前記固定子コアの周方向で波状をなすように巻回されてなる請求項１〜４のいずれかに記載の回転電機の固定子。   The stator of a rotating electrical machine according to any one of claims 1 to 4, wherein the stator winding is formed by winding a plurality of each phase winding so as to form a wave shape in a circumferential direction of the stator core. . 前記透磁部は、一対の前記分割コア部の前記コアバック部が圧接している請求項１〜５のいずれかに記載の回転電機の固定子。   The stator of a rotating electrical machine according to any one of claims 1 to 5, wherein the magnetic permeability part is in pressure contact with the core back part of the pair of split core parts. 前記分割コア部は、一枚のまたは積層した二枚以上の金属板よりなる請求項１〜６のいずれかに記載の回転電機の固定子。   The stator of a rotating electrical machine according to any one of claims 1 to 6, wherein the divided core portion is made of one or two or more stacked metal plates. 請求項１〜７のいずれか１項に記載の回転電機の固定子の内周側又は外周側に、周方向に異なる磁極を形成している回転子を備えたことを特徴とする回転電機。   A rotating electrical machine comprising a rotor in which different magnetic poles are formed in a circumferential direction on an inner peripheral side or an outer peripheral side of a stator of the rotating electrical machine according to claim 1.
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