JP2014217105A - Stator for rotary electric machine, and rotary electric machine - Google Patents

Stator for rotary electric machine, and rotary electric machine Download PDF

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JP2014217105A
JP2014217105A JP2013090200A JP2013090200A JP2014217105A JP 2014217105 A JP2014217105 A JP 2014217105A JP 2013090200 A JP2013090200 A JP 2013090200A JP 2013090200 A JP2013090200 A JP 2013090200A JP 2014217105 A JP2014217105 A JP 2014217105A
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stator
neutral point
winding
neutral
rotating electrical
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JP6238554B2 (en
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和明 廣田
Kazuaki Hirota
和明 廣田
啓一郎 岡
Keiichiro Oka
啓一郎 岡
啓介 岡崎
Keisuke Okazaki
啓介 岡崎
達生 川島
Tatsuo Kawashima
達生 川島
秋田　裕之
Hiroyuki Akita
裕之 秋田
利夫 荒井
Toshio Arai
利夫 荒井
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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
    • H02K3/02—Windings characterised by the conductor material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient 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

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost stator for rotary electric machines that can maintain connection quality at a neutral point.SOLUTION: In a stator 1 of a rotary electric machine provided with a stator iron core 2 and rounds of winding 4 each having a plurality of phases and wound around the stator iron core 2 via an insulator 3, each round of winding 4 has neutral point side transition wires 9a to 9c on the connection side of the neutral point 8; any of the neutral point side transition wires 9a to 9c gives rise to no stress relaxation at normal temperature and is formed of an electro-conductive member; the neutral point side transition wires 9a to 9c of different phases are connected at the neutral point 8; and each round of winding 4 is formed of aluminum material elsewhere than the parts of the neutral point side transition wires 9a to 9c.

Description

この発明は、低コストかつ中性点における接続品質を維持することができる回転電機の固定子および回転電機に関するものである。   The present invention relates to a stator for a rotating electrical machine and a rotating electrical machine that can maintain connection quality at a low cost and at a neutral point.

従来の回転電機の固定子は、内周部に沿って複数の磁極歯を有する固定子鉄心と、この固定子鉄心の各磁極歯に絶縁部材であるインシュレータを介して直接巻回される巻線とから構成される固定子において、中性点の接続を目的として、専用の接続端子が使用されているものである（例えば、特許文献１参照）。   A conventional stator of a rotating electrical machine includes a stator core having a plurality of magnetic pole teeth along an inner peripheral portion, and windings that are directly wound around each magnetic pole tooth of the stator core via an insulator as an insulating member Is used for the purpose of connecting a neutral point (for example, see Patent Document 1).

特開２０１２−１５２０２３号公報JP 2012-152023 A

従来の回転電機の固定子および回転電機は、接続に機械的圧力を用いる端子を使用しているため、常温で応力緩和が発生するアルミ線の接続には適用できず、高価な銅線で巻線を構成する必要があるという問題点があった。
そして、アルミ線にも適用可能な接続方法としては、はんだ・ヒュージング・冷間圧接などが挙げられる。しかしながら、端子による接続と比較して、これらの接続方法は接続部の品質管理が難しく、特に３本の線を接続する必要がある中性点では不良が発生しやすいという問題点があった。 Conventional rotating electrical machine stators and rotating electrical machines use terminals that use mechanical pressure for connection, and therefore cannot be applied to aluminum wire connections where stress relaxation occurs at room temperature. There was a problem that it was necessary to construct a line.
Examples of connection methods applicable to aluminum wires include soldering, fusing, and cold welding. However, compared with the connection by the terminal, these connection methods have a problem that quality control of the connection portion is difficult, and in particular, a defect is likely to occur at a neutral point where three wires need to be connected.

この発明は上記のような課題を解決するためになされたものであり、低コストにてかつ中性点における接続品質を維持することができる回転電機の固定子および回転電機を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object thereof is to provide a stator for a rotating electrical machine and a rotating electrical machine that can maintain connection quality at a neutral point at a low cost. And

この発明の回転電機の固定子は、
固定子鉄心と、
上記固定子鉄心に絶縁部材を介して巻回された複数相の各巻線とを備えた回転電機の固定子において、
上記各巻線は、中性点の接続側に中性点側渡り線をそれぞれ有し、
当該各中性点側渡り線は、常温で応力緩和を発生せず、かつ、導電性を有する部材にて形成され、
各相の上記中性点側渡り線は、上記中性点にて接続され、
上記各巻線のうち少なくとも１つは、上記中性点側渡り線以外の箇所がアルミ材にて形成されているものである。 The stator of the rotating electrical machine of the present invention is
A stator core,
In a stator of a rotating electric machine comprising a plurality of windings wound around an insulating member around the stator core,
Each of the windings has a neutral-point crossover on the neutral-point connection side,
Each of the neutral point side crossovers does not generate stress relaxation at room temperature, and is formed of a conductive member,
The neutral point side connecting wire of each phase is connected at the neutral point,
At least one of the windings is formed of an aluminum material at a location other than the neutral crossover wire.

また、この発明の回転電機は、
上記回転電機の固定子と、上記固定子と組み合わせることによりトルクを発生する回転子とを備えたものである。 The rotating electrical machine of the present invention is
A stator of the rotating electric machine and a rotor that generates torque by being combined with the stator are provided.

この発明の回転電機の固定子および回転電機は、上記のように構成されているため、
低コストにてかつ中性点における接続品質を維持することができる。 Since the stator of the rotating electrical machine and the rotating electrical machine of the present invention are configured as described above,
Connection quality at a neutral point can be maintained at a low cost.

この発明の実施の形態１の回転電機の固定子の構成を示す図である。It is a figure which shows the structure of the stator of the rotary electric machine of Embodiment 1 of this invention. 図１に示した回転電機の固定子のインシュレータの構成を示す斜視図である。It is a perspective view which shows the structure of the insulator of the stator of the rotary electric machine shown in FIG. 図１に示した回転電機の固定子の構成を示す正面図である。It is a front view which shows the structure of the stator of the rotary electric machine shown in FIG. この発明の実施の形態２の回転電機の固定子の構成を示す図である。It is a figure which shows the structure of the stator of the rotary electric machine of Embodiment 2 of this invention.

実施の形態１．
以下、本発明の実施の形態について説明する。図１はこの発明の実施の形態１における回転電機の固定子の構成を示す平面図、図２は図１に示した回転電機の固定子のインシュレータの構成を示す斜視図、図３は図１に示した回転電機の固定子の構成を示す正面図である。図において、回転電機の環状の固定子１は、中心方向に等間隔にてそれぞれ突出する９個の磁極歯１４を有する固定子鉄心２と、固定子鉄心２の各磁極歯１４に絶縁部材であるインシュレータ３をそれぞれ介して直接巻回される、ｕ相、ｖ相、ｗ相の３相の各巻線４とから構成される。 Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a plan view showing a configuration of a stator of a rotating electric machine according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a configuration of an insulator of the stator of the rotating electric machine shown in FIG. 1, and FIG. It is a front view which shows the structure of the stator of the rotary electric machine shown in FIG. In the figure, an annular stator 1 of a rotating electric machine is composed of a stator core 2 having nine magnetic pole teeth 14 projecting at equal intervals in the center direction, and an insulating member on each magnetic pole tooth 14 of the stator core 2. Each of the windings 4 is composed of u-phase, v-phase, and w-phase windings 4 that are directly wound through a certain insulator 3.

各巻線４は、中性点８の接続側に中性点側渡り線９ａ、９ｂ、９ｃをそれぞれ有し、各中性点側渡り線９ａ、９ｂ、９ｃは、常温で応力緩和を発生せず、かつ、導電性を有する部材、ここでは銅材にて形成されている。そして、各巻線４の各中性点側渡り線９ａ、９ｂ、９ｃ以外の箇所は、アルミ材にて形成されている。各中性点側渡り線９ａ、９ｂ、９ｃは、絶縁のためスリーブ１０ａ、１０ｂ、１０ｃがそれぞれ被覆されている。但し、異相の巻線４と接触する恐れがない場合は、このスリーブを取り外すことも可能である（例えば、図１の場合であれば、スリーブ１０ｃが省略可能である）。そして、中性点８は、中性点側渡り線９ａ、９ｂ、９ｃが圧着端子１１にて圧着され、接続され構成されている。また、各巻線ｕ３、ｖ３、ｗ３の巻線端末６ｆ、６ｇ、６ｈと、各中性点側渡り線９ａ、９ｂ、９ｃとは、それぞれアルミ材と銅材とにて形成されているため、冷間圧接部７ｂ、７ｃ、７ｄを介してそれぞれ接続されている。   Each winding 4 has a neutral point side connecting wire 9a, 9b, 9c on the connection side of the neutral point 8, respectively, and each neutral point side connecting wire 9a, 9b, 9c generates stress relaxation at room temperature. In addition, it is made of a conductive member, here a copper material. And the places other than each neutral point side connecting wire 9a, 9b, 9c of each coil | winding 4 are formed with the aluminum material. Each neutral-point crossover wire 9a, 9b, 9c is covered with a sleeve 10a, 10b, 10c for insulation. However, this sleeve can be removed when there is no risk of contact with the winding 4 of the different phase (for example, in the case of FIG. 1, the sleeve 10c can be omitted). The neutral point 8 is configured by connecting the neutral point side connecting wires 9a, 9b, and 9c with the crimp terminals 11 and connecting them. In addition, since the winding terminals 6f, 6g, 6h of the windings u3, v3, w3 and the neutral-point connecting wires 9a, 9b, 9c are formed of an aluminum material and a copper material, respectively. They are connected via cold pressure contact portions 7b, 7c and 7d, respectively.

固定子鉄心２は、磁極歯１４毎に分割された分割鉄心１５により構成される分割型の固定子鉄心である。各分割鉄心１５は、複数枚の磁性板材等を積層してなり、周方向に伸びる継鉄部１６と、継鉄部１６の中央部分から中心方向に突出する磁極歯１４とをそれぞれ備えている。このような分割鉄心１５を９個環状に配置し、隣接する分割鉄心１５の継鉄部１６同士を連結部１７により回動自在に連結することで、固定子鉄心２が構成されている。尚、ここでは便宜上、磁極歯１４の数を９個の例にて示しているが、それ以外の数であってもよい。また、固定子鉄心２は連結部１７において回動自在に形成された例を示しているが、固定子鉄心の構造は回動自在に形成されていない構造でもよく、例えば、継鉄部１６が分割されていない固定子鉄心、または、継鉄部１６が分割されかつ連結部１７を有していない固定子鉄心、または、連結部１７が回動自在ではなく薄肉で接続された固定子鉄心等、様々な構造の固定子鉄心に対して本発明は適用可能である。   The stator core 2 is a split-type stator core composed of split cores 15 that are split for each magnetic pole tooth 14. Each divided iron core 15 is formed by laminating a plurality of magnetic plates and the like, and includes a yoke portion 16 extending in the circumferential direction and magnetic pole teeth 14 projecting in the center direction from the central portion of the yoke portion 16. . The stator core 2 is configured by arranging nine such split cores 15 in an annular shape and connecting the yoke portions 16 of the adjacent split cores 15 so as to be rotatable by a connecting portion 17. Here, for convenience, the number of magnetic pole teeth 14 is shown as an example of nine, but other numbers may be used. Moreover, although the stator core 2 shows the example formed in the connection part 17 so that rotation is possible, the structure of a stator core may not be formed so that rotation is possible, for example, the yoke part 16 is provided. An undivided stator core, a stator core in which the yoke portion 16 is divided and does not have the connecting portion 17, or a stator core in which the connecting portion 17 is not rotatable but connected in a thin wall, etc. The present invention can be applied to stator cores having various structures.

インシュレータ３は、一対で構成され、例えばプラスチック樹脂成形により作成される。そして、インシュレータ３は、固定子鉄心２の磁極歯１４の積層方向の上下両側から磁極歯１４を覆うようにそれぞれ装着されている。図２において、この一対のインシュレータ３のうち一方側（上側）のインシュレータ３について説明する。インシュレータ３は、磁極歯１４の固定子１の軸方向端面と側面の一部とを覆う巻回部１８を有し、巻線４は巻回部１８上に巻回される。   The insulator 3 is configured as a pair, and is formed by plastic resin molding, for example. And the insulator 3 is each mounted | worn so that the magnetic pole tooth 14 may be covered from the up-and-down both sides of the lamination direction of the magnetic pole tooth 14 of the stator core 2. As shown in FIG. In FIG. 2, the insulator 3 on one side (upper side) of the pair of insulators 3 will be described. The insulator 3 has a winding part 18 that covers the axial end surface of the stator 1 of the magnetic pole teeth 14 and a part of the side surface, and the winding 4 is wound on the winding part 18.

また、巻回部１８の両端には、磁極歯１４に巻回された巻線４の巻線崩れを防止するための巻壁が設けられており、磁極歯１４の根元側（径方向外側）に位置する巻壁を第１巻壁部１９、磁極歯１４の先端側（径方向内側）に位置する巻壁を第２巻壁部２０とする。第１巻壁部１９の背面（径方向外側面）には、巻回部１８と各磁極歯１４に巻回された巻線４同士を繋ぐ渡り線２１を収納するための、少なくとも巻線４の直径よりも広く、互いに交わらない３つの背面溝１２ａ、１２ｂ、１２ｃがそれぞれ設けられている。ここでは、上側から１段目の背面溝１２ａ、２段目の背面溝１２ｂ、３段目の背面溝１２ｃとしている。図２において省略されている下側のインシュレータ３（上側のインシュレータ３と対になる部分）の構成は、基本的に上側のインシュレータ３と同様である。但し、下側には渡り線２１が配置されないため、背面溝を設ける必要はない。   Further, at both ends of the winding portion 18, winding walls for preventing the winding 4 wound around the magnetic pole teeth 14 from being collapsed are provided, and the root side (radially outer side) of the magnetic pole teeth 14 is provided. The winding wall located at the first winding wall portion 19 is referred to as the first winding wall portion 19, and the winding wall located at the tip side (radially inside) of the magnetic pole teeth 14 is referred to as the second winding wall portion 20. On the back surface (radial outer side surface) of the first winding wall portion 19, at least the winding 4 for storing the connecting wire 21 that connects the winding portions 18 and the windings 4 wound around the magnetic pole teeth 14. Three rear grooves 12a, 12b, 12c that are wider than each other and do not cross each other are provided. Here, the first-stage rear groove 12a, the second-stage rear groove 12b, and the third-stage rear groove 12c from the upper side are used. The configuration of the lower insulator 3 (part that is paired with the upper insulator 3) omitted in FIG. 2 is basically the same as that of the upper insulator 3. However, since the connecting wire 21 is not disposed on the lower side, it is not necessary to provide a back surface groove.

巻線４は、インシュレータ３を介して各磁極歯１４にそれぞれ巻回されている。ここでは、巻線４は、各磁極歯１４の径方向外側から巻始められ、１層目、２層目、・・・、ｎ層目と順に巻回された後、径方向外側の所定位置で巻き終わるように巻かれている。このため、巻線４の巻始めと巻き終わりとの巻線端末は各磁極歯１４の径方向外側からそれぞれ突出している。また、巻線４は、３相の各相３個ずつ、合計９個のｕ相の巻線ｕ１、ｕ２、ｕ３、ｖ相の巻線ｖ１、ｖ２、ｖ３、ｗ相の巻線ｗ１、ｗ２、ｗ３が、回転方向にｕ相、ｖ相、ｗ相の順で繰り返しそれぞれ配置されている。そして、各巻線ｕ１〜ｗ３はアルミ線で構成されている。   The winding 4 is wound around each magnetic pole tooth 14 via the insulator 3. Here, the winding 4 starts to be wound from the outside in the radial direction of each magnetic pole tooth 14 and is wound in order of the first layer, the second layer,. It is wound to end with. For this reason, the winding terminals of the winding start and the winding end of the winding 4 protrude from the radially outer side of each magnetic pole tooth 14. The winding 4 is composed of three three-phase phases, a total of nine u-phase windings u1, u2, u3, v-phase windings v1, v2, v3, and w-phase windings w1, w2. , W3 are repeatedly arranged in the rotation direction in the order of u phase, v phase, and w phase. And each winding u1-w3 is comprised with the aluminum wire.

そして、固定子１においては、巻線ｕ１と巻線ｕ２と間は、渡り線２１が存在する。この渡り線２１は、巻線ｕ１の巻線端末６ａと、巻線ｕ２の巻線端末６ｂとが冷間圧接によって接続されることで構成されている。他の巻線間も巻線ｕ１と巻線ｕ２と同様の構成で渡り線が構成されている。そしてこれら渡り線２１はインシュレータ３の背面溝１２ａ〜１２ｃに収納される。   In the stator 1, the crossover wire 21 exists between the winding u <b> 1 and the winding u <b> 2. The connecting wire 21 is formed by connecting the winding terminal 6a of the winding u1 and the winding terminal 6b of the winding u2 by cold welding. Crossover wires are configured between the other windings in the same configuration as the windings u1 and u2. These crossover wires 21 are accommodated in the rear grooves 12 a to 12 c of the insulator 3.

ここで、渡り線２１をインシュレータ３の背面溝１２ａ〜１２ｃに収納する方法について図３に基づいて説明する。渡り線２１は背面溝１２ａ〜１２ｃに階段状に配置されている。具体的には、例えば巻線ｕ１と巻線ｕ２と間の渡り線２１の場合、巻線ｖ１が巻回されているインシュレータ３の背面溝１２ａ、巻線ｗ１が巻回されているインシュレータ３の背面溝１２ｂ、巻線ｕ２が巻回されているインシュレータ３の背面溝１２ｃに順次収納されていく。このように、背面溝１２ａ〜１２ｃに収納することにより、渡り線２１同士が互いに接触することはなく、各相間の絶縁性を確保することができる。また、各相ｕ１、ｖ１、ｗ１の巻線端末６ｃ、６ｄ、６ｅは外部の電源に接続される。   Here, a method for housing the crossover wire 21 in the rear grooves 12a to 12c of the insulator 3 will be described with reference to FIG. The crossover wire 21 is arranged in a stepped manner in the rear grooves 12a to 12c. Specifically, for example, in the case of the connecting wire 21 between the winding u1 and the winding u2, the back groove 12a of the insulator 3 around which the winding v1 is wound, and the insulator 3 around which the winding w1 is wound. The rear groove 12b and the winding u2 are sequentially housed in the rear groove 12c of the insulator 3 around which the winding u2 is wound. Thus, by accommodating in the back surface grooves 12a-12c, the crossover wires 21 do not contact each other, and the insulation between each phase is securable. In addition, the winding terminals 6c, 6d, 6e of each phase u1, v1, w1 are connected to an external power source.

そして、回転電機は、上記に示した回転電機の固定子と、固定子と組み合わせることによりトルクを発生する回転子とを備える。このことは、以下の実施の形態においても同様であるため、その説明は適宜省略する。   The rotating electrical machine includes the above-described stator of the rotating electrical machine and a rotor that generates torque when combined with the stator. Since this is the same in the following embodiments, the description thereof will be omitted as appropriate.

上記のように構成された実施の形態１の回転電機の固定子および回転電機は、大量の材料が必要となる巻線の部分は低コストで形成することができるアルミ材にて形成し、中性点側の巻線端末の中性点側渡り線には、結線品質に優れた材質、すなわち、常温で応力緩和を発生せずかつ導電性を有する部材を使用する。このため、コスト削減と同時に結線品質の向上とを両立することができる。   The stator and the rotating electric machine of the rotating electric machine according to the first embodiment configured as described above are formed of an aluminum material that can be formed at a low cost at a winding portion that requires a large amount of material. A material having excellent connection quality, that is, a member that does not cause stress relaxation at room temperature and has conductivity, is used for the neutral point-side jumper at the winding point on the property point side. For this reason, it is possible to achieve both cost reduction and improvement in connection quality.

また、中性点側渡り線を銅材で構成することにより、巻線を安価なアルミ材を使用することによるコスト削減の効果を得つつ、中性点において既存の接続方法を流用することが可能となり、中性点における接続品質をさらに向上することができる。   In addition, it is possible to divert the existing connection method at the neutral point while configuring the neutral point crossover wire with copper material and obtaining the effect of cost reduction by using an inexpensive aluminum material for the winding. It becomes possible, and the connection quality at the neutral point can be further improved.

尚、上記実施の形態１においては、各巻線の中性点側渡り線以外の箇所を全てアルミ材にて形成する例を示したが、これに限られることはなく、各巻線のうち少なくとも１つが、中性点側渡り線以外の箇所がアルミ材にて形成されていれば、コスト削減と同時に結線品質の向上ができる。   In the first embodiment, an example is shown in which all the portions other than the neutral crossover wires of each winding are made of aluminum. However, the present invention is not limited to this, and at least one of the windings is not limited thereto. On the other hand, if the portion other than the neutral crossover wire is made of an aluminum material, the cost can be reduced and the connection quality can be improved.

また、固定子は巻線間の接続方法として冷間圧接を、中性点での接続方法として圧着端子を用いているが、本発明はこれらの接続方法に限定されるものではなく、接続する線のうち少なくとも１本以上がアルミ線の箇所ならば、ヒュージングやはんだ、冷間圧接等が適用可能である。また、接続する線の全てが銅線ならば、ヒュージングやはんだ、冷間圧接に加え、圧着端子のような応力を用いる接続端子による接続が可能である。   In addition, the stator uses cold pressure welding as a connection method between windings and a crimp terminal as a connection method at a neutral point, but the present invention is not limited to these connection methods and is connected. If at least one of the wires is an aluminum wire, fusing, solder, cold welding or the like can be applied. Further, if all of the wires to be connected are copper wires, in addition to fusing, solder, and cold welding, connection by a connection terminal using stress such as a crimp terminal is possible.

実施の形態２．
図４は本発明の実施の形態２における回転電機の固定子の構成を示す平面図である。上記実施の形態１では、中性点８における接続には、中性点側渡り線９ａ、９ｂ、９ｃと、スリーブ１０ａ、１０ｂ、１０ｃと、圧着端子１１とを用いて構成する例を示したが、これに限られることはなく、これらの箇所を、図４に示すように１つの部品、中性点８から各相の中性点側渡り線９ａ、９ｂ、９ｃが３本に分離された中性点端子１３にて構成してもよい。このとき、中性点端子１３の材質は、常温で応力緩和を発生せずかつ導電性を有する部材であれば何れでもよい。例えば、板金部品で使用されるような鋼材にて構成する。 Embodiment 2. FIG.
FIG. 4 is a plan view showing the configuration of the stator of the rotating electrical machine according to the second embodiment of the present invention. In the first embodiment, an example in which the connection at the neutral point 8 is configured using the neutral point-side connecting wires 9a, 9b, and 9c, the sleeves 10a, 10b, and 10c, and the crimp terminal 11 is shown. However, the present invention is not limited to this, and as shown in FIG. 4, these parts are separated into three parts from one part, the neutral point 8, to the neutral point side connecting lines 9 a, 9 b, 9 c of each phase. Alternatively, the neutral point terminal 13 may be used. At this time, the material of the neutral point terminal 13 may be any member as long as it does not cause stress relaxation at room temperature and has conductivity. For example, it is made of a steel material used for sheet metal parts.

上記のように構成された実施の形態２の回転電機の固定子によれば、上記実施の形態１と同様の効果を奏するとともに、部品点数を減らすと同時に、組立工数を削減することができるため、直材費と加工費との両方を削減することができる。また、この中性点端子の部材を銅材にて形成するようにすれば、巻線端末と中性点端子の接続に追加部材が不要な冷間圧接を適用することができるため、さらに直材費を低減することができる。   According to the stator of the rotating electrical machine of the second embodiment configured as described above, the same effects as those of the first embodiment can be obtained, and the number of parts can be reduced and the number of assembly steps can be reduced. Both direct material costs and processing costs can be reduced. Further, if this neutral point terminal member is made of copper, cold welding that does not require additional members can be applied to the connection between the winding terminal and the neutral point terminal. Material costs can be reduced.

尚、本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略することが可能である。   It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

１ 固定子、２ 固定子鉄心、３ インシュレータ、４ 巻線、
６ａ〜６ｈ 巻線端末、７ａ〜７ｄ 冷間圧接部、８ 中性点、
９ａ〜９ｃ 中性点側渡り線、１０ａ〜１０ｃ スリーブ、１１ 圧着端子、
１２ａ〜１２ｃ 背面溝、１３ 中性点端子、１４ 磁極歯、１５ 分割鉄心、
１６ 継鉄部、１７ 連結部、１８ 巻回部、１９ 第１巻壁部、２０ 第２巻壁部、
２１ 渡り線。 1 Stator, 2 Stator core, 3 Insulator, 4 windings,
6a-6h Winding end, 7a-7d Cold weld, 8 Neutral point,
9a-9c Neutral point crossover wire, 10a-10c sleeve, 11 Crimp terminal,
12a to 12c Back groove, 13 Neutral point terminal, 14 Magnetic pole teeth, 15 Divided iron core,
16 yoke parts, 17 connecting parts, 18 winding parts, 19 first winding wall part, 20 second winding wall part,
21 Crossover.

Claims (5)

固定子鉄心と、
上記固定子鉄心に絶縁部材を介して巻回された複数相の各巻線とを備えた回転電機の固定子において、
上記各巻線は、中性点の接続側に中性点側渡り線をそれぞれ有し、
当該各中性点側渡り線は、常温で応力緩和を発生せず、かつ、導電性を有する部材にて形成され、
各相の上記中性点側渡り線は、上記中性点にて接続され、
上記各巻線のうち少なくとも１つは、上記中性点側渡り線以外の箇所がアルミ材にて形成されている回転電機の固定子。 A stator core,
In a stator of a rotating electric machine comprising a plurality of windings wound around an insulating member around the stator core,
Each of the windings has a neutral-point crossover on the neutral-point connection side,
Each of the neutral point side crossovers does not generate stress relaxation at room temperature, and is formed of a conductive member,
The neutral point side connecting wire of each phase is connected at the neutral point,
At least one of the windings is a stator of a rotating electrical machine in which a portion other than the neutral-point crossover wire is formed of an aluminum material. 上記各中性点側渡り線は、銅材にて形成されている請求項１に記載の回転電機の固定子。 The stator for a rotating electrical machine according to claim 1, wherein each of the neutral point-side connecting wires is formed of a copper material. 上記各中性点側渡り線は、上記中性点から上記各相に分離され形成された１つの部品にて構成される請求項１または請求項２に記載の回転電機の固定子。 The stator of a rotating electrical machine according to claim 1 or 2, wherein each of the neutral point-side connecting wires is composed of a single component that is separated from the neutral point into the phases. 上記各巻線の上記各中性点側渡り線部分以外の箇所は、全てアルミ材にて形成されている請求項１から請求項３のいずれか１項に記載の回転電機の固定子。 The stator of the rotating electrical machine according to any one of claims 1 to 3, wherein all portions of the windings other than the neutral point side crossover portions are formed of an aluminum material. 請求項１から請求項４のいずれか１項の回転電機の固定子と、上記固定子と組み合わせることによりトルクを発生する回転子とを備えた回転電機。 A rotating electrical machine comprising the stator of a rotating electrical machine according to any one of claims 1 to 4 and a rotor that generates torque by being combined with the stator.
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