JP2014212638A

JP2014212638A - Stator of dynamo-electric machine

Info

Publication number: JP2014212638A
Application number: JP2013088110A
Authority: JP
Inventors: 隆鴇沢; Takashi Tokizawa
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2013-04-19
Filing date: 2013-04-19
Publication date: 2014-11-13

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a dynamo-electric machine including a stator wiring having a coil end structure of good ventilation, while using one kind of conductor segment.SOLUTION: A conductor segment S is constituted of a plurality of split flat conductors Sa, Sb having such a dimensional relationship W>T as the thickness T is larger than the width W. Conductor insertion parts 311, 321 are formed by superposing the plurality of split flat conductors Sa, Sb circumferentially in the thickness T direction, for the slot 21 of the stator core 20, and the plurality of split flat conductors Sa, Sb are separated each other at oblique conductor portions 313, 323, 333 forming coil end groups 30a, 30b, thus forming a gap P for ventilation. Consequently, the coil end groups 30a, 30b can have a structure of good ventilation.

Description

本発明は、自動車等の車両に搭載され、電動機（高電圧高出力モータ）や交流発電機（オルタネータ）として使用される回転電機の固定子に関するもので、詳しくは、円環状固定子鉄心に巻装される固定子巻線、特に、導体セグメント接合型の固定子巻線の改良構造に関する。 The present invention relates to a stator of a rotating electric machine that is mounted on a vehicle such as an automobile and used as an electric motor (high voltage high output motor) or an alternator (alternator), and more specifically, is wound around an annular stator core. The present invention relates to an improved structure of a stator winding to be mounted, in particular, a conductor segment junction type stator winding.

〔従来の技術〕
従来から、車両用交流発電機等の回転電機では、固定子に種々なタイプの固定子巻線が採用されてきたが、素線として平角導線を用いる固定子巻線が主流となっている。なかでも、固定子鉄心のスロットに整列して配置される複数の電気導体を固定子鉄心の端部から軸方向に突出したところで接合して巻線を構成する導体セグメント接合型の固定子巻線が、導体の占積率向上を図れ、コンパクトなコイルエンドを実現できる好適な構造として、専ら実用に供されている。 [Conventional technology]
Conventionally, various types of stator windings have been adopted as a stator in a rotating electrical machine such as an AC generator for a vehicle. However, stator windings using a rectangular conductor as a strand are mainly used. In particular, a conductor segment-junction type stator winding in which a plurality of electric conductors arranged in alignment with the slots of the stator core are joined in the axial direction from the end of the stator core to form a winding. However, as a suitable structure capable of improving the space factor of the conductor and realizing a compact coil end, it is exclusively used in practical use.

このような導体セグメント接合型の固定子巻線は、例えば、特許文献１に開示されているもので、次のような具体的構造を有している。
導体セグメントとして、２本の直線部をＵ字部で連結した所謂Ｕ字状導体セグメントを用い、そのＵ字部を捩りながら広げて２本の直線部を固定子鉄心の異なるスロットに挿通するとともに、スロットより突出する残部の導体突出部分を固定子鉄心の周方向へ傾けて斜行部（斜状導体部）を形成しておき、その後、各スロットの径方向に複数層に積層される他の導体セグメントとの関係において、斜行部（斜状導体部）先端側の２つの導体端部を対となる導体セグメントの導体端部とそれぞれ組合わせて端部対を形成し、この端部対を溶接により接合することで、コイルエンド群を形成するとともに、連続した所望の巻線を構築するものである。 Such a conductor segment junction type stator winding is disclosed in, for example, Patent Document 1 and has the following specific structure.
As a conductor segment, a so-called U-shaped conductor segment in which two straight portions are connected by a U-shaped portion is used. The U-shaped portion is expanded while twisting, and the two straight portions are inserted into different slots of the stator core. In addition, the remaining conductor protruding portion protruding from the slot is inclined in the circumferential direction of the stator core to form a skewed portion (an inclined conductor portion), and then stacked in a plurality of layers in the radial direction of each slot. In relation to the conductor segment, the two conductor end portions on the leading end side of the slant portion (slanted conductor portion) are combined with the conductor end portions of the pair of conductor segments to form an end pair. By joining the pairs by welding, a coil end group is formed and a desired continuous winding is constructed.

ところで、近年、この種の回転電機には、小型・高性能化の要求がますます厳しくなってきており、回転子、固定子等の構成部品個々に対しても、当然のことながらかかる要求に資する改善追究がなされている。
ことに、回転電機では、小型化あるいは高出力化するに際して、固定子巻線からの発熱が常に問題視されている。そのため、現状の大きさのままの回転電機で或いは一層小型の回転電機で高出力化を達成する効果的な手段として、固定子巻線の冷却効率を向上させる技術が創案され、例えば、車両用交流発電機（オルタネータ）においては、冷却ファンを内蔵し、ハウジング内に積極的に導入する冷却風によって固定子巻線を冷却するようになっている。 By the way, in recent years, this kind of rotating electrical machine has become more and more demanding of miniaturization and high performance, and naturally, such a request is made to individual components such as rotors and stators. There is a search for improvement that will help.
In particular, in a rotating electrical machine, heat generation from a stator winding is always regarded as a problem when the size is reduced or the output is increased. Therefore, as an effective means for achieving high output with a rotating electrical machine of the current size or with a smaller rotating electrical machine, a technique for improving the cooling efficiency of the stator winding has been invented, for example, for a vehicle. In the AC generator (alternator), a cooling fan is built in, and the stator winding is cooled by cooling air positively introduced into the housing.

つまり、冷却ファンを回転子に取付けるとともに、ハウジングに通風窓を設けることにより、回転子が回転する運転中は、ハウジング内に吸入された空気が固定子巻線のコイルエンド群を通過して排出されるようにし、固定子巻線を強制冷却するわけである。
しかしながら、導体セグメント接合型の固定子巻線は、固定子鉄心の両端部から軸方向に突出するコイルエンド群が密に束状になっているため、ここに冷却空気を強制送風しても固定子巻線内への通風性が悪く、冷却効率がさほど高くならない。 In other words, by installing the cooling fan on the rotor and providing a ventilation window in the housing, the air sucked into the housing passes through the coil end group of the stator winding and is discharged during the rotation of the rotor. Thus, the stator winding is forcibly cooled.
However, the conductor segment junction type stator winding has a coil end group that protrudes in the axial direction from both ends of the stator core in a tightly bundled form, so it is fixed even if forced cooling air is blown here. Ventilation into the child winding is poor and cooling efficiency is not so high.

そこで、固定子巻線のコイルエンド群の通風性を改善する構造が種々検討され、例えば、上記特許文献１の回転電機のごとく、一方の導体セグメントの斜行部と他方の導体セグメントの斜行部との間に隙間を設ける提案がなされている。

ところが、上記構造の固定子巻線は、固定子鉄心の径方向に重なる導体セグメントの斜行部の突出高さ（軸方向長）をそれぞれ異ならせるものであり、２種類以上の導体セグメントを必要とするため、製造面で問題があった。
したがって、このような導体セグメント接合型の固定子巻線において、更なる改良を加え、製造上有利で、かつ、通風性の良いコイルエンド群構造を如何にして得るかが当業者の共通の課題となっている。
本発明者は、種々の実験・研究を重ね、かかる課題を解決するための具体的手段を探究した結果、導体セグメント接合型の基本構成自体を積極的に活用しながら、上記要求に資する構造の固定子巻線を実現可能な方策を突き止めた。 Therefore, various structures for improving the air permeability of the coil end group of the stator winding have been studied. For example, as in the rotating electrical machine described in Patent Document 1, the skewed portion of one conductor segment and the skewed of the other conductor segment. Proposals have been made to provide a gap between the two parts.

However, the stator winding having the above structure is such that the projecting heights (axial lengths) of the skewed portions of the conductor segments overlapping in the radial direction of the stator core are different, and two or more types of conductor segments are required. Therefore, there was a problem in terms of manufacturing.
Therefore, it is a common problem for those skilled in the art how to obtain a coil end group structure that is further improved in manufacture and advantageous in ventilation in such a conductor segment junction type stator winding. It has become.
The present inventor has conducted various experiments and researches and has explored specific means for solving such problems. As a result, the present inventor has a structure that contributes to the above requirements while actively utilizing the basic structure of the conductor segment junction type. We have found a way to realize a stator winding.

特開平１１−１６４５１９号公報JP 11-164519 A

本発明は、上記の事情に鑑みてなされたものであって、その目的は、導体セグメント接合型の固定子巻線において、導体セグメントを形成する素線自体の構造を工夫することにより、導体セグメントの種類を増やすことのない製造面での優位性を確保しながら、通風性の良いコイルエンド群構造を有する固定子巻線を実現し、回転電機の一層の小型化・性能向上に資する固定子を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a conductor segment by devising a structure of a wire itself forming a conductor segment in a conductor segment junction type stator winding. A stator that contributes to further miniaturization and improved performance of rotating electrical machines by realizing a stator winding with a coil end group structure with good ventilation while ensuring superiority in manufacturing without increasing the number of types Is to provide.

〔請求項１の手段〕
請求項１に記載の発明は、内周側にスロットを有する円環状の固定子鉄心と、固定子鉄心に巻装される固定子巻線とを備え、固定子巻線が平角導線を素線とする導体セグメントを複数本連続的に接合して構成されている回転電機の固定子であって、導体セグメント自体を、幅Ｗより厚みＴが小さいＷ＞Ｔの寸法関係を有する複数枚の分割平角導線で構成している。
そして、この導体セグメントは、スロットに対し、複数枚の分割平角導線が厚みＴ方向で固定子鉄心の周方向に重ねて挿通されるとともに幅Ｗ方向が固定子鉄心の径方向に沿って配置される導体挿通部と、一端が導体挿通部に連なり、スロットから軸方向に突出したところで、厚みＴ方向に折曲される曲がり部と、この曲がり部の他端に連なり、固定子鉄心に対して周方向に斜行状態を呈する斜状導体部とを有していて、斜状導体部には、複数枚の分割平角導線が相互に離隔することで、通風用の隙間が設けられていることを特徴としている。 [Means of Claim 1]
The invention described in claim 1 includes an annular stator core having a slot on the inner peripheral side, and a stator winding wound around the stator core, and the stator winding is a flat wire. A stator of a rotating electrical machine configured by continuously joining a plurality of conductor segments to each other, wherein the conductor segment itself is divided into a plurality of pieces having a dimensional relationship of W> T having a thickness T smaller than the width W It consists of a flat wire.
In the conductor segment, a plurality of divided rectangular conductors are inserted into the slot in the thickness T direction so as to overlap the circumferential direction of the stator core, and the width W direction is arranged along the radial direction of the stator core. A conductor insertion portion, one end of which is connected to the conductor insertion portion, protrudes in the axial direction from the slot, is bent to a thickness T direction, is connected to the other end of the bent portion, and is connected to the stator core. A slanted conductor portion that is inclined in the circumferential direction, and the slanted conductor portion is provided with a gap for ventilation by separating a plurality of divided rectangular conductor wires from each other. It is characterized by.

上記構成を有する本発明によれば、固定子巻線のコイルエンド群をなす斜状導体部分に冷却用の通風路を形成できるため、コイルエンド群自体を風通しの良い構造とすることができ、固定子巻線の冷却効率を向上することができる。 According to the present invention having the above configuration, since the cooling air passages can be formed in the oblique conductor portions forming the coil end group of the stator winding, the coil end group itself can have a structure with good ventilation, The cooling efficiency of the stator winding can be improved.

特に、導体セグメント接合型の固定子巻線において、コイルエンド群に通風路を形成するにもかかわらず、導体セグメント自体を１種類にすることができ、しかも、導体セグメントを構成する複数枚の分割平角導線を相互に離隔させるだけで、所望の通風路を形成できるため、種々な要求性能にも容易に対応することができる。
加えて、導体セグメントは、固定子鉄心のスロットに対し、複数枚の分割平角導線を厚みＴ方向で固定子鉄心の周方向に重ねて挿通する（したがって幅Ｗ方向を固定子鉄心の径方向に沿って配置する）ことで導体挿通部を形成し、かつ、幅Ｗより薄い厚みＴ方向に折曲して斜状導体部を形成しているため、複数枚の分割平角導線を幅Ｗ方向が固定子鉄心の周方向になるように配置し幅Ｗ方向に折曲する場合に比して、曲がり部を種々な曲率で曲げ易く、種々な形態の通風路を容易に形成することができる。 In particular, in a conductor segment junction type stator winding, the conductor segment itself can be made one type despite the formation of a ventilation path in the coil end group, and moreover, a plurality of pieces constituting the conductor segment can be divided. Since a desired ventilation path can be formed only by separating the flat conducting wires from each other, it is possible to easily cope with various required performances.
In addition, the conductor segment is inserted into the slot of the stator core by overlapping a plurality of divided rectangular conductor wires in the thickness T direction in the circumferential direction of the stator core (thus, the width W direction is the radial direction of the stator core). The conductor insertion portion is formed, and the slanted conductor portion is formed by bending in the thickness T direction thinner than the width W. Compared with the case where the stator core is arranged in the circumferential direction and bent in the width W direction, the bent portion can be easily bent with various curvatures, and various forms of ventilation paths can be easily formed.

よって、製造面で有利な導体セグメントを自在に活用し、通風性の良いコイルエンド群構造を有する固定子巻線を実現することができ、回転電機の一層の小型化・性能向上に資する固定子を提供することができる。
なお、導体セグメント自体を複数枚の分割平角導線で構成しているため、うず電流損失を低減することができるという副次的効果も奏する。 Therefore, it is possible to realize a stator winding having a coil end group structure with good ventilation by utilizing conductor segments that are advantageous in terms of manufacturing, and a stator that contributes to further miniaturization and performance improvement of rotating electrical machines. Can be provided.
In addition, since the conductor segment itself is composed of a plurality of divided rectangular conductors, there is also a secondary effect that eddy current loss can be reduced.

本発明の固定子を適用した回転電機の一実施形態の全体構成を説明するためのもので、車両用交流発電機の上半部を断面にして示す正面図である（実施例１）。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view illustrating an overall configuration of an embodiment of a rotating electrical machine to which a stator of the present invention is applied, showing a cross section of an upper half of a vehicle AC generator (Example 1). 本発明の固定子において、固定子鉄心に巻装される固定子巻線（導体セグメント）のスロット内における一配置状態を示す部分断面図である（実施例１）。In the stator of this invention, it is a fragmentary sectional view which shows the arrangement | positioning state in the slot of the stator winding | coil (conductor segment) wound by the stator core (Example 1). 本発明の固定子において、固定子巻線の一配列状態の主要部を一部断面にして示す斜視図である（実施例１）。In the stator of this invention, it is a perspective view which shows the principal part of the arrangement state of a stator winding in a partial cross section (Example 1). 本発明の固定子において、上記固定子巻線を構成する導体セグメントの斜視図である（実施例１）。In the stator of this invention, it is a perspective view of the conductor segment which comprises the said stator winding | coil (Example 1). 対となる導体セグメントの接合形態の説明に供するもので、連続接続した複数本の導体セグメントの全体構成を示す斜視図およびその接合部を固定子鉄心の軸方向から見た拡大正面図である（実施例１）。FIG. 2 is a perspective view showing the entire configuration of a plurality of conductor segments that are continuously connected, and an enlarged front view of the joint viewed from the axial direction of the stator core. Example 1). 対となる導体セグメントの別の接合形態として、２つの異なる接合形態を示すもので、（ａ）および（ｂ）はそれぞれ接合部を固定子鉄心の軸方向から見た正面図である（実施例２）。Two different joining forms are shown as another joining form of the conductor segments to be paired, and (a) and (b) are front views of the joining part as seen from the axial direction of the stator core (Example) 2). 本発明の固定子における他の実施形態として、特に、導体セグメントの主要部をなす曲がり部の詳細説明に供するものであり、導体セグメントの主要部の斜視図およびその曲がり部を固定子鉄心の径方向から見た拡大正面図である（実施例３）。As another embodiment of the stator of the present invention, in particular, it will be used for detailed description of a bent portion forming the main part of the conductor segment, and a perspective view of the main part of the conductor segment and the bent part of the stator core (Example 3) which is the enlarged front view seen from the direction.

本発明を実施するための最良の形態を以下の実施例により詳細に説明する。 The best mode for carrying out the present invention will be described in detail with reference to the following examples.

本実施例は、本発明を適用する回転電機を代表して、車両用交流発電機（オルタネータ）を例示しており、以下の説明では、まず、車両用交流発電機の基本構成を概説したのち、本発明の各実施例における特徴点およびその基本的機能について順次説明し、最後に本発明の特徴点とその特徴点毎の作用効果を要約列挙する。 This embodiment exemplifies a vehicular AC generator (alternator) on behalf of a rotating electrical machine to which the present invention is applied. In the following description, first, the basic configuration of a vehicular AC generator is outlined. The feature points and their basic functions in each embodiment of the present invention will be described in order, and finally, the feature points of the present invention and the actions and effects for each feature point will be summarized and listed.

なお、各実施例において、同一または均等部分には、同一符号を付し、重複説明を省略することとする。また、図中に付した方向の表示（「軸方向」、「径方向」、「周方向」）は、固定子、とりわけ固定子鉄心を基準にした方向を示すもので、固定子鉄心の軸方向、径方向、周方向を指しており、文中ではそれぞれ単に「軸方向」、「径方向」、「周方向」と簡略化して使用することもある。 In each embodiment, the same or equivalent parts are denoted by the same reference numerals, and redundant description is omitted. In addition, the direction indications (“axial direction”, “radial direction”, “circumferential direction”) in the figure indicate the direction relative to the stator, particularly the stator core. It refers to the direction, radial direction, and circumferential direction, and in the text, they may be used simply as “axial direction”, “radial direction”, and “circumferential direction”, respectively.

［実施例１］
〔車両用交流発電機の基本構成〕
図１に示す車両用交流発電機１は本発明の固定子２の一実施形態を備えているものであり、当該交流発電機１の基本構成を図１に基づいて説明する。 [Example 1]
[Basic configuration of AC generator for vehicles]
A vehicle alternator 1 shown in FIG. 1 includes an embodiment of a stator 2 of the present invention, and a basic configuration of the alternator 1 will be described with reference to FIG.

車両用交流発電機１は、電機子として働く固定子２と、界磁として働く回転子３と、固定子２を挟持固定するとともに回転子３を回転可能に支持するハウジング４（フロントハウジング４ａおよびリアハウジング４ｂ）と、固定子２から出力される交流電圧を直流電圧に変換する整流装置５とを含んで構成されている。固定子２は、円環状の固定子鉄心２０に多相の固定子巻線３０が巻装されて構成されるものであるが、その具体的構成の詳細については後述する。 The vehicle alternator 1 includes a stator 2 that serves as an armature, a rotor 3 that serves as a field, and a housing 4 that sandwiches and fixes the stator 2 and supports the rotor 3 rotatably (front housing 4a and The rear housing 4b) and a rectifier 5 that converts an AC voltage output from the stator 2 into a DC voltage are included. The stator 2 is configured by winding a multi-phase stator winding 30 around an annular stator core 20, and details of the specific configuration will be described later.

回転子３は、シャフト６と一体になって回転するものであり、ランデル型ポールコア７、界磁巻線８、スリップリング９、１０、冷却ファンとしての斜流ファン１１および遠心ファン１２を備えている。シャフト６は、プーリ１３に連結されており、車両に搭載された走行用のエンジン（図示せず）により回転駆動される。 The rotor 3 rotates integrally with the shaft 6, and includes a Landel pole core 7, a field winding 8, slip rings 9 and 10, a mixed flow fan 11 as a cooling fan, and a centrifugal fan 12. Yes. The shaft 6 is connected to a pulley 13 and is rotationally driven by a traveling engine (not shown) mounted on the vehicle.

ランデル型ポールコア７は、一組のポールコアを互いに噛み合うように組み合わせて構成されている。そして、このポールコア７は、シャフト６に組み付けられたボス部７１と、ボス部７１の両端から径方向に延びるディスク部７２と、極数に応じて設けられた爪状磁極部７３を備えている。 The Landel-type pole core 7 is configured by combining a pair of pole cores so as to mesh with each other. The pole core 7 includes a boss portion 71 assembled to the shaft 6, a disk portion 72 extending in the radial direction from both ends of the boss portion 71, and a claw-shaped magnetic pole portion 73 provided according to the number of poles. .

プーリ側の斜流ファン１１は、一方のポールコア７端面に溶接などによって固着されたベース板に対して、鋭角な傾斜を持つブレードおよび直角のブレードからなる複合ブレードを備えており、また、反プーリ側の遠心ファン１２は、他方のポールコア７端面に溶接などによって固着されたベース板に対して、直角のブレードのみからなるブレードを備えている。各ファン１１、１２は、回転子３と一体になって回転し、固定子２の固定子巻線３０に冷却風を供給する送風装置を構成している。 The mixed-flow fan 11 on the pulley side includes a composite blade made up of a blade having an acute angle and a right-angled blade with respect to a base plate fixed to one end face of the pole core 7 by welding or the like. The centrifugal fan 12 on the side is provided with a blade composed only of a right angle blade with respect to a base plate fixed to the end face of the other pole core 7 by welding or the like. The fans 11 and 12 constitute a blower that rotates integrally with the rotor 3 and supplies cooling air to the stator winding 30 of the stator 2.

この送風装置に呼応して、ハウジング４には、フロントハウジング４ａおよびリアハウジング４ｂの軸方向端面にそれぞれ冷却風の吸入孔４１が設けられており、ハウジング４の外周両肩部には、固定子巻線３０の第１コイルエンド群３０ａと第２コイルエンド群３０ｂのそれぞれの径方向外側に対応させて冷却風の排出孔４２が設けられている。 In response to this blower, the housing 4 is provided with cooling air suction holes 41 on the axial end surfaces of the front housing 4a and the rear housing 4b, respectively. Cooling air discharge holes 42 are provided so as to correspond to the radially outer sides of the first coil end group 30 a and the second coil end group 30 b of the winding 30.

なお、整流装置５は、車両用交流発電機１の反プーリ側の端部に設けられており、ハウジング４内に導入される冷却風の一部が通過するようになっている。 The rectifier 5 is provided at the end on the side opposite to the pulley of the vehicle alternator 1 so that a part of the cooling air introduced into the housing 4 passes therethrough.

〔固定子２の具体的構造〕
次に、固定子２の具体的構造について、図２〜図５をも参照しながら説明する。 [Specific structure of stator 2]
Next, a specific structure of the stator 2 will be described with reference to FIGS.

まず、図１〜図３に基づいて固定子２の基本構成を概説する。
本実施例の固定子２は、回転子３の磁極数に対応して、固定子鉄心２０に三相の固定子巻線３０が巻装されている。 First, the basic configuration of the stator 2 will be outlined based on FIGS.
In the stator 2 of this embodiment, a three-phase stator winding 30 is wound around the stator core 20 in accordance with the number of magnetic poles of the rotor 3.

固定子鉄心２０は、複数枚のコアシート（鋼板）を積層して構成された積層コアからなり、全体として円環状（円筒状）を呈している。固定子鉄心２０の内周面には、固定子鉄心２０の両端部を軸方向に貫通する複数のスロット２１が周方向に等ピッチに、かつ、径方向に放射状に設けられている。複数のスロット２１には、絶縁シート２２を介装して固定子巻線３０が巻装されている。そして、固定子巻線３０は、固定子鉄心２０の一方の端部側から軸方向に露出（突出）する部分が第１コイルエンド群３０ａを形成するとともに、固定子鉄心２０の他方の端部側から軸方向に露出（突出）する部分が第２コイルエンド群３０ｂを形成している。 The stator core 20 is composed of a laminated core formed by laminating a plurality of core sheets (steel plates), and has an annular shape (cylindrical shape) as a whole. On the inner peripheral surface of the stator core 20, a plurality of slots 21 that penetrate both ends of the stator core 20 in the axial direction are provided at equal pitches in the circumferential direction and radially in the radial direction. A stator winding 30 is wound around the plurality of slots 21 with an insulating sheet 22 interposed therebetween. The stator winding 30 has a first coil end group 30 a that is exposed (protruded) in the axial direction from one end side of the stator core 20, and the other end of the stator core 20. A portion exposed (protruded) in the axial direction from the side forms a second coil end group 30b.

固定子巻線３０は、所定形状の導体セグメントＳが連続的に接合されることで巻線体を構築する所謂導体セグメント接合型巻線として構成されており、固定子鉄心２０の各スロット２１に対して偶数本の導体セグメントＳが電気導体として収容されている。本実施例の固定子巻線３０は、三相で、４本の導体セグメントＳ１〜Ｓ４が、固定子鉄心２０の径方向に関して内周側から内端層、内中層、外中層、外端層の順で一列に配列されている。そして、それぞれの導体セグメントＳ１〜Ｓ４には、図４に示すごとき詳細構造を有する所謂Ｕ字状導体セグメントＳが用いられている。
もっとも、Ｉ字状の導体セグメントを組合せて用いることも可能であり、かかるケースについては後述する変形例で補説する。 The stator winding 30 is configured as a so-called conductor segment bonding type winding in which a conductor body S having a predetermined shape is continuously joined to construct a winding body, and is formed in each slot 21 of the stator core 20. On the other hand, an even number of conductor segments S are accommodated as electrical conductors. The stator winding 30 of this embodiment has three phases, and four conductor segments S1 to S4 are arranged from the inner peripheral side to the inner end layer, the inner middle layer, the outer middle layer, and the outer end layer with respect to the radial direction of the stator core 20. They are arranged in a line in the order of. And what is called a U-shaped conductor segment S which has a detailed structure as shown in FIG. 4 is used for each conductor segment S1-S4.
However, it is also possible to use a combination of I-shaped conductor segments, and such a case will be supplemented by a modification described later.

しかして、上記のＵ字状導体セグメントＳについて、以下図４をも参照しながら説明する。なお、本実施例ではすべての導体セグメントＳに同一構造のものを採用しているため、図３および図４中において、対となる導体セグメントに関しては、破線で示すとともに、同一構成要素には同一記号に「’（アポストロフィ）」を付して区別することとし、構成要素の個別説明を省略する。 The U-shaped conductor segment S will be described below with reference to FIG. In this embodiment, since all conductor segments S have the same structure, in FIG. 3 and FIG. 4, the paired conductor segments are indicated by broken lines and the same components are the same. The symbols are distinguished by attaching “′ (apostrophe)”, and the individual description of the components is omitted.

本実施例の所謂Ｕ字状導体セグメントと呼称される導体セグメントＳは、一端側がＵ字状に折曲して形成され、他端側が後工程で対となる導体セグメントＳ’と接合される開放端をなす基本構成を有している。
この基本構成を導体セグメントＳの製作過程（固定子鉄心２０への組付過程）にしたがって説明すれば、まず素線としては、定寸切断した断面矩形状の平角導線を用いている。そして、定寸切断した平角導線をＵ字状に折り曲げて、２本の直線部３１、３２と１個のＵ字部（ターン部）３３を形成した後に、この２本の直線部３１、３２を所定位置で所定方向に捩じるように広げて所定の間隔（スパン）を有するように変形する。そして、それぞれの直線部３１、３２を、固定子鉄心２０の一端からスロット２１内に挿通して導体挿通部３１１、３２１を形成するとともに、固定子鉄心２０の他端から突出した導体突出部を、周方向に折曲することにより、曲がり部３１２、３２２と、周方向に傾斜して延びる斜状導体部３１３、３２３とを形成する。
なお、斜状導体部３１３、３２３の先端には、対となる導体セグメントＳ’との接合に供する直行状の接合部３１４、３２４を残しており、この接合部３１４、３２４と斜状導体部３１３、３２３との間にも、上記曲がり部３１２、３２２と同様な接合用曲がり部３１５、３２５を形成している。 A conductor segment S called a so-called U-shaped conductor segment in the present embodiment is formed by bending one end side into a U-shape and joining the other end side with a conductor segment S ′ that forms a pair in a later step. It has a basic configuration that forms an end.
Explaining this basic configuration in accordance with the manufacturing process of the conductor segment S (the process of assembling to the stator core 20), as the element wire, first, a rectangular conductor having a rectangular cross section cut to a certain size is used. Then, the rectangular conductor wire that has been cut to a predetermined size is bent into a U shape to form two straight portions 31 and 32 and one U-shaped portion (turn portion) 33, and then the two straight portions 31 and 32. Is expanded so as to be twisted in a predetermined direction at a predetermined position and deformed to have a predetermined interval (span). Then, the straight portions 31 and 32 are inserted into the slot 21 from one end of the stator core 20 to form conductor insertion portions 311 and 321, and the conductor protrusions protruding from the other end of the stator core 20 are formed. By bending in the circumferential direction, bent portions 312 and 322 and oblique conductor portions 313 and 323 extending in the circumferential direction are formed.
In addition, at the tips of the oblique conductor portions 313 and 323, the straight joint portions 314 and 324 used for joining with the pair of conductor segments S ′ are left, and the joint portions 314 and 324 and the oblique conductor portions are left. Bending portions 315 and 325 for joining similar to the bent portions 312 and 322 are also formed between 313 and 323.

かくして、導体セグメントＳは、開放端側に位置し固定子鉄心２０の一端側から軸方向に突出する各部分、つまり曲がり部３１２、３２２、斜状導体部３１３、３２３、接合部３１４、３２４および接合用曲がり部３１５、３２５からなる部分で、第１コイルエンド群３０ａを形成している。
また、導体セグメントＳは、反開放端側に位置するＵ字部３３が固定子鉄心２０の他端側から軸方向に突出し、上記曲がり部３１２、３２２および斜状導体部３１３、３２３と実質的に同様な曲がり部３３２および斜状導体部３３３を有している。そして、このＵ字部３３によって第２コイルエンド群３０ｂが形成される。
さらに、導体セグメントＳは、導体挿通部３１１、３２１が、固定子鉄心２０のスロット２１に対し、図２に示すＳ１〜Ｓ４のごとく径方向に一列に配置されるものである。 Thus, the conductor segment S is located on the open end side and protrudes in the axial direction from one end side of the stator core 20, that is, the bent portions 312 and 322, the oblique conductor portions 313 and 323, the joint portions 314 and 324, and The first coil end group 30a is formed by the portions formed by the bending portions 315 and 325 for joining.
The conductor segment S has a U-shaped portion 33 located on the side opposite to the open end protruding in the axial direction from the other end side of the stator core 20, and is substantially the same as the bent portions 312 and 322 and the oblique conductor portions 313 and 323. The same bent portion 332 and oblique conductor portion 333 are provided. The U-shaped portion 33 forms the second coil end group 30b.
Further, in the conductor segment S, the conductor insertion portions 311 and 321 are arranged in a line in the radial direction as shown in S1 to S4 in FIG. 2 with respect to the slot 21 of the stator core 20.

〔本発明の特徴事項〕
本発明の固定子２の特徴は、固定子巻線３０において、素線をなす導体セグメントＳ自体の構造と、その配線構造、とりわけコイルエンド群３０ａ、３０ｂを形成する斜状導体部３１３、３２３、３３３の具体的構造にあり、図２、図４および図５に基づいてさらに詳しく説明する。 [Features of the present invention]
The feature of the stator 2 of the present invention is that in the stator winding 30, the structure of the conductor segment S itself forming a strand and the wiring structure thereof, in particular, the oblique conductor portions 313, 323 that form the coil end groups 30 a, 30 b. 333, and will be described in more detail with reference to FIGS.

導体セグメントＳは、全長にわたって同一の矩形状の断面（幅Ｗより厚みＴが小さいＷ＞Ｔの寸法関係）を有する２枚の分割平角導線Ｓａ、Ｓｂで構成されている。
そして、導体セグメントＳの各分割平角導線Ｓａ、Ｓｂは、固定子鉄心２０のスロット２１に対し、２枚の分割平角導線Ｓａ、Ｓｂが厚みＴ方向で固定子鉄心２０の周方向に密に重ねて挿通されるとともに幅Ｗ方向が固定子鉄心２０の径方向に沿って配置される導体挿通部３１１、３２１を有している。
また、各分割平角導線Ｓａ、Ｓｂは、一端が導体挿通部３１１、３２１の一端側に連なり、スロット２１から軸方向に突出したところで、厚みＴ方向に折曲される曲がり部３１２、３２２と、曲がり部３１２、３２２の他端に連なり、固定子鉄心２０に対して周方向に斜行状態を呈する斜状導体部３１３、３２３とを有している。
また、各分割平角導線Ｓａ、Ｓｂは、導体挿通部３１１、３２１の他端側同士を繋ぐＵ字部３３においても、上記曲がり部３１２、３２２および斜状導体部３１３、３２３と同様な曲がり部３３２および斜状導体部３３３を有している。 The conductor segment S is composed of two divided rectangular conductors Sa and Sb having the same rectangular cross section over the entire length (a dimensional relationship of W> T having a thickness T smaller than the width W).
Then, each of the divided rectangular conductors Sa and Sb of the conductor segment S is densely stacked in the circumferential direction of the stator core 20 in the thickness T direction with respect to the slot 21 of the stator core 20. And the conductor insertion portions 311 and 321 arranged in the width W direction along the radial direction of the stator core 20.
Further, each of the divided rectangular conductive wires Sa and Sb is connected to one end side of the conductor insertion portions 311 and 321 and is bent in the thickness T direction when protruding from the slot 21 in the axial direction. The bent conductors 312 and 322 are connected to the other ends of the bent parts 312 and 322, and have oblique conductor parts 313 and 323 that are inclined with respect to the stator core 20 in the circumferential direction.
Further, each of the divided rectangular conductive wires Sa and Sb is also bent at the U-shaped portion 33 that connects the other end sides of the conductor insertion portions 311 and 321 to the bent portions similar to the bent portions 312 and 322 and the oblique conductor portions 313 and 323. 332 and a diagonal conductor portion 333.

そして、各分割平角導線Ｓａ、Ｓｂは、すべての曲がり部３１２、３２２、３３２が固定子鉄心２０の軸方向に同心的に重畳されるものである。そして、外径側に位置する曲がり部３１２、３２２、３３２と、内径側に位置する曲がり部３１２、３２２、３３２とは、実質的に同一の大きさの曲率半径（後述の図７に示すＲ１、Ｒ２）を有しているものの、外径側に位置する曲がり部３１２、３２２、３３２は、軸方向に直線状に突出する直行部分３１２ａ、３２２ａ、３３２ａを有していて、内径側に位置する曲がり部３１２、３２２、３３２との間に段差を形成している。したがって、この両者の曲がり部３１２、３２２、３３２によって、２枚の分割平角導線Ｓａ、Ｓｂは、斜状導体部３１３、３２３、３３３のところが、相互に厚みＴ方向（軸方向）に所定間隔で離隔し、斜状導体部３１３、３２３、３３３の全長にわたって一様に通風用の隙間Ｐを形成している。この隙間Ｐは、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂに対して、固定子鉄心２０の径方向に開口する通風路を形成するものである。 In each of the divided rectangular conductive wires Sa and Sb, all the bent portions 312, 322, and 332 are concentrically superimposed in the axial direction of the stator core 20. The bent portions 312, 322, and 332 located on the outer diameter side and the bent portions 312, 322, and 332 located on the inner diameter side are substantially the same in radius of curvature (R1 shown in FIG. 7 described later). , R2), but the bent portions 312, 322, and 332 positioned on the outer diameter side have straight portions 312a, 322a, and 332a that protrude linearly in the axial direction, and are positioned on the inner diameter side. Steps are formed between the bent portions 312, 322, and 332. Accordingly, the two divided rectangular conductors Sa and Sb are bent at the predetermined intervals in the thickness T direction (axial direction) by the bent portions 312, 322 and 332. The gaps P are spaced apart and uniformly formed over the entire length of the oblique conductor portions 313, 323, and 333. The gap P forms an air passage that opens in the radial direction of the stator core 20 with respect to the first and second coil end groups 30 a and 30 b of the stator winding 30.

なお、各分割平角導線Ｓａ、Ｓｂにおいて、斜状導体部３１３、３２３と接合部３１４、３２４との間に形成される接合用曲がり部３１５、３２５においても、上記曲がり部３１２、３２２、３３２と同様の関係構造になっており、外径側に位置する接合用曲がり部３１５、３２５は、軸方向に直線状に突出する直行部分３１５ａ、３２５ａを有しており、上記の一様な通風用隙間Ｐの形成に貢献している。 In each of the divided rectangular conductive wires Sa and Sb, the bent portions 312, 322, and 332 are also connected to the bent portions 315 and 325 that are formed between the oblique conductor portions 313 and 323 and the bonded portions 314 and 324. The bending portions 315 and 325 for joining, which have the same relational structure and are located on the outer diameter side, have straight portions 315a and 325a that project linearly in the axial direction, and are used for the uniform ventilation described above. This contributes to the formation of the gap P.

そして、対となる導体セグメントＳ、Ｓ’は、図５に示すように、連続的に接合される。対となる導体セグメントＳ、Ｓ’は、一方の導体セグメントＳの斜状導体部３１３、３２３と他方の導体セグメントＳ’の斜状導体部３１３’、３２３’とを接合するための直行状の接合部３１４、３２４、３１４’、３２４’を有している。この接合部３１４、３２４、３１４’、３２４’は、導体セグメントＳ、Ｓ’を構成する２枚の分割平角導線Ｓａ、Ｓｂ同士を接合する接合部を兼用しており、すべての接合部、つまり対となる接合部同士（接合部３１４と接合部３２４’、および接合部３２４と接合部３１４’）がそれぞれ田の字型に集合配置され、溶接玉Ｑにて一体に溶接されている。このように、溶接玉Ｑは、全体として小さく一点に集中している。 The pair of conductor segments S and S 'are continuously joined as shown in FIG. The pair of conductor segments S and S ′ are orthogonal to join the oblique conductor portions 313 and 323 of one conductor segment S and the oblique conductor portions 313 ′ and 323 ′ of the other conductor segment S ′. It has junction part 314,324,314 ', 324'. The joints 314, 324, 314 ′, and 324 ′ also serve as joints that join the two split rectangular conductors Sa and Sb that constitute the conductor segments S and S ′. Pairs of joints (joint part 314 and joint part 324 ′, and joint part 324 and joint part 314 ′) are collectively arranged in a square shape, and are welded integrally with welding balls Q. Thus, the weld balls Q are small and concentrated on one point as a whole.

次に、上記構成の固定子２を備えた車両用交流発電機１が奏する作用効果を項目別に説明する。 Next, the effect which the vehicle AC generator 1 provided with the stator 2 of the said structure show | plays is demonstrated according to an item.

〔基本的機能〕
車両用交流発電機１は、ベルト等を介してプーリ１３にエンジン（図示せず）からの回転力が伝えられると回転子３が所定方向に回転する。この状態で回転子３の界磁巻線８に励磁電流を流すことにより、ランデル型ポールコア７のそれぞれの爪状磁極部７３が励磁され、固定子巻線３０に三相交流電圧を発生させることができ、整流装置５の出力端子からは所定の直流電流が取り出される。
車両用交流発電機１は、固定子巻線３０の発熱により発電効率が低下することが知られており、固定子巻線３０を強制送風により冷却するための送風装置として、回転子３には斜流ファン１１および遠心ファン１２が装着されている。
したがって、発電中は、回転子３と共にファン１１、１２が回転することにより、ハウジング４内に吸入孔４１から流入し、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂを通過して、排出孔４２からハウジング４外に流出するという、冷却風が発生し、固定子巻線３０が強制的に冷却される。 [Basic functions]
In the vehicular AC generator 1, when a rotational force from an engine (not shown) is transmitted to the pulley 13 via a belt or the like, the rotor 3 rotates in a predetermined direction. In this state, by applying an exciting current to the field winding 8 of the rotor 3, each claw-shaped magnetic pole portion 73 of the Landel pole core 7 is excited to generate a three-phase AC voltage in the stator winding 30. A predetermined direct current is taken out from the output terminal of the rectifier 5.
The vehicular AC generator 1 is known to have reduced power generation efficiency due to heat generated by the stator winding 30, and the rotor 3 is used as a blower for cooling the stator winding 30 by forced air blowing. A mixed flow fan 11 and a centrifugal fan 12 are mounted.
Therefore, during power generation, the fans 11 and 12 rotate together with the rotor 3 to flow into the housing 4 from the suction hole 41 and pass through the first and second coil end groups 30a and 30b of the stator winding 30. As a result, cooling air that flows out of the housing 4 from the discharge hole 42 is generated, and the stator winding 30 is forcibly cooled.

ここで、冷却風は、上述のごとく、固定子巻線３０の第１、第２コイルエンド３０ａ、３０ｂを径方向に通過するために、ここでの通風抵抗を如何に低減するかが固定子巻線３０を冷やす決め手となる。
本実施例においては、導体セグメントＳ自体の構造および固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂを形成する斜状導体部３１３、３２３、３３３自体の構造を工夫しており、小型・高性能化、製造面等の諸点で次のような特質を発揮する。 Here, as described above, since the cooling air passes through the first and second coil ends 30a and 30b of the stator winding 30 in the radial direction, how to reduce the ventilation resistance here is described in the stator. It becomes the decisive factor for cooling the winding 30.
In the present embodiment, the structure of the conductor segment S itself and the structure of the oblique conductor portions 313, 323, 333 themselves forming the first and second coil end groups 30a, 30b of the stator winding 30 are devised. It exhibits the following characteristics in terms of compactness, high performance, and manufacturing.

〔回転電機としての小型・高性能化について〕
（１）導体セグメントＳにおいて、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂを形成する斜状導体部３１３、３２３、３３３には、２枚の分割平角導線Ｓａ、Ｓｂを相互に離隔させて通風用の隙間Ｐを設け、この隙間Ｐによって、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂに対して、固定子鉄心２０の径方向に開口する通風路を形成している。このため、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂ自体を冷却風が良好に通過する風通しの良い構造とすることができ、固定子巻線３０の冷却効率を向上することができる。
（２）また、斜状導体部３１３、３２３、３３３は、２枚の分割平角導線Ｓａ、Ｓｂが厚みＴ方向で固定子鉄心２０の軸方向に重畳して形成されているため、２枚の分割平角導線Ｓａ、Ｓｂを軸方向に離隔させても、薄肉部分を有効活用して、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂ自体の突出高さ（軸方向長）をさほど大きくすることなく、隙間Ｐを設けることができ、この点でも小型化に貢献できる。
（３）また、１本の導体セグメントＳ自体を２枚の分割平角導線Ｓａ、Ｓｂで構成し、導体を分割構造にしているため、同一通電面積におけるうず電流損失を低減することができるという副次的効果も奏する。
（４）したがって、車両用交流発電機１の小型・高性能化を図ることができる。 [About small size and high performance as a rotating electrical machine]
(1) In the conductor segment S, the slanted conductor portions 313, 323, and 333 that form the first and second coil end groups 30a and 30b of the stator winding 30 are each provided with two divided rectangular conductors Sa and Sb. A gap P for ventilation is provided so as to be separated from each other, and the gap P allows ventilation to open in the radial direction of the stator core 20 with respect to the first and second coil end groups 30a and 30b of the stator winding 30. Forming a road. For this reason, the first and second coil end groups 30a and 30b of the stator winding 30 can be made to have a well-ventilated structure that allows the cooling air to pass well, and the cooling efficiency of the stator winding 30 is improved. be able to.
(2) Further, since the oblique conductor portions 313, 323, 333 are formed by overlapping the two divided rectangular conductors Sa, Sb in the thickness T direction in the axial direction of the stator core 20, Even if the split rectangular conductors Sa and Sb are separated in the axial direction, the thinned portion is effectively used to protrude the first and second coil end groups 30a and 30b of the stator winding 30 (length in the axial direction). The gap P can be provided without significantly increasing the size, which also contributes to downsizing.
(3) Further, since one conductor segment S itself is composed of two divided rectangular conductors Sa and Sb and the conductor is divided, the eddy current loss in the same energization area can be reduced. The following effects are also achieved.
(4) Therefore, the vehicle alternator 1 can be reduced in size and performance.

〔製造面等について〕
（１）特に、導体セグメント接合型の固定子巻線３０において、第１、第２コイルエンド群３０ａ、３０ｂに通風用の隙間Ｐ（通風路）を形成するにもかかわらず、導体セグメントＳ自体を１種類にすることができ、分割平角導線Ｓａ、Ｓｂにも全長にわたって同一断面形状の平角線を用いることができる。したがって、汎用の平角導線を用いた安価で製造の容易な導体セグメントＳとすることができる。
（２）しかも、導体セグメントＳを構成する２枚の分割平角導線Ｓａ、Ｓｂを相互に離隔させる離隔量を調整するだけで、所望の通風用の隙間Ｐ（通風路）を形成できるため、設計自由度が増し、種々な要求性能にも容易に対応することができる。
（３）また、導体セグメントＳは、固定子鉄心２０のスロット２１に対し、２枚の分割平角導線Ｓａ、Ｓｂを厚みＴ方向で固定子鉄心２０の周方向に重ねて挿通するとともに幅Ｗ方向を固定子鉄心２０の径方向に沿って配置することで導体挿通部３１１、３２１を形成し、かつ、幅Ｗより薄い厚みＴ方向に折曲して斜状導体部３１３、３２３、３３３を形成しているため、２枚の分割平角導線Ｓａ、Ｓｂを幅Ｗ方向が固定子鉄心２０の周方向になるように配置し幅Ｗ方向に折曲する場合に比して、曲がり部３１２、３２２、３３２を小さな曲げ荷重で種々な曲率に曲げることが可能で、冷却効率に資する種々な形態の通風用の隙間Ｐ（通風路）を容易に形成することができる。
（４）対となる導体セグメントＳ、Ｓ’の接合部３１４、３２４、３１４’、３２４’が、導体セグメントＳ、Ｓ’自体を構成する２枚の分割平角導線Ｓａ、Ｓｂ同士の接合部を兼用しており、すべての接合部３１４、３２４、３１４’、３２４’を一体に溶接しているため、接合作業を効率よく実施することができる。しかも、すべて（４つずつ）の接合部（例えば２つの接合部３１４と２つの接合部３２４’）を田の字型に集合配置しているため、溶接玉Ｑを小さくすることができ、隣接して配置される導体セグメントとの間に充分な電気的絶縁距離を確保できる。 [About manufacturing etc.]
(1) In particular, in the conductor segment bonded type stator winding 30, the conductor segment S itself is formed despite the formation of a ventilation gap P (ventilation path) in the first and second coil end groups 30a, 30b. The rectangular wires having the same cross-sectional shape over the entire length can be used for the divided rectangular conductive wires Sa and Sb. Therefore, it is possible to obtain a conductor segment S that is inexpensive and easy to manufacture using a general-purpose rectangular conductor.
(2) In addition, the design can be made because the desired ventilation gap P (ventilation path) can be formed simply by adjusting the distance by which the two divided rectangular conductors Sa and Sb constituting the conductor segment S are separated from each other. The degree of freedom increases, and various required performances can be easily accommodated.
(3) In addition, the conductor segment S is inserted into the slot 21 of the stator core 20 by overlapping the two split rectangular conductors Sa and Sb in the thickness T direction in the circumferential direction of the stator core 20 and in the width W direction. Are arranged along the radial direction of the stator core 20 to form conductor insertion portions 311 and 321 and bend in the thickness T direction thinner than the width W to form oblique conductor portions 313, 323 and 333. Therefore, compared to the case where the two split rectangular conductors Sa and Sb are arranged so that the width W direction is the circumferential direction of the stator core 20 and bent in the width W direction, the bent portions 312 and 322 are bent. 332 can be bent to various curvatures with a small bending load, and various forms of ventilation gaps P (ventilation paths) contributing to cooling efficiency can be easily formed.
(4) The joint portions 314, 324, 314 ′, and 324 ′ of the conductor segments S and S ′ that form a pair are joint portions of the two divided rectangular conductors Sa and Sb that constitute the conductor segments S and S ′ themselves. Since all the joints 314, 324, 314 ′, 324 ′ are integrally welded, the joining work can be performed efficiently. Moreover, since all (four by four) joints (for example, two joints 314 and two joints 324 ′) are collectively arranged in a square shape, the weld balls Q can be made small and adjacent to each other. Thus, a sufficient electrical insulation distance can be secured between the conductor segment and the conductor segment.

［実施例２］
次に、本発明の実施例２について説明する。本実施例では、上述の実施例１との相違点を中心にして主に図６を参照しながら説明する。
本実施例は、対となる導体セグメントＳ、Ｓ’の接合部３１４、３２４、３１４’、３２４’が、導体セグメントＳ、Ｓ’自体を構成する２枚の分割平角導線Ｓａ、Ｓｂ同士を接合する接合部と兼用になっている点では実施例１と同様であるが、すべての接合部３１４、３２４、３１４’、３２４’を接合する別の接合形態として、第１と第２の２つの異なる接合形態例を示すものである。 [Example 2]
Next, a second embodiment of the present invention will be described. In the present embodiment, description will be made mainly with reference to FIG. 6 with a focus on differences from the first embodiment.
In the present embodiment, the joining portions 314, 324, 314 ′, 324 ′ of the conductor segments S, S ′ to be paired join the two divided rectangular conductors Sa, Sb constituting the conductor segments S, S ′ themselves. The same as the first embodiment in that it is also used as a joint portion to be used, but as another joint form for joining all the joint portions 314, 324, 314 ′, 324 ′, the first and second two The example of a different joining form is shown.

第１の接合形態である図６（ａ）に示す例では、対となる導体セグメントＳ、Ｓ’は、すべて（４つずつ）の接合部３１４、３２４、３１４’、３２４’が、固定子鉄心２０の径方向に対してＩの字型に一列配置され、溶接玉Ｑで一体に溶接されている。
なお、図４等の他の図面をも参照しながら、対となる導体セグメントＳ、Ｓ’のうち、一方の導体セグメントＳを代表して付随構成を補足すると、導体セグメントＳを構成する２枚の分割平角導線Ｓａ、Ｓｂは、接合部側（反Ｕ字部側）の斜状導体部３１３、３２３が、曲がり部３１２、３２２および接合用曲がり部３１５、３２５の段差によって軸方向にズレることで、分割平角導線Ｓａ、Ｓｂ間に通風用の隙間Ｐが形成されるとともに、一方の分割平角導線Ｓａが幅Ｗ分だけ径方向に傾倒されることで、２枚の分割平角導線Ｓａ、Ｓｂの接合部３１４、３２４同士が径方向に並置されている。 In the example shown in FIG. 6A which is the first joining form, the conductor segments S and S ′ to be paired are all (four by one), and the joint portions 314, 324, 314 ′ and 324 ′ are the stators. One row is arranged in an I-shape with respect to the radial direction of the iron core 20 and is welded integrally with a welding ball Q.
In addition, referring to other drawings such as FIG. 4 and the like, if one of the paired conductor segments S and S ′ is supplemented with an accompanying configuration on behalf of one conductor segment S, two sheets constituting the conductor segment S will be described. In the split rectangular conductive wires Sa and Sb, the inclined conductor portions 313 and 323 on the joint side (the anti-U-shaped side) are displaced in the axial direction due to the steps of the bent portions 312 and 322 and the bent portions 315 and 325 for joining. Thus, a gap P for ventilation is formed between the divided rectangular conductors Sa and Sb, and one of the divided rectangular conductors Sa is tilted in the radial direction by the width W, whereby two divided rectangular conductors Sa and Sb are provided. The joint portions 314 and 324 are juxtaposed in the radial direction.

上記構成によれば、実施例１と同様な作用効果が得られることは勿論、次のごとき本実施形態特有の作用効果を奏する。
導体セグメントＳ、Ｓ’の接合部３１４、３２４、３１４’、３２４’は、電気抵抗が大きく必然的に発熱も大きくなるが、本実施例では、接合部３１４、３２４、３１４’、３２４’全体が径方向に薄く延びる扁平状態になるため、表面積を大きくし放熱を促進することができる。 According to the above configuration, the same operational effects as those of the first embodiment can be obtained, and the following specific operational effects can be obtained.
The joint portions 314, 324, 314 ′, and 324 ′ of the conductor segments S and S ′ have large electric resistance and inevitably increase heat generation, but in this embodiment, the entire joint portions 314, 324, 314 ′, and 324 ′ are formed. Since it becomes the flat state extended thinly in radial direction, a surface area can be enlarged and heat dissipation can be accelerated | stimulated.

［第１接合状態の変形例］
なお、上述した第１の接合形態によれば、２枚の分割平角導線Ｓａ、Ｓｂを接合部３１４、３２４のところで幅Ｗ方向に並置することになるため、変形例として、斜状導体部３１３、３２３に、軸方向の通風路（通風用の隙間Ｐ）を設けることができる。つまり、斜状導体部３１３、３２３において、接合部３１４、３２４の手前のところで、２枚の分割平角導線Ｓａ、Ｓｂを積極的にしかも大きく径方向へズラして幅Ｗ方向で相互に離隔させることにより、２枚の分割平角導線Ｓａ、Ｓｂ間に軸方向の隙間Ｐを形成するわけである。このような軸方向の隙間Ｐは、コイルエンド群３０ａの突出高さ（軸方向長）に実質的に影響しないため、この軸方向の隙間Ｐを通風路として活用することにより、コイルエンド群３０ａを最短の突出高さ（軸方向長）で、かつ、風通しの良い構造とすることができる。 [Modified example of first bonded state]
In addition, according to the 1st joining form mentioned above, since the two division | segmentation rectangular conducting wire Sa and Sb will be juxtaposed in the width W direction in the junction parts 314 and 324, the slanting conductor part 313 is used as a modification. 323 can be provided with an axial ventilation passage (ventilation gap P). In other words, in the oblique conductor portions 313 and 323, the two divided rectangular conductors Sa and Sb are positively and greatly displaced in the radial direction before the joint portions 314 and 324, and are separated from each other in the width W direction. As a result, an axial gap P is formed between the two split rectangular conductive wires Sa and Sb. Since such an axial gap P does not substantially affect the protruding height (axial length) of the coil end group 30a, the coil end group 30a can be used by using the axial gap P as a ventilation path. Can have a structure with a minimum protrusion height (length in the axial direction) and good ventilation.

第２の接合形態である図６（ｂ）に示す例では、対となる導体セグメントＳ、Ｓ’は、すべて（４つずつ）の接合部３１４、３２４、３１４’、３２４’が、固定子鉄心２０の周方向に対してＩの字型に一列配置され、溶接玉Ｑで一体に溶接されている。
なお、対となる導体セグメントＳ、Ｓ’は、実施例１と同様に、各導体セグメントを構成する２枚の分割平角導線Ｓａ、Ｓｂが、斜状導体部３１３、３２３’のところで、曲がり部３１２、３２２’および接合用曲がり部３１５、３２５’の段差によって軸方向にズレて、通風用の隙間Ｐが形成される他に、一方の斜状導体部３１３と他方の斜状導体部３２３’とが、径方向に幅Ｗ／２分ずつ傾倒することで、対となる導体セグメントＳ、Ｓ’の接合部３１４、３２４同士が周方向に一列に配置されている。 In the example shown in FIG. 6B, which is the second joining form, the conductor segments S and S ′ to be paired are all (four by four) joining portions 314, 324, 314 ′ and 324 ′. One row is arranged in an I-shape with respect to the circumferential direction of the iron core 20 and is welded integrally with a welding ball Q.
As in the first embodiment, the pair of conductor segments S and S ′ is a bent portion where the two divided rectangular conductors Sa and Sb constituting each conductor segment are at the inclined conductor portions 313 and 323 ′. 312 and 322 ′ and the bent portions 315 and 325 ′ for joining are displaced in the axial direction to form a gap P for ventilation, and one oblique conductor portion 313 and the other oblique conductor portion 323 ′. However, by inclining by a width W / 2 in the radial direction, the joint portions 314 and 324 of the paired conductor segments S and S ′ are arranged in a row in the circumferential direction.

上記構成によれば、実施例１と同様な作用効果が得られることは勿論、次のごとき本実施形態特有の作用効果を奏する。
対となる導体セグメントＳ、Ｓ’において、接合部３１４、３２４、３１４’、３２４’全体の径方向における占有幅を最小幅にすることが可能となる。つまり、実質的に分割平角導線Ｓａ、Ｓｂの幅Ｗと同じ幅まで減らすことができるわけで、径方向に隣接する他相の導体セグメントとの電気的絶縁距離を充分確保し、より一層の小型化に貢献することができる。 According to the above configuration, the same operational effects as those of the first embodiment can be obtained, and the following specific operational effects can be obtained.
In the conductor segments S and S ′ to be paired, it is possible to minimize the occupied width in the radial direction of the entire joint portions 314, 324, 314 ′, and 324 ′. In other words, it can be reduced to substantially the same width as the width W of the divided rectangular conductors Sa and Sb, so that a sufficient electrical insulation distance from the conductor segments of other phases adjacent in the radial direction can be ensured, and the size can be further reduced. Can contribute.

［実施例３］
次に、本発明の実施例３について、実施例１との相違点を中心に図７に基づいて説明する。
導体セグメントＳにおいて、実施例１では、２枚の分割平角導線Ｓａ、Ｓｂの曲がり部３１２、３２２、３３２を実質的に同一の曲率半径にしているが、本実施例においては、２枚の分割平角導線Ｓａ、Ｓｂの曲がり部３１２、３２２、３３２の曲率半径を変えているのが最大の特徴である。
つまり、図７に示すように、２枚の分割平角導線Ｓａ、Ｓｂの曲がり部３１２、３２２、３３２は、すべてが固定子鉄心２０の軸方向に同心的に重畳されているものの、各曲がり部３１２、３２２、３３２のうち、外径側に位置する曲がり部３１２、３２２、３３２の曲率半径Ｒ１を、内径側に位置する曲がり部３１２、３２２、３３２の曲率半径Ｒ２に比して大きくすることで、外径側に位置する斜状導体部３１３、３２３、３３３と内径側に位置する斜状導体部３１３、３２３、３３３とを固定子鉄心２０の軸方向に対して徐々に離隔させて隙間Ｐを形成している。
要するに、各曲がり部３１２、３２２、３３２において、実施例１のごとき、破線で示す軸方向に直線状に突出する直行部分３１２ａ、３２２ａ、３３２ａを実質的になくするようにしたものである。 [Example 3]
Next, a third embodiment of the present invention will be described based on FIG. 7 with a focus on differences from the first embodiment.
In the conductor segment S, in the first embodiment, the bent portions 312, 322, and 332 of the two divided flat conductors Sa and Sb have substantially the same radius of curvature. The greatest feature is that the curvature radii of the bent portions 312, 322, and 332 of the flat conductive wires Sa and Sb are changed.
That is, as shown in FIG. 7, the bent portions 312, 322, and 332 of the two divided rectangular conductors Sa and Sb are all superimposed concentrically in the axial direction of the stator core 20, but each bent portion. Among the 312, 322, and 332, the radius of curvature R 1 of the bent portions 312, 322, and 332 positioned on the outer diameter side is made larger than the radius of curvature R 2 of the bent portions 312, 322, and 332 positioned on the inner diameter side. Thus, the slanted conductor portions 313, 323, 333 located on the outer diameter side and the slanted conductor portions 313, 323, 333 located on the inner diameter side are gradually separated from the axial direction of the stator core 20 to form a gap. P is formed.
In short, in each of the bent portions 312, 322, and 332, as in the first embodiment, the straight portions 312a, 322a, and 332a that protrude linearly in the axial direction indicated by the broken line are substantially eliminated.

上記構成の実施例３によれば、２枚の分割平角導線Ｓａ、Ｓｂのうち、外側に位置する分割平角導線Ｓａの曲がり部３１２、３２２、３３２には直行部分がなく、滑らかにコイルエンド群の外表面を形成するため、白抜き矢印に示す冷却風は曲がり部３１２、３２２、３３２に何ら遮られることなく、円滑に斜状導体部３１３、３２３、３３３へと誘導される。勿論、隙間Ｐ内においても、冷却風の良好な流線を確保することができる。よって、冷却風による良好な冷却効果が得られる。 According to the third embodiment having the above-described configuration, the bent portions 312, 322, and 332 of the divided rectangular conductive wire Sa located on the outer side of the two divided rectangular conductive wires Sa and Sb have no direct portions, and the coil end group smoothly In order to form the outer surface, the cooling air indicated by the white arrow is smoothly guided to the oblique conductor portions 313, 323, 333 without being interrupted by the bent portions 312, 322, 332. Of course, a good stream of cooling air can be secured even in the gap P. Therefore, a good cooling effect by the cooling air can be obtained.

［変形例］
以上本発明の固定子を３つの実施例について詳述してきたが、本発明の精神を逸脱しない範囲で種々変形することが可能であり、その変形例を例示する。 [Modification]
Although the three embodiments of the stator of the present invention have been described in detail above, various modifications can be made without departing from the spirit of the present invention, and modifications thereof are illustrated.

（１）上述の実施例では、導体セグメントＳを２枚の分割平角導線Ｓａ、Ｓｂで構成したが、３枚以上の分割平角導線を用いて構成するようにしても良い。
（２）上述の実施例では、第１、第２コイルエンド群３０ａ、３０ｂを形成する両側の斜状導体部３１３、３２３、３３３に隙間Ｐを形成したが、片側のみ、とりわけ、第１コイルエンド群３０ａを形成する側の斜状導体部３１３、３２３、３３３にのみ隙間Ｐを設けるようにしても良いことは勿論である。
（３）上述の実施例では、三相の固定子巻線３０の例として固定子鉄心２０の各スロット２１に４本の導体セグメントＳ１〜Ｓ４が挿入される固定子２について説明したが、固定子巻線３０の相数、巻線方式等に応じてスロット２１に挿入される導体セグメントの数は随時変更されるものであり、種々の固定子に適用することができる。 (1) In the above-described embodiment, the conductor segment S is composed of two divided rectangular conductors Sa and Sb, but may be configured using three or more divided rectangular conductors.
(2) In the above-described embodiment, the gap P is formed in the oblique conductor portions 313, 323, 333 on both sides forming the first and second coil end groups 30a, 30b, but only on one side, especially the first coil. Of course, the gap P may be provided only in the oblique conductor portions 313, 323, and 333 on the side where the end group 30a is formed.
(3) In the above-described embodiment, the stator 2 in which the four conductor segments S1 to S4 are inserted into each slot 21 of the stator core 20 as an example of the three-phase stator winding 30 has been described. The number of conductor segments inserted into the slot 21 is changed at any time according to the number of phases of the child winding 30, the winding method, etc., and can be applied to various stators.

（４）上述の実施例では、導体セグメントとして、一端にＵ字部を有するＵ字状導体セグメントＳを用いて固定子巻線３０を構成するようにしたが、Ｕ字部を含まないほぼ直線状の所謂Ｉ字状導体セグメントを用いて固定子巻線３０を構成する場合においても、Ｉ字状導体セグメントの両端にコイルエンド群を形成する斜状導体部をそれぞれ折曲形成するため、Ｉ字状導体セグメント自体を複数枚の分割平角導線で構成し、本発明を適用することができる。
（５）上述の実施例では、対となる導体セグメントＳ、Ｓ’の斜状導体部３１３、３２３、３１３’、３２３’を接合するための接合部３１４、３２４、３１４’、３２４’と、２枚の分割平角導線Ｓａ、Ｓｂ同士を接合する接合部とを兼用させ、両接合部を同時に溶接したが、上記（４）の変形例を含め、両者の接合部を個別に溶接しても良い。例えば、分割平角導線Ｓａ、Ｓｂ同士を固定子鉄心２０への組付け前にあらかじめ溶接しておき、固定子鉄心２０への組付け後に前者の接合部を溶接しても良い。 (4) In the above-described embodiment, the stator winding 30 is configured using the U-shaped conductor segment S having a U-shaped portion at one end as the conductor segment. Even when the stator winding 30 is configured using a so-called I-shaped conductor segment, the oblique conductor portions that form the coil end groups are bent at both ends of the I-shaped conductor segment. The character-shaped conductor segment itself can be composed of a plurality of divided rectangular conductors, and the present invention can be applied.
(5) In the above-described embodiment, the joint portions 314, 324, 314 ′, 324 ′ for joining the diagonal conductor portions 313, 323, 313 ′, 323 ′ of the paired conductor segments S, S ′; Although the joint part which joins two division | segmentation rectangular conducting wire Sa and Sb was combined and both joint parts were welded simultaneously, even if both joint parts were welded separately including the modification of said (4). good. For example, the split rectangular conductors Sa and Sb may be welded in advance before assembly to the stator core 20, and the former joint may be welded after assembly to the stator core 20.

（６）上述の実施例では、回転電機の一例として車両用交流発電機１について説明したが、平角導線を素線とする導体セグメントを複数本連続的に接合して固定子巻線を構成する固定子であれば、他の発電機や発電機以外の電動機（例えば高電圧高出力モータ）等の各種の回転電機に本発明を適用することができる。 (6) In the above-described embodiment, the vehicular AC generator 1 has been described as an example of a rotating electrical machine. However, a plurality of conductor segments each having a flat conductor wire as a strand are continuously joined to form a stator winding. If it is a stator, this invention is applicable to various rotary electric machines, such as other generators and electric motors (for example, high voltage high output motor) other than a generator.

以上詳述してきた本発明の固定子の特徴点および特記すべき作用効果を、特許請求の範囲に記載の各請求項（請求項１を除く請求項２〜請求項７）の手段にしたがって要約列挙すれば、次の通りである。 The characteristic points and special effects of the stator of the present invention described above in detail are summarized according to the means of each claim (claims 2 to 7 excluding claim 1). The list is as follows.

〔特徴点１＝請求項２の手段〕
請求項１に記載の固定子２において、斜状導体部３１３、３２３、３３３には、複数枚（例えば２枚）の分割平角導線Ｓａ、Ｓｂが厚みＴ方向で相互に離隔することで、固定子鉄心２０の径方向に対して開口する通風用の隙間Ｐが設けられていることを特徴としている（各実施例）。
上記構成によれば、斜状導体部３１３、３２３、３３３は、２枚の分割平角導線Ｓａ、Ｓｂが厚みＴ方向で固定子鉄心２０の軸方向に重畳して形成されているため、２枚の分割平角導線Ｓａ、Ｓｂを軸方向に離隔させても、薄肉部分を有効活用して、固定子巻線３０の第１、第２コイルエンド群３０ａ、３０ｂ自体の突出高さ（軸方向長）をさほど大きくすることなく、隙間Ｐを設けることができる。 [Feature 1 = Means of claim 2]
In the stator 2 according to claim 1, the slanted conductor portions 313, 323, and 333 are fixed to each other by separating a plurality of (for example, two) divided rectangular conductors Sa and Sb from each other in the thickness T direction. Ventilation gaps P that open in the radial direction of the core 20 are provided (each embodiment).
According to the above configuration, the oblique conductor portions 313, 323, and 333 are formed by overlapping the two divided rectangular conductors Sa and Sb in the thickness T direction in the axial direction of the stator core 20, so that Even if the split rectangular conductive wires Sa and Sb are separated in the axial direction, the protruding height (axial length) of the first and second coil end groups 30a and 30b of the stator winding 30 itself can be effectively utilized by utilizing the thin portion. ) Can be provided without much increase.

〔特徴点２＝請求項３の手段〕
請求項１に記載の固定子２において、斜状導体部３１３、３２３、３３３には、複数枚（例えば２枚）の分割平角導線Ｓａ、Ｓｂが幅Ｗ方向で相互に離隔することで、固定子鉄心２０の軸方向に対して開口する通風用の隙間Ｐが設けられていることを特徴としている（例えば、実施例２の変形例）。
上記構成によれば、コイルエンド群３０ａを最短の突出高さ（軸方向長）で、かつ、風通しの良い構造とすることができる。 [Feature 2 = Means of claim 3]
In the stator 2 according to claim 1, the slanted conductor portions 313, 323, and 333 are fixed to each other by separating a plurality of (for example, two) divided rectangular conductors Sa and Sb from each other in the width W direction. Ventilation gaps P that open in the axial direction of the core 20 are provided (for example, a modification of the second embodiment).
According to the said structure, the coil end group 30a can be made into the structure with the shortest protrusion height (axial direction length) and favorable ventilation.

〔特徴点３＝請求項４の手段〕
請求項２に記載の固定子２において、複数枚（例えば２枚）の分割平角導線Ｓａ、Ｓｂの曲がり部３１２、３２２、３３２は、すべてが固定子鉄心２０の軸方向に同心的に重畳されるものであり、曲がり部３１２、３２２、３３２のうち、外径側に位置する曲がり部３１２、３２２、３３２の曲率半径Ｒ１を、内径側に位置する曲がり部３１２、３２２、３３２の曲率半径Ｒ２に比して大きくすることで、外径側に位置する斜状導体部３１３、３２３、３３３と内径側に位置する斜状導体部３１３、３２３、３３３とを固定子鉄心２０の軸方向に対して徐々に離隔させて隙間Ｐを形成することを特徴としている（実施例３）。
上記構成によれば、各曲がり部３１２、３２２、３３２において、実施例１のごとき軸方向に直線状に突出する直行部分３１２ａ、３２２ａ、３３２ａを実質的になくすことができ、冷却風の良好な流線を確保することができる。よって、固定子巻線３０に対して、冷却風により良好な冷却効果が得られる。 [Feature point 3 = Means of claim 4]
In the stator 2 according to claim 2, all of the bent portions 312, 322, and 332 of the plurality of (for example, two) divided rectangular conductors Sa and Sb are concentrically superimposed in the axial direction of the stator core 20. Among the bent portions 312, 322, 332, the curvature radius R1 of the bent portions 312, 322, 332 located on the outer diameter side is the curvature radius R2 of the bent portions 312, 322, 332 located on the inner diameter side. By making it larger than the above, the oblique conductor portions 313, 323, 333 located on the outer diameter side and the oblique conductor portions 313, 323, 333 located on the inner diameter side are made to be in the axial direction of the stator core 20. A feature is that the gap P is formed by being gradually separated from each other (Example 3).
According to the said structure, in each bending part 312,322,332, the orthogonal part 312a, 3222 and 332a which protrudes linearly to an axial direction like Example 1 can be substantially eliminated, and favorable cooling air is good. Streamlines can be secured. Therefore, a good cooling effect is obtained for the stator winding 30 by the cooling air.

〔特徴点４＝請求項５の手段〕
請求項１〜４のいずれか１つに記載の固定子２において、対となる導体セグメントＳ、Ｓ’は、一方の導体セグメントＳの斜状導体部３１３、３２３と他方の導体セグメントＳ’の斜状導体部３１３’、３２３’とを接合するための接合部３１４、３２４、３１４’、３２４’を有していることを特徴としている（例えば、実施例１、３）。
上記構成によれば、対となる導体セグメントＳ、Ｓ’を、斜状導体部３１３、３２３、３１３’、３２３’同士で良好に接合することができる。 [Feature point 4 = Means of claim 5]
In the stator 2 according to any one of claims 1 to 4, a pair of conductor segments S, S 'is formed by the oblique conductor portions 313, 323 of one conductor segment S and the other conductor segment S'. It is characterized by having joint portions 314, 324, 314 ′, and 324 ′ for joining the oblique conductor portions 313 ′ and 323 ′ (for example, Embodiments 1 and 3).
According to the said structure, the conductor segments S and S 'used as a pair can be favorably joined by diagonal conductor part 313, 323, 313', 323 '.

〔特徴点５＝請求項６の手段〕
請求項５に記載の固定子２において、接合部３１４、３２４、３１４’、３２４’は、導体セグメントＳ、Ｓ’を構成する複数枚の分割平角導線Ｓａ、Ｓｂ同士を接合するための接合部を兼用しており、すべての接合部３１４、３２４、３１４’、３２４’が田の字型に集合配置され、一体に溶接されていることを特徴としている（実施例２の第１接合形態）。
上記構成によれば、接合作業を効率よく実施することができる。しかも、すべて（４つずつ）の接合部（例えば２つの接合部３１４と２つの接合部３２４’）を田の字型に集合配置しているため、溶接玉Ｑを小さくすることができ、隣接して配置される導体セグメントとの間に充分な電気的絶縁距離を確保できる。 [Feature 5 = Means of claim 6]
6. The stator 2 according to claim 5, wherein the joint portions 314, 324, 314 ′, and 324 ′ are joint portions for joining the plurality of divided rectangular conductors Sa and Sb that constitute the conductor segments S and S ′. And all the joints 314, 324, 314 ′, 324 ′ are collectively arranged in a square shape and are integrally welded (first joining form of the second embodiment). .
According to the said structure, joining work can be implemented efficiently. Moreover, since all (four by four) joints (for example, two joints 314 and two joints 324 ′) are collectively arranged in a square shape, the weld balls Q can be made small and adjacent to each other. Thus, a sufficient electrical insulation distance can be secured between the conductor segment and the conductor segment.

〔特徴点６＝請求項７の手段〕
請求項５に記載の固定子２において、接合部３１４、３２４、３１４’、３２４’は、導体セグメントＳ、Ｓ’を構成する複数枚の分割平角導線Ｓａ、Ｓｂ同士を接合するための接合部を兼用しており、すべての接合部３１４、３２４、３１４’、３２４’が固定子鉄心２０の径方向に対してＩの字型に一列配置され、一体に溶接されていることを特徴としている（実施例２の第２接合形態）。
上記構成によれば、電気抵抗が大きく必然的に発熱も大きくなる接合部３１４、３２４、３１４’、３２４’全体を径方向に薄く延びる扁平状態にすることができるため、表面積を大きくし放熱を促進することができる。 [Feature 6 = Means of Claim 7]
6. The stator 2 according to claim 5, wherein the joint portions 314, 324, 314 ′, and 324 ′ are joint portions for joining the plurality of divided rectangular conductors Sa and Sb that constitute the conductor segments S and S ′. All the joints 314, 324, 314 ′, 324 ′ are arranged in a line in an I shape with respect to the radial direction of the stator core 20 and are integrally welded. (The 2nd joining form of Example 2).
According to the above configuration, the entire joints 314, 324, 314 ′, and 324 ′, which have large electrical resistance and inevitably generate heat, can be flattened to extend thinly in the radial direction. Can be promoted.

１…車両用交流発電機（回転電機）、２…固定子、２０…固定子鉄心、２１…スロット、３０…固定子巻線、３１１、３２１…導体挿通部、３１２、３２２、３３２…曲がり部、３１３、３２３、３３３…斜状導体部、Ｐ…隙間、Ｓ…導体セグメント、Ｓａ、Ｓｂ…分割平角導線。 DESCRIPTION OF SYMBOLS 1 ... Vehicle alternator (rotary electric machine), 2 ... Stator, 20 ... Stator core, 21 ... Slot, 30 ... Stator winding, 311, 321 ... Conductor insertion part, 312, 322, 332 ... Bending part 313, 323, 333... Oblique conductor, P... Gap, S... Conductor segment, Sa, Sb.

Claims

An annular stator core (20) having a slot (21) on the inner peripheral side, and a stator winding (30) wound around the stator core (20), the stator winding ( In the stator (2) of the rotating electrical machine (1), wherein 30) is formed by continuously joining a plurality of conductor segments (S) each having a flat rectangular wire as a strand,
The conductor segment (S) is composed of a plurality of divided rectangular conductive wires (Sa, Sb) having a dimensional relationship of W> T having a thickness T smaller than the width W,
The plurality of split rectangular conductors (Sa, Sb) are inserted into the slot (21) so as to overlap the circumferential direction of the stator core (20) in the thickness T direction, and the width W direction is the stator core. Conductor insertion portions (311, 321) disposed along the radial direction of (20),
One end is connected to the conductor insertion portion (311, 321), and is bent in the thickness T direction when protruding in the axial direction from the slot (21) (312, 322, 332),
It has a slanted conductor portion (313, 323, 333) that is connected to the other end of the bent portion (312, 322, 332) and that is inclined in the circumferential direction with respect to the stator core (20). And
The oblique conductor portions (313, 323, 333) are provided with a gap (P) for ventilation by separating the plurality of divided rectangular conductive wires (Sa, Sb) from each other. The stator (2) of the rotating electrical machine (1).

In the stator (2) of the rotating electrical machine (1) according to claim 1,
The diagonal conductor portions (313, 323, 333) are separated from each other in the thickness T direction by separating the plurality of divided rectangular conductive wires (Sa, Sb) with respect to the radial direction of the stator core (20). The stator (2) of the rotating electrical machine (1) is provided with the gap (P) that forms a ventilation path.

In the stator (2) of the rotating electrical machine (1) according to claim 1,
The inclined conductor portions (313, 323, 333) are separated from each other in the width W direction by separating the plurality of divided rectangular conductors (Sa, Sb) from the axial direction of the stator core (20). The stator (2) of the rotating electrical machine (1) is provided with the gap (P) that forms a ventilation path.

In the stator (2) of the rotating electrical machine (1) according to claim 2,
All of the bent portions (312, 322, 332) of the plurality of divided rectangular conductors (Sa, Sb) are concentrically superimposed in the axial direction of the stator core (20),
Among the bent portions (312, 322, 332), the radius of curvature (R1) of the bent portion (312, 322, 332) positioned on the outer diameter side is set to the bent portion (312, 322, 332), positioned on the inner diameter side. 332) larger than the radius of curvature (R2), the oblique conductor portions (313, 323, 333) located on the outer diameter side and the oblique conductor portions (313, 323) located on the inner diameter side. 333) is gradually separated from the axial direction of the stator core (20) to form the gap (P), and the stator (2) of the rotating electrical machine (1).

In the stator (2) of the rotating electrical machine (1) according to any one of claims 1 to 4,
The conductor segments (S, S ′) to be paired include the oblique conductor portions (313, 323) of one conductor segment (S) and the oblique conductor portions (313, 313) of the other conductor segment (S ′). 323), the stator (2) of the rotating electrical machine (1) having joint portions (314, 324, 314 ′, 324 ′) for joining to the stator (2).

In the stator (2) of the rotating electrical machine (1) according to claim 5,
The joint portions (314, 324, 314 ′, 324 ′) also serve as joint portions for joining the plurality of divided rectangular conductive wires (Sa, Sb) constituting the conductor segment (S, S ′). And a stator (1) of the rotating electrical machine (1), wherein all the joints (314, 324, 314 ', 324') are collectively arranged in a square shape and welded together. 2).

In the stator (2) of the rotating electrical machine (1) according to claim 5,
The joint portions (314, 324, 314 ′, 324 ′) also serve as joint portions for joining the plurality of divided rectangular conductive wires (Sa, Sb) constituting the conductor segment (S, S ′). All the joint portions (314, 324, 314 ′, 324 ′) are arranged in a line in an I shape with respect to the radial direction of the stator core (20) and are integrally welded. A stator (2) of a rotating electrical machine (1) characterized by