JP4061788B2 - Sequentially joined coil of pine needle conductor of rotating electric machine - Google Patents

Sequentially joined coil of pine needle conductor of rotating electric machine Download PDF

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Publication number
JP4061788B2
JP4061788B2 JP29496199A JP29496199A JP4061788B2 JP 4061788 B2 JP4061788 B2 JP 4061788B2 JP 29496199 A JP29496199 A JP 29496199A JP 29496199 A JP29496199 A JP 29496199A JP 4061788 B2 JP4061788 B2 JP 4061788B2
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Prior art keywords
conductor
pine needle
coil
circumferential direction
rotating electrical
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JP29496199A
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JP2001119881A (en
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武司 山本
裕章 梶浦
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Denso Corp
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Denso Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、回転電機の松葉状導体順次接合型コイルに関する。
【0002】
【従来の技術】
本出願人の出願になる特開平11−75346号公報は、松葉状導体順次接合型コイルを有する回転電機を開示している。
【0003】
この回転電機のステータコイルは、円筒状のステータコアの内周面近傍に軸方向へ形成される多数のスロットにたとえばフロント側から多数の松葉状導体(松葉状導体)を挿通し、ステータコアのリア側に突出した各松葉状導体の先端を他の松葉状導体の先端に順次接続して形成されている。
【0004】
各松葉状導体は、スロットに挿入されている直線部分である一対のスロット導体部と、両端がスロット導体部の基端に連なるフロント側の露出部分であるU字状の基端側コイルエンドと、両スロット導体部からステータコアの反基端側コイルエンド側に突出して相互に順次接合されるリア側の露出部分である部分である先端側コイルエンドに区分される。
【0005】
【発明が解決しようとする課題】
本発明者らによるこの松葉状導体順次接続型ステータコイルの試作例を図5〜図9に示す。
【0006】
1は基端側コイルエンド、2はステータコア、3はスロットである。松葉状導体の基端側コイルエンド1は、略径方向及び略軸方向に延在するC字状の頭部11、頭部11の径内側(ステータコアの)から周方向一方側へ延在する第一の脚部12と、頭部11の径外側から周方向他方側へ延在する第二の脚部13とからなる。
【0007】
図7、図8に明らかなように、第一の脚部12は、周方向一方側へ延在する周方向延在部121と、この周方向延在部121の先端から軸方向に伸びてスロット導体部4に連なる軸方向延在部122とからなる。同じく、図7、図8に明らかなように、第二の脚部13は、周方向一方側へ延在する周方向延在部131と、この周方向延在部131の先端から軸方向に伸びてスロット導体部5に連なる軸方向延在部132とからなる。松葉状導体は、銅板を打ち抜いて形成し、基端側コイルエンド1の両脚部12、13を周方向反対側に電気角で約πだけ捻った後、ステータコアにスロット導体部を挿入される。
【0008】
したがって、松葉状導体の通電直角方向における厚さは、製造公差(本明細書では上記松葉状導体の曲げ加工による塑性的な寸法変化をいうものとする)を超えない範囲で一定であり、また、松葉状導体の通電直角方向における幅も、従来の丸線コイル又は平角線コイルと同じく製造公差(本明細書では上記松葉状導体の曲げ加工による塑性的な寸法変化をいうものとする)を超えない範囲で一定とした。
【0009】
しかしながら、本発明者らは、上記松葉状導体順次接続型ステータコイルをステータコアのスロットに挿通した場合、次の問題点が生じることを見出した。
【0010】
5本の松葉状導体1を周方向に隣接する5つのスロットに個別に挿通した状態における5つの基端側コイルエンド1の配列状態を図9に示す。110は、頭部11の外周縁、111は頭部11の内周縁、112は内周縁111の径内側部分(ステータコアから離れた径小側の部分)、113は内周縁111の径外側部分(ステータコアに接近する径大側の部分)である。aは頭部11の周方向反時計側に向いた側面、bは頭部11の周方向時計側に向いた側面である。ただし、一つの頭部11の側面bと、この頭部11に対して周方向時計側に隣接する頭部11の側面aとは、径方向中央部cで図9の紙面上で表裏に交差するが交差線の図示は省略している。
【0011】
図9から、各基端側コイルエンド1の内周縁111近傍において、径内側部分112が脚部12に引きずられて周方向左側に曲がり、径外側部分113が脚部13に引きずられて周方向右側に曲がっていることがわかる。
【0012】
また、周方向に互いに隣接する一対の頭部11において、左側の頭部11の内周縁111の径外側部分113と、右側の頭部11の内周縁111の径内側部分112とが周方向に交差していることがわかる。
【0013】
この時、左側の頭部11の内周縁111の径外側部分113と、右側の頭部11の内周縁111の径内側部分112とが近接しているので接触しやすく、表面の樹脂絶縁膜が損傷したりして電気絶縁性が低下し、コイル短絡が生じやすい。
【0014】
本発明は、上記問題点に鑑みなされたものであり、工程を複雑化することなく松葉状導体順次接続型ステータコイルの基端側コイルエンドにおける電気絶縁性を向上することをその目的としている。
【0015】
【課題を解決するための手段】
上記課題を解決するためになされた請求項1記載の回転電機によれば、基端側コイルエンドの周方向にみた場合における最小内周縁曲率半径rを、この基端側コイルエンドに連なる一対のスロット導体部間の径方向ギャップ長dより大きい内周曲部を頭部の内周縁に接して設けた点をその特徴としている。
【0016】
このようにすれば、松葉状導体順次接続型ステータコイルの基端側コイルエンドにおける電気絶縁性を向上することができる。
【0017】
すなわち、図6〜図9を参照して説明すれば、基端側コイルエンド1の内周縁111の互いに周方向反対側に曲がっている径内側部分112と径外側部分113とが、この内周曲部の大きさだけ深くえぐられているために、周方向に互いに隣接する一対の頭部11において、左側の頭部11の内周縁111の径外側部分113と、右側の頭部11の内周縁111の径内側部分112とが接触しにくくなり、これにより両者の接触を防止できるものである。
【0018】
たとえば、この松葉状導体を平板打ち抜き加工により作製する場合には特に、特別の加工を必要とすることなく内周曲部を形成できるため、工程延長によるコスト増加は生じない利点が生じる。
【0019】
請求項2記載の構成によれば請求項1記載の回転電機の松葉状導体順次接合型コイルにおいて更に、基端側コイルエンドは、スロット導体部の径方向幅よりも製造公差を超えて異なる通電直角方向幅(ここではスロット導体部の径方向表面部に連なる面の幅をいう)。
【0020】
このようにすれば、製造工程を増加させることなく、用途に応じて基端側コイルエンドの電気抵抗値及び収容スペース形状の好適な組み合わせを選択することができ、また、基端側コイルエンドの内周縁形状を自由に設計して、上記説明したコイル短絡問題も解決することができる。
【0021】
請求項3記載の構成によれば請求項2記載の回転電機の松葉状導体順次接合型コイルにおいて更に、基端側コイルエンドの通電直角方向幅(通電方向と直角方向の幅)はスロット導体部の径方向幅よりも製造公差を超えて狭くされる。
【0022】
このようにすれば、コイルエンドの必要スペースを縮小して、回転電機の全体体格を縮小でき、コイル重量も減らして軽量化を図ることができる。
【0023】
請求項4記載の構成によれば請求項3記載の回転電機の松葉状導体順次接合型コイルにおいて更に、基端側コイルエンドは周方向にみた場合にスロット導体部の径方向幅よりも狭い軸方向幅を有する。
【0024】
このようにすれば、回転電機のコイルエンド収容スペースの軸方向幅を縮小できるので、回転電機の軸方向長を圧縮することができる。
【0025】
請求項5記載の構成によれば請求項3記載の回転電機の松葉状導体順次接合型コイルにおいて更に、基端側コイルエンドは、周方向にみた場合にスロット導体部の径方向幅よりも狭い径方向幅を有する。
【0026】
このようにすれば、回転電機のコイルエンド収容スペースの径方向幅を縮小できるので、コアの軸方向両側のコイルエンド収容空間にたとえば水冷パイプやモータ制御などの回路基板などを配置することが容易となり、設計自由度を向上することができる。
【0027】
請求項6記載の構成によれば請求項2記載の回転電機の松葉状導体順次接合型コイルにおいて更に、基端側コイルエンドは、スロット導体部の径方向幅よりも製造公差を超えて広い通電直角方向幅を有する。
【0028】
このようにすれば、製造工程を増加させることなく、コイルの電気抵抗値及びそれによる銅損を低減することができる。
【0029】
請求項7記載の構成によれば請求項2乃至6のいずれか記載の回転電機の松葉状導体順次接合型コイルにおいて更に、内周曲部は、周方向にみた場合に略軸方向に伸びる軸方向辺部、及び、周方向にみた場合に略径方向に伸びる径方向辺部を有するので、内周曲部をいたずらに大きくして基端側コイルエンドにおける平均コイル長を増加することなく、上記コイル短絡防止を図ることができる。
【0030】
請求項8記載の構成によれば請求項2乃至7のいずれか記載の回転電機の松葉状導体順次接合型コイルにおいて更に、基端側コイルエンドの外周縁は、周方向にみた場合に略軸方向に伸びる軸方向辺部、及び、周方向にみた場合に略径方向に伸びる径方向辺部を有する。
【0031】
このようにすれば、コアの軸方向両側のコイルエンド収容空間の径方向高さ又は軸方向長さの増加を抑止して回転電機の体格増大を防止しつつ、かつ、製造工程の増加を招くことなく、コイルの電気抵抗値の低減及びそれによる銅損低減を図ることができる。
【0032】
請求項9記載の構成によれば、請求項2記載の効果を奏することができる。
【0033】
請求項10記載の構成によれば、上記請求項9記載の効果を奏することができる。
【0034】
請求項11記載の構成によれば、請求項10記載の効果を奏することができる。
【0035】
請求項12記載の構成によれば、請求項10記載の効果を奏することができる。
【0036】
請求項13記載の構成によれば、請求項6記載の効果を奏することができる。
【0037】
請求項14記載の構成によれば、請求項7記載の効果を奏することができる。
【0038】
請求項15記載の構成によれば、請求項8記載の効果を奏することができる。
【0039】
請求項16記載の構成によれば、請求項8記載の効果を一層向上することができる。
【0040】
【発明の実施の形態】
以下、この発明を適用した回転電機の松葉状導体接合型コイル(松葉状導体順次接続型コイルともいう)を図面を参照して説明する。
【0041】
なお、以下の各実施例の松葉状導体順次接続型ステータコイルは図5〜図9で既に説明した松葉状導体順次接続型ステータコイルと同一構造を有し、その基端側コイルエンドの外周縁及び内周縁の形状のみ異なるだけであるので、図5〜図9の符号の示す構成要素と主要機能が共通する構成要素には同一符号を付すものとする。
【0042】
【実施例1】
実施例1の松葉状導体順次接続型ステータコイルの基端側コイルエンドを図1、図2を参照して説明する。
【0043】
多数の松葉状導体がまず準備される。各松葉状導体は従来同様、基端側コイルエンド1と、基端側コイルエンド1の両先端に連なる直線状の一対のスロット導体部4、5と、各スロット導体部4、5の先端に連なるとともにコア2の反対側に突出する先端側コイルエンド(図示せず)とを有する。
【0044】
1は松葉状導体の基端側コイルエンド1、2はステータコア、3はスロットである。松葉状導体の基端側コイルエンド1は、略径方向及び略軸方向に延在するC字状の頭部11、頭部11の径内側(ステータコアの)から周方向一方側へ延在する第一の脚部12と、頭部11の径外側から周方向他方側へ延在する第二の脚部13とからなる。
【0045】
この基端側コイルエンド1は、銅平角線に樹脂被覆後、図7、図8に示すように、第一の脚部12を折り曲げて、周方向一方側へ延在する周方向延在部121と、この周方向延在部121の先端から軸方向に伸びてスロット導体部4に連なる軸方向延在部122とを設け、同じく、第二の脚部13を折り曲げて、周方向一方側へ延在する周方向延在部131と、この周方向延在部131の先端から軸方向に伸びてスロット導体部5に連なる軸方向延在部132とを設け、スロット導体部4、5を互いに周方向に電気角π異なる一対のスロットの径方向異なるスロット導体収容位置に個別に収容してなる。その後、従来同様、各先端側コイルエンドの両先端を所定の順序に接合してステータコイルとする。
【0046】
図2において、Rは基端側コイルエンド1の頭部11の外周縁110の曲率半径、rは基端側コイルエンド1の頭部11の内周縁111の曲率半径、Wはスロット導体部4、5の径方向幅、dはスロット導体部4、5の間の径方向ギャップである。
【0047】
この実施例では、図2に示すように、基端側コイルエンド1の頭部11に内周縁111に隣接して内周縁11114を凹設している。曲率中心mを中心とする内周縁111(内周曲部114)の曲率半径rは一対のスロット導体部4、5の間の径方向ギャップdよりも大きく設定される。
【0048】
このようにすれば、内周曲部114が大きいために、図9を用いて前に説明したところの周方向に隣接する一対の頭部11の内周縁111の径内側部分112と径外側部分113との交差時の接触を防止することができ、コイルの部分短絡を防止することができる。
【0049】
なお、図2における一点鎖線は、基端側コイルエンド1の頭部11と脚部12、13とスロット導体部4、5とを区分するためのものである。
【0050】
【実施例2】
実施例2の松葉状導体順次接続型ステータコイルの基端側コイルエンドを図3を参照して説明する。この実施例の基端側コイルエンド1は、図5〜図9に示すコイルエンド1の外周縁110及び内周縁111の形状を変更したものである。
【0051】
この実施例の基端側コイルエンド1では、その径方向幅は、スロット導体部4、5の幅2Wとそれらの間の径方向ギャップdとの和以下とされている。また、基端側コイルエンド1の脚部12の径内側の表面117はスロット導体部4の径内側表面40と同直線上又はそれより径外側に設けられ、基端側コイルエンド1の脚部13の径外側の表面118はスロット導体部5の径外側表面50と同直線上又はそれより径外側に設けられている。
【0052】
更に、基端側コイルエンド1の頭部11の外周縁110は、径内側表面40と径外側表面50との範囲内に設けられ、更にその上、頭部11の最大軸方向幅W1はスロット導体部4、5の径方向幅Wより狭くされている。
【0053】
このようにすれば、内周曲部114によりコイル短絡を防止できるとともに、回転電機のコイルエンド収容空間の増大を防いで回転電機の体格増大を防止することができ、コイル重量も低減することができる。
【0054】
【実施例3】
実施例3の松葉状導体順次接続型ステータコイルの基端側コイルエンドを図4を参照して説明する。この実施例の基端側コイルエンド1は、図3に示すコイルエンド1の外周縁110及び内周縁111の形状を変更したものである。
【0055】
この実施例の基端側コイルエンド1では、その径方向幅は、スロット導体部4、5の幅2Wとそれらの間の径方向ギャップdとの和以下とされている。また、基端側コイルエンド1の脚部12の径内側の表面117及び頭部11の径内側の辺部119はスロット導体部4の径内側表面40と同直線上又はそれより径外側に設けられ、基端側コイルエンド1の脚部13の径外側の表面118及び頭部11の径外側の辺部120はスロット導体部5の径外側表面50と同直線上又はそれより径外側に設けられている。更に、基端側コイルエンド1の頭部11の外周縁110は、径方向に延在する辺部121を有する。
【0056】
すなわち、この実施例の基端側コイルエンド1は周方向に見て略面取りした四角形形状を有し、これにより、回転電機のコイルエンド収容スペースの径方向幅又は軸方向長を増大することなく、更に製造工程の複雑化を招くことなくコイルの電気抵抗を低減することができる。
【0057】
更にこの実施例では、内周曲部114を囲む基端側コイルエンド1の内周縁111も、周方向にみて軸方向に延在する軸方向延在辺部115と、周方向にみて径方向に延在する径方向延在辺部116とをもち、周方向にみて略面取り四角形に形成される。このようにすれば内周曲部114の面積を減らしつつ、上記コイル短絡問題を良好に防止することができる。
【0058】
更にその上、この実施例では、頭部11の最大軸方向幅W1はスロット導体部4、5の径方向幅Wより狭くされているので、回転電機のコイルエンド収容空間の増大を防いで回転電機の体格増大を防止することができ、コイル重量も低減することができる。
【図面の簡単な説明】
【図1】 実施例1の回転電機の松葉状導体接合型コイルの要部斜視図である。
【図2】 図1に示す松葉状導体の基端側コイルエンドを示す平面図である。
【図3】 実施例2の松葉状導体の基端側コイルエンドを示す平面図である。
【図4】 実施例3の松葉状導体の基端側コイルエンドを示す平面図である。
【図5】 参考例の回転電機の松葉状導体接合型コイルの要部斜視図である。
【図6】 図5に示す松葉状導体の基端側コイルエンドを示す平面図である。
【図7】 図6に示す松葉状導体の基端側コイルエンドを示す正面図である。
【図8】 図6、図7に示す松葉状導体の基端側コイルエンドを示す側面図である。
【図9】 図5〜図8に示す松葉状導体を5本配列した状態を示す配列図である。
【符号の説明】
1は松葉状導体の基端側コイルエンド、2はステータコア(コア)、3はスロット、4、5はスロット導体部、11は頭部、12は脚部(第一の脚部)、13は脚部(第二の脚部)、110は頭部11の外周縁、111は基端側コイルエンド1の内周縁、114は基端側コイルエンド1の内周曲部、Wはスロット導体部4、5の径方向幅、W1は頭部11の軸方向幅、115は内周曲部114の軸方向辺部、116は内周曲部114の径方向辺部、117〜120は基端側コイルエンド1の外周縁110の軸方向辺部、121は基端側コイルエンド1の外周縁110の径方向辺部。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pine needle conductor sequential junction type coil of a rotating electrical machine.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 11-75346, filed by the present applicant, discloses a rotating electrical machine having a pine needle-like conductor sequentially joined type coil.
[0003]
The stator coil of this rotating electrical machine has a large number of pine needle conductors (pine needle conductors) inserted from, for example, the front side into a large number of slots formed in the axial direction in the vicinity of the inner peripheral surface of the cylindrical stator core. Are formed by sequentially connecting the tips of the pine needle conductors protruding to the tips of the other pine needle conductors.
[0004]
Each pine needle-shaped conductor includes a pair of slot conductor portions that are straight portions inserted into the slots, and a U-shaped proximal end coil end that is an exposed portion on the front side that is connected to the proximal ends of the slot conductor portions at both ends. , It is divided into a distal end side coil end that is a portion that is an exposed portion on the rear side that protrudes from both slot conductor portions to the coil end side opposite to the proximal end of the stator core and is sequentially joined to each other.
[0005]
[Problems to be solved by the invention]
A prototype of this pine needle conductor sequential connection type stator coil by the present inventors is shown in FIGS.
[0006]
Reference numeral 1 denotes a proximal end coil end, 2 a stator core, and 3 a slot. The proximal end coil end 1 of the pine needle-like conductor extends from the radially inner side (of the stator core) of the C-shaped head 11 extending substantially in the radial direction and in the axial direction to one side in the circumferential direction. It consists of a first leg 12 and a second leg 13 extending from the radially outer side of the head 11 to the other circumferential side.
[0007]
As apparent from FIGS. 7 and 8, the first leg portion 12 extends in the axial direction from the circumferentially extending portion 121 extending to one side in the circumferential direction and the tip of the circumferentially extending portion 121. It consists of an axially extending portion 122 that continues to the slot conductor portion 4. Similarly, as clearly shown in FIGS. 7 and 8, the second leg portion 13 includes a circumferentially extending portion 131 that extends to one side in the circumferential direction and an axial direction from the tip of the circumferentially extending portion 131. An axially extending portion 132 extending and continuing to the slot conductor portion 5 is formed. The pine needle-shaped conductor is formed by punching a copper plate, and after twisting the legs 12 and 13 of the proximal end coil end 1 to the opposite side in the circumferential direction by an electrical angle of about π, the slot conductor portion is inserted into the stator core.
[0008]
Accordingly, the thickness of the pine needle conductor in the direction perpendicular to the energization is constant within a range not exceeding the manufacturing tolerance (in this specification, the plastic dimensional change due to bending of the pine needle conductor). The width of the pine needle conductor in the direction perpendicular to the energization is the same as that of the conventional round wire coil or rectangular wire coil, with manufacturing tolerances (referred to herein as a plastic dimensional change due to bending of the pine needle conductor). It was fixed within the range not exceeding.
[0009]
However, the present inventors have found that the following problems arise when the pine needle conductor sequential connection type stator coil is inserted through the slot of the stator core.
[0010]
FIG. 9 shows an arrangement state of the five proximal end coil ends 1 in a state where the five pine needle conductors 1 are individually inserted into five slots adjacent in the circumferential direction. 110 is an outer peripheral edge of the head 11, 111 is an inner peripheral edge of the head 11, 112 is a radially inner portion of the inner peripheral edge 111 (a portion on the smaller diameter side away from the stator core), and 113 is a radially outer portion of the inner peripheral edge 111 ( This is a large-diameter portion approaching the stator core). a is a side surface of the head portion 11 facing toward the counterclockwise direction in the circumferential direction, and b is a side surface of the head portion 11 facing toward the circumferentially clockwise direction. However, the side surface b of one head 11 and the side surface a of the head 11 adjacent to the head 11 in the circumferential clockwise direction intersect with each other on the paper surface of FIG. However, the illustration of the intersection line is omitted.
[0011]
From FIG. 9, in the vicinity of the inner peripheral edge 111 of each proximal end coil end 1, the radially inner portion 112 is dragged to the leg portion 12 and bent to the left in the circumferential direction, and the radially outer portion 113 is dragged to the leg portion 13 to circumferentially. You can see that it is bent to the right.
[0012]
Further, in a pair of heads 11 adjacent to each other in the circumferential direction, a radially outer portion 113 of the inner peripheral edge 111 of the left head portion 11 and a radially inner portion 112 of the inner peripheral edge 111 of the right head portion 11 are in the circumferential direction. You can see that they intersect.
[0013]
At this time, since the radially outer portion 113 of the inner peripheral edge 111 of the left head portion 11 and the inner diameter portion 112 of the inner peripheral edge 111 of the right head portion 11 are close to each other, they are easy to contact, and the resin insulating film on the surface The electrical insulation properties are reduced due to damage, and a coil short circuit is likely to occur.
[0014]
The present invention has been made in view of the above problems, and an object of the present invention is to improve the electrical insulation at the proximal end side coil end of the pine needle conductor sequential connection type stator coil without complicating the process.
[0015]
[Means for Solving the Problems]
According to the rotating electrical machine according to claim 1, which has been made to solve the above-described problem, the minimum inner peripheral edge radius of curvature r when viewed in the circumferential direction of the base end side coil end is set to a pair of base end side coil ends. It is characterized in that an inner circumferential curved part larger than the radial gap length d between the slot conductor parts is provided in contact with the inner peripheral edge of the head.
[0016]
If it does in this way, the electrical insulation in the base end side coil end of a pine needle-like conductor sequential connection type stator coil can be improved.
[0017]
That is, if it demonstrates with reference to FIGS. 6-9, the inner diameter part 112 and the outer diameter part 113 which are curving to the circumferential direction opposite side of the inner periphery 111 of the base end side coil end 1 will be this inner periphery. In the pair of heads 11 that are adjacent to each other in the circumferential direction, the outer side portion 113 of the inner periphery 111 of the left head 11 and the inner portion of the right head 11 are removed. This makes it difficult for the radially inner portion 112 of the peripheral edge 111 to come into contact with each other, thereby preventing contact between the two.
[0018]
For example, particularly when this pine needle conductor is manufactured by flat plate punching, the inner peripheral curved portion can be formed without requiring special processing, so that there is an advantage that the cost is not increased by extending the process.
[0019]
According to the configuration of the second aspect, in the pine needle conductor sequential junction type coil of the rotating electric machine according to the first aspect, the proximal end coil end is different in energization different from the radial width of the slot conductor portion by exceeding the manufacturing tolerance. Width in the perpendicular direction (here, the width of the surface connected to the radial surface portion of the slot conductor portion).
[0020]
In this way, it is possible to select a suitable combination of the electrical resistance value of the proximal end coil end and the shape of the accommodation space according to the application without increasing the manufacturing process. The inner peripheral shape can be freely designed to solve the above-described coil short-circuit problem.
[0021]
According to the configuration of claim 3, in the pine needle conductor sequential junction type coil of the rotating electrical machine according to claim 2, the energization perpendicular direction width (width in the direction perpendicular to the energization direction) of the base end side coil end is the slot conductor portion. It is narrower than the manufacturing tolerance than the radial width.
[0022]
If it does in this way, the required space of a coil end can be reduced, the whole physique of a rotary electric machine can be reduced, coil weight can also be reduced and weight reduction can be achieved.
[0023]
According to the configuration of the fourth aspect, in the pine needle conductor sequential junction type coil of the rotating electric machine according to the third aspect, the proximal end coil end is a shaft narrower than the radial width of the slot conductor portion when viewed in the circumferential direction. It has a direction width.
[0024]
In this way, since the axial width of the coil end accommodation space of the rotating electrical machine can be reduced, the axial length of the rotating electrical machine can be compressed.
[0025]
According to the fifth aspect of the present invention, the proximal end side coil end is narrower than the radial width of the slot conductor portion when viewed in the circumferential direction. It has a radial width.
[0026]
In this way, since the radial width of the coil end accommodation space of the rotating electrical machine can be reduced, it is easy to arrange, for example, a water-cooled pipe or a circuit board for motor control in the coil end accommodation spaces on both axial sides of the core. Thus, the degree of freedom in design can be improved.
[0027]
According to the configuration of the sixth aspect, in the pine needle conductor sequential junction type coil of the rotating electric machine according to the second aspect, the proximal end coil end is wider in current than the radial width of the slot conductor portion, exceeding the manufacturing tolerance. It has a perpendicular width.
[0028]
If it does in this way, the electrical resistance value of a coil and the copper loss by it can be reduced, without increasing a manufacturing process.
[0029]
According to a seventh aspect of the present invention, in the pine needle conductor sequential junction type coil of the rotating electrical machine according to any one of the second to sixth aspects, the inner circumferential curved portion is a shaft extending substantially in the axial direction when viewed in the circumferential direction. Since it has a radial side that extends in the radial direction when viewed in the direction side and the circumferential direction, without increasing the average coil length in the proximal end coil end by unnecessarily enlarging the inner circumferential curved portion, The coil short circuit can be prevented.
[0030]
According to the structure of the eighth aspect, in the pine needle conductor sequential junction type coil of the rotating electrical machine according to any one of the second to seventh aspects, the outer peripheral edge of the proximal end coil end is substantially an axis when viewed in the circumferential direction. It has an axial side portion extending in the direction and a radial side portion extending substantially in the radial direction when viewed in the circumferential direction.
[0031]
In this way, an increase in the radial height or axial length of the coil end accommodating space on both axial sides of the core is suppressed to prevent an increase in the size of the rotating electrical machine, and an increase in the manufacturing process is caused. Therefore, it is possible to reduce the coil electrical resistance value and thereby reduce the copper loss.
[0032]
According to the structure of Claim 9, there can exist the effect of Claim 2.
[0033]
According to the structure of Claim 10, there can exist an effect of the said Claim 9.
[0034]
According to the structure of Claim 11, there can exist the effect of Claim 10.
[0035]
According to the structure of Claim 12, the effect of Claim 10 can be produced.
[0036]
According to the structure of Claim 13, the effect of Claim 6 can be produced.
[0037]
According to the structure of Claim 14, the effect of Claim 7 can be produced.
[0038]
According to the structure of Claim 15, the effect of Claim 8 can be produced.
[0039]
According to the structure of Claim 16, the effect of Claim 8 can be improved further.
[0040]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a pine needle conductor junction type coil (also referred to as a pine needle conductor sequential connection type coil) of a rotating electrical machine to which the present invention is applied will be described with reference to the drawings.
[0041]
In addition, the pine needle conductor sequential connection type stator coil of each of the following embodiments has the same structure as the pine needle conductor sequential connection type stator coil already described in FIGS. 5 to 9, and the outer peripheral edge of the proximal end coil end. In addition, since only the shape of the inner peripheral edge is different, the same reference numerals are given to the constituent elements having the same main functions as the constituent elements indicated by the reference numerals in FIGS.
[0042]
[Example 1]
A proximal end side coil end of the pine needle conductor sequential connection type stator coil according to the first embodiment will be described with reference to FIGS. 1 and 2.
[0043]
A number of pine needle conductors are first prepared. Each pine needle-like conductor is provided at the distal end of the base end side coil end 1, a pair of straight slot conductor portions 4, 5 connected to both ends of the base end side coil end 1, and the end portions of the slot conductor portions 4, 5, as in the prior art. It has a coil end (not shown) that is continuous and protrudes to the opposite side of the core 2.
[0044]
Reference numeral 1 denotes a base end side coil end 1 of the pine needle conductor, 1 denotes a stator core, and 3 denotes a slot. The proximal end coil end 1 of the pine needle-like conductor extends from the radially inner side (of the stator core) of the C-shaped head 11 extending substantially in the radial direction and in the axial direction to one side in the circumferential direction. It consists of a first leg 12 and a second leg 13 extending from the radially outer side of the head 11 to the other circumferential side.
[0045]
This base end side coil end 1 is a circumferentially extending portion that extends to one side in the circumferential direction by bending a first leg 12 as shown in FIGS. 121 and an axially extending portion 122 extending in the axial direction from the distal end of the circumferentially extending portion 121 and continuing to the slot conductor portion 4. Similarly, the second leg portion 13 is bent and one side in the circumferential direction is provided. A circumferentially extending portion 131 extending in the axial direction and an axially extending portion 132 extending in the axial direction from the tip of the circumferentially extending portion 131 and continuing to the slot conductor portion 5 are provided. A pair of slots having different electrical angles π in the circumferential direction are individually housed in slot conductor housing positions different in the radial direction. Thereafter, as in the prior art, both ends of each end side coil end are joined in a predetermined order to form a stator coil.
[0046]
In FIG. 2, R is a radius of curvature of the outer peripheral edge 110 of the head 11 of the proximal end coil end 1, r is a radius of curvature of the inner peripheral edge 111 of the head 11 of the proximal end coil end 1, and W is the slot conductor portion 4. 5 is a radial gap between the slot conductors 4 and 5.
[0047]
In this embodiment, as shown in FIG. 2, an inner peripheral edge 11114 is recessed in the head 11 of the proximal end coil end 1 adjacent to the inner peripheral edge 111. The radius of curvature r of the inner peripheral edge 111 (inner peripheral curved portion 114) centered on the center of curvature m is set to be larger than the radial gap d between the pair of slot conductor portions 4 and 5.
[0048]
In this case, since the inner circumferential curved portion 114 is large, the radially inner portion 112 and the radially outer portion of the inner peripheral edge 111 of the pair of heads 11 adjacent to each other in the circumferential direction as described above with reference to FIG. The contact at the time of crossing with 113 can be prevented, and a partial short circuit of the coil can be prevented.
[0049]
In addition, the dashed-dotted line in FIG. 2 is for dividing the head part 11 of the base end side coil end 1, the leg parts 12 and 13, and the slot conductor parts 4 and 5. FIG.
[0050]
[Example 2]
The proximal end side coil end of the pine needle conductor sequential connection type stator coil of the second embodiment will be described with reference to FIG. The proximal end side coil end 1 of this embodiment is obtained by changing the shapes of the outer peripheral edge 110 and the inner peripheral edge 111 of the coil end 1 shown in FIGS.
[0051]
In the proximal end coil end 1 of this embodiment, the radial width is equal to or less than the sum of the width 2W of the slot conductor portions 4 and 5 and the radial gap d therebetween. Further, the inner surface 117 of the leg 12 of the base end side coil end 1 is provided on the same straight line as the inner surface 40 of the slot conductor 4 or on the outer side thereof. The outer surface 118 of the outer diameter 13 is provided on the same straight line as the outer surface 50 of the slot conductor portion 5 or on the outer diameter side.
[0052]
Further, the outer peripheral edge 110 of the head portion 11 of the proximal end coil end 1 is provided within the range of the radially inner surface 40 and the radially outer surface 50. Furthermore, the maximum axial width W1 of the head portion 11 is the slot. The conductor portions 4 and 5 are narrower than the radial width W.
[0053]
If it does in this way, while being able to prevent a coil short circuit by the inner periphery curved part 114, the increase in the coil end accommodation space of a rotary electric machine can be prevented, the physique increase of a rotary electric machine can be prevented, and a coil weight can also be reduced. it can.
[0054]
[Example 3]
The proximal end side coil end of the pine needle conductor sequential connection type stator coil of the third embodiment will be described with reference to FIG. The base end side coil end 1 of this embodiment is obtained by changing the shapes of the outer peripheral edge 110 and the inner peripheral edge 111 of the coil end 1 shown in FIG.
[0055]
In the proximal end coil end 1 of this embodiment, the radial width is equal to or less than the sum of the width 2W of the slot conductor portions 4 and 5 and the radial gap d therebetween. Further, the radially inner surface 117 of the leg portion 12 of the proximal end coil end 1 and the radially inner side portion 119 of the head portion 11 are provided on the same straight line as the radially inner surface 40 of the slot conductor portion 4 or on the radially outer side. The radially outer surface 118 of the leg portion 13 of the proximal end coil end 1 and the radially outer side portion 120 of the head portion 11 are provided on the same straight line as the radially outer surface 50 of the slot conductor portion 5 or on the radially outer side. It has been. Further, the outer peripheral edge 110 of the head portion 11 of the proximal end coil end 1 has a side portion 121 extending in the radial direction.
[0056]
That is, the base end side coil end 1 of this embodiment has a substantially chamfered quadrilateral shape when viewed in the circumferential direction, so that the radial width or axial length of the coil end accommodation space of the rotating electrical machine is not increased. Furthermore, the electrical resistance of the coil can be reduced without complicating the manufacturing process.
[0057]
Further, in this embodiment, the inner peripheral edge 111 of the base end side coil end 1 surrounding the inner peripheral curved portion 114 is also formed with an axially extending side portion 115 extending in the axial direction when viewed in the circumferential direction and a radial direction when viewed in the circumferential direction. And has a radially extending side portion 116 extending in the shape of a circle, and is formed in a substantially chamfered quadrangle as viewed in the circumferential direction. In this way, the above-mentioned coil short-circuit problem can be satisfactorily prevented while reducing the area of the inner circumferential curved portion 114.
[0058]
Furthermore, in this embodiment, since the maximum axial width W1 of the head 11 is narrower than the radial width W of the slot conductors 4 and 5, the rotation of the rotating electric machine is prevented while preventing an increase in the coil end accommodation space. An increase in the size of the electric machine can be prevented, and the coil weight can also be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of a pine needle-like conductor-joined coil of a rotating electrical machine according to a first embodiment.
2 is a plan view showing a proximal end side coil end of the pine needle conductor shown in FIG. 1; FIG.
3 is a plan view showing a base end side coil end of a pine needle conductor of Example 2. FIG.
4 is a plan view showing a proximal end side coil end of a pine needle conductor of Example 3. FIG.
FIG. 5 is a perspective view of a main part of a pine needle-like conductor-joined coil of a rotating electrical machine of a reference example.
6 is a plan view showing a proximal end side coil end of the pine needle conductor shown in FIG. 5; FIG.
7 is a front view showing a proximal end side coil end of the pine needle conductor shown in FIG. 6; FIG.
8 is a side view showing a proximal end coil end of the pine needle conductor shown in FIGS. 6 and 7. FIG.
FIG. 9 is an array diagram showing a state in which five pine needle conductors shown in FIGS. 5 to 8 are arrayed.
[Explanation of symbols]
1 is a coil end on the proximal side of a pine needle conductor, 2 is a stator core (core), 3 is a slot, 4 is a slot conductor, 5 is a head, 12 is a leg (first leg), 13 is Leg part (second leg part), 110 is the outer peripheral edge of the head 11, 111 is the inner peripheral edge of the proximal end coil end 1, 114 is the inner peripheral curved part of the proximal end coil end 1, and W is the slot conductor part 4, 5 is the radial width, W1 is the axial width of the head 11, 115 is the axial side of the inner peripheral curved portion 114, 116 is the radial side of the inner peripheral curved portion 114, and 117 to 120 are proximal ends. An axial side portion of the outer peripheral edge 110 of the side coil end 1, 121 is a radial side portion of the outer peripheral edge 110 of the proximal end coil end 1.

Claims (16)

円筒状のコアの一対のスロットの互いに異なる径方向位置に個別に収容される一対のスロット導体部、及び、前記両スロット導体部の基端から前記コアの軸方向一方側に突出するU字状の基端側コイルエンドを有し、平板打ち抜き加工によって周方向に薄く形成される断面板状の多数の松葉状導体を有し、
前記基端側コイルエンドは、略径方向及び略軸方向に延在する頭部、前記頭部の径内側から周方向一方側へ延在して前記両スロット導体部の一方に連なる第一の脚部、及び、前記頭部の径外側から周方向他方側へ延在して前記両スロット導体部の他方に連なる第二の脚部を有してなる回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、周方向にみた場合に、最小内周縁曲率半径rが前記一対のスロット導体部間の径方向ギャップ長dより大きい内周曲部を前記頭部の内周縁に接して有することを特徴とする回転電機の松葉状導体順次接合型コイル。
A pair of slot conductor portions individually accommodated in different radial positions of the pair of slots of the cylindrical core, and a U-shape projecting from the base ends of the two slot conductor portions to one axial side of the core the have a proximal side coil end has a cross-shaped plurality of pine needle-like conductor which is thin in the circumferential direction by flat stamping,
The proximal end coil end includes a head extending in a substantially radial direction and a substantially axial direction, a first extending from a radially inner side of the head to one side in the circumferential direction and continuing to one of the slot conductor portions. A pine needle-like conductor sequential joining type coil for a rotating electrical machine having a leg and a second leg extending from the outer diameter of the head to the other side in the circumferential direction and continuing to the other of the slot conductors In
When viewed in the circumferential direction, the proximal end coil end has an inner circumferential curved portion with a radius r of the smallest inner circumferential radius that is larger than the radial gap length d between the pair of slot conductor portions in contact with the inner circumferential edge of the head. A sequentially-connected coil of pine needle conductor of a rotating electrical machine.
請求項1記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、前記スロット導体部の径方向幅よりも製造公差を超えて異なる通電直角方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electrical machine according to claim 1,
The proximal end side coil end has a conduction perpendicular direction width that exceeds a manufacturing tolerance than a radial width of the slot conductor portion, and is a pine needle conductor sequential junction type coil for a rotating electrical machine.
請求項2記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、前記スロット導体部の径方向幅よりも製造公差を超えて狭い通電直角方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electric machine according to claim 2,
The said basal end side coil end has a conduction perpendicular direction width narrower than the radial width of the slot conductor portion, exceeding the manufacturing tolerance, and is a pine needle conductor sequential junction type coil for a rotating electrical machine.
請求項3記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、周方向にみた場合に前記スロット導体部の径方向幅よりも狭い軸方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electric machine according to claim 3,
The proximal end side coil end has an axial width that is narrower than a radial width of the slot conductor portion when viewed in the circumferential direction.
請求項3記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、周方向にみた場合に前記スロット導体部の径方向幅よりも狭い径方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electric machine according to claim 3,
The proximal end side coil end has a radial width narrower than a radial width of the slot conductor portion when viewed in the circumferential direction.
請求項2記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、前記スロット導体部の径方向幅よりも製造公差を超えて広い通電直角方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electric machine according to claim 2,
The said basal end side coil end has a current-carrying perpendicular width wider than manufacturing tolerance than the radial width of the said slot conductor part, The pine needle-like conductor sequential joining type coil of the rotary electric machine characterized by the above-mentioned.
請求項2乃至6のいずれか記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記内周曲部は、周方向にみた場合に略軸方向に延在する軸方向辺部、及び、周方向にみた場合に略径方向に延在する径方向辺部を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
The pine needle conductor sequential junction type coil of the rotating electrical machine according to any one of claims 2 to 6,
The inner circumferential curved portion includes an axial side portion extending in a substantially axial direction when viewed in the circumferential direction, and a radial side portion extending in a substantially radial direction when viewed in the circumferential direction. Sequentially joined coil of pine needle conductor of rotating electrical machine.
請求項2乃至7のいずれか記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドの外周縁は、周方向にみた場合に略軸方向に伸びる軸方向辺部、及び、周方向にみた場合に略径方向に伸びる径方向辺部を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
The pine needle conductor sequential junction type coil of the rotating electrical machine according to any one of claims 2 to 7,
An outer peripheral edge of the base end side coil end has an axial side portion extending in a substantially axial direction when viewed in the circumferential direction, and a radial side portion extending in a substantially radial direction when viewed in the circumferential direction. Sequentially joined coil of pine needle conductor of rotating electrical machine.
円筒状のコアの一対のスロットの互いに異なる径方向位置に個別に収容される一対のスロット導体部、及び、前記両スロット導体部の基端から前記コアの軸方向一方側に突出するU字状の基端側コイルエンドを有し、平板打ち抜き加工によって周方向に薄く形成される周方向に薄い断面板状の多数の松葉状導体を有し、
前記基端側コイルエンドは、略径方向及び略軸方向に延在する頭部、前記頭部の径内側から周方向一方側へ延在して前記両スロット導体部の一方に連なる第一の脚部、及び、前記頭部の径外側から周方向他方側へ延在して前記両スロット導体部の他方に連なる第二の脚部を有してなる回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、前記スロット導体部の径方向幅よりも製造公差を超えて異なる通電直角方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
A pair of slot conductor portions individually accommodated in different radial positions of the pair of slots of the cylindrical core, and a U-shape projecting from the base ends of the two slot conductor portions to one axial side of the core the have a proximal side coil end has a number of pine needle-like conductor of thin cross-section shaped in the circumferential direction is thin in the circumferential direction by flat stamping,
The proximal end coil end includes a head extending in a substantially radial direction and a substantially axial direction, a first extending from a radially inner side of the head to one side in the circumferential direction and continuing to one of the slot conductor portions. A pine needle-like conductor sequential joining type coil for a rotating electrical machine having a leg and a second leg extending from the outer diameter of the head to the other side in the circumferential direction and continuing to the other of the slot conductors In
The proximal end side coil end has a conduction perpendicular direction width that exceeds a manufacturing tolerance than a radial width of the slot conductor portion, and is a pine needle conductor sequential junction type coil for a rotating electrical machine.
請求項9記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、前記スロット導体部の径方向幅よりも製造公差を超えて狭い通電直角方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electrical machine according to claim 9,
The said basal end side coil end has a conduction perpendicular direction width narrower than the radial width of the slot conductor portion, exceeding the manufacturing tolerance, and is a pine needle conductor sequential junction type coil for a rotating electrical machine.
請求項10記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、周方向にみた場合に前記スロット導体部の径方向幅よりも狭い軸方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electrical machine according to claim 10,
The proximal end side coil end has an axial width that is narrower than a radial width of the slot conductor portion when viewed in the circumferential direction.
請求項10記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、周方向にみた場合に前記スロット導体部の径方向幅よりも狭い径方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electrical machine according to claim 10,
The proximal end side coil end has a radial width narrower than a radial width of the slot conductor portion when viewed in the circumferential direction.
請求項9記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドは、前記スロット導体部の径方向幅よりも製造公差を超えて広い通電直角方向幅を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
In the pine needle conductor sequential junction type coil of the rotating electrical machine according to claim 9,
The said basal end side coil end has a current-carrying perpendicular width wider than manufacturing tolerance than the radial width of the said slot conductor part, The pine needle-like conductor sequential joining type coil of the rotary electric machine characterized by the above-mentioned.
請求項9乃至13のいずれか記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記内周曲部は、周方向にみた場合に略軸方向に伸びる軸方向辺部、及び、周方向にみた場合に略径方向に伸びる径方向辺部を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
The pine needle conductor sequential junction type coil of the rotating electrical machine according to any one of claims 9 to 13,
The inner circumferential curved portion includes an axial side portion extending in a substantially axial direction when viewed in the circumferential direction, and a radial side portion extending in a substantially radial direction when viewed in the circumferential direction. A pine needle-like conductor sequentially joined type coil.
請求項9乃至14のいずれか記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドの外周縁は、周方向にみた場合に略軸方向に伸びる軸方向辺部、及び、周方向にみた場合に略径方向に伸びる径方向辺部を有することを特徴とする回転電機の松葉状導体順次接合型コイル。
The pine needle conductor sequential junction type coil of the rotating electrical machine according to any one of claims 9 to 14,
An outer peripheral edge of the base end side coil end has an axial side portion extending in a substantially axial direction when viewed in the circumferential direction, and a radial side portion extending in a substantially radial direction when viewed in the circumferential direction. Sequentially joined coil of pine needle conductor of rotating electrical machine.
請求項15記載の回転電機の松葉状導体順次接合型コイルにおいて、
前記基端側コイルエンドの外周縁をなす前記軸方向辺部は、前記スロット導体部の最外径縁及び最内径縁を略軸方向に延設した線上に設けられることを特徴とする回転電機の松葉状導体順次接合型コイル。
The pine needle conductor sequential junction type coil of the rotating electric machine according to claim 15,
The rotating electric machine characterized in that the axial side portion forming the outer peripheral edge of the base end side coil end is provided on a line extending substantially in the axial direction from an outermost diameter edge and an innermost diameter edge of the slot conductor portion. Pine needle-like conductor sequential joining type coil.
JP29496199A 1999-10-18 1999-10-18 Sequentially joined coil of pine needle conductor of rotating electric machine Expired - Fee Related JP4061788B2 (en)

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