JP2004208402A - Stator of rotating electric motor - Google Patents

Stator of rotating electric motor Download PDF

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Publication number
JP2004208402A
JP2004208402A JP2002374087A JP2002374087A JP2004208402A JP 2004208402 A JP2004208402 A JP 2004208402A JP 2002374087 A JP2002374087 A JP 2002374087A JP 2002374087 A JP2002374087 A JP 2002374087A JP 2004208402 A JP2004208402 A JP 2004208402A
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Japan
Prior art keywords
core
stator
outer peripheral
electric motor
electromagnetic steel
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JP2002374087A
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Japanese (ja)
Inventor
Munenori Tsukamoto
宗紀 塚本
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2002374087A priority Critical patent/JP2004208402A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator of a rotating electric motor capable of easily preventing the curling up or disjointing of a plurality of electromagnetic steel plates laminated to constitute a stator core. <P>SOLUTION: The stator of the rotating electric motor comprises holding pieces 31 and 32 that hold one end face and the other end face and make an outer frame member 13 abut with outer peripheral parts of end faces 11B and 11C of a teeth core 11 in the lamination direction of an electromagnetic steel plate 11a, and abut with outer peripheral parts of end faces 12B and 12C of a core back core 12 in the lamination direction of an electromagnetic steel plate 12a. It also comprises a plurality of connection pieces 33 to 33 that connect the end face holding pieces 31 and 32 to each other. A plurality of rod-like connection pieces 33 to 33 extending in the direction of a central axis line O are connected at circumferential positions at prescribed intervals, on the outer peripheral part of the facing surfaces, of the annular end face holding pieces 31 and 32. Each connection piece 33 is engaged with a recess 23 of the teeth core 11. Outer peripheral surfaces of the teeth core 11, the core back core 12, the end face holding pieces 31 and 32, and the connection piece 33 have similar outside diameters. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、電動機の固定子に関する。
【0002】
【従来の技術】
従来、例えば固定子鉄心を、ティース鉄心部とコアバック鉄心部とに分割して、ティース鉄心部間のスロット部に固定子巻線を巻装した後、ティース鉄心部間にコアバック鉄心部を径方向の外側から押圧挿入してなる固定子が知られている(例えば、特許文献1参照)。
この固定子では、渦電流損を低減させるために、ティース鉄心部およびコアバック鉄心部は、固定子の回転軸方向に複数の電磁鋼板が積層されて構成されている。
【0003】
【特許文献1】
特開平4−236149号公報
【0004】
【発明が解決しようとする課題】
ところで、上記従来技術の一例に係る固定子においては、例えば固定子を適宜の装置に搭載する際に、固定子の外周面を覆うホルダ内に電磁鋼板の積層方向に沿って固定子を圧入する場合等において、積層された複数の電磁鋼板が捲れてしまったり、ばらけてしまうことを防止することが望まれている。
本発明は上記事情に鑑みてなされたもので、固定子鉄心を構成する積層された複数の電磁鋼板が捲れてしまったり、ばらけてしまうことを容易に防止することが可能な電動機の固定子を提供することを目的とする。
【0005】
【課題を解決するための手段】
上記課題を解決して係る目的を達成するために、請求項1に記載の発明の電動機の固定子は、所定円周上に配置された複数のティース鉄心(例えば、後述する実施の形態でのティース鉄心11)と、隣り合う前記ティース鉄心間に外周側から挿入された固定子巻線(例えば、後述する実施の形態での線材C)と、隣り合う前記ティース鉄心間で前記固定子巻線の外周側に設けられたコアバック鉄心(例えば、後述する実施の形態でのコアバック鉄心12)とを備えた固定子であって、前記ティース鉄心および前記コアバック鉄心からなる固定子鉄心は複数の電磁鋼板(例えば、後述する実施の形態での電磁鋼板11a,12a)が積層されてなり、前記電磁鋼板の積層方向における前記固定子鉄心の一方および他方の各端面(例えば、後述する実施の形態での一方および他方の各端面11B,11Cおよび各端面12B,12C)の外周部に当接する一方および他方の端面抑え片(例えば、後述する実施の形態での一方および他方の端面抑え片31,32)と、前記一方および他方の端面抑え片に接続され、前記固定子鉄心の外周部によって固定される連結片(例えば、後述する実施の形態での連結片33)とからなる外枠部材(例えば、後述する実施の形態での外枠部材13)を備えたことを特徴としている。
【0006】
上記構成の電動機の固定子によれば、複数の電磁鋼板が積層されてなる固定子鉄心に対して、電磁鋼板の積層方向における固定子鉄心の各端面を両側から挟み込むようにして外枠部材が設けられていることから、例えば、電磁鋼板の積層方向に外力が作用する場合等であっても、積層された電磁鋼板が捲れてしまったり、ばらけてしまうことを確実に防止することができる。
【0007】
また、請求項2に記載の発明の電動機の固定子は、所定円周上に配置された複数のティース鉄心(例えば、後述する実施の形態でのティース鉄心11)と、隣り合う前記ティース鉄心間に外周側から挿入された固定子巻線(例えば、後述する実施の形態での線材C)と、隣り合う前記ティース鉄心間で前記固定子巻線の外周側に設けられたコアバック鉄心(例えば、後述する実施の形態でのコアバック鉄心12)とを備えた固定子であって、前記ティース鉄心および前記コアバック鉄心からなる固定子鉄心は複数の電磁鋼板(例えば、後述する実施の形態での電磁鋼板11a,12a)が積層されてなり、前記ティース鉄心の外周面上には前記電磁鋼板の積層方向に沿って伸びる溝部(例えば、後述する実施の形態での凹部23)が形成され、前記電磁鋼板の積層方向における前記固定子鉄心の一方および他方の各端面(例えば、後述する実施の形態での一方および他方の各端面11B,11Cおよび各端面12B,12C)の外周部に当接する一方および他方の端面抑え片(例えば、後述する実施の形態での一方および他方の端面抑え片31,32)と、前記一方および他方の端面抑え片を連結する連結片(例えば、後述する実施の形態での連結片33)とからなり、前記固定子鉄心の周方向から見た形状が略コの字形状に形成された外枠部材(例えば、後述する実施の形態での外枠部材13)を備え、前記連結片が前記溝部に係合されてなることを特徴としている。
【0008】
上記構成の電動機の固定子によれば、複数の電磁鋼板が積層されてなる固定子鉄心に対して、電磁鋼板の積層方向における固定子鉄心の各端面を両側から挟み込むようにして外枠部材が設けられていることから、例えば、電磁鋼板の積層方向に外力が作用する場合等であっても、積層された電磁鋼板が捲れてしまったり、ばらけてしまうことを確実に防止することができる。
しかも、外枠部材の連結片がティース鉄心の溝部に係合されることで、例えば外枠部材が径方向の外側に向かいティース鉄心の外周面上から突出することを防止することができ、外枠部材を設けることによって固定子の外径寸法が増大してしまうことを防止することができる。
【0009】
さらに、請求項3に記載の発明の電動機の固定子では、前記外枠部材の前記連結片は、前記電磁鋼板の積層方向の中途位置で分割および結合可能な結合部(例えば、後述する実施の形態での結合凸部33−1a、結合凹部33−2b)を備えたことを特徴としている。
【0010】
上記構成の電動機の固定子によれば、ティース鉄心およびコアバック鉄心からなる固定子鉄心に外枠部材を容易に装着することができる。
【0011】
さらに、請求項4に記載の発明の電動機の固定子では、前記外枠部材の前記端面抑え片は、前記固定子鉄心の周方向に分割および結合可能な結合部(例えば、後述する実施の形態での結合凸部31−ka、結合凹部31−(k+1)b)を備えたことを特徴としている。
【0012】
上記構成の電動機の固定子によれば、ティース鉄心およびコアバック鉄心からなる固定子鉄心に外枠部材を容易に装着することができる。
【0013】
さらに、請求項5に記載の発明の電動機の固定子では、前記外枠部材の前記端面抑え片は、前記ティース鉄心の端面に当接し、径方向内方に突出する突出部(例えば、後述する実施の形態での各抑え片突出部41,42)を備えたことを特徴としている。
【0014】
上記構成の電動機の固定子によれば、例えば、ティース鉄心と共に突出部に固定子巻線を巻き付けるように設定し、この突出部の表面上に絶縁塗料が塗布されてなる絶縁皮膜を設け、さらに、絶縁被膜の表面上に放熱材を塗布することによって、固定子の放熱性、特に固定子巻線での発熱に対する放熱性を向上させることができる。
【0015】
【発明の実施の形態】
以下、本発明の電動機の固定子の一実施形態について添付図面を参照しながら説明する。
本実施の形態による電動機の固定子10は、例えば図1から図3に示すように、略円筒状に形成され、所定円周上に所定間隔をおいて配置された複数のティース鉄心11,…,11と、隣り合うティース鉄心11,…,11間に配置されたコアバック鉄心12,…,12と、外枠部材13とを備えて構成され、例えば固定子10の外周面10Aの外径に対して所定の締め代を有する内径の内周面15Aを有するホルダ15内に圧入され、締まりばめされた状態で固定子10の外周面10Aがホルダ15の内周面15Aにより覆われるようになっている。
【0016】
ティース鉄心11およびコアバック鉄心12は、例えば図4に示すように、周方向に所定幅を有する複数の珪素鋼板等の各電磁鋼板11a,12aが固定子10の中心軸線O方向に積層され、略直方体状に形成されている。
ティース鉄心11は、例えば内周部とされる線材渡部21と、外周部とされる継鉄部22とを備えて構成され、適宜の巻線機(図示略)から供給される線材Cが各ティース鉄心11,…,11の線材渡部21,…,21間を縫うようにして巻き付けられている。
【0017】
コアバック鉄心12は、例えばティース鉄心11の線材渡部21に線材が巻き付けられた状態で、隣り合うティース鉄心11,11間に外周側から圧入され、隣り合うティース鉄心11,11の継鉄部22,21によって両側から挟み込まれるようにして固定されている。
ここで、ティース鉄心11,11の継鉄部22と、コアバック鉄心12とは、固定子10の径方向での長さが同等となるように形成され、隣り合うティース鉄心11,11間にコアバック鉄心12が圧入された状態で、ティース鉄心11の外周面11A(つまり、継鉄部22の外周面)とコアバック鉄心12の外周面12Aとは滑らかに連なり、同等の外径の外周面をなすようにされている。
そして、ティース鉄心11の外周面11A上には、例えば図4に示すように、電磁鋼板11aの積層方向つまり固定子10の中心軸線O方向に伸びる凹部23が設けられている。
【0018】
外枠部材13は、例えば図2および図4および図5(a),(b)に示すように、電磁鋼板11aの積層方向におけるティース鉄心11の一方および他方の各端面11B,11Cの外周部と電磁鋼板12aの積層方向におけるコアバック鉄心12の一方および他方の各端面12B,12Cの外周部とに当接する一方および他方の端面抑え片31,32と、一方および他方の端面抑え片31,32を連結する複数の連結片33,…,33とを備えて構成されている。
例えば、一方および他方の端面抑え片31,32は円環板状に形成され、各端面抑え片31,32の中心軸線が固定子10の中心軸線Oと同軸になるように配置されている。そして、各端面抑え片31,32の互いの対向面31A,32Aの外周部には、周方向に所定間隔をおいた位置で中心軸線O方向に伸びる略棒状の複数の連結片33,…,33が接続され、これらの連結片33,…,33によって各端面抑え片31a,31bの互いの対向面31A,32Aが連結されている。
【0019】
ここで、各端面抑え片31,32の外周面31B,32Bと、連結片33の外周面33Aとは滑らかに連なり、同等の外径の外周面をなすようにされている。さらに、連結片33はティース鉄心11の凹部23に係合され、ティース鉄心11の外周面11A(つまり、継鉄部22の外周面)と、連結片33の外周面33Aとは滑らかに連なり、同等の外径の外周面をなすようにされている。
すなわち、ティース鉄心11の一方および他方の各端面11B,11Cと、コアバック鉄心12の一方および他方の各端面12B,12Cとに、各端面抑え片31,32の互いの対向面31A,32Aが面接触し、各端面抑え片31,32を連結する連結片33がティース鉄心11の凹部23に係合する状態で、ティース鉄心11の外周面11Aおよびコアバック鉄心12の外周面12Aおよび各端面抑え片31,32の外周面31B,32Bおよび連結片33の外周面33Aは、同等の外径を有する外周面を形成している。
【0020】
なお、固定子10の径方向において、例えば、連結片33の長さは、各端面抑え片31,32の長さよりも短く形成されており、各端面抑え片31,32の内周部は、連結片33の内周面33Bよりも径方向内方に向かい突出するように形成されている。このため、例えば図5(b)に示すように、外枠部材13はティース鉄心11の周方向から見た形状が略コの字形状に形成されている。
そして、例えば図6に示すように、固定子10の径方向において、各端面抑え片31,32の長さは、ティース鉄心11,11の継鉄部22およびコアバック鉄心12の長さよりも短く形成されている。
【0021】
上述したように、本実施の形態による電動機の固定子10によれば、複数の各電磁鋼板11a,12aが積層されてなるティース鉄心11およびコアバック鉄心12に対して、各電磁鋼板11a,12aの積層方向における各端面11B,11Cおよび各端面12B,12Cを両側から挟み込むようにして外枠部材13が設けられていることから、例えば固定子10の外周面を覆うホルダ15内に電磁鋼板11a,12aの積層方向に沿って固定子10を圧入する場合等であっても、積層された各電磁鋼板11a,12aが捲れてしまったり、ばらけてしまうことを防止することができる。
しかも、外枠部材13の連結片33がティース鉄心11の凹部23に係合することで、ティース鉄心11およびコアバック鉄心12からなる固定子鉄心の外径寸法と、この固定子鉄心に外枠部材13を装着してなる固定子10の外径寸法とが同等になるように設定され、固定子10の外径寸法が増大してしまうことを防止することができる。
【0022】
なお、上述した本実施の形態において、外枠部材13は、例えばかしめ処理等によってティース鉄心11およびコアバック鉄心12に固定されてもよいし、例えば成形加工等によって形成されてもよい。
【0023】
なお、上述した本実施の形態において、外枠部材13は表面上に絶縁塗料を塗布してなる絶縁層を備えてもよいし、あるいは、電気的絶縁体により形成されてもよい。
【0024】
なお、上述した本実施の形態においては、一方および他方の端面抑え片31,32を円環板状に形成し、固定子10の径方向における各端面抑え片31,32の長さを、ティース鉄心11の継鉄部22およびコアバック鉄心12の長さよりも短く形成したが、これに限定されず、例えば図7に示す本実施形態の第1変形例に係る電動機の固定子10の外枠部材13のように、円環板状の一方および他方の端面抑え片31,32に、ティース鉄心11の一方および他方の各端面11B,11Cに当接し、径方向内方に向かい突出する各抑え片突出部41,42を設けてもよい。
この第1変形例に係る電動機の固定子10において、固定子10の径方向における各抑え片突出部41,42の長さは、各抑え片突出部41,42の内周部がティース鉄心11の線材渡部21に到達するように形成され、線材渡部21および各抑え片突出部41,42に線材Cが巻き付けられるようになっている。
そして、外枠部材13の表面上には、例えば、絶縁塗料が塗布されてなる絶縁皮膜が設けられ、さらに、絶縁被膜の表面上には放熱材が塗布されている。これにより、固定子10の放熱性、特に線材Cでの発熱に対して放熱性を向上させることができる。
【0025】
なお、上述した本実施の形態においては、例えば図8に示す本実施形態の第2変形例に係る電動機の固定子10の外枠部材13や、例えば図9に示す本実施形態の第3変形例に係る電動機の固定子10の外枠部材13のように、円環板状の一方および他方の端面抑え片31,32を、周方向に分割してなる複数の分割部31−1,…,31−nおよび32−1,…,32−n(nは任意の自然数)により構成してもよい。
これらの第2,第3変形例においては、例えば隣り合う分割部31−k,31−(k+1);(ただし、1≦k≦n―1)において、一方の分割部31−kの周方向の端面31−kA上に結合凸部31−kaが形成され、他方の分割部31−(k+1)の周方向の端面31−(k+1)B上に結合凹部31−(k+1)bが形成され、結合凸部31−kaが結合凹部31−(k+1)bに嵌合されることで、一方の分割部31−kと他方の分割部31−(k+1)とが連結される。
【0026】
また、上述した本実施の形態においては、例えば図10に示す本実施形態の第4変形例に係る電動機の固定子10の外枠部材13のように、連結片33を中心軸線O方向に分割可能としてもよい。
この第4変形例においては、例えば連結片33が2つに分割されてなる一方の分割連結片33−1の中心軸線O方向の端面33−1A上に結合凸部33−1aが形成され、他方の分割連結片33−2の中心軸線O方向の端面33−2B上に結合凹部33−2bが形成され、結合凸部33−1aが結合凹部33−2bに嵌合されることで、一方の分割連結片33−1と他方の分割連結片33−2とが連結される。
【0027】
【発明の効果】
以上説明したように、発明の電動機の固定子によれば、電磁鋼板の積層方向に外力が作用する場合等であっても、積層された電磁鋼板が捲れてしまったり、ばらけてしまうことを確実に防止することができる。
さらに、請求項2に記載の発明の電動機の固定子によれば、外枠部材が径方向の外側に向かいティース鉄心の外周面上から突出することを防止することができ、外枠部材を設けることによって固定子の外径寸法が増大してしまうことを防止することができる。
さらに、請求項3または請求項4に記載の発明の電動機の固定子によれば、ティース鉄心およびコアバック鉄心からなる固定子鉄心に外枠部材を容易に装着することができる。
さらに、請求項5に記載の発明の電動機の固定子によれば、例えば、ティース鉄心と共に突出部に固定子巻線を巻き付けるように設定し、この突出部の表面上に絶縁塗料が塗布されてなる絶縁皮膜を設け、さらに、絶縁被膜の表面上に放熱材を塗布することによって、固定子の放熱性、特に固定子巻線での発熱に対する放熱性を向上させることができる。
【図面の簡単な説明】
【図1】本発明の一実施形態に係る電動機の固定子の斜視図である。
【図2】図1に示す電動機の固定子の外枠部材の斜視図である。
【図3】図1に示す電動機の固定子のティース鉄心およびコアバック鉄心の斜視図である。
【図4】図1に示す電動機の固定子において、ティース鉄心およびコアバック鉄心と、外枠部材とを分解して示す分解斜視図である。
【図5】図5(a)は図1に示す電動機の固定子の周方向に直交し、ティース鉄心の外周面を含む断面図であり、図5(b)は図1に示す電動機の固定子の周方向に直交し、ティース鉄心の凹部を含む断面図である。
【図6】図1に示す電動機の固定子を中心軸線O方向から見た要部平面図である。
【図7】本実施形態の第1変形例に係る電動機の固定子を中心軸線O方向から見た要部平面図である。
【図8】本実施形態の第2変形例に係る電動機の固定子を中心軸線O方向から見た平面図である。
【図9】本実施形態の第3変形例に係る電動機の固定子を中心軸線O方向から見た平面図である。
【図10】本実施形態の第4変形例に係る電動機の固定子の要部を径方向の外周側から内周側に向かい見た図である。
【符号の説明】
10 固定子
11 ティース鉄心
11a 電磁鋼板
11B,11C 端面
12 コアバック鉄心
12a 電磁鋼板
12B,12C 端面
13 外枠部材
23 凹部(溝部)
31 端面抑え片
32 端面抑え片
33−1a 結合凸部(結合部)
33−2b 結合凹部(結合部)
41、42 抑え片突出部(突出部)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stator for an electric motor.
[0002]
[Prior art]
Conventionally, for example, a stator core is divided into a tooth core portion and a core back core portion, and a stator winding is wound around a slot portion between the tooth core portions, and then a core back core portion is inserted between the tooth core portions. 2. Description of the Related Art There is known a stator that is pressed and inserted from the outside in the radial direction (for example, see Patent Document 1).
In this stator, in order to reduce eddy current loss, the teeth core portion and the core back core portion are configured by laminating a plurality of electromagnetic steel plates in the rotation axis direction of the stator.
[0003]
[Patent Document 1]
JP-A-4-236149
[Problems to be solved by the invention]
By the way, in the stator according to an example of the above-described conventional technology, for example, when the stator is mounted on an appropriate device, the stator is pressed into the holder covering the outer peripheral surface of the stator along the lamination direction of the electromagnetic steel sheets. In some cases, it is desired to prevent a plurality of laminated electromagnetic steel sheets from being rolled up or separated.
The present invention has been made in view of the above circumstances, and a stator of an electric motor capable of easily preventing a plurality of laminated electromagnetic steel sheets constituting a stator core from being rolled up or separated. The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems and achieve the above object, a stator for an electric motor according to the first aspect of the present invention includes a plurality of teeth cores arranged on a predetermined circumference (for example, in an embodiment described later). A stator winding (for example, a wire C in an embodiment to be described later) inserted between the adjacent tooth cores from the outer periphery side, and the stator winding between the adjacent tooth cores. And a core back core (e.g., a core back core 12 in an embodiment to be described later) provided on the outer peripheral side of the stator. The stator core including the teeth core and the core back core has a plurality of stator cores. (For example, the electromagnetic steel sheets 11a and 12a in the embodiments described later) are laminated, and one and the other end faces of the stator core in the laminating direction of the electromagnetic steel sheets (for example, described later). One and other end face holding pieces (for example, one and other end face holding pieces in an embodiment to be described later) that contact the outer peripheral portions of the one and other end faces 11B and 11C and the end faces 12B and 12C in the embodiment. Pieces 31 and 32) and a connecting piece (for example, a connecting piece 33 in an embodiment to be described later) connected to the one and the other end face holding pieces and fixed by an outer peripheral portion of the stator core. It is characterized by including a frame member (for example, an outer frame member 13 in an embodiment described later).
[0006]
According to the stator of the electric motor having the above configuration, the outer frame member is arranged such that each end face of the stator core in the lamination direction of the electromagnetic steel sheets is sandwiched from both sides with respect to the stator core formed by laminating a plurality of electromagnetic steel sheets. Since it is provided, for example, even when an external force acts in the laminating direction of the electromagnetic steel sheets, the laminated electromagnetic steel sheets can be reliably prevented from being turned up or dislodged. .
[0007]
Further, the stator for the electric motor according to the second aspect of the present invention is configured such that a plurality of tooth cores (for example, a tooth core 11 in an embodiment described later) arranged on a predetermined circumference and a space between the adjacent tooth cores are provided. (For example, a wire C in an embodiment to be described later) inserted from the outer peripheral side of the stator core, and a core back core (for example, a wire core) provided on the outer peripheral side of the stator winding between the adjacent tooth cores. , A stator core comprising the teeth core and the core back core is provided with a plurality of electromagnetic steel plates (for example, in the embodiments described later). The electromagnetic steel sheets 11a, 12a) are laminated, and a groove (for example, a concave portion 23 in an embodiment described later) extending along the lamination direction of the electromagnetic steel sheets is formed on the outer peripheral surface of the tooth core. One end and the other end face of the stator core in the laminating direction of the electromagnetic steel sheets (for example, one and the other end faces 11B and 11C and the end faces 12B and 12C in the embodiment described later) are in contact with the outer peripheral portion. One and the other end face holding pieces (for example, one and the other end face holding pieces 31 and 32 in an embodiment described later) and a connecting piece for connecting the one and the other end face holding pieces (for example, an embodiment to be described later) An outer frame member (for example, an outer frame member 13 in an embodiment to be described later) formed of a connection piece 33) in a form and having a substantially U-shape when viewed from the circumferential direction of the stator core. And the connecting piece is engaged with the groove.
[0008]
According to the stator of the electric motor having the above configuration, the outer frame member is arranged such that each end face of the stator core in the lamination direction of the electromagnetic steel sheets is sandwiched from both sides with respect to the stator core formed by laminating a plurality of electromagnetic steel sheets. Since it is provided, for example, even when an external force acts in the laminating direction of the electromagnetic steel sheets, the laminated electromagnetic steel sheets can be reliably prevented from being turned up or dislodged. .
Moreover, since the connecting piece of the outer frame member is engaged with the groove of the tooth core, it is possible to prevent the outer frame member from protruding radially outward from the outer peripheral surface of the tooth core, for example. By providing the frame member, it is possible to prevent the outer diameter of the stator from increasing.
[0009]
Furthermore, in the stator for the electric motor according to the third aspect of the present invention, the connecting piece of the outer frame member is capable of being split and connected at an intermediate position in the laminating direction of the electromagnetic steel sheets (for example, an embodiment described below). It is characterized by having a coupling convex portion 33-1a and a coupling concave portion 33-2b) in the form.
[0010]
According to the stator of the electric motor having the above configuration, the outer frame member can be easily mounted on the stator core including the tooth core and the core back core.
[0011]
Furthermore, in the stator for the electric motor according to the fourth aspect of the present invention, the end face holding piece of the outer frame member is provided with a connecting part (for example, an embodiment described later) that can be divided and connected in the circumferential direction of the stator core. , And a coupling concave portion 31- (k + 1) b).
[0012]
According to the stator of the electric motor having the above configuration, the outer frame member can be easily mounted on the stator core including the tooth core and the core back core.
[0013]
Furthermore, in the stator for the electric motor according to the fifth aspect of the present invention, the end surface suppressing piece of the outer frame member abuts on the end surface of the tooth core and protrudes radially inward (for example, as described later). The present invention is characterized in that each holding piece projection 41, 42) in the embodiment is provided.
[0014]
According to the stator of the electric motor having the above configuration, for example, the stator winding is set around the protruding portion together with the tooth core, and an insulating coating formed by applying an insulating paint on the surface of the protruding portion is provided. By applying a heat dissipating material on the surface of the insulating film, the heat dissipating property of the stator, particularly, the heat dissipating property for heat generated by the stator windings can be improved.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a motor stator according to the present invention will be described with reference to the accompanying drawings.
The stator 10 of the electric motor according to the present embodiment is formed in a substantially cylindrical shape as shown in FIGS. 1 to 3, for example, and includes a plurality of tooth cores 11, which are arranged at predetermined intervals on a predetermined circumference. , 11, a core-back core 12,..., 12 disposed between adjacent tooth cores 11,..., And an outer frame member 13. For example, the outer diameter of an outer peripheral surface 10A of the stator 10 is provided. Is press-fitted into a holder 15 having an inner peripheral surface 15A having an inner diameter with a predetermined interference so that the outer peripheral surface 10A of the stator 10 is covered with the inner peripheral surface 15A of the holder 15 in a tightly fitted state. It has become.
[0016]
As shown in FIG. 4, for example, the tooth core 11 and the core back core 12 are formed by laminating a plurality of electromagnetic steel plates 11 a and 12 a such as a plurality of silicon steel plates having a predetermined width in a circumferential direction in a direction of a center axis O of the stator 10. It is formed in a substantially rectangular parallelepiped shape.
The tooth core 11 includes, for example, a wire passing portion 21 serving as an inner peripheral portion and a yoke portion 22 serving as an outer peripheral portion, and a wire C supplied from an appropriate winding machine (not shown) is provided. The teeth cores 11,..., 11 are wound so as to sew between the wire passing portions 21,.
[0017]
The core back core 12 is press-fitted from the outer peripheral side between the adjacent tooth cores 11, for example, in a state in which the wire is wound around the wire transition portion 21 of the tooth core 11, and the yoke part 22 of the adjacent tooth cores 11, 11. , 21 so as to be sandwiched from both sides.
Here, the yoke portion 22 of the tooth cores 11, 11 and the core back core 12 are formed such that the lengths in the radial direction of the stator 10 are equal, and between the adjacent tooth cores 11, 11. In a state where the core back iron core 12 is press-fitted, the outer peripheral surface 11A of the tooth core 11 (that is, the outer peripheral surface of the yoke portion 22) and the outer peripheral surface 12A of the core back iron core 12 are smoothly connected to each other, and have the same outer diameter. It is made to make a plane.
On the outer peripheral surface 11A of the tooth core 11, for example, as shown in FIG. 4, a concave portion 23 extending in the laminating direction of the electromagnetic steel sheets 11a, that is, in the direction of the center axis O of the stator 10 is provided.
[0018]
As shown in FIGS. 2 and 4 and FIGS. 5 (a) and 5 (b), the outer frame member 13 has an outer peripheral portion of one and the other end faces 11B and 11C of the tooth core 11 in the laminating direction of the electromagnetic steel sheets 11a. And the other end face holding pieces 31 and 32 that abut against the outer peripheral portions of the one and the other end faces 12B and 12C of the core back iron core 12 in the stacking direction of the magnetic steel sheet 12a and the one and the other end face holding pieces 31 and 32, respectively. , And 33, which are connected to each other.
For example, the one and the other end face holding pieces 31 and 32 are formed in a ring shape, and are arranged such that the center axis of each end face holding piece 31 and 32 is coaxial with the center axis O of the stator 10. On the outer peripheral portion of the opposing surfaces 31A, 32A of the end surface suppressing pieces 31, 32, a plurality of substantially rod-shaped connecting pieces 33,. 33 are connected to each other, and the opposing surfaces 31A, 32A of the end face suppressing pieces 31a, 31b are connected by these connecting pieces 33,.
[0019]
Here, the outer peripheral surfaces 31B and 32B of the end surface suppressing pieces 31 and 32 and the outer peripheral surface 33A of the connecting piece 33 are smoothly connected so as to form an outer peripheral surface having an equivalent outer diameter. Further, the connecting piece 33 is engaged with the concave portion 23 of the tooth core 11, and the outer peripheral surface 11 </ b> A of the tooth core 11 (that is, the outer peripheral surface of the yoke part 22) and the outer peripheral surface 33 </ b> A of the connecting piece 33 are smoothly connected, The outer peripheral surfaces have the same outer diameter.
That is, the opposing surfaces 31A and 32A of the end surface pressing pieces 31 and 32 are provided on one and the other end surfaces 11B and 11C of the tooth core 11 and on the one and the other end surfaces 12B and 12C of the core back core 12 respectively. The outer peripheral surface 11A of the tooth core 11 and the outer peripheral surface 12A of the core back iron core 12 and the respective end surfaces are brought into contact with each other in a state where the connecting pieces 33 that come into surface contact and connect the respective end face pressing pieces 31 and 32 are engaged with the concave portions 23 of the tooth core 11. The outer peripheral surfaces 31B, 32B of the holding pieces 31, 32 and the outer peripheral surface 33A of the connecting piece 33 form an outer peripheral surface having an equivalent outer diameter.
[0020]
In the radial direction of the stator 10, for example, the length of the connecting piece 33 is formed shorter than the length of each of the end face suppressing pieces 31 and 32. The connecting piece 33 is formed so as to protrude radially inward from the inner peripheral surface 33B of the connecting piece 33. For this reason, as shown in FIG. 5B, for example, the outer frame member 13 is formed in a substantially U-shape when viewed from the circumferential direction of the tooth core 11.
For example, as shown in FIG. 6, in the radial direction of the stator 10, the length of each end face holding piece 31, 32 is shorter than the length of the yoke portion 22 of the tooth cores 11, 11 and the core back iron core 12. Is formed.
[0021]
As described above, according to the stator 10 of the electric motor according to the present embodiment, each of the electromagnetic steel plates 11a, 12a is provided with respect to the tooth core 11 and the core back core 12 in which the plurality of magnetic steel plates 11a, 12a are laminated. Since the outer frame member 13 is provided so as to sandwich the end faces 11B and 11C and the end faces 12B and 12C from both sides in the stacking direction of the electromagnetic steel sheet 11a, for example, the electromagnetic steel sheet 11a is placed in the holder 15 that covers the outer peripheral face of the stator 10. Even when the stator 10 is press-fitted along the stacking direction of the electromagnetic steel plates 12a, 12a, it is possible to prevent the stacked electromagnetic steel plates 11a, 12a from being turned up or separated.
Moreover, since the connecting piece 33 of the outer frame member 13 is engaged with the concave portion 23 of the tooth core 11, the outer diameter of the stator core including the tooth core 11 and the core back core 12 and the outer frame The outer diameter of the stator 10 to which the member 13 is attached is set to be equal to the outer diameter of the stator 10, so that the outer diameter of the stator 10 can be prevented from increasing.
[0022]
In the above-described embodiment, the outer frame member 13 may be fixed to the tooth core 11 and the core back core 12 by, for example, caulking, or may be formed by, for example, molding.
[0023]
In the above-described embodiment, the outer frame member 13 may include an insulating layer formed by applying an insulating paint on the surface, or may be formed of an electrical insulator.
[0024]
In the present embodiment described above, the one and the other end face suppressing pieces 31 and 32 are formed in an annular plate shape, and the length of each end face suppressing piece 31 and 32 in the radial direction of the stator 10 is set to the teeth. Although formed to be shorter than the lengths of the yoke portion 22 and the core back core 12 of the iron core 11, the present invention is not limited to this. For example, the outer frame of the stator 10 of the electric motor according to the first modification of the present embodiment shown in FIG. Like the member 13, each of the annular plate-shaped end faces 31 and 32 comes into contact with one and the other end faces 11B and 11C of the tooth core 11 and projects inward in the radial direction. One-side protruding portions 41 and 42 may be provided.
In the stator 10 of the electric motor according to the first modification, the length of each of the retaining piece protrusions 41 and 42 in the radial direction of the stator 10 is such that the inner peripheral portion of each of the retaining piece protrusions 41 and 42 is the tooth core 11. The wire C is wound around the wire passing portion 21 and each of the holding piece protrusions 41 and 42.
Then, on the surface of the outer frame member 13, for example, an insulating coating formed by applying an insulating paint is provided, and on the surface of the insulating coating, a heat dissipation material is applied. Thereby, the heat radiation of the stator 10, particularly the heat radiation of the wire C, can be improved.
[0025]
In the above-described embodiment, for example, the outer frame member 13 of the stator 10 of the electric motor according to the second modification of the embodiment shown in FIG. 8 or the third modification of the embodiment shown in FIG. Like the outer frame member 13 of the stator 10 of the electric motor according to the example, a plurality of divided portions 31-1,... Formed by circumferentially dividing one and the other end face holding pieces 31, 32 of an annular plate shape. , 31-n and 32-1,..., 32-n (n is an arbitrary natural number).
In these second and third modifications, for example, in the adjacent divided portions 31-k, 31- (k + 1); (where 1 ≦ k ≦ n−1), the circumferential direction of one divided portion 31-k is used. Are formed on the end surface 31-kA of the other, and the connection concave portion 31- (k + 1) b is formed on the circumferential end surface 31- (k + 1) B of the other divided portion 31- (k + 1). By fitting the coupling convex portion 31-ka into the coupling concave portion 31- (k + 1) b, one divided portion 31-k and the other divided portion 31- (k + 1) are coupled.
[0026]
In the above-described embodiment, the connecting piece 33 is divided in the direction of the central axis O, for example, as in the outer frame member 13 of the stator 10 of the electric motor according to the fourth modification of the embodiment shown in FIG. It may be possible.
In the fourth modified example, for example, a coupling projection 33-1a is formed on an end surface 33-1A in the direction of the central axis O of one of the divided coupling pieces 33-1 in which the coupling piece 33 is divided into two, A coupling concave portion 33-2b is formed on an end surface 33-2B of the other split coupling piece 33-2 in the direction of the central axis O, and the coupling convex portion 33-1a is fitted into the coupling concave portion 33-2b. Is connected to the other divided connecting piece 33-2.
[0027]
【The invention's effect】
As described above, according to the stator of the electric motor of the present invention, even when external force acts in the lamination direction of the electromagnetic steel sheets, the laminated electromagnetic steel sheets may be turned up or dislodged. It can be reliably prevented.
Furthermore, according to the stator for the electric motor according to the second aspect of the present invention, the outer frame member can be prevented from protruding radially outward from the outer peripheral surface of the tooth core, and the outer frame member is provided. This can prevent the outer diameter of the stator from increasing.
Further, according to the stator for the electric motor according to the third or fourth aspect of the present invention, the outer frame member can be easily mounted on the stator core including the teeth core and the core back core.
Further, according to the stator for the electric motor according to the fifth aspect of the present invention, for example, the stator winding is set around the protruding portion together with the teeth core, and the insulating paint is applied on the surface of the protruding portion. By providing such an insulating film and further applying a heat radiating material on the surface of the insulating film, it is possible to improve the heat radiation of the stator, especially the heat radiation with respect to the heat generated by the stator windings.
[Brief description of the drawings]
FIG. 1 is a perspective view of a stator of an electric motor according to an embodiment of the present invention.
FIG. 2 is a perspective view of an outer frame member of the stator of the electric motor shown in FIG.
FIG. 3 is a perspective view of a tooth core and a core back core of the stator of the electric motor shown in FIG. 1;
FIG. 4 is an exploded perspective view showing a tooth core, a core back core, and an outer frame member in the stator of the electric motor shown in FIG.
5 (a) is a sectional view orthogonal to the circumferential direction of the stator of the electric motor shown in FIG. 1 and including the outer peripheral surface of the teeth core, and FIG. 5 (b) is the fixing of the electric motor shown in FIG. 1; It is sectional drawing orthogonal to the circumferential direction of a child, and containing the recessed part of a teeth iron core.
FIG. 6 is a plan view of a main part of the stator of the electric motor shown in FIG. 1, as viewed from a direction of a center axis O.
FIG. 7 is a plan view of a main part of the stator of the electric motor according to a first modification of the present embodiment, as viewed from the center axis O direction.
FIG. 8 is a plan view of a stator of an electric motor according to a second modification of the present embodiment, as viewed from a direction of a center axis O.
FIG. 9 is a plan view of a stator of an electric motor according to a third modification of the present embodiment, as viewed from a center axis O direction.
FIG. 10 is a diagram of a main part of a stator of an electric motor according to a fourth modified example of the present embodiment viewed from an outer peripheral side toward an inner peripheral side in a radial direction.
[Explanation of symbols]
Reference Signs List 10 Stator 11 Teeth iron core 11a Electromagnetic steel sheets 11B, 11C End face 12 Core back iron core 12a Electromagnetic steel sheets 12B, 12C End face 13 Outer frame member 23 Recess (groove)
31 End face holding piece 32 End face holding piece 33-1a Joining convex part (joining part)
33-2b Coupling recess (coupling portion)
41, 42 Suppressing piece projection (projection)

Claims (5)

所定円周上に配置された複数のティース鉄心と、隣り合う前記ティース鉄心間に外周側から挿入された固定子巻線と、隣り合う前記ティース鉄心間で前記固定子巻線の外周側に設けられたコアバック鉄心とを備えた固定子であって、
前記ティース鉄心および前記コアバック鉄心からなる固定子鉄心は複数の電磁鋼板が積層されてなり、
前記電磁鋼板の積層方向における前記固定子鉄心の一方および他方の各端面の外周部に当接する一方および他方の端面抑え片と、前記一方および他方の端面抑え片に接続され、前記固定子鉄心の外周部によって固定される連結片とからなる外枠部材を備えたことを特徴とする電動機の固定子。
A plurality of tooth cores arranged on a predetermined circumference, a stator winding inserted from an outer peripheral side between adjacent tooth cores, and an outer peripheral side of the stator winding between adjacent tooth cores. A stator having a core back iron core provided,
The stator core including the teeth core and the core back core is formed by stacking a plurality of electromagnetic steel sheets,
One and the other end face retaining pieces that contact the outer peripheral portions of the one and the other end faces of the stator core in the lamination direction of the electromagnetic steel sheets, and are connected to the one and the other end face retaining pieces, and are connected to the stator cores. A stator for an electric motor, comprising: an outer frame member including a connection piece fixed by an outer peripheral portion.
所定円周上に配置された複数のティース鉄心と、隣り合う前記ティース鉄心間に外周側から挿入された固定子巻線と、隣り合う前記ティース鉄心間で前記固定子巻線の外周側に設けられたコアバック鉄心とを備えた固定子であって、
前記ティース鉄心および前記コアバック鉄心からなる固定子鉄心は複数の電磁鋼板が積層されてなり、前記ティース鉄心の外周面上には前記電磁鋼板の積層方向に沿って伸びる溝部が形成され、
前記電磁鋼板の積層方向における前記固定子鉄心の一方および他方の各端面の外周部に当接する一方および他方の端面抑え片と、前記一方および他方の端面抑え片を連結する連結片とからなり、前記固定子鉄心の周方向から見た形状が略コの字形状に形成された外枠部材を備え、
前記連結片が前記溝部に係合されてなることを特徴とする電動機の固定子。
A plurality of tooth cores arranged on a predetermined circumference, a stator winding inserted from an outer peripheral side between adjacent tooth cores, and an outer peripheral side of the stator winding between adjacent tooth cores. A stator having a core back iron core provided,
The stator core including the tooth core and the core back core is formed by laminating a plurality of electromagnetic steel sheets, and a groove extending along the lamination direction of the electromagnetic steel sheets is formed on an outer peripheral surface of the tooth core,
One and the other end face restraining pieces that contact the outer peripheral portions of the one and the other end faces of the stator core in the lamination direction of the electromagnetic steel sheets, and a connecting piece that connects the one and the other end face restraining pieces, An outer frame member formed in a substantially U-shape as viewed from the circumferential direction of the stator core,
A stator for an electric motor, wherein the connecting piece is engaged with the groove.
前記外枠部材の前記連結片は、前記電磁鋼板の積層方向の中途位置で分割および結合可能な結合部を備えたことを特徴とする請求項1または請求項2の何れかに記載の電動機の固定子。3. The electric motor according to claim 1, wherein the connection piece of the outer frame member includes a coupling portion that can be divided and coupled at an intermediate position in a stacking direction of the electromagnetic steel sheets. 4. stator. 前記外枠部材の前記端面抑え片は、前記固定子鉄心の周方向に分割および結合可能な結合部を備えたことを特徴とする請求項1または請求項2の何れかに記載の電動機の固定子。The fixing of the electric motor according to claim 1, wherein the end surface pressing piece of the outer frame member includes a coupling portion that can be divided and coupled in a circumferential direction of the stator core. 4. Child. 前記外枠部材の前記端面抑え片は、前記ティース鉄心の端面に当接し、径方向内方に突出する突出部を備えたことを特徴とする請求項1から請求項4の何れかに記載の電動機の固定子。The end face holding piece of the outer frame member is provided with a protruding portion that comes into contact with an end face of the teeth core and protrudes radially inward. Electric motor stator.
JP2002374087A 2002-12-25 2002-12-25 Stator of rotating electric motor Withdrawn JP2004208402A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007081062A1 (en) * 2006-01-16 2007-07-19 Toyota Jidosha Kabushiki Kaisha Rotary motor core, and rotary motor
WO2010109515A1 (en) * 2009-03-23 2010-09-30 株式会社ハーモニック・ドライブ・システムズ Segmented core motor stator
JP2015130796A (en) * 2015-03-02 2015-07-16 章 三好 Rotary electric apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007081062A1 (en) * 2006-01-16 2007-07-19 Toyota Jidosha Kabushiki Kaisha Rotary motor core, and rotary motor
KR100946906B1 (en) * 2006-01-16 2010-03-09 도요타지도샤가부시키가이샤 Rotary motor core, and rotary motor
US7714476B2 (en) 2006-01-16 2010-05-11 Toyota Jidosha Kabushiki Kaisha Rotating electrical machine core and rotating electrical machine
WO2010109515A1 (en) * 2009-03-23 2010-09-30 株式会社ハーモニック・ドライブ・システムズ Segmented core motor stator
JPWO2010109515A1 (en) * 2009-03-23 2012-09-20 株式会社ハーモニック・ドライブ・システムズ Split core motor stator
US8390166B2 (en) 2009-03-23 2013-03-05 Harmonic Drive Systems Inc. Segmented core motor stator
JP2015130796A (en) * 2015-03-02 2015-07-16 章 三好 Rotary electric apparatus

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