JP2013158159A - Rotary electric machine - Google Patents
Rotary electric machine Download PDFInfo
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- JP2013158159A JP2013158159A JP2012017476A JP2012017476A JP2013158159A JP 2013158159 A JP2013158159 A JP 2013158159A JP 2012017476 A JP2012017476 A JP 2012017476A JP 2012017476 A JP2012017476 A JP 2012017476A JP 2013158159 A JP2013158159 A JP 2013158159A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
Description
本発明は、積層分割コアを用いた回転電機に関するものである。 The present invention relates to a rotating electrical machine using a laminated core.
回転電機の固定子コアの中で、集中巻きの分割コアは、主に小型高出力を目的に技術開発が進められている。しかし、電気自動車などに使われる300kW程度の出力を得ようとすると、分割コアのステータの直径は250mm前後となる。分割されたコアを環状に組み立て、焼き嵌めリングを嵌めて分割コア組立を固定する。この焼き嵌めリングは、分割コアを環状に組み立てた分割コア組立の外周に焼き嵌め可能な径であり、その寸法精度は1/10〜1/100mmである必要がある。 Among the stator cores of rotating electrical machines, technical development is progressing mainly for the purpose of compact and high-power split cores with concentrated winding. However, when trying to obtain an output of about 300 kW used for an electric vehicle or the like, the diameter of the stator of the split core is about 250 mm. The divided cores are assembled into an annular shape, and a shrink fitting ring is fitted to fix the divided core assembly. This shrink fit ring has a diameter that can be shrink fit on the outer periphery of the split core assembly in which the split cores are assembled in an annular shape, and the dimensional accuracy thereof needs to be 1/10 to 1/100 mm.
この焼き嵌めは、回転電機の最大出力時に分割コア組立と焼き嵌めリングが滑らないような圧力で固定する必要がある。分割コア組立を安定して固定するためには、焼き嵌め締め代を大きく設定し、焼き嵌めリングの要求寸法の公差を緩和すればよい。 This shrink fitting needs to be fixed at such a pressure that the split core assembly and shrink fitting ring do not slip at the maximum output of the rotating electrical machine. In order to stably fix the split core assembly, it is only necessary to increase the shrinkage-tightening allowance and relax the tolerance of the required size of the shrink-fit ring.
しかし、焼き嵌め締め代を大きく設定すると、焼き嵌めリングで分割コアを固定する圧力が大きくなり、隣接する分割コア同士の接触部がコア積層方向に座屈し変形するおそれがあった。 However, when the shrink-fit tightening margin is set large, the pressure for fixing the split core with the shrink-fit ring increases, and there is a possibility that the contact portion between the adjacent split cores buckles in the core stacking direction and deforms.
このコアの変形の解決策として、コアバックの径方向外側における両端の点が、ステータコアの中心点と前記コアバックの径方向内側における両端の点とをそれぞれ結ぶ2つの直線に挟まれた範囲の内側又は外側になるように形成する技術がある(例えば特許文献1参照)。 As a solution to the deformation of the core, the points at both ends on the radially outer side of the core back are in a range sandwiched between two straight lines connecting the center point of the stator core and the points on both ends of the core back in the radial direction. There is a technique for forming the inner side or the outer side (see, for example, Patent Document 1).
一方、焼き嵌め締め代を小さくすると焼き嵌めリングで分割コア組立を固定する力が小さくなり、トルクの発生時に周方向に摺動、もしくは衝撃により軸方向に脱落するおそれがある。この脱落については、積層コアの薄板の打ち抜き方向を利用した技術がある(例えば特許文献2参照)。 On the other hand, if the shrinkage tightening allowance is reduced, the force for fixing the split core assembly by the shrinkage fitting ring is reduced, and there is a risk that the torque slides in the circumferential direction or falls off in the axial direction due to impact. For this drop-off, there is a technique using the punching direction of the thin plate of the laminated core (see, for example, Patent Document 2).
解決しようとする問題点は、焼き嵌めリングの要求寸法の公差を緩和したとき、焼き嵌めリングで分割コアを固定する圧力で、分割コアが変形しやすくなる点である。 The problem to be solved is that when the tolerance of the required size of the shrink-fit ring is relaxed, the split core is easily deformed by the pressure for fixing the split core with the shrink-fit ring.
上記課題を解決するため、例えば、薄板が積層され、ボビンが組み付けられ、ボビンにコイルが巻回されて構成された分割コアと、複数の分割コアを環状に組み立てて構成された分割コア組立と、分割コア組立の径方向外周に設けられた焼き嵌めリングとを備えるステータを有し、ボビンはボビン淵を有し、ボビン淵の径方向の幅は、分割コアの軸方向端面において、分割コアの円周方向端部に接触する部分の幅が、分割コア円周方向中央の部分の幅より大きくなるよう回転電機を構成すればよい。 In order to solve the above problems, for example, a split core configured by laminating thin plates, a bobbin assembled, and a coil wound around the bobbin, and a split core assembly configured by assembling a plurality of split cores in an annular shape And a stator having a shrink-fit ring provided on the outer periphery in the radial direction of the split core assembly, the bobbin has a bobbin rod, and the radial width of the bobbin rod is divided at the axial end face of the split core. What is necessary is just to comprise a rotary electric machine so that the width | variety of the part which contacts the circumferential direction edge part of this may become larger than the width | variety of the part of the center part of a division | segmentation core circumferential direction.
本発明によれば、焼き嵌めリングで分割コアを固定する圧力で、隣接する分割コアの接触部が積層方向に座屈し変形することを防止することができる。 According to the present invention, it is possible to prevent the contact portion between adjacent split cores from buckling and deforming in the stacking direction due to the pressure for fixing the split core with the shrink-fit ring.
以下、図面を用いて本発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.
なお、以下の説明では、筒型形状として説明するが、筒型形状に限らず、例えば多角形状や底のあるカップ形状であってもよい。また、以下で図示される積層数、分割コアの分割数は例示であり、図示されている積層数、分割数以外であってもよい。 In addition, in the following description, although demonstrated as a cylindrical shape, it is not restricted to a cylindrical shape, For example, a polygonal shape or a cup shape with a bottom may be sufficient. Further, the number of stacked layers and the number of divided cores illustrated below are examples, and may be other than the illustrated number of stacked layers and divided numbers.
〔実施例1〕
図1は回転電機に用いるステータコアの構成を説明するステータコアの分解図である。ステータコアは分割コア組立10と分割コア組立を保持する焼き嵌めリング20で構成されている。
[Example 1]
FIG. 1 is an exploded view of a stator core illustrating a configuration of a stator core used in a rotating electrical machine. The stator core includes a split core assembly 10 and a shrink-fit ring 20 that holds the split core assembly.
焼き嵌めリング20は、上記のように分割コア組立10を保持する機能を有し、焼き嵌めリング20の内側形状は、分割コア組立10の外周に沿った形状にすることができる。また、焼き嵌めリング20の内径及び肉厚は、分割コア組立10を焼き嵌め等により固定できるよう引張応力等を考慮して適宜設定することができる。焼き嵌めリング20の一方の端部にはフランジが設けられる。 The shrink-fit ring 20 has a function of holding the split core assembly 10 as described above, and the inner shape of the shrink-fit ring 20 can be a shape along the outer periphery of the split core assembly 10. Further, the inner diameter and the wall thickness of the shrink-fit ring 20 can be appropriately set in consideration of tensile stress and the like so that the split core assembly 10 can be fixed by shrink-fit or the like. A flange is provided at one end of the shrink-fit ring 20.
分割コア組立10は、複数の分割コア30で構成される。軸方向(回転電機の回転軸に沿う方向)に見たときの径方向外周形状は円形で、内周形状はステータの仕様に応じて設定された凹凸形状をしており、突起の数は分割コアの分割数に対応する。この突起はティース等とよばれ、ボビン40が組み付けられ、コイル(図示せず)が巻かれている。 The split core assembly 10 includes a plurality of split cores 30. When viewed in the axial direction (the direction along the rotating shaft of the rotating electrical machine), the outer circumferential shape in the radial direction is circular, the inner circumferential shape has an uneven shape set according to the stator specifications, and the number of protrusions is divided Corresponds to the number of core divisions. These protrusions are called teeth and the bobbin 40 is assembled and a coil (not shown) is wound.
図2は分割コア30を示している。分割コア30は、薄板を所定の形状で打ち抜いたもの(例えば珪素鋼板)を所定の寸法になるように軸方向に積層したもので、打ち抜きにはプレス加工を用いることができる。分割コア30は、ボビン40を組み付け、コイルを巻きつけることができる突起部であるティース32と、隣接する分割コアおよび焼き嵌めリング20と接触するコアバック31で構成することができる。 FIG. 2 shows the split core 30. The split core 30 is formed by punching a thin plate in a predetermined shape (for example, a silicon steel plate) in the axial direction so as to have a predetermined dimension, and press working can be used for punching. The split core 30 can be constituted by a tooth 32 that is a protrusion that can be assembled with the bobbin 40 and wound with a coil, and a core back 31 that contacts the adjacent split core and the shrink-fitting ring 20.
ボビン40は、コイル(図示せず)をティース32に巻いた際、コイルの巻き形状が変形しないように、分割コア30のコアバックの軸方向端面より、軸方向に突出することができる。このボビン40の突出部位はボビン淵41等と呼ばれる。 The bobbin 40 can protrude in the axial direction from the axial end surface of the core back of the split core 30 so that the winding shape of the coil is not deformed when a coil (not shown) is wound around the teeth 32. The protruding portion of the bobbin 40 is called a bobbin ridge 41 or the like.
ボビン淵41はコアバック31の軸方向端面に接触することができる。また、ボビン淵41はコアバック31の円周方向端部にも接触することができる。ここで、円周方向端部とは、コアバックの円周方向の幅に対して概ね1/4を示す。 The bobbin rod 41 can contact the axial end surface of the core back 31. Further, the bobbin rod 41 can also contact the circumferential end of the core back 31. Here, the circumferential direction end portion indicates approximately 1/4 with respect to the circumferential width of the core back.
このとき、ボビン淵41の径方向幅を、ボビン淵41の円周方向中央の径方向幅より、円周方向端部のボビン淵41の幅の方が大きくなるよう設定する。円周方向のボビン淵41の幅は、コアバック31の径方向幅の概ね1/5以上が望ましい。 At this time, the radial width of the bobbin rod 41 is set so that the width of the bobbin rod 41 at the circumferential end is larger than the radial width at the center in the circumferential direction of the bobbin rod 41. The width of the bobbin rod 41 in the circumferential direction is preferably approximately 1/5 or more of the radial width of the core back 31.
〔実施例2〕
図3は本発明の別の実施例を示している。本実施例で特に説明しない部分の構成は実施例1と共通である。
[Example 2]
FIG. 3 shows another embodiment of the present invention. Configurations of parts not specifically described in the present embodiment are the same as those in the first embodiment.
ボビン淵41がコアバック31の軸方向端面に接触し、コアバック31の円周方向端部に接触する部位の径方向の幅については、コアバック31の径方向の幅の概ね1/5以上が望ましい。 The radial width of the portion where the bobbin rod 41 contacts the axial end surface of the core back 31 and contacts the circumferential end of the core back 31 is approximately 1/5 or more of the radial width of the core back 31. Is desirable.
しかし、ボビン淵41の軸方向端部の幅は同様である必要はない。 However, the width of the end portion in the axial direction of the bobbin rod 41 need not be the same.
そこで本実施例では、ボビン淵41がコアバック31の端面に接触する部分から、ボビン淵41の軸方向端部に向かって、ボビン淵41の幅を小さくしている。ボビン淵41の幅を軸方向端部に向かって小さくする具体的形状としては、直線的(図3に示すような傾斜)でも、段階的(階段状)でも、両者の組み合せでもよい。 Therefore, in this embodiment, the width of the bobbin rod 41 is reduced from the portion where the bobbin rod 41 contacts the end surface of the core back 31 toward the axial end of the bobbin rod 41. The specific shape for reducing the width of the bobbin rod 41 toward the end in the axial direction may be linear (inclination as shown in FIG. 3), stepwise (stepwise), or a combination of both.
〔実施例3〕
図4は本発明の別の実施例を示している。本実施例で特に説明しない部分の構成は実施例1と共通である。
Example 3
FIG. 4 shows another embodiment of the present invention. Configurations of parts not specifically described in the present embodiment are the same as those in the first embodiment.
本実施例では、ボビン淵41の中に、補強材50をボビン淵41に組み込んでいる。これにより、ボビン淵41の強度を増加させ、コアバック31の変形を防止することができる。 In the present embodiment, the reinforcing material 50 is incorporated in the bobbin rod 41 in the bobbin rod 41. Thereby, the strength of the bobbin rod 41 can be increased and the deformation of the core back 31 can be prevented.
補強材50は金属や樹脂など、ボビン40の材質よりも強度のある材質で構成される。 The reinforcing member 50 is made of a material that is stronger than the material of the bobbin 40, such as metal or resin.
10 分割コア組立
20 焼き嵌めリング
30 分割コア
31 コアバック
32 ティース
40 ボビン
41 ボビン淵
50 補強材
10 Divided Core Assembly 20 Shrink Fit Ring 30 Divided Core 31 Core Back 32 Teeth 40 Bobbin 41 Bobbin Reed 50 Reinforcing Material
Claims (3)
複数の前記分割コアを環状に組み立てて構成された分割コア組立と、
前記分割コア組立の径方向外周に設けられた焼き嵌めリングとを備えるステータを有する回転電機において、
前記ボビンはボビン淵を有し、
前記ボビン淵の径方向の幅は、前記分割コアの軸方向端面において、前記分割コアの円周方向端部に接触する部分の幅が、分割コア円周方向中央の部分の幅より大きくなっている回転電機。 A thin core is laminated, a bobbin is assembled, and a split core configured by winding a coil around the bobbin;
A split core assembly configured by annularly assembling a plurality of the split cores;
In a rotating electrical machine having a stator including a shrink-fit ring provided on a radially outer periphery of the split core assembly,
The bobbin has a bobbin spear;
The width in the radial direction of the bobbin rod is such that the width of the portion in contact with the circumferential end of the divided core is larger than the width of the central portion in the circumferential direction of the divided core on the axial end surface of the divided core. Rotating electric machine.
複数の前記分割コアを環状に組み立てて構成された分割コア組立と、
前記分割コア組立の径方向外周に設けられた焼き嵌めリングとを備えるステータを有する回転電機において、
前記ボビンはボビン淵を有し、
前記ボビン淵の径方向の幅が、当該ボビン淵が前記分割コアのコアバックの端面に接触する部分から、当該ボビン淵の軸方向端部に向かって、段差又は傾斜をともなって小さくなっている回転電機。 A thin core is laminated, a bobbin is assembled, and a split core configured by winding a coil around the bobbin;
A split core assembly configured by annularly assembling a plurality of the split cores;
In a rotating electrical machine having a stator including a shrink-fit ring provided on a radially outer periphery of the split core assembly,
The bobbin has a bobbin spear;
The width in the radial direction of the bobbin rod decreases with a step or an inclination from the portion where the bobbin rod contacts the end surface of the core back of the split core toward the axial end of the bobbin rod. Rotating electric machine.
複数の前記分割コアを環状に組み立てて構成された分割コア組立と、
前記分割コア組立の径方向外周に設けられた焼き嵌めリングとを備えるステータを有する回転電機において、
前記ボビンはボビン淵を有し、
ボビン淵の中に金属もしくは、ボビンの材質よりも強度のある物質からなる補強材が組み込まれた回転電機。 A thin core is laminated, a bobbin is assembled, and a split core configured by winding a coil around the bobbin;
A split core assembly configured by annularly assembling a plurality of the split cores;
In a rotating electrical machine having a stator including a shrink-fit ring provided on a radially outer periphery of the split core assembly,
The bobbin has a bobbin spear;
A rotating electrical machine in which a reinforcing material made of metal or a material stronger than the bobbin material is incorporated in the bobbin cage.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US10312778B2 (en) | 2014-04-04 | 2019-06-04 | Mitsubishi Electric Corporation | Stator of rotary electric machine and method for manufacturing same |
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JPH0946986A (en) * | 1995-07-28 | 1997-02-14 | Matsushita Electric Ind Co Ltd | Small motor |
JPH11332155A (en) * | 1998-05-08 | 1999-11-30 | Toshiba Corp | Stator for motor and closed type motor-operated compressor |
JP2003259609A (en) * | 2002-03-01 | 2003-09-12 | Fuji Electric Co Ltd | Assembling method for rotary electric machine |
JP2009124851A (en) * | 2007-11-14 | 2009-06-04 | Asmo Co Ltd | Manufacturing method for stator, stator, and brushless motor |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0946986A (en) * | 1995-07-28 | 1997-02-14 | Matsushita Electric Ind Co Ltd | Small motor |
JPH11332155A (en) * | 1998-05-08 | 1999-11-30 | Toshiba Corp | Stator for motor and closed type motor-operated compressor |
JP2003259609A (en) * | 2002-03-01 | 2003-09-12 | Fuji Electric Co Ltd | Assembling method for rotary electric machine |
JP2009124851A (en) * | 2007-11-14 | 2009-06-04 | Asmo Co Ltd | Manufacturing method for stator, stator, and brushless motor |
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Publication number | Priority date | Publication date | Assignee | Title |
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US10312778B2 (en) | 2014-04-04 | 2019-06-04 | Mitsubishi Electric Corporation | Stator of rotary electric machine and method for manufacturing same |
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