WO2016143098A1 - Stator unit and rotating electric machine using same - Google Patents

Stator unit and rotating electric machine using same Download PDF

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Publication number
WO2016143098A1
WO2016143098A1 PCT/JP2015/057187 JP2015057187W WO2016143098A1 WO 2016143098 A1 WO2016143098 A1 WO 2016143098A1 JP 2015057187 W JP2015057187 W JP 2015057187W WO 2016143098 A1 WO2016143098 A1 WO 2016143098A1
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Prior art keywords
stator
central axis
shape
direction parallel
frame body
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PCT/JP2015/057187
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French (fr)
Japanese (ja)
Inventor
美樹 前田
興起 仲
典弘 阿知和
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三菱電機株式会社
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Priority to PCT/JP2015/057187 priority Critical patent/WO2016143098A1/en
Publication of WO2016143098A1 publication Critical patent/WO2016143098A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof

Definitions

  • the present invention relates to a stator unit in which a stator is fitted into a frame, and a rotating electric machine using the stator unit.
  • a stator unit in which the stator is fitted inside a cylindrical frame may be used. is there.
  • the shape of the outer periphery of the stator viewed in the direction parallel to the central axis and the inner periphery of the frame viewed in the direction parallel to the central axis Are formed in the same polygon.
  • the stator having a polygonal outer periphery is fixed in the frame body by shrink fitting or press fitting inside the frame body.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a stator unit capable of suppressing idling, distortion, and breakage of a stator fixed in a frame.
  • the present invention provides a stator that has a cylindrical shape surrounding the periphery of the central axis, and a cylindrical shape that surrounds the periphery of the central axis.
  • the shape of the outer periphery of the stator and the shape of the inner periphery of the frame body are polygonal when viewed in a direction parallel to the central axis, and are parallel to the central axis.
  • the polygonal shape of the outer periphery of the stator viewed in the direction and the polygonal shape of the inner periphery of the frame viewed in the direction parallel to the central axis are in contact with each other, and a gap is formed at the apex portion. It is characterized by.
  • the stator unit according to the present invention has an effect of suppressing idling, distortion and breakage of the stator fixed in the frame.
  • FIG. 3 is a partial enlarged cross-sectional view of the rotating electrical machine according to the first embodiment, and is an enlarged view of a portion A shown in FIG. 2.
  • vertical to a central axis Sectional drawing which cut
  • FIG. 1 is a perspective view showing a rotating electrical machine according to the first embodiment of the present invention.
  • the rotating electrical machine 51 includes a stator 1 having a cylindrical shape surrounding the central axis C, a frame 2 having a cylindrical shape surrounding the central axis C, and the stator 1 fitted therein, And a rotor 3 that is provided inside the stator 1 and rotates about a central axis C.
  • FIG. 2 is a cross-sectional view of the rotating electrical machine 51 according to the first embodiment cut along a plane perpendicular to the central axis C.
  • 3 is a partial enlarged cross-sectional view of the rotating electrical machine 51 according to the first embodiment, and is an enlarged view of a portion A shown in FIG.
  • the central axis C extends in the depth direction of the paper.
  • the external force applied to the stator 1 is indicated by arrows.
  • a plurality of teeth 11 are formed on the stator 1 toward the inside of the cylindrical shape.
  • a space between the teeth 11 forms a slot 12.
  • the inner wall of the slot 12 is covered with insulating paper 13.
  • a winding 14 wound around the tooth 11 is disposed.
  • the stator 1 is formed by laminating electromagnetic steel plates in a direction parallel to the central axis C.
  • the shape of the outer periphery of the stator 1 viewed in a direction parallel to the central axis C exhibits an octagonal shape which is a polygonal shape.
  • the polygonal apex portion 1a on the outer periphery of the stator 1 is chamfered.
  • the apex portion 1a is a curved surface chamfered around the central axis C.
  • the shape of the inner periphery of the frame 2 viewed in a direction parallel to the central axis C is an octagonal shape that is a polygonal shape.
  • the polygonal shape of the inner periphery of the frame 2 is formed in the same shape as the shape of the outer periphery of the stator 1 where the apex portion 1a is not chamfered.
  • the stator 1 is fitted inside the frame body 2 by shrink fitting or press fitting.
  • the stator 1 and the frame 2 constitute a stator unit 41.
  • the gap 15 is formed.
  • shrink fitting which is a method for fixing the stator 1 to the frame body 2
  • the inner peripheral shape of the frame body 2 is formed smaller than the outer peripheral shape of the stator 1.
  • the shape of the inner periphery of the frame body 2 is made larger than the shape of the outer periphery of the stator 1.
  • the stator 1 is inserted inside the frame body 2.
  • the temperature of the frame body 2 is lowered, the shape of the inner periphery of the frame body 2 is reduced by contraction, and the stator 1 is fastened and fixed.
  • shrink fitting stress is generated in the stator 1 by tightening from the frame body 2.
  • stator 1 in fixing the stator 1 by press-fitting, the stator 1 is inserted inside the frame 2 by applying a load without heating the frame 2. In either case of shrink-fitting or press-fitting, the stator 1 is subjected to an external force to be fixed to the frame 2 and stress is generated.
  • the polygonal side portion of the outer periphery of the stator 1 contacts the polygonal side portion of the inner periphery of the frame 2, so that the stator 1 is inside the frame 2. It is possible to prevent idling.
  • the relationship between the distance W between the central axis C and the side in the polygonal shape of the outer periphery of the stator 1 and the distance R between the curved surface at the apex portion 1a and the central axis C is R> W. It becomes possible to prevent idling of the stator 1. For example, if the distance R is 50 mm and the distance W is 40 mm, the above relationship is satisfied.
  • FIG. 4 is a partially enlarged cross-sectional view of a rotating electrical machine shown as a comparative example.
  • an external force applied to the stator 71 is indicated by an arrow.
  • the apex portion 71a of the stator 71 is not chamfered.
  • polygonal shape of the outer periphery of the stator 1 and the polygonal shape of the inner periphery of the frame 2 are not limited to the octagonal shape.
  • FIG. 5 is a cross-sectional view of the rotating electrical machine 51 according to the modification of the first embodiment cut along a plane perpendicular to the central axis C.
  • the resin portion 19 is formed by filling the gap 15 with resin. Since heat is easily transferred from the stator 1 to the frame body 2 through the resin portion 19 even in the gap 15 portion, the heat dissipation of the rotating electrical machine 51 can be improved.
  • an epoxy resin which is a high thermal conductive resin whose thermal conductivity is higher than that of a silicone resin, as the resin filled in the resin portion 19, it is possible to further improve the heat dissipation.
  • the thermal conductivity of the epoxy resin is 0.6 to 2.3 W / mk, and the thermal conductivity of the silicone resin is about 0.15 to 0.16 W / mk. Further, by forming the resin portion 19 using a resin having a lower strength than the stator 1, it is possible to reduce stress concentrated on the apex portion 1 a via the resin portion 19 by deformation of the resin portion 19. Become.
  • FIG. FIG. 6 is a cross-sectional view of the rotary electric machine 52 according to the second embodiment of the present invention cut along a plane perpendicular to the central axis C.
  • a rotating electrical machine 52 according to the second embodiment includes a stator unit 42 and a rotor 3.
  • the stator unit 42 includes the stator 4 and the frame body 2.
  • the shape of the outer periphery of the stator 4 viewed in the direction parallel to the central axis C exhibits an octagonal shape that is a polygonal shape.
  • the polygonal apex portion 4a of the stator 4 viewed in the direction parallel to the central axis C is chamfered by a plane, and a gap 16 is formed between the stator 4 and the frame 2 at the apex portion 4a.
  • the polygonal shape of the outer periphery of the stator 4 and the polygonal shape of the inner periphery of the frame body 2 abut each other.
  • the polygonal side portion of the outer periphery of the stator 4 is in contact with the polygonal side portion of the inner periphery of the frame body 2, so that the stator 4 is framed. It is possible to prevent idling inside the body 2.
  • stator 4 stress for fixing the stator 4 is unlikely to occur in the apex portion 4a of the stator 4 where the gap 16 is formed between the frame 2 and the frame body 2. Therefore, distortion and breakage of the stator 4 due to stress concentration at the apex portion 4a can be suppressed. Further, by suppressing distortion and breakage of the stator 4, it is possible to suppress a decrease in magnetic permeability and a decrease in operating efficiency of the rotating electrical machine 52.
  • the polygonal shape of the outer periphery of the stator 4 is not limited to the octagonal shape.
  • the gap 16 may be filled with resin to form a resin portion, and the heat dissipation of the rotating electrical machine 52 may be improved.
  • FIG. 7 is a cross-sectional view of the rotating electrical machine 53 according to the third embodiment of the present invention cut along a plane perpendicular to the central axis C.
  • a rotating electrical machine 53 according to the third embodiment includes a stator unit 43 and a rotor 3.
  • the stator unit 43 includes a stator 5 and a frame body 6.
  • the shape of the outer periphery of the stator 5 viewed in a direction parallel to the central axis C exhibits an octagonal shape that is a polygonal shape.
  • the polygonal apex portion 5a of the stator 4 viewed in the direction parallel to the central axis C is not chamfered.
  • the shape of the inner periphery of the frame 6 viewed in a direction parallel to the central axis C is an octagonal shape that is a polygonal shape.
  • a concave portion 6 a that is recessed toward the outer peripheral side is formed at the apex portion of the polygonal shape on the inner periphery of the frame body 6.
  • the polygonal shape of the inner periphery of the frame 6 is formed in the same shape as the outer periphery of the stator 5 in a state where the recess 6a is not formed.
  • a gap 17 is formed between the stator 5 and the frame body 6 at the apex portion 5 a of the stator 5. Moreover, the polygonal shape of the outer periphery of the stator 5 and the polygonal shape of the inner periphery of the frame 6 abut each other.
  • the polygonal side portion of the outer periphery of the stator 5 comes into contact with the polygonal side portion of the inner periphery of the frame 6, so that the stator 5 is framed. It is possible to prevent idling inside the body 6.
  • stator 5 stress for fixing the stator 5 is hardly generated at the apex portion 5a of the stator 5 in which the gap 17 is formed between the frame body 6 and the frame body 6. Therefore, distortion and breakage of the stator 5 due to the concentration of stress at the apex portion 5a can be suppressed. In addition, by suppressing distortion and breakage of the stator 5, it is possible to suppress a decrease in magnetic permeability and a decrease in operating efficiency of the rotating electrical machine 53.
  • the polygonal shape of the outer periphery of the stator 5 is not limited to the octagonal shape.
  • the gap 17 may be filled with resin to form a resin portion, and the heat dissipation of the rotating electrical machine 53 may be improved.
  • FIG. FIG. 8 is a cross-sectional view of the rotating electrical machine 54 according to the fourth embodiment of the present invention cut along a plane perpendicular to the central axis C.
  • a rotating electrical machine 54 according to the fourth embodiment includes a stator unit 44 and a rotor 3.
  • the stator unit 44 includes a stator 8 and a frame body 7.
  • the shape of the inner periphery of the frame 7 viewed in a direction parallel to the central axis C has a hexagonal shape that is a polygonal shape.
  • the shape of the outer periphery of the stator 8 viewed in a direction parallel to the central axis C exhibits a polygonal shape of a hexagon.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

A stator unit (41) is provided with: a stator (1) showing a cylindrical shape surrounding the circumference of a central axis; and a frame body (2) showing a cylindrical shape surrounding the circumference of the central axis and having the stator (1) fitted thereinside. The outer peripheral shape of the stator (1) and the inner peripheral shape of the frame body (2) show polygonal shapes when viewed in a direction parallel with the central axis, wherein the polygonal shape of the outer periphery of the stator (1) when viewed in the direction parallel with the central axis and the polygonal shape of the inner periphery of the frame body (2) when viewed in the direction parallel with the central axis touch each other at the sides and have spaces formed at the vertex portions. The stator unit (41) can suppress the slip, deformation, and damage of the stator (1) fixed inside the frame body (2).

Description

固定子ユニットおよびそれを用いた回転電機Stator unit and rotating electric machine using the same
　本発明は、固定子が枠体に嵌め込まれた固定子ユニットおよびそれを用いた回転電機に関する。 The present invention relates to a stator unit in which a stator is fitted into a frame, and a rotating electric machine using the stator unit.
　中心軸を中心に回転する回転子と、回転子の周囲を囲む筒状の固定子を備える回転電機において、固定子が筒状の枠体の内側に嵌め込まれた固定子ユニットが用いられる場合がある。枠体内での固定子の空転を防止するために、特許文献１では、中心軸に平行な方向で見た固定子の外周の形状と、中心軸に平行な方向で見た枠体の内周の形状とを、同じ多角形に形成している。外周の形状が多角形に形成された固定子は、枠体の内側への焼嵌めまたは圧入によって、枠体内に固定される。 In a rotating electrical machine including a rotor that rotates around a central axis and a cylindrical stator that surrounds the rotor, a stator unit in which the stator is fitted inside a cylindrical frame may be used. is there. In order to prevent idling of the stator in the frame, in Patent Document 1, the shape of the outer periphery of the stator viewed in the direction parallel to the central axis and the inner periphery of the frame viewed in the direction parallel to the central axis Are formed in the same polygon. The stator having a polygonal outer periphery is fixed in the frame body by shrink fitting or press fitting inside the frame body.
特開２００３－３２９２３号公報JP 2003-32923 A
　枠体内への焼嵌めまたは圧入によって、固定子には外力が加わり、応力が生じる。特許文献１に示すように、枠体の内周と固定子の外周とが全周で当接している場合には、枠体内に加わる外力によって、固定子に歪みおよび破損が生じる場合がある。固定子に歪みおよび破損が生じると、透磁率の低下によって、固定子ユニットを用いた回転電機の作動効率の低下を招く場合がある。 焼 By shrink fitting or press fitting into the frame body, external force is applied to the stator and stress is generated. As shown in Patent Document 1, when the inner periphery of the frame body and the outer periphery of the stator are in contact with each other around the entire periphery, the stator may be distorted and damaged by an external force applied to the frame body. When distortion and breakage occur in the stator, a decrease in magnetic permeability may cause a decrease in operating efficiency of the rotating electrical machine using the stator unit.
　本発明は、上記に鑑みてなされたものであって、枠体内に固定される固定子の空転と、歪みおよび破損とを抑えることのできる固定子ユニットを得ることを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to obtain a stator unit capable of suppressing idling, distortion, and breakage of a stator fixed in a frame.
　上述した課題を解決し、目的を達成するために、本発明は、中心軸の周囲を囲む筒状形状を呈する固定子と、中心軸の周囲を囲む筒状形状を呈して、内部に固定子が嵌め込まれた枠体と、を備え、固定子の外周の形状と、枠体の内周の形状は、中心軸に平行な方向で見て多角形形状を呈しており、中心軸に平行な方向で見た固定子の外周の多角形形状と、中心軸に平行な方向で見た枠体の内周の多角形形状とが、辺同士では当接し、頂点部分では隙間が形成されることを特徴とする。 In order to solve the above-described problems and achieve the object, the present invention provides a stator that has a cylindrical shape surrounding the periphery of the central axis, and a cylindrical shape that surrounds the periphery of the central axis. The shape of the outer periphery of the stator and the shape of the inner periphery of the frame body are polygonal when viewed in a direction parallel to the central axis, and are parallel to the central axis. The polygonal shape of the outer periphery of the stator viewed in the direction and the polygonal shape of the inner periphery of the frame viewed in the direction parallel to the central axis are in contact with each other, and a gap is formed at the apex portion. It is characterized by.
　本発明にかかる固定子ユニットは、枠体内に固定される固定子の空転、歪みおよび破損を抑えることができるという効果を奏する。 The stator unit according to the present invention has an effect of suppressing idling, distortion and breakage of the stator fixed in the frame.
本発明の実施の形態１にかかる回転電機を示す斜視図The perspective view which shows the rotary electric machine concerning Embodiment 1 of this invention. 実施の形態１にかかる回転電機を中心軸に垂直となる面で切断した断面図Sectional drawing which cut | disconnected the rotary electric machine concerning Embodiment 1 by the surface perpendicular | vertical to a central axis 実施の形態１にかかる回転電機の部分拡大断面図であって、図２に示すＡ部分を拡大した図FIG. 3 is a partial enlarged cross-sectional view of the rotating electrical machine according to the first embodiment, and is an enlarged view of a portion A shown in FIG. 2. 比較例として示す回転電機の部分拡大断面図Partial enlarged sectional view of a rotating electrical machine shown as a comparative example 実施の形態１の変形例にかかる回転電機を中心軸に垂直となる面で切断した断面図Sectional drawing which cut | disconnected the rotary electric machine concerning the modification of Embodiment 1 in the surface perpendicular | vertical to a central axis 本発明の実施の形態２にかかる回転電機を中心軸に垂直となる面で切断した断面図Sectional drawing which cut | disconnected the rotary electric machine concerning Embodiment 2 of this invention in the surface perpendicular | vertical to a central axis. 本発明の実施の形態３にかかる回転電機を中心軸に垂直となる面で切断した断面図Sectional drawing which cut | disconnected the rotary electric machine concerning Embodiment 3 of this invention by the surface perpendicular | vertical to a central axis. 本発明の実施の形態４にかかる回転電機を中心軸に垂直となる面で切断した断面図Sectional drawing which cut | disconnected the rotary electric machine concerning Embodiment 4 of this invention by the surface perpendicular | vertical to a central axis.
　以下に、本発明の実施の形態にかかる固定子ユニットおよび回転電機を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, a stator unit and a rotating electrical machine according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態１．
　図１は、本発明の実施の形態１にかかる回転電機を示す斜視図である。回転電機５１は、中心軸Ｃの周囲を囲む筒状形状を呈する固定子１と、中心軸Ｃの周囲を囲む筒状形状を呈して、内部に固定子１が嵌め込まれた枠体２と、固定子１の内側に設けられて中心軸Ｃを中心に回転する回転子３と、を備える。 Embodiment 1 FIG.
FIG. 1 is a perspective view showing a rotating electrical machine according to the first embodiment of the present invention. The rotating electrical machine 51 includes a stator 1 having a cylindrical shape surrounding the central axis C, a frame 2 having a cylindrical shape surrounding the central axis C, and the stator 1 fitted therein, And a rotor 3 that is provided inside the stator 1 and rotates about a central axis C.
　図２は、実施の形態１にかかる回転電機５１を中心軸Ｃに垂直となる面で切断した断面図である。図３は、実施の形態１にかかる回転電機５１の部分拡大断面図であって、図２に示すＡ部分を拡大した図である。図２において、中心軸Ｃは紙面の奥行き方向に延びている。図３では、固定子１に加わる外力を矢印で示している。 FIG. 2 is a cross-sectional view of the rotating electrical machine 51 according to the first embodiment cut along a plane perpendicular to the central axis C. 3 is a partial enlarged cross-sectional view of the rotating electrical machine 51 according to the first embodiment, and is an enlarged view of a portion A shown in FIG. In FIG. 2, the central axis C extends in the depth direction of the paper. In FIG. 3, the external force applied to the stator 1 is indicated by arrows.
　固定子１には、筒状形状の内側に向けて複数のティース１１が形成されている。ティース１１間の空間がスロット１２を形成する。スロット１２の内壁は絶縁紙１３で覆われている。スロット１２の内部は、ティース１１に巻き付けられた巻線１４が配置されている。固定子１は、中心軸Ｃに平行な方向に電磁鋼板が積層されて形成される。 A plurality of teeth 11 are formed on the stator 1 toward the inside of the cylindrical shape. A space between the teeth 11 forms a slot 12. The inner wall of the slot 12 is covered with insulating paper 13. Inside the slot 12, a winding 14 wound around the tooth 11 is disposed. The stator 1 is formed by laminating electromagnetic steel plates in a direction parallel to the central axis C.
　図２に示すように、中心軸Ｃに平行な方向で見た固定子１の外周の形状は、多角形形状である八角形形状を呈している。また、固定子１の外周の多角形形状の頂点部分１ａは面取りされている。本実施の形態１では、頂点部分１ａは中心軸Ｃを中心として面取りされた曲面となっている。 As shown in FIG. 2, the shape of the outer periphery of the stator 1 viewed in a direction parallel to the central axis C exhibits an octagonal shape which is a polygonal shape. The polygonal apex portion 1a on the outer periphery of the stator 1 is chamfered. In the first embodiment, the apex portion 1a is a curved surface chamfered around the central axis C.
　中心軸Ｃに平行な方向で見た枠体２の内周の形状は、多角形形状である八角形形状を呈している。枠体２の内周の多角形形状は、頂点部分１ａが面取りされていない固定子１の外周の形状と同じ形状に形成されている。固定子１は、焼嵌めまたは圧入によって枠体２の内側に嵌め込まれる。固定子１と枠体２とで固定子ユニット４１を構成する。 The shape of the inner periphery of the frame 2 viewed in a direction parallel to the central axis C is an octagonal shape that is a polygonal shape. The polygonal shape of the inner periphery of the frame 2 is formed in the same shape as the shape of the outer periphery of the stator 1 where the apex portion 1a is not chamfered. The stator 1 is fitted inside the frame body 2 by shrink fitting or press fitting. The stator 1 and the frame 2 constitute a stator unit 41.
　固定子１の頂点部分１ａが面取りされているため、固定子１の外周の多角形形状と、枠体２の内周の多角形形状とが辺同士では当接し、固定子１の頂点部分１ａでは隙間１５が形成される。 Since the apex portion 1a of the stator 1 is chamfered, the polygonal shape of the outer periphery of the stator 1 and the polygonal shape of the inner periphery of the frame 2 abut each other, and the apex portion 1a of the stator 1 Then, the gap 15 is formed.
　ここで、固定子１を枠体２に固定する手法である焼嵌めについて説明する。常温の環境下において、枠体２の内周の形状を、固定子１の外周の形状よりも小さく形成しておく。枠体２を加熱して膨張させることで、枠体２の内周の形状を固定子１の外周の形状よりも大きくさせる。この状態で、枠体２の内側に固定子１を挿入する。枠体２の温度が低下すると、収縮によって枠体２の内周の形状が縮小し、固定子１が締め付けられて固定される。焼嵌めでは、枠体２からの締め付けによって、固定子１に応力が生じる。 Here, shrink fitting, which is a method for fixing the stator 1 to the frame body 2, will be described. In a room temperature environment, the inner peripheral shape of the frame body 2 is formed smaller than the outer peripheral shape of the stator 1. By heating and expanding the frame body 2, the shape of the inner periphery of the frame body 2 is made larger than the shape of the outer periphery of the stator 1. In this state, the stator 1 is inserted inside the frame body 2. When the temperature of the frame body 2 is lowered, the shape of the inner periphery of the frame body 2 is reduced by contraction, and the stator 1 is fastened and fixed. In shrink fitting, stress is generated in the stator 1 by tightening from the frame body 2.
　これに対して、圧入による固定子１の固定では、枠体２を加熱せずに、荷重を加えて固定子１を枠体２の内側に挿入する。焼嵌めおよび圧入のどちらの場合であっても、固定子１には、枠体２に固定されるための外力が加わって応力が生じることとなる。 On the other hand, in fixing the stator 1 by press-fitting, the stator 1 is inserted inside the frame 2 by applying a load without heating the frame 2. In either case of shrink-fitting or press-fitting, the stator 1 is subjected to an external force to be fixed to the frame 2 and stress is generated.
　以上説明した回転電機５１では、固定子１の外周の多角形形状の辺部分が、枠体２の内周の多角形形状の辺部分と当接することで、固定子１が枠体２の内側で空転することが防止される。なお、固定子１の外周の多角形形状における中心軸Ｃと辺との距離Ｗと、頂点部分１ａでの曲面と中心軸Ｃとの距離Ｒとの関係を、Ｒ＞Ｗとすることで、固定子１の空転を防ぐことが可能となる。例えば、距離Ｒが５０ｍｍで、距離Ｗが４０ｍｍであれば、上記関係を満たす。 In the rotating electrical machine 51 described above, the polygonal side portion of the outer periphery of the stator 1 contacts the polygonal side portion of the inner periphery of the frame 2, so that the stator 1 is inside the frame 2. It is possible to prevent idling. The relationship between the distance W between the central axis C and the side in the polygonal shape of the outer periphery of the stator 1 and the distance R between the curved surface at the apex portion 1a and the central axis C is R> W. It becomes possible to prevent idling of the stator 1. For example, if the distance R is 50 mm and the distance W is 40 mm, the above relationship is satisfied.
　固定子１の辺部分に外力が加わる場合よりも、頂点部分１ａに外力が加わる場合のほうが、応力の集中によって固定子１に歪みや破損が生じやすい。ここで、本実施の形態１では、図３に示すように、枠体２との間に隙間１５が形成された固定子１の頂点部分１ａには、固定子１を固定するための外力が加わりにくい。図４は、比較例として示す回転電機の部分拡大断面図である。図４では、固定子７１に加わる外力を矢印で示している。比較例として示す回転電機７０では、固定子７１の頂点部分７１ａが面取りされていない。そのため、枠体７６から頂点部分７１ａに外力が加わりやすくなっている。このように、固定子の頂点部分に面取りが形成されていない場合に比べて、本実施の形態１にかかる回転電機５１では、頂点部分１ａでの応力の集中による固定子１の歪みおよび破損を抑えることができる。また、固定子１の歪みおよび破損を抑えることで、透磁率の低下を抑えて、回転電機５１の作動効率の低下を抑えることができる。 When the external force is applied to the apex portion 1a, the stator 1 is more likely to be distorted or broken due to stress concentration than when the external force is applied to the side portion of the stator 1. Here, in the first embodiment, as shown in FIG. 3, an external force for fixing the stator 1 is applied to the apex portion 1 a of the stator 1 in which the gap 15 is formed between the frame body 2. Hard to join. FIG. 4 is a partially enlarged cross-sectional view of a rotating electrical machine shown as a comparative example. In FIG. 4, an external force applied to the stator 71 is indicated by an arrow. In a rotating electrical machine 70 shown as a comparative example, the apex portion 71a of the stator 71 is not chamfered. Therefore, an external force is easily applied from the frame 76 to the apex portion 71a. Thus, compared with the case where chamfering is not formed at the apex portion of the stator, in the rotating electrical machine 51 according to the first embodiment, distortion and breakage of the stator 1 due to stress concentration at the apex portion 1a. Can be suppressed. In addition, by suppressing distortion and breakage of the stator 1, it is possible to suppress a decrease in magnetic permeability and a decrease in operating efficiency of the rotating electrical machine 51.
　なお、固定子１の外周の多角形形状および枠体２の内周の多角形形状は、八角形形状に限られない。 In addition, the polygonal shape of the outer periphery of the stator 1 and the polygonal shape of the inner periphery of the frame 2 are not limited to the octagonal shape.
　図５は、実施の形態１の変形例にかかる回転電機５１を中心軸Ｃに垂直となる面で切断した断面図である。本変形例では、隙間１５に樹脂が充填されて樹脂部１９が形成されている。隙間１５部分でも樹脂部１９を介して固定子１から枠体２に熱が伝わりやすくなるため、回転電機５１の放熱性の向上を図ることができる。例えば、樹脂部１９に充填される樹脂として、熱伝導率がシリコーン樹脂よりも高い高熱伝導樹脂であるエポキシ樹脂を用いることで、放熱性のより一層の向上を図ることができる。なお、エポキシ樹脂の熱伝導率は０．６～２．３Ｗ／ｍｋであり、シリコーン樹脂の熱伝導率は約０．１５～０．１６Ｗ／ｍｋである。また、固定子１よりも強度の低い樹脂を用いて樹脂部１９を形成することで、樹脂部１９を介して頂点部分１ａに集中する応力を、樹脂部１９の変形によって軽減することが可能となる。 FIG. 5 is a cross-sectional view of the rotating electrical machine 51 according to the modification of the first embodiment cut along a plane perpendicular to the central axis C. In this modification, the resin portion 19 is formed by filling the gap 15 with resin. Since heat is easily transferred from the stator 1 to the frame body 2 through the resin portion 19 even in the gap 15 portion, the heat dissipation of the rotating electrical machine 51 can be improved. For example, by using an epoxy resin, which is a high thermal conductive resin whose thermal conductivity is higher than that of a silicone resin, as the resin filled in the resin portion 19, it is possible to further improve the heat dissipation. The thermal conductivity of the epoxy resin is 0.6 to 2.3 W / mk, and the thermal conductivity of the silicone resin is about 0.15 to 0.16 W / mk. Further, by forming the resin portion 19 using a resin having a lower strength than the stator 1, it is possible to reduce stress concentrated on the apex portion 1 a via the resin portion 19 by deformation of the resin portion 19. Become.
実施の形態２．
　図６は、本発明の実施の形態２にかかる回転電機５２を中心軸Ｃに垂直となる面で切断した断面図である。なお、上記実施の形態と同様の構成については、同様の符号を付して詳細な説明を省略する。本実施の形態２にかかる回転電機５２は、固定子ユニット４２と回転子３とを備える。固定子ユニット４２は、固定子４と枠体２とを備える。 Embodiment 2. FIG.
FIG. 6 is a cross-sectional view of the rotary electric machine 52 according to the second embodiment of the present invention cut along a plane perpendicular to the central axis C. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. A rotating electrical machine 52 according to the second embodiment includes a stator unit 42 and a rotor 3. The stator unit 42 includes the stator 4 and the frame body 2.
　中心軸Ｃに平行な方向で見た固定子４の外周の形状は、多角形形状である八角形形状を呈する。中心軸Ｃに平行な方向で見た固定子４の多角形形状の頂点部分４ａが、平面にて面取りされて、頂点部分４ａで固定子４と枠体２との間に隙間１６が形成される。また、固定子４の外周の多角形形状と、枠体２の内周の多角形形状とが辺同士で当接する。 The shape of the outer periphery of the stator 4 viewed in the direction parallel to the central axis C exhibits an octagonal shape that is a polygonal shape. The polygonal apex portion 4a of the stator 4 viewed in the direction parallel to the central axis C is chamfered by a plane, and a gap 16 is formed between the stator 4 and the frame 2 at the apex portion 4a. The Moreover, the polygonal shape of the outer periphery of the stator 4 and the polygonal shape of the inner periphery of the frame body 2 abut each other.
　本実施の形態２にかかる回転電機５２では、固定子４の外周の多角形形状の辺部分が、枠体２の内周の多角形形状の辺部分と当接することで、固定子４が枠体２の内側で空転することが防止される。 In the rotating electrical machine 52 according to the second embodiment, the polygonal side portion of the outer periphery of the stator 4 is in contact with the polygonal side portion of the inner periphery of the frame body 2, so that the stator 4 is framed. It is possible to prevent idling inside the body 2.
　また、枠体２との間に隙間１６が形成された固定子４の頂点部分４ａには、固定子４を固定するための応力が生じにくい。そのため、頂点部分４ａでの応力の集中による固定子４の歪みおよび破損を抑えることができる。また、固定子４の歪みおよび破損を抑えることで、透磁率の低下を抑えて、回転電機５２の作動効率の低下を抑えることができる。 Also, stress for fixing the stator 4 is unlikely to occur in the apex portion 4a of the stator 4 where the gap 16 is formed between the frame 2 and the frame body 2. Therefore, distortion and breakage of the stator 4 due to stress concentration at the apex portion 4a can be suppressed. Further, by suppressing distortion and breakage of the stator 4, it is possible to suppress a decrease in magnetic permeability and a decrease in operating efficiency of the rotating electrical machine 52.
　なお、固定子４の外周の多角形形状は、八角形形状に限られない。また、上記実施の形態１の変形例と同様に、隙間１６に樹脂を充填して樹脂部を形成し、回転電機５２の放熱性の向上を図ってもよい。 Note that the polygonal shape of the outer periphery of the stator 4 is not limited to the octagonal shape. Further, as in the modification of the first embodiment, the gap 16 may be filled with resin to form a resin portion, and the heat dissipation of the rotating electrical machine 52 may be improved.
実施の形態３．
　図７は、本発明の実施の形態３にかかる回転電機５３を中心軸Ｃに垂直となる面で切断した断面図である。なお、上記実施の形態と同様の構成については、同様の符号を付して詳細な説明を省略する。本実施の形態３にかかる回転電機５３は、固定子ユニット４３と回転子３とを備える。固定子ユニット４３は、固定子５と枠体６とを備える。 Embodiment 3 FIG.
FIG. 7 is a cross-sectional view of the rotating electrical machine 53 according to the third embodiment of the present invention cut along a plane perpendicular to the central axis C. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. A rotating electrical machine 53 according to the third embodiment includes a stator unit 43 and a rotor 3. The stator unit 43 includes a stator 5 and a frame body 6.
　中心軸Ｃに平行な方向で見た固定子５の外周の形状は、多角形形状である八角形形状を呈する。本実施の形態３では、中心軸Ｃに平行な方向で見た固定子４の多角形形状の頂点部分５ａが面取りされていない。 The shape of the outer periphery of the stator 5 viewed in a direction parallel to the central axis C exhibits an octagonal shape that is a polygonal shape. In the third embodiment, the polygonal apex portion 5a of the stator 4 viewed in the direction parallel to the central axis C is not chamfered.
　中心軸Ｃに平行な方向で見た枠体６の内周の形状は、多角形形状である八角形形状を呈している。枠体６の内周の多角形形状の頂点部分には、外周側に凹む凹部６ａが形成されている。枠体６の内周の多角形形状は、凹部６ａが形成されない状態で、固定子５の外周の形状と同じ形状に形成されている。 The shape of the inner periphery of the frame 6 viewed in a direction parallel to the central axis C is an octagonal shape that is a polygonal shape. A concave portion 6 a that is recessed toward the outer peripheral side is formed at the apex portion of the polygonal shape on the inner periphery of the frame body 6. The polygonal shape of the inner periphery of the frame 6 is formed in the same shape as the outer periphery of the stator 5 in a state where the recess 6a is not formed.
　枠体６の頂点部分に凹部６ａが形成されることで、固定子５の頂点部分５ａで固定子５と枠体６との間に隙間１７が形成される。また、固定子５の外周の多角形形状と、枠体６の内周の多角形形状とが辺同士で当接する。 By forming the recess 6 a at the apex portion of the frame body 6, a gap 17 is formed between the stator 5 and the frame body 6 at the apex portion 5 a of the stator 5. Moreover, the polygonal shape of the outer periphery of the stator 5 and the polygonal shape of the inner periphery of the frame 6 abut each other.
　本実施の形態３にかかる回転電機５３では、固定子５の外周の多角形形状の辺部分が、枠体６の内周の多角形形状の辺部分と当接することで、固定子５が枠体６の内側で空転することが防止される。 In the rotating electrical machine 53 according to the third embodiment, the polygonal side portion of the outer periphery of the stator 5 comes into contact with the polygonal side portion of the inner periphery of the frame 6, so that the stator 5 is framed. It is possible to prevent idling inside the body 6.
　また、枠体６との間に隙間１７が形成された固定子５の頂点部分５ａには、固定子５を固定するための応力が生じにくい。そのため、頂点部分５ａでの応力の集中による固定子５の歪みおよび破損を抑えることができる。また、固定子５の歪みおよび破損を抑えることで、透磁率の低下を抑えて、回転電機５３の作動効率の低下を抑えることができる。 Further, stress for fixing the stator 5 is hardly generated at the apex portion 5a of the stator 5 in which the gap 17 is formed between the frame body 6 and the frame body 6. Therefore, distortion and breakage of the stator 5 due to the concentration of stress at the apex portion 5a can be suppressed. In addition, by suppressing distortion and breakage of the stator 5, it is possible to suppress a decrease in magnetic permeability and a decrease in operating efficiency of the rotating electrical machine 53.
　なお、固定子５の外周の多角形形状は、八角形形状に限られない。また、上記実施の形態１の変形例と同様に、隙間１７に樹脂を充填して樹脂部を形成し、回転電機５３の放熱性の向上を図ってもよい。 Note that the polygonal shape of the outer periphery of the stator 5 is not limited to the octagonal shape. Further, similarly to the modification of the first embodiment, the gap 17 may be filled with resin to form a resin portion, and the heat dissipation of the rotating electrical machine 53 may be improved.
実施の形態４．
　図８は、本発明の実施の形態４にかかる回転電機５４を中心軸Ｃに垂直となる面で切断した断面図である。なお、上記実施の形態と同様の構成については、同様の符号を付して詳細な説明を省略する。本実施の形態４にかかる回転電機５４は、固定子ユニット４４と回転子３とを備える。固定子ユニット４４は、固定子８と枠体７とを備える。 Embodiment 4 FIG.
FIG. 8 is a cross-sectional view of the rotating electrical machine 54 according to the fourth embodiment of the present invention cut along a plane perpendicular to the central axis C. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. A rotating electrical machine 54 according to the fourth embodiment includes a stator unit 44 and a rotor 3. The stator unit 44 includes a stator 8 and a frame body 7.
　枠体７は、中心軸Ｃに平行な方向で見た枠体７の内周の形状は、多角形形状である六角形形状を呈している。中心軸Ｃに平行な方向で見た固定子８の外周の形状は、多角形形状である九角形形状を呈する。枠体７の内周に固定子８を嵌め込むことで、固定子８の外周の３辺が当接して、枠体７の内側で固定子５が空転することが防止される。また、枠体７の内周が呈する多角形形状の頂点部分７ａに隙間が形成されるため、応力の集中による固定子８の歪みおよび破損を抑えることができる。 The shape of the inner periphery of the frame 7 viewed in a direction parallel to the central axis C has a hexagonal shape that is a polygonal shape. The shape of the outer periphery of the stator 8 viewed in a direction parallel to the central axis C exhibits a polygonal shape of a hexagon. By fitting the stator 8 into the inner periphery of the frame body 7, the three sides of the outer periphery of the stator 8 come into contact with each other, and the stator 5 is prevented from idling inside the frame body 7. Further, since a gap is formed in the polygonal apex portion 7a exhibited by the inner periphery of the frame body 7, distortion and breakage of the stator 8 due to stress concentration can be suppressed.
　なお、固定子の外周が呈する多角形形状の角数をＮとし、枠体の内周が呈する多角形形状の角数をＭとした場合に、Ｍ＜Ｎとし、固定子の外周が呈する多角形形状の３辺以上を、枠体の内周と当接させることで、図７に示す例とは異なる角数の多角形を用いて、本実施の形態４と同様の回転電機を得ることができる。 Note that when N is the number of polygonal corners on the outer periphery of the stator and M is the number of polygonal corners on the inner periphery of the frame, M <N, and the outer periphery of the stator exhibits many By bringing three or more sides of the rectangular shape into contact with the inner periphery of the frame, a rotating electrical machine similar to that of the fourth embodiment is obtained using a polygon having a different number of angles from the example shown in FIG. Can do.
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
　１，４，５，８　固定子、１ａ，４ａ，５ａ　頂点部分、２，６，７　枠体、３　回転子、６ａ　凹部、７ａ　頂点部分、１１　ティース、１２　スロット、１３　絶縁紙、１４　巻線、１５，１６，１７　隙間、１９　樹脂部、４１，４２，４３　固定子ユニット、５１，５２，５３，５４　回転電機。 1, 4, 5, 8 Stator, 1a, 4a, 5a vertex part, 2, 6, 7 frame, 3 rotor, 6a recess, 7a vertex part, 11 teeth, 12 slots, 13 insulation paper, 14 windings 15, 16, 17 gap, 19 resin part, 41, 42, 43 stator unit, 51, 52, 53, 54 rotating electrical machine.

Claims (7)

  1. 　中心軸の周囲を囲む筒状形状を呈する固定子と、
    　前記中心軸の周囲を囲む筒状形状を呈して、内部に前記固定子が嵌め込まれた枠体と、を備え、
    　前記固定子の外周の形状と、前記枠体の内周の形状は、前記中心軸に平行な方向で見て多角形形状を呈しており、
    　前記中心軸に平行な方向で見た前記固定子の外周の多角形形状と、前記中心軸に平行な方向で見た前記枠体の内周の多角形形状とが、辺同士では当接し、頂点部分では隙間が形成されることを特徴とする固定子ユニット。     A stator having a cylindrical shape surrounding the central axis;
    Presenting a cylindrical shape surrounding the periphery of the central axis, and a frame body in which the stator is fitted,
    The outer peripheral shape of the stator and the inner peripheral shape of the frame body have a polygonal shape when viewed in a direction parallel to the central axis,
    The polygonal shape of the outer periphery of the stator seen in the direction parallel to the central axis and the polygonal shape of the inner circumference of the frame body seen in the direction parallel to the central axis are in contact with each other, Stator unit characterized in that a gap is formed at the apex.
  2. 　前記中心軸に平行な方向で見た前記固定子の外周の多角形形状の頂点部分が面取りされて前記隙間が形成されることを特徴とする請求項１に記載の固定子ユニット。 2. The stator unit according to claim 1, wherein the apex portion of the polygonal shape on the outer periphery of the stator viewed in a direction parallel to the central axis is chamfered to form the gap.
  3. 　前記面取りは、曲面にて行われることを特徴とする請求項２に記載の固定子ユニット。 The stator unit according to claim 2, wherein the chamfering is performed by a curved surface.
  4. 　前記中心軸に平行な方向で見た前記枠体の内周の多角形形状の頂点部分に、外周側に凹む凹部が形成されて前記隙間が形成されることを特徴とする請求項１に記載の固定子ユニット。 2. The gap is formed by forming a concave portion recessed on an outer peripheral side at a vertex portion of a polygonal shape on an inner periphery of the frame body as viewed in a direction parallel to the central axis. Stator unit.
  5. 　前記隙間に樹脂が充填されて形成された樹脂部をさらに備えることを特徴とする請求項１から４のいずれか１つに記載の固定子ユニット。 The stator unit according to any one of claims 1 to 4, further comprising a resin portion formed by filling the gap with a resin.
  6. 　請求項１から５のいずれか１つに記載の固定子ユニットと、
    　前記固定子の内側に設けられて前記中心軸を中心に回転する回転子と、を備えることを特徴とする回転電機。     The stator unit according to any one of claims 1 to 5,
    A rotary electric machine comprising: a rotor provided inside the stator and rotating about the central axis.
  7. 　中心軸の周囲を囲む筒状形状を呈する固定子と、
    　前記中心軸の周囲を囲む筒状形状を呈して、内部に前記固定子が嵌め込まれた枠体と、を備え、
    　前記固定子の外周の形状は、前記中心軸に平行な方向で見て角数がＮとなる多角形形状を呈し、
    前記枠体の内周の形状は、前記中心軸に平行な方向で見て角数がＭとなる多角形形状を呈し、
    　Ｍ＜Ｎの関係が成立し、
    　前記中心軸に平行な方向で見た前記固定子の外周の多角形形状の少なくとも３つの辺が、前記中心軸に平行な方向で見た前記枠体の内周の多角形形状の辺に当接し、
    　前記中心軸に平行な方向で見た前記枠体の内周の多角形形状の頂点部分では、前記固定子との間に隙間が形成されることを特徴とする固定子ユニット。     A stator having a cylindrical shape surrounding the central axis;
    Presenting a cylindrical shape surrounding the periphery of the central axis, and a frame body in which the stator is fitted,
    The shape of the outer periphery of the stator exhibits a polygonal shape with N angles when viewed in a direction parallel to the central axis,
    The shape of the inner periphery of the frame body is a polygonal shape having an angle M when viewed in a direction parallel to the central axis,
    The relationship M <N is established,
    At least three sides of the outer polygonal shape of the stator viewed in a direction parallel to the central axis correspond to the polygonal side of the inner periphery of the frame viewed in a direction parallel to the central axis. contact,
    A stator unit, wherein a gap is formed between the frame and the apex portion of the inner periphery of the frame when viewed in a direction parallel to the central axis.
PCT/JP2015/057187 2015-03-11 2015-03-11 Stator unit and rotating electric machine using same WO2016143098A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4959208A (en) * 1972-08-01 1974-06-08
JPS54164402U (en) * 1978-05-10 1979-11-17
JPS617234U (en) * 1984-06-15 1986-01-17 三菱電機株式会社 Stator core of rotating electric machine
JPS6117840U (en) * 1984-07-04 1986-02-01 三菱電機株式会社 Stator of rotating electric machine
JPH01116556U (en) * 1988-01-28 1989-08-07
JP2004343938A (en) * 2003-05-19 2004-12-02 Mitsubishi Electric Corp Rotating machine
JP2010104229A (en) * 2008-10-24 2010-05-06 Johnson Electric Sa Electric motor
JP2010183792A (en) * 2009-02-09 2010-08-19 Jfe Steel Corp Motor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4959208A (en) * 1972-08-01 1974-06-08
JPS54164402U (en) * 1978-05-10 1979-11-17
JPS617234U (en) * 1984-06-15 1986-01-17 三菱電機株式会社 Stator core of rotating electric machine
JPS6117840U (en) * 1984-07-04 1986-02-01 三菱電機株式会社 Stator of rotating electric machine
JPH01116556U (en) * 1988-01-28 1989-08-07
JP2004343938A (en) * 2003-05-19 2004-12-02 Mitsubishi Electric Corp Rotating machine
JP2010104229A (en) * 2008-10-24 2010-05-06 Johnson Electric Sa Electric motor
JP2010183792A (en) * 2009-02-09 2010-08-19 Jfe Steel Corp Motor

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