JP2020115710A - Rotary electric machine - Google Patents

Rotary electric machine Download PDF

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Publication number
JP2020115710A
JP2020115710A JP2019006056A JP2019006056A JP2020115710A JP 2020115710 A JP2020115710 A JP 2020115710A JP 2019006056 A JP2019006056 A JP 2019006056A JP 2019006056 A JP2019006056 A JP 2019006056A JP 2020115710 A JP2020115710 A JP 2020115710A
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Prior art keywords
electromagnetic steel
case
fastening
stator core
steel sheet
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Japanese (ja)
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和弥 金田
Kazuya Kaneda
和弥 金田
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2019006056A priority Critical patent/JP2020115710A/en
Priority to CN202010046002.XA priority patent/CN111446786B/en
Publication of JP2020115710A publication Critical patent/JP2020115710A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/16Stator cores with slots for windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/32Windings characterised by the shape, form or construction of the insulation
    • H02K3/34Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/02Casings or enclosures characterised by the material thereof
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

To provide a rotary electric machine capable of preventing a coil from being short-circuited by damaging an insulating member.SOLUTION: A rotary electric machine 1 includes a stator 5 having a stator core 6 and a coil 7 attached to the stator core 6, a case 9, and a fastening member 8 for fixing the stator 5 to the case 9. The case 9 is made of a material having a higher linear expansion coefficient than the stator core 6. From among a plurality of electromagnetic steel plates 10 constituting the stator core 6, the outer peripheral edge 42A of a fastening portion 40A of a first electromagnetic steel sheet 10A abutting the case 9 is formed so as to be radially inward of the outer peripheral edge 42B of a fastening portion 40B of a second electromagnetic steel sheet 10B adjacent to the first electromagnetic steel sheet 10A.SELECTED DRAWING: Figure 4

Description

本発明は、電動車両などに搭載される回転電機に関する。 The present invention relates to a rotating electric machine mounted on an electric vehicle or the like.

従来から、ハイブリッド自動車等の車両の動力源や発電源として回転電機が使用されている。回転電機は、ステータを備える。 BACKGROUND ART Conventionally, rotating electric machines have been used as a power source and a power source for vehicles such as hybrid vehicles. The rotating electric machine includes a stator.

例えば、特許文献1の回転電機は、ステータコアとコイルとを有するステータを備える。ステータコアは、複数枚の環状のプレートが軸方向に積層されて環状に形成されている。コイルには、被膜や絶縁紙等の絶縁部が囲繞されている。ステータコアの取付部は、ケース(ステータ支持部材)に対して、例えばボルト等により固定される。 For example, the rotary electric machine of Patent Document 1 includes a stator having a stator core and a coil. The stator core is formed in an annular shape by stacking a plurality of annular plates in the axial direction. The coil is surrounded by an insulating portion such as a film or insulating paper. The mounting portion of the stator core is fixed to the case (stator support member) with, for example, bolts.

複数のティースは、ヨーク部の内周縁に周方向に間隔をあけて設けられている。周方向で隣り合うティース間には、コイルが収容されるスロットが形成されている。ティースは、ティース本体と、鍔部とを有する。 The plurality of teeth are provided on the inner peripheral edge of the yoke portion at intervals in the circumferential direction. A slot that accommodates the coil is formed between the teeth that are adjacent to each other in the circumferential direction. The tooth has a tooth body and a collar portion.

特開2010−279232号公報JP, 2010-279232, A

しかしながら、この種の回転電機は、ティースの鍔部がコイルを囲繞する絶縁被膜や絶縁紙等の絶縁部材に対して径方向から接触して、絶縁部材が損傷し、短絡が生じるおそれがあった。これについて、図9を参照して説明する。 However, in this type of rotating electrical machine, the collar portion of the tooth may come into radial contact with an insulating member such as an insulating coating or insulating paper surrounding the coil, and the insulating member may be damaged, causing a short circuit. .. This will be described with reference to FIG.

図9(a)〜(d)に示すように、ステータコア106は、ボルトの軸力ARによって、ケース109の当接部190に固定されている。ステータコア106は、電磁鋼板110が軸方向に積層されて構成される。電磁鋼板110は、例えば表面が樹脂でコーティングされている。ケースの材料は、例えばアルミニウムである。ケース109は、電磁鋼板110よりも線膨張係数が大きい。 As shown in FIGS. 9A to 9D, the stator core 106 is fixed to the contact portion 190 of the case 109 by the axial force AR of the bolt. The stator core 106 is configured by stacking electromagnetic steel plates 110 in the axial direction. The surface of the electromagnetic steel plate 110 is coated with resin, for example. The material of the case is aluminum, for example. The case 109 has a larger coefficient of linear expansion than the electromagnetic steel plate 110.

始めに、図9(a)に示すように、電磁鋼板110の外周縁112は、ケース109の当接部190の端部193と径方向で同一面上に位置している。このとき、回転電機の温度は、常温(例えば、摂氏20度)である。 First, as shown in FIG. 9A, the outer peripheral edge 112 of the electromagnetic steel plate 110 is located on the same plane in the radial direction as the end 193 of the contact portion 190 of the case 109. At this time, the temperature of the rotary electric machine is normal temperature (for example, 20 degrees Celsius).

次に、図9(b)に示すように、回転電機が高負荷状態になると、回転電機は、温度が上昇し、高温(例えば、摂氏150度)となる。すると、ステータコア106及びケース109は、ともに熱膨張するが、線膨張係数の大きいケース109の方が、ステータコア106よりも大きく膨張する。 Next, as shown in FIG. 9B, when the rotating electric machine is in a high load state, the temperature of the rotating electric machine rises and reaches a high temperature (for example, 150 degrees Celsius). Then, both the stator core 106 and the case 109 thermally expand, but the case 109 having a larger linear expansion coefficient expands more than the stator core 106.

このとき、ケース109の当接部190と電磁鋼板110の摩擦係数は、電磁鋼板110同士の摩擦係数より大きいため、ケース109の当接部190と当接する電磁鋼板110Aは、ケース109の当接部190との摩擦力によって径方向外側に引っ張られる。この結果、ケース109の当接部190と当接する電磁鋼板110Aは、電磁鋼板110Aと隣接する電磁鋼板110Bの径方向外側に突出する。さらに、ボルトの軸力ARに起因してケース109の当接部190から電磁鋼板110Aに入力される荷重により、電磁鋼板110Aの外周縁112Aは、電磁鋼板110B側に反るように変形する。 At this time, since the friction coefficient between the contact portion 190 of the case 109 and the electromagnetic steel plate 110 is larger than the friction coefficient between the electromagnetic steel plates 110, the electromagnetic steel plate 110A that contacts the contact portion 190 of the case 109 contacts the case 109. It is pulled outward in the radial direction by the frictional force with the portion 190. As a result, the electromagnetic steel plate 110A that contacts the contact portion 190 of the case 109 projects outward in the radial direction of the electromagnetic steel plate 110B that is adjacent to the electromagnetic steel plate 110A. Further, due to the load applied to the electromagnetic steel plate 110A from the contact portion 190 of the case 109 due to the axial force AR of the bolt, the outer peripheral edge 112A of the electromagnetic steel plate 110A is deformed so as to warp toward the electromagnetic steel plate 110B side.

次に、図9(c)に示すように、回転電機が高負荷状態から低負荷状態または無負荷状態になると、回転電機は、温度が低下する。すると、ステータコア106及びケース109は、ともに収縮するが、線膨張係数の大きいケース109の当接部190の方が、ステータコアよりも収縮する。 Next, as shown in FIG. 9C, when the rotary electric machine is changed from the high load state to the low load state or the no load state, the temperature of the rotary electric machine is lowered. Then, both the stator core 106 and the case 109 contract, but the contact portion 190 of the case 109 having a large linear expansion coefficient contracts more than the stator core.

このとき、ケース109の当接部190と電磁鋼板110の摩擦係数は、電磁鋼板110同士の摩擦係数より大きいため、ケース109の当接部190と当接する電磁鋼板110Aは、ケース109の当接部190との摩擦力によって径方向内側に引っ張られる。しかし、電磁鋼板110Aの外周縁112Aは、電磁鋼板110B側に反っているため、電磁鋼板110Aの屈折部113Aが電磁鋼板110Bに引っ掛かる。 At this time, since the friction coefficient between the contact portion 190 of the case 109 and the electromagnetic steel plate 110 is larger than the friction coefficient between the electromagnetic steel plates 110, the electromagnetic steel sheet 110A that contacts the contact portion 190 of the case 109 contacts the case 109. It is pulled inward in the radial direction by the frictional force with the portion 190. However, since the outer peripheral edge 112A of the electromagnetic steel plate 110A is curved toward the electromagnetic steel plate 110B side, the refraction portion 113A of the electromagnetic steel plate 110A is caught by the electromagnetic steel plate 110B.

この結果、図9(d)に示すように、常温に戻った場合でも、ケース109の当接部190と当接する電磁鋼板110Aは、外周縁112Aが電磁鋼板110Bの外周縁112Bと径方向で同一面となる位置までは戻らない。このため、電磁鋼板110Aのティースの鍔部は、電磁鋼板110Bのティースの鍔部より径方向外側に位置することとなる。これにより、電磁鋼板110Aのティースの鍔部がコイルを囲繞する絶縁被膜や絶縁紙等の絶縁部材に対して径方向から接触して、絶縁部材が損傷し、短絡が生じるおそれが生じる。 As a result, as shown in FIG. 9D, in the electromagnetic steel plate 110A that abuts the abutting portion 190 of the case 109 even when the temperature returns to room temperature, the outer peripheral edge 112A is in the radial direction with the outer peripheral edge 112B of the electromagnetic steel plate 110B. It does not return to the same plane. Therefore, the collar portions of the teeth of the electromagnetic steel plate 110A are located radially outside the collar portions of the teeth of the electromagnetic steel plate 110B. As a result, the collar portions of the teeth of the electromagnetic steel plate 110A may come into radial contact with an insulating member such as an insulating coating or insulating paper surrounding the coil, damaging the insulating member and causing a short circuit.

本発明は、絶縁部材が損傷し、コイルが短絡することを防止できる回転電機を提供する。 The present invention provides a rotating electric machine that can prevent the insulating member from being damaged and the coil from being short-circuited.

本発明は、
複数のスロット部を有する略円環形状のステータコアと、前記ステータコアに取り付けられるコイルと、を有するステータと、
前記ステータコアよりも線膨張係数が高い材料で形成されたケースと、
前記ステータを前記ケースに固定する締結部材と、を備え、
前記コイルは、前記スロット部に挿入された複数のスロットコイル部を有し、
前記複数のスロットコイル部は、絶縁部材によって隣接する前記スロットコイル部と絶縁されており、
前記ステータコアは、積層された複数の電磁鋼板から構成され、径方向外側に突出し、前記締結部材が挿通する挿通孔が形成された締結部を有し、
前記ケースは、前記ステータコアと当接し、前記締結部材が締結される締結孔が形成された当接部を有し、
前記締結部材が、前記ステータコアの前記挿通孔を挿通し、前記ケースの前記締結孔に締結されることによって、前記ステータが前記ケースに固定された回転電機であって、
前記複数の電磁鋼板のうち、前記ケースと当接する第1電磁鋼板の前記締結部の外周縁は、前記第1電磁鋼板と隣接する第2電磁鋼板の前記締結部の外周縁よりも径方向内側となるように形成される。
The present invention is
A stator having a substantially annular stator core having a plurality of slot portions and a coil attached to the stator core;
A case formed of a material having a higher linear expansion coefficient than the stator core;
A fastening member for fixing the stator to the case,
The coil has a plurality of slot coil portions inserted into the slot portion,
The plurality of slot coil portions are insulated from the adjacent slot coil portions by an insulating member,
The stator core is composed of a plurality of laminated electromagnetic steel plates, has a fastening portion that projects radially outward, and has an insertion hole through which the fastening member is inserted,
The case has an abutting portion that is in contact with the stator core and has a fastening hole for fastening the fastening member,
A rotating electrical machine in which the stator is fixed to the case by the fastening member being inserted through the insertion hole of the stator core and fastened to the fastening hole of the case,
An outer peripheral edge of the fastening portion of the first electromagnetic steel sheet, which is in contact with the case among the plurality of electromagnetic steel sheets, is radially inner than an outer peripheral edge of the fastening portion of the second electromagnetic steel sheet adjacent to the first electromagnetic steel sheet. Is formed.

また、本発明は、
複数のスロット部を有する略円環形状のステータコアと、前記ステータコアに取り付けられるコイルと、を有するステータと、
前記ステータコアよりも線膨張係数が高い材料で形成されたケースと、
前記ステータを前記ケースに固定する締結部材と、を備え、
前記コイルは、前記スロット部に挿入された複数のスロットコイル部を有し、
前記複数のスロットコイル部は、絶縁部材によって隣接する前記スロットコイル部と絶縁されており、
前記ステータコアは、積層された複数の電磁鋼板から構成され、径方向外側に突出し、前記締結部材が挿通する挿通孔が形成された締結部を有し、
前記ケースは、前記ステータコアと当接し、前記締結部材が締結される締結孔が形成された当接部を有し、
前記締結部材が、前記ステータコアの前記挿通孔を挿通し、前記ケースの前記締結孔に締結されることによって、前記ステータが前記ケースに固定された回転電機であって、
前記ケースの前記当接部は、前記複数の電磁鋼板のうち、前記ケースと当接する第1電磁鋼板の前記締結部の外周縁、及び前記第1電磁鋼板と隣接する第2電磁鋼板の前記締結部の外周縁よりも径方向内側に形成される。
Further, the present invention is
A stator having a substantially annular stator core having a plurality of slot portions and a coil attached to the stator core;
A case formed of a material having a higher linear expansion coefficient than the stator core;
A fastening member for fixing the stator to the case,
The coil has a plurality of slot coil portions inserted into the slot portion,
The plurality of slot coil portions are insulated from the adjacent slot coil portions by an insulating member,
The stator core is composed of a plurality of laminated electromagnetic steel plates, has a fastening portion that projects radially outward, and has an insertion hole through which the fastening member is inserted,
The case has an abutting portion that is in contact with the stator core and has a fastening hole for fastening the fastening member,
A rotating electrical machine in which the stator is fixed to the case by the fastening member being inserted through the insertion hole of the stator core and fastened to the fastening hole of the case,
The abutting portion of the case includes, among the plurality of electromagnetic steel sheets, an outer peripheral edge of the fastening portion of the first electromagnetic steel sheet that abuts the case, and the fastening of the second electromagnetic steel sheet adjacent to the first electromagnetic steel sheet. It is formed radially inward of the outer peripheral edge of the portion.

本発明によれば、回転電機が、温度上昇後、常温に戻る際、第1電磁鋼板は第2電磁鋼板に引っ掛かることなく元の位置に戻ることができるので、第1電磁鋼板によって絶縁部材が損傷し、コイルが短絡することを防止できる。 According to the present invention, when the rotating electrical machine returns to room temperature after the temperature rises, the first electromagnetic steel sheet can return to the original position without being caught by the second electromagnetic steel sheet, so that the first electromagnetic steel sheet serves as an insulating member. It can prevent damage and short circuit of the coil.

本発明の第1実施形態の回転電機をロータシャフトの軸線方向から見た図である。It is the figure which looked at the rotary electric machine of a 1st embodiment of the present invention from the direction of an axis of a rotor shaft. ロータコアの形状を斜め上から見た要部拡大図である。FIG. 4 is an enlarged view of a main part of the rotor core seen from diagonally above. 図1のA−A断面図である。It is an AA sectional view of FIG. 図3のエリアERの拡大図である。FIG. 4 is an enlarged view of an area ER in FIG. 3. 第1電磁鋼板及び第2電磁鋼板の締結部の外周縁を説明する説明図である。It is explanatory drawing explaining the outer periphery of the fastening part of a 1st electromagnetic steel plate and a 2nd electromagnetic steel plate. 回転電機の温度変化による、ステータコア及びケースの動作を説明する説明図である。It is explanatory drawing explaining operation|movement of a stator core and a case by temperature change of a rotary electric machine. 第2実施形態の回転電機に係る構造を説明する説明図である。It is explanatory drawing explaining the structure which concerns on the rotary electric machine of 2nd Embodiment. 第2実施形態における回転電機の温度変化による、ステータコア及びケースの動作を説明する説明図である。It is explanatory drawing explaining the operation|movement of a stator core and a case by the temperature change of the rotary electric machine in 2nd Embodiment. 課題を説明する説明図である。It is explanatory drawing explaining a subject.

以下、本発明の回転電機の各実施形態を、添付図面に基づいて説明する。本発明の回転電機は、少なくとも発電用及び駆動用の回転電機を含む。 Hereinafter, each embodiment of the rotating electric machine of the present invention will be described with reference to the accompanying drawings. The rotating electric machine of the present invention includes at least a rotating electric machine for power generation and for driving.

[第1実施形態]
先ず、本発明の第1実施形態の回転電機1について図1〜図6を参照しながら説明する。添付図面では見易さのために、複数存在する同一属性の部位には、一部のみしか参照符号が付されていない場合がある。また、同一の形状、構造等である場合は図面を解りやすくするため、それぞれ同符号をつけている場合がある。
[First Embodiment]
First, the rotary electric machine 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6. In the accompanying drawings, for ease of viewing, a plurality of parts having the same attribute may be given only a part of reference numerals. Further, when the shapes and structures are the same, the same reference numerals may be given to the drawings to facilitate understanding of the drawings.

<回転電機の構成>
図1に示すように、回転電機1は、ロータ3及びステータ5と、ケース9と、を備えている。
<Structure of rotating electric machine>
As shown in FIG. 1, the rotary electric machine 1 includes a rotor 3, a stator 5, and a case 9.

ロータ3はロータシャフト2を有している。ロータシャフト2の中心には、中心軸Cがある。この中心軸Cはロータシャフト2と平行であり3次元空間に定義される直線である。図1は中心軸Cを軸方向から見た図であり中心軸Cが点に見えている状態である。 The rotor 3 has a rotor shaft 2. At the center of the rotor shaft 2 is a central axis C. The central axis C is a straight line parallel to the rotor shaft 2 and defined in the three-dimensional space. FIG. 1 is a view of the central axis C seen from the axial direction, in which the central axis C is seen as a point.

本実施形態において、径方向外側という場合は、中心軸Cが点に見えている状態で、この点を中心として円を描いて点から円へ向かう方向をいう。また、径方向内側という場合は、中心軸Cが点に見えている状態で、この点を中心として円を描いて円から点へ向かう方向をいう。さらに、周方向というときは円に沿った方向をいう。 In the present embodiment, the term “outer in the radial direction” refers to a direction from a point to a circle, with the center axis C being viewed as a point and drawing a circle around this point. Further, the term “inward in the radial direction” refers to a direction from a circle to a point drawn with a circle with the central axis C being seen as a point. Furthermore, the term "circumferential direction" means a direction along a circle.

ステータ5は、略円環形状のステータコア6と、ステータコア6に取り付けられるコイル7と、を有する。ステータ5は、締結部材8によってケース9に固定されている。締結部材8は、例えばボルトである。 The stator 5 has a substantially annular stator core 6 and a coil 7 attached to the stator core 6. The stator 5 is fixed to the case 9 by a fastening member 8. The fastening member 8 is, for example, a bolt.

図2に示すように、ステータコア6は、複数の電磁鋼板10が軸方向に積層されて構成されている。電磁鋼板10は、表面が樹脂でコーティングされている。 As shown in FIG. 2, the stator core 6 is configured by stacking a plurality of electromagnetic steel plates 10 in the axial direction. The surface of the electromagnetic steel sheet 10 is coated with resin.

ステータコア6は、略円環形状のヨーク部20と、ヨーク部20の内周縁21から径方向内側に突出して形成され、周方向に環状に配置された複数のティース部30と、ヨーク部20の外周縁22から径方向外側に突出し、締結部材8が挿通する挿通孔41が形成された複数の締結部40と、を有する。本実施形態では、締結部40は、6個形成されている。 The stator core 6 includes a yoke portion 20 having a substantially annular shape, a plurality of teeth portions 30 that are formed to project radially inward from an inner peripheral edge 21 of the yoke portion 20, and are annularly arranged in the circumferential direction, and the yoke portion 20. And a plurality of fastening portions 40 that project radially outward from the outer peripheral edge 22 and in which insertion holes 41 through which the fastening members 8 are inserted are formed. In this embodiment, six fastening portions 40 are formed.

ティース部30の先端には、周方向両側に突出する2つの鍔部31が形成されている。ティース部30間には、底壁面33、第1側壁面35、第2側壁面37によって囲まれたスロット部39が形成されている。スロット部39には、コイル7が収容される。 Two collar portions 31 projecting to both sides in the circumferential direction are formed at the tips of the tooth portions 30. A slot portion 39 surrounded by the bottom wall surface 33, the first side wall surface 35, and the second side wall surface 37 is formed between the tooth portions 30. The coil 7 is accommodated in the slot portion 39.

図3及び図4に示すように、コイル7は、ステータコア6のスロット部39に径方向に積層して挿入された複数のスロットコイル部7Aを有し、複数のスロットコイル部7Aは、絶縁部材7Bによって隣接するスロットコイル部7Aと絶縁されている。なお、各スロットコイル部7Aの長手方向は、中心軸Cと略平行であり略等間隔に配置されている。 As shown in FIGS. 3 and 4, the coil 7 has a plurality of slot coil portions 7A that are inserted in the slot portions 39 of the stator core 6 in a radially laminated manner. The plurality of slot coil portions 7A are made of insulating material. It is insulated from the adjacent slot coil portion 7A by 7B. The longitudinal direction of each slot coil portion 7A is substantially parallel to the central axis C and arranged at substantially equal intervals.

絶縁部材7Bは、例えば絶縁紙である。これにより、スロットコイル部7Aの製造が容易となる。 The insulating member 7B is, for example, insulating paper. This facilitates the manufacture of the slot coil portion 7A.

ケース9は、ステータコア6と当接し、締結部材8が締結される締結孔91が形成された当接部90を有する。ステータコア6は、締結部40がケース9の当接部90と軸方向で当接するように配置されている。締結部材8が、電磁鋼板10の締結部40に形成された挿通孔41を挿通し、ケース9の当接部90に形成された締結孔91に締結されることによって、ステータ5がケース9に固定されている。 The case 9 has a contact portion 90 that is in contact with the stator core 6 and has a fastening hole 91 for fastening the fastening member 8. The stator core 6 is arranged such that the fastening portion 40 is in axial contact with the contact portion 90 of the case 9. The fastening member 8 is inserted through the insertion hole 41 formed in the fastening portion 40 of the electromagnetic steel plate 10 and fastened in the fastening hole 91 formed in the contact portion 90 of the case 9, whereby the stator 5 is attached to the case 9. It is fixed.

ケース9は、ステータコア6を構成する電磁鋼板10よりも線膨張係数が高い材料で形成されている。ケース9の材料は、例えばアルミニウムである。なお、線膨張係数とは温度上昇による物体の長さや体積が膨張する割合を温度当たりで示したものをいう。 The case 9 is made of a material having a linear expansion coefficient higher than that of the electromagnetic steel plate 10 forming the stator core 6. The material of the case 9 is, for example, aluminum. The linear expansion coefficient refers to the rate of expansion of the length or volume of an object due to temperature rise per temperature.

ステータコア6を構成する電磁鋼板10は、ケース9の当接部90と軸方向で当接する第1電磁鋼板10Aと、第1電磁鋼板10Aと隣接する第2電磁鋼板10Bと、を有する。第1電磁鋼板10Aと隣接する第2電磁鋼板10Bを含む電磁鋼板10は、全て同材料で形成されており、形状のみが異なる。本実施形態では、第1電磁鋼板10A以外の電磁鋼板10(第2電磁鋼板10Bを含む)は、同一形状となっている。 The electromagnetic steel plate 10 that constitutes the stator core 6 has a first electromagnetic steel plate 10A that axially contacts the contact portion 90 of the case 9, and a second electromagnetic steel plate 10B that is adjacent to the first electromagnetic steel plate 10A. The electromagnetic steel sheets 10 including the first electromagnetic steel sheet 10A and the adjacent second electromagnetic steel sheet 10B are all made of the same material and differ only in shape. In the present embodiment, the electromagnetic steel plates 10 (including the second electromagnetic steel plate 10B) other than the first electromagnetic steel plate 10A have the same shape.

図4及び図5に示すように、ケース9の当接部90と当接する第1電磁鋼板10Aの締結部40Aの外周縁42Aは、第1電磁鋼板10Aと隣接する第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向内側となるように形成されている。 As shown in FIGS. 4 and 5, the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel sheet 10A that abuts the abutting portion 90 of the case 9 is fastened to the second electromagnetic steel sheet 10B adjacent to the first electromagnetic steel sheet 10A. It is formed to be radially inward of the outer peripheral edge 42B of the portion 40B.

図6を参照して、回転電機1の温度変化によるステータコア6及びケース9の動作を詳しく説明する。 The operation of the stator core 6 and the case 9 due to the temperature change of the rotary electric machine 1 will be described in detail with reference to FIG.

図6(a)〜(d)に示すように、ステータコア6は、締結部材8の軸力ARによって、ケース9の当接部90に固定されている。締結部材8の軸力ARは、中心軸Cと平行な方向の力である。 As shown in FIGS. 6A to 6D, the stator core 6 is fixed to the contact portion 90 of the case 9 by the axial force AR of the fastening member 8. The axial force AR of the fastening member 8 is a force in a direction parallel to the central axis C.

始めに、図6(a)に示すように、ケース9の当接部90と当接する第1電磁鋼板10Aの締結部40Aの外周縁42Aは、第1電磁鋼板10Aと隣接する第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向内側となるように形成されている。さらに、第1電磁鋼板10Aの締結部40Aの外周縁42Aは、ケース9の当接部90の端部93より径方向内側となるように形成されている。本実施形態では、第1電磁鋼板10A以外の電磁鋼板10(第2電磁鋼板10Bを含む)の締結部40の外周縁42と、ケース9の当接部90の端部93は径方向で同一の位置となっている。このとき、回転電機1の温度は、常温(例えば、摂氏20度)である。 First, as shown in FIG. 6A, the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel sheet 10A that abuts the abutting portion 90 of the case 9 is the second electromagnetic steel sheet adjacent to the first electromagnetic steel sheet 10A. It is formed to be radially inward of the outer peripheral edge 42B of the fastening portion 40B of 10B. Further, the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel plate 10A is formed to be radially inward of the end 93 of the abutting portion 90 of the case 9. In the present embodiment, the outer peripheral edge 42 of the fastening portion 40 of the electromagnetic steel sheet 10 (including the second electromagnetic steel sheet 10B) other than the first electromagnetic steel sheet 10A and the end portion 93 of the contact portion 90 of the case 9 are the same in the radial direction. The position is. At this time, the temperature of the rotary electric machine 1 is normal temperature (for example, 20 degrees Celsius).

次に、図6(b)に示すように、回転電機1が高負荷状態になると、回転電機1は、温度が上昇し、高温(例えば、摂氏150度)となる。すると、ケース9及びステータコア6を構成する電磁鋼板10は、ともに熱膨張するが、線膨張係数の大きいケース9の当接部90の方が、電磁鋼板10よりも大きく膨張する。 Next, as shown in FIG. 6B, when the rotary electric machine 1 enters a high load state, the temperature of the rotary electric machine 1 rises to a high temperature (for example, 150 degrees Celsius). Then, both the case 9 and the electromagnetic steel plate 10 forming the stator core 6 thermally expand, but the contact portion 90 of the case 9 having a large linear expansion coefficient expands more than the electromagnetic steel plate 10.

このとき、ケース9の当接部90と第1電磁鋼板10Aとの摩擦係数、すなわちアルミニウムと樹脂との摩擦係数は、第1電磁鋼板10Aと第2電磁鋼板10Bとの摩擦係数、すなわち樹脂と樹脂との摩擦係数より大きいため、第1電磁鋼板10Aは、ケース9の当接部90との摩擦力によって径方向外側に引っ張られる。しかし、第1電磁鋼板10Aの締結部40Aの外周縁42Aは、径方向外側へと変位するが、第2電磁鋼板10Bの外周縁42Bよりも径方向内側であるので、第2電磁鋼板10Bの外周縁42Bの径方向外側には突出しない。これにより、第1電磁鋼板10Aは、締結部材8の軸力ARによって、外周縁42Aが第2電磁鋼板10B側に反るような変形は生じない。 At this time, the friction coefficient between the contact portion 90 of the case 9 and the first electromagnetic steel plate 10A, that is, the friction coefficient between aluminum and the resin is the friction coefficient between the first electromagnetic steel plate 10A and the second electromagnetic steel plate 10B, that is, the resin. Since the friction coefficient with the resin is larger than the friction coefficient with the resin, the first electromagnetic steel plate 10A is pulled outward in the radial direction by the frictional force with the contact portion 90 of the case 9. However, the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel sheet 10A is displaced radially outward, but is radially inner than the outer peripheral edge 42B of the second electromagnetic steel sheet 10B. It does not project radially outward of the outer peripheral edge 42B. As a result, the first electromagnetic steel sheet 10A is not deformed by the axial force AR of the fastening member 8 such that the outer peripheral edge 42A warps toward the second electromagnetic steel sheet 10B side.

ここで摩擦係数とは、互いに接触する二つの物体の接触面の滑りにくさを示す係数であり、摩擦係数が大きいほど互いに接触する二つの物体の接触面は滑りにくい。 Here, the coefficient of friction is a coefficient indicating the slipperiness of the contact surfaces of two objects in contact with each other. The larger the coefficient of friction, the less likely the contact surfaces of two objects in contact with each other are.

次に、図6(c)に示すように、回転電機1が高負荷状態から低負荷状態または無負荷状態になると、回転電機1は、温度が低下する。すると、ケース9及びステータコア6を構成する電磁鋼板10は、ともに収縮するが、線膨張係数の大きいケース9の当接部90の方が、電磁鋼板10よりも収縮する。 Next, as shown in FIG. 6C, when the rotary electric machine 1 changes from the high load state to the low load state or the no load state, the temperature of the rotary electric machine 1 decreases. Then, both the case 9 and the electromagnetic steel plate 10 forming the stator core 6 contract, but the contact portion 90 of the case 9 having a large linear expansion coefficient contracts more than the electromagnetic steel plate 10.

このとき、ケース9の当接部90と第1電磁鋼板10Aとの摩擦係数は、第1電磁鋼板10Aと第2電磁鋼板10Bとの摩擦係数より大きいため、第1電磁鋼板10Aは、ケース9の当接部90との摩擦力によって径方向内側に引っ張られる。さらに、第1電磁鋼板10Aは、第2電磁鋼板10B側に反っていないので、第2電磁鋼板10Bに引っ掛かることなく、ケース9の当接部90との摩擦力によって径方向内側に引っ張られる。 At this time, the friction coefficient between the contact portion 90 of the case 9 and the first electromagnetic steel sheet 10A is larger than the friction coefficient between the first electromagnetic steel sheet 10A and the second electromagnetic steel sheet 10B. It is pulled inward in the radial direction by the frictional force with the contact portion 90. Furthermore, since the first electromagnetic steel plate 10A is not warped to the second electromagnetic steel plate 10B side, it is pulled inward in the radial direction by the frictional force with the contact portion 90 of the case 9 without being caught by the second electromagnetic steel plate 10B.

この結果、図6(d)に示すように、回転電機1の温度が低下し常温に戻ったとき、ケース9及びステータコア6を構成する電磁鋼板10は、ともに収縮し、第1電磁鋼板10Aは、第2電磁鋼板10Bに引っ掛かることなく、図6(a)と同じ位置に戻る。 As a result, as shown in FIG. 6D, when the temperature of the rotary electric machine 1 decreases and returns to room temperature, the electromagnetic steel plates 10 forming the case 9 and the stator core 6 shrink together, and the first electromagnetic steel plate 10A , And returns to the same position as in FIG. 6A without being caught by the second electromagnetic steel plate 10B.

なお、図6(a)〜(d)の過程において、ケース9の当接部90と第1電磁鋼板10Aとの摩擦係数、すなわちアルミニウムと樹脂との摩擦係数は、第1電磁鋼板10Aと第2電磁鋼板10Bとの摩擦係数、すなわち樹脂と樹脂との摩擦係数より大きいため、ケース9の当接部90と第1電磁鋼板10Aとは、ほぼ滑りが生じない。 In the process of FIGS. 6A to 6D, the friction coefficient between the contact portion 90 of the case 9 and the first electromagnetic steel plate 10A, that is, the friction coefficient between aluminum and resin is the same as that of the first electromagnetic steel plate 10A. Since the friction coefficient with the second electromagnetic steel sheet 10B, that is, the coefficient of friction between the resins is larger than that of the resin, the contact portion 90 of the case 9 and the first electromagnetic steel sheet 10A hardly slip.

このように、ケース9の当接部90と当接する第1電磁鋼板10Aの締結部40Aの外周縁42Aは、第1電磁鋼板10Aと隣接する第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向内側となるように形成されているので、回転電機1の温度上昇によって、ケース9がステータコア6よりも膨張し、第1電磁鋼板10Aがケース9の当接部90との摩擦力によって径方向外側に引っ張られた場合でも、第1電磁鋼板10Aの締結部40Aは、第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向外側に突出しない。 As described above, the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel sheet 10A that abuts the abutting portion 90 of the case 9 has the outer peripheral edge 42B of the fastening portion 40B of the second electromagnetic steel sheet 10B that is adjacent to the first electromagnetic steel sheet 10A. Since it is formed so as to be on the inner side in the radial direction, the case 9 expands more than the stator core 6 due to the temperature rise of the rotary electric machine 1, and the first electromagnetic steel plate 10A causes the frictional force with the contact portion 90 of the case 9. Even if the fastening portion 40A of the first electromagnetic steel sheet 10A is pulled outward in the radial direction by the, the fastening portion 40A of the first electromagnetic steel sheet 10B does not project radially outward than the outer peripheral edge 42B of the fastening portion 40B of the second electromagnetic steel sheet 10B.

したがって、第1電磁鋼板10Aの締結部40Aの外周縁42Aは、締結部材8の軸力ARによって第2電磁鋼板10B側に反るような変形は生じないので、回転電機1が温度上昇後に常温に戻る際、第1電磁鋼板10Aは第2電磁鋼板10Bに引っ掛かることなく元の位置に戻ることができる。これにより、回転電機1が温度上昇後に常温に戻った場合でも、第1電磁鋼板10Aが元の位置まで戻らないことに起因して、第1電磁鋼板10Aのティース部30の鍔部31によって絶縁部材7Bが損傷することを防止でき、コイル7が短絡することを防止できる。 Therefore, since the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel plate 10A is not deformed to warp toward the second electromagnetic steel plate 10B side due to the axial force AR of the fastening member 8, the rotary electric machine 1 is kept at room temperature after the temperature rises. When returning to, the first electromagnetic steel sheet 10A can return to the original position without being caught by the second electromagnetic steel sheet 10B. As a result, even if the rotary electric machine 1 returns to room temperature after the temperature rises, the first electromagnetic steel sheet 10A does not return to its original position, and therefore the insulation is performed by the collar portion 31 of the tooth portion 30 of the first electromagnetic steel sheet 10A. The member 7B can be prevented from being damaged, and the coil 7 can be prevented from being short-circuited.

また、第1電磁鋼板10Aの締結部40Aより径方向内側の形状、すなわち第1電磁鋼板10Aのヨーク部20及びティース部30の形状は、他の電磁鋼板10(第2電磁鋼板10Bを含む)と同一形状である。したがって、回転電機1の駆動によって第1電磁鋼板10Aに生じる磁束は、他の電磁鋼板10(第2電磁鋼板10Bを含む)に生じる磁束と変わらないので、回転電機1の出力トルクの低下を防止できる。 Further, the shape of the first electromagnetic steel plate 10A on the inner side in the radial direction of the fastening portion 40A, that is, the shapes of the yoke portion 20 and the teeth portion 30 of the first electromagnetic steel sheet 10A are other electromagnetic steel sheets 10 (including the second electromagnetic steel sheet 10B). It has the same shape as. Therefore, since the magnetic flux generated in the first electromagnetic steel plate 10A by driving the rotating electric machine 1 is the same as the magnetic flux generated in the other electromagnetic steel plates 10 (including the second electromagnetic steel plate 10B), the decrease of the output torque of the rotating electric machine 1 is prevented. it can.

本実施形態では、絶縁部材7Bは絶縁紙であるとしたが、絶縁部材7Bは、スロットコイル部7Aの外周面に被膜された絶縁被膜であってもよい。これにより、複数のスロットコイル部7Aをスロット部39に挿入する作業を容易化できる。 In the present embodiment, the insulating member 7B is made of insulating paper, but the insulating member 7B may be an insulating coating film coated on the outer peripheral surface of the slot coil portion 7A. Thereby, the work of inserting the plurality of slot coil portions 7A into the slot portions 39 can be facilitated.

[第2実施形態]
続いて、本発明の第2実施形態の回転電機1Aについて図7及び図8を参照しながら説明する。なお、以下の説明において、第1実施形態の回転電機1と同一の構成要素については同一の符号を付して説明を省略又は簡略化する。第1実施形態の回転電機1のステータコア6を構成する電磁鋼板10は、ケース9の当接部90と当接するケース9の当接部90と軸方向で当接する第1電磁鋼板10Aのみ他の電磁鋼板10と異なる形状を有していたが、第2実施形態の回転電機1Aのステータコア6を構成する電磁鋼板10は、第1電磁鋼板10A及び第2電磁鋼板10Bを含む全ての電磁鋼板10が同一形状となっている。以下、第1実施形態の回転電機1と第2実施形態の回転電機1Aとの相違点について詳細に説明する。
[Second Embodiment]
Subsequently, a rotating electric machine 1A according to a second embodiment of the present invention will be described with reference to FIGS. 7 and 8. In the following description, the same components as those of the rotary electric machine 1 according to the first embodiment are designated by the same reference numerals, and the description will be omitted or simplified. The electromagnetic steel sheet 10 that constitutes the stator core 6 of the rotating electrical machine 1 of the first embodiment is configured such that only the first electromagnetic steel sheet 10A that axially contacts the contact portion 90 of the case 9 that contacts the contact portion 90 of the case 9. Although it has a shape different from that of the electromagnetic steel sheet 10, the electromagnetic steel sheet 10 that constitutes the stator core 6 of the rotating electric machine 1A of the second embodiment includes all the electromagnetic steel sheets 10 including the first electromagnetic steel sheet 10A and the second electromagnetic steel sheet 10B. Have the same shape. Hereinafter, differences between the rotary electric machine 1 of the first embodiment and the rotary electric machine 1A of the second embodiment will be described in detail.

図7に示すように、第2実施形態の回転電機1Aのステータコア6を構成する電磁鋼板10による締結部40の外周縁42は、径方向で単一面を形成している。 As shown in FIG. 7, the outer peripheral edge 42 of the fastening portion 40 formed of the electromagnetic steel plate 10 that constitutes the stator core 6 of the rotating electrical machine 1A of the second embodiment forms a single surface in the radial direction.

回転電機1Aのケース9は、ステータコア6と当接し、締結部材8が締結される締結孔91が形成された当接部90Aを有する。 The case 9 of the rotating electric machine 1A has a contact portion 90A that is in contact with the stator core 6 and has a fastening hole 91 for fastening the fastening member 8.

本実施形態では、ケース9の当接部90Aは、ステータコア6を構成する電磁鋼板10のうち、ケース9の当接部90Aと当接する第1電磁鋼板10Aの締結部40Aの外周縁42Aよりも径方向内側となるように形成されている。 In the present embodiment, the abutting portion 90A of the case 9 is less than the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel plate 10A that abuts the abutting portion 90A of the case 9 among the electromagnetic steel plates 10 that form the stator core 6. It is formed so as to be radially inward.

図8を参照して、回転電機1Aの温度変化によるステータコア6及びケース9の動作を説明する。 The operation of the stator core 6 and the case 9 due to the temperature change of the rotary electric machine 1A will be described with reference to FIG.

図8(a)〜(d)に示すように、ステータコア6は、締結部材8の軸力ARによって、ケース9の当接部90Aに固定されている。締結部材8の軸力ARは、中心軸Cと平行な方向の力である。 As shown in FIGS. 8A to 8D, the stator core 6 is fixed to the contact portion 90A of the case 9 by the axial force AR of the fastening member 8. The axial force AR of the fastening member 8 is a force in a direction parallel to the central axis C.

始めに、図8(a)に示すように、ケース9の当接部90Aの端部93Aは、ケース9の当接部90Aと当接する第1電磁鋼板10Aの締結部40Aの外周縁42A、及び第1電磁鋼板10Aと隣接する第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向内側となるように形成されている。このとき、回転電機1Aの温度は、常温(例えば、摂氏20度)である。 First, as shown in FIG. 8A, the end portion 93A of the contact portion 90A of the case 9 has an outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel plate 10A that contacts the contact portion 90A of the case 9, Also, the first electromagnetic steel plate 10A and the second electromagnetic steel plate 10B adjacent to the first electromagnetic steel plate 10B are formed so as to be radially inward of the outer peripheral edge 42B of the fastening portion 40B. At this time, the temperature of the rotary electric machine 1A is room temperature (for example, 20 degrees Celsius).

次に、図8(b)に示すように、回転電機1Aが高負荷状態になると、回転電機1Aは、温度が上昇し、高温(例えば、摂氏150度)となる。すると、ケース9及びステータコア6を構成する電磁鋼板10は、ともに熱膨張するが、線膨張係数の大きいケース9の当接部90Aの方が、電磁鋼板10よりも大きく膨張する。 Next, as shown in FIG. 8B, when the rotary electric machine 1A is in a high load state, the temperature of the rotary electric machine 1A rises to a high temperature (for example, 150 degrees Celsius). Then, both the case 9 and the electromagnetic steel plate 10 forming the stator core 6 thermally expand, but the contact portion 90A of the case 9 having a large linear expansion coefficient expands more than the electromagnetic steel plate 10.

このとき、ケース9の当接部90Aと第1電磁鋼板10Aとの摩擦係数、すなわちアルミニウムと樹脂との摩擦係数は、第1電磁鋼板10Aと第2電磁鋼板10Bとの摩擦係数、すなわち樹脂と樹脂との摩擦係数より大きいため、第1電磁鋼板10Aは、ケース9の当接部90Aとの摩擦力によって径方向外側に引っ張られる。この結果、第1電磁鋼板10Aの締結部40Aの外周縁42Aは、第1電磁鋼板10Aと隣接する第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向外側に突出する。一方、ケース9の当接部90Aの端部93Aは、第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向外側には突出しない。 At this time, the friction coefficient between the contact portion 90A of the case 9 and the first electromagnetic steel sheet 10A, that is, the friction coefficient between aluminum and the resin is the friction coefficient between the first electromagnetic steel sheet 10A and the second electromagnetic steel sheet 10B, that is, the resin. Since the coefficient of friction with the resin is larger than the coefficient of friction with the resin, the first electromagnetic steel sheet 10A is pulled outward in the radial direction by the frictional force with the contact portion 90A of the case 9. As a result, the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel sheet 10A protrudes radially outward from the outer peripheral edge 42B of the fastening portion 40B of the second electromagnetic steel sheet 10B adjacent to the first electromagnetic steel sheet 10A. On the other hand, the end portion 93A of the contact portion 90A of the case 9 does not protrude radially outward from the outer peripheral edge 42B of the fastening portion 40B of the second electromagnetic steel plate 10B.

したがって、第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向外側に突出した第1電磁鋼板10Aの締結部40Aの突出部45Aは、ケース9の当接部90A及び第2電磁鋼板10Bのいずれとも当接しない。よって、第1電磁鋼板10Aの締結部40Aの突出部45Aは、ケース9の当接部90Aからの締結部材8の軸力ARに起因した荷重の入力がない。これにより、第1電磁鋼板10Aの締結部40Aの突出部45Aが第2電磁鋼板10B側に反るような変形は生じない。 Therefore, the protruding portion 45A of the fastening portion 40A of the first electromagnetic steel sheet 10A, which projects radially outward from the outer peripheral edge 42B of the fastening portion 40B of the second electromagnetic steel sheet 10B, includes the contact portion 90A of the case 9 and the second electromagnetic steel sheet. It does not contact with any of 10B. Therefore, the protrusion 45A of the fastening portion 40A of the first electromagnetic steel plate 10A does not receive a load due to the axial force AR of the fastening member 8 from the contact portion 90A of the case 9. As a result, the protrusion 45A of the fastening portion 40A of the first electromagnetic steel plate 10A does not deform such that the protrusion 45A warps toward the second electromagnetic steel plate 10B.

次に、図8(c)に示すように、回転電機1Aが高負荷状態から低負荷状態または無負荷状態になると、回転電機1Aは、温度が低下する。すると、ケース9及びステータコア6を構成する電磁鋼板10は、ともに収縮するが、線膨張係数の大きいケース9の当接部90Aの方が、電磁鋼板10よりも収縮する。 Next, as shown in FIG. 8C, when the rotary electric machine 1A changes from the high load state to the low load state or the no load state, the temperature of the rotary electric machine 1A decreases. Then, both the case 9 and the electromagnetic steel plate 10 forming the stator core 6 contract, but the contact portion 90A of the case 9 having a large linear expansion coefficient contracts more than the electromagnetic steel plate 10.

このとき、ケース9の当接部90Aと第1電磁鋼板10Aとの摩擦係数は、第1電磁鋼板10Aと第2電磁鋼板10Bとの摩擦係数より大きいため、第1電磁鋼板10Aは、ケース9の当接部90Aとの摩擦力によって径方向内側に引っ張られる。さらに、第1電磁鋼板10Aは、第2電磁鋼板10B側に反っていないので、第2電磁鋼板10Bに引っ掛かることなく、ケース9の当接部90Aとの摩擦力によって径方向内側に引っ張られる。 At this time, the friction coefficient between the contact portion 90A of the case 9 and the first electromagnetic steel sheet 10A is larger than the friction coefficient between the first electromagnetic steel sheet 10A and the second electromagnetic steel sheet 10B. Is pulled inward in the radial direction by the frictional force with the contact portion 90A. Further, since the first electromagnetic steel plate 10A is not warped to the second electromagnetic steel plate 10B side, it is pulled inward in the radial direction by the frictional force with the contact portion 90A of the case 9 without being caught by the second electromagnetic steel plate 10B.

この結果、図8(d)に示すように、回転電機1Aの温度が低下し常温に戻ったとき、ケース9及びステータコア6を構成する電磁鋼板は、ともに収縮し、第1電磁鋼板10Aは、第2電磁鋼板10Bに引っ掛かることなく、図8(a)と同じ位置に戻る。 As a result, as shown in FIG. 8D, when the temperature of the rotary electric machine 1A decreases and returns to room temperature, the electromagnetic steel plates forming the case 9 and the stator core 6 both shrink, and the first electromagnetic steel plate 10A: It returns to the same position as FIG.8(a), without being caught in the 2nd electromagnetic steel plate 10B.

なお、図8(a)〜(d)の過程において、ケース9の当接部90Aと第1電磁鋼板10Aとの摩擦係数、すなわちアルミニウムと樹脂との摩擦係数は、第1電磁鋼板10Aと第2電磁鋼板10Bとの摩擦係数、すなわち樹脂と樹脂との摩擦係数より大きいため、ケース9の当接部90Aと第1電磁鋼板10Aとは、ほぼ滑りが生じない。 In the process of FIGS. 8A to 8D, the friction coefficient between the contact portion 90A of the case 9 and the first electromagnetic steel plate 10A, that is, the friction coefficient between aluminum and resin is the same as that of the first electromagnetic steel plate 10A. Since the friction coefficient with the second electromagnetic steel sheet 10B, that is, the friction coefficient between the resins is larger than that of the resin, the contact portion 90A of the case 9 and the first electromagnetic steel sheet 10A do not substantially slip.

このように、ケース9の当接部90Aは、ケース9の当接部90Aと当接する第1電磁鋼板10Aの締結部40Aの外周縁42A、及び第1電磁鋼板10Aと隣接する第2電磁鋼板10Bの締結部40Bの外周縁42Bよりも径方向内側に形成されているので、回転電機1Aの温度上昇によって、ケース9がステータコア6よりも膨張し、第1電磁鋼板10Aがケース9の当接部90Aとの摩擦力によって径方向外側に引っ張られた場合でも、第1電磁鋼板10Aの締結部40Aの突出部45Aは、ケース9の当接部90A及び第2電磁鋼板10Bのいずれとも当接しない。 As described above, the contact portion 90A of the case 9 includes the outer peripheral edge 42A of the fastening portion 40A of the first electromagnetic steel sheet 10A that contacts the contact portion 90A of the case 9, and the second electromagnetic steel sheet adjacent to the first electromagnetic steel sheet 10A. Since it is formed radially inward of the outer peripheral edge 42B of the fastening portion 40B of 10B, the case 9 expands more than the stator core 6 due to the temperature rise of the rotating electric machine 1A, and the first electromagnetic steel plate 10A contacts the case 9. Even when pulled outward in the radial direction by the frictional force with the portion 90A, the protrusion 45A of the fastening portion 40A of the first electromagnetic steel sheet 10A abuts both the abutting portion 90A of the case 9 and the second electromagnetic steel sheet 10B. do not do.

したがって、第1電磁鋼板10Aの締結部40Aの突出部45Aは、ケース9の当接部90Aからの締結部材8の軸力ARに起因した荷重の入力がない。よって、第1電磁鋼板10Aの締結部40Aの突出部45Aは、締結部材8の軸力ARの影響を受けず、第2電磁鋼板10B側に反るような変形が生じないので、回転電機1Aが温度上昇後に常温に戻る際、第1電磁鋼板10Aは、第2電磁鋼板10Bに引っ掛かることなく元の位置に戻ることができる。これにより、回転電機1Aの温度変化に伴い、第1電磁鋼板10Aが元の位置まで戻らないことに起因して、第1電磁鋼板10Aのティース部30の鍔部31によって絶縁部材7Bが損傷することを防止でき、コイル7が短絡することを防止できる。 Therefore, the protrusion 45A of the fastening portion 40A of the first electromagnetic steel sheet 10A does not receive a load from the contact portion 90A of the case 9 due to the axial force AR of the fastening member 8. Therefore, the protrusion 45A of the fastening portion 40A of the first electromagnetic steel sheet 10A is not affected by the axial force AR of the fastening member 8 and is not deformed so as to warp toward the second electromagnetic steel sheet 10B side. When the temperature rises to normal temperature after the temperature rises, the first electromagnetic steel sheet 10A can return to the original position without being caught by the second electromagnetic steel sheet 10B. As a result, the insulating member 7B is damaged by the flange portion 31 of the tooth portion 30 of the first electromagnetic steel sheet 10A due to the first electromagnetic steel sheet 10A not returning to its original position due to the temperature change of the rotating electrical machine 1A. This can be prevented and the coil 7 can be prevented from being short-circuited.

また、第1電磁鋼板10Aの形状は、他の電磁鋼板10と同一形状である。したがって、第1電磁鋼板10Aに生じる磁束は、他の電磁鋼板10に生じる磁束と変わらないので、回転電機1Aの出力トルクの低下を防止できる。 Further, the shape of the first electromagnetic steel sheet 10A is the same as that of the other electromagnetic steel sheets 10. Therefore, since the magnetic flux generated in the first electromagnetic steel plate 10A is the same as the magnetic flux generated in the other electromagnetic steel plates 10, it is possible to prevent the output torque of the rotary electric machine 1A from decreasing.

なお、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。 It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. can be appropriately made.

また、本明細書には少なくとも以下の事項が記載されている。なお、括弧内には、上記した実施形態において対応する構成要素等を示しているが、これに限定されるものではない。 In addition, at least the following matters are described in the present specification. It should be noted that, although the constituent elements and the like corresponding to the above-described embodiment are shown in parentheses, the present invention is not limited to this.

(1) 複数のスロット部(スロット部39)を有する略円環形状のステータコア(ステータコア6)と、前記ステータコアに取り付けられるコイル(コイル7)と、を有するステータ(ステータ5)と、
前記ステータコアよりも線膨張係数が高い材料で形成されたケース(ケース9)と、
前記ステータを前記ケースに固定する締結部材(締結部材8)と、を備え、
前記コイルは、前記スロット部に挿入された複数のスロットコイル部(スロットコイル部7A)を有し、
前記複数のスロットコイル部は、絶縁部材(絶縁部材7B)によって隣接する前記スロットコイル部と絶縁されており、
前記ステータコアは、積層された複数の電磁鋼板(電磁鋼板10)から構成され、径方向外側に突出し、前記締結部材が挿通する挿通孔(挿通孔41)が形成された締結部(締結部40)を有し、
前記ケースは、前記ステータコアと当接し、前記締結部材が締結される締結孔(締結孔91)が形成された当接部(当接部90)を有し、
前記締結部材が、前記ステータコアの前記挿通孔を挿通し、前記ケースの前記締結孔に締結されることによって、前記ステータが前記ケースに固定された回転電機(回転電機1)であって、
前記複数の電磁鋼板のうち、前記ケースと当接する第1電磁鋼板(第1電磁鋼板10A)の前記締結部(締結部40A)の外周縁(外周縁42A)は、前記第1電磁鋼板と隣接する第2電磁鋼板(第2電磁鋼板10B)の前記締結部(締結部40B)の外周縁(外周縁42B)よりも径方向内側となるように形成された、回転電機。
(1) A stator (stator 5) having a substantially annular stator core (stator core 6) having a plurality of slot portions (slot portions 39) and a coil (coil 7) attached to the stator core,
A case (case 9) made of a material having a linear expansion coefficient higher than that of the stator core;
A fastening member (fastening member 8) for fixing the stator to the case,
The coil has a plurality of slot coil portions (slot coil portions 7A) inserted in the slot portions,
The plurality of slot coil parts are insulated from the adjacent slot coil parts by an insulating member (insulating member 7B),
The stator core is composed of a plurality of laminated electromagnetic steel plates (electromagnetic steel plates 10), projects outward in the radial direction, and has a fastening portion (fastening portion 40) formed with an insertion hole (insertion hole 41) through which the fastening member is inserted. Have
The case has an abutting portion (abutting portion 90) in which a fastening hole (fastening hole 91) for fastening the fastening member is abutted with the stator core,
A rotary electric machine (rotary electric machine 1) in which the stator is fixed to the case by inserting the fastening member through the insertion hole of the stator core and fastening the fastening hole to the fastening hole of the case,
An outer peripheral edge (outer peripheral edge 42A) of the fastening portion (fastening portion 40A) of the first electromagnetic steel sheet (first electromagnetic steel sheet 10A) that is in contact with the case among the plurality of electromagnetic steel sheets is adjacent to the first electromagnetic steel sheet. A rotating electrical machine formed so as to be radially inward of an outer peripheral edge (outer peripheral edge 42B) of the fastening portion (fastening portion 40B) of the second electromagnetic steel sheet (second electromagnetic steel sheet 10B).

(1)によれば、ケースと当接する第1電磁鋼板の締結部の外周縁は、第1電磁鋼板と隣接する第2電磁鋼板の締結部の外周縁よりも径方向内側となるように形成されているので、回転電機の温度上昇によって、ケースがステータコアよりも膨張し、第1電磁鋼板がケースとの摩擦力によって径方向外側に変形した場合でも、第1電磁鋼板の締結部が、第2電磁鋼板の締結部の外周縁よりも径方向外側に突出しないようにすることができる。したがって、第1電磁鋼板の締結部の外周縁が、締結部材の軸力によって第2電磁鋼板側に反ることを防止できる。これにより、回転電機が温度上昇後に常温に戻る際、第1電磁鋼板は、第2電磁鋼板に引っ掛かることなく元の位置に戻ることができるので、第1電磁鋼板によって絶縁部材が損傷し、コイルが短絡することを防止できる。
また、第1電磁鋼板の締結部より径方向内側は、第2電磁鋼板と同形状とすることができるので、回転電機の出力トルクの低下を防止できる。
According to (1), the outer peripheral edge of the fastening portion of the first electromagnetic steel plate that contacts the case is formed to be radially inner than the outer peripheral edge of the fastening portion of the second electromagnetic steel plate adjacent to the first electromagnetic steel sheet. Therefore, even if the case expands more than the stator core due to the temperature rise of the rotating electric machine and the first electromagnetic steel sheet is deformed radially outward by the frictional force with the case, the fastening portion of the first electromagnetic steel sheet is (2) It is possible not to project outward in the radial direction beyond the outer peripheral edge of the fastening portion of the electromagnetic steel sheet. Therefore, it is possible to prevent the outer peripheral edge of the fastening portion of the first electromagnetic steel plate from warping toward the second electromagnetic steel plate side due to the axial force of the fastening member. Accordingly, when the rotating electrical machine returns to room temperature after the temperature rises, the first electromagnetic steel sheet can return to the original position without being caught by the second electromagnetic steel sheet, so that the insulating member is damaged by the first electromagnetic steel sheet, and the coil Can be prevented from being short-circuited.
Further, the inner side of the fastening portion of the first electromagnetic steel plate in the radial direction can have the same shape as the second electromagnetic steel plate, so that the output torque of the rotating electric machine can be prevented from lowering.

(2) 複数のスロット部(スロット部39)を有する略円環形状のステータコア(ステータコア6)と、前記ステータコアに取り付けられるコイル(コイル7)と、を有するステータ(ステータ5)と、
前記ステータコアよりも線膨張係数が高い材料で形成されたケース(ケース9)と、
前記ステータを前記ケースに固定する締結部材(締結部材8)と、を備え、
前記コイルは、前記スロット部に挿入された複数のスロットコイル部(スロットコイル部7A)を有し、
前記複数のスロットコイル部は、絶縁部材(絶縁部材7B)によって隣接する前記スロットコイル部と絶縁されており、
前記ステータコアは、積層された複数の電磁鋼板(電磁鋼板10)から構成され、径方向外側に突出し、前記締結部材が挿通する挿通孔(挿通孔41)が形成された締結部(締結部40)を有し、
前記ケースは、前記ステータコアと当接し、前記締結部材が締結される締結孔(締結孔91)が形成された当接部(当接部90A)を有し、
前記締結部材が、前記ステータコアの前記挿通孔を挿通し、前記ケースの前記締結孔に締結されることによって、前記ステータが前記ケースに固定された回転電機(回転電機1A)であって、
前記ケースの前記当接部は、前記複数の電磁鋼板のうち、前記ケースと当接する第1電磁鋼板(第1電磁鋼板10A)の前記締結部(締結部40A)の外周縁(外周縁42A)、及び前記第1電磁鋼板と隣接する第2電磁鋼板(第2電磁鋼板10B)の前記締結部(締結部40B)の外周縁(外周縁42B)よりも径方向内側に形成された、回転電機。
(2) A stator (stator 5) having a substantially annular stator core (stator core 6) having a plurality of slot portions (slot portions 39) and a coil (coil 7) attached to the stator core,
A case (case 9) made of a material having a linear expansion coefficient higher than that of the stator core;
A fastening member (fastening member 8) for fixing the stator to the case,
The coil has a plurality of slot coil portions (slot coil portions 7A) inserted in the slot portions,
The plurality of slot coil parts are insulated from the adjacent slot coil parts by an insulating member (insulating member 7B),
The stator core is composed of a plurality of laminated electromagnetic steel plates (electromagnetic steel plates 10), projects outward in the radial direction, and has a fastening portion (fastening portion 40) formed with an insertion hole (insertion hole 41) through which the fastening member is inserted. Have
The case has an abutting portion (abutting portion 90A) that abuts the stator core and has a fastening hole (fastening hole 91) for fastening the fastening member.
A rotating electrical machine (rotating electrical machine 1A) in which the stator is fixed to the case by inserting the fastening member through the insertion hole of the stator core and fastening the fastening member to the fastening hole of the case,
The contact portion of the case has an outer peripheral edge (outer peripheral edge 42A) of the fastening portion (fastening portion 40A) of the first electromagnetic steel sheet (first electromagnetic steel sheet 10A) that contacts the case among the plurality of electromagnetic steel sheets. And a rotating electrical machine formed radially inward of the outer peripheral edge (outer peripheral edge 42B) of the fastening portion (fastening portion 40B) of the second electromagnetic steel sheet (second electromagnetic steel sheet 10B) adjacent to the first electromagnetic steel sheet. ..

(2)によれば、ケースの当接部は、ケースと当接する第1電磁鋼板の締結部の外周縁、及び第1電磁鋼板と隣接する第2電磁鋼板の締結部の外周縁よりも径方向内側となるように形成されている。したがって、回転電機の温度上昇によって、ケースがステータコアよりも膨張し、第1電磁鋼板がケースとの摩擦力によって径方向外側に変形し、第1電磁鋼板の締結部の一部が第2電磁鋼板の締結部の外周縁よりも径方向外側に突出した場合でも、第1電磁鋼板の突出部が、ケースの当接部及び第2電磁鋼板のいずれとも当接しないようにすることができる。よって、第1電磁鋼板の突出部は、締結部材の軸力の影響を受けず、第2電磁鋼板側に反るような変形が生じない。これにより、回転電機が温度上昇後に常温に戻る際、第1電磁鋼板は、第2電磁鋼板に引っ掛かることなく元の位置に戻ることができるので、第1電磁鋼板によって絶縁部材が損傷し、コイルが短絡することを防止できる。 According to (2), the contact portion of the case has a diameter larger than the outer peripheral edge of the fastening portion of the first electromagnetic steel sheet that contacts the case and the outer peripheral edge of the fastening portion of the second electromagnetic steel sheet that is adjacent to the first electromagnetic steel sheet. It is formed to be inside in the direction. Therefore, due to the temperature rise of the rotating electric machine, the case expands more than the stator core, the first electromagnetic steel plate is deformed radially outward by the frictional force with the case, and a part of the fastening portion of the first electromagnetic steel plate is part of the second electromagnetic steel plate. Even when protruding outward in the radial direction from the outer peripheral edge of the fastening portion, the protruding portion of the first electromagnetic steel sheet can be prevented from contacting both the contact portion of the case and the second electromagnetic steel sheet. Therefore, the protruding portion of the first electromagnetic steel plate is not affected by the axial force of the fastening member, and is not deformed so as to warp toward the second electromagnetic steel plate side. Accordingly, when the rotating electrical machine returns to room temperature after the temperature rises, the first electromagnetic steel sheet can return to the original position without being caught by the second electromagnetic steel sheet, so that the insulating member is damaged by the first electromagnetic steel sheet, and the coil Can be prevented from being short-circuited.

(3) (1)または(2)に記載の回転電機であって、前記絶縁部材は、前記スロットコイル部と、隣接する前記スロットコイル部との間に介挿された絶縁紙である、回転電機。 (3) The rotating electric machine according to (1) or (2), wherein the insulating member is an insulating paper interposed between the slot coil section and the adjacent slot coil section. Electric machinery.

(3)によれば、絶縁部材は、スロットコイル部と、隣接するスロットコイル部との間に介挿された絶縁紙であるので、スロットコイル部の製造が容易となる。 According to (3), since the insulating member is the insulating paper interposed between the slot coil portion and the adjacent slot coil portion, the slot coil portion can be easily manufactured.

(4) (1)または(2)に記載の回転電機であって、前記絶縁部材は、前記スロットコイル部の外周面に被膜された絶縁被膜である、回転電機。 (4) The rotary electric machine according to (1) or (2), wherein the insulating member is an insulating coating film coated on an outer peripheral surface of the slot coil portion.

(4)によれば、スロットコイル部の外周面に被膜された絶縁被膜であるので、複数のスロットコイル部をスロットに挿入する作業を容易化できる。 According to (4), since the insulating coating is applied to the outer peripheral surface of the slot coil portion, the work of inserting the plurality of slot coil portions into the slots can be facilitated.

1、1A 回転電機
5 ステータ
6 ステータコア
7 コイル
7A スロットコイル部
7B 絶縁部材
8 締結部材
9 ケース
10 電磁鋼板
10A 第1電磁鋼板
10B 第2電磁鋼板
39 スロット部
40、40A、40B 締結部
41 挿通孔
42、42A、42B 外周縁
90、90A 当接部
91 締結孔
1, 1A Rotating electric machine 5 Stator 6 Stator core 7 Coil 7A Slot coil part 7B Insulation member 8 Fastening member 9 Case 10 Magnetic steel plate 10A First electromagnetic steel plate 10B Second electromagnetic steel plate 39 Slot parts 40, 40A, 40B Fastening part 41 Insertion hole 42 , 42A, 42B Outer peripheral edges 90, 90A Contact portion 91 Fastening hole

Claims (4)

複数のスロット部を有する略円環形状のステータコアと、前記ステータコアに取り付けられるコイルと、を有するステータと、
前記ステータコアよりも線膨張係数が高い材料で形成されたケースと、
前記ステータを前記ケースに固定する締結部材と、を備え、
前記コイルは、前記スロット部に挿入された複数のスロットコイル部を有し、
前記複数のスロットコイル部は、絶縁部材によって隣接する前記スロットコイル部と絶縁されており、
前記ステータコアは、積層された複数の電磁鋼板から構成され、径方向外側に突出し、前記締結部材が挿通する挿通孔が形成された締結部を有し、
前記ケースは、前記ステータコアと当接し、前記締結部材が締結される締結孔が形成された当接部を有し、
前記締結部材が、前記ステータコアの前記挿通孔を挿通し、前記ケースの前記締結孔に締結されることによって、前記ステータが前記ケースに固定された回転電機であって、
前記複数の電磁鋼板のうち、前記ケースと当接する第1電磁鋼板の前記締結部の外周縁は、前記第1電磁鋼板と隣接する第2電磁鋼板の前記締結部の外周縁よりも径方向内側となるように形成された、回転電機。
A stator having a substantially annular stator core having a plurality of slot portions and a coil attached to the stator core;
A case formed of a material having a higher linear expansion coefficient than the stator core;
A fastening member for fixing the stator to the case,
The coil has a plurality of slot coil portions inserted into the slot portion,
The plurality of slot coil portions are insulated from the adjacent slot coil portions by an insulating member,
The stator core is composed of a plurality of laminated electromagnetic steel plates, has a fastening portion that projects radially outward, and has an insertion hole through which the fastening member is inserted,
The case has an abutting portion that is in contact with the stator core and has a fastening hole for fastening the fastening member,
A rotating electrical machine in which the stator is fixed to the case by the fastening member being inserted through the insertion hole of the stator core and fastened to the fastening hole of the case,
An outer peripheral edge of the fastening portion of the first electromagnetic steel sheet, which is in contact with the case among the plurality of electromagnetic steel sheets, is radially inner than an outer peripheral edge of the fastening portion of the second electromagnetic steel sheet adjacent to the first electromagnetic steel sheet. A rotating electric machine formed so as to be.
複数のスロット部を有する略円環形状のステータコアと、前記ステータコアに取り付けられるコイルと、を有するステータと、
前記ステータコアよりも線膨張係数が高い材料で形成されたケースと、
前記ステータを前記ケースに固定する締結部材と、を備え、
前記コイルは、前記スロット部に挿入された複数のスロットコイル部を有し、
前記複数のスロットコイル部は、絶縁部材によって隣接する前記スロットコイル部と絶縁されており、
前記ステータコアは、積層された複数の電磁鋼板から構成され、径方向外側に突出し、前記締結部材が挿通する挿通孔が形成された締結部を有し、
前記ケースは、前記ステータコアと当接し、前記締結部材が締結される締結孔が形成された当接部を有し、
前記締結部材が、前記ステータコアの前記挿通孔を挿通し、前記ケースの前記締結孔に締結されることによって、前記ステータが前記ケースに固定された回転電機であって、
前記ケースの前記当接部は、前記複数の電磁鋼板のうち、前記ケースと当接する第1電磁鋼板の前記締結部の外周縁、及び前記第1電磁鋼板と隣接する第2電磁鋼板の前記締結部の外周縁よりも径方向内側に形成された、回転電機。
A stator having a substantially annular stator core having a plurality of slot portions and a coil attached to the stator core;
A case formed of a material having a higher linear expansion coefficient than the stator core;
A fastening member for fixing the stator to the case,
The coil has a plurality of slot coil portions inserted into the slot portion,
The plurality of slot coil portions are insulated from the adjacent slot coil portions by an insulating member,
The stator core is composed of a plurality of laminated electromagnetic steel plates, has a fastening portion that projects radially outward, and has an insertion hole through which the fastening member is inserted,
The case has an abutting portion that is in contact with the stator core and has a fastening hole for fastening the fastening member,
A rotating electrical machine in which the stator is fixed to the case by the fastening member being inserted through the insertion hole of the stator core and fastened to the fastening hole of the case,
The abutting portion of the case includes, among the plurality of electromagnetic steel sheets, an outer peripheral edge of the fastening portion of the first electromagnetic steel sheet that abuts the case, and the fastening of the second electromagnetic steel sheet adjacent to the first electromagnetic steel sheet. A rotary electric machine formed radially inside the outer peripheral edge of the portion.
請求項1または2に記載の回転電機であって、
前記絶縁部材は、前記スロットコイル部と、隣接する前記スロットコイル部との間に介挿された絶縁紙である、回転電機。
The rotating electric machine according to claim 1 or 2, wherein
The rotating electric machine, wherein the insulating member is an insulating paper interposed between the slot coil section and the adjacent slot coil section.
請求項1または2に記載の回転電機であって、
前記絶縁部材は、前記スロットコイル部の外周面に被膜された絶縁被膜である、回転電機。
The rotating electric machine according to claim 1 or 2, wherein
The rotating electric machine, wherein the insulating member is an insulating coating film coated on an outer peripheral surface of the slot coil portion.
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