JP6907609B2

JP6907609B2 - Rotating machine

Info

Publication number: JP6907609B2
Application number: JP2017045149A
Authority: JP
Inventors: 優人本間; 光良江尻; 正一江島
Original assignee: Meidensha Corp
Current assignee: Meidensha Corp
Priority date: 2017-03-09
Filing date: 2017-03-09
Publication date: 2021-07-21
Anticipated expiration: 2037-03-09
Also published as: JP2018148775A

Description

本発明は、コイル押さえ部材を備えた回転電機に関する。 The present invention relates to a rotary electric machine provided with a coil holding member.

回転電機は、電気の磁気作用によって固定子と回転子との間に生じる反発力および吸引力を利用し、固定子に対して回転子を回転するものであり、このような回転電機の一つとして、突極形回転子を備えた突極形回転電機がある。 A rotary electric machine uses the repulsive force and attractive force generated between the stator and the rotor by the magnetic action of electricity to rotate the rotor with respect to the stator, and is one of such rotary electric machines. As a example, there is a salient pole type rotary electric machine equipped with a salient pole type rotor.

突極形回転子は、回転軸に対して径方向外側に突出する突部を有する鉄心と当該鉄心の突部に巻き付けられる巻線とから成る磁極が周方向に複数備えられて成り、突極形回転電機は、筒状の固定子の径方向内側に突極形回転子が回転可能に設けられて成る。このような突極形回転電機においては、回転動作時の遠心力によって巻線が変形を起こす虞があるため、磁極間にコイル押さえ部材を設けて巻線を押さえ付けることにより、当該巻線の変形を防止している。 The salient pole type rotor is composed of a plurality of magnetic poles in the circumferential direction, which are composed of an iron core having a protrusion protruding radially outward with respect to the rotation axis and a winding wound around the protrusion of the iron core. The shape rotary electric machine is formed by rotatably providing a salient pole type rotor inside the tubular stator in the radial direction. In such a salient pole type rotary electric machine, the winding may be deformed by the centrifugal force during the rotation operation. Therefore, by providing a coil holding member between the magnetic poles and pressing the winding, the winding is pressed. Prevents deformation.

一般に、回転電機においては、損失による熱が発生するため、回転電機各部が過熱されて劣化や焼損などを生じる虞があるため、回転電機には、種々の冷却構造が設けられている。突極形回転電機に設けられる冷却構造としては、例えば、冷却媒体を磁極間の空間（磁極間空間）に供給して流通させることにより、当該磁極間空間に臨んで配置された回転子巻線等の回転電機各部を冷却するものがある。 Generally, in a rotary electric machine, heat is generated due to loss, so that each part of the rotary electric machine may be overheated, resulting in deterioration or burning. Therefore, the rotary electric machine is provided with various cooling structures. As a cooling structure provided in the salient pole type rotary electric machine, for example, a rotor winding is arranged so as to face the space between magnetic poles by supplying a cooling medium to the space between magnetic poles (space between magnetic poles) and circulating the cooling medium. There is something that cools each part of the rotating electric machine.

特開２００８−２８３７３７号公報Japanese Unexamined Patent Publication No. 2008-283737

しかし、コイル押さえ部材を備えた突極形回転電機においては、コイル押さえ部材が磁極間空間を軸方向に流れる冷却媒体の抵抗となり、回転電機における冷却媒体の流通効率すなわち冷却効率が低下してしまう虞がある。 However, in the salient pole type rotary electric machine provided with the coil holding member, the coil holding member becomes a resistance of the cooling medium flowing in the space between the magnetic poles in the axial direction, and the distribution efficiency of the cooling medium in the rotary electric machine, that is, the cooling efficiency is lowered. There is a risk.

ここで、コイル押さえ部材を備えた突極形回転電機における冷却効率を向上させる技術として、例えば、特許文献１に記載のものがある。特許文献１には、コイルブラケット（コイル押さえ部材）に界磁コイル（巻線）の積層方向に沿う一対の通風溝を設けることにより、冷却風を通風溝に流通させて界磁コイルの温度上昇を抑制することが記載されている。 Here, as a technique for improving the cooling efficiency in a salient pole type rotary electric machine provided with a coil holding member, for example, there is one described in Patent Document 1. In Patent Document 1, the coil bracket (coil holding member) is provided with a pair of ventilation grooves along the stacking direction of the field coil (winding), so that the cooling air is circulated through the ventilation groove and the temperature of the field coil rises. It is described that it suppresses.

しかし、特許文献１に記載の回転電機においても、コイルブラケット（コイル押さえ部材）が周方向において隣接した界磁コイル（磁極）間の空間を軸方向に流れる冷却風（冷却媒体）の抵抗となるため、回転電機における冷却風の流通効率すなわち冷却効率が低下してしまう虞がある。 However, even in the rotary electric machine described in Patent Document 1, the coil bracket (coil holding member) becomes a resistance of the cooling air (cooling medium) flowing in the axial direction in the space between the field coils (magnetic poles) adjacent to each other in the circumferential direction. Therefore, there is a risk that the flow efficiency of the cooling air in the rotary electric machine, that is, the cooling efficiency will decrease.

本発明は上記問題に鑑みてなされたもので、コイル押さえ部材を備えた回転電機における冷却効率を向上させることを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to improve the cooling efficiency of a rotary electric machine provided with a coil holding member.

上記課題を解決する第一の発明に係る回転電機は、固定子と、前記固定子の径方向内側において回転可能に支持され、径方向外側へ突出した複数の突部が周方向に沿って配置される鉄心と、前記突部の外周部に巻き付けられる巻線と、前記巻線間に設けられるコイル押さえ部材と、前記コイル押さえ部材において前記巻線と対向する第一の面に形成され、径方向内側から径方向外側へ延びる溝部と、前記コイル押さえ部材を軸方向に貫通する第一の貫通孔とを備えたことを特徴とする。 In the rotary electric machine according to the first invention for solving the above problems, a stator and a plurality of protrusions rotatably supported inside the stator in the radial direction and protruding outward in the radial direction are arranged along the circumferential direction. The iron core to be formed, the winding wound around the outer peripheral portion of the protrusion, the coil holding member provided between the windings, and the coil holding member formed on the first surface facing the winding and having a diameter. A groove portion extending from the inside in the direction to the outside in the radial direction and a first through hole for axially penetrating the coil holding member are provided.

上記課題を解決する第二の発明に係る回転電機は、第一の発明に係る回転電機において、前記第一の貫通孔は、前記溝部と連通して形成されるものであることを特徴とする。 The rotary electric machine according to the second invention for solving the above problems is characterized in that, in the rotary electric machine according to the first invention, the first through hole is formed so as to communicate with the groove portion. ..

上記課題を解決する第三の発明に係る回転電機は、第一または第二の発明に係る回転電機において、前記コイル押さえ部材は、前記溝部および前記第一の貫通孔と連通する第二の貫通孔を有するものであることを特徴とする。 The rotary electric machine according to the third invention for solving the above problems is the rotary electric machine according to the first or second invention, in which the coil holding member communicates with the groove portion and the first through hole. It is characterized by having a hole.

上記課題を解決する第四の発明に係る回転電機は、第三の発明に係る回転電機において、前記溝部は、前記コイル押さえ部材における前記固定子と対向する第二の面に臨む溝部開口を有するものであり、前記第二の貫通孔は、前記第二の面に臨む貫通孔開口を有するものであり、前記貫通孔開口と前記固定子との距離は、前記溝部開口と前記固定子との距離よりも長いことを特徴とする。 The rotary electric machine according to the fourth invention for solving the above problems is the rotary electric machine according to the third invention, in which the groove portion has a groove portion opening facing the second surface of the coil holding member facing the stator. The second through hole has a through hole opening facing the second surface, and the distance between the through hole opening and the stator is the distance between the groove opening and the stator. It is characterized by being longer than the distance.

第一の発明に係る回転電機によれば、冷却媒体が溝部および第一の貫通孔に流通されるので、コイル押さえ部材および巻線の冷却効率を向上させることができる。また、第一の貫通孔がコイル押さえ部材の軸方向に貫通して形成されているので、周方向において隣接する巻線（磁極）間を軸方向に流れる冷却媒体の抵抗を低減することができる。つまり、回転電機における冷却媒体の流通効率および冷却効率を向上させることができる。 According to the rotary electric machine according to the first invention, since the cooling medium is circulated in the groove portion and the first through hole, the cooling efficiency of the coil holding member and the winding can be improved. Further, since the first through hole is formed so as to penetrate in the axial direction of the coil holding member, the resistance of the cooling medium flowing in the axial direction between the adjacent windings (magnetic poles) in the circumferential direction can be reduced. .. That is, it is possible to improve the distribution efficiency and the cooling efficiency of the cooling medium in the rotary electric machine.

第二の発明に係る回転電機によれば、第一の貫通孔が溝部と連通することにより、溝部を流れる冷却媒体の一部が第一の貫通孔に流入する、または、第一の貫通孔を流れる冷却媒体の一部が溝部に流入することとなるので、溝部および第一の貫通孔を流れる冷却媒体の流通効率を向上させることができる。 According to the rotary electric machine according to the second invention, when the first through hole communicates with the groove portion, a part of the cooling medium flowing through the groove portion flows into the first through hole, or the first through hole Since a part of the cooling medium flowing through the groove portion flows into the groove portion, the distribution efficiency of the cooling medium flowing through the groove portion and the first through hole can be improved.

第三の発明に係る回転電機によれば、第二の貫通孔が溝部および第一の貫通孔と連通することにより、溝部を流れる冷却媒体の一部が第一の貫通孔および第二の貫通孔に流入する、第一の貫通孔を流れる冷却媒体の一部が溝部および第二の貫通孔に流入する、または、第二の貫通孔を流れる冷却媒体の一部が溝部および第一の貫通孔に流入することとなるので、溝部、第一の貫通孔および第二の貫通孔を流れる冷却媒体の流通効率を向上させることができる。 According to the rotary electric machine according to the third invention, the second through hole communicates with the groove portion and the first through hole, so that a part of the cooling medium flowing through the groove portion is formed through the first through hole and the second through hole. A part of the cooling medium flowing into the hole, flowing through the first through hole flows into the groove and the second through hole, or a part of the cooling medium flowing through the second through hole flows into the groove and the first through hole. Since it flows into the holes, it is possible to improve the flow efficiency of the cooling medium flowing through the groove, the first through hole, and the second through hole.

第四の発明に係る回転電機によれば、第二の貫通孔がコイル押さえ部材と固定子との隙間（ギャップ）の大きい箇所に開口することとなるので、当該第二の貫通孔を流れる冷却媒体の流通抵抗を低減することができる。つまり、回転電機における冷却媒体の流通効率および冷却効率を向上させることができる。 According to the rotary electric machine according to the fourth invention, the second through hole is opened at a place where the gap between the coil holding member and the stator is large, so that the cooling flowing through the second through hole is performed. The distribution resistance of the medium can be reduced. That is, it is possible to improve the distribution efficiency and the cooling efficiency of the cooling medium in the rotary electric machine.

実施例１に係る回転電機の構造を示す説明図である。It is explanatory drawing which shows the structure of the rotary electric machine which concerns on Example 1. FIG. 実施例１に係る回転電機の構造を示す説明図（図１におけるII矢視図）である。It is explanatory drawing (II arrow view in FIG. 1) which shows the structure of the rotary electric machine which concerns on Example 1. FIG. 実施例２に係る回転電機の構造を示す説明図である。It is explanatory drawing which shows the structure of the rotary electric machine which concerns on Example 2. FIG. 実施例２に係る回転電機の構造を示す説明図（図１におけるIV矢視図）である。It is explanatory drawing (IV arrow view in FIG. 1) which shows the structure of the rotary electric machine which concerns on Example 2. FIG. 実施例３に係る回転電機の構造を示す説明図である。It is explanatory drawing which shows the structure of the rotary electric machine which concerns on Example 3. FIG. 実施例３に係る回転電機の構造を示す説明図（図１におけるVI矢視図）である。It is explanatory drawing (VI arrow view in FIG. 1) which shows the structure of the rotary electric machine which concerns on Example 3. FIG.

以下に、本発明に係る回転電機の実施例について、添付図面を参照して詳細に説明する。もちろん、本発明は以下の実施例に限定されず、本発明の趣旨を逸脱しない範囲で各種変更が可能であることは言うまでもない。 Hereinafter, examples of the rotary electric machine according to the present invention will be described in detail with reference to the accompanying drawings. Of course, the present invention is not limited to the following examples, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

［実施例１］
本発明の実施例１に係る回転電機の構造について、図１および図２を参照して説明する。 [Example 1]
The structure of the rotary electric machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

図１に示すように、回転電機１には、図示しないフレームに固定される略円筒形状の固定子１１と、この固定子１１の径方向内側に配置されて当該固定子１１に対して回転可能な回転子１２とが設けられている。回転電機１においては、電気の磁気作用によって固定子１１と回転子１２との間に生じる反発力および吸引力を利用することにより、回転子１２が固定子１１に対して回転される。 As shown in FIG. 1, the rotary electric machine 1 has a substantially cylindrical stator 11 fixed to a frame (not shown), and is arranged inside the stator 11 in the radial direction and is rotatable with respect to the stator 11. A rotor 12 is provided. In the rotary electric machine 1, the rotor 12 is rotated with respect to the stator 11 by utilizing the repulsive force and the attractive force generated between the stator 11 and the rotor 12 by the magnetic action of electricity.

回転子１２には、図示しないフレームに回転可能に支持される回転子鉄心２１と、この回転子鉄心２１に巻装される回転子巻線２２とが設けられている。回転子鉄心２１は、回転中心部を構成する軸部２１ａと、この軸部２１ａから径方向外側に向けて突出する複数（本実施例においては、四つ）の突部２１ｂとから概略構成されており、複数の突部２１ｂは、周方向に沿って等角度（本実施例においては、９０°）間隔で配置されている。 The rotor 12 is provided with a rotor core 21 rotatably supported by a frame (not shown) and a rotor winding 22 wound around the rotor core 21. The rotor core 21 is roughly composed of a shaft portion 21a forming a rotation center portion and a plurality of (four in this embodiment) protrusions 21b protruding outward in the radial direction from the shaft portion 21a. The plurality of protrusions 21b are arranged at equal angles (90 ° in this embodiment) along the circumferential direction.

回転子巻線２２は、突部２１ｂの外周部に巻き付けられており、突部２１ｂの先端部（径方向外側端部）には、回転子巻線２２の逸脱を防止する頭部２３が取り付けられている。頭部２３は、その外周部が突部２１ｂよりも軸方向および周方向に張り出した形状から成り、回転子巻線２２を径方向外側から覆っている。 The rotor winding 22 is wound around the outer peripheral portion of the protrusion 21b, and a head portion 23 for preventing deviation of the rotor winding 22 is attached to the tip portion (radial outer end portion) of the protrusion 21b. Has been done. The head 23 has a shape in which the outer peripheral portion thereof protrudes in the axial direction and the circumferential direction from the protrusion 21b, and covers the rotor winding 22 from the radial outside.

回転電機１においては、突部２１ｂと頭部２３と回転子巻線２２とによって磁極１２ａが構成されており、この磁極１２ａは、周方向に沿って等角度（本実施例においては、９０°）間隔で複数（本実施例においては、四つ）配置されている。つまり、回転子１２は、周方向に複数の磁極１２ａを有する突極形回転子であり、回転電機１は、当該回転子１２を備えた突極形回転電機である。 In the rotary electric machine 1, a magnetic pole 12a is formed by a protrusion 21b, a head portion 23, and a rotor winding 22. The magnetic pole 12a has an equal angle along the circumferential direction (90 ° in this embodiment). ) Multiple (four in this embodiment) are arranged at intervals. That is, the rotor 12 is a salient pole type rotor having a plurality of magnetic poles 12a in the circumferential direction, and the rotary electric machine 1 is a salient pole type rotary electric machine provided with the rotor 12.

図１に示すように、回転子１２には、当該回転子１２の回転動作時の遠心力によって回転子巻線２２の変形を防止するためのコイル押さえ部材２４およびコイル支え部材２５が設けられている。コイル押さえ部材２４は、回転子１２の回転軸方向（軸方向）と直交する横断面が台形（略三角形）を成しており、周方向に隣接する磁極１２ａ（回転子巻線２２）間において、その幅方向外側端面（第一の面）２４ａが周方向に隣接する回転子巻線２２の周方向外側端面２２ａと対向するように配置されている。コイル支え部材２５は、軸方向と直交する横断面が台形を成しており、周方向に隣接する磁極１２ａ（回転子巻線２２）間において、その幅方向外側端面２５ａが周方向に隣接する回転子巻線２２の径方向内側端面２２ｂと対向するように配置されている。 As shown in FIG. 1, the rotor 12 is provided with a coil holding member 24 and a coil supporting member 25 for preventing deformation of the rotor winding 22 due to centrifugal force during the rotational operation of the rotor 12. There is. The coil holding member 24 has a trapezoidal (substantially triangular) cross section perpendicular to the rotation axis direction (axial direction) of the rotor 12, and is located between the magnetic poles 12a (rotor winding 22) adjacent to each other in the circumferential direction. The outer end surface (first surface) 24a in the width direction is arranged so as to face the outer end surface 22a in the circumferential direction of the rotor winding 22 adjacent in the circumferential direction. The coil support member 25 has a trapezoidal cross section orthogonal to the axial direction, and its widthwise outer end surface 25a is adjacent in the circumferential direction between the magnetic poles 12a (rotor winding 22) adjacent in the circumferential direction. It is arranged so as to face the radial inner end surface 22b of the rotor winding 22.

また、コイル押さえ部材２４とコイル支え部材２５とは、回転子巻線２２の角部を挟持するように、ボルト３１で連結されている。なお、コイル押さえ部材２４およびコイル支え部材２５は、それぞれ絶縁板４１，４２を介して回転子巻線２２と当接している。 Further, the coil holding member 24 and the coil supporting member 25 are connected by bolts 31 so as to sandwich the corners of the rotor winding 22. The coil holding member 24 and the coil supporting member 25 are in contact with the rotor winding 22 via the insulating plates 41 and 42, respectively.

図１および図２に示すように、コイル押さえ部材２４には、ボルト３１を挿通可能なボルト孔５１が当該コイル押さえ部材２４の幅方向（図２においては、上下方向）中央部に位置すると共に軸方向（図２においては、左右方向）に並んで複数（本実施例においては、二つ）設けられている。ボルト３１がボルト孔５１に挿入され、当該ボルト３１の先端がコイル支え部材２５に設けられたタップ穴６１に螺合されることにより、コイル押さえ部材２４とコイル支え部材２５とが連結されている。 As shown in FIGS. 1 and 2, in the coil holding member 24, a bolt hole 51 through which a bolt 31 can be inserted is located at the center of the coil holding member 24 in the width direction (vertical direction in FIG. 2). A plurality (two in this embodiment) are provided side by side in the axial direction (left-right direction in FIG. 2). The coil holding member 24 and the coil supporting member 25 are connected by inserting the bolt 31 into the bolt hole 51 and screwing the tip of the bolt 31 into the tap hole 61 provided in the coil supporting member 25. ..

また、コイル押さえ部材２４の幅方向外側端面２４ａには、径方向内側から径方向外側へ延びる溝部５２が形成されている。溝部５２は、各幅方向外側端面２４ａにおいて軸方向に並んで複数（本実施例においては、二つずつ）設けられており、冷却空気（冷却媒体）を軸方向と直交する方向であって回転子巻線２２における鋼板積層方向（回転子巻線２２を構成する鋼板が積層される方向）に流通可能な流路として機能する。回転電機１においては、冷却空気が溝部５２を流れることにより、コイル押さえ部材２４および回転子巻線２２が冷却される。 Further, a groove portion 52 extending from the inner side in the radial direction to the outer side in the radial direction is formed on the outer end surface 24a in the width direction of the coil holding member 24. A plurality of groove portions 52 (two each in the present embodiment) are provided side by side in the axial direction on the outer end surface 24a in each width direction, and the cooling air (cooling medium) is rotated in a direction orthogonal to the axial direction. It functions as a flow path that can flow in the steel plate laminating direction of the child winding 22 (the direction in which the steel plates constituting the rotor winding 22 are laminated). In the rotary electric machine 1, the coil holding member 24 and the rotor winding 22 are cooled by the cooling air flowing through the groove portion 52.

また、コイル押さえ部材２４には、当該コイル押さえ部材２４を軸方向に貫通する貫通孔（第一の貫通孔）５３が形成されている。貫通孔５３は、当該コイル押さえ部材２４の幅方向に並んで複数（本実施例においては、二つ）設けられており、冷却空気（冷却媒体）を軸方向に流通可能な流路として機能する。回転電機１においては、冷却空気が貫通孔５３を流れることにより、コイル押さえ部材２４が冷却される。なお、貫通孔５３は、コイル押さえ部材２４における幅方向外側端面２４ａから離間した位置であって、ボルト孔５１と溝部５２との間に形成されている。 Further, the coil pressing member 24 is formed with a through hole (first through hole) 53 that penetrates the coil pressing member 24 in the axial direction. A plurality of through holes 53 (two in this embodiment) are provided side by side in the width direction of the coil holding member 24, and function as a flow path through which cooling air (cooling medium) can flow in the axial direction. .. In the rotary electric machine 1, the coil holding member 24 is cooled by the cooling air flowing through the through hole 53. The through hole 53 is located at a position separated from the outer end surface 24a in the width direction of the coil holding member 24, and is formed between the bolt hole 51 and the groove portion 52.

本発明の実施例１に係る回転電機の動作について、図１および図２を参照して説明する。 The operation of the rotary electric machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

回転電機１が動作され、回転子１２が固定子１１に対して回転されると、この回転子１２の回転動作に伴って図示しないファンが回転される（図１参照）。そして、図示しない冷却媒体供給装置によって供給される冷却空気（冷却媒体）は、図示しないファンの回転動作により、周方向において隣接した磁極１２ａ（回転子巻線２２）間の空間（磁極間空間）Ｓに供給され、この磁極間空間Ｓ内を軸方向に流れる（図２参照）。 When the rotary electric machine 1 is operated and the rotor 12 is rotated with respect to the stator 11, a fan (not shown) is rotated along with the rotational operation of the rotor 12 (see FIG. 1). The cooling air (cooling medium) supplied by the cooling medium supply device (not shown) is the space (intermagnetic space) between the magnetic poles 12a (rotor winding 22) adjacent to each other in the circumferential direction due to the rotational operation of the fan (not shown). It is supplied to S and flows in the space S between magnetic poles in the axial direction (see FIG. 2).

磁極間空間Ｓ内に供給された冷却空気は、軸方向一方側（図２においては、左方側）からコイル押さえ部材２４に向けて流れ、当該コイル押さえ部材２４に達すると、コイル押さえ部材２４の径方向外側の空間（径方向外側空間）Ｓ₁および径方向内側の空間（径方向内側空間）Ｓ₂（図１参照）とコイル押さえ部材２４に設けられた貫通孔５３とを通って当該コイル押さえ部材２４の軸方向他方側（図２においては、右方側）へ向けて流れる。 The cooling air supplied into the space S between the magnetic poles flows from one side in the axial direction (the left side in FIG. 2) toward the coil holding member 24, and when it reaches the coil holding member 24, the coil holding member 24 Through the radial outer space (radial outer space) S ₁ and the radial inner space (diametric inner space) S ₂ (see FIG. 1) and the through hole 53 provided in the coil holding member 24. The flow flows toward the other side in the axial direction of the coil holding member 24 (the right side in FIG. 2).

また、磁極間空間Ｓ内に供給された冷却空気であってコイル押さえ部材２４の径方向内側の空間Ｓ₂（または、径方向外側の空間Ｓ₁）に流入した冷却空気は、コイル押さえ部材２４に設けられた溝部５２を通って当該コイル押さえ部材２４の径方向外側の空間Ｓ₁（または、径方向内側の空間Ｓ₂）へ向けて流れる（図１参照）。 Further, the cooling air supplied into the space S between the magnetic poles _{and flowing into the space S 2} (or the space S ₁ outside the radial direction) of the coil holding member 24 in the radial direction is the cooling air of the coil holding member 24. _{It flows toward the radial outer space S 1} (or the radial inner space S ₂ ) of the coil holding member 24 through the groove 52 provided in the coil holding member 24 (see FIG. 1).

本実施例によれば、コイル押さえ部材２４に貫通孔５３を形成することにより、冷却空気に晒されるコイル押さえ部材２４の表面積が増大されるので、コイル押さえ部材２４の冷却効率を向上させることができる。 According to this embodiment, by forming the through hole 53 in the coil pressing member 24, the surface area of the coil pressing member 24 exposed to the cooling air is increased, so that the cooling efficiency of the coil pressing member 24 can be improved. can.

また、磁極間空間Ｓにおいて軸方向に流れる冷却空気は、径方向外側空間Ｓ₁および径方向内側空間Ｓ₂だけでなく、貫通孔５３を通って当該コイル押さえ部材２４の軸方向一方側から軸方向他方側へ流れるので、磁極間空間Ｓを軸方向に流れる冷却空気の抵抗を低減し、回転電機１における冷却空気の流通効率すなわち冷却効率を向上させることができる。 Axis also the cooling air flowing axially in the inter-pole space S, the radially outer spaces S ₁ and radial inner space S ₂ as well, from one axial side of the coil holding member 24 through the through-holes 53 Since it flows to the other side in the direction, the resistance of the cooling air flowing in the space S between the magnetic poles in the axial direction can be reduced, and the flow efficiency of the cooling air in the rotary electric machine 1, that is, the cooling efficiency can be improved.

また、コイル押さえ部材２４に溝部５２を形成することにより、当該溝部５２（コイル押さえ部材２４と回転子巻線２２との間）においてコイル押さえ部材２４および回転子巻線２２が冷却空気に晒されるので、コイル押さえ部材２４および回転子巻線２２の冷却効率を向上させることができる。 Further, by forming the groove portion 52 in the coil pressing member 24, the coil pressing member 24 and the rotor winding 22 are exposed to the cooling air in the groove portion 52 (between the coil pressing member 24 and the rotor winding 22). Therefore, the cooling efficiency of the coil holding member 24 and the rotor winding 22 can be improved.

なお、回転電機１においては、周方向に隣接する磁極１２ａ（回転子巻線２２）間に設けられるコイル押さえ部材２４の数量、形状、位置、ならびに、当該コイル押さえ部材２４に設けられる溝部５２および貫通孔５３の数量、形状、位置を、回転機巻線２２の巻数（周方向外側端面２２ａの面積）や軸方向長さ、ならびに、冷却空気の流速や流量等に応じて、適宜設定することが可能である。 In the rotary electric machine 1, the quantity, shape, and position of the coil holding member 24 provided between the magnetic poles 12a (rotor winding 22) adjacent to each other in the circumferential direction, and the groove portion 52 and the groove portion 52 provided in the coil holding member 24. The quantity, shape, and position of the through hole 53 should be appropriately set according to the number of turns of the rotary machine winding 22 (area of the outer end surface 22a in the circumferential direction), the axial length, and the flow velocity and flow rate of the cooling air. Is possible.

また、回転電機１においては、コイル押さえ部材２４を、コイル支え部材２５と連結されるものとせず、例えば、ボルト３１によって回転子鉄心２１の軸部２１ａに直接固定されるものとしても良い。 Further, in the rotary electric machine 1, the coil holding member 24 may not be connected to the coil supporting member 25, but may be directly fixed to the shaft portion 21a of the rotor core 21 by, for example, a bolt 31.

［実施例２］
本発明の実施例１に係る回転電機の構造について、図３および図４を参照して説明する。 [Example 2]
The structure of the rotary electric machine according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4.

本実施例に係る回転電機は、本発明の実施例１に係る回転電機と同様に四極の突極形回転電機であり、コイル押さえ部材１２４の構成を除いて、本発明の実施例１に係る回転電機と同様な構成を有するものである。よって、本実施例に係る回転電機における実施例１と同様な構成に対する重複説明は適宜省略する。 The rotary electric machine according to the present embodiment is a four-pole salient pole type rotary electric machine like the rotary electric machine according to the first embodiment of the present invention, and the rotary electric machine according to the first embodiment of the present invention except for the configuration of the coil holding member 124. It has the same configuration as a rotary electric machine. Therefore, duplicate description of the same configuration as that of the first embodiment in the rotary electric machine according to the present embodiment will be omitted as appropriate.

図３に示すように、回転電機１０１には、突部２１ｂと頭部２３と回転子巻線２２とによって構成される磁極１２ａを備えた回転子１１２が設けられており、この回転子１１２には、周方向において隣接する磁極１２ａ（回転子巻線２２）間に配置されるコイル押さえ部材１２４が設けられている。 As shown in FIG. 3, the rotary electric machine 101 is provided with a rotor 112 having a magnetic pole 12a composed of a protrusion 21b, a head portion 23, and a rotor winding 22, and the rotor 112 is provided with a rotor 112. Is provided with a coil holding member 124 arranged between adjacent magnetic poles 12a (rotor winding 22) in the circumferential direction.

図３および図４に示すように、コイル押さえ部材１２４には、ボルト３１を挿通可能なボルト孔１５１が当該コイル押さえ部材１２４の幅方向（図４においては、上下方向）中央部に位置すると共に軸方向（図４においては、左右方向）に並んで複数（本実施例においては、二つ）設けられている。ボルト３１がボルト孔１５１に挿入され、当該ボルト３１の先端がコイル支え部材２５に設けられたタップ穴６１に螺合されることにより、コイル押さえ部材１２４とコイル支え部材２５とが連結されている。 As shown in FIGS. 3 and 4, in the coil holding member 124, a bolt hole 151 through which a bolt 31 can be inserted is located at the center of the coil holding member 124 in the width direction (vertical direction in FIG. 4). A plurality (two in this embodiment) are provided side by side in the axial direction (left-right direction in FIG. 4). The coil holding member 124 and the coil supporting member 25 are connected by inserting the bolt 31 into the bolt hole 151 and screwing the tip of the bolt 31 into the tap hole 61 provided in the coil supporting member 25. ..

また、コイル押さえ部材１２４の幅方向外側端面（第一の面）１２４ａには、径方向内側から径方向外側へ延びる溝部１５２が形成されている。溝部１５２は、各幅方向外側端面１２４ａにおいて軸方向に並んで複数（本実施例においては、二つずつ）設けられており、冷却空気（冷却媒体）を軸方向と直交する方向であって回転子巻線２２における鋼板積層方向（回転子巻線２２を構成する鋼板が積層される方向）に流通可能な流路として機能する。回転電機１０１においては、冷却空気が溝部１５２を流れることにより、コイル押さえ部材１２４および回転子巻線２２が冷却される。 Further, a groove portion 152 extending from the inner side in the radial direction to the outer side in the radial direction is formed on the outer end surface (first surface) 124a in the width direction of the coil holding member 124. A plurality of groove portions 152 are provided side by side in the axial direction (two each in the present embodiment) on the outer end faces 124a in each width direction, and the cooling air (cooling medium) is rotated in a direction orthogonal to the axial direction. It functions as a flow path that can flow in the steel plate laminating direction of the child winding 22 (the direction in which the steel plates constituting the rotor winding 22 are laminated). In the rotary electric machine 101, the coil holding member 124 and the rotor winding 22 are cooled by the cooling air flowing through the groove portion 152.

また、コイル押さえ部材１２４には、当該コイル押さえ部材１２４を軸方向に貫通する貫通孔（第一の貫通孔）１５３が形成されている。貫通孔１５３は、当該コイル押さえ部材１２４の幅方向に並んで複数（本実施例においては、二つ）設けられており、冷却空気（冷却媒体）を軸方向に流通可能な流路として機能する。回転電機１０１においては、冷却空気が貫通孔１５３を流れることにより、コイル押さえ部材１２４が冷却される。 Further, the coil pressing member 124 is formed with a through hole (first through hole) 153 that penetrates the coil pressing member 124 in the axial direction. A plurality of through holes 153 (two in this embodiment) are provided side by side in the width direction of the coil holding member 124, and function as a flow path through which cooling air (cooling medium) can flow in the axial direction. .. In the rotary electric machine 101, the coil holding member 124 is cooled by the cooling air flowing through the through hole 153.

ここで、貫通孔１５３は、コイル押さえ部材１２４における幅方向外側端面１２４ａの近傍に配置され、溝部１５２と交わって形成されている。具体的には、貫通孔１５３は、その中間部において溝部１５２と交差して形成されており、貫通孔１５３と溝部１５２とが連通している。よって、回転電機１０１の動作時には、溝部１５２を流れる冷却媒体の一部が貫通孔１５３に流入する、または、貫通孔１５３を流れる冷却媒体の一部が溝部１５２に流入することとなり、溝部１５２および貫通孔１５３を流れる冷却媒体の流通効率が相乗的に向上される。 Here, the through hole 153 is arranged in the vicinity of the outer end surface 124a in the width direction of the coil holding member 124, and is formed so as to intersect with the groove portion 152. Specifically, the through hole 153 is formed so as to intersect the groove portion 152 at an intermediate portion thereof, and the through hole 153 and the groove portion 152 communicate with each other. Therefore, during the operation of the rotary electric machine 101, a part of the cooling medium flowing through the groove portion 152 flows into the through hole 153, or a part of the cooling medium flowing through the through hole 153 flows into the groove portion 152, and the groove portion 152 and The distribution efficiency of the cooling medium flowing through the through hole 153 is synergistically improved.

本実施例によれば、溝部１５２と貫通孔１５３とを交わって（連通して）設けることにより、前述した本発明の実施例１に係る回転電機による作用効果に加え、磁極間空間Ｓにおける冷却媒体の流通効率を更に向上させ、回転電機１０１全体の冷却効率を更に向上させることができる。 According to the present embodiment, by providing the groove portion 152 and the through hole 153 so as to intersect (communicate) with each other, in addition to the above-mentioned action and effect of the rotary electric machine according to the first embodiment of the present invention, cooling in the space between magnetic poles S is performed. The distribution efficiency of the medium can be further improved, and the cooling efficiency of the entire rotary electric machine 101 can be further improved.

［実施例３］
本発明の実施例３に係る回転電機の構造について、図５および図６を参照して説明する。 [Example 3]
The structure of the rotary electric machine according to the third embodiment of the present invention will be described with reference to FIGS. 5 and 6.

本実施例に係る回転電機は、本発明の実施例１に係る回転電機と同様に四極から成る突極形回転電機であり、コイル押さえ部材２２４の構成を除いて、本発明の実施例１に係る回転電機と同様な構成を有するものである。よって、本実施例に係る回転電機における実施例１と同様な構成に対する重複説明は適宜省略する。 The rotary electric machine according to the present embodiment is a salient pole type rotary electric machine composed of four poles like the rotary electric machine according to the first embodiment of the present invention, and is described in the first embodiment of the present invention except for the configuration of the coil holding member 224. It has the same configuration as the rotary electric machine. Therefore, duplicate description of the same configuration as that of the first embodiment in the rotary electric machine according to the present embodiment will be omitted as appropriate.

図５に示すように、回転電機２０１には、突部２１ｂと頭部２３と回転子巻線２２とによって構成される磁極１２ａを備えた回転子２１２が設けられており、この回転子２１２には、周方向において隣接する磁極１２ａ（回転子巻線２２）間に配置されるコイル押さえ部材２２４が設けられている。 As shown in FIG. 5, the rotary electric machine 201 is provided with a rotor 212 having a magnetic pole 12a composed of a protrusion 21b, a head portion 23, and a rotor winding 22, and the rotor 212 is provided with a rotor 212. Is provided with a coil holding member 224 arranged between adjacent magnetic poles 12a (rotor winding 22) in the circumferential direction.

図５および図６に示すように、コイル押さえ部材２２４には、ボルト３１を挿通可能なボルト孔２５１が当該コイル押さえ部材２２４の幅方向（図６においては、上下方向）中央部に位置すると共に軸方向（図６においては、左右方向）に並んで複数（本実施例においては、二つ）設けられている。ボルト３１がボルト孔２５１に挿入され、当該ボルト３１の先端がコイル支え部材２５に設けられたタップ穴６１に螺合されることにより、コイル押さえ部材２２４とコイル支え部材２５とが連結されている。 As shown in FIGS. 5 and 6, in the coil holding member 224, a bolt hole 251 through which a bolt 31 can be inserted is located at the center of the coil holding member 224 in the width direction (vertical direction in FIG. 6). A plurality (two in this embodiment) are provided side by side in the axial direction (left-right direction in FIG. 6). The coil holding member 224 and the coil supporting member 25 are connected by inserting the bolt 31 into the bolt hole 251 and screwing the tip of the bolt 31 into the tap hole 61 provided in the coil supporting member 25. ..

また、コイル押さえ部材２２４の幅方向外側端面（第一の面）２２４ａには、径方向内側から径方向外側へ延びる溝部２５２が形成されている。溝部２５２は、各幅方向外側端面２２４ａの軸方向中央部に位置して設けられており、冷却空気（冷却媒体）を軸方向と直交する方向であって回転子巻線２２における鋼板積層方向（回転子巻線２２を構成する鋼板が積層される方向）に流通可能な流路として機能する。回転電機２０１においては、冷却空気が溝部２５２を流れることにより、コイル押さえ部材２２４および回転子巻線２２が冷却される。 Further, a groove portion 252 extending from the inner side in the radial direction to the outer side in the radial direction is formed on the outer end surface (first surface) 224a in the width direction of the coil holding member 224. The groove portion 252 is provided at the central portion in the axial direction of the outer end surface 224a in each width direction, and is a direction in which the cooling air (cooling medium) is orthogonal to the axial direction and is a steel plate laminating direction in the rotor winding 22 ( It functions as a flow path that can flow in the direction in which the steel plates constituting the rotor winding 22 are laminated). In the rotary electric machine 201, the coil holding member 224 and the rotor winding 22 are cooled by the cooling air flowing through the groove portion 252.

また、コイル押さえ部材２２４には、当該コイル押さえ部材２２４を軸方向に貫通する第一の貫通孔２５３が形成されている。第一の貫通孔２５３は、当該コイル押さえ部材２２４の幅方向に並んで複数（本実施例においては、二つ）設けられており、冷却空気（冷却媒体）を軸方向に流通可能な流路として機能する。回転電機２０１においては、冷却空気が第一の貫通孔２５３を流れることにより、コイル押さえ部材２２４が冷却される。 Further, the coil pressing member 224 is formed with a first through hole 253 that penetrates the coil pressing member 224 in the axial direction. A plurality of (two in this embodiment) of the first through holes 253 are provided side by side in the width direction of the coil holding member 224, and a flow path through which cooling air (cooling medium) can flow in the axial direction. Functions as. In the rotary electric machine 201, the coil holding member 224 is cooled by the cooling air flowing through the first through hole 253.

また、コイル押さえ部材２２４には、当該コイル押さえ部材２２４を高さ方向（略径方向）に貫通する第二の貫通孔２５４が形成されている。第二の貫通孔２５４は、当該コイル押さえ部材２２４の幅方向に並んで複数（本実施例においては、二つ）設けられており、冷却空気を軸方向と直交する方向であって当該コイル押さえ部材２２４の高さ方向（略径方向）に流通可能な流路として機能する。回転電機２０１においては、冷却空気が第二の貫通孔２５４を流れることにより、コイル押さえ部材２２４が冷却される。 Further, the coil pressing member 224 is formed with a second through hole 254 that penetrates the coil pressing member 224 in the height direction (substantially radial direction). A plurality of second through holes 254 (two in this embodiment) are provided side by side in the width direction of the coil holding member 224, and the cooling air is orthogonal to the axial direction and the coil holding member 254 is held. It functions as a flow path that can flow in the height direction (approximately radial direction) of the member 224. In the rotary electric machine 201, the coil holding member 224 is cooled by the cooling air flowing through the second through hole 254.

ここで、第二の貫通孔２５４は、溝部２５２および第一の貫通孔２５３と交わって形成されている。具体的には、第二の貫通孔２５４は、その中間部において第一の貫通孔２５３と交差すると共に、その一端が溝部２５２に臨んで開口するように形成されており、溝部２５２と第一の貫通孔２５３と第二の貫通孔２５４とが連通（溝部２５２と第一の貫通孔２５３とが第二の貫通孔２５４を介して連通）している。よって、回転電機２０１の動作時には、溝部２５２を流れる冷却媒体の一部が第一の貫通孔２５３および第二の貫通孔２５４に流入する、第一の貫通孔２５３を流れる冷却媒体の一部が溝部２５２および第二の貫通孔２５４に流入する、または、第二の貫通孔２５４を流れる冷却媒体の一部が溝部２５２および第一の貫通孔２５３に流入することとなり、溝部２５２、第一の貫通孔２５３および第二の貫通孔２５４を流れる冷却媒体の流通効率が相乗的に向上される。 Here, the second through hole 254 is formed so as to intersect the groove portion 252 and the first through hole 253. Specifically, the second through hole 254 is formed so as to intersect the first through hole 253 in the intermediate portion thereof and one end thereof faces the groove portion 252, and the groove portion 252 and the first through hole 254 and the first through hole 254 are formed. The through hole 253 and the second through hole 254 communicate with each other (the groove 252 and the first through hole 253 communicate with each other through the second through hole 254). Therefore, during the operation of the rotary electric machine 201, a part of the cooling medium flowing through the groove 252 flows into the first through hole 253 and the second through hole 254, and a part of the cooling medium flowing through the first through hole 253 A part of the cooling medium that flows into the groove 252 and the second through hole 254 or flows through the second through hole 254 flows into the groove 252 and the first through hole 253, and the groove 252, the first through hole 254, The flow efficiency of the cooling medium flowing through the through hole 253 and the second through hole 254 is synergistically improved.

また、コイル押さえ部材２２４における固定子１１と対向する面（径方向外側端面、第二の面）２２４ｂは、平ら（平面）に形成されている。よって、溝部２５２が径方向外側端面２２４ｂ（径方向外側空間Ｓ₁）に臨む開口部（溝部開口）２５２ａは、固定子１１の内周面１１ａに近接している（Ｄ₂₅₂＜Ｄ₂₅₄）のに対し、第二の貫通孔２５４が径方向外側端面２２４ｂ（径方向外側空間Ｓ₁）に臨む開口部（貫通孔開口）２５４ａは、固定子１１の内周面１１ａから離間している（Ｄ₂₅₄＞Ｄ₂₅₂）。 Further, the surface (diameter outer end surface, second surface) 224b of the coil holding member 224 facing the stator 11 is formed to be flat (flat). Therefore, the opening (groove opening) 252a in which the groove 252 faces the radial outer end surface 224b (diameter outer space S ₁ ) is close to the inner peripheral surface 11a of the stator 11 (D ₂₅₂ <D ₂₅₄ ). On the other hand, the opening (through hole opening) 254a in which the second through hole 254 faces the radial outer end surface 224b (diameter outer space S ₁ ) is separated from the inner peripheral surface 11a of the stator 11 (D). ₂₅₄ > D ₂₅₂ ).

つまり、溝部２５２は、当該コイル押さえ部材２２４（径方向外側端面２２４ｂ）と固定子１１（内周面１１ａ）とのギャップ（Ｄ₂₅₂）が小さい箇所に開口している（開口部２５２ａを有している）のに対し、第二の貫通孔２５４は、当該コイル押さえ部材２２４（径方向外側端面２２４ｂ）と固定子１１（内周面１１ａ）とのギャップ（Ｄ₂₅₄）が大きい箇所に開口している（開口部２５４ａを有している）。 _{That is, the groove portion 252 is opened at a position where the gap (D 252} ) between the coil holding member 224 (radial outer end surface 224b) and the stator 11 (inner peripheral surface 11a) is small (having an opening 252a). The second through hole 254 opens at a place where _{the gap (D 254} ) between the coil holding member 224 (diameter outer end surface 224b) and the stator 11 (inner peripheral surface 11a) is large. (Has an opening 254a).

本実施例によれば、溝部２５２と第一の貫通孔２５３と第二の貫通孔２５４とを交わって（連通して）設けることにより、前述した本発明の実施例１に係る回転電機による作用効果に加え、磁極間空間Ｓにおける冷却媒体の流通効率を更に向上させ、回転電機２０１全体の冷却効率を更に向上させることができる。 According to the present embodiment, by providing the groove portion 252, the first through hole 253, and the second through hole 254 so as to intersect (communicate) with each other, the operation by the rotary electric machine according to the first embodiment of the present invention described above. In addition to the effect, the distribution efficiency of the cooling medium in the space S between the magnetic poles can be further improved, and the cooling efficiency of the rotating electric machine 201 as a whole can be further improved.

また、第二の貫通孔２５４を当該コイル押さえ部材２２４（径方向外側端面２２４ｂ）と固定子１１（内周面１１ａ）とのギャップが大きい箇所に開口して設けることにより、当該第二の貫通孔２５４を流れる冷却空気の流通抵抗が低減されるので、当該第二の貫通孔２５４を流れる冷却空気の流量を増大し、回転電機２０１における冷却空気の流通効率すなわち冷却効率を更に向上させることができる。 Further, the second through hole 254 is provided by opening at a place where the gap between the coil holding member 224 (radial outer end surface 224b) and the stator 11 (inner peripheral surface 11a) is large, so that the second through hole 254 is provided. Since the flow resistance of the cooling air flowing through the hole 254 is reduced, the flow rate of the cooling air flowing through the second through hole 254 can be increased, and the flow efficiency of the cooling air in the rotary electric machine 201, that is, the cooling efficiency can be further improved. can.

もちろん、本発明に係る回転電機は、本実施例のように、第二の貫通孔２５４をその中間部において第一の貫通孔２５３と交差すると共に一端が溝部２５２に臨んで開口するように形成するものに限定されない。本発明に係る回転電機におけるコイル押さえ部材として、例えば、溝部と第一の貫通孔と第二の貫通孔とが同じ箇所で交わって形成されたものであっても良い。 Of course, in the rotary electric machine according to the present invention, as in the present embodiment, the second through hole 254 is formed so as to intersect the first through hole 253 at the intermediate portion thereof and one end thereof faces the groove portion 252. It is not limited to what you do. As the coil holding member in the rotary electric machine according to the present invention, for example, the groove portion, the first through hole, and the second through hole may be formed at the same location.

１回転電機
１１固定子
１１ａ固定子の内周面
１２回転子
１２ａ磁極
２１回転子鉄心
２１ａ回転子鉄心の軸部
２１ｂ回転子鉄心の突部
２２回転子巻線
２２ａ固定子巻線の周方向外側端面
２２ｂ回転子巻線の径方向内側端面
２３頭部
２４コイル押さえ部材
２４ａコイル押さえ部材の幅方向外側端面（第一の面）
２５コイル支え部材
２５ａコイル支え部材の幅方向外側端面
３１ボルト
４１絶縁板
４２絶縁板
５１コイル押さえ部材のボルト孔
５２コイル押さえ部材の溝部
５３コイル押さえ部材の貫通孔（第一の貫通孔）
６１コイル支え部材のタップ穴
１０１回転電機
１１２回転子
１２４コイル押さえ部材
１２４ａコイル押さえ部材の幅方向外側端面（第一の面）
１５１コイル押さえ部材のボルト孔
１５２コイル押さえ部材の溝部
１５３コイル押さえ部材の貫通孔（第一の貫通孔）
２０１回転電機
２１２回転子
２２４コイル押さえ部材
２２４ａコイル押さえ部材の幅方向外側端面（第一の面）
２２４ｂコイル押さえ部材の径方向外側端面（第二の面）
２５１コイル押さえ部材のボルト孔
２５２コイル押さえ部材の溝部
２５２ａ溝部の開口部（溝部開口）
２５３コイル押さえ部材の第一の貫通孔
２５４コイル押さえ部材の第二の貫通孔
２５４ａ第二の貫通孔の開口部（貫通孔開口） 1 Rotor 11 Fixture 11a Inner peripheral surface of the stator 12 Rotor 12a Magnetic pole 21 Rotor core 21a Rotor core shaft 21b Rotor core protrusion 22 Rotor winding 22a Circumferential outer side of stator winding End face 22b Radial inner end face of rotor winding 23 Head 24 Coil holding member 24a Width outer end face of coil holding member (first surface)
25 Coil support member 25a Width outer end surface of coil support member 31 Bolt 41 Insulation plate 42 Insulation plate 51 Bolt hole of coil holding member 52 Groove of coil holding member 53 Through hole of coil holding member (first through hole)
61 Tap hole of coil support member 101 Rotating machine 112 Rotor 124 Coil holding member 124a Width outer end face (first surface) of coil holding member
151 Bolt hole of coil holding member 152 Groove of coil holding member 153 Through hole of coil holding member (first through hole)
201 Rotating machine 212 Rotor 224 Coil holding member 224a Width direction outer end face (first surface) of coil holding member
224b Radial outer end face of coil holding member (second face)
251 Bolt hole of coil holding member 252 Groove part 252a of coil holding member Groove opening (groove opening)
253 First through hole of coil holding member 254 Second through hole of coil holding member 254a Opening of second through hole (through hole opening)

Claims

Stator and
An iron core that is rotatably supported inside the stator in the radial direction and has a plurality of protrusions protruding outward in the radial direction arranged along the circumferential direction.
A winding wound around the outer periphery of the protrusion and
A coil holding member provided between the windings and
A groove formed on the first surface of the coil holding member facing the winding and extending from the inside in the radial direction to the outside in the radial direction.
It is provided with a first through hole that penetrates the coil holding member in the axial direction.
A rotary electric machine characterized in that the first through hole is formed so as to communicate with the groove portion.

Stator and
An iron core that is rotatably supported inside the stator in the radial direction and has a plurality of protrusions protruding outward in the radial direction arranged along the circumferential direction.
A winding wound around the outer periphery of the protrusion and
A coil holding member provided between the windings and
A groove formed on the first surface of the coil holding member facing the winding and extending from the inside in the radial direction to the outside in the radial direction.
It is provided with a first through hole that penetrates the coil holding member in the axial direction.
The coil holding member, the rotary electric machine you wherein those having a second through-hole groove and communicates with the first through hole.

The rotary electric machine according to claim 1 , wherein the coil holding member has a groove portion and a second through hole communicating with the first through hole.

The groove portion has a groove portion opening facing the second surface of the coil holding member facing the stator.
The second through hole has a through hole opening facing the second surface.
The rotary electric machine according to claim 2 or 3, wherein the distance between the through-hole opening and the stator is longer than the distance between the groove opening and the stator.