JP2016158343A - Stator of rotary electric machine - Google Patents

Stator of rotary electric machine Download PDF

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JP2016158343A
JP2016158343A JP2015033478A JP2015033478A JP2016158343A JP 2016158343 A JP2016158343 A JP 2016158343A JP 2015033478 A JP2015033478 A JP 2015033478A JP 2015033478 A JP2015033478 A JP 2015033478A JP 2016158343 A JP2016158343 A JP 2016158343A
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stator
axial direction
duct
along
electrical machine
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優人 本間
Masahito Homma
優人 本間
光良 江尻
Mitsuyoshi Ejiri
光良 江尻
正一 江島
Shoichi Ejima
正一 江島
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Electric Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine, capable of reducing imbalance of air flow balance in an axial direction.SOLUTION: In the stator of the rotary electric machine, which includes electromagnetic steel sheets 11 laminated in an axial direction and duct pieces 14 forming air ducts 13 inserted into a plurality of positions along the axis direction of the electromagnetic steel sheets 11 laminated in the axial direction, the duct pieces 14 are formed like rods and arranged so that the longitudinal direction of the duct piece is along a radial direction and an angle θi formed by a face on the rotational direction downstream side in a rotational direction of a rotor and a face on the radial direction inside is gradually reduced from the suction side to the exhaust side along the axial direction.SELECTED DRAWING: Figure 3

Description

本発明は、回転電機の固定子に関する。   The present invention relates to a stator of a rotating electrical machine.

従来、回転電機の固定子には、複数の電磁鋼板を積層して形成された固定子鉄心を備え、電磁鋼板の所定積層枚数位置ごとに配設されたダクトピースにより通風ダクトを形成したものが公知となっている（例えば、下記特許文献１参照）。   Conventionally, a stator of a rotating electrical machine has a stator core formed by laminating a plurality of electromagnetic steel plates, and a ventilation duct is formed by a duct piece arranged at every predetermined number of laminated positions of the electromagnetic steel plates. It is publicly known (see, for example, Patent Document 1 below).

また、通風ダクト入口における通風抵抗を低減し、周方向に複数配設されたダクトピースで区切られた通風ダクト間の通風量の不均衡を緩和するために、固定子鉄心の一つのティース部に配置され周方向に隣り合う複数のダクトピースの固定子鉄心内側先端の形状を、回転子の回転方向上流側に配設されたダクトピースと回転方向下流側に配設されたダクトピースとで異なる形状としたものも公知となっている（例えば、下記特許文献２，３参照）。   In addition, in order to reduce the ventilation resistance at the inlet of the ventilation duct and alleviate the imbalance in the ventilation volume between the ventilation ducts divided by a plurality of circumferentially arranged duct pieces, The shapes of the inner ends of the stator cores of the plurality of duct pieces arranged in the circumferential direction are different between the duct piece arranged on the upstream side in the rotational direction of the rotor and the duct piece arranged on the downstream side in the rotational direction. The shape is also known (for example, see Patent Documents 2 and 3 below).

特開２０００−９２７６１号公報JP 2000-92761 A 国際公開第２０１０／０６１６１１号公報International Publication No. 2010/061611 特許第３７９７７５２号公報Japanese Patent No. 3797752

ここで、例えば突極型片吸込エンジン発電機では、回転子コイル間にあるコイルオサエという構造物により、吸気側から回転子極間に入る軸方向の冷却ガスの風量が排気側にいくにつれ減少する。しかしながら、従来の回転電機の固定子は、軸方向の風量バランスを考慮していないため、上述したように冷却ガスの風量が吸気側から排気側へ向かうにしたがって減少するような構造を有する回転電機においては、軸方向の風量バランスに不均衡が生じるおそれがあるという問題があった。   Here, for example, in a salient pole type single suction engine generator, the structure of the coil spring between the rotor coils reduces the amount of axial cooling gas entering between the rotor poles from the intake side as it goes to the exhaust side. . However, since the stator of the conventional rotating electric machine does not consider the air volume balance in the axial direction, the rotating electric machine has a structure in which the air volume of the cooling gas decreases as it goes from the intake side to the exhaust side as described above. However, there is a problem that an imbalance may occur in the airflow balance in the axial direction.

このようなことから本発明は、軸方向の風量バランスの不均衡を低減することを可能とした回転電機の固定子を提供することを目的とする。   In view of the above, an object of the present invention is to provide a stator for a rotating electrical machine that can reduce the imbalance in the airflow balance in the axial direction.

上記の課題を解決するための第１の発明に係る回転電機の固定子は、
軸方向に積層された電磁鋼板と、積層された電磁鋼板に対し軸方向に沿う複数個所に挿入されて通風ダクトを形成するダクトピースとを有する回転電機の固定子において、
前記ダクトピースは、棒状に形成されるとともにその長手方向が半径方向に沿って配設され、回転子の回転方向に対して回転方向下流側の面と半径方向内側の面とがなす角度が軸方向に沿って吸気側から排気側へいくに従い小さくなっている
ことを特徴とする。 The stator of the rotating electrical machine according to the first invention for solving the above-described problem is
In a stator of a rotating electrical machine having electromagnetic steel plates laminated in the axial direction, and duct pieces that are inserted in a plurality of locations along the axial direction with respect to the laminated electromagnetic steel plates to form a ventilation duct,
The duct piece is formed in a rod shape and the longitudinal direction thereof is arranged along the radial direction, and the angle formed by the surface on the downstream side in the rotational direction and the surface on the radial direction with respect to the rotational direction of the rotor is an axis. It is characterized by decreasing in size along the direction from the intake side to the exhaust side.

また、第２の発明に係る回転電機の固定子は、
軸方向に積層された電磁鋼板と、積層された電磁鋼板に対し軸方向に沿う複数個所に挿入されて通風ダクトを形成するダクトピースとを有する回転電機の固定子において、
前記ダクトピースは、棒状に形成されるとともにその長手方向が半径方向に沿って配設され、半径方向外側の端部の位置が軸方向によらず一定である一方、半径方向に沿う長さが軸方向に沿って吸気側から排気側へいくに従い短くなっている
ことを特徴とする。 The stator of the rotating electrical machine according to the second invention is
In a stator of a rotating electrical machine having electromagnetic steel plates laminated in the axial direction, and duct pieces that are inserted in a plurality of locations along the axial direction with respect to the laminated electromagnetic steel plates to form a ventilation duct,
The duct piece is formed in a rod shape and the longitudinal direction thereof is arranged along the radial direction, and the position of the radially outer end is constant regardless of the axial direction, while the length along the radial direction is long. It is characterized in that it is shortened from the intake side to the exhaust side along the axial direction.

また、第３の発明に係る回転電機の固定子は、第１の発明に係る回転電機の固定子において、
前記ダクトピースは、半径方向外側の端部の位置が軸方向によらず一定である一方、半径方向に沿う長さが軸方向に沿って吸気側から排気側へいくに従い短くなっている
ことを特徴とする。 Further, the stator of the rotating electrical machine according to the third invention is the stator of the rotating electrical machine according to the first invention,
In the duct piece, the position of the radially outer end is constant regardless of the axial direction, while the length along the radial direction becomes shorter along the axial direction from the intake side to the exhaust side. Features.

本発明に係る回転電機の固定子によれば、軸方向の風量バランスを均一化することができるとともに通風ダクト入口における通風抵抗を低減することが可能となる。   According to the stator of the rotating electric machine according to the present invention, it is possible to make the air volume balance in the axial direction uniform and reduce the ventilation resistance at the inlet of the ventilation duct.

本発明の実施例１に係る回転電機の固定子を模式的に示す側面図である。It is a side view which shows typically the stator of the rotary electric machine which concerns on Example 1 of this invention. 本発明の実施例１に係る回転電機の固定子の一部を模式的に示す正面図である。It is a front view which shows typically a part of stator of the rotary electric machine which concerns on Example 1 of this invention. 図２の一部を拡大して示す拡大図であり、図３（ａ）は最も吸気側、図３（ｂ）は吸気側と排気側の間、図３（ｃ）は排気側を示す。3 is an enlarged view showing a part of FIG. 2, FIG. 3A shows the most intake side, FIG. 3B shows between the intake side and the exhaust side, and FIG. 3C shows the exhaust side. 本発明の実施例２に係る回転電機の固定子の一部を拡大して示す拡大図であり、図４（ａ）は最も吸気側、図４（ｂ）は吸気側と排気側の間、図４（ｃ）は排気側を示す。FIG. 4 is an enlarged view showing a part of the stator of the rotating electrical machine according to the second embodiment of the present invention, in which FIG. 4 (a) is the most intake side, FIG. 4 (b) is between the intake side and the exhaust side, FIG. 4C shows the exhaust side.

以下、図面を参照しつつ本発明に係る回転電機の固定子について詳細に説明する。なお、本発明は以下に示す実施例に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々の変更が可能であることは言うまでもない。   Hereinafter, a stator for a rotating electrical machine according to the present invention will be described in detail with reference to the drawings. Note that 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 spirit of the present invention.

図１から図３を用いて本発明の実施例１に係る回転電機の固定子について説明する。
図１に示すように、本実施例において回転電機の固定子は、軸方向に積層された多数枚の電磁鋼板１１を備えている。電磁鋼板１１は、複数枚ごとにブロック１２を構成し、隣接するブロック１２とブロック１２との間には通風ダクト（以下、固定子ダクトという）１３が設けられている。 A stator for a rotating electrical machine according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, in the present embodiment, the stator of the rotating electrical machine includes a large number of electromagnetic steel plates 11 stacked in the axial direction. The electromagnetic steel sheet 11 constitutes a block 12 for each of a plurality of sheets, and a ventilation duct (hereinafter referred to as a stator duct) 13 is provided between the adjacent blocks 12 and 12.

すなわち、図２に示すように、各ブロック１２の軸方向端部に配設された電磁鋼板１１には、周方向に所定のピッチで形成されたスロット１１ａとスロット１１ａとの間に、棒状のダクトピース１４がその長手方向を電磁鋼板１１の半径方向に向けて放射状に配設されており、このダクトピース１４により固定子ダクト１３が形成されている。   That is, as shown in FIG. 2, the electromagnetic steel sheet 11 disposed at the end of each block 12 in the axial direction has a rod-like shape between the slots 11a formed at a predetermined pitch in the circumferential direction. Duct pieces 14 are radially arranged with the longitudinal direction thereof in the radial direction of the electromagnetic steel sheet 11, and the stator duct 13 is formed by the duct pieces 14.

そして、本実施例においてダクトピース１４は、半径方向内側の端部からスロット１１ａの底部（以下、スロット底部という）１１ｂに対応する位置までの間の形状が、軸方向の位置に応じて相互に異なっている。具体的には、ダクトピース１４の半径方向内側の端部からスロット底部１１ｂに対応する位置までの間の形状（体積）が、吸気側ほど大きく、排気側に向かうにしたがって徐々に小さくなっている。   In this embodiment, the duct piece 14 has a shape between the end portion on the radially inner side and the position corresponding to the bottom portion of the slot 11a (hereinafter referred to as the slot bottom portion) 11b, depending on the position in the axial direction. Is different. Specifically, the shape (volume) from the radially inner end of the duct piece 14 to the position corresponding to the slot bottom 11b is larger toward the intake side and gradually decreases toward the exhaust side. .

より詳しくは、ダクトピース１４の総数をＮ，ダクトピース１４のスロット底部１１ｂに対応する位置から半径方向内側の端部までの回転方向上流側の長さ（上流側ダクトピース長さ）をＤｉ［ｍｍ］，ダクトピース１４のスロット底部１１ｂに対応する位置から半径方向内側の端部までの回転方向下流側の長さ（下流側ダクトピース長さ）をＤ［ｍｍ］とし、最も吸気側にあるダクトピース１４を１番目のダクトピース１４−１、最も排気側にあるダクトピース１４をＮ番目のダクトピース１４−Ｎとしたとき、本実施例では、ｉ番目（ｉ＝１，２，…，Ｎ）のダクトピース１４−ｉの上流側ダクトピース長さＤｉを下式（１）のように定めている。
Ｄｉ＝Ｄ（１−（ｉ−１）／Ｎ） …（１） More specifically, the total number of duct pieces 14 is N, and the upstream length in the rotational direction from the position corresponding to the slot bottom 11b of the duct piece 14 to the radially inner end (upstream duct piece length) is Di [ mm], and the length of the downstream side in the rotational direction (downstream duct piece length) from the position corresponding to the slot bottom 11b of the duct piece 14 to the radially inner end is D [mm]. When the duct piece 14 is the first duct piece 14-1, and the duct piece 14 on the most exhaust side is the Nth duct piece 14-N, in this embodiment, the i th (i = 1, 2,..., N) An upstream duct piece length Di of the duct piece 14-i is defined as in the following expression (1).
Di = D (1- (i-1) / N) (1)

これにより、図３（ａ）に示すように１番目のダクトピース１４−１が正面視矩形状（回転方向下流側の面と半径方向内側の面とがなす角度θ１がほぼ直角）であるのに対し、２番目以降のダクトピース１４−２〜１４−Ｎは図３（ｂ），（ｃ）に示すように正面視台形状、より具体的には、回転方向下流側の面と半径方向内側の面とがなす角度θｉ（ここではｉ＝２〜Ｎ）が鋭角に形成された台形状となり、かつ、角度θｉは吸気側から排気側に向かうにしたがって小さくなって、図３（ｃ）に示すようにＮ番目のダクトピース１４−Ｎの回転方向下流側の面と半径方向内側の面とがなす角度θＮが最も小さくなっている。   As a result, as shown in FIG. 3A, the first duct piece 14-1 has a rectangular shape in front view (the angle θ1 formed by the surface on the downstream side in the rotational direction and the surface on the radially inner side is substantially perpendicular). On the other hand, the second and subsequent duct pieces 14-2 to 14-N have a trapezoidal shape as shown in FIGS. 3B and 3C, more specifically, a surface on the downstream side in the rotational direction and a radial direction. The angle θi (here, i = 2 to N) formed by the inner surface has a trapezoidal shape formed with an acute angle, and the angle θi decreases from the intake side toward the exhaust side, and FIG. As shown in FIG. 4, the angle θN formed by the surface on the downstream side in the rotation direction of the Nth duct piece 14-N and the surface on the radially inner side is the smallest.

このように構成される本実施例に係る回転機械の固定子によれば、吸気側から排気側に向かうにしたがって回転子側からの冷却ガスを半径方向外側へ導く固定子ダクト１４の通風抵抗が小さくなるため、吸気側から排気側までの間の固定子ダクト１４の通風抵抗を一定にし、風量バランスを均一化して発電機全体の冷却効率を向上させることができる。   According to the stator of the rotating machine according to the present embodiment configured as described above, the ventilation resistance of the stator duct 14 that guides the cooling gas from the rotor side radially outward as it goes from the intake side to the exhaust side. Therefore, the ventilation resistance of the stator duct 14 between the intake side and the exhaust side can be made constant, the air volume balance can be made uniform, and the cooling efficiency of the entire generator can be improved.

すなわち、一例として突極型片吸込エンジン発電機を対象として考えると、吸気側から回転子極間に入る軸方向の冷却ガスは、回転子コイル間にあるコイルオサエという構造物により排気側にいくにつれ風量が減少する。また、ダクトピース１４を挟んで回転方向上流側と回転方向下流側とで通風ダクト１４の形状が同じである場合、風速が大きい場合はダクトピース１４よりも回転方向上流側に冷却ガスがよく流れ、風速が小さい場合はダクトピース１４よりも回転方向下流側に冷却ガスがよく流れる。   In other words, when considering a salient pole type single suction engine generator as an example, the axial cooling gas entering between the rotor poles from the intake side goes to the exhaust side by a structure called a coil spring between the rotor coils. Air volume decreases. When the shape of the ventilation duct 14 is the same between the upstream side in the rotational direction and the downstream side in the rotational direction across the duct piece 14, the cooling gas flows more upstream in the rotational direction than the duct piece 14 when the wind speed is high. When the wind speed is low, the cooling gas flows well downstream of the duct piece 14 in the rotational direction.

よって吸気側の風速が大きく排気側の風速が小さい場合、吸気側から排気側にかけて回転方向上流側の風量Ｑｉと回転方向下流側の風量ＱはＱｉ>Ｑ，Ｑｉ≒Ｑ，Ｑｉ＜Ｑと変化し、軸方向の風量バランスに不均衡が生じる。   Therefore, when the wind speed on the intake side is large and the wind speed on the exhaust side is small, the air volume Qi on the upstream side in the rotational direction and the air volume Q on the downstream side in the rotational direction vary from Qi> Q, Qi≈Q, Qi <Q from the intake side to the exhaust side. However, an imbalance occurs in the airflow balance in the axial direction.

これに対し、本実施例に係る回転電機の固定子では、吸気側から排気側に向かって冷却ガスの風量が減少すること、及び回転方向上流側の風量Ｑｉと回転方向下流側の風量Ｑとの風量バランスを考慮し、図３に示し上述したようにダクトピース１４の形状を排気側に向かうにしたがって回転方向下流側の面と半径方向内側の面とがなす角度θｉが小さくなるようにしたことにより、軸方向及び回転方向の風量バランスの不均衡を低減することを可能としている。   In contrast, in the stator of the rotating electrical machine according to the present embodiment, the air volume of the cooling gas decreases from the intake side to the exhaust side, and the air volume Qi on the upstream side in the rotational direction and the air volume Q on the downstream side in the rotational direction. As shown in FIG. 3 and described above, the angle θi formed by the surface on the downstream side in the rotational direction and the surface on the radially inner side becomes smaller as the shape of the duct piece 14 is directed toward the exhaust side. This makes it possible to reduce the imbalance in the air volume balance between the axial direction and the rotational direction.

図１，２及び図４を用いて本発明の実施例２に係る回転電機の固定子について説明する。
本実施例は、図３に示し上述した実施例１のダクトピース１４に代えて、図４に示すダクトピース１５を適用するものである。それ以外の基本的な構造については実施例１と概ね同様であり、以下、重複する説明は省略し異なる部分を中心に説明する。 A stator for a rotating electrical machine according to a second embodiment of the present invention will be described with reference to FIGS.
In this embodiment, a duct piece 15 shown in FIG. 4 is applied instead of the duct piece 14 of the first embodiment shown in FIG. The rest of the basic structure is substantially the same as that of the first embodiment, and the following description will be made with a focus on the different parts while omitting the overlapping description.

本実施例においてダクトピース１５（１５−１〜１５−N）は、半径方向内側の端部からスロット底部１１ｂに対応する位置までの間の形状が、軸方向の位置に応じて相互に異なっている。具体的には、ダクトピース１５の半径方向外側の端部の位置が軸方向によらず一定である一方、ダクトピース１５の長さが排気側に向かうにしたがって徐々に短くなっている。これにより、ダクトピース１５の半径方向内側の端部の位置は排気側に向かうにしたがって徐々に半径方向外側に位置するようになっている。   In the present embodiment, the duct pieces 15 (15-1 to 15-N) have different shapes from the radially inner end to the position corresponding to the slot bottom 11b depending on the position in the axial direction. Yes. Specifically, the position of the radially outer end of the duct piece 15 is constant regardless of the axial direction, while the length of the duct piece 15 is gradually shortened toward the exhaust side. As a result, the position of the radially inner end of the duct piece 15 is gradually positioned on the radially outer side toward the exhaust side.

より詳しくは、ダクトピース１５の総数をＮ，ダクトピース１５のスロット底部１１ｂに対応する位置から半径方向内側の端部までの長さ（ダクトピース長さ）をＤｉ［ｍｍ］とし、最も吸気側にあるダクトピースを１番目のダクトピース、最も排気側にあるダクトピースをＮ番目のダクトピースとしたとき、本実施例では、ｉ番目（ｉ＝１，２，…，Ｎ）のダクトピース長さＤｉを下式（２）のように定める。
Ｄｉ＝Ｄ（１−（ｉ−１）／Ｎ） …（２） More specifically, the total number of duct pieces 15 is N, and the length (duct piece length) from the position corresponding to the slot bottom 11b of the duct piece 15 to the radially inner end is Di [mm]. In this embodiment, the i-th (i = 1, 2,..., N) duct piece length is assumed to be the first duct piece and the N-th duct piece on the exhaust side. Di is defined as in the following equation (2).
Di = D (1- (i-1) / N) (2)

これにより、図４（ａ）に示すように１番目のダクトピース１５−１に対し、図４（ｂ），（ｃ）に示すように２番目以降のダクトピース１５−２〜１５−Ｎは段階的にダクトピース長さＤｉ（ここではｉ＝２〜Ｎ）が短くなり、図４（ｃ）に示すＮ番目のダクトピース１５−Ｎのダクトピース長さＤｉが最も短くなっている。   As a result, as shown in FIG. 4A, the second and subsequent duct pieces 15-2 to 15-N as shown in FIGS. The duct piece length Di (here, i = 2 to N) is gradually reduced, and the duct piece length Di of the Nth duct piece 15-N shown in FIG.

このように構成される本実施例に係る回転電機の固定子によれば、排気側にいくにつれ回転子側からの風を上部へ通す固定子ダクト入口の通風抵抗を小さくし、吸気側と排気側およびその間の通風抵抗を一定にし、風量バランスを均一化することで発電機全体の冷却効率を向上させることができる。   According to the stator of the rotating electrical machine according to the present embodiment configured as described above, the ventilation resistance at the entrance of the stator duct through which the wind from the rotor side passes upward as it goes to the exhaust side is reduced, and the intake side and the exhaust are The cooling efficiency of the whole generator can be improved by making the ventilation resistance between the sides constant and making the air volume balance uniform.

すなわち上述したように、例えば突極型片吸込エンジン発電機を対象として考えると、吸気側から回転子極間に入る軸方向の冷却ガスは回転子コイル間にあるコイルオサエという構造物により排気側にいくにつれ風量が減少し、周方向及び径方向の風量も吸気側から排気側にいくに従い減少する。また、固定子ダクト１３を通過する風量Ｑｉ（ｉ＝１，２，…，Ｎ）に関しても吸気側から排気側にいくにつれ減少する。このように軸方向に関して固定子ダクト１３の風量が不均一となると、温度斑が生じるという問題が生じる。   That is, as described above, for example, when considering a salient pole type single suction engine generator, the axial cooling gas that enters between the rotor poles from the intake side is moved to the exhaust side by a structure called a coil spring between the rotor coils. As the air volume decreases, the air volume in the circumferential direction and the radial direction also decreases as it moves from the intake side to the exhaust side. Further, the air volume Qi (i = 1, 2,..., N) passing through the stator duct 13 also decreases as it goes from the intake side to the exhaust side. Thus, when the air volume of the stator duct 13 becomes non-uniform in the axial direction, there arises a problem that temperature spots occur.

これに対し、本実施例に係る回転電機の固定子では、図４に示し上述したように、ダクトピース１５の形状を上記（２）式に基づき吸気側から排気側にいくに従い短くして、固定子ダクト１３の入口の通風抵抗を排気側にいくほど小さくしたことにより、軸方向の風量を一定にすることができるため、軸方向に関して固定子ダクト１３内の風量を均一化し、温度斑の発生を抑制することを可能としている。   On the other hand, in the stator of the rotating electrical machine according to the present embodiment, as shown in FIG. 4 and described above, the shape of the duct piece 15 is shortened from the intake side to the exhaust side based on the above equation (2). Since the airflow resistance at the entrance of the stator duct 13 is reduced toward the exhaust side, the airflow in the axial direction can be made constant. Therefore, the airflow in the stator duct 13 is made uniform in the axial direction, and temperature fluctuations are prevented. It is possible to suppress the occurrence.

上述した実施例１，２に対し、棒状に形成され、長手方向を半径方向に沿って配設されたダクトピースを、半径方向外側の端部の位置が軸方向によらず一定でかつ半径方向に沿う長さが軸方向に沿って吸気側から排気側へいくに従い短くなるようにするとともに、回転子の回転方向に対して回転方向下流側の面と半径方向内側の面とがなす角度が軸方向に沿って吸気側から排気側へいくに従い小さくなるようにしてもよい。このような構成とすれば、より効果的に軸方向の風量バランスの不均衡を低減し、かつ温度斑の発生を抑制することが可能となる。   Compared to the first and second embodiments described above, the duct piece formed in a rod shape and disposed in the longitudinal direction along the radial direction has a constant radial outer end position regardless of the axial direction and the radial direction. The length along the axial direction becomes shorter as it goes from the intake side to the exhaust side along the axial direction, and the angle formed between the surface on the downstream side in the rotational direction and the surface on the radially inner side with respect to the rotational direction of the rotor is You may make it small as it goes to an exhaust side from an intake side along an axial direction. With such a configuration, it is possible to more effectively reduce the imbalance in the axial air volume balance and suppress the occurrence of temperature spots.

本発明は、ダクトピースを配設することにより形成された通風ダクトを備える回転電機の固定子に適用して好適なものである。   The present invention is suitable for application to a stator of a rotating electric machine including a ventilation duct formed by arranging a duct piece.

１１ 電磁鋼板
１１ａ スロット
１１ｂ スロット底部
１２ ブロック
１３ 固定子ダクト
１４，１４−１〜１４−Ｎ，１５−１〜１５−Ｎ ダクトピース 11 Magnetic Steel Sheet 11a Slot 11b Slot Bottom 12 Block 13 Stator Duct 14, 14-1 to 14-N, 15-1 to 15-N Duct Piece

Claims (3)

軸方向に積層された電磁鋼板と、積層された電磁鋼板に対し軸方向に沿う複数個所に挿入されて通風ダクトを形成するダクトピースとを有する回転電機の固定子において、
前記ダクトピースは、棒状に形成されるとともにその長手方向が半径方向に沿って配設され、回転子の回転方向に対して回転方向下流側の面と半径方向内側の面とがなす角度が軸方向に沿って吸気側から排気側へいくに従い小さくなっている
ことを特徴とする回転電機の固定子。 In a stator of a rotating electrical machine having electromagnetic steel plates laminated in the axial direction, and duct pieces that are inserted in a plurality of locations along the axial direction with respect to the laminated electromagnetic steel plates to form a ventilation duct,
The duct piece is formed in a rod shape and the longitudinal direction thereof is arranged along the radial direction, and the angle formed by the surface on the downstream side in the rotational direction and the surface on the radial direction with respect to the rotational direction of the rotor is an axis. A stator for a rotating electrical machine, wherein the stator becomes smaller along the direction from the intake side to the exhaust side. 軸方向に積層された電磁鋼板と、積層された電磁鋼板に対し軸方向に沿う複数個所に挿入されて通風ダクトを形成するダクトピースとを有する回転電機の固定子において、
前記ダクトピースは、棒状に形成されるとともにその長手方向が半径方向に沿って配設され、半径方向外側の端部の位置が軸方向によらず一定である一方、半径方向に沿う長さが軸方向に沿って吸気側から排気側へいくに従い短くなっている
ことを特徴とする回転電機の固定子。 In a stator of a rotating electrical machine having electromagnetic steel plates laminated in the axial direction, and duct pieces that are inserted in a plurality of locations along the axial direction with respect to the laminated electromagnetic steel plates to form a ventilation duct,
The duct piece is formed in a rod shape and the longitudinal direction thereof is arranged along the radial direction, and the position of the radially outer end is constant regardless of the axial direction, while the length along the radial direction is long. A stator for a rotating electrical machine, which is shortened from an intake side to an exhaust side along an axial direction. 請求項１に係る回転電機の固定子において、
前記ダクトピースは、半径方向外側の端部の位置が軸方向によらず一定である一方、半径方向に沿う長さが軸方向に沿って吸気側から排気側へいくに従い短くなっている
ことを特徴とする回転電機の固定子。 In the stator of the rotating electrical machine according to claim 1,
In the duct piece, the position of the radially outer end is constant regardless of the axial direction, while the length along the radial direction becomes shorter along the axial direction from the intake side to the exhaust side. A stator for a rotating electrical machine.
JP2015033478A 2015-02-24 2015-02-24 Stator of rotary electric machine Pending JP2016158343A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021072714A (en) * 2019-10-31 2021-05-06 株式会社日立インダストリアルプロダクツ Rotary electric machine and rotary electric machine system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021072714A (en) * 2019-10-31 2021-05-06 株式会社日立インダストリアルプロダクツ Rotary electric machine and rotary electric machine system
JP7359649B2 (en) 2019-10-31 2023-10-11 株式会社日立インダストリアルプロダクツ Rotating electric machines and rotating electric machine systems

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