JP7137427B2 - Wire-wound rotary electric machine - Google Patents

Wire-wound rotary electric machine Download PDF

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JP7137427B2
JP7137427B2 JP2018188184A JP2018188184A JP7137427B2 JP 7137427 B2 JP7137427 B2 JP 7137427B2 JP 2018188184 A JP2018188184 A JP 2018188184A JP 2018188184 A JP2018188184 A JP 2018188184A JP 7137427 B2 JP7137427 B2 JP 7137427B2
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rotor
brush
circuit prevention
phase
rotor shaft
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JP2020058163A (en
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敬太 山下
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Toshiba Mitsubishi Electric Industrial Systems Corp
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Toshiba Mitsubishi Electric Industrial Systems Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/003—Structural associations of slip-rings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Induction Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)

Description

本発明は、巻線形回転電機に関する。 The present invention relates to a wound rotating electric machine.

同期機、あるいは巻線形誘導電動機などの巻線形回転電機においては、通常、回転子巻線に３相の交流を流すために、静止側から回転子巻線側に、各相の電力を供給する。各相の回転子巻線は、それぞれ、ロータシャフトの軸方向の一方に設けられたそれぞれに対応するスリップリングに接続されている。一方、静止側の配線はそれぞれの相において、スリップリングの径方向外側に設けられたブラシに接続されている。 In a wound-rotor electric machine such as a synchronous machine or a wound-rotor induction motor, power of each phase is normally supplied from the stationary side to the rotor winding side in order to allow three-phase alternating current to flow through the rotor windings. . The rotor windings of each phase are connected to corresponding slip rings provided on one side of the rotor shaft in the axial direction. On the other hand, the wiring on the stationary side is connected to a brush provided radially outside the slip ring for each phase.

特許第４３３９７６１号公報Japanese Patent No. 4339761

たとえば、３相の回転電機では、前記のように各相の巻線に接続されている３つのスリップリングが、ロータシャフトの端部付近に、軸方向に互いに間隔をおいて取り付けられている。それぞれのスリップリングと接触して電気的に導通する静止側の各相のブラシは、それぞれブラシホルダーにより支持されているので、各相のブラシおよびブラシホルダーも、軸方向に互いに間隔をおいて配されている。この結果、ある相のブラシおよびブラシホルダーと、その軸方向に隣接する相のブラシおよびブラシホルダーとの間には、相間電圧が印加される。 For example, in a three-phase rotating electrical machine, three slip rings connected to the windings of each phase as described above are mounted axially spaced apart from each other near the end of the rotor shaft. The brushes of each phase on the stationary side, which are in contact with the respective slip rings and are electrically connected, are supported by respective brush holders. It is As a result, a phase-to-phase voltage is applied between the brushes and brush-holders of one phase and the brushes and brush-holders of its axially adjacent phase.

図４は、従来の巻線形回転電機の回転子端部近傍における回転側と静止側の構成例を示す縦断面図である。また、図５は、ある一つの相についての回転側と静止側の構成例を示す横断面図である。図５が示すのがたとえばＵ相であるとする。Ｕ相のスリップリング１５は、回転子巻線のうちのＵ相のみと電気的に接続している。Ｕ相のスリップリング１５の径方向外側には、静止側のＵ相のブラシ６１およびブラシホルダー６２が配されている。 FIG. 4 is a longitudinal sectional view showing a configuration example of a rotating side and a stationary side in the vicinity of the end of a rotor of a conventional wire-wound rotating electric machine. Also, FIG. 5 is a cross-sectional view showing a configuration example of a rotating side and a stationary side for one phase. Suppose that FIG. 5 shows, for example, the U phase. The U-phase slip ring 15 is electrically connected only to the U-phase of the rotor windings. A static side U-phase brush 61 and a brush holder 62 are arranged radially outside the U-phase slip ring 15 .

Ｕ相とＶ相の間、Ｖ相とＷ相との間、およびＵ相の外側、Ｗ相の外側には、それぞれ、絶縁板７０が設けられている。しかしながら、定期的な清掃時の不備や、ブラシリードが隣接する相に近接した場合など、相間短絡を惹き起こす可能性がある。 Insulating plates 70 are provided between the U and V phases, between the V and W phases, and outside the U and W phases, respectively. However, imperfections during periodic cleaning or when brush leads are in close proximity to adjacent phases can cause phase-to-phase shorts.

そこで、本発明は、巻線形回転電機の回転子端部近傍における相間短絡の可能性を低減することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the possibility of an interphase short circuit near the end of a rotor of a wound-rotor electrical machine.

上述の目的を達成するため、本発明に係る巻線形回転電機は、ロータシャフトと、前記ロータシャフトの径方向外側に取り付けられた回転子鉄心と、前記回転子鉄心を貫通する複数の回転子巻線と、前記ロータシャフトに取り付けられて前記複数の回転子巻線とそれぞれ電気的に結合する複数のスリップリングとを有する回転子と、前記回転子鉄心の径方向外側に設けられた固定子鉄心と、前記固定子鉄心を貫通する固定子巻線とを有する固定子と、前記複数のスリップリングのそれぞれと摺動するブラシを保持し外部ケーブルと結合する複数のブラシホルダーと、前記複数のブラシホルダーのそれぞれを軸方向に挟むように静止支持され、軸方向に投影した範囲内に前記複数のブラシホルダーを投影した範囲を含むように形成された絶縁材からなる複数の相間短絡防止板と、を有する静止側伝送部と、を備え、前記複数の相間短絡防止板のそれぞれには、前記ブラシホルダーと軸方向に対向しない複数の通風孔と、前記ブラシホルダーと軸方向に対向する通風孔と、が形成され、前記ブラシホルダーと軸方向に対向しない前記複数の通風孔のうちの一部は、前記ブラシにおいて前記ブラシホルダーから前記ロータシャフトの径方向外側に突出した部分と軸方向に対向し、前記複数のブラシホルダーおよび前記複数の相間短絡防止板は、前記回転子から離間した、ことを特徴とする。 In order to achieve the above object, a wound-rotor rotating electrical machine according to the present invention includes a rotor shaft, a rotor core mounted radially outwardly of the rotor shaft, and a plurality of rotor windings penetrating the rotor core. a rotor having a wire and a plurality of slip rings attached to the rotor shaft and electrically coupled to the plurality of rotor windings; and a stator core provided radially outside the rotor core. , a stator winding penetrating the stator core, a plurality of brush holders holding brushes sliding on each of the plurality of slip rings and coupled to an external cable, the plurality of brushes. a plurality of interphase short-circuit prevention plates made of an insulating material, which are stationary supported so as to sandwich each of the holders in the axial direction, and which are formed so as to include the projected range of the plurality of brush holders within the projected range in the axial direction; each of the plurality of interphase short-circuit prevention plates includes a plurality of ventilation holes that do not face the brush holder in the axial direction, and a ventilation hole that faces the brush holder in the axial direction. are formed , and some of the plurality of ventilation holes that are not axially opposed to the brush holder are axially opposed to portions of the brush protruding radially outward of the rotor shaft from the brush holder. and the plurality of brush holders and the plurality of interphase short circuit prevention plates are separated from the rotor .

本発明によれば、巻線形回転電機の回転子端部近傍における相間短絡の可能性を低減することができる。 Advantageous Effects of Invention According to the present invention, it is possible to reduce the possibility of short-circuiting between phases in the vicinity of the rotor end of a wound-rotor rotating electrical machine.

実施形態に係る巻線形回転電機の構成を示す縦断面図である。1 is a vertical cross-sectional view showing the configuration of a wound rotating electrical machine according to an embodiment; FIG. 実施形態に係る巻線形回転電機の回転子端部近傍における回転側と静止側の構成を示す縦断面図である。FIG. 2 is a vertical cross-sectional view showing the configuration of the rotating side and the stationary side in the vicinity of the rotor end of the wound-rotor rotating electrical machine according to the embodiment; 実施形態に係る巻線形回転電機の回転子端部近傍におけるある一つの相についての回転側と静止側の構成例を示す横断面図である。FIG. 3 is a cross-sectional view showing a configuration example of a rotating side and a stationary side of one phase in the vicinity of the rotor end of the wound-rotor rotating electrical machine according to the embodiment; 従来の巻線形回転電機の回転子端部近傍における回転側と静止側の構成例を示す縦断面図である。FIG. 10 is a vertical cross-sectional view showing a configuration example of a rotating side and a stationary side in the vicinity of a rotor end of a conventional wound-rotor electrical machine; 従来の巻線形回転電機の回転子端部近傍におけるある一つの相についての回転側と静止側の構成例を示す横断面図である。FIG. 10 is a cross-sectional view showing a configuration example of a rotating side and a stationary side for one phase in the vicinity of a rotor end of a conventional wound-rotor electrical machine;

以下、図面を参照して、本発明の実施形態に係る巻線型回転電機について説明する。ここで、互いに同一または類似の部分には、共通の符号を付して、重複説明は省略する。 A wound rotating electric machine according to an embodiment of the present invention will be described below with reference to the drawings. Here, parts that are the same or similar to each other are denoted by common reference numerals, and repeated explanations are omitted.

図１は、実施形態に係る巻線形回転電機の構成を示す縦断面図である。巻線形回転電機２００は、回転子１０、固定子２０、２つの軸受３０、フレーム４０、２つの軸受ブラケット４５、静止側伝送部６０を有する。 FIG. 1 is a vertical cross-sectional view showing the configuration of a wound rotating electrical machine according to an embodiment. A wound rotating electrical machine 200 has a rotor 10 , a stator 20 , two bearings 30 , a frame 40 , two bearing brackets 45 and a stationary side transmission section 60 .

回転子１０は、水平方向に延びるロータシャフト１１、ロータシャフト１１の径方向外側に取り付けられた回転子鉄心１２、および回転子鉄心１２を貫通する複数の回転子巻線１３を有する。ロータシャフト１１は、回転子鉄心１２の両外側のそれぞれで軸受３０に支持されている。回転子巻線１３は、回転子鉄心１２の外周近傍に周方向に互いに間隔をおいて形成された複数の回転子スロット（図示せず）内を貫通し、回転子鉄心１２の軸方向の両外側において互いに接続され、あるいは静止側伝送部６０を介して、外部と電気的に結合される。 The rotor 10 has a horizontally extending rotor shaft 11 , a rotor core 12 mounted radially outwardly of the rotor shaft 11 , and a plurality of rotor windings 13 passing through the rotor core 12 . The rotor shaft 11 is supported by bearings 30 on both outer sides of the rotor core 12 . The rotor windings 13 pass through a plurality of rotor slots (not shown) formed in the vicinity of the outer circumference of the rotor core 12 at intervals in the circumferential direction, and extend through both axial ends of the rotor core 12 . They are connected to each other on the outside, or electrically coupled to the outside via the stationary side transmission section 60 .

固定子２０は、回転子鉄心１２の径方向の外側に配された円筒状の固定子鉄心２１、および固定子鉄心２１を貫通する固定子巻線２２を有する。 The stator 20 has a cylindrical stator core 21 arranged radially outside the rotor core 12 and a stator winding 22 passing through the stator core 21 .

回転子鉄心１２および固定子２０は、固定子２０の径方向外側に配されたフレーム４０に収納されている。フレーム４０の軸方向の両側の端部には、それぞれ軸受ブラケット４５が取り付けられている。それぞれの軸受ブラケット４５は、それぞれの軸受３０を静止支持している。 The rotor core 12 and the stator 20 are housed in a frame 40 arranged radially outside the stator 20 . Bearing brackets 45 are attached to both ends of the frame 40 in the axial direction. Each bearing bracket 45 statically supports a respective bearing 30 .

図２は、実施形態に係る巻線形回転電機の回転子端部近傍における回転側と静止側の構成を示す縦断面図である。また、図３は、実施形態に係る巻線形回転電機の回転子端部近傍におけるある一つの相についての回転側と静止側の構成例を示す横断面図である。 FIG. 2 is a vertical cross-sectional view showing the configuration of the rotating side and the stationary side in the vicinity of the end of the rotor of the wire-wound rotating electrical machine according to the embodiment. FIG. 3 is a cross-sectional view showing a configuration example of a rotating side and a stationary side of one phase in the vicinity of the rotor end of the wound-rotor electrical machine according to the embodiment.

ロータシャフト１１の端部には、冷却ファン５０が取り付けられている。冷却ファン５０は、ロータシャフト１１の端部近傍を収納する回転接続部カバー５１内において、空気などの冷却用気体を循環駆動する。 A cooling fan 50 is attached to the end of the rotor shaft 11 . The cooling fan 50 drives and circulates a cooling gas such as air in a rotary connection portion cover 51 that houses the vicinity of the end portion of the rotor shaft 11 .

冷却ファン５０の軸方向の内側のロータシャフト１１の部分には、Ｕ相、Ｖ相およびＷ相の３つの相に対応するそれぞれのスリップリング１５が、軸方向に互いに間隙を空けて、取り付けられている。それぞれのスリップリング１５間の間隙には、絶縁管１６が設けられている。それぞれのスリップリング１５は、回転子巻線１３の各相とそれぞれ接続されている。たとえば、Ｕ相については、回転子巻線１３のＵ相と接続する引き出し線１３ａがロータシャフト１１内を経由してロータシャフト１１の端部の外側まで引き回されている。引き出し線１３ａは、さらに他と電気的に絶縁された状態で延びてＵ相のスリップリング１５に接続されている。Ｖ相およびＷ相についても同様に、回転子巻線１３からそれぞれのスリップリング１５までの電気配線部分は、それぞれ、他の相および周囲とは電気的に絶縁されている。 Slip rings 15 corresponding to the three phases of U phase, V phase and W phase are mounted axially spaced apart from each other on a portion of the rotor shaft 11 axially inside the cooling fan 50 . ing. An insulating tube 16 is provided in the gap between each slip ring 15 . Each slip ring 15 is connected to each phase of the rotor winding 13 . For example, for the U-phase, a lead wire 13 a connected to the U-phase of the rotor winding 13 is routed through the rotor shaft 11 to the outside of the end of the rotor shaft 11 . The lead wire 13a extends while being electrically insulated from others and is connected to a U-phase slip ring 15 . Similarly for the V-phase and W-phase, the electrical wiring portions from the rotor winding 13 to each slip ring 15 are electrically insulated from the other phases and the surroundings, respectively.

回転側の回路、すなわち回転子巻線１３、引き出し部１３ａおよびスリップリング１５は、スリップリング１５と静止側伝送部６０のブラシ６１とが接触することにより、静止側の回路と電気的に接続している。静止側伝送部６０は、３つの相別静止側伝送部６０ａを有し、それぞれの相に対応する相別静止側伝送部６０ａは、ブラシ６１、ブラシホルダー６２、連結線６３、連結支持ロッド６８、および相間短絡防止板１００を有する。 The rotating side circuit, that is, the rotor winding 13, the lead-out portion 13a, and the slip ring 15 are electrically connected to the stationary side circuit by the contact between the slip ring 15 and the brush 61 of the stationary side transmission portion 60. ing. The stationary-side transmission unit 60 has three phase-specific stationary-side transmission units 60a. , and an interphase short circuit prevention plate 100 .

ブラシ６１のスリップリング１５との接触面は、スリップリング１５の表面に対応するような曲面に形成さている。この結果、ブラシ６１は、できるだけ広い面積でスリップリング１５と摺動可能に形成されている。 A contact surface of the brush 61 with the slip ring 15 is formed into a curved surface corresponding to the surface of the slip ring 15 . As a result, the brush 61 is slidably formed on the slip ring 15 over as wide an area as possible.

このため、図３に示すように、それぞれの相においては、４つのブラシ６１が、スリップリング１５の径方向外側から、それぞれ、スリップリング１５に向かって押し付けられている。４つブラシ６１は、２つずつ同一のブラシホルダー６２により保持されている。それぞれのブラシホルダー６２は、その両端近傍を貫通する２つの連結支持ロッド６８によって、支持されている。なお、連結支持ロッド６８により３つの相のブラシホルダー６２が機械的には結合しているが、電気的には絶縁されるように、連結支持ロッド６８の全体あるいはブラシホルダー６２との結合部分は、絶縁体で形成されている。 Therefore, as shown in FIG. 3 , in each phase, four brushes 61 are pressed toward the slip ring 15 from the radially outer side of the slip ring 15 . The four brushes 61 are held by two identical brush holders 62 . Each brush holder 62 is supported by two connecting support rods 68 penetrating near both ends thereof. Although the three-phase brush holders 62 are mechanically connected by the connection support rod 68, the entire connection support rod 68 or the portion connected to the brush holder 62 is electrically insulated. , is made of an insulator.

ブラシホルダー６２の両端には端子板６２ａが設けられており、一方の端子板６２ａは、端子６４ａにより外部ケーブル６４と接続可能に形成されている。また、他方の端子板６２ａは、別のブラシホルダー６２に設けられた端子板６２ａとの間で、端子６３ａで接続された連結線６３により電気的に結合されている。 Terminal plates 62a are provided at both ends of the brush holder 62, and one terminal plate 62a is formed to be connectable to an external cable 64 via a terminal 64a. The other terminal plate 62a is electrically connected to a terminal plate 62a provided on another brush holder 62 by a connecting wire 63 connected by a terminal 63a.

ブラシホルダー６２の周方向位置は、たとえば、上半部にあるとメンテナンス時に取り扱いやすい等で設定すればよい。 The position of the brush holder 62 in the circumferential direction may be set, for example, so that it is easy to handle during maintenance when it is located in the upper half.

各相のそれぞれのブラシホルダー６２の間の軸方向位置、軸方向の最も外側のブラシホルダー６２のさらに軸方向の外側位置、および軸方向の最も内側のブラシホルダー６２のさらに軸方向の内側位置には、相間短絡防止板１００がそれぞれ設けられている。相間短絡防止板１００は、同一のブラシホルダー６２を支持する２本の連結支持ロッド６８により、同様に支持されている。 at axial positions between respective brush holders 62 of each phase, further axially outer positions of the axially outermost brush holders 62, and further axially inner positions of the axially innermost brush holders 62. are provided with interphase short-circuit prevention plates 100, respectively. The interphase short circuit prevention plate 100 is similarly supported by two connecting support rods 68 that support the same brush holder 62 .

軸方向に投影すると、ブラシホルダー６２は、相間短絡防止板１００の範囲内に収まるような大きさに相間短絡防止板１００が形成されている。また、ブラシ６１のスリップリング１５との密着部近傍を除いて、ブラシ６１も、相間短絡防止板１００の範囲内に収まるような大きさに、相間短絡防止板１００が形成されている。 The inter-phase short-circuit prevention plate 100 is formed in such a size that the brush holder 62 fits within the range of the inter-phase short-circuit prevention plate 100 when projected in the axial direction. In addition, the interphase short circuit prevention plate 100 is formed in such a size that the brush 61 is also within the range of the interphase short circuit prevention plate 100 except for the vicinity of the contact portion of the brush 61 with the slip ring 15 .

相間短絡防止板１００には、複数の通風孔１０１が形成されている。回転接続部カバー５１内のロータシャフト１１の端部に取り付けられている冷却ファン５０から、冷却風が回転接続部カバー５１内に送られる。相間短絡防止板１００に複数の通風孔１０１が形成されていることにより、回転接続部カバー５１内の冷却風の循環が確保される。 A plurality of ventilation holes 101 are formed in the interphase short circuit prevention plate 100 . Cooling air is sent into the rotary connection cover 51 from a cooling fan 50 attached to the end of the rotor shaft 11 inside the rotary connection cover 51 . A plurality of ventilation holes 101 are formed in the interphase short-circuit prevention plate 100 to ensure circulation of cooling air in the rotary connection portion cover 51 .

したがって、相間短絡防止板１００の設置によって、回転接続部カバー５１内の冷却風の循環の低下を最小限に留めながら、巻線形回転電機の回転子端部近傍における相間短絡の可能性を低減することができる。 Therefore, the installation of the interphase short circuit prevention plate 100 reduces the possibility of interphase short circuit in the vicinity of the end of the rotor of the wound-rotor electrical machine while minimizing the deterioration of the circulation of the cooling air in the rotary connection cover 51. be able to.

［その他の実施形態］
以上、本発明の実施形態を説明したが、実施形態は例として提示したものであり、発明の範囲を限定することは意図していない。 [Other embodiments]
Although the embodiments of the present invention have been described above, the embodiments are presented as examples and are not intended to limit the scope of the invention.

さらに、実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。 Furthermore, the embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the gist of the invention.

実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 The embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and its equivalents.

１０…回転子、１１…ロータシャフト、１２…回転子鉄心、１３…回転子巻線、１３ａ…引き出し部、１５…スリップリング、１６…絶縁管、２０…固定子、２１…固定子鉄心、２２…固定子巻線、３０…軸受、４０…フレーム、４５…軸受ブラケット、５０…冷却ファン、５１…回転接続部カバー、６０…静止側伝送部、６０ａ…相別静止側伝送部、６１…ブラシ、６２…ブラシホルダー、６２ａ…端子板、６３…連結線、６３ａ…端子、６４…外部ケーブル、６４ａ…端子、６８…連結支持ロッド、７０…絶縁板、１００…相間短絡防止板、１０１…通風孔、２００…巻線形回転電機 DESCRIPTION OF SYMBOLS 10... Rotor, 11... Rotor shaft, 12... Rotor core, 13... Rotor winding, 13a... Drawer part, 15... Slip ring, 16... Insulating tube, 20... Stator, 21... Stator core, 22 1. Stator winding 30. Bearing 40. Frame 45. Bearing bracket 50. Cooling fan 51. Rotary connection cover 60. Stationary transmission unit 60a. , 62... Brush holder, 62a... Terminal plate, 63... Connecting line, 63a... Terminal, 64... External cable, 64a... Terminal, 68... Connecting support rod, 70... Insulating plate, 100... Inter-phase short-circuit prevention plate, 101... Ventilation Hole 200... Wound rotary electric machine

Claims (3)

ロータシャフトと、前記ロータシャフトの径方向外側に取り付けられた回転子鉄心と、前記回転子鉄心を貫通する複数の回転子巻線と、前記ロータシャフトに取り付けられて前記複数の回転子巻線とそれぞれ電気的に結合する複数のスリップリングとを有する回転子と、
前記回転子鉄心の径方向外側に設けられた固定子鉄心と、前記固定子鉄心を貫通する固定子巻線とを有する固定子と、
前記複数のスリップリングのそれぞれと摺動するブラシを保持し外部ケーブルと結合する複数のブラシホルダーと、前記複数のブラシホルダーのそれぞれを軸方向に挟むように静止支持され、軸方向に投影した範囲内に前記複数のブラシホルダーを投影した範囲を含むように形成された絶縁材からなる複数の相間短絡防止板と、を有する静止側伝送部と、
を備え、
前記複数の相間短絡防止板のそれぞれには、前記ブラシホルダーと軸方向に対向しない複数の通風孔と、前記ブラシホルダーと軸方向に対向する通風孔と、が形成され、
前記ブラシホルダーと軸方向に対向しない前記複数の通風孔のうちの一部は、前記ブラシにおいて前記ブラシホルダーから前記ロータシャフトの径方向外側に突出した部分と軸方向に対向し、
前記複数のブラシホルダーおよび前記複数の相間短絡防止板は、前記回転子から離間した、
ことを特徴とする巻線形回転電機。 a rotor shaft, a rotor core attached to the radially outer side of the rotor shaft, a plurality of rotor windings passing through the rotor core, and the plurality of rotor windings attached to the rotor shaft. a rotor having a plurality of slip rings each electrically coupled;
a stator having a stator core provided radially outside the rotor core and a stator winding penetrating the stator core;
A plurality of brush holders that hold brushes that slide with each of the plurality of slip rings and are coupled to an external cable; a plurality of inter-phase short-circuit prevention plates made of an insulating material formed so as to include a projected range of the plurality of brush holders therein;
with
Each of the plurality of interphase short circuit prevention plates is formed with a plurality of ventilation holes not facing the brush holder in the axial direction and a ventilation hole facing the brush holder in the axial direction ,
a portion of the plurality of ventilation holes that do not axially face the brush holder axially faces a portion of the brush protruding radially outwardly of the rotor shaft from the brush holder;
The plurality of brush holders and the plurality of interphase short circuit prevention plates are separated from the rotor,
A wound rotating electrical machine characterized by: 前記複数のブラシホルダー、および前記複数の相間短絡防止板を収納する回転接続部カバーと、
前記回転接続部カバー内で、前記ロータシャフトに取り付けられた冷却ファンと、
をさらに備えることを特徴とする請求項１に記載の巻線形回転電機。 a rotary connection cover that houses the plurality of brush holders and the plurality of interphase short-circuit prevention plates;
a cooling fan mounted on the rotor shaft within the rotary joint cover;
2. The wound rotating electrical machine according to claim 1, further comprising: 前記複数のブラシホルダーを軸方向に貫通し、前記複数のブラシホルダーを静止支持し、周方向に互いに間隔をおいて配された複数の連結支持ロッドをさらに備え、
前記複数の相間短絡防止板のそれぞれは、２本の前記連結支持ロッドにより支持されていることを特徴とする請求項１または請求項２に記載の巻線形回転電機。
further comprising a plurality of connecting support rods axially penetrating the plurality of brush holders, stationary supporting the plurality of brush holders, and circumferentially spaced apart from each other;
3. The wound rotating electrical machine according to claim 1, wherein each of said plurality of inter-phase short-circuit prevention plates is supported by two of said connecting support rods.
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