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JP5893462B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JP5893462B2
JP5893462B2 JP2012069327A JP2012069327A JP5893462B2 JP 5893462 B2 JP5893462 B2 JP 5893462B2 JP 2012069327 A JP2012069327 A JP 2012069327A JP 2012069327 A JP2012069327 A JP 2012069327A JP 5893462 B2 JP5893462 B2 JP 5893462B2
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Japan
Prior art keywords
axial direction
pedestal
rotor
groove
permanent magnet
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JP2012069327A
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Japanese (ja)
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JP2013201853A (en
Inventor
慶亮 津房
慶亮 津房
英伸 槌本
英伸 槌本
雄一 坪井
雄一 坪井
将也 石川
将也 石川
貴陽 藤川
貴陽 藤川
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Toshiba Mitsubishi Electric Industrial Systems Corp
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Toshiba Mitsubishi Electric Industrial Systems Corp
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Application filed by Toshiba Mitsubishi Electric Industrial Systems Corp filed Critical Toshiba Mitsubishi Electric Industrial Systems Corp
Priority to JP2012069327A priority Critical patent/JP5893462B2/en
Priority to KR1020147028493A priority patent/KR20140143790A/en
Priority to CN201380014853.4A priority patent/CN104205573B/en
Priority to KR1020167016532A priority patent/KR20160079898A/en
Priority to PCT/JP2013/001994 priority patent/WO2013145684A1/en
Publication of JP2013201853A publication Critical patent/JP2013201853A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H02K1/2781—Magnets shaped to vary the mechanical air gap between the magnets and the stator
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Description

本発明は、永久磁石が取り付けられた回転子を有する回転電機に関する。   The present invention relates to a rotating electrical machine having a rotor to which a permanent magnet is attached.

回転電機は、回転子と、この回転子を半径方向外側から取り囲む固定子と、この固定子を収容する固定子枠と、を有する。   The rotating electrical machine includes a rotor, a stator that surrounds the rotor from the outside in the radial direction, and a stator frame that accommodates the stator.

回転子は、所定の軸（回転中心軸）の周りを回転する。回転子には、例えば永久磁石が取り付けられたものがある。このような回転子は、円環状の部材の外周に台座が固定されて、この台座に永久磁石が固定されるものがある。回転子や固定子には、これらを冷却するための通風路が形成されるものがある（例えば、特許文献１）。   The rotor rotates around a predetermined axis (rotation center axis). Some rotors have permanent magnets attached, for example. Some of such rotors have a base fixed to the outer periphery of an annular member, and a permanent magnet fixed to the base. Some rotors and stators are provided with ventilation paths for cooling them (for example, Patent Document 1).

固定子は、固定子鉄心および固定子巻線等を有する。固定子鉄心には、固定子鉄心を冷却するための通風路が形成されるものがある。この通風路に冷却用の空気が流れることによって、固定子鉄心が冷却される。この通風路には、回転中心軸が延びる方向の一方向に空気が流れる。   The stator has a stator core and a stator winding. Some of the stator cores are provided with ventilation paths for cooling the stator core. The cooling iron flows through this ventilation path, whereby the stator core is cooled. In this ventilation path, air flows in one direction in which the rotation center axis extends.

特開２０１１−１４２７３５号公報JP 2011-142735 A

永久磁石型回転電機の回転子の冷却は、回転子および固定子の間の空隙や、永久磁石同士の周方向間隙等を空気が流れることにより行われる。   The rotor of the permanent magnet type rotating electrical machine is cooled by air flowing through the gap between the rotor and the stator, the circumferential gap between the permanent magnets, and the like.

軸長が長くなるタイプでは、風下側の永久磁石は風上側よりも温度が上昇し、風下側の磁石を冷却することが困難になることが多い。   In the type having a long axial length, the temperature of the leeward permanent magnet is higher than that of the leeward side, and it is often difficult to cool the leeward side magnet.

本発明は上述した課題を解決するためになされたものであり、その目的は、回転子を効率よく冷却することである。   The present invention has been made to solve the above-described problems, and an object of the present invention is to efficiently cool the rotor.

上記目的を達成するための本発明に係る回転電機は、所定の軸周りを回転する回転軸と、前記回転軸を半径方向外側から取り囲み前記回転軸に固定されて前記回転軸と共に回転する回転子と、前記回転子を半径方向外側から取り囲む固定子と、前記固定子の固定子鉄心を半径方向外側から取り囲むように構成された固定子枠と、を有する回転電機において、前記回転子は、前記軸を半径方向外側から取り囲むように配置された円環状で、前記軸の周りを同軸に回転可能な円環部材と、それぞれが軸方向に延びて、互いに周方向間隙を形成するように前記円環部材の半径方向外側の外周面に固定された複数の台座と、前記各台座の半径方向外側にそれぞれ固定された複数の永久磁石と、を有し、前記各台座の半径方向外側面および前記各永久磁石の前記台座に接する半径方向内側面のうち少なくとも一方に、軸方向に延びて半径方向および軸方向に開口する溝が形成されていて、前記溝の軸方向の一方の側から反対側に送風可能なファン装置が設けられて、前記各永久磁石の前記台座に接する半径方向内側面に形成された前記溝のうち、前記ファン装置による送風の方向の中央より下流側のみに、半径方向に貫通する貫通穴が形成されていること、を特徴とする。 To achieve the above object, a rotating electrical machine according to the present invention includes a rotating shaft that rotates around a predetermined axis, and a rotor that surrounds the rotating shaft from the outside in the radial direction and is fixed to the rotating shaft and rotates together with the rotating shaft. If, in a rotating electric machine having a stator surrounding the rotor from the radially outward, and a stator frame that is configured to surround the stator core of the stator from radially outside, the rotor, the An annular member arranged so as to surround the shaft from the outside in the radial direction, and can be rotated coaxially around the shaft, and each of the annular members extends in the axial direction to form a circumferential gap. A plurality of pedestals fixed to a radially outer peripheral surface of the ring member, and a plurality of permanent magnets respectively fixed to the radially outer side of each pedestal, the radially outer surface of each pedestal and the Each permanent magnet Of at least one of the radially inner surface in contact with the base, have a groove which is open radially and axially extends in the axial direction is formed, it can blow on the opposite side from the one side of the axial direction of the groove Among the grooves formed on the radially inner side surface that is in contact with the pedestal of each permanent magnet, only a downstream side from the center in the direction of air blowing by the fan device is provided in a radial direction. Rukoto have through holes are formed, characterized by.

本発明によれば、回転子を効率よく冷却することが可能になる。   According to the present invention, the rotor can be efficiently cooled.

本発明に係る第１の実施形態の回転電機を模式的に示した概略正面図である。1 is a schematic front view schematically showing a rotary electric machine according to a first embodiment of the present invention. 図１の回転子の一部を軸方向外側から見た部分斜視図である。It is the fragmentary perspective view which looked at a part of rotor of FIG. 1 from the axial direction outer side. 図２の回転子の一部を軸方向外側から見た部分側面図である。FIG. 3 is a partial side view of a part of the rotor of FIG. 2 viewed from the outside in the axial direction. 本発明に係る第２の実施形態の回転電機の回転子の一部を軸方向外側から見た部分側面図である。It is the partial side view which looked at a part of rotor of the rotary electric machine of 2nd Embodiment which concerns on this invention from the axial direction outer side. 本発明に係る第３の実施形態の回転電機の回転子の一部を軸方向外側から見た部分側面図である。It is the partial side view which looked at a part of rotor of the rotary electric machine of 3rd Embodiment which concerns on this invention from the axial direction outer side. 本発明に係る第４の実施形態の回転電機の回転子の一部を軸方向外側から見た部分側面図である。It is the partial side view which looked at a part of rotor of the rotary electric machine of 4th Embodiment which concerns on this invention from the axial direction outer side. 本発明に係る第５の実施形態の回転電機の回転子の一部を軸方向外側から見た部分側面図である。It is the partial side view which looked at a part of rotor of the rotary electric machine of 5th Embodiment which concerns on this invention from the axial direction outer side. 本発明に係る第６の実施形態の回転電機の回転子の一組の永久磁石および台座の概略正面図である。It is a schematic front view of a set of permanent magnets and a pedestal of a rotor of a rotating electric machine according to a sixth embodiment of the present invention.

以下、本発明に係る回転電機の実施形態について図面を参照して説明する。   Embodiments of a rotating electrical machine according to the present invention will be described below with reference to the drawings.

［第１の実施形態］
第１の実施形態について、図１〜図３を用いて説明する。図１は、本実施形態の回転電機を模式的に示した概略正面図である。なお、図１では、最上部と最下部の放熱フィン４５のみが示され、他の放熱フィン４５の図示は省略している。 [First Embodiment]
A first embodiment will be described with reference to FIGS. FIG. 1 is a schematic front view schematically showing the rotating electrical machine of the present embodiment. In FIG. 1, only the uppermost and lowermost radiating fins 45 are shown, and the other radiating fins 45 are not shown.

図２は、図１の回転子２０の一部を軸方向外側から見た部分斜視図である。図３は、図２の回転子２０の一部を軸方向外側から見た部分側面図である。図３では、１組の台座２３および永久磁石２５を示している。   FIG. 2 is a partial perspective view of a part of the rotor 20 of FIG. 1 viewed from the outside in the axial direction. FIG. 3 is a partial side view of a part of the rotor 20 of FIG. 2 as viewed from the outside in the axial direction. In FIG. 3, one set of the base 23 and the permanent magnet 25 are shown.

先ず、本実施形態の回転電機の構成について説明する。   First, the configuration of the rotating electrical machine of the present embodiment will be described.

本実施形態の回転電機は、永久磁石式の同期発電機で、回転軸１０と、回転子２０と、固定子３０と、固定子枠４０と、放熱フィン４５と、内部ファン３８と、を有する。この同期発電機は、例えば風力により回転軸１０が回転し、その回転させる力を電力として取り出すことができるものである。   The rotating electrical machine of the present embodiment is a permanent magnet type synchronous generator, and includes a rotating shaft 10, a rotor 20, a stator 30, a stator frame 40, radiating fins 45, and an internal fan 38. . In this synchronous generator, for example, the rotating shaft 10 is rotated by wind power, and the rotating force can be taken out as electric power.

回転軸１０は、水平に延びて軸方向断面が円形の部材で、図示しない軸受で回転可能に支持されて、水平な回転中心軸の周りを回転する。   The rotary shaft 10 is a member that extends horizontally and has a circular axial cross section, is rotatably supported by a bearing (not shown), and rotates around a horizontal rotation center axis.

回転子２０は、全体で円環状をなし、回転軸１０を取り囲む部材で、円環部材２１と、複数の支持部材２２と、複数の台座２３と、複数の永久磁石２５と、を有する。   The rotor 20 has a ring shape as a whole and surrounds the rotary shaft 10, and includes an annular member 21, a plurality of support members 22, a plurality of pedestals 23, and a plurality of permanent magnets 25.

支持部材２２は、回転軸１０の三箇所の軸方向位置それぞれに複数本ずつ固定されて、回転軸１０と共に回転可能である。各軸方向位置に固定される支持部材２２は、それぞれの軸方向位置から放射状に円環部材２１の内周面まで延びて、円環部材２１を支持する。   A plurality of support members 22 are fixed to each of the three axial positions of the rotating shaft 10, and can be rotated together with the rotating shaft 10. The support members 22 fixed at the respective axial positions extend radially from the respective axial positions to the inner peripheral surface of the annular member 21 to support the annular member 21.

円環部材２１は、支持部材２２に支持されて回転自在で、回転軸１０を半径方向外側から取り囲む円環状の部材である。   The annular member 21 is an annular member that is supported by the support member 22 and is rotatable, and surrounds the rotary shaft 10 from the outside in the radial direction.

各台座２３は、軸方向に長い長方形が形成される板状の部材で、半径方向外側に座面２３ａが形成されている。この座面２３ａには永久磁石２５が接着により取り付けられる。   Each pedestal 23 is a plate-like member in which a long rectangle is formed in the axial direction, and a seating surface 23a is formed on the outer side in the radial direction. A permanent magnet 25 is attached to the seat surface 23a by adhesion.

各台座２３は、円環部材２１の外周面に周方向に複数配列されている。これらの台座２３は、互いに周方向間隙２９を形成するように配列される。   A plurality of pedestals 23 are arranged in the circumferential direction on the outer peripheral surface of the annular member 21. These pedestals 23 are arranged so as to form a circumferential gap 29 with respect to each other.

各台座２３の座面２３ａには、軸方向に延びる第１溝２４が形成されている。この第１溝２４は、半径方向外側に開口し、一方の軸方向端部から反対側の軸方向端部まで延びる。この第１溝２４の軸方向に垂直な断面は、略半円である。   A first groove 24 extending in the axial direction is formed in the seating surface 23 a of each pedestal 23. The first groove 24 opens radially outward and extends from one axial end to the opposite axial end. A cross section perpendicular to the axial direction of the first groove 24 is a substantially semicircle.

永久磁石２５は、軸方向の延びる略直方体状の部材で、各座面２３ａに接着により取り付けられる。各永久磁石２５の半径方向内側面、すなわち座面２３ａとの接着面２５ａには、第２溝２６が形成される。   The permanent magnet 25 is a substantially rectangular parallelepiped member extending in the axial direction, and is attached to each seating surface 23a by adhesion. A second groove 26 is formed on the inner surface in the radial direction of each permanent magnet 25, that is, on the adhesive surface 25a with the seat surface 23a.

この第２溝２６は、軸方向に延びて、半径方向外側に開口し、一方の軸方向端部から反対側の軸方向端部まで延びる。この第２溝２６の軸方向に垂直な断面は、略半円である。   The second groove 26 extends in the axial direction, opens radially outward, and extends from one axial end to the opposite axial end. A cross section perpendicular to the axial direction of the second groove 26 is a substantially semicircle.

座面２３ａに永久磁石２５が接着されているときに、第１溝２４および第２溝２６は互いに対向するように形成される。このとき、第１溝２４および第２溝２６で軸方向に貫通する軸方向貫通穴２８を形成する。この軸方向貫通穴２８は、軸方向に垂直な断面は略円形である。   When the permanent magnet 25 is bonded to the seating surface 23a, the first groove 24 and the second groove 26 are formed to face each other. At this time, an axial through hole 28 that penetrates in the axial direction is formed by the first groove 24 and the second groove 26. The axial through hole 28 has a substantially circular cross section perpendicular to the axial direction.

固定子３０は、回転子２０の半径方向外側に所定の半径方向間隔（空隙３２）をあけて半径方向外側から取り囲む円環状の部材である。詳細な図示は省略するが、軸方向に貫通し、冷却用の空気が流通可能な通風孔（図示せず）が形成される。   The stator 30 is an annular member that surrounds the rotor 20 from the outside in the radial direction with a predetermined radial interval (gap 32) on the outside in the radial direction. Although detailed illustration is omitted, a ventilation hole (not shown) that penetrates in the axial direction and through which cooling air can flow is formed.

固定子枠４０は、固定子３０を半径方向外側から取り囲むように構成される。固定子枠４０の内周は、固定子３０の外周に接している。   The stator frame 40 is configured to surround the stator 30 from the outside in the radial direction. The inner periphery of the stator frame 40 is in contact with the outer periphery of the stator 30.

固定子枠４０の外周面には、軸方向に長い放熱フィン４５が複数取り付けられている。これらの放熱フィン４５は、周方向に互いに間隔をあけて取り付けられている。   A plurality of heat radiation fins 45 that are long in the axial direction are attached to the outer peripheral surface of the stator frame 40. These radiating fins 45 are attached to each other in the circumferential direction at intervals.

この固定子枠４０は、詳細な図示は省略しているが、軸受を固定している。また、外気を取り込むための吸気口（図示せず）および固定子枠４０内を循環した空気が排気される排気口（図示せず）が形成されている。   Although not shown in detail, the stator frame 40 fixes a bearing. Further, an intake port (not shown) for taking in outside air and an exhaust port (not shown) through which the air circulated in the stator frame 40 is exhausted are formed.

内部ファン３８は、回転軸１０に取り付けられて、回転軸１０の回転と共に回転して送風する。この送風により、固定子３０および回転子２０等を冷却する。この例では、図１における右側が上流側で、左側が下流側となる。冷却のための空気の流れについては後で説明する。   The internal fan 38 is attached to the rotary shaft 10 and rotates with the rotation of the rotary shaft 10 to blow air. The stator 30 and the rotor 20 are cooled by this air blowing. In this example, the right side in FIG. 1 is the upstream side, and the left side is the downstream side. The air flow for cooling will be described later.

続いて、本実施形態の作用について説明する。   Then, the effect | action of this embodiment is demonstrated.

固定子枠４０の吸気口から吸気された空気は、空隙３２、固定子に設けられた通風孔、回転子２０の永久磁石２５同士の周方向間隙２９、および回転子２０に形成された軸方向貫通穴２８に流れ込む。回転子２０は、空隙３２、回転子２０の永久磁石２５同士の周方向間隙２９、および回転子２０に形成された軸方向貫通穴２８を流れる空気により冷却される。   The air sucked from the intake port of the stator frame 40 is a gap 32, a ventilation hole provided in the stator, a circumferential gap 29 between the permanent magnets 25 of the rotor 20, and an axial direction formed in the rotor 20. It flows into the through hole 28. The rotor 20 is cooled by the air flowing through the air gap 32, the circumferential gap 29 between the permanent magnets 25 of the rotor 20, and the axial through hole 28 formed in the rotor 20.

軸長が比較的長いタイプの同期発電機では、下流側は上流側に比べて永久磁石２５の温度が高くなる。軸方向貫通穴２８を設けない場合には、永久磁石２５の半径方向外側および周方向面に流れることとなる。   In a synchronous generator with a relatively long shaft length, the temperature of the permanent magnet 25 is higher on the downstream side than on the upstream side. When the axial through hole 28 is not provided, the permanent magnet 25 flows on the radially outer side and the circumferential surface.

これに対して、上述したように軸方向貫通穴２８を形成することで、永久磁石２５の半径方向外側および周方向面に加えて、軸方向貫通穴２８にも冷却空気が流れるため、半径方向内側の面に冷却空気が吹き付けられることとなる。これにより、永久磁石２５の冷却効果が向上する。また、軸方向貫通穴２８を流れる冷却空気は、台座２３の冷却にも寄与することができる。また、風下側の永久磁石２５の温度上昇が抑えられるため、軸方向の磁束密度の偏りが改善される。   On the other hand, since the axial through hole 28 is formed as described above, the cooling air flows in the axial through hole 28 in addition to the radially outer side and the circumferential surface of the permanent magnet 25. Cooling air is blown onto the inner surface. Thereby, the cooling effect of the permanent magnet 25 improves. Further, the cooling air flowing through the axial through hole 28 can also contribute to the cooling of the pedestal 23. Moreover, since the temperature rise of the permanent magnet 25 on the leeward side is suppressed, the deviation of the magnetic flux density in the axial direction is improved.

以上の説明からわかるように本実施形態によれば、回転子２０を効率よく冷却することが可能になる。   As can be seen from the above description, according to this embodiment, the rotor 20 can be efficiently cooled.

［第２の実施形態］
第２の実施形態について図４を用いて説明する。図４は、本実施形態の回転電機の回転子２０の一部を軸方向外側から見た部分側面図である。なお、本実施形態は、第１の実施形態（図１〜図３）の変形例であって、第１の実施形態と同一部分または類似部分には、同一符号を付して、重複説明を省略する。また、本実施形態の回転電機の全体の構成は、第１の実施形態で説明した図１と同様である。 [Second Embodiment]
A second embodiment will be described with reference to FIG. FIG. 4 is a partial side view of a part of the rotor 20 of the rotating electrical machine of the present embodiment as viewed from the outside in the axial direction. In addition, this embodiment is a modification of 1st Embodiment (FIGS. 1-3), Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is carried out. Omitted. Further, the overall configuration of the rotating electrical machine of the present embodiment is the same as that of FIG. 1 described in the first embodiment.

本実施形態の軸方向貫通穴２８は、軸方向に垂直な断面が周方向に長いレーストラック状に形成される。これにより、第１の実施形態に比べて、軸方向貫通穴２８の軸方向に垂直な断面積が大きくなるため、永久磁石２５の半径方向内側の面に冷却空気が吹き付けられる面積が大きくなる。これにより、永久磁石２５の冷却効果が大きくなる。   The axial through hole 28 of the present embodiment is formed in a racetrack shape in which a cross section perpendicular to the axial direction is long in the circumferential direction. Thereby, compared to the first embodiment, the cross-sectional area perpendicular to the axial direction of the axial through hole 28 is increased, so that the area where the cooling air is blown onto the radially inner surface of the permanent magnet 25 is increased. Thereby, the cooling effect of the permanent magnet 25 becomes large.

［第３の実施形態］
第３の実施形態について図５を用いて説明する。図５は、本実施形態の回転電機の回転子２０の一部を軸方向外側から見た部分側面図である。なお、本実施形態は、第１の実施形態（図１〜図３）の変形例であって、第１の実施形態と同一部分または類似部分には、同一符号を付して、重複説明を省略する。また、本実施形態の回転電機の全体の構成は、第１の実施形態で説明した図１と同様である。 [Third Embodiment]
A third embodiment will be described with reference to FIG. FIG. 5 is a partial side view of a part of the rotor 20 of the rotating electrical machine of the present embodiment as viewed from the outside in the axial direction. In addition, this embodiment is a modification of 1st Embodiment (FIGS. 1-3), Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is carried out. Omitted. Further, the overall configuration of the rotating electrical machine of the present embodiment is the same as that of FIG. 1 described in the first embodiment.

本実施形態の軸方向貫通穴２８は、第１の実施形態で説明した軸方向貫通穴２８が周方向に二つ並ぶように形成されている。軸方向貫通穴２８同士は、互いに平行になるように形成される。   The axial through hole 28 of the present embodiment is formed such that two axial through holes 28 described in the first embodiment are arranged in the circumferential direction. The axial through holes 28 are formed so as to be parallel to each other.

これにより、第１の実施形態に比べて、軸方向貫通穴２８の軸方向に垂直な断面積が大きくなるため、永久磁石２５の半径方向内側の面に冷却空気が吹き付けられる面積が大きくなる。これにより、永久磁石２５の冷却効果が大きくなる。   Thereby, compared to the first embodiment, the cross-sectional area perpendicular to the axial direction of the axial through hole 28 is increased, so that the area where the cooling air is blown onto the radially inner surface of the permanent magnet 25 is increased. Thereby, the cooling effect of the permanent magnet 25 becomes large.

［第４の実施形態］
第４の実施形態について図６を用いて説明する。図６は、本実施形態の回転電機の回転子２０の一部を軸方向外側から見た部分側面図である。なお、本実施形態は、第１の実施形態（図１〜図３）の変形例であって、第１の実施形態と同一部分または類似部分には、同一符号を付して、重複説明を省略する。また、本実施形態の回転電機の全体の構成は、第１の実施形態で説明した図１と同様である。 [Fourth Embodiment]
A fourth embodiment will be described with reference to FIG. FIG. 6 is a partial side view of a part of the rotor 20 of the rotating electrical machine of the present embodiment as viewed from the outside in the axial direction. In addition, this embodiment is a modification of 1st Embodiment (FIGS. 1-3), Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is carried out. Omitted. Further, the overall configuration of the rotating electrical machine of the present embodiment is the same as that of FIG. 1 described in the first embodiment.

本実施形態の第１溝２４の軸方向に垂直な断面は、一つの頂点が溝底になるような三角形である。第２溝２６の軸方向に垂直な断面も、第１溝２４と同様に、三角形である。第１溝２４および第２溝２６からなる軸方向貫通穴２８の軸方向に垂直な断面は、略正方形となる。このとき、各溝底の断面形状が、それぞれ部分円弧になるように形成してもよい。   The cross section perpendicular to the axial direction of the first groove 24 of the present embodiment is a triangle such that one vertex is the groove bottom. Similarly to the first groove 24, the cross section perpendicular to the axial direction of the second groove 26 is also a triangle. A cross section perpendicular to the axial direction of the axial through hole 28 including the first groove 24 and the second groove 26 is substantially square. At this time, you may form so that the cross-sectional shape of each groove bottom may become a partial arc, respectively.

これにより、第１の実施形態と同様の効果を得ることができる。また、この場合、第１溝２４および第２溝２６の断面形状を三角形にすることで、三角形の辺に相当する部分が軸方向に広がることで溝に平面が形成されることとなる。断面を円形とするよりも溝加工をしやすくなる。   Thereby, the effect similar to 1st Embodiment can be acquired. Further, in this case, by making the cross-sectional shapes of the first groove 24 and the second groove 26 triangular, a portion corresponding to the side of the triangle spreads in the axial direction, so that a flat surface is formed in the groove. Grooving is easier than the circular cross section.

［第５の実施形態］
第５の実施形態について図７を用いて説明する。図７は、本実施形態の回転電機の回転子２０の一部を軸方向外側から見た部分側面図である。なお、本実施形態は、第１の実施形態（図１〜図３）の変形例であって、第１の実施形態と同一部分または類似部分には、同一符号を付して、重複説明を省略する。また、本実施形態の回転電機の全体の構成は、第１の実施形態で説明した図１と同様である。 [Fifth Embodiment]
A fifth embodiment will be described with reference to FIG. FIG. 7 is a partial side view of a part of the rotor 20 of the rotating electrical machine of the present embodiment as viewed from the outside in the axial direction. In addition, this embodiment is a modification of 1st Embodiment (FIGS. 1-3), Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is carried out. Omitted. Further, the overall configuration of the rotating electrical machine of the present embodiment is the same as that of FIG. 1 described in the first embodiment.

本実施形態の軸方向貫通穴２８は、第１の実施形態で説明した第１溝２４のみで形成されている。永久磁石２５に溝加工をしないため、第１の実施形態に比べて、製作コストを低減できる。   The axial through hole 28 of the present embodiment is formed by only the first groove 24 described in the first embodiment. Since the permanent magnet 25 is not grooved, the manufacturing cost can be reduced as compared with the first embodiment.

なお、当該軸方向貫通穴２８は、第２溝２６のみで形成してもよい。   The axial through hole 28 may be formed only by the second groove 26.

［第６の実施形態］
第６の実施形態について図８を用いて説明する。図８は、本実施形態の回転電機の回転子２０の一組の永久磁石２５および台座２３等の概略部分正面図である。なお、本実施形態は、第１の実施形態（図１〜図３）の変形例であって、第１の実施形態と同一部分または類似部分には、同一符号を付して、重複説明を省略する。また、本実施形態の回転電機の全体の構成は、第１の実施形態で説明した図１と同様である。 [Sixth Embodiment]
A sixth embodiment will be described with reference to FIG. FIG. 8 is a schematic partial front view of a set of permanent magnets 25, a pedestal 23, and the like of the rotor 20 of the rotating electrical machine of the present embodiment. In addition, this embodiment is a modification of 1st Embodiment (FIGS. 1-3), Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is carried out. Omitted. Further, the overall configuration of the rotating electrical machine of the present embodiment is the same as that of FIG. 1 described in the first embodiment.

本実施形態の第２溝２６のうち、図８における左側には、半径方向に貫通する半径方向貫通穴２８ａが形成されている。この半径方向貫通穴２８ａの一方は第２溝２６の溝底に開口し、反対側は空隙３２に開口する。   A radial through hole 28a penetrating in the radial direction is formed on the left side in FIG. 8 of the second groove 26 of the present embodiment. One of the radial through holes 28 a opens at the groove bottom of the second groove 26, and the opposite side opens at the gap 32.

第１の実施形態で説明した内部ファン３８（図１）は、回転軸１０に取り付けられて、回転軸１０の回転と共に回転して送風する。この送風により、固定子３０および回転子２０等を冷却する。図１における右側が上流側で、左側が下流側となる。   The internal fan 38 (FIG. 1) described in the first embodiment is attached to the rotary shaft 10 and rotates with the rotation of the rotary shaft 10 to blow air. The stator 30 and the rotor 20 are cooled by this air blowing. The right side in FIG. 1 is the upstream side, and the left side is the downstream side.

本実施形態では、図８における右側が上流側で、左側が下流側となる。すなわち、半径方向貫通穴２８ａが形成される部位は、下流側となる。   In the present embodiment, the right side in FIG. 8 is the upstream side, and the left side is the downstream side. That is, the part where the radial through hole 28a is formed is on the downstream side.

内部ファン３８により送風されて軸方向貫通穴２８内を流れる空気の一部は、半径方向貫通穴２８ａに流れることができる。その結果、永久磁石２５の下流側では、永久磁石２５に接する空気の量が増えることとなり、永久磁石２５の冷却効果が増大する。   A portion of the air that is blown by the internal fan 38 and flows through the axial through hole 28 can flow into the radial through hole 28a. As a result, on the downstream side of the permanent magnet 25, the amount of air in contact with the permanent magnet 25 increases, and the cooling effect of the permanent magnet 25 increases.

［その他の実施形態］
上記実施形態の説明は、本発明を説明するための例示であって、特許請求の範囲に記載の発明を限定するものではない。また、本発明の各部構成は上記実施形態に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能である。 [Other Embodiments]
The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

上述した実施形態では、軸方向貫通穴２８の軸方向に垂直な断面を円形状およびレーストラック形状について説明したがこれに限らず、楕円等でもよい。   In the above-described embodiment, the cross section perpendicular to the axial direction of the axial through hole 28 has been described with respect to the circular shape and the racetrack shape, but the present invention is not limited thereto, and may be an ellipse or the like.

また、軸方向貫通穴２８は、１組の台座２３および永久磁石２５に３個以上形成してもよい。   Further, three or more axial through holes 28 may be formed in one set of base 23 and permanent magnet 25.

また、第１溝２４および第２溝２６が互いに対向するように形成されているがこれに限らず、周方向にずれていてもよい。   Moreover, although the 1st groove | channel 24 and the 2nd groove | channel 26 are formed so that it may mutually oppose, it may shift | deviate not only to this but the circumferential direction.

また、回転子２０の円環部材２１は、支持部材２２で支持されているが、これに限らない。円板等により支持されてもよく、円環内の空洞を形成しなくてもよい。   Moreover, although the annular member 21 of the rotor 20 is supported by the support member 22, it is not limited to this. It may be supported by a disk or the like, and it is not necessary to form a cavity in the ring.

また、上述した実施形態では、固定子の外周と固定子枠４０の内周が接しているが、これに限らない。所定の半径方向間隔をあけてもよい。   In the embodiment described above, the outer periphery of the stator and the inner periphery of the stator frame 40 are in contact with each other, but the present invention is not limited to this. A predetermined radial interval may be provided.

また、上記実施形態では、回転軸１０は、軸受に回転可能に支持されているが、これに限らない。例えば、軸部材を固定して、この軸部材に軸受を取り付けて、この軸受の外周に支持部材２２を固定してもよい。この場合、回転中心を通風路として用いることも可能になる。この場合の軸受は、軸部材に接する側が固定されて、半径方向外側（外周面）が回転するように構成されている。   Moreover, in the said embodiment, although the rotating shaft 10 is rotatably supported by the bearing, it is not restricted to this. For example, the shaft member may be fixed, a bearing may be attached to the shaft member, and the support member 22 may be fixed to the outer periphery of the bearing. In this case, the center of rotation can be used as a ventilation path. The bearing in this case is configured such that the side in contact with the shaft member is fixed and the radially outer side (outer peripheral surface) rotates.

また、第１の実施形態〜第６の実施形態それぞれの特徴を互いに組み合わせてもよい。例えば、第１溝２４の軸方向に垂直な断面を半円として、第２溝２６の当該断面を三角形としてもよい。   Further, the features of the first to sixth embodiments may be combined with each other. For example, the cross section perpendicular to the axial direction of the first groove 24 may be a semicircle, and the cross section of the second groove 26 may be a triangle.

１０…回転軸
２０…回転子
２１…円環部材
２２…支持部材
２３…台座
２３ａ…座面
２４…第１溝
２５…永久磁石
２５ａ…接着面
２６…第２溝
２８…軸方向貫通穴
２８ａ…半径方向貫通穴
２９…周方向間隙
３０…固定子
３２…空隙
３８…内部ファン
４０…固定子枠
４５…放熱フィン DESCRIPTION OF SYMBOLS 10 ... Rotating shaft 20 ... Rotor 21 ... Ring member 22 ... Supporting member 23 ... Base 23a ... Seat surface 24 ... 1st groove | channel 25 ... Permanent magnet 25a ... Adhesive surface 26 ... 2nd groove | channel 28 ... Axial through-hole 28a ... Radial direction through hole 29 ... Circumferential gap 30 ... Stator 32 ... Air gap 38 ... Internal fan 40 ... Stator frame 45 ... Radiating fin

Claims (5)

所定の軸周りを回転する回転軸と、
前記回転軸を半径方向外側から取り囲み前記回転軸に固定されて前記回転軸と共に回転する回転子と、
前記回転子を半径方向外側から取り囲む固定子と、
前記固定子の固定子鉄心を半径方向外側から取り囲むように構成された固定子枠と、
を有する回転電機において、
前記回転子は、
前記軸を半径方向外側から取り囲むように配置された円環状で、前記軸の周りを同軸に回転可能な円環部材と、
それぞれが軸方向に延びて、互いに周方向間隙を形成するように前記円環部材の半径方向外側の外周面に固定された複数の台座と、
前記各台座の半径方向外側にそれぞれ固定された複数の永久磁石と、
を有し、
前記各台座の半径方向外側面および前記各永久磁石の前記台座に接する半径方向内側面のうち少なくとも一方に、軸方向に延びて半径方向および軸方向に開口する溝が形成されていて、
前記溝の軸方向の一方の側から反対側に送風可能なファン装置が設けられて、
前記各永久磁石の前記台座に接する半径方向内側面に形成された前記溝のうち、前記ファン装置による送風の方向の中央より下流側のみに、半径方向に貫通する貫通穴が形成されていること、
を特徴とする回転電機。 A rotation axis that rotates around a predetermined axis;
A rotor that surrounds the rotating shaft from the outside in the radial direction and is fixed to the rotating shaft and rotates together with the rotating shaft;
A stator surrounding the rotor from outside in the radial direction;
A stator frame configured to surround the stator core of the stator from the radially outer side;
In a rotating electrical machine having
The rotor is
An annular member disposed so as to surround the shaft from the outside in the radial direction, and an annular member coaxially rotatable around the shaft;
A plurality of pedestals, each extending in the axial direction, fixed to the outer circumferential surface on the radially outer side of the annular member so as to form a circumferential gap with each other;
A plurality of permanent magnets respectively fixed to the outside in the radial direction of each pedestal;
Have
A groove extending in the axial direction and opening in the radial direction and the axial direction is formed on at least one of the radially outer side surface of each pedestal and the radially inner side surface in contact with the pedestal of each permanent magnet ,
A fan device capable of blowing air from one side in the axial direction of the groove to the opposite side is provided,
Of the grooves formed on the radially inner side surface of the permanent magnet that is in contact with the pedestal, a through hole penetrating in the radial direction is formed only on the downstream side of the center in the air blowing direction by the fan device. ,
Rotating electric machine. 前記溝が、前記各台座の半径方向外側面および前記各永久磁石の前記台座に接する半径方向内側面の両方に形成されているときに、
前記各台座の半径方向外側面に形成された前記溝と、前記各永久磁石の前記台座に接する半径方向内側面に形成された前記溝とが、互いに対向するように形成されていることを特徴とする請求項１に記載の回転電機。 When the groove is formed on both the radially outer surface of each pedestal and the radially inner surface contacting the pedestal of each permanent magnet,
The groove formed on the radially outer surface of each pedestal and the groove formed on the radially inner surface in contact with the pedestal of each permanent magnet are formed to face each other. The rotating electrical machine according to claim 1. 前記溝は、それぞれの軸方向に垂直な断面が略半円であること、を特徴とする請求項１または請求項２に記載の回転電機。   3. The rotating electrical machine according to claim 1, wherein each of the grooves has a substantially semicircular cross section perpendicular to each axial direction. 前記溝は、それぞれの軸方向に垂直な断面が略三角形であること、を特徴とする請求項１または請求項２に記載の回転電機。   3. The rotating electrical machine according to claim 1, wherein each of the grooves has a substantially triangular cross section perpendicular to each axial direction. 前記ファン装置は、前記回転軸に取り付けられて前記回転軸と共に回転するファンであること、を特徴とする請求項１ないし請求項４のいずれか一項に記載の回転電機。 5. The rotating electrical machine according to claim 1 , wherein the fan device is a fan that is attached to the rotating shaft and rotates together with the rotating shaft . 6.
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Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3208913A1 (en) * 2016-02-22 2017-08-23 Siemens Aktiengesellschaft Rotor of a permanently excited dynamoelectric rotating machine and its use
EP3402044A1 (en) * 2017-05-10 2018-11-14 GE Renewable Technologies Wind B.V. Magnet module and method of manufacturing same
US11843334B2 (en) 2017-07-13 2023-12-12 Denso Corporation Rotating electrical machine
CN113991959B (en) 2017-07-21 2024-04-16 株式会社电装 Rotary electric machine
JP2019024293A (en) 2017-07-21 2019-02-14 株式会社デンソー Rotary electric machine
CN111557069A (en) 2017-12-28 2020-08-18 株式会社电装 Rotating electrical machine
JP7006541B2 (en) 2017-12-28 2022-01-24 株式会社デンソー Rotating machine
JP6939750B2 (en) 2017-12-28 2021-09-22 株式会社デンソー Rotating machine
DE112018006651T5 (en) 2017-12-28 2020-10-08 Denso Corporation Wheel drive device
JP6922868B2 (en) 2017-12-28 2021-08-18 株式会社デンソー Rotating electrical system
JP6927186B2 (en) 2017-12-28 2021-08-25 株式会社デンソー Rotating machine
JP7056442B2 (en) * 2017-12-28 2022-04-19 株式会社デンソー Rotating electric machine
CN111512519B (en) 2017-12-28 2022-10-11 株式会社电装 Rotating electrical machine
DE112018006717T5 (en) 2017-12-28 2020-09-10 Denso Corporation Rotating electric machine
WO2019131905A1 (en) * 2017-12-28 2019-07-04 株式会社デンソー Rotating electrical machine
JP2019149859A (en) * 2018-02-26 2019-09-05 本田技研工業株式会社 Magnet cooling structure and rotary electric machine
EP3748817A1 (en) * 2019-06-06 2020-12-09 Siemens Gamesa Renewable Energy A/S Permanent magnet module for a permanent magnet machine
CN111049297B (en) * 2019-12-13 2021-06-04 珠海格力电器股份有限公司 Rotor and motor
US12062970B2 (en) * 2020-02-21 2024-08-13 Mitsubishi Electric Corporation Electric motor
DE112020006839T5 (en) 2020-03-05 2022-12-15 Denso Corporation Rotating electrical machines
JP7231112B2 (en) * 2020-03-25 2023-03-01 株式会社Ihi Rotor of rotary electric machine
JP7142072B2 (en) * 2020-11-02 2022-09-26 本田技研工業株式会社 Rotor of rotary electric machine
CN112821644A (en) * 2021-01-29 2021-05-18 上海电机学院 Water cooling system of disc type coreless permanent magnet motor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786854B1 (en) * 1994-10-14 1999-06-16 Honda Giken Kogyo Kabushiki Kaisha Rotor for rotating machine, method of manufacturing same, and magnet unit
JP3631808B2 (en) * 1995-06-20 2005-03-23 本田技研工業株式会社 Rotor for rotating machine, method for manufacturing the rotor, and magnet unit
JPH08205438A (en) * 1995-01-25 1996-08-09 Toshiba Ave Corp Motor
JPH09168246A (en) * 1995-12-13 1997-06-24 Fuji Electric Co Ltd Cooling device of permanent magnet synchronous machine
GB2438443A (en) * 2006-05-27 2007-11-28 Converteam Ltd Rotor magnet retaining arrangement suitable for low-speed large-diameter electrical generators
JP4867598B2 (en) * 2006-11-15 2012-02-01 トヨタ自動車株式会社 Manufacturing method of rotor
JP2011004518A (en) * 2009-06-18 2011-01-06 Fuji Electric Systems Co Ltd Rotary electric machine
JP5260563B2 (en) 2010-01-07 2013-08-14 株式会社日立製作所 Permanent magnet generator or motor
CN102983680A (en) * 2012-11-28 2013-03-20 沈阳工业大学 Air and water hybrid cooling high-speed permanent-magnet motor

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