JP2007244177A - Rotary electric machine - Google Patents

Rotary electric machine Download PDF

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Publication number
JP2007244177A
JP2007244177A JP2006067266A JP2006067266A JP2007244177A JP 2007244177 A JP2007244177 A JP 2007244177A JP 2006067266 A JP2006067266 A JP 2006067266A JP 2006067266 A JP2006067266 A JP 2006067266A JP 2007244177 A JP2007244177 A JP 2007244177A
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Japan
Prior art keywords
rotor
stator
machine
ventilation path
rotating electrical
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Pending
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JP2006067266A
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Japanese (ja)
Inventor
Tadashi Maeda
忠司 前田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2006067266A priority Critical patent/JP2007244177A/en
Publication of JP2007244177A publication Critical patent/JP2007244177A/en
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  • Motor Or Generator Cooling System (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine, in which inside air is circulated in the machine, without installing the inside fan of the rotary electric machine. <P>SOLUTION: A rotor 10, in which a rotor core 12 is engaged with a rotor shaft 11 and a rotor conductor 13 is inserted thereto, and a stator 20 with a stator coil 22 wound on a stator core 21 having the space in which the rotor 10 is arranged at a central part, are provided. The stator 20 is supported by a frame 23, and two or more spiral spaces are formed in the axial direction, between the rotor shaft 11 of the rotor 10 and the rotor core 12 so that a ventilation flue 14 between the stator 20 and a frame 23 is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、電動機または発電機等の固定子と回転子とからなる回転電機に関するものである。   The present invention relates to a rotating electrical machine including a stator such as an electric motor or a generator and a rotor.

電動機または発電機等の回転電機は、回転軸に回転子鉄心を嵌装して回転子導体を装着した回転子と、固定子鉄心に固定子コイルが巻回された固定子を備えた構成である。
このように構成された回転電機は、運転されると固定子や回転子の損失による温度上昇があるが、この温度上昇を抑えるために内部空気を循環させて外部に放熱する構造が一般的である。
回転電機の内部空気を機内ファンを設けないで循環させる構成としては、例えば特許文献1にブラシレスモータとして開示されている。
この構成は特許文献1の図2に示されているように、ロータにロータマグネットを備え、ロータマグネットの外径部に軸方向に延びる溝部を形成した構成である。
A rotating electrical machine such as an electric motor or a generator has a configuration in which a rotor core is fitted on a rotating shaft and a rotor conductor is mounted, and a stator in which a stator coil is wound around the stator core. is there.
When the rotating electrical machine configured in this way is operated, there is a temperature rise due to the loss of the stator and the rotor. In order to suppress this temperature rise, a structure that circulates internal air and radiates heat to the outside is common. is there.
As a configuration for circulating the internal air of a rotating electrical machine without providing an in-machine fan, for example, Patent Document 1 discloses a brushless motor.
In this configuration, as shown in FIG. 2 of Patent Document 1, the rotor is provided with a rotor magnet, and a groove portion extending in the axial direction is formed in the outer diameter portion of the rotor magnet.

この構成のロータマグネットは希土類材料で構成しており、希土類材料のマグネットは、フェライト系マグネットに比較して電気抵抗が小さいので、ロータに使用された場合にはうず電流損による発熱が大きくなる。この発熱を冷却する手段として、ロータマグネットの外径部に軸方向に延びる溝部を形成したものであり、溝部を形成したことにより、うず電流損が減少するとともに、冷却風が良好に発生してモータフレーム内に冷却風が流れ、冷却性能が向上すると記載されている。   The rotor magnet having this configuration is made of a rare earth material, and the magnet of the rare earth material has a smaller electric resistance than that of a ferrite magnet. Therefore, when used in a rotor, heat generation due to eddy current loss increases. As a means for cooling this heat generation, a groove portion extending in the axial direction is formed in the outer diameter portion of the rotor magnet. By forming the groove portion, the eddy current loss is reduced and the cooling air is generated satisfactorily. It is described that cooling air flows in the motor frame and the cooling performance is improved.

特開平09−093895号公報Japanese Patent Application Laid-Open No. 09-093895

上記特許文献1に開示された構成は、軸方向に延びる溝を設けたことにより、ロータが回転すると冷却風を良好に発生できて冷却性能の向上が図れると示されている。
しかし、ロータ外周部の軸方向に延びる溝部はロータ外周部に空気の乱流は発生するが、軸方向に空気圧を発生させることはできないので、モータのフレーム内に空気を循環させることはできないという問題点があった。
The configuration disclosed in the above-mentioned Patent Document 1 shows that by providing a groove extending in the axial direction, when the rotor rotates, cooling air can be generated satisfactorily and cooling performance can be improved.
However, the groove extending in the axial direction of the outer periphery of the rotor generates turbulent air flow in the outer periphery of the rotor, but cannot generate air pressure in the axial direction, so that air cannot be circulated in the frame of the motor. There was a problem.

この発明は、上記問題点を解決するためになされたものであり、回転電機の機内ファンを設けることなく機内空気が機内を循環する回転電機を構成することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to constitute a rotating electrical machine in which in-machine air circulates in the machine without providing an in-machine fan of the rotating electrical machine.

この発明に係る回転電機は、回転軸の外側に螺旋状通風路を形成した回転子と、この回転子を囲む固定子と、固定子の外周部を囲って固定子外周部に通風路を形成し、固定子両側を支持するフレームとを備えたものである。   The rotating electrical machine according to the present invention includes a rotor in which a spiral ventilation path is formed on the outer side of the rotating shaft, a stator that surrounds the rotor, and a ventilation path that surrounds the outer periphery of the stator and that is formed in the outer periphery of the stator. And a frame that supports both sides of the stator.

この発明に係る回転電機は、固定子をフレームにより支持し、回転子の回転軸の外周部に螺旋状通風路を形成し、固定子と固定子の外周部を囲うフレームとの間に通風路を形成したことにより、機内ファンを設けることなく、機内空気が循環する構成となり、回転電機内部の発熱が回転電機の外周表面から効果的に放熱され、温度上昇が抑制される構成となる。また、機内ファンを設けないことは、軸方向の長さが短くなり、回転電機として軽量化を図ることができる。   In the rotating electrical machine according to the present invention, the stator is supported by the frame, a spiral ventilation path is formed on the outer peripheral portion of the rotating shaft of the rotor, and the ventilation path is formed between the stator and the frame surrounding the outer peripheral portion of the stator. As a result, the air inside the machine circulates without providing an in-machine fan, and the heat generated inside the rotating electrical machine is effectively radiated from the outer peripheral surface of the rotating electrical machine, thereby suppressing the temperature rise. In addition, the absence of the in-machine fan shortens the axial length, thereby reducing the weight of the rotating electrical machine.

実施の形態1.
図1はこの発明に係る実施の形態1の回転電機の中心軸から上部のみを示した断面図であり、図2は図1の回転子の詳細図である。
この構成の回転子10は、図2の詳細図に示すように、回転軸11と、回転軸11の外周に複数の螺旋状通風路14を設け、その螺旋状通風路14の外周に回転子鉄心12を嵌挿し、回転子鉄心12には回転子導体13を挿入している。
固定子20は、中心部に回転子10が配置される空間を有し、固定子コイル22が巻装されるスロットを有する固定子鉄心21と、固定子鉄心21に巻装された固定子コイル22とで構成し、固定子20はフレーム23により支持し、フレーム23の内周と固定子鉄心21の外周部に通風路24を設けている。
回転子10の外径と固定子20の内径との間には空隙15が形成されている。
固定子20の両端部には、一対のブラケット25、26を配置し、フレーム23の両端部を閉塞し、ブラケット25、26のそれぞれの中心部には回転軸11を回転自在に支持する軸受27a、27bを設けている。
Embodiment 1 FIG.
FIG. 1 is a sectional view showing only the upper part from the central axis of the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 2 is a detailed view of the rotor of FIG.
As shown in the detailed view of FIG. 2, the rotor 10 having this configuration is provided with a rotation shaft 11 and a plurality of spiral ventilation passages 14 on the outer periphery of the rotation shaft 11, and the rotor on the outer periphery of the spiral ventilation passage 14. An iron core 12 is fitted and a rotor conductor 13 is inserted into the rotor iron core 12.
The stator 20 has a space in which the rotor 10 is disposed at the center, a stator core 21 having a slot around which the stator coil 22 is wound, and a stator coil wound around the stator core 21. 22, the stator 20 is supported by a frame 23, and an air passage 24 is provided on the inner periphery of the frame 23 and the outer periphery of the stator core 21.
A gap 15 is formed between the outer diameter of the rotor 10 and the inner diameter of the stator 20.
A pair of brackets 25 and 26 are disposed at both ends of the stator 20, both ends of the frame 23 are closed, and a bearing 27 a that rotatably supports the rotating shaft 11 at the center of each of the brackets 25 and 26. 27b.

このように構成された回転電機が運転されると、回転子10が回転することにより、機内空気は回転子10の軸方向に螺旋状に延在する螺旋状通風路14の一方から流入して他方に排出し、固定子コイル22の端部周囲を通過して通風路24を通り、固定子コイル22の他方の端部周囲を通過して螺旋状通風路14に流入する経路で機内を循環する。
機内空気が機内を循環することにより、機内の各部の温度は平均化し、機内の発熱はフレーム23、ブラケット25の外周表面から効率よく放熱されて回転電機の温度上昇が抑制される。また、機内ファンを設けないことは、軸方向の長さが短くなり、回転電機として軽量化を図ることができる。
When the rotating electrical machine configured as described above is operated, the rotor 10 rotates, so that the in-machine air flows from one of the spiral ventilation paths 14 that spirally extend in the axial direction of the rotor 10. The air is discharged to the other side, passes through the periphery of the end of the stator coil 22, passes through the ventilation path 24, circulates in the machine through the path of the other end of the stator coil 22 and flows into the spiral ventilation path 14. To do.
As the air in the machine circulates in the machine, the temperature of each part in the machine is averaged, and the heat generated in the machine is efficiently radiated from the outer peripheral surfaces of the frame 23 and the bracket 25 to suppress the temperature rise of the rotating electrical machine. In addition, the absence of the in-machine fan shortens the axial length, thereby reducing the weight of the rotating electrical machine.

実施の形態2.
実施の形態1の回転子10に設けられた螺旋状通風路14は、回転子10が回転すると螺旋状通風路14から機内の空気が螺旋状通風路14に流入するが、回転条件により螺旋状通風路14の入口部分で笛吹現象による騒音が発生する可能性がある。この実施の形態2は、螺旋状通風路14の入口における笛吹現象を防止する案内羽根16を設けた構成である。図3に実施の形態2の回転子10の構成を示す。この構成は、図2の回転子10に複数の螺旋状通風路14の入口部に案内羽根16を設けたものである。その他の構成は図2と同一である。
Embodiment 2. FIG.
In the spiral ventilation path 14 provided in the rotor 10 of the first embodiment, when the rotor 10 rotates, the air in the machine flows into the spiral ventilation path 14 from the spiral ventilation path 14. There is a possibility that noise due to the whistling phenomenon occurs at the entrance of the ventilation path 14. In the second embodiment, a guide blade 16 that prevents a whistling phenomenon at the entrance of the spiral air passage 14 is provided. FIG. 3 shows the configuration of the rotor 10 according to the second embodiment. In this configuration, guide vanes 16 are provided at the inlets of the plurality of spiral ventilation paths 14 in the rotor 10 of FIG. Other configurations are the same as those in FIG.

このように螺旋状通風路14の入口に案内羽根16を設けると螺旋状通風路14の入口における笛吹現象の発生が防止でき、流入する空気量を多くする作用がある。   If the guide vanes 16 are provided at the entrance of the spiral ventilation path 14 in this way, the whistling phenomenon at the entrance of the spiral ventilation path 14 can be prevented and the amount of air flowing in can be increased.

実施の形態1の回転電機の構成を示す断面図である。FIG. 3 is a cross-sectional view showing the configuration of the rotating electrical machine of the first embodiment. 実施の形態1の回転子の詳細図である。FIG. 3 is a detailed view of the rotor according to the first embodiment. 図2の回転子の螺旋状通風路に案内羽根を設けた詳細図である。FIG. 3 is a detailed view in which guide vanes are provided in the spiral ventilation path of the rotor of FIG. 2.

符号の説明Explanation of symbols

10 回転子、11 回転軸、12 回転子鉄心、13 回転子導体、
14 螺旋状通風路、15 空隙、16 案内羽根、20 固定子、21 固定子鉄心、
22 固定子コイル、23 フレーム、24 通風路、25,26 ブラケット、
27a,27b 軸受。
10 rotor, 11 rotating shaft, 12 rotor core, 13 rotor conductor,
14 spiral ventilation path, 15 air gap, 16 guide vane, 20 stator, 21 stator core,
22 stator coil, 23 frame, 24 ventilation path, 25, 26 bracket,
27a, 27b Bearing.

Claims (2)

回転軸の外側に螺旋状通風路を形成した回転子と、該回転子を囲む固定子と、該固定子の外周部を囲って固定子外周部に通風路を形成し、固定子両側を支持するフレームとを備えたことを特徴とする回転電機。 A rotor having a spiral ventilation path formed on the outer side of the rotating shaft, a stator surrounding the rotor, a ventilation path is formed around the outer periphery of the stator, and supports both sides of the stator. And a rotating electric machine. 上記回転子端部の上記螺旋状通風路の入り口に案内羽根を設けたことを特徴とする請求項1記載の回転電機。 The rotating electrical machine according to claim 1, wherein a guide vane is provided at an entrance of the spiral ventilation path at the end of the rotor.
JP2006067266A 2006-03-13 2006-03-13 Rotary electric machine Pending JP2007244177A (en)

Priority Applications (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102136780A (en) * 2010-01-26 2011-07-27 株式会社日立制作所 Totally enclosed motor
CN104143892A (en) * 2013-05-08 2014-11-12 三菱电机株式会社 Embedded permanent magnet rotary electric machine
CN108110928A (en) * 2018-01-25 2018-06-01 博远机电(嘉兴)有限公司 High pressure ultrahigh speed permanent magnet synchronous motor
CN108312018A (en) * 2018-03-07 2018-07-24 浙江亚特电器有限公司 A kind of hand held electric tool
CN112713695A (en) * 2020-12-21 2021-04-27 中车永济电机有限公司 Cooling fan motor for locomotive
CN116633046A (en) * 2023-07-20 2023-08-22 西门子(天津)传动设备有限责任公司 Stator and motor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102136780A (en) * 2010-01-26 2011-07-27 株式会社日立制作所 Totally enclosed motor
JP2011155720A (en) * 2010-01-26 2011-08-11 Hitachi Ltd Totally enclosed motor
US8502425B2 (en) 2010-01-26 2013-08-06 Hitachi, Ltd. Totally enclosed motor
CN102136780B (en) * 2010-01-26 2013-10-30 株式会社日立制作所 Totally enclosed motor
JP2014220901A (en) * 2013-05-08 2014-11-20 三菱電機株式会社 Permanent magnet built-in type rotary electric machine
US20140333163A1 (en) * 2013-05-08 2014-11-13 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
CN104143892A (en) * 2013-05-08 2014-11-12 三菱电机株式会社 Embedded permanent magnet rotary electric machine
US10320247B2 (en) 2013-05-08 2019-06-11 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
CN108110928A (en) * 2018-01-25 2018-06-01 博远机电(嘉兴)有限公司 High pressure ultrahigh speed permanent magnet synchronous motor
CN108110928B (en) * 2018-01-25 2024-02-09 博远机电(嘉兴)有限公司 High-voltage ultra-high-speed permanent magnet synchronous motor
CN108312018A (en) * 2018-03-07 2018-07-24 浙江亚特电器有限公司 A kind of hand held electric tool
CN108312018B (en) * 2018-03-07 2023-10-13 浙江亚特电器股份有限公司 Hand-held electric tool
CN112713695A (en) * 2020-12-21 2021-04-27 中车永济电机有限公司 Cooling fan motor for locomotive
CN116633046A (en) * 2023-07-20 2023-08-22 西门子(天津)传动设备有限责任公司 Stator and motor
CN116633046B (en) * 2023-07-20 2023-10-03 西门子(天津)传动设备有限责任公司 Stator and motor

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