JP2007325436A - Full-close type liquid-cooled electric motor - Google Patents

Full-close type liquid-cooled electric motor Download PDF

Info

Publication number
JP2007325436A
JP2007325436A JP2006153911A JP2006153911A JP2007325436A JP 2007325436 A JP2007325436 A JP 2007325436A JP 2006153911 A JP2006153911 A JP 2006153911A JP 2006153911 A JP2006153911 A JP 2006153911A JP 2007325436 A JP2007325436 A JP 2007325436A
Authority
JP
Japan
Prior art keywords
rotor
outer frame
electric motor
internal space
cooled electric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2006153911A
Other languages
Japanese (ja)
Other versions
JP4800847B2 (en
Inventor
Seiji Hashimo
誠司 羽下
Nobuhiro Kanei
延浩 兼井
Tetsuro Ogushi
哲朗 大串
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2006153911A priority Critical patent/JP4800847B2/en
Publication of JP2007325436A publication Critical patent/JP2007325436A/en
Application granted granted Critical
Publication of JP4800847B2 publication Critical patent/JP4800847B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a full-close type liquid-cooled electric motor capable of improving a cooling effect of a rotor. <P>SOLUTION: The full-close type liquid-cooled electric motor 100 is provided with an internal frame 11 arranged to cover the circumferential periphery of an external frame 10 and forming a cooling liquid flowing path 11a between itself and the external frame 10. In the motor 100, a first internal space A and a second internal space B are formed between a front lid 6 and the rotor 4 and between a rear lid 7 and the rotor 4, ventilating holes (ventilating hole 2a and external frame ventilating path 10a) for making first and second internal spaces A and B with each other are formed on the external frame 10 and the rotor 4, and a fan 5 for circulating air between the first and second internal spaces A and B through the ventilating holes 2a, 10a is provided at the end of the rotor 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、密閉された機内の固定子をフレームに設けた液冷構造で冷却し、かつ機内に配置された内扇ファンで回転子および機内の空気を冷却するようにした液冷電動機に関するものである。   The present invention relates to a liquid-cooled electric motor in which a hermetically sealed stator is cooled by a liquid cooling structure provided on a frame, and an inner fan fan disposed in the machine cools a rotor and air in the machine. It is.

従来の全閉形液冷電動機においては、内フレームと外フレームから構成される液冷構造にて、固定子、内フレーム及び外フレームを冷却し、軸受および固定子と回転子との間の空隙を介して回転子を冷却する（例えば、特許文献１参照）。   In a conventional fully-enclosed liquid-cooled electric motor, the stator, the inner frame and the outer frame are cooled by a liquid cooling structure composed of an inner frame and an outer frame, and a gap between the bearing and the stator and the rotor is formed. The rotor is cooled through (see, for example, Patent Document 1).

また、回転子両側の回転軸に機内の空気を撹拌するための小型ファンを設け、機内に設置したプレートフィン熱交換器で内気を冷却する（例えば、特許文献２参照）。   In addition, a small fan for agitating the air in the machine is provided on the rotating shafts on both sides of the rotor, and the inside air is cooled by a plate fin heat exchanger installed in the machine (see, for example, Patent Document 2).

特開２００４−２２９４１８号公報JP 2004-229418 A 特開平９−２８５０７２号公報Japanese Patent Laid-Open No. 9-285072

従来の全閉形液冷電動機では、回転子は主に固定子との空隙を介して冷却されるが、空隙の熱抵抗は一般的に大きいため、回転子の発熱量が大きい場合、２次導体が耐熱温度を超え、破損する恐れがあるという問題点があった。   In a conventional fully-enclosed liquid-cooled electric motor, the rotor is cooled mainly through a gap with the stator. However, since the heat resistance of the gap is generally large, when the amount of heat generated by the rotor is large, the secondary conductor However, there is a problem that the temperature exceeds the heat-resistant temperature and may be damaged.

一方、機内の空気を撹拌し、プレートフィン熱交換器で冷却する構造は、構造が複雑でかつ高価であり、さらに振動が大きい車両用の電動機では、強度不足により熱交換器が破損する恐れがあるという問題点があった。   On the other hand, the structure that stirs the air in the machine and cools it with a plate fin heat exchanger is complicated and expensive, and there is a risk that the heat exchanger may be damaged due to insufficient strength in motors for vehicles with large vibrations. There was a problem that there was.

この発明は、上述のような問題点を解消するためになされたもので、回転子の冷却効果を向上させることができる全閉形液冷電動機を提供することを目的としたものである。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a fully-enclosed liquid-cooled electric motor that can improve the cooling effect of the rotor.

上述の課題を解決するために、この発明に係わる全閉形液冷電動機は、輪状の固定子と、固定子を内側に配置する筒状の外フレームと、各々軸受を持ち外フレームの両端に設けられて、この外フレームとともに密閉した空間を形成する前蓋及び後蓋と、軸受に回転自在に支持されて固定子の内側に配置された回転子と、外フレームの内周面を覆うように配設されて、この外フレームとの間に冷却液流路を形成する内フレームとを備えた全閉形液冷電動機において、前蓋及び後蓋と回転子との間にそれぞれ第１内部空間及び第２内部空間が形成されており、外フレームと回転子には、第１内部空間と第２内部空間とを連通する通風穴が形成され、回転子の少なくともいずれか一方の端部に、通風穴を介して第１内部空間と第２内部空間との間で空気を循環させるファンが設けられていることを特徴とする。   In order to solve the above-described problems, a fully-enclosed liquid-cooled electric motor according to the present invention is provided with a ring-shaped stator, a cylindrical outer frame having the stator disposed inside, and bearings at both ends of the outer frame. A front lid and a rear lid that form a sealed space together with the outer frame, a rotor that is rotatably supported by the bearing and disposed inside the stator, and an inner peripheral surface of the outer frame. In a fully-enclosed liquid-cooled electric motor provided with an inner frame that is disposed and forms a coolant flow path between the outer frame and the outer frame, a first internal space and a rotor are respectively provided between the front lid, the rear lid, and the rotor. A second internal space is formed, and the outer frame and the rotor are formed with ventilation holes that communicate the first internal space and the second internal space, and at least one end of the rotor is communicated with. Between the first internal space and the second internal space through the air hole Wherein the fan circulating the air is provided.

この発明に係わる全閉形液冷電動機によれば、前蓋、後蓋及び外フレームで密閉された機内の空気は、内扇ファンにより、外フレームと回転子に形成された通風穴を介して第１内部空間と第２内部空間との間で循環する。冷却液流路に冷却液が随時供給されることにより、固定子が直接冷却され、さらに外フレームの通風穴を通流する高温の機内の空気と熱交換が行われるため、機内の空気が冷却されてこの冷却された空気が回転子を冷却する。これにより、回転子の冷却効果を向上させることができる。   According to the fully-enclosed liquid-cooled electric motor according to the present invention, the air in the machine sealed by the front lid, the rear lid, and the outer frame is passed through the ventilation holes formed in the outer frame and the rotor by the inner fan. It circulates between 1 interior space and 2nd interior space. By supplying coolant to the coolant flow path as needed, the stator is directly cooled, and heat is exchanged with the hot air in the machine that flows through the ventilation holes in the outer frame. This cooled air cools the rotor. Thereby, the cooling effect of a rotor can be improved.

実施の形態１．
図１はこの発明の実施の形態１の全閉形液冷電動機の縦断面図である。図２は図１の全閉形液冷電動機の外フレームと内フレームのＡ−Ａ線に沿う矢視横断面図である。図１及び図２において、本実施の形態の全閉形液冷電動機１００は、輪状の固定子１８と、この固定子１８を内側に配置する筒状の外フレーム１０と、各々軸受７，９を持ち外フレーム１０の両端に設けられて外フレーム１０とともに密閉した空間を形成する前蓋６及び後蓋８と、軸受７，９に支持されて固定子１８の内側に配置された回転子４とを有している。 Embodiment 1 FIG.
1 is a longitudinal sectional view of a fully-enclosed liquid-cooled electric motor according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along the line AA of the outer frame and the inner frame of the fully closed liquid-cooled electric motor shown in FIG. 1 and 2, a fully-enclosed liquid-cooled electric motor 100 according to the present embodiment includes a ring-shaped stator 18, a cylindrical outer frame 10 in which the stator 18 is disposed, and bearings 7 and 9, respectively. A front lid 6 and a rear lid 8 which are provided at both ends of the outer frame 10 to form a sealed space together with the outer frame 10; and a rotor 4 which is supported by bearings 7 and 9 and arranged inside the stator 18; have.

全閉形液冷電動機１００は、さらに外フレーム１０の内側の周面を覆うように配設されて外フレーム１０との間に冷却液流路１１ａを形成する内フレーム１１を有している。このように構成された電動機１００は、内部において前蓋６と回転子４との間に第１内部空間Ａが形成されており、後蓋８と回転子４との間に第２内部空間Ｂが形成されている。回転子４には、第１内部空間Ａと第２内部空間Ｂとを連通する通風穴２ａが形成されている。外フレーム１０には、第１内部空間Ａと第２内部空間Ｂとを連通する外フレーム通風路１０ａ（通風穴）が形成されている。そして、第１内部空間Ａにおいて、回転子４の端部には、内扇ファン５が設けられている。この内扇ファン５は、通風穴２ａ及び外フレーム通風路１０ａを介して第１内部空間Ａと第２内部空間Ｂとの間で空気を循環させる。   The fully-enclosed liquid-cooled electric motor 100 further includes an inner frame 11 that is disposed so as to cover the inner peripheral surface of the outer frame 10 and forms a coolant flow path 11a between the outer frame 10 and the outer frame 10. In the electric motor 100 configured as described above, a first internal space A is formed between the front lid 6 and the rotor 4 inside, and a second internal space B is formed between the rear lid 8 and the rotor 4. Is formed. The rotor 4 is formed with a ventilation hole 2 a that communicates the first internal space A and the second internal space B. The outer frame 10 is formed with an outer frame ventilation path 10a (ventilation hole) that communicates the first inner space A and the second inner space B. In the first internal space A, an inner fan 5 is provided at the end of the rotor 4. The inner fan 5 circulates air between the first internal space A and the second internal space B through the ventilation holes 2a and the outer frame ventilation path 10a.

次に、さらに詳細に説明する。外フレーム１０は、概略円筒状を成し両端部を塞ぐ概略円板状の前蓋６及び後蓋８とともに密閉した空間を形成している。前蓋６及び後蓋８の中央部にそれぞれ軸受７，９が固定されている。円筒状の外フレーム１０の内側に円筒状の内フレーム１１が対向して配設されている。内フレーム１１の外周面に円周に沿って複数本の溝が形成されている。外フレーム１０に内周面と内フレーム１１の外周面とが密着して内フレーム１１に形成された溝によって冷却液流路１１ａが形成されている。内フレーム１１の両端部において、外フレーム１０と内フレーム１１との間には冷却液の漏れを防止する図示しないＯリングが配設されている。冷却液の入口１４及び出口１５は外フレーム１０に設けられ冷却液流路１１ａに通じている。この出入口１４，１５が設けられる位置は、内フレーム１１に設けられた溝形状により変化する。   Next, it demonstrates in detail. The outer frame 10 forms a closed space together with the front lid 6 and the rear lid 8 that are substantially cylindrical and have a substantially disk shape that closes both ends. Bearings 7 and 9 are fixed to central portions of the front lid 6 and the rear lid 8, respectively. A cylindrical inner frame 11 is disposed inside the cylindrical outer frame 10 so as to face each other. A plurality of grooves are formed on the outer peripheral surface of the inner frame 11 along the circumference. A coolant flow path 11 a is formed by a groove formed in the inner frame 11 with the inner peripheral surface and the outer peripheral surface of the inner frame 11 being in close contact with the outer frame 10. At both ends of the inner frame 11, O-rings (not shown) that prevent leakage of coolant are disposed between the outer frame 10 and the inner frame 11. The coolant inlet 14 and outlet 15 are provided in the outer frame 10 and communicate with the coolant flow path 11a. The positions where the entrances 14 and 15 are provided vary depending on the groove shape provided in the inner frame 11.

このように形成された円筒状の内部空間の内部に固定子１８と回転子４が収納されている。円筒状の内部空間は、固定子１８と回転子４とに分断されて軸方向両端部に第１内部空間Ａと第２内部空間Ｂを形成している。図２に良く示されるように、外フレーム１０は一部が肉厚とされており、この肉厚とされた部分に軸線に沿って貫通穴が設けられている。この貫通穴は第１内部空間Ａと第２内部空間Ｂとの間で空気を流通させる外フレーム通風路１０ａを構成している。冷却液流路１１ａは円周に沿って形成され、外フレーム通風路１０ａは軸線に沿って形成されているので両者は交差しており、半径方向に重なる位置関係にある。   The stator 18 and the rotor 4 are accommodated in the cylindrical internal space formed in this way. The cylindrical internal space is divided into a stator 18 and a rotor 4 to form a first internal space A and a second internal space B at both axial ends. As shown well in FIG. 2, the outer frame 10 is partially thickened, and a through hole is provided along the axis in the thickened portion. This through hole constitutes an outer frame ventilation path 10a through which air flows between the first internal space A and the second internal space B. Since the coolant flow path 11a is formed along the circumference and the outer frame ventilation path 10a is formed along the axis, they intersect each other and have a positional relationship overlapping in the radial direction.

輪状の固定子１８は、内フレーム１１の内側に配設されている。固定子１８は、概略円筒状を成し全周にわたり軸線方向に延びるスロットが形成された固定子鉄心１６と、固定子鉄心１６のスロットに収納されるように鉄心１６のティースに巻回された固定子巻線１７とから構成されている。   The ring-shaped stator 18 is disposed inside the inner frame 11. The stator 18 is wound around the teeth of the iron core 16 so as to be housed in the stator core 16 having a substantially cylindrical shape and having slots extending in the axial direction over the entire circumference. And a stator winding 17.

軸受７，９に回転自在に支持される回転子４は、輪状の固定子１８のさらに内側に配設されている。回転子４は、軸受７，９に軸支された回転軸１と、回転軸１を貫通させる概略円筒状の回転子鉄心２と、回転子鉄心２の外周部に全周にわたって等間隔に埋め込まれ、かつその両端をリング状導体に接続された回転子導体３と、回転子鉄心２の片側の端部にて回転軸１に固着された内扇ファン５とから構成されている。回転子鉄心２には軸線に沿って延びる複数の貫通穴が全周にわたり等間隔設けられている。この貫通穴は第１内部空間Ａと第２内部空間Ｂとの間で空気を流通させる通風穴２ａを構成している。回転子４は、回転子鉄心２がわずかの間隙を持って固定子鉄心１６と対向するように配置されている。   The rotor 4 that is rotatably supported by the bearings 7 and 9 is disposed further inside the ring-shaped stator 18. The rotor 4 is embedded at equal intervals over the entire circumference in the outer periphery of the rotor core 2, the rotating shaft 1 pivotally supported by the bearings 7 and 9, the substantially cylindrical rotor core 2 passing through the rotating shaft 1. The rotor conductor 3 is connected to the ring-shaped conductor at both ends, and the inner fan 5 is fixed to the rotating shaft 1 at one end of the rotor core 2. The rotor core 2 is provided with a plurality of through holes extending along the axis at equal intervals over the entire circumference. This through hole constitutes a ventilation hole 2a through which air flows between the first internal space A and the second internal space B. The rotor 4 is arranged so that the rotor core 2 faces the stator core 16 with a slight gap.

このように構成された全閉形液冷電動機１００は、例えば車両に駆動用電動機として搭載される場合、回転軸１の駆動側１ａを減速歯車（図示せず）を介して車軸（図示せず）に連結され、車軸に取り付けられた車輪（図示せず）を駆動して車両を走行させる。両蓋６，８及び外フレーム１０で密閉された機内の空気は、内扇ファン５により、通風穴２ａ及び外フレーム通風路１０ａを介して第１内部空間Ａと第２内部空間Ｂとの間で循環する。冷却液流路１１ａに冷却液出入口１４，１５を介して冷却液が随時供給されることにより、固定子１８が直接冷却され、さらに隣接した外フレーム通風路１０ａを通流する高温の機内の空気と熱交換が行われるため、機内の空気が冷却されてこの冷却された空気が回転子４を冷却する。   When the fully-enclosed liquid-cooled electric motor 100 configured as described above is mounted on a vehicle as a driving electric motor, for example, the driving side 1a of the rotating shaft 1 is connected to an axle (not shown) via a reduction gear (not shown). The vehicle is driven by driving a wheel (not shown) connected to the axle. The air in the machine sealed by the lids 6 and 8 and the outer frame 10 is moved between the first internal space A and the second internal space B by the internal fan 5 via the ventilation hole 2a and the outer frame ventilation path 10a. Circulate with. The coolant is supplied to the coolant channel 11a through the coolant inlets 14 and 15 as needed, so that the stator 18 is directly cooled, and the high-temperature in-machine air that flows through the adjacent outer frame ventilation channel 10a. Therefore, the air in the machine is cooled and the cooled air cools the rotor 4.

このように構成された全閉形液冷電動機１００においては、外フレーム１０と回転子４に第１内部空間Ａと第２内部空間Ｂとを連通する外フレーム通風路１０ａ及び通風穴２ａがそれぞれが形成され、回転子４の端部に、外フレーム通風路１０ａ及び通風穴２ａを介して第１内部空間Ａと第２内部空間Ｂとの間で空気を循環させる内扇ファン５を設けたことにより、以下の効果を得ることができる。すなわち、回転子鉄心２および回転子導体３から発生した熱が回転子４の通風穴２ａに流れる機内の空気へ移動し、その熱を受けて機内の空気は温度上昇する。温度上昇した機内の空気は、内扇ファン５により外フレーム１０の外フレーム通風路１０ａに流れ込むが、外フレーム１０は冷却液により冷却されているため、温度上昇した機内の空気を冷却し、回転子４で受けた熱を外フレーム１０で放熱する。外フレーム１０で冷却された空気は回転子４の通風穴２ａへ流れ込み、再び回転子４の熱を受ける。このように、機内の空気の循環風を利用して、回転子４の熱をフレームの冷却液に放熱することで、回転子４の冷却効果を向上させることができる。   In the fully-enclosed liquid-cooled electric motor 100 configured as described above, the outer frame ventilation path 10a and the ventilation hole 2a that communicate the first inner space A and the second inner space B with the outer frame 10 and the rotor 4 are respectively provided. An inner fan 5 that is formed and that circulates air between the first inner space A and the second inner space B through the outer frame ventilation path 10a and the ventilation hole 2a is provided at the end of the rotor 4. Thus, the following effects can be obtained. That is, the heat generated from the rotor core 2 and the rotor conductor 3 moves to the air in the machine that flows through the ventilation holes 2a of the rotor 4, and the air inside the machine rises in temperature due to the heat. The air in the machine whose temperature has risen flows into the outer frame ventilation path 10a of the outer frame 10 by the inner fan 5 but the outer frame 10 is cooled by the cooling liquid. The heat received by the child 4 is radiated by the outer frame 10. The air cooled by the outer frame 10 flows into the ventilation hole 2a of the rotor 4 and receives the heat of the rotor 4 again. Thus, the cooling effect of the rotor 4 can be improved by dissipating the heat of the rotor 4 to the coolant of the frame using the circulating air of the air in the machine.

また、固定子１８および冷却液流路１１ａの外側に位置する外フレーム１０に、機内空気の通風路である外フレーム通風路１０ａを設けることで、外フレーム通風路１０ａの通風断面積を大きくしても、固定子４の冷却効果を損なうことが無く、以下の問題点を回避することができる。例えば、内フレーム１１の内側に通風路のための溝を設けると、その部分は固定子鉄心１６との接触がなくなり、伝熱面積が減少するため、固定子鉄心１６の冷却効果が低下する。また、固定子鉄心１６外側に通風路を設けると、やはりその分内フレーム１１との接触面積及び伝熱面積が減少し、固定子鉄心１６の冷却効果が低下すると共に、固定子鉄心１６の磁束が有効利用できなくなり、電動機の効率が低下する。   Further, by providing the outer frame 10 located on the outer side of the stator 18 and the coolant flow path 11a with the outer frame ventilation path 10a that is the ventilation path of the in-machine air, the ventilation cross-sectional area of the outer frame ventilation path 10a is increased. However, the cooling effect of the stator 4 is not impaired, and the following problems can be avoided. For example, if a groove for the ventilation path is provided inside the inner frame 11, the contact with the stator core 16 is lost in that portion, and the heat transfer area is reduced, so that the cooling effect of the stator core 16 is reduced. Further, if an air passage is provided outside the stator core 16, the contact area with the inner frame 11 and the heat transfer area are reduced accordingly, the cooling effect of the stator core 16 is reduced, and the magnetic flux of the stator core 16 is reduced. Cannot be used effectively, and the efficiency of the motor is reduced.

以上のように、本実施の形態の全閉形液冷電動機１００においては、内扇ファン５と、通風穴２ａと、外フレーム通風路１０ａとを設けたことにより、回転子４の冷却効果を向上させることができる。   As described above, in the fully closed liquid-cooled electric motor 100 according to the present embodiment, the cooling effect of the rotor 4 is improved by providing the inner fan 5, the ventilation hole 2a, and the outer frame ventilation path 10a. Can be made.

なお、本実施の形態の冷却液流路１１ａは、内部空間を形成する外フレーム１０とその内側の周面を覆うように配設された内フレーム１１との間に形成されている。しかしながら、冷却液流路１１ａはこの構成に限らず、内部空間を形成するフレームとその外側の周面を覆うように配設されたフレームとの間に形成されてもよい。さらに、流路となる溝は対向するいずれのフレームに設けられてもよいし、両方のフレームに設けられてもよい。   The coolant flow path 11a of the present embodiment is formed between the outer frame 10 that forms the internal space and the inner frame 11 that is disposed so as to cover the inner peripheral surface thereof. However, the coolant flow path 11a is not limited to this configuration, and may be formed between a frame that forms the internal space and a frame that is disposed so as to cover the outer peripheral surface thereof. Furthermore, the groove serving as the flow path may be provided in any frame facing each other, or may be provided in both frames.

また、本実施の形態の内扇ファン５は、回転子４の反駆動側の端部に設けられているが、これに限らず、他側の端部に設けられてもよいし、両端部に設けられてもよい。すなわち、内扇ファン５は第１内部空間Ａと第２内部空間Ｂのいずれか一方に設けられてもよいし、両方に設けられてもよい。   Moreover, although the internal fan 5 of this Embodiment is provided in the edge part of the counter drive side of the rotor 4, not only this but it may be provided in the edge part of the other side, and both ends May be provided. That is, the internal fan 5 may be provided in one of the first internal space A and the second internal space B, or may be provided in both.

実施の形態２．
図３はこの発明の実施の形態２の全閉形液冷電動機の外フレームと内フレームの横断面図である。本実施の形態の全閉形液冷電動機においては、外フレーム１０に形成された外フレーム通風路１０ｂが、断面円形の複数本の細穴とされている。その他の構成は実施の形態１と同様である。 Embodiment 2. FIG.
3 is a cross-sectional view of an outer frame and an inner frame of a fully-closed liquid-cooled electric motor according to Embodiment 2 of the present invention. In the fully-enclosed liquid-cooled electric motor of the present embodiment, the outer frame ventilation path 10b formed in the outer frame 10 is a plurality of narrow holes having a circular cross section. Other configurations are the same as those of the first embodiment.

本実施の形態の全閉形液冷電動機においては、外フレーム通風路１０ｂを断面円形の複数本の細穴とすることにより、空気と通風路の伝熱面積の拡大を図っている。これにより、機内の空気および回転子４の冷却効果を向上させることができる。   In the fully-enclosed liquid-cooled electric motor of the present embodiment, the heat transmission area of the air and the ventilation path is increased by forming the outer frame ventilation path 10b as a plurality of thin holes having a circular cross section. Thereby, the cooling effect of the air in a machine and the rotor 4 can be improved.

この発明にかかる全閉形液冷電動機は、例えば車両に駆動源として搭載されるような小型で高出力が要求される電動機に適用されて好適なものである。   The fully-enclosed liquid-cooled electric motor according to the present invention is suitably applied to a small electric motor that is required to have a high output, for example, mounted as a drive source in a vehicle.

この発明の実施の形態１の全閉形液冷電動機の縦断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of the fully-closed liquid cooling motor of Embodiment 1 of this invention. 図１の全閉形液冷電動機の外フレームと内フレームのＡ−Ａ線に沿う矢視横断面図である。It is an arrow cross-sectional view which follows the AA line of the outer frame and inner frame of the fully closed liquid-cooled electric motor of FIG. この発明の実施の形態２の全閉形液冷電動機の外フレームと内フレームの横断面図である。It is a cross-sectional view of the outer frame and the inner frame of the fully closed liquid-cooled electric motor according to Embodiment 2 of the present invention.

符号の説明Explanation of symbols

１ 回転軸
２ 回転子鉄心
２ａ 通風穴
３ 回転子導体
４ 回転子
５ 内扇ファン
６ 前蓋
７，９ 軸受
８ 後蓋
１０ 外フレーム
１０ａ 外フレーム通風路（通風穴）
１１ 内フレーム
１１ａ 冷却液流路
１４ 冷却液入口
１５ 冷却液出口
１６ 固定子鉄心
１７ 固定子巻線
１８ 固定子
１００ 全閉形液冷電動機 DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Rotor core 2a Ventilation hole 3 Rotor conductor 4 Rotor 5 Inner fan 6 Front lid 7, 9 Bearing 8 Rear lid 10 Outer frame 10a Outer frame ventilation path (ventilation hole)
DESCRIPTION OF SYMBOLS 11 Inner frame 11a Coolant flow path 14 Coolant inlet 15 Coolant outlet 16 Stator iron core 17 Stator winding 18 Stator 100 Fully closed liquid cooling motor

Claims (3)

輪状の固定子と、
前記固定子を内側に配置する筒状の外フレームと、
各々軸受を持ち前記外フレームの両端に設けられて該外フレームとともに密閉した空間を形成する前蓋及び後蓋と、
前記軸受に回転自在に支持されて前記固定子の内側に配置された回転子と、
前記外フレームの内周面を覆うように配設されて該外フレームとの間に冷却液流路を形成する内フレームとを備えた全閉形液冷電動機において、
前記前蓋及び前記後蓋と前記回転子との間にそれぞれ第１内部空間及び第２内部空間が形成されており、
前記外フレームと前記回転子には、前記第１内部空間と前記第２内部空間とを連通する通風穴が形成され、
前記回転子の少なくともいずれか一方の端部に、前記通風穴を介して前記第１内部空間と前記第２内部空間との間で空気を循環させるファンが設けられている
ことを特徴とする全閉形液冷電動機。 A ring-shaped stator,
A cylindrical outer frame in which the stator is disposed inside;
A front lid and a rear lid each having a bearing and provided at both ends of the outer frame to form a sealed space with the outer frame;
A rotor rotatably supported by the bearing and disposed inside the stator;
In a fully-enclosed liquid-cooled electric motor provided with an inner frame disposed so as to cover the inner peripheral surface of the outer frame and forming a coolant flow path between the outer frame,
A first internal space and a second internal space are formed between the front lid and the rear lid and the rotor, respectively.
The outer frame and the rotor are formed with ventilation holes communicating the first internal space and the second internal space,
A fan that circulates air between the first internal space and the second internal space through the ventilation hole is provided at at least one end of the rotor. Closed liquid-cooled electric motor. 前記外フレームに形成された前記通風穴が、軸方向に延びる複数の穴である
ことを特徴とする請求項１に記載の全閉形液冷電動機。 The fully-closed liquid-cooled electric motor according to claim 1, wherein the ventilation holes formed in the outer frame are a plurality of holes extending in the axial direction. 前記通風穴が、前記冷却液流路と半径方向に重なる
ことを特徴とする請求項１または２に記載の全閉形液冷電動機。 The fully-enclosed liquid-cooled electric motor according to claim 1, wherein the ventilation hole overlaps the coolant flow path in a radial direction.
JP2006153911A 2006-06-01 2006-06-01 Fully closed liquid-cooled electric motor Active JP4800847B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006153911A JP4800847B2 (en) 2006-06-01 2006-06-01 Fully closed liquid-cooled electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006153911A JP4800847B2 (en) 2006-06-01 2006-06-01 Fully closed liquid-cooled electric motor

Publications (2)

Publication Number Publication Date
JP2007325436A true JP2007325436A (en) 2007-12-13
JP4800847B2 JP4800847B2 (en) 2011-10-26

Family

ID=38857731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006153911A Active JP4800847B2 (en) 2006-06-01 2006-06-01 Fully closed liquid-cooled electric motor

Country Status (1)

Country Link
JP (1) JP4800847B2 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010044141A1 (en) * 2008-10-14 2010-04-22 三菱電機株式会社 Totally enclosed liquid-cooled motor
CN101841213A (en) * 2010-05-27 2010-09-22 西安盾安电气有限公司 Wind-driven generator adopting air-water cooling mode
JP2011211816A (en) * 2010-03-30 2011-10-20 Hitachi Ltd Permanent magnetic rotating electric machine, and wind power generating system
KR101108286B1 (en) 2008-04-09 2012-02-07 리브헤어 베르크 비버라흐 게엠베하 Liquid-cooled electric machine, method for cooling such electric machine and hoisting device including such electric machine
US20120119602A1 (en) * 2010-11-12 2012-05-17 Hamilton Sundstrand Corporation Cooling of Permanent Magnet Electric Machine
US20120212083A1 (en) * 2011-02-18 2012-08-23 Hamilton Sundstrand Corporation Cooling of permanent magnet electric machine
US20120212082A1 (en) * 2011-02-18 2012-08-23 Hamilton Sundstrand Corporation Cooling of permanent magnet electric machine
KR101276065B1 (en) * 2009-09-08 2013-06-14 현대중공업 주식회사 Cooling system of water jacket style generator
CN103187829A (en) * 2011-12-30 2013-07-03 哈米尔顿森德斯特兰德空间系统国际有限公司 Cooling of permanent magnet motor
JP2015162936A (en) * 2014-02-26 2015-09-07 株式会社東芝 Totally-enclosed motor
WO2018098567A1 (en) 2016-11-29 2018-06-07 Tm4 Inc. Electric machine provided with an enclosed cooling assembly paired to an open cooling assembly
US10320247B2 (en) 2013-05-08 2019-06-11 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
CN111478519A (en) * 2019-01-23 2020-07-31 丰田自动车株式会社 Rotating electrical machine
WO2023124632A1 (en) * 2021-12-30 2023-07-06 西安中车永电捷力风能有限公司 Compact semi-direct drive permanent magnet synchronous wind turbine generator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159872U (en) * 1982-04-20 1983-10-25 株式会社東芝 rotating electric machine
JP2003219605A (en) * 2002-01-24 2003-07-31 Nissan Motor Co Ltd Cooling structure of motor
JP2004364365A (en) * 2003-06-02 2004-12-24 Toshiba Corp Totally-enclosed self-cooled motor for driving vehicle and process for manufacturing cooler for motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159872U (en) * 1982-04-20 1983-10-25 株式会社東芝 rotating electric machine
JP2003219605A (en) * 2002-01-24 2003-07-31 Nissan Motor Co Ltd Cooling structure of motor
JP2004364365A (en) * 2003-06-02 2004-12-24 Toshiba Corp Totally-enclosed self-cooled motor for driving vehicle and process for manufacturing cooler for motor

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101108286B1 (en) 2008-04-09 2012-02-07 리브헤어 베르크 비버라흐 게엠베하 Liquid-cooled electric machine, method for cooling such electric machine and hoisting device including such electric machine
WO2010044141A1 (en) * 2008-10-14 2010-04-22 三菱電機株式会社 Totally enclosed liquid-cooled motor
KR101276065B1 (en) * 2009-09-08 2013-06-14 현대중공업 주식회사 Cooling system of water jacket style generator
US8653703B2 (en) 2010-03-30 2014-02-18 Hitachi, Ltd. Permanent magnetic rotating electric machine and wind power generating system
JP2011211816A (en) * 2010-03-30 2011-10-20 Hitachi Ltd Permanent magnetic rotating electric machine, and wind power generating system
CN101841213A (en) * 2010-05-27 2010-09-22 西安盾安电气有限公司 Wind-driven generator adopting air-water cooling mode
US20120119602A1 (en) * 2010-11-12 2012-05-17 Hamilton Sundstrand Corporation Cooling of Permanent Magnet Electric Machine
US8847444B2 (en) * 2010-11-12 2014-09-30 Hamilton Sundstrand Space Systems International, Inc. Cooling of permanent magnet electric machine
US20120212083A1 (en) * 2011-02-18 2012-08-23 Hamilton Sundstrand Corporation Cooling of permanent magnet electric machine
US8604651B2 (en) * 2011-02-18 2013-12-10 Hamilton Sundstrand Space Systems International, Inc. Cooling of permanent magnet electric machine
US8760015B2 (en) * 2011-02-18 2014-06-24 Hamilton Sundstrand Corporation Cooling of permanent magnet electric machine
US20120212082A1 (en) * 2011-02-18 2012-08-23 Hamilton Sundstrand Corporation Cooling of permanent magnet electric machine
CN103187829A (en) * 2011-12-30 2013-07-03 哈米尔顿森德斯特兰德空间系统国际有限公司 Cooling of permanent magnet motor
US10320247B2 (en) 2013-05-08 2019-06-11 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
JP2015162936A (en) * 2014-02-26 2015-09-07 株式会社東芝 Totally-enclosed motor
WO2018098567A1 (en) 2016-11-29 2018-06-07 Tm4 Inc. Electric machine provided with an enclosed cooling assembly paired to an open cooling assembly
CN110168876A (en) * 2016-11-29 2019-08-23 Tm4股份有限公司 It is provided with the motor of the closed cooling component pairs of with open cooling component
EP3549242A4 (en) * 2016-11-29 2020-07-08 TM4 Inc. Electric machine provided with an enclosed cooling assembly paired to an open cooling assembly
US11218057B2 (en) 2016-11-29 2022-01-04 Dana Tm4 Inc. Electric machine provided with an enclosed cooling assembly paired to an open cooling assembly
CN111478519A (en) * 2019-01-23 2020-07-31 丰田自动车株式会社 Rotating electrical machine
CN111478519B (en) * 2019-01-23 2022-06-17 丰田自动车株式会社 Rotating electrical machine
WO2023124632A1 (en) * 2021-12-30 2023-07-06 西安中车永电捷力风能有限公司 Compact semi-direct drive permanent magnet synchronous wind turbine generator

Also Published As

Publication number Publication date
JP4800847B2 (en) 2011-10-26

Similar Documents

Publication Publication Date Title
JP4800847B2 (en) Fully closed liquid-cooled electric motor
JP4592693B2 (en) Fully enclosed fan motor
AU2017370503B2 (en) Motor rotor support frame and motor
JP3882637B2 (en) Motor cooling device
US20180205294A1 (en) Cooling structure for dynamo-electric machine
JP4082359B2 (en) Cooling structure of rotating electric machine
JP4817800B2 (en) Fully enclosed electric motor for vehicle drive
JP6059906B2 (en) Axial gap type rotating electrical machine
JP2010220417A (en) Totally enclosed main motor for vehicle
JP6638427B2 (en) Outer rotor type rotary electric machine
JP2019176648A (en) Stator frame, stator, and rotary electric machine
WO2005124971A1 (en) Totally-enclosed fancooled type motor
JP2008029150A (en) Fully closed motor
CN112117858A (en) Motor with cooling structure
JP4928986B2 (en) Fully closed electric motor for vehicle drive
JP2015162936A (en) Totally-enclosed motor
JP2017060319A (en) Cooling structure for electric motor
WO2010044141A1 (en) Totally enclosed liquid-cooled motor
JP4423271B2 (en) Electric motor
JP4891656B2 (en) Fully enclosed motor for vehicles
JP2007244177A (en) Rotary electric machine
CN107154697B (en) Outer rotor type motor
WO2008059687A1 (en) Rotary motor
JP3594007B2 (en) Rotating electric machine
JP2008086164A (en) Totally-enclosed external fan type motor

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20081217

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110728

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110802

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110804

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140812

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4800847

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250