JPH05103443A - Cooling device for motor - Google Patents
Cooling device for motorInfo
- Publication number
- JPH05103443A JPH05103443A JP3287073A JP28707391A JPH05103443A JP H05103443 A JPH05103443 A JP H05103443A JP 3287073 A JP3287073 A JP 3287073A JP 28707391 A JP28707391 A JP 28707391A JP H05103443 A JPH05103443 A JP H05103443A
- Authority
- JP
- Japan
- Prior art keywords
- cooling air
- motor
- air passage
- rotor
- drive circuit
- 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
Links
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は電動機の冷却装置、特
に、駆動回路が一体的に組み付けられる電動機の冷却装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor cooling device, and more particularly to an electric motor cooling device in which a drive circuit is integrally assembled.
【０００２】[0002]
【従来の技術】従来の電動機の冷却装置としては、例え
ば、特開昭６２−６４２４６号公報に記載されたものが
知られる。この冷却装置は、回転子の外方にヨークを配
置し、このヨークの内周に界磁磁極を、また、外周にパ
ワーＩＣを取り付け、このパワーＩＣをケーシングで覆
ったものである。2. Description of the Related Art As a conventional cooling device for an electric motor, for example, one disclosed in Japanese Patent Laid-Open No. 62-64246 is known. In this cooling device, a yoke is arranged outside the rotor, a field magnetic pole is attached to the inner circumference of the yoke, and a power IC is attached to the outer circumference, and the power IC is covered with a casing.
【０００３】この冷却装置は、パワーＩＣをヨークに組
み付けて電動機と一体化し、電圧降下の低減等を図る。
そして、回転子とヨークの界磁磁極との間、また、ヨー
クのパワーＩＣとケーシングの間にそれぞれ隙間、すな
わち冷却風の通路が形成され、この通路を流れる冷却風
で回転子とパワーＩＣとを冷却する。In this cooling device, a power IC is mounted on a yoke and integrated with a motor to reduce a voltage drop.
Then, gaps, that is, passages of cooling air are formed between the rotor and the field magnetic poles of the yoke, and between the power IC of the yoke and the casing, respectively, and the cooling air flowing through the passages causes the rotor and the power IC to be separated from each other. To cool.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来の電動機の冷却装置にあっては、ヨークの外周に
パワーＩＣを配置してケーシングで覆い、ヨークの内外
に冷却用の通路を形成するため、全体として径方向に大
型化するという問題があった。この発明は、上記問題に
鑑みてなされたもので、電動機に径方向に大型化するこ
となく駆動回路を一体に組み付けることができ、さら
に、駆動回路の冷却を効果的に行なえるようにした電動
機の冷却装置を提供することを目的とする。However, in the above-described conventional cooling device for the electric motor, the power IC is arranged on the outer periphery of the yoke and covered with the casing to form the cooling passages inside and outside the yoke. However, there is a problem in that the size of the entire structure increases in the radial direction. The present invention has been made in view of the above problems, and a drive circuit can be integrally assembled to the electric motor without increasing the size in the radial direction, and the electric motor can be effectively cooled. It is an object of the present invention to provide a cooling device of.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、この発明にかかる電動機の冷却装置は、モータケー
ス内にロータとステータとを配置し、これらロータおよ
びステータの少なくとも一方に冷却風を導くモータ冷却
風路をモータケースに形成するとともに、モータケース
のロータ回転軸方向一側に駆動回路が設けられたホルダ
部材を組み付け、このホルダ部材の駆動回路に冷却風を
導く回路冷却風路を前記モータ冷却風路から回転軸方向
に離隔して形成し、この回路冷却風路と前記モータ冷却
風路とを連通させるとともに、これら冷却風路の連通部
にロータと一体的に回転して両冷却風路に冷却風を生じ
させるファンを配置した。In order to achieve the above object, a cooling device for an electric motor according to the present invention has a rotor and a stator arranged in a motor case, and guides cooling air to at least one of the rotor and the stator. The motor cooling air passage is formed in the motor case, and a holder member having a drive circuit provided on one side of the motor case in the rotor rotation axis direction is assembled, and a circuit cooling air passage for guiding the cooling air to the drive circuit of the holder member is provided. The circuit cooling air passage is formed to be separated from the motor cooling air passage in the direction of the rotation axis, and the circuit cooling air passage and the motor cooling air passage are communicated with each other. A fan for generating cooling air was arranged in the air passage.
【０００６】[0006]
【作用】この発明の電動機の冷却装置は、ホルダ部材を
モータケースの回転軸方向一側に設け、モータ冷却風路
と回路冷却風路とを回転軸方向に離隔させるため、全体
としての径方向への大型化が防止でき、また、電動機と
駆動回路との熱的な干渉が防止できる。さらに、これら
冷却風路の連通部分に設けたファンで両冷却風路に冷却
風を生じさせることができるため、より小型化、またさ
らに、部品点数の削減も図れる。In the motor cooling device of the present invention, the holder member is provided on one side in the rotation axis direction of the motor case, and the motor cooling air passage and the circuit cooling air passage are separated from each other in the rotation axis direction. It is possible to prevent an increase in size and to prevent thermal interference between the electric motor and the drive circuit. Further, since the cooling air can be generated in both cooling air passages by the fan provided in the communicating portion of these cooling air passages, the size can be further reduced and the number of parts can be reduced.
【０００７】[0007]
【実施例】以下、この発明の実施例を図面を参照して説
明する。図１から図３はこの発明の一実施例にかかる電
動機の冷却装置を示し、図１が電動機の縦断面図、図２
が主要部品の側面図、図３が同主要部品の斜視図であ
る。Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a cooling device for an electric motor according to an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of the electric motor, and FIG.
Is a side view of the main part, and FIG. 3 is a perspective view of the main part.
【０００８】図１において、１１は大径部１１ａと小径
部１１ｂとを有するケース本体であり、ケース本体１１
は、大径部１１ａ側が開口し、小径側が一体に閉止され
る。このケース本体１１には、開口に端蓋１２が固設さ
れて開口が閉止され、この端蓋１２と閉止端との間に回
転軸１３が架設される。このケース本体１１は大径部１
１ａがモータケースに相当し、また、ケース本体１１の
小径部１１ｂがホルダ部材に相当する。In FIG. 1, reference numeral 11 denotes a case body having a large diameter portion 11a and a small diameter portion 11b.
Is open on the large diameter portion 11a side and is integrally closed on the small diameter side. An end cover 12 is fixed to the opening of the case body 11 to close the opening, and a rotary shaft 13 is installed between the end cover 12 and the closed end. The case body 11 has a large diameter portion 1.
1a corresponds to a motor case, and the small diameter portion 11b of the case body 11 corresponds to a holder member.
【０００９】ケース本体１１には閉止端に複数の通孔１
４が回転軸１３軸方向に、また、大径部１１ａの小径部
１１ｂ側部分に径方向に開口する複数の通孔１６が周方
向等間隔に形成され、同様に、端蓋１２にも複数の通孔
１５が回転軸１３軸方向に形成される。通孔１４および
通孔１６は大径部１１ａ内に、通孔１５は小径部１１ｂ
内に開口し、大径部１１ａ内には通孔１４から通孔１６
に至るモータ冷却風路３０が、小径部１１ｂ内には通孔
１５から通孔１６に至る回路冷却風路３１が形成され
る。The case body 11 has a plurality of through holes 1 at its closed end.
A plurality of through holes 16 are formed in the axial direction of the rotary shaft 13 and at the small diameter portion 11b side portion of the large diameter portion 11a at equal intervals in the circumferential direction. Through hole 15 is formed in the axial direction of the rotating shaft 13. The through hole 14 and the through hole 16 are in the large diameter portion 11a, and the through hole 15 is in the small diameter portion 11b.
Through the through hole 14 through the large diameter portion 11a.
And a circuit cooling air passage 31 extending from the through hole 15 to the through hole 16 is formed in the small diameter portion 11b.
【００１０】また、ケース本体１１には、大径部１１ａ
の内壁面にステータ２１が固設され、小径部１１ｂの内
壁面にＦＥＴ等のスイッチ素子が取り付けられて駆動回
路２２を構成する。ステータ２１および後述のロータは
モータ冷却風路３０に臨んで、また、駆動回路２２は回
路冷却風路３１内に配置される。周知のように、ステー
タ２１はヨーク２１ａにコイル２１ｂを巻線して構成さ
れ、コイル２１ｂが駆動回路２２を介し電源に接続され
る。駆動回路２２は、スイッチ素子をブリッジ状に結線
して構成され、コントローラから入力する信号に応じコ
イル２１ｂを通電する。The case body 11 has a large diameter portion 11a.
A stator 21 is fixedly mounted on the inner wall surface of the drive circuit 22, and a switch element such as an FET is attached to the inner wall surface of the small diameter portion 11b to form a drive circuit 22. The stator 21 and a rotor described below face the motor cooling air passage 30, and the drive circuit 22 is arranged in the circuit cooling air passage 31. As is well known, the stator 21 is configured by winding a coil 21b around a yoke 21a, and the coil 21b is connected to a power source via a drive circuit 22. The drive circuit 22 is configured by connecting switch elements in a bridge shape, and energizes the coil 21b according to a signal input from the controller.
【００１１】回転軸１３は、図中左端が端蓋１２をベア
リング１７を介し回転自在に貫通して外部に突出し、図
中右端がケース本体１１の閉止端にベアリング１８で回
転自在に支持される。回転軸１３には、大径部１１ａ内
にロータ１９が固設され、また、ロータ１９に隣接して
小径部１１ｂ側に送風ファン２０が固設される。ロータ
１９と前述したステータ２１との間にはモータ冷却風路
３０を構成する微小の隙間が形成される。The rotating shaft 13 has a left end in the drawing rotatably penetrating the end cover 12 via a bearing 17 and projects to the outside, and a right end in the drawing is rotatably supported by a bearing 18 at a closed end of the case body 11. .. A rotor 19 is fixed to the rotating shaft 13 in the large diameter portion 11a, and a blower fan 20 is fixed to the small diameter portion 11b side adjacent to the rotor 19. A minute gap forming the motor cooling air passage 30 is formed between the rotor 19 and the stator 21 described above.
【００１２】冷却ファン２０は、図２および図３に示す
ように、２つのファン２０ａとファン２０ｂとを回転軸
軸方向に組み付けて構成される。この冷却ファン２０
は、図１中に矢印で示すように、ファン２０ａが大径部
１１ａ内すなわちモータ冷却風路３０に冷却風を生じさ
せ、また、ファン２０ｂが回路冷却風路３１内に冷却風
を生じさせる。As shown in FIGS. 2 and 3, the cooling fan 20 is constructed by assembling two fans 20a and 20b in the axial direction of the rotating shaft. This cooling fan 20
1, the fan 20a produces cooling air in the large-diameter portion 11a, that is, the motor cooling air passage 30, and the fan 20b produces cooling air in the circuit cooling air passage 31, as shown by the arrow in FIG. ..
【００１３】この実施例の電動機の冷却装置にあって
は、ステータ２１のコイル２１ｂが駆動回路２２から通
電され、ロータ１９が回転する。この時、コイル２１ｂ
および駆動回路２２等は発熱するが、送風ファン２０が
ロータ１９と一体に回転し、この送風ファン２０の回転
でモータ冷却風路３０と回路冷却風路３１に冷却風が流
れ、コイル２１ｂおよび駆動回路２２等が冷却される。In the motor cooling device of this embodiment, the coil 21b of the stator 21 is energized by the drive circuit 22 to rotate the rotor 19. At this time, the coil 21b
Although the drive circuit 22 and the like generate heat, the blower fan 20 rotates integrally with the rotor 19, and the rotation of the blower fan 20 causes cooling air to flow through the motor cooling air passage 30 and the circuit cooling air passage 31 to cause the coil 21b and the drive. The circuit 22 and the like are cooled.
【００１４】ここで、モータ冷却風路３０においては、
冷却風は端蓋１２の通孔１５からモータケース１０内に
流入してロータ１９とステータ２１との間を通過し、ロ
ータ１９とステータ２１とを冷却してケース本体１１の
通孔から排出する。また、回路冷却風路３１において
は、通孔１６から冷却風が流入し、この冷却風が駆動回
路２２を冷却して通孔から排出される。したがって、ロ
ータ１９およびステータ２１等の電動機自体の冷却と駆
動回路２２の冷却とを熱的に遮絶して行なえ、冷却性を
向上できる。Here, in the motor cooling air passage 30,
The cooling air flows into the motor case 10 through the through hole 15 of the end cover 12, passes between the rotor 19 and the stator 21, cools the rotor 19 and the stator 21, and is discharged from the through hole of the case body 11. .. Further, in the circuit cooling air passage 31, the cooling air flows in from the through hole 16, the cooling air cools the drive circuit 22 and is discharged from the through hole. Therefore, the cooling of the electric motor itself such as the rotor 19 and the stator 21 and the cooling of the drive circuit 22 can be thermally interrupted to improve the cooling performance.
【００１５】そして、この電動機は、ケース本体１１に
ロータの回転軸方向に離隔して大径部１１ａと小径部１
１ｂとを形成し、大径部１１ａ内にロータ１９とステー
タ２１とを配置し、小径部１１ｂに駆動回路２２を設け
る。このため、電動機全体として径方向に大型化するこ
とがなく、その小型化が図れる。In this motor, the case body 11 is separated from the large-diameter portion 11a and the small-diameter portion 1 in the direction of the rotation axis of the rotor.
1b, the rotor 19 and the stator 21 are arranged in the large diameter portion 11a, and the drive circuit 22 is provided in the small diameter portion 11b. Therefore, the size of the electric motor as a whole can be reduced without increasing the size in the radial direction.
【００１６】[0016]
【発明の効果】以上説明したように、この発明にかかる
電動機の冷却装置によれば、電動機自体を冷却するモー
タ冷却風路と駆動回路を冷却する回路冷却風路とを回転
軸方向に分離させて独立的に形成するとともに、これら
冷却風路を一端を集合させて集合部に送風ファンを設け
たため、全体としての大型化を招くことなく電動機と駆
動回路との双方を効率的に冷却でき、また、部品点数の
削減も図れるという効果が得られる。As described above, according to the cooling device for an electric motor of the present invention, the motor cooling air passage for cooling the electric motor itself and the circuit cooling air passage for cooling the drive circuit are separated in the rotation axis direction. Independently formed, these cooling air passages are gathered at one end and a blower fan is provided at the gathering portion, so both the electric motor and the drive circuit can be efficiently cooled without increasing the overall size, Further, an effect that the number of parts can be reduced can be obtained.
【図１】この発明の一実施例が適用された電動機の縦断
面図FIG. 1 is a vertical sectional view of an electric motor to which an embodiment of the present invention is applied.
【図２】同電動機の主要部品の側面図[Fig. 2] Side view of main parts of the electric motor
【図３】同主要部品の斜視図FIG. 3 is a perspective view of the main parts.
１１・・・ケース本体、 １１ａ・・・大径部（モータケース
に相当）、 １１ｂ・・・小径部（ホルダ部材に相当）、
１３・・・回転軸、１９・・・ロータ、 ２０・・・送風ファ
ン、 ２１・・・ステータ、 ２２・・・駆動回路、３０・・・
モータ冷却風路、 ３１・・・回路冷却風路。11 ... Case body, 11a ... Large diameter part (corresponding to motor case), 11b ... Small diameter part (corresponding to holder member),
13 ... Rotating shaft, 19 ... Rotor, 20 ... Blower fan, 21 ... Stator, 22 ... Drive circuit, 30 ...
Motor cooling air passage, 31 ... Circuit cooling air passage.
Claims (1)
配置し、これらロータおよびステータの少なくとも一方
に冷却風を導くモータ冷却風路をモータケースに形成す
るとともに、モータケースのロータ回転軸方向一側に駆
動回路が設けられたホルダ部材を組み付け、このホルダ
部材の駆動回路に冷却風を導く回路冷却風路を形成し、
この回路冷却風路と前記モータ冷却風路とを連通させ、
これら冷却風路の連通部にロータと一体的に回転して各
冷却風路に冷却風を生じさせるファンを配置したことを
特徴とする電動機の冷却装置。1. A rotor and a stator are arranged in a motor case, and a motor cooling air duct for guiding cooling air to at least one of the rotor and the stator is formed in the motor case, and one side of the motor case in the rotor rotation axis direction. Assembling a holder member provided with a drive circuit to, to form a circuit cooling air passage for guiding cooling air to the drive circuit of this holder member,
This circuit cooling air passage and the motor cooling air passage are communicated with each other,
A cooling device for an electric motor, wherein a fan that rotates integrally with a rotor to generate cooling air in each cooling air passage is disposed in a communication portion of these cooling air passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28707391A JP2882594B2 (en) | 1991-10-07 | 1991-10-07 | Motor cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28707391A JP2882594B2 (en) | 1991-10-07 | 1991-10-07 | Motor cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05103443A true JPH05103443A (en) | 1993-04-23 |
| JP2882594B2 JP2882594B2 (en) | 1999-04-12 |
Family
ID=17712708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28707391A Expired - Fee Related JP2882594B2 (en) | 1991-10-07 | 1991-10-07 | Motor cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2882594B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006528477A (en) * | 2003-06-17 | 2006-12-14 | ブラック アンド デッカー インコーポレーテッド | Generator having dual-path airflow cooling structure and method therefor |
| US20110169352A1 (en) * | 2010-01-14 | 2011-07-14 | Kabushiki Kaisha Yaskawa Denki | Motor and vehicle |
| JP2014068489A (en) * | 2012-09-26 | 2014-04-17 | Hitachi Koki Co Ltd | Brushless motor and electric tool |
| KR101481537B1 (en) * | 2013-06-26 | 2015-01-13 | 한국기계연구원 | Magnetic coupling having self-cooling function |
| JP2015095997A (en) * | 2013-11-13 | 2015-05-18 | 日本電産株式会社 | Motor |
| DE102014204390A1 (en) * | 2014-03-11 | 2015-09-17 | Continental Automotive Gmbh | Drive device for driving a vehicle, vehicle with a drive device |
| JP2019097238A (en) * | 2017-11-20 | 2019-06-20 | 株式会社荏原製作所 | Dynamo-electric motor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007318885A (en) | 2006-05-25 | 2007-12-06 | Mabuchi Motor Co Ltd | Brushless motor |
-
1991
- 1991-10-07 JP JP28707391A patent/JP2882594B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006528477A (en) * | 2003-06-17 | 2006-12-14 | ブラック アンド デッカー インコーポレーテッド | Generator having dual-path airflow cooling structure and method therefor |
| US20110169352A1 (en) * | 2010-01-14 | 2011-07-14 | Kabushiki Kaisha Yaskawa Denki | Motor and vehicle |
| US8614527B2 (en) * | 2010-01-14 | 2013-12-24 | Kabushiki Kaisha Yaskawa Denki | Motor and vehicle |
| JP2014068489A (en) * | 2012-09-26 | 2014-04-17 | Hitachi Koki Co Ltd | Brushless motor and electric tool |
| US9397535B2 (en) | 2012-09-26 | 2016-07-19 | Hitachi Koki Co., Ltd. | Brushless motor and electric-powered tool |
| KR101481537B1 (en) * | 2013-06-26 | 2015-01-13 | 한국기계연구원 | Magnetic coupling having self-cooling function |
| JP2015095997A (en) * | 2013-11-13 | 2015-05-18 | 日本電産株式会社 | Motor |
| CN104638834A (en) * | 2013-11-13 | 2015-05-20 | 日本电产株式会社 | Motor |
| US9564787B2 (en) | 2013-11-13 | 2017-02-07 | Nidec Corporation | Motor including housing structure with through holes |
| DE102014204390A1 (en) * | 2014-03-11 | 2015-09-17 | Continental Automotive Gmbh | Drive device for driving a vehicle, vehicle with a drive device |
| JP2019097238A (en) * | 2017-11-20 | 2019-06-20 | 株式会社荏原製作所 | Dynamo-electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2882594B2 (en) | 1999-04-12 |
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