JP3535025B2 - Fully enclosed cooling rotary electric machine - Google Patents
Fully enclosed cooling rotary electric machineInfo
- Publication number
- JP3535025B2 JP3535025B2 JP31676298A JP31676298A JP3535025B2 JP 3535025 B2 JP3535025 B2 JP 3535025B2 JP 31676298 A JP31676298 A JP 31676298A JP 31676298 A JP31676298 A JP 31676298A JP 3535025 B2 JP3535025 B2 JP 3535025B2
- Authority
- JP
- Japan
- Prior art keywords
- electric machine
- cooling
- fully
- stator
- rotating 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、全閉冷却型回転電
機に関するものである。
【０００２】
【従来の技術】従来提案されている全閉冷却型回転電機
では、単に回転電機の外部に冷却風を流すか、機内を循
環する空気を媒体として発熱部から冷却部まで熱を運
び、冷却部でフィン等を通して外部に熱を放出する構成
になっている。
【０００３】
【発明が解決しようとする課題】しかしながら、上記し
た従来の回転電機の冷却方法では、発熱体から放熱部ま
での熱抵抗が大きく、温度上昇を防ぎながら大量の熱を
放出することは難しい。つまり、従来の全閉冷却型回転
電機は、温度上昇が大きくなりがちであるといった問題
があった。
【０００４】回転電機を全閉型にすると、冷却風を機内
に導入する必要が無くなり、塵埃の侵入を防ぐことがで
き、メンテンスフリーで低騒音の回転電機が実現できる
が、一方で、回転電機内への冷却風に代わる新たな冷却
手段を考える必要がある。
【０００５】ところで、先行技術例として、ループ型細
管ヒートパイプを用いた全閉冷却型電動機〔登録２５７
２４４４号公報（実願平４−５２８３９号）〕がある。
【０００６】図８は従来の全閉冷却型電動機の断面図、
図９はその全閉冷却型電動機のループパイプの斜視図で
ある。
【０００７】主電動機の回転子１０２、固定子１０３に
発生した熱は軸１０１に装着された内蔵ファン１０５に
より、枠内ファン側より内気通風路１０６の風道入口１
０７ａ、通気管１０８、風道出口１０７ｂを経て主電動
機枠内反ファン側に循環し、冷却された内気は矢印で示
した経路を経て、回転子１０２，固定子１０３を冷却
し、内蔵ファン１０５側へと還流する。ループパイプ１
０９の受熱部１０９ａは内気通風路１０６の風道入口１
０７ａ内に配設され、放熱部１０９ｃは、主電動機枠１
０４の外部に内気通風路１０６ともに車両走行時の走行
風に露出されており、走行風は紙面に直角に流れるよう
に配置される。
【０００８】図９に示すように、受熱部１０９ａ（１０
９ａ１，１０９ａ２，１０９ａ３）と、他端の受熱部
（図示なし）と、放熱部１０９ｃ（１０９ｃ１，１０９
ｃ２，１０９ｃ３）とからなるループパイプを構成して
いる。ループパイプはアダプタ１１０により風道入口１
０７ａ、風道出口１０７ｂに取付けられる。
【０００９】しかしながら、上記した従来の方法では、
機内空気を中間媒体とした間接冷却であって全体での熱
抵抗が大きい。
【００１０】本発明は、この種の電動機に改良を加え
て、発熱体から外気までの経路の熱抵抗を小さくするこ
とができ、冷却性能が向上し、回転電機の温度上昇を低
減することができる全閉冷却型回転電機を提供すること
を目的とする。
【００１１】
【課題を解決するための手段】本発明は、上記目的を達
成するために、
〔１〕全閉冷却型回転電機において、固定子に配置さ
れ、外気に触れるフィンが形成されるループ式細管ヒー
トパイプ内蔵の薄板状冷却エレメントを具備し、このル
ープ式細管ヒートパイプ内蔵の薄板状冷却エレメントを
積層鉄心及びコイルエンド部分に挟むように配置するよ
うにしたものである。
【００１２】
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照しながら詳細に説明する。
【００１３】図１は本発明の第１実施例を示す全閉冷却
型回転電機の要部断面図、図２はその全閉冷却型回転電
機の固定子の冷却装置を示す断面図、図３はその固定子
の部分斜視図、図４はその固定子のコイルエンド部分の
斜視図、図５はその薄板状冷却エレメントを示す図であ
る。
【００１４】これらの図において、１は全閉冷却型回転
電機の回転軸、２はその回転軸に固定される回転子、３
はベアリング、１０は外部ケーシング、１１は固定子、
１２は固定子積層鉄心、１３は固定子コイル、１３Ａは
コイルエンド、１４は固定子積層鉄心に挟まれるループ
式細管ヒートパイプ内蔵の薄板状冷却エレメント、１５
はコイルエンド部分に挟まれるループ式細管ヒートパイ
プ内蔵の薄板状冷却エレメント、１６は内気、１７は外
気である。
【００１５】この全閉冷却型回転電機の断面を見ると、
図２に示すように、ある固定子積層鉄心１２の円周には
凹部を形成しておき、その凹部に薄板状冷却エレメント
１４の基部１４Ｂを装着して、放射状に複数枚を前後の
固定子積層鉄心（図示なし）で挟み込んで配置するよう
にしている。また、図３に示すように、薄板状冷却エレ
メント１４は前後の配置をずらすように配置することも
できる。
【００１６】また、図４に示すように、コイルエンド１
３Ａ間には薄板状冷却エレメント１５の基部を挟み込む
ようにし、そのコイルエンド１３Ａは突出したフィン１
５Ａを除いて樹脂で固めるようにしてもよい。
【００１７】そこで、 固定子コイル１３の発熱（鉄
心内）、固定子積層鉄心１２の発熱は固定子コイル１３
→固定子積層鉄心１２→薄板状冷却エレメント１４→外
気１７で放熱される。
【００１８】また、 固定子コイルエンド１３Ａの発
熱→固定子コイルエンド１３Ａ→薄板状冷却エレメント
１５→外気１７で放熱される。
【００１９】ここで、薄板状冷却エレメント１４，１５
について説明すると、図５に示すように、例えば、ルー
プ式細管ヒートパイプ１４−１，１５−１が薄板状の熱
伝導性材料（例えば、アルミニウム）１４−２，１５−
２に内蔵されるように構成されている。そのループ式細
管ヒートパイプ１４−１，１５−１内には、作動流体と
して、フロンＨＣＦＣ１４２ｂを内容積７０％封入した
ものを用いることができる（例えば、米国特許４９２１
０４１号、特開昭６３−３１８４９３号公報、特公平６
−９７１４７号公報参照）。
【００２０】このように、発熱体である固定子コイル１
３、固定子積層鉄心１２から薄板状冷却エレメント１
４，１５までは熱伝導により熱が伝えられるが、接触面
積が大きいため、熱抵抗は小さい。よって、薄板状冷却
エレメント１４，１５自身の熱抵抗は非常に小さい。そ
して、それがそのまま冷却フィン１４Ａ，１５Ａとな
り、ここでも空気との接触面積を大きくとることができ
るので、熱抵抗を小さくすることができる。
【００２１】よって、全体での熱抵抗は空気等を中間媒
体にする場合に比べて非常に小さくすることができる。
【００２２】次に、本発明の第２実施例について説明す
る。
【００２３】図６は本発明の第２実施例を示す全閉冷却
型回転電機の内部模式図、図７はその図６のＡ−Ａ′線
断面図である。
【００２４】これらの図において、２１は回転子、２２
は固定子積層鉄心、２３はドーナッ状薄円板からなる冷
却エレメントであり、図示しないが、図５に示すような
ループ式細管ヒートパイプがドーナッ状薄円板を形成す
る熱伝導性材料に内蔵されるように構成されている。
【００２５】また、回転子の冷却は、図示しないが、通
常用いられるように、回転子自らの回転により、ファン
が作動して、回転電機内の空気の循環により、回転子コ
イル→機内空気→冷却フィンの経路で放熱するように構
成することができる。
【００２６】なお、上記実施例では、薄板状冷却エレメ
ントとしたが、大型の回転電機においては、適宜厚みを
持たせることは可能であり、その意味で板状冷却エレメ
ントであってもよい。
【００２７】また、本発明は上記実施例に限定されるも
のではなく、本発明の趣旨に基づいて種々の変形が可能
であり、これらを本発明の範囲から排除するものではな
い。
【００２８】
【発明の効果】以上、詳細に説明したように、本発明に
よれば、以下のような効果を奏することができる。
【００２９】（Ａ）発熱体から外気に至るまでの経路の
熱抵抗を小さくすることができ、冷却性能が向上し、回
転電機の温度上昇を低減することができる。
【００３０】（Ｂ）塵埃の侵入を防ぐことができ、メン
テナンスフリーの全閉冷却型回転電機を実現することが
できる。
【００３１】（Ｃ）従来のファンを備えた全閉型回転電
機は、騒音を発生することになるが、本発明の全閉冷却
型回転電機は、ファンを要しないので、騒音を防止する
ことができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully-closed cooling rotary electric machine. 2. Description of the Related Art In a fully-closed cooling type rotary electric machine proposed in the past, cooling air is simply flown outside the rotary electric machine, or heat is transferred from a heat generating portion to a cooling portion by using air circulating in the device as a medium. In the cooling section, heat is released to the outside through fins and the like. [0003] However, in the above-mentioned conventional cooling method for a rotating electric machine, the thermal resistance from the heating element to the heat radiating portion is large, and it is difficult to release a large amount of heat while preventing the temperature from rising. difficult. In other words, the conventional fully-closed cooling type rotary electric machine has a problem that the temperature rise tends to be large. [0004] When the rotating electric machine is fully closed, there is no need to introduce cooling air into the machine, dust can be prevented from entering, and a maintenance-free and low-noise rotating electric machine can be realized. It is necessary to consider a new cooling method that replaces the cooling wind into the inside. By the way, as a prior art example, a fully-closed cooling type electric motor using a loop type thin tube heat pipe [Registration 257]
2444 (Japanese Utility Model Application No. 4-52839). FIG. 8 is a sectional view of a conventional fully-closed cooling motor.
FIG. 9 is a perspective view of a loop pipe of the fully closed cooling electric motor. [0007] The heat generated in the rotor 102 and the stator 103 of the main motor is supplied to the air passage inlet 1 of the inside air passage 106 from the fan side in the frame by the built-in fan 105 mounted on the shaft 101.
07a, the ventilation pipe 108, and the airway exit 107b, circulates to the fan side inside the main motor frame, and the cooled inside air cools the rotor 102 and the stator 103 through the path indicated by the arrow, and the built-in fan 105 Reflux to the side. Loop pipe 1
09 is a heat receiving portion 109a of the air passage entrance 1 of the inside air passage 106.
07a, and the heat radiating portion 109c is
Both the inside air passage 106 and the inside air passage 106 are exposed to the traveling wind when the vehicle is traveling, and the traveling wind is arranged so as to flow at a right angle to the paper surface. As shown in FIG. 9, the heat receiving portion 109a (10
9a1, 109a2, 109a3), a heat receiving portion (not shown) at the other end, and a heat radiating portion 109c (109c1, 109c).
c2, 109c3). The loop pipe is connected to the airway entrance 1 by the adapter 110.
07a, attached to the airway exit 107b. However, in the above-mentioned conventional method,
Indirect cooling using the air inside the machine as an intermediate medium and large thermal resistance as a whole. According to the present invention, by improving this type of motor, the thermal resistance of the path from the heating element to the outside air can be reduced, the cooling performance can be improved, and the temperature rise of the rotating electric machine can be reduced. An object of the present invention is to provide a fully-closed cooling type rotating electric machine that can be used. In order to achieve the above object, the present invention provides: [1] In a fully-closed cooling type rotating electric machine, a loop disposed on a stator and formed with fins that come into contact with outside air. Type capillary tube
Comprising a thin plate-shaped cooling element of the heat pipe built, the Le
Is obtained by the thin plate-shaped cooling element-loop type capillary tube heat pipe incorporated in to place so as to sandwich the laminated core and the coil end portion. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a main part of a fully-closed cooling type rotating electric machine showing a first embodiment of the present invention, FIG. 2 is a sectional view showing a cooling device of a stator of the fully-closed cooling type rotating electric machine, and FIG. FIG. 4 is a partial perspective view of the stator, FIG. 4 is a perspective view of a coil end portion of the stator, and FIG. 5 is a view showing the thin plate cooling element. In these figures, reference numeral 1 denotes a rotating shaft of a fully-closed cooling type rotary electric machine, 2 denotes a rotor fixed to the rotating shaft, 3
Is a bearing, 10 is an outer casing, 11 is a stator,
12 is a stator laminated core, 13 is a stator coil, 13A is a coil end, 14 is a thin plate cooling element with a built-in loop-type thin tube heat pipe sandwiched between the stator laminated cores, 15
Is a thin plate cooling element with a built-in loop-type thin tube heat pipe sandwiched between coil end portions, 16 is inside air, and 17 is outside air. Looking at the cross section of the fully-closed cooling type rotating electric machine,
As shown in FIG. 2, a recess is formed in the circumference of a certain stator laminated core 12, and the base 14 B of the thin plate cooling element 14 is mounted in the recess, and a plurality of stators are radially inserted into the front and rear stators. It is arranged to be sandwiched between laminated iron cores (not shown). Further, as shown in FIG. 3, the thin plate cooling elements 14 can be arranged so that the front and rear arrangements are shifted. Further, as shown in FIG.
3A, the base of the thin cooling element 15 is sandwiched between the fins 1A.
You may make it solidify with resin except 5A. Therefore, the heat generated by the stator coil 13 (within the iron core) and the heat generated by the stator laminated core 12 are
→ Stator laminated core 12 → Thin plate cooling element 14 → Heat is radiated by outside air 17. Heat is radiated from the stator coil end 13A → stator coil end 13A → thin plate cooling element 15 → outside air 17. Here, the sheet-like cooling elements 14, 15
For example, as shown in FIG. 5, for example, loop-type thin tube heat pipes 14-1 and 15-1 are formed of a thin plate-like heat conductive material (for example, aluminum) 14-2 and 15-.
2. In the loop-type thin tube heat pipes 14-1 and 15-1, a fluid filled with 70% of Freon HCFC142b can be used as a working fluid (for example, US Pat.
041, JP-A-63-318493, JP-B-6
-97147 gazette). As described above, the stator coil 1 which is a heating element
3. From the laminated stator core 12 to the thin cooling element 1
Heat is transmitted by heat conduction to 4 and 15, but the thermal resistance is small due to the large contact area. Therefore, the heat resistance of the thin plate cooling elements 14 and 15 themselves is very small. Then, the cooling fins 14A and 15A are used as they are, and the contact area with the air can be increased here, so that the thermal resistance can be reduced. Therefore, the total thermal resistance can be made very small as compared with the case where air or the like is used as the intermediate medium. Next, a second embodiment of the present invention will be described. FIG. 6 is a schematic view showing the internal configuration of a fully-closed cooling type rotary electric machine according to a second embodiment of the present invention, and FIG. 7 is a sectional view taken along the line AA 'of FIG. In these figures, 21 is a rotor, 22
Is a stator laminated iron core, and 23 is a cooling element made of a donut-shaped thin disk. Although not shown, a loop-type thin tube heat pipe as shown in FIG. 5 is built in a heat conductive material forming the donut-shaped thin disk. It is configured to be. The cooling of the rotor is not shown, but as is usually used, the fan operates by the rotation of the rotor itself, and the circulation of air in the rotating electric machine causes the rotation of the rotor coil → air inside the machine → It can be configured to dissipate heat in the cooling fin path. In the above embodiment, a thin plate cooling element is used. However, a large rotating electric machine can have an appropriate thickness, and in that sense, a plate cooling element may be used. Further, the present invention is not limited to the above-described embodiment, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention. As described above, according to the present invention, the following effects can be obtained. (A) The thermal resistance of the path from the heating element to the outside air can be reduced, the cooling performance can be improved, and the temperature rise of the rotating electric machine can be reduced. (B) Intrusion of dust can be prevented, and a maintenance-free fully-closed cooling type rotating electric machine can be realized. (C) A fully-closed rotary electric machine equipped with a conventional fan generates noise, but the fully-closed cooled rotary electric machine of the present invention does not require a fan. Can be.
【図面の簡単な説明】
【図１】本発明の第１実施例を示す全閉冷却型回転電機
の要部断面図である。
【図２】本発明の第１実施例を示す全閉冷却型回転電機
の固定子の冷却装置を示す断面図である。
【図３】本発明の第１実施例を示す全閉冷却型回転電機
の固定子の部分斜視図である。
【図４】本発明の第１実施例を示す全閉冷却型回転電機
の固定子のコイルエンド部分の斜視図である。
【図５】本発明の第１実施例を示す全閉冷却型回転電機
の固定子の薄板状冷却エレメントを示す図である。
【図６】本発明の第２実施例を示す全閉冷却型回転電機
の内部模式図である。
【図７】図６のＡ−Ａ′線断面図である。
【図８】従来の全閉冷却型電動機の断面図である。
【図９】従来の全閉冷却型電動機のループパイプの斜視
図である。
【符号の説明】
１ 回転軸
２ 回転子
３ ベアリング
１０ 外部ケーシング
１１ 固定子
１２，２２ 固定子積層鉄心
１３ 固定子コイル
１３Ａ コイルエンド
１４，１５ ループ式細管ヒートパイプ内蔵の薄板状
冷却エレメント
１４Ａ，１５Ａ 冷却フィン１４Ｂ 基部
１６ 内気
１７ 外気
２１ 回転子
２３ ドーナッ状薄円板からなる冷却エレメントBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a main part of a fully-closed cooling type rotating electric machine according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a cooling device for the stator of the fully-closed cooling type rotating electric machine according to the first embodiment of the present invention. FIG. 3 is a partial perspective view of a stator of the fully-closed cooling type rotating electric machine according to the first embodiment of the present invention. FIG. 4 is a perspective view of a coil end portion of a stator of the fully-closed cooling type rotating electric machine according to the first embodiment of the present invention. FIG. 5 is a view showing a thin cooling element of a stator of the fully-closed cooling type rotating electric machine according to the first embodiment of the present invention. FIG. 6 is an internal schematic diagram of a fully-closed-cooling type rotating electric machine showing a second embodiment of the present invention. FIG. 7 is a sectional view taken along line AA ′ of FIG. 6; FIG. 8 is a sectional view of a conventional fully-closed cooling type electric motor. FIG. 9 is a perspective view of a loop pipe of a conventional fully closed cooling electric motor. [Description of Signs] 1 Rotating shaft 2 Rotor 3 Bearing 10 Outer casing 11 Stator 12, 22 Stator laminated iron core 13 Stator coil 13A Coil end 14, 15 Thin plate-shaped cooling element 14A, 15A with built-in loop-type thin tube heat pipe Cooling fin 14B base 16 Inside air 17 Outside air 21 Rotor 23 Cooling element composed of a thin disk
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−138948（ＪＰ，Ａ) 特開 昭57−62754（ＪＰ，Ａ) 特開 昭62−25841（ＪＰ，Ａ) 実開 昭56−7470（ＪＰ，Ｕ) 実開 昭54−84008（ＪＰ，Ｕ) 特公 昭36−16563（ＪＰ，Ｂ１) 米国特許3010038（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 9/22,3/24 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-138948 (JP, A) JP-A-57-62754 (JP, A) JP-A-62-25841 (JP, A) 7470 (JP, U) JP-A 54-84008 (JP, U) JP-B 36-16563 (JP, B1) US Patent 3010038 (US, A) (58) Fields investigated (Int. Cl. 7 , DB) Name) H02K 9 / 22,3 / 24
Claims (1)
が形成されるループ式細管ヒートパイプ内蔵の薄板状冷
却エレメントを具備し、該ループ式細管ヒートパイプ内
蔵の薄板状冷却エレメントを積層鉄心及びコイルエンド
部分に挟むように配置することを特徴とする全閉冷却型
回転電機。(57) is disposed to the Claims 1] a stator, comprising a thin plate-shaped cooling element of the loop capillary tube heat pipe internal fins touching the outside air is formed, the loop capillary tube heat pipe Inside
Laminated core and the coil end of the thin plate-shaped cooling element storehouse
A fully-closed cooling type rotating electric machine characterized by being arranged so as to be sandwiched between portions .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31676298A JP3535025B2 (en) | 1998-11-09 | 1998-11-09 | Fully enclosed cooling rotary electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31676298A JP3535025B2 (en) | 1998-11-09 | 1998-11-09 | Fully enclosed cooling rotary electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000152563A JP2000152563A (en) | 2000-05-30 |
| JP3535025B2 true JP3535025B2 (en) | 2004-06-07 |
Family
ID=18080651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31676298A Expired - Fee Related JP3535025B2 (en) | 1998-11-09 | 1998-11-09 | Fully enclosed cooling rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3535025B2 (en) |
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| CN103532309A (en) * | 2013-10-17 | 2014-01-22 | 浙江工商大学 | Intelligent heat-superconducting motor cooler |
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-
1998
- 1998-11-09 JP JP31676298A patent/JP3535025B2/en not_active Expired - Fee Related
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| CN103532309A (en) * | 2013-10-17 | 2014-01-22 | 浙江工商大学 | Intelligent heat-superconducting motor cooler |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2000152563A (en) | 2000-05-30 |
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