JP2634346B2 - AC generator for vehicles - Google Patents
AC generator for vehiclesInfo
- Publication number
- JP2634346B2 JP2634346B2 JP3325182A JP32518291A JP2634346B2 JP 2634346 B2 JP2634346 B2 JP 2634346B2 JP 3325182 A JP3325182 A JP 3325182A JP 32518291 A JP32518291 A JP 32518291A JP 2634346 B2 JP2634346 B2 JP 2634346B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- cooling air
- valley
- pole teeth
- core
- 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 - Lifetime
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
- Synchronous Machinery (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ブラケット支持の突
極回転形回転子の車両用交流発電機に関し、特に磁極鉄
心を軸方向に通る冷却風の騒音の抑制にかかわる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC generator for a vehicle having a bracket-supported salient-pole rotating rotor, and more particularly, to the suppression of cooling wind noise passing axially through a magnetic pole core.
【０００２】[0002]
【従来の技術】図４は従来の車両用交流発電機の縦断面
図である。図において、１は固定子で、固定子鉄心２
と、固定子コイル３とからなる。４は回転子で、次のよ
うに構成されている。５及び６は異極性の磁極鉄心で、
双方の磁極歯部５ａ及び６ａが円周方向に交互に出され
ている。７は双方の磁極鉄心間に保持された励磁コイ
ル、８は磁極鉄心５、６を固着した回転軸、９は回転軸
８に絶縁スリーブを介し固定された１対のスリップリン
グ、１０及び１１は磁極鉄心５及び６に固定されたファ
ンである。２２はコイルボビンである。2. Description of the Related Art FIG. 4 is a longitudinal sectional view of a conventional automotive alternator. In the figure, 1 is a stator, and a stator core 2
And a stator coil 3. Reference numeral 4 denotes a rotor, which is configured as follows. 5 and 6 are magnetic pole cores of different polarities,
Both magnetic pole teeth 5a and 6a are alternately projected in the circumferential direction. Reference numeral 7 denotes an excitation coil held between the two pole cores, 8 denotes a rotating shaft to which the pole cores 5 and 6 are fixed, 9 denotes a pair of slip rings fixed to the rotating shaft 8 via an insulating sleeve, and 10 and 11 denote a pair of slip rings. The fan is fixed to the magnetic pole cores 5 and 6. 22 is a coil bobbin.
【０００３】次に、１２及び１３は前ブラケット及び後
ブラケットで、締付けボルト１４により固定子鉄心２を
結合している。前ブラケット１２には通風のため、端部
に複数の吸気孔１２ａと、外周部に複数の排気孔１２ｂ
とが設けられている。また、後ブラケット１３には通風
のため、端部に複数の吸気孔１３ａと、外周部に複数の
排気孔１３ｂとが設けられている。回転軸８は軸受１５
及び１６を介し、前ブラケット１２及び後ブラケット１
３に支持されている。１７は回転軸８に固定されたプー
リで、機関の回転がベルトを介し伝えられ、回転子４を
回転させる。Next, reference numerals 12 and 13 denote a front bracket and a rear bracket, respectively, to which the stator core 2 is connected by tightening bolts 14. For ventilation, the front bracket 12 has a plurality of intake holes 12a at the end and a plurality of exhaust holes 12b at the outer periphery.
Are provided. The rear bracket 13 is provided with a plurality of intake holes 13a at an end portion and a plurality of exhaust holes 13b at an outer peripheral portion for ventilation. The rotating shaft 8 is a bearing 15
And 16, the front bracket 12 and the rear bracket 1
3 supported. Reference numeral 17 denotes a pulley fixed to the rotating shaft 8, and the rotation of the engine is transmitted via a belt to rotate the rotor 4.
【０００４】１８は固定子コイル３に誘導された交流電
圧を直流電圧に整流して出力する整流器、１９は整流器
出力電圧を検出し、励磁電流を制御し端子電圧を所定値
に調整する電圧調整器である。２０はブラシ保持器で、
保持したブラシ２１をスリップリング９に圧接させ励磁
電流を通じる。A rectifier 18 rectifies an AC voltage induced in the stator coil 3 to a DC voltage and outputs the rectified voltage. 19 detects a rectifier output voltage, controls an exciting current, and adjusts a terminal voltage to a predetermined value. It is a vessel. 20 is a brush holder,
The held brush 21 is pressed against the slip ring 9 to pass an exciting current.
【０００５】上記交流発電機において、回転子４が回転
されると、固定子コイル３に交流電圧が誘導され電力を
供給し発熱する。ファン１０、１１の回転による通風
で、固定子１部、回転子４部を冷却する。In the AC generator, when the rotor 4 is rotated, an AC voltage is induced in the stator coil 3 to supply power and generate heat. The ventilation of the fans 10 and 11 cools one part of the stator and four parts of the rotor.
【０００６】ファン１０の回転による冷却風は、矢印Ａ
のように、前ブラケット１２の吸気孔１２ａから吸入さ
れ、固定子１部を冷却し排気孔１２ｂから排出される。
ファン１１の回転による冷却風は、矢印Ｂのように、後
ブラケット１３の吸気孔１３ａから吸入され、整流器１
８、電圧調整器１９、集電装置部、固定子１部を冷却
し、排気孔１３ｂから排出される。また、ファン１０よ
りファン１１の方がファン作用が大きいので、ファン１
０による冷却風の一部は、矢印Ｃのように、磁極鉄心５
の磁極歯部５ａの根元部の谷部５ｂを経て磁極歯部５ａ
と６ａ間を通り、磁極鉄心６の磁極歯部６ａの根元部の
谷部６ｂを経て、ファン１１に吸引されて排出され、回
転子４部を冷却する。The cooling air generated by the rotation of the fan 10 is indicated by an arrow A
As described above, the air is sucked through the intake hole 12a of the front bracket 12, cooled down the stator 1 and discharged through the exhaust hole 12b.
Cooling air generated by the rotation of the fan 11 is sucked from the intake hole 13a of the rear bracket 13 as shown by an arrow B,
8. The voltage regulator 19, the current collector, and the stator 1 are cooled and discharged from the exhaust holes 13b. Also, since the fan 11 has a greater fan action than the fan 10, the fan 1
0, a part of the cooling air is
Of the magnetic pole tooth portion 5a through the valley portion 5b at the base of the magnetic pole tooth portion 5a
And 6a, the magnetic flux is sucked and discharged by the fan 11 through the valley 6b at the root of the magnetic pole teeth 6a of the magnetic pole core 6, and the rotor 4 is cooled.
【０００７】上記回転子４部の冷却風の流れを、図５に
示す。磁極鉄心５の谷部５ｂの両面は軸方向に平行であ
り、冷却風を受ける側の隅部で、乱流Ｄが生じる。ま
た、磁極鉄心６の谷部６ｃの両面は軸方向に平行であ
り、冷却風を誘引する側の隅部で、乱流Ｅが生じる。こ
のため、回転方向による磁極歯部５と６間を軸方向に斜
めに流通する冷却風の通風損失が大きく騒音が大きくな
っていた。FIG. 5 shows the flow of the cooling air in the rotor 4 part. Both surfaces of the valley portion 5b of the magnetic pole core 5 are parallel to the axial direction, and a turbulent flow D occurs at the corner on the side receiving the cooling air. Further, both surfaces of the valley portion 6c of the pole iron core 6 are parallel to the axial direction, and a turbulent flow E is generated at a corner on the side where cooling air is drawn. For this reason, the cooling air flowing obliquely in the axial direction between the magnetic pole teeth 5 and 6 in the rotation direction has a large ventilation loss and a large noise.
【０００８】上記磁極鉄心５の谷部５ｂの形状は、図６
（Ａ）及び（Ｂ）に正面図及び断面図で示すようになっ
ている。谷部５ｂの両面は軸方向に平行に形成されてい
る。なお、磁極鉄心６の形状は磁極鉄心５と同一であ
り、反対側に向きを変えて組合わされる。The shape of the valley 5b of the magnetic pole core 5 is shown in FIG.
(A) and (B) show a front view and a sectional view. Both surfaces of the valley 5b are formed parallel to the axial direction. The shape of the magnetic pole core 6 is the same as that of the magnetic pole core 5, and is combined by changing the direction to the opposite side.
【０００９】[0009]
【発明が解決しようとする課題】上記のような従来の車
両用交流発電機では、磁極鉄心５、６の磁極歯部５ａ、
６ａ間を流通する冷却風が谷部５ｂ、６ｂの隅部で通風
損失が大きく、風騒音が大きいという問題点があった。In the above-described conventional alternator for a vehicle, the magnetic pole teeth 5a of the magnetic pole cores 5 and 6 are provided.
There is a problem in that the cooling air flowing between 6a has large ventilation loss at the corners of the valleys 5b and 6b, and the wind noise is large.
【００１０】この発明は、このような問題点を解決する
ためになされたもので、磁極鉄心の磁極歯部間を流通す
る冷却風の谷部での通風損失を小さくし、風騒音を低下
することを目的としている。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and reduces a ventilation loss in a valley of cooling air flowing between magnetic pole teeth of a magnetic pole core, thereby reducing wind noise. It is intended to be.
【００１１】[0011]
【課題を解決するための手段】この発明にかかる車両用
交流発電機は、冷却風の流入側の磁極鉄心の谷部の、風
を受ける側の面をその側の磁極歯部の側面に沿った傾斜
面にし、冷却風の流出側の磁極鉄心の谷部の、風を誘引
する側の面をその側の磁極歯部の側面に沿った傾斜面に
したものである。In a vehicle alternator according to the present invention, the surface of the valley portion of the magnetic pole core on the cooling air inflow side on the side receiving the wind is arranged along the side surface of the magnetic pole tooth portion on the side. The valley of the magnetic pole core on the outflow side of the cooling wind has a slope on the side on which the wind is induced, along the side surface of the pole teeth on that side.
【００１２】[0012]
【作用】この発明においては、磁極鉄心の磁極歯部間を
流通する冷却風の、谷部での乱流の発生が少なくなり通
風損失を小さくし、風騒音が低下される。また、磁極鉄
心の断面積を大きくとれるので、磁気特性の向上が図れ
る。In the present invention, the generation of turbulence in the valleys of the cooling air flowing between the magnetic pole teeth of the magnetic pole core is reduced, the ventilation loss is reduced, and the wind noise is reduced. In addition, since the sectional area of the magnetic pole core can be increased, the magnetic characteristics can be improved.
【００１３】[0013]
【実施例】実施例１．図１はこの発明による車両用交流
発電機の縦断面図であり、１〜３、７〜２２、１２ａ、
１２ｂ、１３ａ、１３ｂは図４と同様である。回転子３
４の異極性の磁極鉄心３５及び３６から、磁極歯部３５
ａ及び３６ａが円周方向に交互に出されている。磁極歯
部３５ａの根元の谷部３５ｂの両面のうち、冷却風を受
ける側（回転方向に対し後方側）の面は、その側の磁極
歯部３５ａの側面に沿った傾斜面にし、磁極歯部３５
ａ、３６ａ間を通る冷却風が谷部３５ｂで円滑に流れる
ようにしている。磁極歯部３６ａの根元の谷部３６ｂの
両面のうち、冷却風を誘引する側の面（回転方向に対し
前方側）の面は、その側の磁極歯部３６ａの側面に沿っ
た傾斜面にし、磁極歯部３５ａ、３６ａ間を通った冷却
風が谷部３６ｂで円滑に流れるようにしている。[Embodiment 1] FIG. 1 is a vertical cross-sectional view of a vehicle alternator according to the present invention.
12b, 13a and 13b are the same as in FIG. Rotor 3
4 from the magnetic pole cores 35 and 36 having different polarities,
a and 36a are alternately provided in the circumferential direction. Of the two surfaces of the root valley 35b at the root of the magnetic pole teeth 35a, the surface on the side receiving the cooling air (the rear side with respect to the rotation direction) is formed as an inclined surface along the side surface of the magnetic pole teeth 35a on that side. Part 35
The cooling air passing between the a and the 36a flows smoothly in the valley 35b. Of the two surfaces of the valley portion 36b at the root of the magnetic pole tooth portion 36a, the surface on the side that attracts the cooling air (the front side with respect to the rotation direction) is an inclined surface along the side surface of the magnetic pole tooth portion 36a on that side. The cooling air passing between the magnetic pole teeth 35a and 36a smoothly flows in the valley 36b.
【００１４】上記回転子３４部の冷却風の流れを、図２
に示す。磁極鉄心３５の谷部３５ｂの冷却風を受ける側
の面は、磁極歯部３５ａの側面に沿った傾斜面にしてお
り、隅部での乱流が少なくなり円滑に流れる。また、磁
極鉄心３６の谷部３６ｂの冷却風を誘引する側の面は、
磁極歯部３６ａの側面に沿った傾斜面にしており、隅部
での乱流が少なくなり円滑に流れる。更に、これら傾斜
面は、それぞれ磁極歯部３５ａ，３６ａの側面に沿って
延設されているので、磁極鉄心３５，３６の磁路断面積
が従来より大きくとれ、磁気特性が向上する。The flow of the cooling air at the rotor 34 is shown in FIG.
Shown in The surface of the valley portion 35b of the magnetic pole core 35 on the side receiving the cooling air is an inclined surface along the side surface of the magnetic pole tooth portion 35a. Also, the surface of the valley portion 36b of the magnetic pole core 36 on which the cooling air is drawn is:
The inclined surface is formed along the side surface of the magnetic pole tooth portion 36a, and the turbulence at the corners is reduced, so that the gas flows smoothly. Further, since these inclined surfaces extend along the side surfaces of the magnetic pole teeth 35a, 36a, the magnetic path cross-sectional area of the magnetic pole cores 35, 36 can be made larger than before, and the magnetic characteristics are improved.
【００１５】上記磁極鉄心３５の谷部３５ｂの形状は、
図３（Ａ）及び（Ｂ）に正面図及び断面図で示すように
なっている。谷部３５ｂの冷却風を受ける側の面は、風
を円滑に導く傾斜面にされている。なお、磁極鉄心３６
の形状は磁極鉄心３５と同一であり、反対側に向きを変
えて組合わされる。The shape of the valley 35b of the magnetic pole core 35 is as follows.
FIGS. 3A and 3B are front and sectional views. The surface of the valley portion 35b on the side that receives the cooling wind is an inclined surface that guides the wind smoothly. The magnetic core 36
Has the same shape as the magnetic pole core 35, and is combined by changing its direction to the opposite side.
【００１６】[0016]
【発明の効果】以上のように、この発明によれば、回転
子の冷却風を流入する側の磁極鉄心の谷部の、風を受け
る側の面をその側の磁極歯部の側面に沿った傾斜面に
し、冷却風を流出する側の磁極鉄心の谷部の、風を誘引
する側の面をその側の磁極歯部の側面に添った傾斜面に
したので、磁極歯部間を流通する冷却風が、磁極鉄心の
谷部で円滑に流れ、通風損失が小さくなり、風騒音が低
下される。また、磁極鉄心の断面積を大きくとれるの
で、磁気特性の向上が図れる。As described above, according to the present invention, the surface of the valley portion of the pole iron core on the side where the cooling air flows into the rotor, on the side receiving the wind, is arranged along the side surface of the pole tooth portion on that side. The valley of the magnetic pole core on the side from which the cooling air flows out, and the surface on the side where the wind is induced is inclined along the side surface of the magnetic pole teeth on that side, so that it flows between the magnetic pole teeth. The flowing cooling air flows smoothly in the valleys of the pole iron core, so that ventilation loss is reduced and wind noise is reduced. In addition, since the sectional area of the magnetic pole core can be increased, the magnetic characteristics can be improved.
【図１】この発明による車両用交流発電機の一実施例の
縦断面図である。FIG. 1 is a longitudinal sectional view of an embodiment of an automotive alternator according to the present invention.
【図２】図１の回転子の側面図である。FIG. 2 is a side view of the rotor of FIG. 1;
【図３】（Ａ）は図２の前側の磁極鉄心の正面図で、
（Ｂ）は（Ａ）のＢ−Ｂ線における断面図である。FIG. 3A is a front view of a magnetic pole iron core on the front side in FIG. 2;
(B) is a sectional view taken along line BB of (A).
【図４】従来の車両用交流発電機の縦断面図である。FIG. 4 is a longitudinal sectional view of a conventional vehicle alternator.
【図５】図４の回転子の側面図である。FIG. 5 is a side view of the rotor of FIG. 4;
【図６】（Ａ）は図５の前側の磁極鉄心の正面図で、
（Ｂ）は（Ａ）のＢ−Ｂ線における断面図である。FIG. 6A is a front view of a magnetic pole core on the front side in FIG. 5;
(B) is a sectional view taken along line BB of (A).
１ 固定子 ７ 励磁コイル ８ 回転軸 10、11 ファン 12 前ブラケット 12a 吸入口 12b 排出口 13 後ブラケット 13a 吸気孔 13b 排気孔 34 回転子 35、36 磁極鉄心 35a、36a 磁極歯部 35b、36b 谷部 DESCRIPTION OF SYMBOLS 1 Stator 7 Excitation coil 8 Rotation axis 10 and 11 Fan 12 Front bracket 12a Inlet 12b Exhaust 13 Rear bracket 13a Inlet 13b Exhaust 34 Rotor 35, 36 Magnetic pole core 35a, 36a Magnetic pole teeth 35b, 36b Valley
Claims (1)
記ブラケットに軸受を介し支持された回転軸に固定さ
れ、双方から軸方向に出された磁極歯部が円周方向に交
互に配され、励磁コイルを保持し軸方向に合わされた異
極性の１対の磁極鉄心を有する回転子と、上記各磁極鉄
心の外端に取付けられた１対のファンを備え、上記ブラ
ケットには吸気口と排気口が設けられ、上記ファンによ
り機内を通風冷却し、かつ、上記各磁極歯部間を軸方向
に冷却風が流通するようにした車両用交流発電機におい
て、 上記各磁極鉄心の各磁極歯部の根元間には谷部が形成さ
れてあり、冷却風の流入側の磁極鉄心の谷部の、風を受
ける側の面をその側の磁極歯部の側面に沿う傾斜面に
し、冷却風の流出側の磁極鉄心の谷部の、風を誘引する
側の面を、その側の磁極歯部の側面に沿う傾斜面にした
ことを特徴とする車両用交流発電機。1. A a mounting et a stator bracket, the upper
Is fixed to the supported rotary shaft via a bearing Chivu racket, magnetic pole teeth issued axially from both arranged alternately in the circumferential direction, and holds the exciting coil opposite polarity of which is fitted in the axial direction a rotor having a pair of magnetic pole cores, comprising a pair of fans mounted on the outer end of the respective magnetic pole cores, the upper Chivu La <br/> packet exhaust port provided with an intake port, said In an automotive alternator in which the inside of the machine is cooled by ventilation and cooling air flows in the axial direction between the magnetic pole teeth, a valley is formed between roots of the magnetic pole teeth of the magnetic pole cores. The valley of the magnetic pole core on the inflow side of the cooling air is formed with an inclined surface along the side of the magnetic pole teeth on that side, and the magnetic pole core on the outflow side of the cooling air is formed. The feature is that the surface of the valley on the side that attracts the wind is inclined along the side surface of the magnetic pole teeth on that side. That AC generator for a vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3325182A JP2634346B2 (en) | 1991-11-12 | 1991-11-12 | AC generator for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3325182A JP2634346B2 (en) | 1991-11-12 | 1991-11-12 | AC generator for vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05137281A JPH05137281A (en) | 1993-06-01 |
| JP2634346B2 true JP2634346B2 (en) | 1997-07-23 |
Family
ID=18173926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3325182A Expired - Lifetime JP2634346B2 (en) | 1991-11-12 | 1991-11-12 | AC generator for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2634346B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6125344Y2 (en) * | 1978-12-24 | 1986-07-30 |
-
1991
- 1991-11-12 JP JP3325182A patent/JP2634346B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05137281A (en) | 1993-06-01 |
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