JPH0591702A - Ac power generator - Google Patents
Ac power generatorInfo
- Publication number
- JPH0591702A JPH0591702A JP3245791A JP24579191A JPH0591702A JP H0591702 A JPH0591702 A JP H0591702A JP 3245791 A JP3245791 A JP 3245791A JP 24579191 A JP24579191 A JP 24579191A JP H0591702 A JPH0591702 A JP H0591702A
- Authority
- JP
- Japan
- Prior art keywords
- claw
- magnetic pole
- center line
- pole piece
- slot
- 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
- 238000004804 winding Methods 0.000 claims description 11
- 238000010273 cold forging Methods 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000004513 sizing Methods 0.000 abstract description 4
- 230000004907 flux Effects 0.000 description 13
- 230000005284 excitation Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010409 ironing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
- H02K1/243—Rotor cores with salient poles ; Variable reluctance rotors of the claw-pole type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば複数の爪状磁極
片で励磁巻線を保持する回転子を具備した交流発電機に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC generator having a rotor that holds an excitation winding with a plurality of claw-shaped magnetic pole pieces.
【０００２】[0002]
【従来の技術】従来より、騒音となる磁気音の発生が、
負荷時の磁束波形の歪による第３次高調波に大きく影響
されていることに着眼し、負荷時の磁束波形を正弦波に
近くなるように、磁束歪を持たせるために爪状磁極片の
形状を予め中心線に対して非対称となるように不等辺台
形状に冷鍛成形してなる回転子を備えた交流発電機（特
公昭６１−１１０６６号公報）が知られている。2. Description of the Related Art Conventionally, the generation of magnetic noise, which is a noise,
Paying attention to the fact that it is greatly affected by the third harmonic due to the distortion of the magnetic flux waveform under load, the claw-shaped pole piece of the claw-shaped magnetic pole piece is added so that the magnetic flux waveform under load is close to a sine wave. An AC generator (Japanese Examined Patent Publication No. 61-11066) having a rotor formed by cold forging into an isosceles trapezoidal shape so as to be asymmetric with respect to the center line in advance is known.
【０００３】[0003]
【発明が解決しようとする課題】ところが、従来の交流
発電機においては、爪状磁極片の形状が中心線に対して
非対称であるため、冷鍛成形する際に回転方向の前縁側
と後縁側とで成形圧のアンバランスが大きく、爪状磁極
片の形状が不揃いとなってしまい、爪状磁極片の形状精
度が確保できなかった。本発明は、中心線に対して非対
称の爪状磁極片の形状精度を確保した交流発電機の提供
を目的とする。However, in the conventional AC generator, since the shape of the claw-shaped magnetic pole pieces is asymmetrical with respect to the center line, the leading edge side and the trailing edge side in the rotating direction are subjected to cold forging. As a result, the imbalance of the molding pressure was large, and the shapes of the claw-shaped magnetic pole pieces became uneven, and the shape accuracy of the claw-shaped magnetic pole pieces could not be ensured. An object of the present invention is to provide an AC generator that secures the shape accuracy of the claw-shaped magnetic pole pieces that are asymmetric with respect to the center line.
【０００４】[0004]
【課題を解決するための手段】本発明は、巻線を収納す
る複数のスロットを有する固定子と、この固定子に対向
して配置され、互いに噛み合う複数の爪状磁極片を有す
る回転子とを備えた交流発電機において、前記複数の爪
状磁極片は、回転方向の前縁側となる前記固定子との対
向面に、前記スロットの中心線に対して第１スキュー角
度の面取りが施された第１面取り部、および回転方向の
後縁側となる前記固定子との対向面に、前記スロットの
中心線に対して前記第１スキュー角度より大きい第２ス
キュー角度の面取りが施された第２面取り部を有する技
術手段を採用した。According to the present invention, there is provided a stator having a plurality of slots for accommodating windings, and a rotor having a plurality of claw-shaped magnetic pole pieces arranged to face each other and mesh with each other. In the alternator including the above, the plurality of claw-shaped magnetic pole pieces are chamfered at a first skew angle with respect to the center line of the slot on a surface facing the stator, which is a front edge side in the rotation direction. And a second chamfer having a second skew angle larger than the first skew angle with respect to the center line of the slot on the first chamfered portion and the surface facing the stator, which is on the trailing edge side in the rotation direction. The technical means with chamfer was adopted.
【０００５】[0005]
【作用】本発明は、回転方向の前縁側となる固定子との
対向面に第１面取り部を形成し、回転方向の後縁側とな
る固定子との対向面に第２面取り部を形成しており、さ
らに、第１面取り部にスロットの中心線に対して第１ス
キュー角度で面取りを施し、第２面取り部にスロットの
中心線に対して第１スキュー角度より大きい第２スキュ
ー角度で面取りを施しているので、複数の爪状磁極片は
回転方向の前縁側で磁束が急増し、回転方向の後縁側で
磁束が徐減することとなり、磁束波形が正弦波に近くな
るように磁束歪を持つため磁気音が低下する。また、複
数の爪状磁極片が中心線に対して非対称の面取りを施し
ているので、中心線に対して非対称の複数の爪状磁極片
の形状精度が実装可能な範囲内に容易に確保される。According to the present invention, the first chamfered portion is formed on the surface facing the stator on the leading edge side in the rotation direction, and the second chamfered portion is formed on the surface facing the stator on the trailing edge side in the rotation direction. Further, the first chamfer is chamfered at a first skew angle with respect to the center line of the slot, and the second chamfer is chamfered with a second skew angle larger than the first skew angle with respect to the center line of the slot. As a result, the multiple claw-shaped magnetic pole pieces have a sharp increase in magnetic flux on the leading edge side in the rotating direction and a gradual decrease in magnetic flux on the trailing edge side in the rotating direction, so that the magnetic flux waveform is close to a sine wave. The magnetic sound is reduced because it has. Moreover, since the plurality of claw-shaped magnetic pole pieces are chamfered asymmetrically with respect to the center line, the shape accuracy of the plurality of claw-shaped magnetic pole pieces asymmetrical with respect to the center line can be easily ensured within a mountable range. It
【０００６】[0006]
【実施例】本発明の交流発電機を図１ないし図５に示す
一実施例に基づき説明する。図１および図２は回転子の
爪状磁極片を示した図で、図３および図４は固定子と回
転子とを示した図である。交流発電機１は、自動車に搭
載され、電機子を構成する固定子２、および界磁を構成
する回転子３を備える。固定子２は、多数のけい素鋼板
を積層した円環状の電機子鉄心４、およびこの電機子鉄
心４を保持するヨーク（図示せず）等から構成されてい
る。電機子鉄心４は、全内周に亘って複数の突条（歯）
５が形成され、これらの突条５間には、三相電機子巻線
６が収納される複数のスロット７が形成されている。な
お、複数のスロット７は、所定のスロットピッチで形成
されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An AC generator of the present invention will be described based on an embodiment shown in FIGS. 1 and 2 are views showing a claw-shaped magnetic pole piece of a rotor, and FIGS. 3 and 4 are views showing a stator and a rotor. The AC generator 1 is mounted on an automobile and includes a stator 2 that constitutes an armature and a rotor 3 that constitutes a field. The stator 2 is composed of an annular armature core 4 formed by laminating a large number of silicon steel plates, a yoke (not shown) that holds the armature core 4, and the like. The armature core 4 has a plurality of ridges (teeth) over the entire inner circumference.
5 are formed, and a plurality of slots 7 for accommodating the three-phase armature windings 6 are formed between these ridges 5. The plurality of slots 7 are formed with a predetermined slot pitch.
【０００７】回転子３は、エンジンに回転駆動される回
転軸８、およびこの回転軸８の外周に固着されたランデ
ル型ポールコア１０等から構成される。ポールコア１０
は、冷鍛成形により製造され、一方の爪状磁極片１１と
他方の爪状磁極片１２とが複数交互に噛み合うように配
列され、中央部に励磁巻線１３を巻回するための円筒部
１４、１５が形成されている。ポールコア１０は、励磁
巻線１３に電流を流すと、励磁巻線１３の起磁力により
一方の爪状磁極片１１が全てＳ極となり、他方の爪状磁
極片１２が全てＮ極となる。The rotor 3 is composed of a rotary shaft 8 which is rotationally driven by the engine, a Randell type pole core 10 fixed to the outer periphery of the rotary shaft 8 and the like. Pole core 10
Is manufactured by cold forging, and one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 are arranged so as to alternately engage with each other, and a cylindrical portion for winding the excitation winding 13 in the central portion. 14 and 15 are formed. In the pole core 10, when a current is passed through the excitation winding 13, one of the claw-shaped magnetic pole pieces 11 becomes an S pole and the other claw-shaped magnetic pole piece 12 becomes an N pole due to the magnetomotive force of the excitation winding 13.
【０００８】一方の爪状磁極片１１および他方の爪状磁
極片１２は、まず回転方向の前縁側と後縁側とのスロッ
ト７の中心線に対するスキュー角度θF0、θR0が共に等
しくなるように（図１参照）、冷鍛成形により等辺台形
状に形成される。なお、本実施例では、このスキュー角
度をθF0＝θR0＝ tan-1（τs ／Ｌ）と規定している。
但し、τs ：スロットピッチ、Ｌ：電機子鉄心の積層厚
さである。そして、冷鍛成形後には、一方の爪状磁極片
１１および他方の爪状磁極片１２の回転方向の前縁側と
なる固定子２との対向面に第１面取り部１６、１７が形
成され、回転方向の後縁側となる固定子２との対向面に
第２面取り部１８、１９が形成される。The claw-shaped magnetic pole piece 11 on the one hand and the claw-shaped magnetic pole piece 12 on the other side are first arranged such that the skew angles θF0 and θR0 with respect to the center line of the slot 7 on the leading edge side and the trailing edge side in the rotation direction are equal (FIG. 1)), and is formed into an isosceles trapezoid by cold forging. In this embodiment, this skew angle is defined as θF0 = θR0 = tan −1 (τs / L).
Here, τs is the slot pitch and L is the laminated thickness of the armature core. After the cold forging, the first chamfered portions 16 and 17 are formed on the surfaces of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 facing the stator 2 on the front edge side in the rotational direction, Second chamfered portions 18 and 19 are formed on the surface facing the stator 2 on the trailing edge side in the rotation direction.
【０００９】第１面取り部１６、１７は、切削加工また
はサイジング（しごき成形）加工によって施され、スロ
ット７の中心線に対して急角度の第１スキュー角度θF
（＜スキュー角度θF0）を持つように形成されている
（図１参照）。第２面取り部１８、１９は、切削加工ま
たはサイジング（しごき成形）加工によって施され、ス
ロット７の中心線に対して緩角度の第２スキュー角度θ
R （≧スキュー角度θR0）を持つように形成されている
（図１参照）。なお、本実施例では、第１スキュー角度
はθF ≒０とし、第２スキュー角度は第１スキュー角度
より緩やかなθR ＝ tan-1（２τs ／Ｌ）と規定してい
る。The first chamfered portions 16 and 17 are formed by cutting or sizing (ironing), and the first skew angle θF is steep with respect to the center line of the slot 7.
(<Skew angle θF0) (see FIG. 1). The second chamfered portions 18 and 19 are formed by cutting or sizing (ironing), and the second skew angle θ is a gentle angle with respect to the center line of the slot 7.
It is formed so as to have R (≧ skew angle θR0) (see FIG. 1). In the present embodiment, the first skew angle is set to θF ≈0, and the second skew angle is defined to be θR = tan −1 (2τs / L) which is gentler than the first skew angle.
【００１０】また、第１面取り部１６、１７の回転方向
の前縁側の除変角度αF は、第２面取り部１８、１９の
回転方向の後縁側の除変角度αR と略同一角度を持つよ
うに形成され、本実施例では、αF ≒αR ≒２５°と規
定している。さらに、第１面取り部１６、１７および第
２面取り部１８、１９の形成位置については、図１に示
したように、一方の爪状磁極片１１および他方の爪状磁
極片１２の中心線より回転方向の前縁側への距離ＷF 、
一方の爪状磁極片１１および他方の爪状磁極片１２の中
心線より回転方向の後縁側への距離ＷR で規定され、Ｗ
F ＜ＷR と設定されている。このため、一方の爪状磁極
片１１および他方の爪状磁極片１２の中心線に対して非
対称の面取りが施された等辺台形状の一方の爪状磁極片
１１および他方の爪状磁極片１２が形成される。なお、
本実施例では、ＷF ≒０．８τs 、ＷR ≒１．３τs と
規定している。The first chamfers 16 and 17 have a rotation angle αF on the leading edge side in the rotation direction which is substantially the same as the angle of change αR on the trailing edge side of the second chamfers 18 and 19 in the rotation direction. And is defined as αF ≈αR ≈25 ° in the present embodiment. Further, regarding the formation positions of the first chamfered portions 16 and 17 and the second chamfered portions 18 and 19, as shown in FIG. 1, from the center line of one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12. Distance WF to the leading edge side in the direction of rotation,
It is defined by the distance WR from the center line of one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 to the trailing edge side in the rotation direction, and
F <WR is set. For this reason, one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 of an equilateral trapezoid shape that are asymmetrically chamfered with respect to the center lines of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12. Is formed. In addition,
In this embodiment, WF ≈ 0.8τs and WR ≈ 1.3τs are specified.
【００１１】この交流発電機１の作動を図１ないし図５
に基づき説明する。励磁巻線１３に電流が流されると、
励磁巻線１３の起磁力により一方の爪状磁極片１１が全
てＳ極となり、他方の爪状磁極片１２が全てＮ極とな
る。そして、一方の爪状磁極片１１および他方の爪状磁
極片１２に形成された第１スキュー角度θF の第１面取
り部１６、１７と第２スキュー角度θR の第２面取り部
１８、１９とにより、一方の爪状磁極片１１および他方
の爪状磁極片１２の回転方向の前縁側と後縁側とでは磁
束−時間変化度合に差が生じる。このため、一方の爪状
磁極片１１および他方の爪状磁極片１２の回転方向の前
縁側で磁束が急増し、後縁側で磁束が徐減することとな
り、爪状磁極の形状において不等辺台形状とした従来技
術と同等の磁束分布が得られる。また、この交流発電機
１は、冷鍛成形後に面取り加工により中心線に対して非
対称の一方の爪状磁極片１１および他方の爪状磁極片１
２を形成するようにしているため、１種類の冷鍛成形型
で右回転仕様と左回転仕様とに容易に対応させることが
できる。このため、本実施例では、右回転仕様のものと
左回転仕様のものとの２種類の冷鍛成形型を用意する必
要はない。The operation of this AC generator 1 is shown in FIGS.
It will be explained based on. When a current is applied to the excitation winding 13,
Due to the magnetomotive force of the excitation winding 13, one of the claw-shaped magnetic pole pieces 11 becomes an S pole and the other claw-shaped magnetic pole piece 12 becomes an N pole. Then, by the first chamfered portions 16 and 17 having the first skew angle θF and the second chamfered portions 18 and 19 having the second skew angle θR formed on the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12, respectively. The degree of magnetic flux-time change is different between the front edge side and the rear edge side in the rotation direction of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12. For this reason, the magnetic flux rapidly increases on the leading edge side of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 in the rotational direction, and gradually decreases on the trailing edge side. A magnetic flux distribution equivalent to that of the prior art having a shape can be obtained. In addition, this AC generator 1 has one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 1 that are asymmetric with respect to the center line by chamfering after cold forging.
Since 2 is formed, one type of cold forging mold can easily correspond to the right rotation specification and the left rotation specification. For this reason, in this embodiment, it is not necessary to prepare two types of cold forging dies, one for right rotation and the other for left rotation.
【００１２】なお、第１面取り部１６、１７および第２
面取り部１８、１９は、冷鍛成形された等辺台形状のポ
ールコア１０の一方の爪状磁極片１１および他方の爪状
磁極片１２に、比較的簡単な切削加工またはサイジング
（しごき成形）加工を施すことによって形成できるの
で、冷鍛成形する際に一方の爪状磁極片１１および他方
の爪状磁極片１２の回転方向の前縁側と後縁側とで成形
圧のアンバランスが生ずることはなく、一方の爪状磁極
片１１および他方の爪状磁極片１２の形状精度を実装可
能な範囲内に容易に確保することができる。本発明で
は、等辺台形状の冷鍛成形型で成形することにより一方
の爪状磁極片１１および他方の爪状磁極片１２の形状そ
のものを不等辺台形としておらず、面取りを施すことに
より等価的に磁束分布を不等辺台形状にしているもので
あるために、磁束分布がソフトであり、交流発電機１の
広い回転域で磁気音の低減効果が大きい。The first chamfers 16, 17 and the second chamfer
The chamfered portions 18 and 19 are formed by relatively simple cutting or sizing (ironing) processing on one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 of the equilateral trapezoidal pole core 10 that is cold forged. Since it can be formed by applying, there is no imbalance in the forming pressure between the front edge side and the rear edge side of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 in the rotational direction during cold forging. The shape accuracy of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 can be easily ensured within a mountable range. In the present invention, the shape itself of the one claw-shaped magnetic pole piece 11 and the other claw-shaped magnetic pole piece 12 is not formed into an isosceles trapezoid by molding with an isosceles trapezoidal cold forging mold, and it is equivalent by chamfering. In addition, since the magnetic flux distribution is unequal trapezoidal, the magnetic flux distribution is soft, and the magnetic noise reduction effect is large in a wide rotation range of the AC generator 1.
【００１３】この実施例の磁気音の低減効果を図５のグ
ラフを用いて説明する。すなわち、等辺台形状の爪状磁
極片を持つ回転子Ａよりも不等辺台形状の爪状磁極片を
持つ回転子Ｂは磁気音の騒音レベル（ｄβ）が低下して
いるが、例えば交流発電機の回転数が３５００ rpm以上
の場合には回転子Ａ、Ｂの差異は少ない。これらの回転
子Ａ、Ｂと比較して、中心線に対して非対称の面取りが
施された等辺台形状の爪状磁極片を持つ回転子（本発
明）Ｃは全回転数域での磁気音の騒音レベルが低下して
いることが確認できる。この原因は、電機子反作用磁軸
が回転変化、すなわち、周波数変化に伴って変化する事
が影響してるものと考えられる。本来、磁束歪をキャン
セルし合う範囲（図５のグラフでは回転数が３０００ r
pm以下程度）では磁気音の低減効果はあるが、電機子反
作用磁軸がずれてくるにしたがい、不等辺台形状の爪状
磁極を持つ回転子Ｂでは急に磁束歪が増加してくる。一
方、本発明Ｃの場合には、異なるスキュー角度で面取り
を施しているので磁束濃淡分布が非対称分布を形成する
ため、電機子反作用磁軸のずれに対する磁束歪の増加が
緩やかであり、図５のグラフで示したような磁気音の低
減効果が生じるものと考えられる。The magnetic noise reduction effect of this embodiment will be described with reference to the graph of FIG. That is, the rotor B having the trapezoidal magnetic pole pieces having an isosceles trapezoidal shape has a lower noise level (dβ) than the rotor A having the trapezoidal magnetic pole pieces having an isosceles trapezoidal shape. When the rotation speed of the machine is 3500 rpm or more, the difference between the rotors A and B is small. Compared with these rotors A and B, a rotor (invention) C having an isosceles trapezoidal pole piece that is chamfered asymmetrically with respect to the center line has a magnetic sound in the entire rotational speed range. It can be confirmed that the noise level is low. It is considered that the cause of this is that the armature reaction magnetic axis changes due to the rotational change, that is, the frequency changes. Originally, the range in which magnetic flux distortion is mutually canceled (in the graph of FIG. 5, the rotation speed is 3000 r
At about pm or less), the magnetic noise can be reduced, but as the armature reaction magnetic axis shifts, the magnetic flux distortion suddenly increases in the rotor B having the trapezoidal magnetic poles having an isosceles trapezoidal shape. On the other hand, in the case of the present invention C, since the chamfering is performed at different skew angles, the magnetic flux density distribution forms an asymmetric distribution, so that the increase in magnetic flux distortion with respect to the displacement of the armature reaction magnetic axis is gradual. It is considered that the effect of reducing the magnetic sound as shown in the graph is generated.
【００１４】本実施例では、θF 、θR 、ＷF 、ＷR 、
αF 、αR について具体的な数値例を示したが、磁気音
を低減したい交流発電機の回転数域のねらいどころ、ま
た交流発電機の電機子のインピーダンスによってθF 、
θR 、ＷF 、ＷR は適宜最適値が異なるとともに、励磁
力の強さ、ギャップの寸法設計、磁極基本形状の設計に
よってαF 、αR は２５°よりも多少ずれた最適値とな
ることは言うまでもない。また、本実施例では、本発明
を自動車用の交流発電機に適用したが、本発明を他の車
両用の交流発電機や定置式の交流発電機に適用しても良
い。さらに、本実施例では、固定子が電機子を構成し、
回転子が界磁を構成するようにしたが、固定子が界磁を
構成し、回転子が電機子を構成するようにしても良い。In this embodiment, θF, θR, WF, WR,
Although specific numerical examples of αF and αR have been shown, θF, depending on the aim of the rotational speed range of the alternator to reduce magnetic noise and the impedance of the armature of the alternator,
It goes without saying that the optimum values of θR, WF, and WR differ appropriately, and αF and αR are slightly different from 25 ° depending on the strength of the exciting force, the size design of the gap, and the design of the basic magnetic pole shape. Further, although the present invention is applied to the AC generator for the vehicle in the present embodiment, the present invention may be applied to the AC generator for other vehicles or the stationary AC generator. Further, in this embodiment, the stator constitutes an armature,
Although the rotor forms the field, the stator may form the field and the rotor may form the armature.
【００１５】[0015]
【発明の効果】本発明は、中心線に対して非対称の複数
の爪状磁極片の形状精度を容易に確保することができ
る。According to the present invention, it is possible to easily secure the shape accuracy of a plurality of claw-shaped magnetic pole pieces which are asymmetric with respect to the center line.
【図１】回転子の爪状磁極片を示した平面図である。FIG. 1 is a plan view showing a claw-shaped magnetic pole piece of a rotor.
【図２】回転子の爪状磁極片を示した側面図である。FIG. 2 is a side view showing a claw-shaped magnetic pole piece of a rotor.
【図３】固定子および回転子を示した側面図である。FIG. 3 is a side view showing a stator and a rotor.
【図４】固定子および回転子を示した断面図である。FIG. 4 is a sectional view showing a stator and a rotor.
【図５】交流発電機の回転数と磁気音の騒音レベルとの
関係を示したグラフである。FIG. 5 is a graph showing the relationship between the rotation speed of the AC generator and the noise level of magnetic noise.
１ 交流発電機 ２ 固定子 ３ 回転子 ６ 三相電機子巻線 ７ スロット １１ 一方の爪状磁極片 １２ 他方の爪状磁極片 １６ 第１面取り部 １７ 第１面取り部 １８ 第２面取り部 １９ 第２面取り部 DESCRIPTION OF SYMBOLS 1 AC generator 2 Stator 3 Rotor 6 Three-phase armature winding 7 Slot 11 One claw-shaped magnetic pole piece 12 The other claw-shaped magnetic pole piece 16 First chamfered portion 17 First chamfered portion 18 Second chamfered portion 19th 2 chamfer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 武司 愛知県刈谷市昭和町１丁目１番地 日本電 装株式会社内 (72)発明者 ▲ませ▼木 一 愛知県刈谷市昭和町１丁目１番地 日本電 装株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takeshi Yamamoto 1-1, Showa-cho, Kariya city, Aichi Prefecture, Nihon Denso Co., Ltd. (72) Inventor ▲ Ma ▼ Kiichi 1-1, Showa-cho, Kariya city, Aichi prefecture Within Nippondenso Co., Ltd.
Claims (1)
固定子と、この固定子に対向して配置され、互いに噛み
合う複数の爪状磁極片を有する回転子とを備えた交流発
電機において、 前記複数の爪状磁極片は、 回転方向の前縁側となる前記固定子との対向面に、前記
スロットの中心線に対して第１スキュー角度の面取りが
施された第１面取り部、 および回転方向の後縁側となる前記固定子との対向面
に、前記スロットの中心線に対して前記第１スキュー角
度より大きい第２スキュー角度の面取りが施された第２
面取り部を有することを特徴とする交流発電機。1. An alternator comprising: a stator having a plurality of slots for accommodating windings; and a rotor having a plurality of claw-shaped magnetic pole pieces arranged to face the stator and mesh with each other. The plurality of claw-shaped magnetic pole pieces have a first chamfered portion, which is chamfered at a first skew angle with respect to the center line of the slot, on a surface facing the stator, which is a front edge side in the rotation direction, and a rotation. A second surface having a second skew angle larger than the first skew angle with respect to a center line of the slot is chamfered on a surface facing the stator on a trailing edge side in the second direction.
An alternator having a chamfered portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24579191A JP3223536B2 (en) | 1991-09-25 | 1991-09-25 | Alternator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24579191A JP3223536B2 (en) | 1991-09-25 | 1991-09-25 | Alternator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0591702A true JPH0591702A (en) | 1993-04-09 |
| JP3223536B2 JP3223536B2 (en) | 2001-10-29 |
Family
ID=17138890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24579191A Expired - Fee Related JP3223536B2 (en) | 1991-09-25 | 1991-09-25 | Alternator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3223536B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5708318A (en) * | 1996-02-09 | 1998-01-13 | Denso Corporation | AC generator |
| US6433455B1 (en) | 2000-01-26 | 2002-08-13 | Mitsubishi Denki Kabushiki Kaisha | Vehicle AC generator |
| WO2012001817A1 (en) * | 2010-07-02 | 2012-01-05 | 株式会社 日立製作所 | Ac generator for vehicle |
| CN107078571A (en) * | 2014-11-12 | 2017-08-18 | 法雷奥电机设备公司 | Rotor for electric rotating machine |
| CN108292870A (en) * | 2015-12-01 | 2018-07-17 | 法雷奥电机设备公司 | Electric rotating machine claw rotor with enhancing magnetic property |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3789361B2 (en) | 2002-01-18 | 2006-06-21 | 株式会社デンソー | AC generator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6111066B2 (en) | 2012-12-28 | 2017-04-05 | サンデンホールディングス株式会社 | vending machine |
-
1991
- 1991-09-25 JP JP24579191A patent/JP3223536B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5708318A (en) * | 1996-02-09 | 1998-01-13 | Denso Corporation | AC generator |
| US6433455B1 (en) | 2000-01-26 | 2002-08-13 | Mitsubishi Denki Kabushiki Kaisha | Vehicle AC generator |
| WO2012001817A1 (en) * | 2010-07-02 | 2012-01-05 | 株式会社 日立製作所 | Ac generator for vehicle |
| CN107078571A (en) * | 2014-11-12 | 2017-08-18 | 法雷奥电机设备公司 | Rotor for electric rotating machine |
| CN108292870A (en) * | 2015-12-01 | 2018-07-17 | 法雷奥电机设备公司 | Electric rotating machine claw rotor with enhancing magnetic property |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3223536B2 (en) | 2001-10-29 |
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| LAPS | Cancellation because of no payment of annual fees |