JP2001112194A - Structure for slot teeth of dynamo-electric machine - Google Patents
Structure for slot teeth of dynamo-electric machineInfo
- Publication number
- JP2001112194A JP2001112194A JP28631499A JP28631499A JP2001112194A JP 2001112194 A JP2001112194 A JP 2001112194A JP 28631499 A JP28631499 A JP 28631499A JP 28631499 A JP28631499 A JP 28631499A JP 2001112194 A JP2001112194 A JP 2001112194A
- Authority
- JP
- Japan
- Prior art keywords
- slot
- rotor
- stator
- electric machine
- present
- 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.)
- Withdrawn
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は回転電機のスロット
歯構造に関し、特に同期発電機などに適用して有用なも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slot tooth structure of a rotating electric machine, and is particularly useful when applied to a synchronous generator or the like.
【０００２】[0002]
【０００３】図４は従来の同期発電機の横断面図、図５
は図４のＡ部拡大図である。図４において、１は固定
子、２は回転子であり、固定子１の内周部には、固定子
巻線（図示せず）を設けるためのスロット３が周方向に
亘って多数形成されており、これらのスロット３の間が
スロット歯４となっている。FIG. 4 is a cross-sectional view of a conventional synchronous generator, and FIG.
FIG. 5 is an enlarged view of a portion A in FIG. 4. In FIG. 4, 1 is a stator, 2 is a rotor, and a number of slots 3 for providing a stator winding (not shown) are formed in the inner peripheral portion of the stator 1 along the circumferential direction. And between the slots 3 are slot teeth 4.
【０００４】そして、図５に示すように、スロット歯４
の先端部分４ａは、図中に点線で仮想的に示す回転子２
と同心円Ｂ上に位置している。[0004] Then, as shown in FIG.
Of the rotor 2 is indicated by a dotted line in the figure.
And concentric circle B.
【０００５】[0005]
【発明が解決しようとする課題】上記従来のスロット歯
構造では、図３（ａ）に示すように、回転子２から出て
いる磁束線５が、回転子２と固定子１とのギャップ６を
経て固定子１のスロット歯４を通るときにスロット歯４
の角部４ｃに集中することから、ギャップ６の中央の磁
束密度分布を調べると、スロット歯４の角部４ｃの直下
で磁束密度が最も高くなり、この磁束密度とスロット３
の真下における磁束密度との差が大きくなるため、スロ
ット高調波が大きくなってしまう。In the above-mentioned conventional slot tooth structure, as shown in FIG. 3 (a), a magnetic flux line 5 coming out of the rotor 2 causes a gap 6 between the rotor 2 and the stator 1 to move. Through the slot teeth 4 of the stator 1
When the magnetic flux density distribution at the center of the gap 6 is examined, the magnetic flux density becomes highest immediately below the corner 4c of the slot tooth 4, and this magnetic flux density and the slot 3
Since the difference from the magnetic flux density immediately below the slot harmonic increases, the slot harmonics increase.
【０００６】即ち、同期発電機によって発電した三相交
流電圧波形にはスロットに起因した高調波がのってお
り、このことが、等価正弦波との差である波形狂い率を
大きくする要因となっている。That is, the three-phase AC voltage waveform generated by the synchronous generator has a harmonic caused by the slot, which is a factor that increases the waveform distortion rate, which is a difference from the equivalent sine wave. Has become.
【０００７】このため、現在の同期発電機では、スロッ
ト高調波の影響を抑制するために、回転子や固定子のス
ロットを１スロット分ひねったスキュー構造にするこ
と、或いは、毎極毎相のスロット数ｑを大きくすること
や分数にすることで、高調波の次数を高くしてスロット
高調波を減少させている。For this reason, in the current synchronous generator, in order to suppress the influence of slot harmonics, a skew structure in which the slots of the rotor and the stator are twisted by one slot, By increasing the number of slots q or making it a fraction, the order of harmonics is increased to reduce slot harmonics.
【０００８】しかし、スキュー構造は軸方向にねじる構
造であるため、工数が増えて製作期間が長くなってしま
う。また、スキューレス構造とした場合には波形狂い率
が大きくなってしまう。[0008] However, since the skew structure is a structure in which it is twisted in the axial direction, the number of man-hours increases and the manufacturing period becomes longer. In addition, in the case of a skewless structure, the waveform distortion rate increases.
【０００９】従って、本発明は上記の問題点に鑑み、簡
単な構造で容易にスロット高調波を低減することができ
る回転電機のスロット歯構造を提供することを課題とす
る。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a slot tooth structure of a rotating electrical machine that can easily reduce slot harmonics with a simple structure in view of the above problems.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決する本発
明の回転電機のスロット歯構造は、回転電機の固定子又
は回転子に形成したスロット歯構造において、前記固定
子のスロット歯の先端部分を、前記回転子と同心円より
も回転子側に凸な形状としたこと、又は、前記回転子の
スロット歯の先端部分を、前記回転子と同心円よりも固
定子側に凸な形状としたことを特徴とする。According to the present invention, there is provided a slot tooth structure of a rotating electric machine according to the present invention, wherein a slot tooth structure formed on a stator or a rotor of the rotating electric machine includes a tip portion of a slot tooth of the stator. Has a shape that is more convex toward the rotor than the concentric circle with the rotor, or has a tip portion of the slot teeth of the rotor that is more convex toward the stator than the circle that is concentric with the rotor. It is characterized by.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１２】図１は本発明の実施の形態に係る同期発電
機の横断面図、図２は図１のＣ部拡大図である。また、
図３は従来のスロット歯構造と本発明の実施の形態に係
るスロット歯とにおける磁束線及びギャップ中央の磁束
密度分布の比較図であり、図３（ａ）には従来のスロッ
ト歯構造の場合を示し、図３（ｂ）には本発明の実施の
形態に係るスロット歯構造の場合を示す。FIG. 1 is a transverse sectional view of a synchronous generator according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion C in FIG. Also,
FIG. 3 is a comparison diagram of the magnetic flux lines and the magnetic flux density distribution at the center of the gap between the conventional slot tooth structure and the slot tooth according to the embodiment of the present invention. FIG. FIG. 3B shows a case of the slot tooth structure according to the embodiment of the present invention.
【００１３】図１において、１１は固定子、１２は回転
子であり、固定子１１の内周部には、固定子巻線（図示
せず）を設けるためのスロット１３が周方向に亘って多
数形成されており、これらのスロット１３の間がスロッ
ト歯１４となっている。In FIG. 1, reference numeral 11 denotes a stator, and reference numeral 12 denotes a rotor. A slot 13 for providing a stator winding (not shown) is provided in an inner peripheral portion of the stator 11 in a circumferential direction. A large number of them are formed, and between these slots 13 are slot teeth 14.
【００１４】そして、図２に示すように、固定子１１の
スロット歯１４の先端部分１４ａは、図中に点線で仮想
的に示す回転子１２と同心円Ｂよりも回転子１２側に凸
な形状となっている。つまり、従来は同心円Ｂ上に位置
していたスロット歯の先端部分を、その同心円Ｂよりも
回転子側に凸な構造としている。As shown in FIG. 2, the tip portion 14a of the slot tooth 14 of the stator 11 has a shape which is more convex toward the rotor 12 than the concentric circle B of the rotor 12 shown by a dotted line in the figure. It has become. That is, the tip portion of the slot tooth conventionally located on the concentric circle B has a structure that is more convex than the concentric circle B toward the rotor.
【００１５】このため、本実施の形態の同期発電機のス
ロット歯構造によれば、スロット歯１４の先端部分１４
ａを、回転子１２と同心円Ｂよりも回転子１２側に凸な
形状としたため、図３（ｂ）に示すように、回転子１２
から出ている磁束線１５のスロット歯１４の角部１４ｂ
における集中（図３（ａ）参照）が緩和されて、回転子
１２と固定子１１とのギャップ１６の中央の磁束密度分
布も緩和される。For this reason, according to the slot tooth structure of the synchronous generator of the present embodiment, the tip portion 14 of the slot tooth 14
Since a is a shape that is more convex toward the rotor 12 than the concentric circle B with the rotor 12, as shown in FIG.
Corner portion 14b of slot tooth 14 of magnetic flux line 15 emerging from
(See FIG. 3A) is alleviated, and the magnetic flux density distribution at the center of the gap 16 between the rotor 12 and the stator 11 is also alleviated.
【００１６】その結果、本同期発電機で発電する三相交
流電圧波形のスロット高調波が低減されて、波形狂い率
が小さくなる。しかも、簡単な構造で容易にスロット高
調波を低減することができる。As a result, the slot harmonics of the three-phase AC voltage waveform generated by the synchronous generator are reduced, and the waveform distortion rate is reduced. Moreover, slot harmonics can be easily reduced with a simple structure.
【００１７】なお、本発明のスロット歯構造は、特に同
期発電機に適用して有用なものであるが、これに限定す
るものではなく、同期電動機にも適用することができ、
コギングトルクの低減などを図ることができる。また、
本発明のスロット歯構造は、固定子のスロット歯に限定
するものでもなく、回転子のスロット歯に適用してもよ
い。また、本発明のスロット歯構造は、回転子に永久磁
石を用いた永久磁石型の同期機や、回転子に回転子巻線
を設けた同期機にも適用することができる。また、本発
明のスロット歯構造は、同期機に限定されず、誘導機な
どに適用することもできる。The slot tooth structure of the present invention is particularly useful when applied to a synchronous generator. However, the present invention is not limited to this, and can be applied to a synchronous motor.
Cogging torque can be reduced. Also,
The slot tooth structure of the present invention is not limited to the slot teeth of the stator, but may be applied to the slot teeth of the rotor. Further, the slot tooth structure of the present invention can be applied to a permanent magnet type synchronous machine using a permanent magnet for a rotor or a synchronous machine having a rotor provided with a rotor winding. Further, the slot tooth structure of the present invention is not limited to a synchronous machine, but can be applied to an induction machine or the like.
【００１８】[0018]
【発明の効果】以上発明の実施の形態とともに具体的に
説明したように、本発明の回転電機のスロット歯構造に
よれば、固定子のスロット歯の先端部分を、回転子と同
心円よりも回転子側に凸な形状としたこと、又は、回転
子のスロット歯の先端部分を、回転子と同心円よりも固
定子側に凸な形状としたことにより、スロット歯の角部
における磁束線の集中が緩和されて、回転子と固定子と
のギャップの中央の磁束密度分布も緩和され、その結
果、スロット高調波が低減される。しかも、簡単な構造
で容易にスロット高調波を低減することができる。As described above in detail with the embodiments of the present invention, according to the slot tooth structure of the rotating electric machine of the present invention, the tip of the slot teeth of the stator is rotated more than the concentric circle with the rotor. Concentration of magnetic flux lines at the corners of the slot teeth by making the shape convex toward the stator side or by making the tip of the slot teeth of the rotor more convex toward the stator side than the concentric circle with the rotor. Is reduced, the magnetic flux density distribution at the center of the gap between the rotor and the stator is also reduced, and as a result, slot harmonics are reduced. Moreover, slot harmonics can be easily reduced with a simple structure.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施の形態に係る同期発電機の横断面
図である。FIG. 1 is a cross-sectional view of a synchronous generator according to an embodiment of the present invention.
【図２】図１のＣ部拡大図である。FIG. 2 is an enlarged view of a portion C in FIG. 1;
【図３】従来のスロット歯構造と本発明の実施の形態に
係るスロット歯とにおける磁束線及びギャップ中央の磁
束密度分布の比較図である。FIG. 3 is a comparison diagram of magnetic flux lines and a magnetic flux density distribution at the center of a gap between a conventional slot tooth structure and a slot tooth according to an embodiment of the present invention.
【図４】従来の同期発電機の横断面図である。FIG. 4 is a cross-sectional view of a conventional synchronous generator.
【図５】図４のＡ部拡大図である。FIG. 5 is an enlarged view of a portion A in FIG. 4;
１１ 固定子 １２ 回転子 １３ スロット １４ スロット歯 １４ａ スロット歯の先端部分 １４ｂ スロット歯の角部 DESCRIPTION OF SYMBOLS 11 Stator 12 Rotor 13 Slot 14 Slot tooth 14a Tip end of slot tooth 14b Corner of slot tooth
Claims (1)
スロット歯構造において、 前記固定子のスロット歯の先端部分を、前記回転子と同
心円よりも回転子側に凸な形状としたこと、又は、前記
回転子のスロット歯の先端部分を、前記回転子と同心円
よりも固定子側に凸な形状としたことを特徴とする回転
電機のスロット歯構造。1. A slot tooth structure formed in a stator or a rotor of a rotating electric machine, wherein a tip portion of a slot tooth of the stator has a shape that is more convex toward the rotor than a concentric circle with the rotor. Alternatively, a slot tooth structure of a rotating electric machine, wherein a tip portion of a slot tooth of the rotor is formed to have a shape that is more convex toward the stator than a circle concentric with the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28631499A JP2001112194A (en) | 1999-10-07 | 1999-10-07 | Structure for slot teeth of dynamo-electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28631499A JP2001112194A (en) | 1999-10-07 | 1999-10-07 | Structure for slot teeth of dynamo-electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001112194A true JP2001112194A (en) | 2001-04-20 |
Family
ID=17702790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28631499A Withdrawn JP2001112194A (en) | 1999-10-07 | 1999-10-07 | Structure for slot teeth of dynamo-electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001112194A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009089546A (en) * | 2007-10-02 | 2009-04-23 | Hitachi Appliances Inc | Permanent magnet rotary electric machine for washing machine |
| JPWO2010103634A1 (en) * | 2009-03-11 | 2012-09-10 | 株式会社日立製作所 | AC generator for vehicles |
-
1999
- 1999-10-07 JP JP28631499A patent/JP2001112194A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009089546A (en) * | 2007-10-02 | 2009-04-23 | Hitachi Appliances Inc | Permanent magnet rotary electric machine for washing machine |
| JPWO2010103634A1 (en) * | 2009-03-11 | 2012-09-10 | 株式会社日立製作所 | AC generator for vehicles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070109 |