JPS6220776B2 - - Google Patents
Info
- Publication number
- JPS6220776B2 JPS6220776B2 JP3520678A JP3520678A JPS6220776B2 JP S6220776 B2 JPS6220776 B2 JP S6220776B2 JP 3520678 A JP3520678 A JP 3520678A JP 3520678 A JP3520678 A JP 3520678A JP S6220776 B2 JPS6220776 B2 JP S6220776B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic flux
- magnetic
- flux distribution
- winding
- damper
- 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
Links
Landscapes
- Windings For Motors And Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は突極形の磁極に改良されて配置された
ダンパ巻線を有する突極形同期機に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a salient pole type synchronous machine having a damper winding arranged in an improved manner on a salient pole type magnetic pole.
周知のように突極形同期機では運転の安定性増
強、乱調防止のために突極磁極の表面近くにダン
パ巻線が配置されている。
As is well known, in a salient pole type synchronous machine, a damper winding is arranged near the surface of the salient magnetic pole in order to enhance operational stability and prevent disturbances.
従来例による突極形同期機の回転子における磁
極のダンパ巻線の配列を第１図ａに示す。固定子
は図示されていない。図において１は突極形同期
機の回転子磁極鉄心、２はその頂部域に分散して
配列された巻線溝、３は巻線溝２内に挿入された
ダンパ巻線導体である。各巻線導体３は両端にて
図示されていない短絡環を介して相互接続されて
いる。しかも従来では各巻線導体３の配列ピツチ
Ｐが等しく、磁極中心０に対して対称的に配置さ
れているのが通常である。一方同期機の空〓磁束
分布について考察するに、無負荷状態での界磁電
流に基づく磁束分布は第１図ｂにおけるＡ線の如
く磁極中心Ｏに対して対称分布となる。 The arrangement of the damper windings of the magnetic poles in the rotor of a conventional salient pole type synchronous machine is shown in FIG. 1a. The stator is not shown. In the figure, 1 is a rotor magnetic pole core of a salient pole type synchronous machine, 2 is a winding groove arranged dispersedly in the top region, and 3 is a damper winding conductor inserted into the winding groove 2. Each winding conductor 3 is interconnected at both ends via a shorting ring (not shown). Moreover, conventionally, each winding conductor 3 has the same arrangement pitch P and is usually arranged symmetrically with respect to the magnetic pole center 0. On the other hand, considering the magnetic flux distribution in the air of a synchronous machine, the magnetic flux distribution based on the field current in a no-load state becomes a symmetrical distribution with respect to the magnetic pole center O, as shown by line A in FIG. 1b.
しかして負荷状態では周知の如く電機子反作用
が生じ、特にその横軸反作用によつて偏磁作用が
加わることになる。この偏磁作用は同期発電機で
は回転方向をＲとすれば磁極の前半域で減磁、後
半域で増磁させることになり、その磁束分布は図
中のＢ線の如くである。なお同期電動機では偏磁
作用が逆になる。即ち負荷時における空〓磁束分
布Ｂは磁極中心０に対して非対称となり、その高
磁束分布領域B′と低磁束分布領域B″にダンパ巻
線導体３が分散して配置されることになる。かか
る構成ではダンパ巻線の導体３は非磁性材料であ
るために、磁極１の頂部域の磁路となる鉄心断面
は各巻線溝２によつて狭ばめられ、各巻線溝２の
間に規制されることになる。しかして中小容量
機、ないしは設計的に裕度がある同期機では殆ど
問題となることがないが、最近の傾向の如く設計
的にもコンパクト化が要求される大容量機などで
は、前述の如くダンパ巻線によつて鉄心磁路が狭
ばめられる結果、高磁束分布領域にて磁極鉄心内
の磁束密度が極めて高くなり磁気飽和が生じるこ
とがある。この結果、負荷時における界磁電流の
増加を惹起するのみならず、またダンパ巻線内に
侵入して鎖交する洩れ磁束が増大するためにダン
パ巻線の過熱、大きな電磁力が加わり、この応力
の繰返しによつてダンパ巻線導体が折損されるこ
とがある。 As is well known, armature reaction occurs in a loaded state, and in particular, the transverse axis reaction causes a biased magnetic effect. In a synchronous generator, when the rotation direction is R, this biased magnetization effect causes demagnetization in the first half of the magnetic pole and magnetization in the second half, and the magnetic flux distribution is as shown by line B in the figure. Note that in a synchronous motor, the biased magnetic effect is reversed. That is, the magnetic flux distribution B in the air under load is asymmetrical with respect to the magnetic pole center 0, and the damper winding conductors 3 are distributed and arranged in the high magnetic flux distribution region B' and the low magnetic flux distribution region B''. In this configuration, since the conductor 3 of the damper winding is made of a non-magnetic material, the cross section of the core serving as the magnetic path in the top region of the magnetic pole 1 is narrowed by each winding groove 2, and there is no space between each winding groove 2. However, this is hardly a problem for small-to-medium capacity machines or synchronous machines with ample design margin, but there is a recent trend for large-capacity machines that require a more compact design. In machines, as mentioned above, as a result of the core magnetic path being narrowed by the damper winding, the magnetic flux density within the magnetic pole core becomes extremely high in the high magnetic flux distribution region, which may cause magnetic saturation. Not only does this cause an increase in the field current under load, but also the leakage magnetic flux that enters and interlinks within the damper winding increases, leading to overheating of the damper winding, a large electromagnetic force, and the repetition of this stress. The damper winding conductor may be broken due to
本発明は上述の欠点を除去し、負荷時運転状態
でも磁気飽和を抑制して界磁電流が増加するのを
防止するとともに、熱的機械的負担を軽減させる
ことができる巧みはダンパ巻線が配置された磁極
を備えた突極形同期機を得ようとするものであ
る。
The present invention eliminates the above-mentioned drawbacks, suppresses magnetic saturation even under load operation, prevents field current from increasing, and reduces thermal and mechanical loads. The purpose is to obtain a salient pole type synchronous machine with arranged magnetic poles.
本発明は、磁極の頂部に配列した巻線溝内にダ
ンパ巻線導体を嵌装した回転子を備える突極形同
期機において、磁極頂部域の鉄心断面を磁極の高
磁束分布領域では低磁束分布領域と較べて大きく
選定されたダンパ巻線が、磁極の頂部に設けら
れ、負荷時の鉄心磁路の磁束密度がそれぞれの磁
極の全域に当たりほぼ均等になるようにしたもの
である。
The present invention provides a salient pole type synchronous machine equipped with a rotor in which damper winding conductors are fitted in winding grooves arranged at the top of the magnetic poles, and in which the iron core cross section in the top region of the magnetic poles has a low magnetic flux in the high magnetic flux distribution area of the magnetic poles. A damper winding selected to be larger than the distribution area is provided at the top of the magnetic pole, so that the magnetic flux density of the core magnetic path during load is approximately uniform over the entire area of each magnetic pole.
第２図に示す実施例では、ダンパ巻線導体３は
磁極１における第１図ｂに示された負荷時の空〓
磁束分布Ｂに対応するその高磁束分布領域B′を除
く他の低磁束分布領域B″にのみ配列されてい
る。
In the embodiment shown in FIG. 2, the damper winding conductor 3 is arranged at
They are arranged only in other low magnetic flux distribution areas B'' excluding the high magnetic flux distribution area B' corresponding to the magnetic flux distribution B.
この場合にダンパ巻線導体３の数は第１図ａと
同じであり、巻線導体の配列ピツチP′は等間隔で
第１図ａのピツチＰに対してＰ＞P′となる。 In this case, the number of damper winding conductors 3 is the same as in FIG. 1a, and the arrangement pitch P' of the winding conductors is equally spaced such that P>P' with respect to the pitch P in FIG. 1a.
また第３図に示す実施例では、各巻線導体３が
磁極１の頂部全域に分散して配置されているが、
特に高磁束分布領域B′ではピツチP1が大に、一方
低磁束分布領域B″ではピツチP2が小に選定され
ている。 Further, in the embodiment shown in FIG. 3, each winding conductor 3 is distributed over the entire top of the magnetic pole 1, but
In particular, the pitch P 1 is selected to be large in the high magnetic flux distribution region B', while the pitch P 2 is selected to be small in the low magnetic flux distribution region B''.
上記各実施例の構成は、いづれも各ダンパ巻線
溝２により狭ばめられて制限される磁極１の頂部
域における磁路鉄心断面が、高磁束分布領域B′で
は他の低磁束分布領域B″と較べて大に選定され
る如く、ダンパ巻線の各導体３が磁極１の中心０
に対して非対称に配列されている。かかる構成に
よれば、負荷時の空〓磁束分布が電機子反作用に
より第１図ｂのＢ線の如く偏磁されても、磁極１
の頂部域における高磁束分布領域での鉄心断面が
充分に確保されているので鉄心磁路の磁束密度分
布は全域でほぼ均等化され、磁気飽和が避けられ
る。 In each of the above embodiments, the magnetic path core cross section in the top region of the magnetic pole 1 narrowed and restricted by each damper winding groove 2 is different from the other low magnetic flux distribution region in the high magnetic flux distribution region B'. B'', each conductor 3 of the damper winding is set at the center 0 of the magnetic pole 1.
arranged asymmetrically. According to this configuration, even if the air magnetic flux distribution under load is biased as shown by line B in FIG. 1b due to armature reaction, the magnetic pole 1
Since the core cross section in the high magnetic flux distribution region in the top region of the core is sufficiently secured, the magnetic flux density distribution of the core magnetic path is almost equalized over the entire region, and magnetic saturation is avoided.
従つて従来のダンパ巻線配列によつて生ずる界
磁電流の増加、ダンパ巻線に対する洩れ磁束の影
響などが軽減される。加えてダンパ巻線配置域の
磁束密度分布が均等化されることにより、各ダン
パ巻線３のダンパ作用が十分得られるようになる
など、本発明により優れた効果を奏することがで
きる。
Therefore, the increase in field current caused by the conventional damper winding arrangement and the influence of leakage magnetic flux on the damper winding are reduced. In addition, by equalizing the magnetic flux density distribution in the damper winding arrangement region, the present invention can produce excellent effects such as a sufficient damping effect of each damper winding 3.
なお、本発明は同期発電機、同期電動機いづれ
に対しても実施適用することができる。 Note that the present invention can be applied to both synchronous generators and synchronous motors.
第１図は従来の突極形同期機における磁極の説
明図で、第１図ａはダンパ巻線配置図、第１図ｂ
は無負荷時、および負荷時における空〓磁束分布
図、第２図、第３図はそれぞれ本発明の異なる実
施例に基づく突極形同期機における磁極のダンパ
巻線の配置図である。
１：回転子磁極、２：巻線溝、３：ダンパ巻線
導体、０：磁極中心、P′，P1，P2：巻線導体の配
列ピツチ、Ａ：無負荷時の界磁電流による空〓磁
束分布曲線、Ｂ：負荷時の空〓磁束分布曲線、
B′：高磁束分布領域、B″：低磁束分布領域。
Figure 1 is an explanatory diagram of the magnetic poles in a conventional salient pole type synchronous machine, Figure 1a is a diagram of the damper winding arrangement, and Figure 1b is
2 and 3 are diagrams showing the air magnetic flux distribution under no load and under load, respectively, and FIGS. 2 and 3 are layout diagrams of damper windings of magnetic poles in salient pole type synchronous machines based on different embodiments of the present invention. 1: Rotor magnetic pole, 2: Winding groove, 3: Damper winding conductor, 0: Center of magnetic pole, P', P 1 , P 2 : Arrangement pitch of winding conductor, A: Depends on field current at no load Empty magnetic flux distribution curve, B: Empty magnetic flux distribution curve under load,
B′: High magnetic flux distribution area, B″: Low magnetic flux distribution area.
Claims (1)
ダンパ巻線導体を嵌装した回転子を備える突極形
同期機において、負荷時の空〓磁束分布に対応し
て各ダンパ巻線溝により制限される磁極頂部域の
鉄心断面を高磁束分布領域では低磁束分布領域と
較べて大に選定されたダンパ巻線が、磁極の頂部
に設けられていることを特徴とする突極形同期
機。 ２ 特許請求の範囲第１項記載の突極形同期機に
おいて、ダンパ巻線が磁極の高磁束分布領域を除
く他の領域に配列設置されていることを特徴とす
る突極形同期機。 ３ 特許請求の範囲第１項記載の突極形同期機に
おいて、ダンパ巻線が磁極の高磁束分布領域では
巻線ピツチを大に、磁極の低磁束分布領域では巻
線ピツチを小に定めて配列設置されていることを
特徴とする突極形同期機。[Claims] 1. A salient pole type synchronous machine comprising a stator and a rotor in which damper winding conductors are fitted in winding grooves arranged at the top of the magnetic poles, to cope with air magnetic flux distribution under load. The cross-section of the core in the top region of the magnetic pole limited by each damper winding groove is selected to be larger in the high magnetic flux distribution region than in the low magnetic flux distribution region.The damper winding is provided at the top of the magnetic pole. Characteristic salient pole type synchronous machine. 2. A salient pole synchronous machine according to claim 1, wherein the damper windings are arranged in an area other than the high magnetic flux distribution area of the magnetic pole. 3 In the salient pole type synchronous machine according to claim 1, the damper winding has a large winding pitch in a high magnetic flux distribution area of the magnetic pole, and a small winding pitch in a low magnetic flux distribution area of the magnetic pole. A salient pole type synchronous machine characterized by being installed in an array.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3520678A JPS54127508A (en) | 1978-03-27 | 1978-03-27 | Damper windings of salient-pole type synchronizer |
| CA324,231A CA1115320A (en) | 1978-03-27 | 1979-03-27 | Damper winding in a salient-pole type synchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3520678A JPS54127508A (en) | 1978-03-27 | 1978-03-27 | Damper windings of salient-pole type synchronizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54127508A JPS54127508A (en) | 1979-10-03 |
| JPS6220776B2 true JPS6220776B2 (en) | 1987-05-08 |
Family
ID=12435371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3520678A Granted JPS54127508A (en) | 1978-03-27 | 1978-03-27 | Damper windings of salient-pole type synchronizer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS54127508A (en) |
| CA (1) | CA1115320A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2842361A1 (en) * | 2002-07-10 | 2004-01-16 | Leroy Somer Moteurs | High efficiency alternators having magnetic body with winding and shock absorbers carrying electrical conductor through holes perpendicular rotation axis. |
| GB201311056D0 (en) | 2013-06-21 | 2013-08-07 | Cummins Generator Technologies | Rotor for a rotating electrical machine |
| DE102024125219A1 (en) | 2024-09-04 | 2026-03-05 | Audi Aktiengesellschaft | Rotor for a separately excited synchronous machine |
-
1978
- 1978-03-27 JP JP3520678A patent/JPS54127508A/en active Granted
-
1979
- 1979-03-27 CA CA324,231A patent/CA1115320A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1115320A (en) | 1981-12-29 |
| JPS54127508A (en) | 1979-10-03 |
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