JP3360949B2 - Winding rotor coil - Google Patents
Winding rotor coilInfo
- Publication number
- JP3360949B2 JP3360949B2 JP21011194A JP21011194A JP3360949B2 JP 3360949 B2 JP3360949 B2 JP 3360949B2 JP 21011194 A JP21011194 A JP 21011194A JP 21011194 A JP21011194 A JP 21011194A JP 3360949 B2 JP3360949 B2 JP 3360949B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- end portion
- rotor
- rotor coil
- coil end
- 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
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、回転電機に係わり、特
に、可変速揚水発電機に組み込まれる巻線形回転子コイ
ルに関する。
【０００２】
【従来の技術】可変速揚水発電機では、巻線形回転子コ
イルが採用されるため、運転時に作用する遠心力に対し
通常の水車発電機とは異なる方法で巻線形回転子コイル
を支持固定する必要がある。
【０００３】従来の可変速揚水発電機の回転子コイル１
は、図４に示すように、回転子鉄心２のスロット内にコ
イル直線部３を納めた後、図示しないスロット楔により
固定され、回転子鉄心２の端部から外方に突出した回転
子コイルエンド部４は、回転子鉄心２の端部に連結固定
された支えリング５と回転子コイルエンド部４との間、
および回転子コイルエンド部４の相互間などに絶縁スペ
ーサ６を配置して、上下回転子コイルエンド部４の端部
に外周面に非磁鋼、あるいは熱硬化性樹脂を含浸したガ
ラス繊維などのバインドコード７を巻回結合して支持固
定していた。支えリング５はステー８により支えられて
いる。
【０００４】
【発明が解決しようとする課題】上記構成の回転子コイ
ルでは、運転時に回転子コイルエンド部４に作用する遠
心力は、絶縁スペーサ６を介してバインドコード７で支
えられているので、回転子コイルエンド部４のうち、バ
インドコード７で支えられている部分の遠心力による外
形方向への変形は、極めて小さく抑えられる。しかし、
バインドコード７で支えられていない部分（回転子コイ
ルエンド部４のバインドコード７の間の部分）は、何の
支持部材がないので遠心力による外形方向への変形が生
じる。
【０００５】回転子径の大きな高周速の大形可変速揚水
発電機になると、回転子コイルエンド部４に作用する遠
心力が大きいので、上記の理由からバインドコード７が
存在しない位置の回転子コイルエンド部４の外形方向へ
の変形が大きくなり、回転子コイルエンド部４に施され
た絶縁層９が機械的に損傷してしまうことがある。
【０００６】一方、遠心力によるバインドコード７の支
持部間の回転子コイルエンド部４の径方向曲げ変形量ｙ
は、回転子コイルエンド部４の単位長さ当たりに働く遠
心力をｗ、バインドコード７の支持部間の距離をＬ、回
転子コイルエンド部４の曲げ弾性率をＥ、回転子コイル
エンド部４の断面二次モーメントをＩとすれば、
ｙ＝５ＷＬ4 ／（３８４ＥＩ）
で表せられる。
【０００７】したがって、回転子コイルエンド部４の外
形方向の変形を小さく抑えるためには、バインドコード
７の支持部間の距離Ｌを小さくするか、回転子コイル１
の断面二次モーメントＩを大きくすればよい。
【０００８】しかし、バインドコード７の支持部間の距
離Ｌを小さくするために、バインドコード７の支持点数
を増やすと、支えリング５の数が増え、これら支えリン
グ５を支えるステー８などの回転子端部構造が大形化し
てしまう。また、回転子コイル１の断面形状は、回転子
スロット内における電気的な設計条件からほぼ決められ
てしまうので、回転子コイルエンド部４の断面二次モー
メントＩに配慮する自由度は低い。
【０００９】本発明は上記のような点に鑑みなされたも
ので、大形可変速揚水発電機のような大径、高周速の回
転子コイルに作用する遠心力に対しても十分な信頼性を
確保することができる回転電機の回転子コイルを提供す
ることを目的とする。
【００１０】
【課題を解決するための手段】本発明の巻線形回転子コ
イルは、コイル直線部が回転子鉄心のスロット内に納め
られ、鉄心端部より外方に突出するコイルエンド部がバ
インドコードで支持固定され、回転子コイルの断面形状
をコイルエンド部の導体の半径方向断面二次モーメント
がコイル直線部の導体の半径方向断面二次モーメントよ
り大きくなるようにし、コイルエンド部におけるバイン
ドコード支持部間の曲げ変形を抑制することができる。
【００１１】
【作用】本発明の巻線形回転子コイルにおいては、コイ
ルエンド部の導体のみ断面二次モーメントを従来のもの
より大きくしたことで、コイルエンド部の径方向の剛性
を高めることができ、遠心力によるバインドコート支持
部間の径方向の曲げ変形を小さく抑え、絶縁層の損傷に
対する信頼性を高めることができ、また、コイル直線部
の導体の断面形状を従来のものと同じにすることで電気
的な設計条件を満足させることができる。
【００１２】
【実施例】以下本発明の実施例を図面を参照して説明す
る。
【００１３】なお、図１において図４と同一部材につい
ては同一符号を付す。
【００１４】図１ないし図３は本発明による巻線形回転
子コイルを示し、この巻線形回転子コイル１０は、回転
子鉄心１１に設けられた図示しない回転子スロットに納
められ、スロット楔により支持固定された基準線ｌに関
する断面二次モーメント、すなわち半径方向断面二次モ
ーメントの小さい導体１２と絶縁層１３からなるコイル
直線部１４と、基準線ｌに関する断面二次モーメント、
すなわち半径方向断面二次モーメントの大きい導体１５
と絶縁層１６からなるコイルエンド部１７とをスロット
出口付近で電気的、機械的に接続することで構成され
る。
【００１５】導体１２，１５の半径方向断面二次モーメ
ントＩは、導体の幅をｂ、導体の高さをｈとすると、Ｉ
＝ｂｈ3 ／１２で表される。半径方向断面二次モーメン
トＩを大きくするためには、コイルエンド部１７の導体
１５の高さをコイル直線部１４より大きくする。この
際、コイルエンド部１７の導体１５の幅を多少犠牲にし
てコイル直線部１４より小さくしても。導体１５の高さ
をコイル直線部１４より大きくすることで目的を達成で
きる。
【００１６】このように、コイルエンド部１７の導体１
５の半径方向断面二次モーメントを従来のものより大き
くすることにより、遠心力によるバインドコート７支持
部間のコイルエンド部１７の半径方向の曲げ変形を小さ
く抑えられるので、導体１５の絶縁層１６への応力集中
が緩和され、従来の絶縁層と同じ材質のものであって
も、より大径、高周速の回転子に適用することができ
る。コイル直線部３４は複数の素線からなるレーベル転
位導体で構成することもできる。
【００１７】しかして、コイルエンド部の導体のみ断面
二次モーメントを従来のものより大きくしたことで、コ
イルエンド部の半径方向の剛性を高めることができ、遠
心力によるバインドコート支持部間の径方向の曲げ変形
を小さく抑え、絶縁層の損傷に対する信頼性を高めるこ
とができる。
【００１８】また、コイル直線部の導体の断面形状を従
来のものと同じにすることで電気的な設計条件を満足さ
せることができる。
【００１９】
【発明の効果】以上述べたように本発明によれば、大形
可変速揚水発電機のような大径、高周速の回転子コイル
に作用する遠心力に対しても十分な信頼性を確保するこ
とができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine, and more particularly to a wound rotor coil incorporated in a variable speed pumped generator. 2. Description of the Related Art In a variable-speed pumping generator, a wound rotor coil is employed, so that a centrifugal force acting during operation is changed by a method different from that of a normal turbine generator. It is necessary to support and fix. [0003] Rotor coil 1 of conventional variable speed pumped generator
As shown in FIG. 4, a rotor coil 3 is inserted into a slot of the rotor core 2 and then fixed by a slot wedge (not shown), and protrudes outward from an end of the rotor core 2. The end portion 4 is provided between a support ring 5 connected and fixed to an end portion of the rotor core 2 and the rotor coil end portion 4.
Insulating spacers 6 are arranged between the rotor coil end portions 4 and the like, and the outer peripheral surfaces of the ends of the upper and lower rotor coil end portions 4 are made of nonmagnetic steel or glass fiber impregnated with a thermosetting resin. The bind cord 7 was wound and connected to be supported and fixed. The support ring 5 is supported by a stay 8. [0004] In the rotor coil having the above structure, the centrifugal force acting on the rotor coil end portion 4 during operation is supported by the bind cord 7 via the insulating spacer 6. The deformation of the portion of the rotor coil end portion 4 supported by the bind cord 7 in the outer shape direction due to the centrifugal force is extremely small. But,
The portion not supported by the bind cord 7 (the portion between the bind cords 7 of the rotor coil end portion 4) is deformed in the outer shape direction by centrifugal force because there is no support member. [0005] In the case of a large variable speed pumping generator having a large rotor diameter and a high peripheral speed, the centrifugal force acting on the rotor coil end portion 4 is large. The deformation of the child coil end portion 4 in the outer shape direction becomes large, and the insulating layer 9 applied to the rotor coil end portion 4 may be mechanically damaged. On the other hand, the radial bending deformation amount y of the rotor coil end portion 4 between the support portions of the bind cord 7 due to centrifugal force.
Is the centrifugal force acting per unit length of the rotor coil end portion 4, w is the distance between the support portions of the bind cord 7, L is the bending elastic modulus of the rotor coil end portion 4, E is the rotor coil end portion. Assuming that the second moment of area of 4 is I, y = 5WL 4 / (384EI). Therefore, in order to reduce the deformation of the rotor coil end portion 4 in the outer shape direction, the distance L between the support portions of the bind cord 7 must be reduced or the rotor coil 1
May be increased. However, when the number of support points of the bind cord 7 is increased in order to reduce the distance L between the support portions of the bind cord 7, the number of the support rings 5 is increased, and the rotation of the stay 8 and the like for supporting these support rings 5 is performed. The child end structure becomes large. In addition, since the cross-sectional shape of the rotor coil 1 is substantially determined from the electrical design conditions in the rotor slot, the degree of freedom in considering the second moment of area I of the rotor coil end portion 4 is low. The present invention has been made in view of the above points, and has a sufficient reliability with respect to a centrifugal force acting on a large-diameter, high-peripheral-speed rotor coil such as a large variable-speed pumping generator. It is an object of the present invention to provide a rotor coil of a rotating electric machine that can ensure the performance. [0010] In the wound type rotor coil of the present invention, a coil linear portion is accommodated in a slot of a rotor core, and a coil end portion protruding outward from an end of the core is bound. The rotor coil is supported and fixed, and the cross-sectional shape of the rotor coil is set such that the radial moment of inertia of the conductor in the coil end portion is larger than the radial moment of inertia of the conductor in the coil straight portion. Bending deformation between the support portions can be suppressed. In the wound rotor coil of the present invention, the radial rigidity of the coil end portion can be increased by increasing the second moment of area of only the conductor at the coil end portion as compared with the conventional one. In addition, the bending deformation in the radial direction between the bind coat supporting portions due to centrifugal force can be suppressed to be small, the reliability against the damage of the insulating layer can be increased, and the cross-sectional shape of the conductor of the coil straight portion is made the same as the conventional one As a result, electrical design conditions can be satisfied. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the same members as those in FIG. 4 are denoted by the same reference numerals. 1 to 3 show a wound rotor coil according to the present invention. The wound rotor coil 10 is accommodated in a rotor slot (not shown) provided in a rotor core 11 and supported by slot wedges. A second moment of area with respect to the fixed reference line l, that is, a coil straight portion 14 including the conductor 12 and the insulating layer 13 having a small second moment of area in the radial direction, a second moment of area with respect to the reference line l,
That is, the conductor 15 having a large second moment of area in the radial direction.
And the coil end portion 17 made of the insulating layer 16 are electrically and mechanically connected near the slot exit. The radial moment of inertia I in the radial direction of the conductors 12 and 15 is given by I, where b is the width of the conductor and h is the height of the conductor.
= Represented by bh 3/12. In order to increase the second moment of area I in the radial direction, the height of the conductor 15 of the coil end portion 17 is made larger than that of the coil straight portion 14. At this time, the width of the conductor 15 of the coil end portion 17 may be made smaller than the coil straight portion 14 at the expense of some. The object can be achieved by making the height of the conductor 15 larger than the coil straight portion 14. As described above, the conductor 1 of the coil end portion 17
By increasing the second moment of area in the radial direction of the coil 5 from the conventional one, the radial bending deformation of the coil end portion 17 between the support portions of the bind coat 7 due to the centrifugal force can be suppressed to a small value. Therefore, even if the insulating layer is made of the same material as the conventional insulating layer, it can be applied to a rotor having a larger diameter and a higher peripheral speed. The coil straight portion 34 may be formed of a label dislocation conductor composed of a plurality of strands. However, by increasing the second moment of area of only the conductor at the coil end portion as compared with the conventional one, the rigidity of the coil end portion in the radial direction can be increased, and the diameter between the bind coat supporting portions due to centrifugal force can be increased. The bending deformation in the direction can be suppressed small, and the reliability against damage to the insulating layer can be increased. Further, the electrical design conditions can be satisfied by making the cross-sectional shape of the conductor of the coil straight portion the same as the conventional one. As described above, according to the present invention, sufficient centrifugal force acting on a large-diameter, high-peripheral-speed rotor coil such as a large-sized variable-speed pumping generator can be obtained. Reliability can be ensured.
【図面の簡単な説明】
【図１】本発明による巻線形回転子コイルの一部断面
図。
【図２】図１のＡ−Ａ線に沿う矢視断面図。
【図３】図１のＢ−Ｂ線に沿う矢視断面図。
【図４】従来の巻線形回転子コイルの一部断面図。
【符号の説明】
５ 支えリング
６ 絶縁スペーサ
７ バインドコード
１０ 回転子コイル
１１ 回転子鉄心
１２ 導体
１３ 絶縁層
１４ コイル直線部
１５ 導体
１６ 絶縁層
１７ コイルエンド部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view of a wound rotor coil according to the present invention. FIG. 2 is a sectional view taken along the line AA of FIG. 1; FIG. 3 is a sectional view taken along the line BB of FIG. 1; FIG. 4 is a partial cross-sectional view of a conventional wound rotor coil. [Description of Signs] 5 Support ring 6 Insulating spacer 7 Bind cord 10 Rotor coil 11 Rotor iron core 12 Conductor 13 Insulating layer 14 Coil linear portion 15 Conductor 16 Insulating layer 17 Coil end portion
Claims (1)
納められ、鉄心端部より外方に突出するコイルエンド部
が複数のバインドコードで支持固定された巻線形回転子
において、回転子コイルの断面形状をコイルエンド部の
半径方向断面二次モーメントがコイル直線部の導体の半
径方向断面二次モーメントより大きくなるようにし、コ
イルエンド部におけるバインドコード支持部間の曲げ変
形を抑制したことを特徴とする巻線形回転子コイル。(57) [Claims 1] A coil linear portion is accommodated in a slot of a rotor core, and a coil end portion protruding outward from an end of the core is supported and fixed by a plurality of bind cords. In the wound rotor, the cross-sectional shape of the rotor coil is set such that the radial moment of inertia of the coil end portion is larger than the radial moment of inertia of the conductor of the coil straight portion, and the bind cord support portion at the coil end portion is formed. A winding-type rotor coil characterized in that bending deformation between the windings is suppressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21011194A JP3360949B2 (en) | 1994-09-02 | 1994-09-02 | Winding rotor coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21011194A JP3360949B2 (en) | 1994-09-02 | 1994-09-02 | Winding rotor coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0880004A JPH0880004A (en) | 1996-03-22 |
| JP3360949B2 true JP3360949B2 (en) | 2003-01-07 |
Family
ID=16583994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21011194A Expired - Lifetime JP3360949B2 (en) | 1994-09-02 | 1994-09-02 | Winding rotor coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3360949B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006081357A (en) * | 2004-09-13 | 2006-03-23 | Toshiba Mitsubishi-Electric Industrial System Corp | Rotor of winding induction machine |
-
1994
- 1994-09-02 JP JP21011194A patent/JP3360949B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0880004A (en) | 1996-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4421018B2 (en) | Slotless stator winding and manufacturing method thereof | |
| JP3971692B2 (en) | Slotless permanent magnet type rotating electrical machine and method for manufacturing windings thereof | |
| CN100588087C (en) | Single-phase induction motor | |
| US20090200889A1 (en) | Nested Serpentine Winding for an Axial Gap Electric Dynamo Machine | |
| JP3836608B2 (en) | AC alternator rotor for vehicles | |
| CN109478813B (en) | Axial gap type rotating electric machine | |
| US20040155552A1 (en) | Electric machine and method of making an electric machine | |
| JP3360949B2 (en) | Winding rotor coil | |
| JP2019149893A (en) | Stator for rotary electric machine | |
| JP6324180B2 (en) | Rotating electric machine or wind power generation system | |
| JP2006180678A (en) | Rotor and its winding method | |
| JP3362973B2 (en) | Winding rotor coil | |
| JP2000245120A (en) | Coil assembly for rotating electric machine and its manufacture | |
| JP2006081357A (en) | Rotor of winding induction machine | |
| US4377764A (en) | End winding support for exciter winding bar | |
| JPH1127879A (en) | Brushless dc motor | |
| JPS6255393B2 (en) | ||
| KR920003961Y1 (en) | Field coil bobbin | |
| JP3024902B2 (en) | Manufacturing method of motor stator | |
| JP3030162B2 (en) | Rotating electric machine and method of manufacturing the same | |
| JPH03285541A (en) | Capacitor induction motor | |
| JPS63129824A (en) | Armature winding for rotary electric machine | |
| KR0121984Y1 (en) | Electric motor of bobbin device | |
| JP2001136699A (en) | Brushless motor | |
| CN118017741A (en) | Axial flux motor coil assembly, stator, motor and stator preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081018 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081018 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091018 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101018 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111018 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111018 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121018 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131018 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term |