JPH0534893B2 - - Google Patents
Info
- Publication number
- JPH0534893B2 JPH0534893B2 JP3901084A JP3901084A JPH0534893B2 JP H0534893 B2 JPH0534893 B2 JP H0534893B2 JP 3901084 A JP3901084 A JP 3901084A JP 3901084 A JP3901084 A JP 3901084A JP H0534893 B2 JPH0534893 B2 JP H0534893B2
- Authority
- JP
- Japan
- Prior art keywords
- stator
- rotor
- hollow
- stator winding
- holes
- 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
- 238000004804 winding Methods 0.000 claims description 39
- 239000003507 refrigerant Substances 0.000 claims description 10
- 230000004907 flux Effects 0.000 description 15
- 239000000498 cooling water Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/22—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of hollow conductors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は回転電機の固定子に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a stator for a rotating electric machine.
第１図にはタービン発電機の従来例が示されて
いる。同図に示されているように発電機は固定子
および回転子１から構成され、固定子は固定子鉄
心２に収納され、かつこの固定子鉄心２からその
端部が軸方向に突出している固定子巻線３から構
成されている。そしてこの固定子巻線３は冷媒を
流流通させる孔を有する複数の中空素線（図示せ
ず）が幅方向と高さ方向とに積層して形成され、
かつ幅方向には少なくとも２列以上配列されてい
る。なお同図において４はダクト、５は回転子巻
線である。
FIG. 1 shows a conventional example of a turbine generator. As shown in the figure, the generator is composed of a stator and a rotor 1, the stator is housed in a stator core 2, and its ends protrude from the stator core 2 in the axial direction. It is composed of stator windings 3. The stator winding 3 is formed by stacking a plurality of hollow strands (not shown) in the width direction and height direction, each having a hole through which a refrigerant flows.
And they are arranged in at least two rows in the width direction. In the figure, 4 is a duct, and 5 is a rotor winding.
このように構成されたタービン発電機の固定子
鉄心２の端部では、磁束の発生状況および半径方
向磁束密度と固定子巻線エンド部位置との関係が
示されている第２図のように、固定子巻線３およ
び回転子巻線５のつくる磁束Ｇによつて固定子鉄
心２の端部に磁束Ｇの集中がおこる。この磁束Ｇ
の大きさは図中点線表示の曲線Ｐのように発電機
の三相短絡時と図中実線表示の曲線Ｑのように定
格負荷時とでは大きく異なり、定格負荷時の方が
固定子巻線３の端部に集中する磁束密度が増して
いる。このように定格負荷時の方が固定子巻線３
の端部に集中する磁束Ｇが増すので、縦軸に固定
子巻線３をとり、横軸に素線電流をとつて固定子
巻線３の素線電流の変化が示されている第３図に
示されているように、固定子巻線３の各中空素線
（孔は図示せず）間に起電力を誘発し、この起電
力に基づく循環電流によつて各中空素線の電流分
布を不均一にしている。このため工場で三相短絡
試験を実施しても現地の据付状態で定格負荷をと
ると、この各中空素線の電流分布の不均一成分に
よつて固定子巻線３が部分的に温度が上り、この
温度が上つた部分の絶縁物を損傷する恐れがあつ
た。 At the end of the stator core 2 of the turbine generator configured in this way, the situation of magnetic flux generation and the relationship between the radial magnetic flux density and the stator winding end position are shown in Figure 2. , magnetic flux G generated by stator winding 3 and rotor winding 5 causes concentration of magnetic flux G at the end of stator core 2 . This magnetic flux G
The magnitude of is significantly different between when the three phases of the generator are shorted, as shown by the dotted curve P in the figure, and when the generator is at the rated load, as shown by the solid line curve Q in the figure. The magnetic flux density concentrated at the end of 3 is increasing. In this way, when the rated load is applied, the stator winding 3
Since the magnetic flux G concentrated at the end of the stator winding 3 increases, the stator winding 3 is plotted on the vertical axis and the wire current is plotted on the horizontal axis. As shown in the figure, an electromotive force is induced between each hollow strand (holes not shown) of the stator winding 3, and a circulating current based on this electromotive force causes a current in each hollow strand. The distribution is uneven. Therefore, even if a three-phase short circuit test is performed at the factory, if the rated load is applied in the installed state at the site, the temperature of the stator winding 3 will partially rise due to the non-uniform component of the current distribution of each hollow strand. There was a risk of damaging the insulation in the area where the temperature rose.
本発明は以上の点に鑑みなされたものであり、
固定子巻線の温度上昇を均一にすることを可能と
した回転電機の固定子を提供することを目的とす
るものである。
The present invention has been made in view of the above points,
It is an object of the present invention to provide a stator for a rotating electric machine that makes it possible to uniformly increase the temperature of the stator windings.
すなわち本発明は回転子に対向配置された固定
子鉄心と、この固定子鉄心に収納され、かつその
端部が前記固定子鉄心から軸方向に突出した固定
子巻線とを備え、前記固定子巻線は冷媒を流通さ
せる孔を有する複数の中空素線が幅方向と高さ方
向との積層され、かつ前記幅方向には少なくとも
２列以上配列されている回転電機の固定子におい
て、前記固定子巻線を、前記回転子が回転する側
で、かつ前記幅方向の少なくとも半数の列の前記
中空素線の全部もしくは一部の孔をこの他の中空
素線の孔より大きくしたことを特徴とするもので
あり、これによつて回転子が回転する側の中空素
線の全部または一部に流通する冷媒量がこの他の
中空素線に流通する冷媒量より多くなる。
That is, the present invention includes a stator core arranged to face a rotor, and a stator winding that is housed in the stator core and whose end portion protrudes in the axial direction from the stator core. In a stator of a rotating electric machine, the winding is a plurality of hollow strands having holes through which a refrigerant flows, stacked in the width direction and height direction, and arranged in at least two rows in the width direction. The child winding is characterized in that all or some of the holes in the hollow strands in at least half of the rows in the width direction on the side where the rotor rotates are made larger than the holes in other hollow strands. As a result, the amount of refrigerant flowing through all or part of the hollow strands on the side where the rotor rotates becomes larger than the amount of refrigerant flowing through the other hollow strands.
発明者はどのようにすれば固定子巻線の温度上
昇を均一にすることができるかを検討した。第４
図には固定子巻線の従来例が示されている。同図
に示されているように中空素線６は冷媒を流通さ
せる孔７が設けられているが、従来はこの孔７の
大きさが全部同じであつた。この場合に第５図に
示されているように半径方向の磁束ΦRと接線方
向の磁束ΦTとにより各素線間にiR1，iR2，iTなる
循環電流が流れ、iR1，iR2，iTが同方向に流れる
Ａの１，２，３，４の部分が上述の第３図に示さ
れているように素線電流が増加する。この素線電
流が大きく温度の高い部分は半径方向の磁束ΦR
と接線方向の磁束ΦTとの方向によつて決まり、
接線方向の磁束ΦTは回転子の回転方向によつて
決まり、半径方向の磁束ΦRは回転子内周側から
くるので、この位置は回転子の回転側の列でしか
も回転子側に近い固定子巻線である。従つてこの
回転子の回転側の固定子巻線の中空素線の温度上
昇を抑制すればよく、それにはこの回転子の回転
側の中空素線の孔をこの他の部分の孔より大きく
しやれば、この大きくした孔に流れる冷媒量が多
くなつてよく冷却されるようになり、中空素線の
局部的温度上昇が抑制でき、固定子巻線の温度上
昇が均一化できることが確かめられた。そこで本
発明では固定子巻線を、回転子が回転する側で、
かつ幅方向の少なくとも半数の列の中空素線の全
部もしくは一部の孔をこの他の中空素線の孔より
大きくした。このようにすることにより固定子巻
線の温度上昇を均一にすることを可能とした回転
電機の固定子を得ることを可能としたものであ
る。 The inventor studied how to make the temperature rise of the stator winding uniform. Fourth
The figure shows a conventional example of a stator winding. As shown in the figure, the hollow strand 6 is provided with holes 7 through which the refrigerant flows, but conventionally, the holes 7 have all been of the same size. In this case, as shown in FIG. 5, circulating currents iR 1 , iR 2 , i T flow between each strand due to the radial magnetic flux Φ R and the tangential magnetic flux Φ T , and iR 1 , In the portions 1, 2, 3, and 4 of A where iR 2 and i T flow in the same direction, the wire current increases as shown in FIG. 3 above. The part where the wire current is large and the temperature is high is the magnetic flux Φ R in the radial direction.
and the direction of the tangential magnetic flux Φ T ,
The tangential magnetic flux Φ T is determined by the rotation direction of the rotor, and the radial magnetic flux Φ R comes from the inner circumferential side of the rotor, so this position is in the row on the rotating side of the rotor and close to the rotor side. This is the stator winding. Therefore, it is only necessary to suppress the temperature rise in the hollow strands of the stator winding on the rotating side of the rotor, and this can be done by making the holes in the hollow strands on the rotating side of the rotor larger than the holes in other parts. It was confirmed that if this was done, the amount of refrigerant flowing through these enlarged holes would increase, resulting in better cooling, suppressing local temperature rises in the hollow strands, and evening out the temperature rise in the stator windings. . Therefore, in the present invention, the stator winding is arranged on the side where the rotor rotates.
In addition, all or some of the holes in at least half of the rows in the width direction of the hollow wires were made larger than the holes in the other hollow wires. By doing so, it is possible to obtain a stator for a rotating electrical machine that makes it possible to make the temperature rise of the stator windings uniform.
以下、図示した実施例に基づいて本発明を説明
する。第６図には本発明の一実施例が示されてい
る。なお従来と同じ部品には同じ符号を付したの
で説明を省略する。本実施例では固定子巻線３ａ
を、回転子が回転する側で、かつ幅方向の２列の
中空素線．ａの孔８を、この他の中空素線６ａの
孔９より大きくした。このようにすることにより
孔８を大きくした回転子が回転する側の中空素線
６ａに流通する冷媒量が孔８より小さい孔９を有
するこの他の中空素線６ａに流通する冷媒量より
多くなつて、固定子巻線３ａの温度上昇を均一に
することを可能とした回転電機の固定子を得るこ
とができる。
The present invention will be explained below based on the illustrated embodiments. FIG. 6 shows an embodiment of the invention. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, stator winding 3a
, two rows of hollow strands in the width direction on the side where the rotor rotates. The hole 8 of a is made larger than the hole 9 of the other hollow strand 6a. By doing this, the amount of refrigerant flowing through the hollow strand 6a on the side where the rotor rotates with the holes 8 enlarged is greater than the amount of refrigerant flowing through the other hollow strand 6a having the hole 9 smaller than the hole 8. As a result, it is possible to obtain a stator for a rotating electrical machine that makes it possible to uniformly increase the temperature of the stator winding 3a.
すなわち回転子側に近い固定子巻線３ａの、回
転子の回転側の列の中空素線６ａの孔８をこの他
の中空素線６ａの孔９より大きくした。このよう
にすることにより回転子の回転側の固定子巻線３
ａの中空素線６ａに流れる冷媒量例えば冷却水量
が多くなつて、よく冷却されるようになり、回転
子の回転側の中空素線６ａの局部的温度上昇を抑
制することができる。 That is, in the stator winding 3a near the rotor, the holes 8 of the hollow strands 6a in the row on the rotation side of the rotor are made larger than the holes 9 of the other hollow strands 6a. By doing this, the stator winding 3 on the rotating side of the rotor
The amount of refrigerant, for example, the amount of cooling water, flowing through the hollow strands 6a of the rotor a increases, resulting in better cooling, and it is possible to suppress a local temperature rise in the hollow strands 6a on the rotating side of the rotor.
なお本実施例では固定子巻線３ａの回転子が回
転する側で、かつ幅方向の２列の中空素線６ａ全
部の孔８を大きくしたが、これのみに限るもので
はなく部分的に温度が高くなる中空素線６ａのみ
その孔を大きくするようにしてもよい。このよう
にすることにより全体の孔を大きくした場合に、
中空素線６ａの銅の面積が減少し中空素線６ａに
発生する損失が増加することや必要冷却水量の増
加することが防止でき、全体の損失、冷却水量が
低減できる。 In this embodiment, the holes 8 in all the hollow strands 6a in two rows in the width direction on the side where the rotor of the stator winding 3a rotates are enlarged, but this is not limited to only this, and some parts may be heated. The hole may be made larger only in the hollow strand 6a where the height is higher. By doing this, when the overall hole is enlarged,
The copper area of the hollow strand 6a is reduced, and it is possible to prevent an increase in the loss occurring in the hollow strand 6a and an increase in the required amount of cooling water, and the overall loss and amount of cooling water can be reduced.
上述のように本発明は固定子巻線の、回転子の
回転側の中空素線の局部的温度上昇が抑制される
ようになつて、固定子巻線の温度上昇を均一にす
ることができるようになり、固定子巻線の温度上
昇を均一にすることを可能とした回転電機の固定
子を得ることができる。
As described above, the present invention suppresses the local temperature rise of the hollow strands of the stator winding on the rotating side of the rotor, thereby making it possible to make the temperature rise of the stator winding uniform. As a result, it is possible to obtain a stator for a rotating electrical machine that makes it possible to make the temperature rise of the stator windings uniform.
第１図は従来の回転電機の固定子によるタービ
ン発電機要部の縦断側面図、第２図は従来の回転
電機の固定子によるタービン発電機の運転状態と
固定子巻線上の磁束密度とを示す説明図、第３図
は従来の回転電機の固定子の固定子巻線の素線の
電流分布を示す説明図、第４図は従来の回転電機
の固定子の固定子巻線の縦断側面図、第５図は従
来の回転電機の固定子の固定子巻線の磁束方向に
よる循環電流の流れを示す説明図、第６図は本発
明の回転電機の固定子の一実施例の固定子巻線の
縦断側面図である。
１…回転子、２…固定子鉄心、３ａ…固定子巻
線、６ａ…中空素線、８…中空素線の孔で大きく
した孔、９…中空素線の孔で孔８より小さい孔。
Fig. 1 is a vertical cross-sectional side view of the main part of a turbine generator using the stator of a conventional rotating electric machine, and Fig. 2 shows the operating state of the turbine generator using the stator of a conventional rotating electric machine and the magnetic flux density on the stator winding. 3 is an explanatory diagram showing the current distribution of the strands of the stator winding of the stator of a conventional rotating electrical machine. FIG. 4 is a longitudinal cross-sectional side view of the stator winding of the stator of a conventional rotating electrical machine. 5 is an explanatory diagram showing the flow of circulating current according to the magnetic flux direction of the stator winding of the stator of a conventional rotating electrical machine, and FIG. 6 is a stator of an embodiment of the stator of the rotating electrical machine of the present invention. FIG. 3 is a longitudinal cross-sectional side view of the winding. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Stator core, 3a... Stator winding, 6a... Hollow wire, 8... Hole made larger by the hole of the hollow wire, 9... Hole smaller than hole 8 in the hollow wire.
Claims (1)
固定子鉄心に収納され、かつその端部が前記固定
子鉄心から軸方向に突出した固定子巻線とを備
え、前記固定子巻線は冷媒を流通させる孔を有す
る複数の中空素線が幅方向と高さ方向とに積層さ
れ、かつ前記幅方向には少なくとも２列以上配列
されている回転電機の固定子において、前記固定
子巻線を、前記回転子が回転する側で、かつ前記
幅方向の少なくとも半数の列の前記中空素線の全
部もしくは一部の孔をこの他の前記中空素線の孔
より大きくしたことを特徴とする回転電機の固定
子。1. A stator core disposed opposite to a rotor, and a stator winding housed in the stator core and having an end thereof protruding in the axial direction from the stator core, the stator winding comprising: In a stator for a rotating electric machine, in which a plurality of hollow strands having holes through which a refrigerant flows are stacked in the width direction and height direction, and are arranged in at least two rows or more in the width direction, the stator winding characterized in that all or some of the holes in the hollow strands in at least half of the rows in the width direction on the side where the rotor rotates are larger than the holes in the other hollow strands. Stator of rotating electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3901084A JPS60183947A (en) | 1984-02-29 | 1984-02-29 | Stator of rotary electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3901084A JPS60183947A (en) | 1984-02-29 | 1984-02-29 | Stator of rotary electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60183947A JPS60183947A (en) | 1985-09-19 |
| JPH0534893B2 true JPH0534893B2 (en) | 1993-05-25 |
Family
ID=12541133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3901084A Granted JPS60183947A (en) | 1984-02-29 | 1984-02-29 | Stator of rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60183947A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005160261A (en) * | 2003-11-28 | 2005-06-16 | Hitachi Ltd | Armature winding and rotating electric machine using same |
-
1984
- 1984-02-29 JP JP3901084A patent/JPS60183947A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60183947A (en) | 1985-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3474660B2 (en) | 3 phase motor | |
| JP6035146B2 (en) | Superconducting generator and wind turbine equipped with superconducting generator | |
| US7989996B2 (en) | Five-phase generator | |
| US4217511A (en) | Stator core cooling for dynamoelectric machines | |
| JPWO2010047173A1 (en) | Cage type induction motor and cage type induction motor drive system | |
| US3335308A (en) | Dynamoelectric machine having means for reducing torque and inrush current | |
| JP3578939B2 (en) | Winding method of rotating electric machine and rotating electric machine | |
| US3463952A (en) | Cooling ducts for field coils | |
| JPH0534893B2 (en) | ||
| CN110867994B (en) | Rotating electrical machine | |
| CN114079343B (en) | Stator assembly and motor with same | |
| JP2702788B2 (en) | Motor stator core | |
| US2773208A (en) | Ring winding for electrical machines | |
| US2260833A (en) | Cooling means for electrical induction apparatus | |
| KR101954946B1 (en) | Coil winding structure of stator with 24 slots | |
| JPS6310660B2 (en) | ||
| JP3812782B2 (en) | Three-phase AC generator for vehicles | |
| JPH10164787A (en) | Salient-type rotor in dynamo-electric machine | |
| JPS594932B2 (en) | Conductor of rotating electric machine | |
| Lynn | Effects of temperature on mechanical performance of rotating electrical machinery | |
| JPH03261340A (en) | Rotor for electric rotating machine | |
| JP2002252948A (en) | Salient pole rotor of rota dynamo electric machine | |
| JP2002078265A (en) | Rotary electric machine | |
| CN116865476A (en) | Gradient insulation litz wire, high-speed permanent magnet motor stator, motor and method | |
| JPS59198868A (en) | Rotor of superconductive rotary electric machine |