CH172839A - Device for cooling electrical machines with windings located in slots. - Google Patents
Device for cooling electrical machines with windings located in slots.Info
- Publication number
- CH172839A CH172839A CH172839DA CH172839A CH 172839 A CH172839 A CH 172839A CH 172839D A CH172839D A CH 172839DA CH 172839 A CH172839 A CH 172839A
- Authority
- CH
- Switzerland
- Prior art keywords
- frame
- coolant
- electrical machines
- groove
- slots
- Prior art date
Links
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
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
Description
Einrichtung zur Kühlung elektrischer Maschinen mit in Nuten liegenden Wicklungen. Die Kühlung der Nutenwicklungen elek trischer Maschinen ist in bedeutendem Masse beschränkt durch die notwendige Nutenisola tion. Es sind zwar schon Konstruktionen bekannt, welche die Leiter hohl ausbilden und das Kühlmittel durch diesen Hohlraum treiben. Jedoch ist die Anwendungsmöglich keit solcher Konstruktionen eine beschränkte; sie lassen sich im allgemeinen nur auf ein oder höchstens zwei Leiter pro Nut prak tisch mit Erfolg verwenden. Es ist deshalb schon vorgeschlagen worden, die Notenwick lungen durch einen Zwischenraum in zwei parallel laufende Pakete zu trennen.
Erfindungsgemäss erfolgt die Distanzierung der beiden Pakete durch wenigstens einen isolierten Rahmen, der einem in der Noten längsrichtung fliessenden Kühlmittel den Durch tritt gestattet: Die beiliegende Zeichnung zeigt schema tisch drei Ausführungsbeispiele des Erfindungs gegenstandes.
1 ist der Eisenkörper mit der ausgespar ten Wicklungsnut; 2 sind die beiden Lei- terpakete, welche unter Zwischenlage der Isolation 3 an den Seitenwänden der Nut anlie gen. 4 ist ein Rahmen, welcher mit einer Isola tion 5 versehen ist und die beiden Leiterpakete an die Nutenwandung anpresst. Der Rahmen 4, der aus Metall und mehreren Einzelstük- ken bestehen kann, wird am besten als ver steifter Rahmen ausgebildet (Fix. l), der dem Kühlmittel möglichst freien Durchlass ge währt. Dem gleichen Zwecke dient das Ein lassen des Rahmens 4 in Aussparungen der Leiterpakete gemäss dem Beispiel Fig. 2, die eine Draufsicht der beiden Notenpakete 2, Richtung Notentiefe, und den Rahmen 4 im Querschnitt zeigt.
Da die Rahmen 4 nur in grösseren Abständen vorhanden sein müssen, ist die Querschnittsverminderung der Leiter 2 an den betreffenden Stellen nur von ge ringem Einfloss. Das Kühlmittel kann ent weder axial durch die ganze Nut geführt werden, oder es kann an passenden Stellen durch Öffnungen 6 in den Nutenabschluss- organen abgeführt werden.
Da das Kühlmittel in direkte Berührung mit dem Metall der Nutenleiter gebracht wird, so wird dasselbe den grössten Teil der in den Leitern entstehenden Verlustwärme, ohne durch ein Temperaturgefälle infolge einer Isolierschicht behindert zu sein, direkt abführen, während ein Rest dieser Verlust wärme noch durch die Nutenisolation an den Eisenkörper gelangen kann. Man erhält somit gegenüber der gebräuchlichen Anordnung, bei der die ganze Verlustwärme durch die Nuten isolation zum Eisenkörper fliessen muss, eine sehr wirksame innere Abkühlung in der Nu tenmitte.
Fig. 3 zeigt die bekannte Anwendung eines ergänzenden Kanals 7 im Nutengrund. Derselbe steht mit dem Hohlraum in der Nut in Verbindung und bezweckt einesteils eine erleichterte Zufuhr des Kühlmittels in den Nutenhohlraum, andernteils verbessert er noch die Ableitung der durch die Nutenisolation an den Eisenkörper ausströmenden Verlust wärme.
Device for cooling electrical machines with windings located in slots. The cooling of the slot windings of electrical machines is limited to a significant extent by the necessary slot insulation. Although there are already known constructions which form the conductors hollow and drive the coolant through this cavity. However, the possible application of such constructions is limited; they can generally only be used in practice with success on one or at most two conductors per groove. It has therefore already been proposed to separate the note windings by a space in two parallel running packages.
According to the invention, the two packets are separated by at least one insulated frame that allows a coolant flowing in the longitudinal direction of the notes to pass through: The accompanying drawing shows schematically three exemplary embodiments of the subject of the invention.
1 is the iron body with the recessed winding groove; 2 are the two conductor packages, which lie against the side walls of the groove with the insulation 3 in between. 4 is a frame which is provided with an insulation 5 and presses the two conductor packages against the wall of the groove. The frame 4, which can consist of metal and several individual pieces, is best designed as a stiffened frame (Fix. 1), which allows the coolant to pass through as freely as possible. The same purpose is used to let the frame 4 in recesses in the conductor packets according to the example of FIG. 2, which shows a top view of the two packets of notes 2, in the direction of the note depth, and the frame 4 in cross section.
Since the frame 4 only need to be present at greater intervals, the cross-sectional reduction of the head 2 at the points concerned is only of ge ringem inflow. The coolant can either be guided axially through the entire groove, or it can be discharged at suitable points through openings 6 in the groove closure members.
Since the coolant is brought into direct contact with the metal of the slot conductors, it will dissipate most of the heat lost in the conductors without being hindered by a temperature gradient due to an insulating layer, while the rest of this heat loss is still through the Groove insulation can get to the iron body. Compared to the conventional arrangement, in which all of the heat loss has to flow through the groove insulation to the iron body, a very effective internal cooling is obtained in the middle of the groove.
Fig. 3 shows the known use of a supplementary channel 7 in the groove base. The same is connected to the cavity in the groove and aims on the one hand to facilitate the supply of coolant into the groove cavity, on the other hand it improves the dissipation of the heat loss flowing through the groove insulation to the iron body.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH172839T | 1933-10-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172839A true CH172839A (en) | 1934-10-31 |
Family
ID=4424196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172839D CH172839A (en) | 1933-10-24 | 1933-10-24 | Device for cooling electrical machines with windings located in slots. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172839A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2695368A (en) * | 1953-01-27 | 1954-11-23 | Gen Electric | Dynamoelectric machine stator winding with fluid-cooling passages in conductor bars |
US2722616A (en) * | 1952-04-18 | 1955-11-01 | Westinghouse Electric Corp | Evaporative cooling system for dynamo-electric machines |
DE948714C (en) * | 1951-09-28 | 1956-09-06 | Westinghouse Electric Corp | Device for cooling the stator windings of high-voltage, high-performance turbo generators |
US2780739A (en) * | 1951-09-28 | 1957-02-05 | Westinghouse Electric Corp | Conductor-ventilated turbinegenerators |
DE1013771B (en) * | 1951-09-28 | 1957-08-14 | Westinghouse Electric Corp | Gas-cooled dynamo-electric machine |
DE1014216B (en) * | 1952-06-20 | 1957-08-22 | Allis Chalmers Mfg Co | Gas-cooled dynamo machine |
DE1014640B (en) * | 1951-12-12 | 1957-08-29 | Vickers Electrical Co Ltd | Stator winding of dynamo-electric machines |
DE1015528B (en) * | 1954-08-09 | 1957-09-12 | Siemens Ag | Cooling arrangement for the rotor winding of turbo generators |
DE1020408B (en) * | 1953-01-27 | 1957-12-05 | Gen Electric | Device for the coolant supply in dynamo-electric machines |
DE1032382B (en) * | 1955-05-26 | 1958-06-19 | Siemens Ag | Cooling arrangement for the excitation winding of turbo generators equipped with waveguides |
DE1044248B (en) * | 1956-03-08 | 1958-11-20 | Licentia Gmbh | Winding bar for electrical machines with direct conductor cooling |
US2920219A (en) * | 1952-12-13 | 1960-01-05 | Allis Chalmers Mfg Co | Dynamoelectric machine with gas cooled rotor and stator conductors |
DE973696C (en) * | 1954-02-24 | 1960-05-05 | Siemens Ag | Bars for electrical machines |
DE975389C (en) * | 1954-05-01 | 1961-11-16 | Siemens Ag | Bars for electrical machines |
DE19749316A1 (en) * | 1997-11-07 | 1999-05-12 | Abb Patent Gmbh | Gas-cooled turbogenerator |
EP4106152A1 (en) * | 2021-06-17 | 2022-12-21 | General Electric Company | Magnetic mass for a rotor, associated rotor and rotating electric machine |
-
1933
- 1933-10-24 CH CH172839D patent/CH172839A/en unknown
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE948714C (en) * | 1951-09-28 | 1956-09-06 | Westinghouse Electric Corp | Device for cooling the stator windings of high-voltage, high-performance turbo generators |
US2780739A (en) * | 1951-09-28 | 1957-02-05 | Westinghouse Electric Corp | Conductor-ventilated turbinegenerators |
DE1013771B (en) * | 1951-09-28 | 1957-08-14 | Westinghouse Electric Corp | Gas-cooled dynamo-electric machine |
DE1014640B (en) * | 1951-12-12 | 1957-08-29 | Vickers Electrical Co Ltd | Stator winding of dynamo-electric machines |
US2722616A (en) * | 1952-04-18 | 1955-11-01 | Westinghouse Electric Corp | Evaporative cooling system for dynamo-electric machines |
DE1014216B (en) * | 1952-06-20 | 1957-08-22 | Allis Chalmers Mfg Co | Gas-cooled dynamo machine |
US2920219A (en) * | 1952-12-13 | 1960-01-05 | Allis Chalmers Mfg Co | Dynamoelectric machine with gas cooled rotor and stator conductors |
DE1020408B (en) * | 1953-01-27 | 1957-12-05 | Gen Electric | Device for the coolant supply in dynamo-electric machines |
US2695368A (en) * | 1953-01-27 | 1954-11-23 | Gen Electric | Dynamoelectric machine stator winding with fluid-cooling passages in conductor bars |
DE973696C (en) * | 1954-02-24 | 1960-05-05 | Siemens Ag | Bars for electrical machines |
DE975389C (en) * | 1954-05-01 | 1961-11-16 | Siemens Ag | Bars for electrical machines |
DE1015528B (en) * | 1954-08-09 | 1957-09-12 | Siemens Ag | Cooling arrangement for the rotor winding of turbo generators |
DE1032382B (en) * | 1955-05-26 | 1958-06-19 | Siemens Ag | Cooling arrangement for the excitation winding of turbo generators equipped with waveguides |
DE1044248B (en) * | 1956-03-08 | 1958-11-20 | Licentia Gmbh | Winding bar for electrical machines with direct conductor cooling |
DE19749316A1 (en) * | 1997-11-07 | 1999-05-12 | Abb Patent Gmbh | Gas-cooled turbogenerator |
EP4106152A1 (en) * | 2021-06-17 | 2022-12-21 | General Electric Company | Magnetic mass for a rotor, associated rotor and rotating electric machine |
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