CH99387A - Cooling device for slot windings in electrical machines. - Google Patents
Cooling device for slot windings in electrical machines.Info
- Publication number
- CH99387A CH99387A CH99387DA CH99387A CH 99387 A CH99387 A CH 99387A CH 99387D A CH99387D A CH 99387DA CH 99387 A CH99387 A CH 99387A
- Authority
- CH
- Switzerland
- Prior art keywords
- cooling device
- electrical machines
- conductors
- cooling
- slot
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Description
Kühleinrichtung für Nutenwicklungen elektrischer Maschinen. Es ist bekannt bei elektrischen Maschinen und Apparaten die Leiter dadurch zu kühlen, dass man letztere als Röhren ausbildet, und das Kühlmittel (Luft, Öl, Wasser usw.) durch diese hindurchtreibt. Bei elektrischen Ma schinen lässt sich diese Art der Kühlung ver hältnismässig leicht bewerkstelligen, wenn die Leiterzahl pro Nut eine beschränkte, und die Wicklung als sogenannte Stabwicklung aus geführt ist. Besteht zum Beispiel die Stab wicklung aus ein bis zwei Stäben pro Nut mit besonderen Stirnverbindungen, so kann man diese Nutenstäbe hohl ausbilden, und durch die Höhlung, die beidseitig frei aus mündet, das Kühlmittel treiben. Da, wo aber sogenannte Spulenwicklungen mit geschlos senen Windungen gewählt werden, ist die Ausführung von hohlen Leitern nicht mehr möglich.
Der Gegenstand vorliegender Erfindung gestattet nun, diese äusserst wirksame Kühlung auch für Spulen mit geschlossenen Windun gen anzuwenden. Die Fig. 1 und 2 zeigen im Quer- und im Längsschnitt durch eine Nut eine beispielsweise Ausführung einer Kühl- einrichtung gemäss Erfindung. a sind die in den Nuten liegenden Leiterteile einer Spule mit mehreren Windungen. An die Teile a schliessen sich auf ihrer ganzen Länge me tallische Röhren b dicht an, während die Lei terisolation c den Leiter und die Kühlröhre einschliesst; d ist die Nutenisolation. Die Wärme muss nun nicht mehr durch diese hin durch mit bedeutendem Wärmegefälle an die Nutenwandung abgegeben werden, sondern wird von jedem einzelnen Leiter oder Gruppen.
von benachbarten Leitern unmittelbar durch das mit dem betreffenden Leiter a in Wärme gut leitendem Kontakt befindliche Kühlrohr, in welchem das Kühlmittel fliesst, an letzteres abgegeben. Die Kühlröhren münden an bei den Enden der Nutenisolation zwischen den hier noch gut distanzierten Leitern a aus. Das Kühlmittel kann an diesen Stellen be quem ein- und austreten. Die Spulenköpfe können entweder als Ganzes isoliert sein oder zwischen den Einzelleitern ebenfalls leere Zwischenräume aufweisen, damit die Leiter allseitig vom Kühlmittel umspült werden.
Eine Wärme gut leitender Ko-ntakt zwischen Leiter und Kühlröhre wird zweckmässig durch Verlöten der beiden an einzelnen Stellen oder auf der ganzen Länge hergestellt, wodurch auch eine Beteiligung der Kühlröhren an der Stromleitung erreicht werden kann. Da, wo bei grösserer Leiterzahl pro Spule die Unter bringung der Kühlröhre an jedem Leiter zu viel Raum beanspruchen würde, können die Kühlröhren zum Beispiel nur an jedem zwei ten oder dritten Leiter angebracht werden (Fig. 3).
Die Wärme der nicht unmittelbar mit einer Kühlröhre verbundenen Leiter muss dann nur durch die dünne Isolation der Ein zelleiter hindurch an unmittelbar gekühlte Leiter oder an die Kühlröhren geleitet werden, anstatt nach bisherigen Ausführungen durch die dicke Nutenisolation an das Ankereisen, welches auch schon eine beträchtliche Erwär mung aufweist. An Stelle von Kühlröhren können am Umfang offene oder geschlossene Kanäle irgendwelcher Form verwendet werden.
Cooling device for slot windings in electrical machines. It is known to cool the conductors in electrical machines and apparatus by forming the latter as tubes and driving the coolant (air, oil, water, etc.) through them. With electrical machines, this type of cooling can be achieved relatively easily if the number of conductors per slot is limited and the winding is designed as a so-called bar winding. If, for example, the rod winding consists of one or two rods per groove with special end connections, these grooved rods can be made hollow and the coolant can be driven through the cavity that opens out freely on both sides. But where so-called coil windings with closed turns are selected, the execution of hollow conductors is no longer possible.
The subject matter of the present invention now allows this extremely effective cooling to be used for coils with closed turns. 1 and 2 show, in transverse and longitudinal sections through a groove, an exemplary embodiment of a cooling device according to the invention. a are the conductor parts of a coil with several turns lying in the slots. At the parts a close metal tubes b tightly along their entire length, while the Lei terisolation c includes the conductor and the cooling tube; d is the slot insulation. The heat no longer has to be given off through this through with a significant heat gradient to the groove wall, but is from each individual conductor or group.
from adjacent conductors directly through the cooling tube which is in good thermal conductivity contact with the relevant conductor a and in which the coolant flows to the latter. The cooling tubes open out at the ends of the slot insulation between the conductors a, which are still well spaced here. The coolant can comfortably enter and exit at these points. The coil heads can either be insulated as a whole or also have empty spaces between the individual conductors so that the coolant flows around the conductors on all sides.
A good heat-conducting contact between the conductor and the cooling tube is expediently established by soldering the two at individual points or over the entire length, whereby the cooling tubes can also participate in the power line. There, where with a larger number of conductors per coil, the placement of the cooling tube on each conductor would take up too much space, the cooling tubes can, for example, only be attached to every second or third conductor (Fig. 3).
The heat from the conductors that are not directly connected to a cooling tube then only has to be conducted through the thin insulation of the single conductor to directly cooled conductors or to the cooling tubes, instead of through the thick groove insulation to the anchor iron, which is already a considerable amount of heat showing. Instead of cooling tubes, open or closed channels of any shape can be used on the circumference.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH99387T | 1921-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH99387A true CH99387A (en) | 1923-05-16 |
Family
ID=4357300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH99387D CH99387A (en) | 1921-12-24 | 1921-12-24 | Cooling device for slot windings in electrical machines. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH99387A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE939392C (en) * | 1951-04-28 | 1956-02-23 | Demag Zug Gmbh | Roller table motor |
DE948714C (en) * | 1951-09-28 | 1956-09-06 | Westinghouse Electric Corp | Device for cooling the stator windings of high-voltage, high-performance turbo generators |
DE951514C (en) * | 1952-07-26 | 1956-10-31 | Westinghouse Electric Corp | Cooling dynamo-electric machines |
DE1013771B (en) * | 1951-09-28 | 1957-08-14 | Westinghouse Electric Corp | Gas-cooled dynamo-electric machine |
DE1014215B (en) * | 1952-03-10 | 1957-08-22 | Licentia Gmbh | Liquid-cooled rotor winding for electrical machines |
DE1014640B (en) * | 1951-12-12 | 1957-08-29 | Vickers Electrical Co Ltd | Stator winding of dynamo-electric machines |
DE1020408B (en) * | 1953-01-27 | 1957-12-05 | Gen Electric | Device for the coolant supply in dynamo-electric machines |
DE975389C (en) * | 1954-05-01 | 1961-11-16 | Siemens Ag | Bars for electrical machines |
DE1202411B (en) * | 1955-05-18 | 1965-10-07 | Asea Ab | Cooling device for electrical agitator windings of melting furnaces |
DE19623553A1 (en) * | 1996-06-13 | 1997-12-18 | Klein Schanzlin & Becker Ag | Liquid-filled underwater motor |
DE102021113227A1 (en) | 2021-05-21 | 2022-11-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Stator for an electrical machine, electrical machine, motor vehicle, method for producing a stator |
-
1921
- 1921-12-24 CH CH99387D patent/CH99387A/en unknown
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE939392C (en) * | 1951-04-28 | 1956-02-23 | Demag Zug Gmbh | Roller table motor |
DE948714C (en) * | 1951-09-28 | 1956-09-06 | Westinghouse Electric Corp | Device for cooling the stator windings of high-voltage, high-performance turbo generators |
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 |
DE1014215B (en) * | 1952-03-10 | 1957-08-22 | Licentia Gmbh | Liquid-cooled rotor winding for electrical machines |
DE951514C (en) * | 1952-07-26 | 1956-10-31 | Westinghouse Electric Corp | Cooling dynamo-electric machines |
DE1020408B (en) * | 1953-01-27 | 1957-12-05 | Gen Electric | Device for the coolant supply in dynamo-electric machines |
DE975389C (en) * | 1954-05-01 | 1961-11-16 | Siemens Ag | Bars for electrical machines |
DE1202411B (en) * | 1955-05-18 | 1965-10-07 | Asea Ab | Cooling device for electrical agitator windings of melting furnaces |
DE19623553A1 (en) * | 1996-06-13 | 1997-12-18 | Klein Schanzlin & Becker Ag | Liquid-filled underwater motor |
DE102021113227A1 (en) | 2021-05-21 | 2022-11-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Stator for an electrical machine, electrical machine, motor vehicle, method for producing a stator |
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