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
Application number
Other languages
German (de)
Inventor
Oerlikon Maschinenfabrik
Rikli Hans
Original Assignee
Oerlikon Maschf
Rikli Hans
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oerlikon Maschf, Rikli Hans filed Critical Oerlikon Maschf
Publication of CH99387A publication Critical patent/CH99387A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24Windings 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)

PATENTANSPRUCH: Kühleinrichtung für Nutenwicklungen elektrischer Maschinen, dadurch gekennzeich net, dass wenigstens an einem Teil der Leiter in der Nut Kühlkanäle dicht anliegen zur Führung eines Kühlmittels. UNTERANSPRUCH: Kühleinrichtung nach Patentanspruch, da durch gekennzeichnet, dass die Kanalwände an,der Stromleitung beteiligt sind. PATENT CLAIM: Cooling device for slot windings in electrical machines, characterized in that at least part of the conductors in the slot are tightly fitted with cooling channels for guiding a coolant. SUBCLAIM: Cooling device according to claim, characterized in that the channel walls are involved in the power line.
CH99387D 1921-12-24 1921-12-24 Cooling device for slot windings in electrical machines. CH99387A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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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