DE508373C - Protective body to prevent glow discharges, which surrounds the insulated conductors of electrical high-voltage machines at their point of exit from the active iron - Google Patents

Protective body to prevent glow discharges, which surrounds the insulated conductors of electrical high-voltage machines at their point of exit from the active iron

Info

Publication number
DE508373C
DE508373C DES56884D DES0056884D DE508373C DE 508373 C DE508373 C DE 508373C DE S56884 D DES56884 D DE S56884D DE S0056884 D DES0056884 D DE S0056884D DE 508373 C DE508373 C DE 508373C
Authority
DE
Germany
Prior art keywords
surrounds
exit
point
insulated conductors
protective body
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
Application number
DES56884D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schuckertwerke AG
Siemens Corp
Original Assignee
Siemens Schuckertwerke AG
Siemens Corp
Publication date
Priority to DES56884D priority Critical patent/DE508373C/en
Application granted granted Critical
Publication of DE508373C publication Critical patent/DE508373C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Bodies (AREA)
  • Insulating Of Coils (AREA)

Description

Bei elektrischen Maschinen für Hochspannung wird die Isolation durch Glimmentladungen gefährdet. Insbesondere ist dies der Fall an den Stellen, wo die Nutenhülsen, die die wirksamen Leiter isolierend umhüllen, aus dem Eisenblechpakete in die Luft austreten. Durch Vergrößern der Hülsenausladung oder Vermehrung der Hülsen wand stärke ist es nur in begrenztem Maße gelungen, die Glimmentladungen hintanzuhalten. Mittel, die diesen Glimmentladungen besser entgegenwirken sollen, haben zu komplizierten Einrichtungen an den Nutenenden der Maschinen geführt. Die Erfindung gibt nun ein sehr einfaches und sehr wirkungsvolles Mittel für denselben Zweck an. Sie besteht darin, daß 'der Schutzkörper, der die isolierten Leiter an ihrer Austrittsstelle aus dem aktiven Eisen umgibt, als ein nach den Wickelköpfen zu allmählich sich erweiternder Metallhohlkörper ausgebildet ist. Eine besondere Aueführungsform der Erfindung ist in der Zeichnung dargestellt. Diese zeigt das Blechpaket b des Ständers einer elektrischen Maschine und in einer Nut dieses Ständers die Hülse A, die die Ankerleiter I umgibt und zu beiden Seiten des Blechpaketes aus diesem ein Stück herausgeführt ist. Nach der Erfindung sind an der Austrittsstelle dieser Hülse h aus dem Blechpaket b kurze Blechtrompeten t angeordnet, die mit dem Eisenkörper durch Schweißen, Löten, Schrauben oder Nieten oder auf ähnliche Weise metallisch verbunden sind. Durch diese Trompeten wird die unmittelbare Kantenwirkung des Eisenblechpaketes beseitigt und eine allzu starke Konzentration der Feldstärke vermieden.In electrical machines for high voltage, the insulation is endangered by glow discharges. This is particularly the case at the points where the grooved sleeves, which encase the effective conductors in an insulating manner, emerge from the sheet-iron stacks into the air. By increasing the sleeve projection or increasing the sleeve wall thickness, it was only possible to a limited extent to prevent the glow discharges. Means that are supposed to better counteract these glow discharges have led to complicated devices at the groove ends of the machines. The invention now provides a very simple and very effective means for the same purpose. It consists in that the protective body, which surrounds the insulated conductors at their point of exit from the active iron, is designed as a hollow metal body which gradually widens towards the end windings. A particular embodiment of the invention is shown in the drawing. This shows the laminated core b of the stator of an electrical machine and in a groove of this stator the sleeve A, which surrounds the armature conductor I and is led out a piece on both sides of the laminated core. According to the invention, short sheet metal trumpets t are arranged at the exit point of this sleeve h from the laminated core b , which are metallically connected to the iron body by welding, soldering, screwing or riveting or in a similar manner. With these trumpets, the direct edge effect of the sheet iron package is eliminated and an overly strong concentration of the field strength is avoided.

Der Raum zwischen den Blechtrompeten und der Nutenhülse wird zweckmäßig mit einer Isoliermasse m ausgefüllt. Hierdurch wird erreicht, daß die Zonen hoher elektrischer Feldstärke nicht mehr von Luft, son-The space between the brass trumpets and the grooved sleeve is expediently filled with an insulating compound m. This ensures that the zones of high electric field strength are no longer air, but

Claims (1)

Patentansprüche:Patent claims: dem nur von festem Isoliermaterial erfüllt sind, das dem elektrischen Felde einen wesentlich höheren Widerstand bietet als die Luft. Die Felddichte am Rande der Metalltrompeten wird durch Abrundung oder Umbördelung des Randes sowie durch genügenden Abstand des Randes von der Isolierhülse auf einen ausreichenden geringen Betrag gebracht. Bei Herstellung der Trompeten aus Eisenblech ist es vorteilhaft, die Trompeten zu schlitzen, um zirkuläre Kraftlinienströmung und dadurch entstehende Wirbelströme zu vermeiden.which are only fulfilled by solid insulating material, which is essential to the electrical field offers higher resistance than air. The field density at the edge of the metal trumpets is made by rounding or flanging the edge as well as by sufficient spacing brought the edge of the insulating sleeve to a sufficiently small amount. When making the trumpets from sheet iron, it is advantageous to use the trumpets Slit in order to close off circular force line flow and the eddy currents that arise as a result avoid.
DES56884D Protective body to prevent glow discharges, which surrounds the insulated conductors of electrical high-voltage machines at their point of exit from the active iron Expired DE508373C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES56884D DE508373C (en) Protective body to prevent glow discharges, which surrounds the insulated conductors of electrical high-voltage machines at their point of exit from the active iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES56884D DE508373C (en) Protective body to prevent glow discharges, which surrounds the insulated conductors of electrical high-voltage machines at their point of exit from the active iron

Publications (1)

Publication Number Publication Date
DE508373C true DE508373C (en) 1930-09-26

Family

ID=7491425

Family Applications (1)

Application Number Title Priority Date Filing Date
DES56884D Expired DE508373C (en) Protective body to prevent glow discharges, which surrounds the insulated conductors of electrical high-voltage machines at their point of exit from the active iron

Country Status (1)

Country Link
DE (1) DE508373C (en)

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