DE369071C - Asynchronous motors, which receive an increased torque at start-up in that the slip energy is destroyed by tertiary currents induced by the secondary stray field - Google Patents

Asynchronous motors, which receive an increased torque at start-up in that the slip energy is destroyed by tertiary currents induced by the secondary stray field

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Publication number
DE369071C
DE369071C DES51027D DES0051027D DE369071C DE 369071 C DE369071 C DE 369071C DE S51027 D DES51027 D DE S51027D DE S0051027 D DES0051027 D DE S0051027D DE 369071 C DE369071 C DE 369071C
Authority
DE
Germany
Prior art keywords
stray field
tertiary
destroyed
asynchronous motors
receive
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
DES51027D
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
Original Assignee
Siemens Schuckertwerke AG
Publication date
Priority to DES51027D priority Critical patent/DE369071C/en
Application granted granted Critical
Publication of DE369071C publication Critical patent/DE369071C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K17/00Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02Asynchronous induction motors
    • H02K17/16Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/18Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having double-cage or multiple-cage rotors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Induction Machinery (AREA)

Description

Asynchronmotoren, die zum .Anlauf ein erhöhtes Drehmoment dadurch erhalten, daß die Schlupfenergie durch vom sekundären Streufeld induzierte Tertiärströme vernichtet wird. Um Asynchronmotoren bei Anlauf ein erhöhtes Drehmoment zu geben, kann man elektrisch gut leitende Metallschichten im Streufeld der Sekundärströme anordnen,.. die dazu dienen, die Schlupfenergie mittels. der in ihnen vom sekundären Streufeld induzierten Tertiärströme zu vernichten. - Als Metallschichten können besondere Tertiärleiter dienen, die im Streufeld der Sekundärleiter, sei es in der Nut, sei es an den Stirnseiten, angeordnet sind. Der Erfindung gemäß können nun diese- besonderen Tertiärleiter entbehrlich gemacht werden, indem man die Sekundärleiter des Motors selbst derart anordnet, daß die Verbindungen einer Nut. vom sekundären Streufeld der 'Verbindungen benachbarter Nuten der Quere nach durchsetzt werden. Die Leiter werden also; unbeschadet der normalen Rotorströme, von denen sie durchflossenwerden, gleichzeitig auch von den Tertiärströmen durchflossen.Asynchronous motors that generate an increased torque when starting that the slip energy is obtained by tertiary currents induced by the secondary stray field is destroyed. To give asynchronous motors an increased torque when starting, one can find electrically good conductive metal layers in the stray field of the secondary currents arrange, .. which serve to reduce the slip energy by means of. that in them from the secondary Annihilate stray field induced tertiary currents. - Can be used as metal layers special tertiary conductors are used, which are in the stray field of the secondary conductors, be it in the Groove, be it on the end faces, are arranged. According to the invention can now This particular tertiary ladder can be made dispensable by adding the secondary ladder the motor itself is arranged in such a way that the connections of a groove. from the secondary Stray field of the 'connections of neighboring grooves transversely to be penetrated. So the leaders become; without prejudice to the normal rotor currents through which they flow, at the same time also traversed by the tertiary currents.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung veranschaulicht. Als Sekundärwicklung des Motors ist eine Zweischichtstabwicklung angenommen. Die in den Nuten hochkant übereinanderstehenden Stäbe sind jedoch in den Wickelköpfen lach gelegt, wie dies aus Abb. z ersichtlich ist. Bei beschränktem Konstruktionsraum legt man die Leiter, entsprechend der Querschnittszeichnung der Abb. 2, schräg übereinander. Das Stirnstreufeld, dessen Kraftlinien gestrichelt eingetragen sind, durchsetzt die Stäbe ranmehr quer und induziert daher m Innern jedes Stabes erhebliche tertiäre Wirbelströme, die l"ei genügender Breite der Wicklungsstäbe völlig ausreichende Stärke besitzen, um die gewünschte Wirkung eines großen Energieverlustes und daher eines großen Steuermomentes des Motors hervorzurufen. Die Breite der Wicklungsstäbe in den Stirnverbindern kann weiter gesteigert werden, indem man die Leiter in den Stirnverbindern flach auswälzt: Mit dieser Anordnung ist noch der weitere Vorteil verbunden, daß durch die Induktion von Tertiärströmen das Streufeld des Motors bei erheblichen Schlüpfungen geschwächt wird. Auch hierdurch wird das maximale Drehmoment gerade in den Drehzahlbereichen, in denen man steuern will; außerordentlich erhöht.An exemplary embodiment of the invention is illustrated in the drawing. A two-layer bar winding is assumed as the secondary winding of the motor. the However, rods standing on edge in the grooves are in the winding heads laughed, as can be seen from Fig. z. With limited design space the conductors are placed diagonally on top of each other according to the cross-sectional drawing in Fig. 2. The forehead scatter field, whose lines of force are shown in dashed lines, penetrates the rods run more transversely and therefore induce considerable tertiary effects in the interior of each rod Eddy currents, which are completely sufficient if the width of the winding bars is sufficient Possess strength to the desired effect of a large loss of energy and therefore cause a large control torque of the engine. The width of the winding bars in the end connectors can be further increased by inserting the ladder into the Rolling end connectors flat: With this arrangement there is another advantage connected that by the induction of tertiary currents the stray field of the motor at considerable hatching is weakened. This also gives the maximum torque especially in the speed ranges in which you want to control; extraordinarily increased.

Zur weiteren Steigerung des Anlaufdrehinomentes können mit der Anordnung gemäß der Erfindung weitere Anordnungen kombiniert werden. So können noch besondere, zum Teil bekannte Tertiärleiter verwendet werden, die gleichfalls dazu beitragen,. mittels der in ihnen vom sekundären Streufeld induzierten Tertiärströme die Schlupfenergie vernichten. Auch kann es zweckmäßig sein, die sekundären Streufelder stellenweise zu verstärken durch Einlagern von Eisenschichten, z. B. bei Anwendung geteilter Leiter zwischen,die Teilleiter der Nut oder bei Ant#endung von Metallschichten, in denen die Tertiärströme auftreten, zwischen diese.To further increase the starting torque, the arrangement further arrangements can be combined according to the invention. So special, partly known tertiary ladder are used, which also help. by means of the tertiary currents induced in them by the secondary stray field, the slip energy destroy. It can also be useful to spot the secondary stray fields to be strengthened by incorporating iron layers, e.g. B. when using split Conductors between, the sub-conductors of the slot or when joining metal layers, in which the tertiary currents occur, between them.

Claims (1)

PATENTANSPRUCH: Asynchronmotoren, die zum Anlauf ein erhöhtes Drehmoment dadurch erhalten, daß die Schlupfenergie durch vom sekundären Streufeld induzierte Tertiärströme vernichtet wird, dadurch gekennzeichnet, daß die sekundären Stirnverbindungen derart gelagert sind, daß zur Erzeugung der tertiären Ströme die Verbindungen einer Nut vom sekundären Streufeld der Verbindungen benachbarter Nuten der Quere nach durchsetzt werden.PATENT CLAIM: Asynchronous motors that have an increased torque at start-up obtained in that the slip energy induced by the secondary stray field Tertiary currents is destroyed, characterized in that the secondary end connections are stored in such a way that to generate the tertiary currents, the compounds of a Groove from the secondary stray field of the connections of neighboring grooves across be enforced.
DES51027D Asynchronous motors, which receive an increased torque at start-up in that the slip energy is destroyed by tertiary currents induced by the secondary stray field Expired DE369071C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES51027D DE369071C (en) Asynchronous motors, which receive an increased torque at start-up in that the slip energy is destroyed by tertiary currents induced by the secondary stray field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES51027D DE369071C (en) Asynchronous motors, which receive an increased torque at start-up in that the slip energy is destroyed by tertiary currents induced by the secondary stray field

Publications (1)

Publication Number Publication Date
DE369071C true DE369071C (en) 1923-02-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DES51027D Expired DE369071C (en) Asynchronous motors, which receive an increased torque at start-up in that the slip energy is destroyed by tertiary currents induced by the secondary stray field

Country Status (1)

Country Link
DE (1) DE369071C (en)

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