DE480372C - Device for suppressing oscillations in a cascade, consisting of an asynchronous motor and three-phase collector machine - Google Patents

Device for suppressing oscillations in a cascade, consisting of an asynchronous motor and three-phase collector machine

Info

Publication number
DE480372C
DE480372C DEA51876D DEA0051876D DE480372C DE 480372 C DE480372 C DE 480372C DE A51876 D DEA51876 D DE A51876D DE A0051876 D DEA0051876 D DE A0051876D DE 480372 C DE480372 C DE 480372C
Authority
DE
Germany
Prior art keywords
cascade
collector machine
phase collector
asynchronous motor
phase
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
DEA51876D
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.)
AEG AG
Original Assignee
AEG AG
Publication date
Priority to DEA51876D priority Critical patent/DE480372C/en
Application granted granted Critical
Publication of DE480372C publication Critical patent/DE480372C/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/34—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter
    • H02K17/38—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with a commutator machine

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Description

Einrichtung zur Unterdrückung von Pendelungen bei einer Kaskade, bestehend aus Asynchronmotor und Drehstrom-Kollektormaschine Kaskaden, bestehend aus einem ein- oder mehrphasigen Asynchronmotor und einer Drehstrom-Kollektormaschine, die vom Läufer aus über Schleifringe mit Spannung von Netzfrequenz erregt wird, sind bekannt. Es ist ferner bekannt, die Erregerspannung nicht dem Netz unmittelbar, sondern einer kleinen, synchron vom Netz angetriebenen synchronen Erregermaschine zu entnehmen.Device for suppressing oscillations in a cascade, consisting of of asynchronous motor and three-phase collector machine cascades, consisting of one single or multi-phase asynchronous motor and a three-phase collector machine that is excited from the rotor via slip rings with voltage at the mains frequency known. It is also known that the excitation voltage is not directly connected to the network, but a small, synchronous excitation machine driven synchronously by the mains refer to.

Eine derartige bekannte Anordnung ist in Abb. i dargestellt. In ihr bedeutet v den Vordermotor, h den Hintermotor, tv die Kompensationswicklung, welche das Ankerfeld aufhebt, g den Synchrongenerator und m den Synchronmotor.Such a known arrangement is shown in Fig. I. In her v means the front motor, h the rear motor, tv the compensation winding, which the armature field cancels, g the synchronous generator and m the synchronous motor.

In dieser Kaskade wird der Sekundärstrom!. von der im Läufer des Vordermotors v induzierten Schlupfspannung es und der dem Hintermotor h über die Schleifringe aufgedrückten, in /t aber auf Schlupffrequenz umgeformten Spannung elt erzeugt.In this cascade the secondary current is !. from the one in the rotor of the front engine v induced slip voltage es and that of the rear motor h via the slip rings applied voltage elt which is converted into / t but converted to slip frequency.

Wenn der Synchronmotor m genau synchron mit Netzfrequenz liefe, so hätten es und eft eine feste Phasenlage zueinander, wie es bei Entnahme der Erregerspannung unmittelbar aus dem Netz der Fall ist.If the synchronous motor m ran exactly synchronously with the mains frequency, so it and eft would have a fixed phase position to one another, as would be the case with the removal of the excitation voltage is the case directly from the network.

Nun können bei jeder Synchronmaschine kleine Pendelungen auftreten, z. B. durch ein einmaliges Schwanken des Netzvektors hervorgerufen. In diesem Falle pendelt aber auch ei, gegen es. Die Folge davon ist eine pendelnde Leistungsaufnahme des Vordermotors, die unzulässig hohe Werte annehmen kann. Derartige Pendelungen werden erfindungsgemäß dadurch unterdrückt, daß der Ständer der Maschine lz eine mit der Kompensationswicklung w in Reihe liegende, aber gegen w um 9o elektrische Grade verschobene Erregerwicklung d entsprechend der Abb. a @erhält, die im Ankerkreis durch die Rotation des Ankers eine den Ankerstrom schwächende EMK erzeugt. Diese Wicklung besteht nur aus wenig Windungen.Small oscillations can now occur in every synchronous machine, e.g. B. caused by a one-time fluctuation of the network vector. In this case, however, egg also oscillates against it. The consequence of this is an oscillating power consumption of the front engine, which can assume inadmissibly high values. Such oscillations are according to the invention suppresses characterized in that the stator of the machine lz an excitation coil with the compensation winding w in series lying, but shifted towards w to 9o electrical degrees d corresponding to fig a @ obtained in the armature circuit by the rotation of the armature an the. Armature current weakening EMF is generated. This winding consists of only a few turns.

Im stationären Zustand ist die Wicklung @d wirkungslos, weil sie stets durch den Strom 13 so ausgeglichen wird, daß, ein Drehfeld: :entsteht, welches der den Schleifringen von h aufgedrückten Spannung genügt.In the stationary state the winding @d has no effect because it is always is balanced by the current 13 so that, a rotating field:: arises, which of the The tension applied to the slip rings by h is sufficient.

Claims (1)

PATENTANSPRUCH: Einrichtung zur Unterdrückung von Pendelungen bei einer Kaskade, bestehend aus einem ein- oder mehrphasigen Asynehronmobor und einer über Schleifringe von einem Synchron-Erreger-Umformer mit Netzfrequenz erregten Drehstrom-Kollektormaschine mit oder ohne Kompensationswicklung, dadurch gekennzeichn(#,t, daß die Drehstrom-Kollektormaschine mit einer vom Kommutatorstrom durchflossenen und bei vorhandener Kompensationswicklung mit dieser in Reihe liegenden, gegen die Kompensationswicklung um 9o elektrische Grade verschobenen Erregerwicklung von wenig Windungen ausgerüstet ist.PATENT CLAIM: Device for suppressing oscillations at a cascade, consisting of a single or multi-phase Asynehronmobor and a excited via slip rings from a synchronous exciter converter with mains frequency Three-phase collector machine with or without compensation winding, identified by this (#, t, that the three-phase collector machine with a commutator current flowing through it and if there is a compensation winding with this lying in series, against the Compensation winding of little excitation winding shifted by 9o electrical degrees Turns is equipped.
DEA51876D Device for suppressing oscillations in a cascade, consisting of an asynchronous motor and three-phase collector machine Expired DE480372C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA51876D DE480372C (en) Device for suppressing oscillations in a cascade, consisting of an asynchronous motor and three-phase collector machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA51876D DE480372C (en) Device for suppressing oscillations in a cascade, consisting of an asynchronous motor and three-phase collector machine

Publications (1)

Publication Number Publication Date
DE480372C true DE480372C (en) 1929-08-01

Family

ID=6938177

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA51876D Expired DE480372C (en) Device for suppressing oscillations in a cascade, consisting of an asynchronous motor and three-phase collector machine

Country Status (1)

Country Link
DE (1) DE480372C (en)

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