DE447012C - Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a direct current machine coupled to it and a direct current / alternating current converter fed by the latter in a Leonard circuit - Google Patents

Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a direct current machine coupled to it and a direct current / alternating current converter fed by the latter in a Leonard circuit

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Publication number
DE447012C
DE447012C DEA45253D DEA0045253D DE447012C DE 447012 C DE447012 C DE 447012C DE A45253 D DEA45253 D DE A45253D DE A0045253 D DEA0045253 D DE A0045253D DE 447012 C DE447012 C DE 447012C
Authority
DE
Germany
Prior art keywords
converter
direct current
current
alternating current
periods
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
DEA45253D
Other languages
German (de)
Inventor
Wilhelm Weiler
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
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 AEG AG filed Critical AEG AG
Priority to DEA45253D priority Critical patent/DE447012C/en
Application granted granted Critical
Publication of DE447012C publication Critical patent/DE447012C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K47/00Dynamo-electric converters
    • H02K47/18AC/AC converters
    • H02K47/22Single-armature frequency converters with or without phase-number conversion
    • H02K47/26Single-armature frequency converters with or without phase-number conversion operating as under- or over-synchronously running asynchronous induction machines, e.g. cascade arrangement of asynchronous and synchronous machines

Landscapes

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

Description

Periodenumformer zur Kupplung zweier Wechseistromnetze von verschiedener Periodenzahl, bestehend aus einem Induktionsumformer, einer mit diesem gekuppelten Gleichstrommaschine und einem von letzterer in Leonardschaltung gespeisten Gleichstrom-Wechselstromumformer. In dem Patent ¢¢3 o86 ist ein Induktionsumforrner für die Kupplung zweier Wechselstromnetze von verschiedenen Periodenzahlen angegeben. Auf der Welle des Induktionsumformers a (s. die Zeichnung) sitzt eine Gleichstrommaschine b, die durch die von einem mit ihr verbundenen Gleichstrom-Drehstromumformer c, d aufzunehmende oder letzterem aus dem Netz zuzuführende Schlupfenergie die Energieübertragung regelt. Bei der hierdurch erzielten sehr empfindlichen Pufferwirkung wird zur Vermeidung von überlastungen 'die Grunderregung so eingestellt, daß Überlastungen in der einen Richtung nicht zu erwarten sind, solche in der anderen Richtung dagegen durch einen Erregersatz, bestehend aus den Maschnen m, tz und o" unmöglich gemacht werden.Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a DC machine coupled to this and a DC / AC converter fed by the latter in a Leonard circuit. In the patent ¢¢ 3086 an induction converter for the coupling of two alternating current networks with different numbers of periods is specified. On the shaft of the induction converter a (see the drawing) sits a direct current machine b, which regulates the energy transfer through the slip energy to be absorbed by a direct current three-phase converter c, d connected to it or supplied to the latter from the network. With the very sensitive buffer effect achieved in this way, the basic excitation is set in such a way that overloads in one direction are not to be expected, but in the other direction by a set of exciters consisting of the machines m, tz and o "is impossible be made.

Schwanken die Frequenzen der beiden Netze sehr stark, so genügt eine derartige Einstellung der Grunderregung nicht, um eine überlastung nach beiden Richtungen mit Sicherheit zu vermeiden. Es sind vielmehr zwei derartige Erregersätze erforderlich, von denen der eine den Energiefluß von Netz I nach Netz II, der andere den Energiefluß von Netz II nach Netz I begrenzt.If the frequencies of the two networks fluctuate very strongly, one is sufficient Such a setting of the basic excitation does not avoid an overload in both directions to be avoided with certainty. Rather, two such sets of excitation are required, one of them the energy flow from network I to network II, the other the energy flow limited from network II to network I.

.Statt zweier Erregersätze genügt es jedoch erfindungsgemiäß, nur die Erregermaschine n zu verdoppeln.Instead of two sets of exciters, however, according to the invention it is sufficient only to double the exciter n.

Das Schaltbild unterscheidet sich nur dadurch von demjenigen des Hauptpatents 443o86, daß die Erregerniaschine o noch eine zweite Erregerwicklung hat, die von einer zweiten Erregermaschine n' gespeist wird. Letztere ist genau der Erregermaschine n gleich, nur in bezug auf das Gleichstromerregernetz umgekehrt geschaltet. Während die EMK von n der Spannung e des letzteren Netzes gleich und entgegengesetzt ist, wenn Energiefluß von I nach 1I i Energiefluß von II nach I Begrenzung Empfindliche Pufferung Begrenzung Ampere Ampere Ampere Ampere _ -I- iioo + 1000 o - =ooo - ==oo il - =o 0 0 0 0 o l 0 0 0 =o wo ü bzw. i', die über die Aluminiumzellen oder ,ähnlichen Ventile A, und A' fließenden Maschinenströme von t und n' bedeuten, die die Erregerwicklungen der Erregermaschine o speisen. Werden die Begrenzungen nach der Tabelle erreicht, so wird das Feld der Gleichstrommaschine c dadurch derart geändert, daß die Schlupfenergie selbsttätig verringert wird.The circuit diagram only differs from that of the main patent 443o86 in that the excitation machine o has a second excitation winding which is fed by a second excitation machine n '. The latter is exactly the same as the excitation machine n, only switched in reverse with respect to the DC excitation network. While the emf of n is equal and opposite to the voltage e of the latter network if Energy flow from I to 1I i Energy flow from II to I. Limitation Sensitive buffering Limitation Amps amps amps amps _ -I- iioo + 1000 o - = ooo - == oo il - = o 0 0 0 0 ol 0 0 0 = o where ü and i 'mean the machine currents of t and n' flowing through the aluminum cells or similar valves A and A ' which feed the exciter windings of the exciter o. If the limits according to the table are reached, the field of the DC machine c is changed in such a way that the slip energy is automatically reduced.

Claims (1)

PATGNTANSPRUCI-I Periodenumformer zur Kupplung zweier Drehstromnetze von verschiedener Periodenzahl, bestehend aus einem Induktionsumformer, einer mit diesem gekuppelten Gleichstrommaschine und einem von letzterer in Leonardschaltung gespeisten Gleichstrom- Wechselstromumformer nach Patent 443 o86, dadurch gekennzeichnet, daß bei der Strom Jg von der Gleichstrommaschine b nach c fließt und etwa gleich ioo Prozent (Vollast) ist, ist die EMK von n' gleich und entgegengesetzt e, wenn der Strom Jg in umgekehrter Richtung fließt und ioo Prozent beträgt. EslassensichbeispielsweisefolgendeVerhältnisse erreichen, wobei .Jg =1- ioooAmp. der von I nach II fließenden Vollastleistung entspricht: Abweichungen der Periodenzahlen vom Normalwert der zwischen den Gleichstrommaschinen fließende Strom bei Erreichen eines bestimmten Wertes durcheinen Hilfsmaschinensatz begrenzt wird, der aus einem Antriebsmotor, gekuppelt mit drei Gleichstrommaschinen, besteht, von denen die eine eine zusätzliche Feldwicklung der Gleichstromseite des Gleichstrom-Wechselstromumformers speist und zwei einander entgegenwirkende Erregerwicklungen aufweist, die von der Differenz der vom überstromgesteuerten Spannungen je einer der beiden anderen Maschinen und einer unveränderlichen Gleichstromspannung beeinflußt sind, wobei beide Male je eine Aluminiumzelle einen Erregerstrom nur durch eine der Erregerwicklungen fließen läßt. PATGNTANSPRUCI-I period converter for coupling two three-phase systems with different number of periods, consisting of an induction converter, a DC machine coupled to this and a DC / AC converter fed by the latter in a Leonard circuit according to patent 443 o86, characterized in that the current Jg from the DC machine b to c flows and is approximately equal to 100 percent (full load), the emf of n 'is equal and opposite to e when the current Jg flows in the opposite direction and is 100 percent. The following relationships can be achieved, for example, where .Jg = 1- ioooAmp. corresponds to the full load power flowing from I to II: Deviations in the number of periods from the normal value the current flowing between the DC machines is limited when a certain value is reached by an auxiliary machine set consisting of a drive motor coupled with three DC machines, one of which is an additional field winding of the DC side of the DC / AC converter and has two opposing excitation windings, which are influenced by the difference between the overcurrent-controlled voltages of one of the two other machines and an unchangeable direct current voltage, with an aluminum cell each allowing an excitation current to flow through only one of the excitation windings.
DEA45253D 1925-06-17 1925-06-17 Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a direct current machine coupled to it and a direct current / alternating current converter fed by the latter in a Leonard circuit Expired DE447012C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA45253D DE447012C (en) 1925-06-17 1925-06-17 Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a direct current machine coupled to it and a direct current / alternating current converter fed by the latter in a Leonard circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA45253D DE447012C (en) 1925-06-17 1925-06-17 Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a direct current machine coupled to it and a direct current / alternating current converter fed by the latter in a Leonard circuit

Publications (1)

Publication Number Publication Date
DE447012C true DE447012C (en) 1927-07-14

Family

ID=6934615

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA45253D Expired DE447012C (en) 1925-06-17 1925-06-17 Period converter for coupling two alternating current networks with different number of periods, consisting of an induction converter, a direct current machine coupled to it and a direct current / alternating current converter fed by the latter in a Leonard circuit

Country Status (1)

Country Link
DE (1) DE447012C (en)

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