DE472130C - Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers - Google Patents

Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers

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Publication number
DE472130C
DE472130C DEA48640D DEA0048640D DE472130C DE 472130 C DE472130 C DE 472130C DE A48640 D DEA48640 D DE A48640D DE A0048640 D DEA0048640 D DE A0048640D DE 472130 C DE472130 C DE 472130C
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DE
Germany
Prior art keywords
phase
transformer
current
points
circuit
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
DEA48640D
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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.)
BROWN AG
BBC Brown Boveri France SA
Original Assignee
BROWN AG
BBC Brown Boveri France SA
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Application filed by BROWN AG, BBC Brown Boveri France SA filed Critical BROWN AG
Priority to DEA48640D priority Critical patent/DE472130C/en
Application granted granted Critical
Publication of DE472130C publication Critical patent/DE472130C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Description

Schaltung für von Zweiphasenstrom parallel gespeiste Transformatorenpaare, bei denen jeder Transformator Zweiphasenstrom in 3 n-phasigen Wechselstrom umwandelt und insbesondere zur Speisung von Gleichrichtern dienen kann Zur Umwandlung von Zweiphasenstrom in 3 n-phasenstrom werden vielfach dreischenklige Transformatoren verwendet, welche eine an das Zweiphasennetz anzuschließende Primärwicklung und eine 3 n-phasige, mit Sternpunkt versehene Sekundärwicklung, z. B. zur Speisung von Gleichrichtern, besi:zen. Die an das Zweiphasennetz anzuschließende Wicklung kann nun durch die Kombination von Wicklungen erhalten werden, welche auf den drei Schenkeln des Transformators liegen, deren Strom- bzw. Spannungsphasen also gegeneinander einen Winkel von i2o° besitzen. In der Abb. i ist eine solche Primärwicklung veranschaulicht. Die Wicklungen A und B liegen auf zwei Schenkeln des Transformators. Sie haben die gleiche Windungszahl und schließen die Winkel 12o° bzw. 6o° miteinander ein. Der dritte Schenkel trägt die Wicklungen C, und C2, welche so mit und B verbunden sind, daß die Kombination zwei gleichseitige Dreiecke aufweist, von denen je eine Seite sein Mittelstück der Wicklungen Cl bzw. C2 ist. Die Windungszahlen der Wicklungen C1 und C2 sind nun so gewählt, daß die Enden dieser Wicklungen die Eckpunkte eines Quadrates i-2-3-4 bilden und zum Anschluß dieses Wicklungssystems an das gegebene Zweiphasennetz dienen, wie es die Abbildung zeigt. Die drei Schenkel des Transformators tragen nun auch die Sekundärwicklung, welche im dargestellten Falle sechsphasig ausgeführt ist, wobei jeweils zwei um i8o° verschobene Phasen. auf den. gleichen Transformatorschenkel untergebracht sind. Die Ungleichheit der Wicklungen A, B einerseits und C1 und C2 andererseits bringt nun eine gewisse Ursymmetrie in das ganze System hinein, so daß hinsichtlich Strombeanspruchung, Spannungsabfall, Raumwinkel usw. auch in den sekundären Phasen'Verschiedenheiten auftreten können. Ein gewisser Ausgleich läßt sich aber erfindungsgemäß beim Anschluß von Transformatorpaaren an Zweiphasennetze dadurch schaffen, d aß die an die beiden Phasen des Zweiphasennetzes arge,. schlossenen Punkte der Primärwicklung bei den jeweils zu einem Paar gehörenden. Transformatoren in ihrer Reihenfolge zyk_isch vertauscht werden, so daß also, wenn bei der Primärwicklung P, des einen Transformators die Anschlußpunkte i und 3 an Phase I, die Anschlußpunkte z und 4 an Phase II des-Zweiphasennetzes liegen, bei der Primärwicklung P2 des zweiten Transformators die Anschlußpunkte 2 und 4an Phase I und die,-Anschlußpunkte 3 und i an Phase II des Zweiphasensystems gelegt sind. Besitzt nun jeder dieser Transformatoren z. *B. ein s,echsphasi,-ges, in Stern geschaltetes Sekundärsystem, Q1 bzw. Q2, so ergibt sich eine Phasenverschiebung der beiden Sekundärsysteme gegeneinander von 3o°. Da nun aber beide: zur Speisung eines (oder mehrerer) Gleichrichter dienen, also da sie gewissermaßen auch parallel arbeiten, ist es zweckmäßig und vorteilhaft, ihre Sternpunkte über Saugdrosselspulen S (Patent 3q9593) zu verbinden, um die Oberharmonische zu unterdrücken und eine zeitliche überlappung der Ströme beider Systeme zu erzielen. Auch diese Maßnahme trägt zum Ausgleich der Verschiedenheit und zur größeren Symmetrie des Ganzen bei.Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers and a 3 n-phase, star-point provided secondary winding, e.g. B. to feed rectifiers, besi: zen. The winding to be connected to the two-phase network can now be obtained by combining windings which are located on the three legs of the transformer, the current or voltage phases of which therefore have an angle of i2o ° with respect to one another. Such a primary winding is illustrated in Fig. I. The windings A and B are on two legs of the transformer. They have the same number of turns and enclose the angles 12o ° and 6o ° with one another. The third leg carries the windings C and C2, which are connected to and B in such a way that the combination has two equilateral triangles, one side of which is its center piece of the windings C1 and C2, respectively. The number of turns of the windings C1 and C2 are selected so that the ends of these windings form the corner points of a square i-2-3-4 and serve to connect this winding system to the given two-phase network, as shown in the figure. The three legs of the transformer now also carry the secondary winding, which in the illustrated case has six phases, with two phases each shifted by 180 °. on the. same transformer legs are housed. The inequality of the windings A, B on the one hand and C1 and C2 on the other hand brings a certain primordial symmetry into the whole system, so that differences in the current load, voltage drop, solid angle etc. can also occur in the secondary phases. According to the invention, however, a certain compensation can be created when connecting transformer pairs to two-phase networks by the fact that the two phases of the two-phase network are bad. closed points of the primary winding for each belonging to a pair. Transformers are interchanged in their order zyk_isch, so that if in the primary winding P of one transformer the connection points i and 3 are on phase I, the connection points z and 4 on phase II of the two-phase network, in the primary winding P2 of the second transformer the connection points 2 and 4 are connected to phase I and the connection points 3 and i are connected to phase II of the two-phase system. Now owns each of these transformers z. * B. a s, echsphasi, -ges, star-connected secondary system, Q1 or Q2, results in a phase shift between the two secondary systems of 30 °. But since both: serve to feed one (or more) rectifiers, i.e. because they also work in parallel, it is practical and advantageous to connect their star points via suction choke coils S (patent 3q9593) in order to suppress the harmonic and a temporal overlap to achieve the currents of both systems. This measure also contributes to the balance of the differences and to the greater symmetry of the whole.

Die Anwendung der beschriebenen Schaltung ist nicht auf das Ausführungsbeispiel der Abb. = beschränkt. So zeigt z. B. Abb. 2 eine andere Kombination von Wicklungen, die auf den drei Schenkeln .der Transformatoren angeordnet und zum Anschluß an das Zweiphasennetz geeignet sind. Sie ste:It eine (eigenartige Verknüpfung zweier symmetrischer, in Dreieck geschalteter Dreiphasenwicklungen dar. Das Dreieck I-2-5 ist mit dem Dreieck 3-4-6 in den Punkten, 7 und 8 verbunden. Die Lage der Dreiecke zueinander ist derart, daß die Ecken i, 2, 3 und 4 Eckpunkte eines Quadrates bilden und zum Anschluß des Zweiphasennetzes dienen können. Wie aus Abb. 2 ersichtlich, sind auch hier die beiden Primärwicklungen P1 und P2, welche den ein Trans;-formatorpaar bi:denden Transformatoren angehören, derart an das Zweiphasennetz angeschlossen, daß die AnsclLußpunkte i, 2, 3, 4 in ihrer Re:henfolge zyklisch _vertauscht sind. Die Bedeutung der übrigen Buchstaben ist die gleiche wie in Abb. i. Es lassen sich-natürlich noch andere Wicklungen angeben, bei denen die Schaltung Üer Erfindung angewendet werden kann.The circuit described is not applied to the exemplary embodiment the fig. = limited. So shows z. B. Fig. 2 another combination of windings, arranged on the three legs of the transformers and for connection to the Two-phase network are suitable. You ste: It is a (strange combination of two symmetrical, three-phase windings connected in a triangle. The triangle I-2-5 is with the Triangle 3-4-6 connected in points 7 and 8. The position of the triangles to each other is such that the corners i, 2, 3 and 4 form corner points of a square and to Can serve connection of the two-phase network. As can be seen from Fig. 2, are also here the two primary windings P1 and P2, which end one transformer pair Transformers belong, so connected to the two-phase network that the connection points i, 2, 3, 4 are cyclically interchanged in their order. The importance of the rest Letter is the same as in Fig. I. Other windings can of course also be used indicate in which the circuit according to the invention can be applied.

Claims (1)

l ATENTANJPRÜCIIE: i. Schaltung für von Zweiphasenstrom parallel gespeiste Transformatorenpaare, bei denen jeder Transformator Zwei;-phasenst:om in 3 n-phasigen Wechselstrom (n =ganze Zahl) umwandelt und insbesonder2 zur Speisung von Gleichrichtern dienen kann, dadurch gekennzeichnet, daß die an die beiden Phasen des Zweiphasen,-netzes angeschlossenen Punkte der Pri;-märwick:ungen der beiden jeweils zu einem Paar gehörenden Transformatoren in ihrer Reihenfolge zyklisch vertauscht sind, so daß, wenn bei dem einen Transformator die Anschlußpunkte i und 3 an Phase I, die Anschlußpunkte 2 und 4 an Phase Il des Zweiphasennetzes liegen, bei dem anderen Transformator des Paares die Anschlußpunkte 2 und 4 an Phase I und die Anschlußpunkte 3 und i an die Phase Il des Zweiphasennetzes gelegt sind, wobei die Punkte i und 3 die Enden der einen in beiden Transformatoren gleichliegen)-den Phasenwicklung, die Punkte 2 und 4 die Enden der anderen, in beiden Transformatoren. ebenfalls gleichhegenden Phasenwicklung des zweiphasigen Wicklungssystems darsteaen. ' z. Schaltung nach Anspruch i, dadurch gekennzeichnet, daß, falls jeder der beiden zugehörigen Transformatoren in Stern geschaltete Sekundärwicklungen trägt, die Sternpunkte der .Sekundärwicklung durch Saugdrosseln nach Patent 3o9 593 verbünden sind. l IDENTITY EXAMINATION: i. Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two; -phases: om into 3 n-phase alternating current (n = whole number) and in particular can be used to feed rectifiers, characterized in that the two phases of the Two-phase, network-connected points of the primary winding: ungen of the two transformers belonging to a pair are cyclically reversed in their order, so that if one transformer has connection points i and 3 to phase I, connection points 2 and 4 are connected to phase II of the two-phase network, in the other transformer of the pair connection points 2 and 4 are connected to phase I and connection points 3 and i are connected to phase II of the two-phase network, with points i and 3 being the ends of the one in both transformers ) -the phase winding, points 2 and 4 the ends of the other, in both transformers. also show the identical phase winding of the two-phase winding system. 'z. Circuit according to Claim i, characterized in that, if each of the two associated transformers carries star-connected secondary windings, the star points of the secondary winding are connected by suction throttles according to Patent 3o9 593.
DEA48640D 1926-08-28 1926-08-29 Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers Expired DE472130C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA48640D DE472130C (en) 1926-08-28 1926-08-29 Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE642297X 1926-08-28
DEA48640D DE472130C (en) 1926-08-28 1926-08-29 Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers

Publications (1)

Publication Number Publication Date
DE472130C true DE472130C (en) 1929-02-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEA48640D Expired DE472130C (en) 1926-08-28 1926-08-29 Circuit for transformer pairs fed in parallel by two-phase current, in which each transformer converts two-phase current into 3 n-phase alternating current and can be used in particular to feed rectifiers

Country Status (1)

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DE (1) DE472130C (en)

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