DEP0013403DA - Circuit arrangement for balancing the load on rectifier elements connected in parallel. - Google Patents
Circuit arrangement for balancing the load on rectifier elements connected in parallel.Info
- Publication number
- DEP0013403DA DEP0013403DA DEP0013403DA DE P0013403D A DEP0013403D A DE P0013403DA DE P0013403D A DEP0013403D A DE P0013403DA
- Authority
- DE
- Germany
- Prior art keywords
- parallel
- rectifier elements
- circuit arrangement
- balancing
- load
- 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
Links
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
Description
Der innere Widerstand von Gleichrichterelementen, insbesondere von Glühkathodengleichrichtern ist stark unterschiedlich. Schaltet man mehrere derartige Gleichrichterelemente parallel, so verteilt sich der gesamte Strom ungleichmässig auf die einzelnen Gleichrichterelemente. Bei Glühkathodengleichrichtern erreicht die Ungleichheit des inneren Widerstandes Werte von 1 : 2, sodass eine Parallelschaltung unwirtschaftlich ist; andererseits werden für die Stromversorgung von Nachrichtengeräten Stromstärken verlangt, die Parallelschaltung notwendig machen.The internal resistance of rectifier elements, in particular of hot cathode rectifiers, is very different. If several such rectifier elements are connected in parallel, the entire current is distributed unevenly over the individual rectifier elements. In hot cathode rectifiers, the inequality of the internal resistance reaches values of 1: 2, so that a parallel connection is uneconomical; on the other hand, currents are required for the power supply of communication devices that make parallel connection necessary.
Zur Lösung dieser Aufgabe werden derartige Gleichrichterelemente über symmetrische Drosseln parallel geschaltet, denen der Strom über einen Mittelabgriff zugeführt wird. Sind mehr als zwei Gleichrichter parallel geschaltet, so kann man gruppenweise vorgehen und zwei Gruppen parallel geschalteter Gleichrichter über eine weitere symmetrische Drossel parallel schalten.To solve this problem, such rectifier elements are connected in parallel via symmetrical chokes to which the current is fed via a center tap. If more than two rectifiers are connected in parallel, you can proceed in groups and connect two groups of rectifiers connected in parallel via a further symmetrical choke.
In den Figuren 1 und 2 sind Beispiele der Erfindung dargestellt, die nachstehend beschrieben werden:Examples of the invention are shown in FIGS. 1 and 2, which are described below:
Zwei Gleichrichterelemente z.B. Glühkathodenröhren Gl 1 und Gl 2 sind über eine Drossel Dr parallel geschaltet. Die Drossel ist in der Mitte an der Klemme Kl angezapft. Die Stromzuführung erfolgt über die Klemmen K 2 und K 3. Durch die magnetische Kopplung der beiden Drosselhälften erzwingt die symmetrische Drossel eine gleichmässige Verteilung der Belastungsströme auf die parallel geschalteten Röhren Gl 1 und Gl 2.Two rectifier elements, e.g. hot cathode tubes Gl 1 and Gl 2, are connected in parallel via a choke Dr. The throttle is tapped in the middle at the terminal Kl. Power is supplied via terminals K 2 and K 3. Due to the magnetic coupling of the two throttle halves, the symmetrical throttle forces an even distribution of the load currents on the parallel-connected tubes Gl 1 and Gl 2.
Ist die gewünschte Leistung grösser als die zweier Gleichrichterröhren, so kann man gemäss Figur 2 die Schaltung verdoppeln und die Gleichrichterröhren Gl 1 und Gl 2 über die Drossel Dr 1, die Gleichrichterröhren Gl 3 und Gl 4 über die Dr 2 und die beiden Parallelschaltungen über die Drossel Dr 3 parallel schalten. Die Ein- und Ausgangsklemmen sind dann wieder die Klemmen K 2 und K 3.If the desired power is greater than that of two rectifier tubes, the circuit can be doubled according to FIG Connect throttle Dr 3 in parallel. The input and output terminals are then again terminals K 2 and K 3.
Claims (2)
Family
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