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Journal ArticleDOI

Voltage regulation of 12-phase double-way rectifiers

R. L. Witzke, +2 more
- 01 Jul 1953 - 
- Vol. 72, Iss: 7, pp 617-617
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TLDR
In this article, it was shown that at larger angles of overlap an inherent delay angle, introduced by a-c reactance common to two or more simple rectifiers, reduces the direct voltage and thereby increases the voltage regulation.
Abstract
CONVENTIONAL METHODS of calculating rectifier voltage regulation are valid only if the angle of overlap is less than 360 degrees divided by the number of phases. At larger angles of overlap an inherent delay angle, introduced by a-c reactance common to two or more simple rectifiers, reduces the direct voltage and thereby increases the voltage regulation. This phenomenon has been described in two papers,1, 2 recently presented to the Institute, in which curves and equations for determining voltage regulation of 6-phase rectifiers were given. Two earlier articles5, 4 recognized the phenomenon in 6-phase circuits.

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Citations
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Proceedings ArticleDOI

Thyristor Controlled Rectifiers for Subway Substations

TL;DR: In this paper, the analysis of subway thyristor controlled rectifier substations is presented, where the classical analysis developed for 12-pulse diode bridges is adapted to consider thyristors and simulated.
Journal ArticleDOI

Effects of interaction among groups in a multigroup a.c.ߝd.c. convertor

TL;DR: In this paper, an analysis of the behavior of multigroup convertors is presented, which is expressed in terms of a coupling factor, which affects rectification by a modification of the voltage waveform across the rectifying elements in the region of natural ignition.
Journal ArticleDOI

Influence of commutating reactance on the design of DC power supply converters

TL;DR: In this article, the significance of choice of transformer commutating reactance and its importance in the design of DC substation convertors is discussed, and the importance of DC transformer convertors for DC railway systems is discussed.
Proceedings ArticleDOI

Harmonics effect on rectifier current imbalance

V. Gelman
TL;DR: In this paper, the effect of harmonics on the rectifier current imbalance was analyzed in a field test of a 12-pulse rectifier-transformer with wye and delta bridges connected in parallel.

Geometric description of bridge rectifier operational modes using regular polygons

TL;DR: In this article, the AC line currents in idealised 3-phase bridge rectifier systems trace out regular polygons and this fact is used to derive a geometric visualisation of rectifier operation and to explain operational modes in 6-and 12-pulse rectifiers from a geometric point of view.