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Author

A.K. Datta

Bio: A.K. Datta is an academic researcher from University of Calcutta. The author has contributed to research in topics: Voltage regulator & Switched-mode power supply. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Papers
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Journal ArticleDOI
01 May 1973
TL;DR: In this paper, a potential transformer and a thyristor-controlled ac-to-dc converter are used to derive the excitation energy of a synchronous machine from its output terminals.
Abstract: The description of a scheme where all the excitation energy of a synchronous machine is derived from its output terminals through a potential transformer and a thyristor-controlled ac-to-dc converter is presented. The circuit is controlled by a strong feedback loop and performs the functions of both the conventional exciter and an automatic voltage regulator. The excitation energy is supplied in the form of dc voltage pulses of constant amplitude and variable width at constant frequency. The scheme is meant for isolated power supply and requires only a 12-V dry cell for triggering a pair of thyristors. Some experimental difficulties are also discussed.

1 citations


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Dissertation
04 Dec 2011
TL;DR: In this article, a regulacao de tensao pode ser influenciada by esse kind of controle, visto que a caracteristica de carga passa a depender tambem dessa cargaa auxiliar.
Abstract: Em micro centrais eletricas isoladas, as vezes, o regulador de velocidade pode ser substituido por uma carga auxiliar, chamada comumente de carga “dump”. Nestes casos, a regulacao de tensao pode ser influenciada por esse tipo de controle, visto que a caracteristica de carga passa a depender tambem dessa carga auxiliar. Neste trabalho e avaliada, a influencia do referido controle de frequencia, na regulacao de tensao de micro centrais eletricas isoladas. Em geral a carga “dump” faz com que o conjunto turbina-gerador perceba de instante em instante uma carga aproximadamente fixa, e a expectativa e que o controle de frequencia contribua favoravelmente com a regulacao de tensao. Entretanto, outros aspectos devem ser considerados, como por exemplo, o fator de potencia da carga, do qual a regulacao de tensao tambem e dependente.