Journal Article10.1109/TIECI.1979.351620
Digitally Controlled Thyristor Current Source
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TL;DR: In this paper, a digitally controlled current source based on a 6-pulse thyristor bridge is described, where the source is amenable to direct microprocessor control when part of a larger system, and a new method for zero voltage detection and configuration and analysis of a digital proportional-integral (PI) controller are presented.
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Abstract: A digitally controlled current source, based on a 6-pulse thyristor bridge is described. When part of a larger system, the source is amenable to direct microprocessor control. Salient aspects of the design described here are a new method for zero voltage detection and the configuration and analysis of a digital proportional-integral (PI) controller. The paper gives the design procedure as well as the experimental results obtained on the actual current source.
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Citations
Patent
Digital power converter
Thomas A. Nondahl
- 02 Feb 1983
TL;DR: In this paper, a microprocessor-based static converter control circuit includes a free-running counter which is synchronized with the powerline phase and frequency using a zero-crossing detector circuit.
29
Microprocessor Controller for a Thyristor Converter with an Improved Power Factor
TL;DR: In this article, a microprocessor-based algorithm for steady-state and dynamic control of a modified six-pulse converter with two neutral-connected auxiliary thyristors is described.
24
Fault Diagnosis in Three-Phase Thyristor Converters Using Microprocessor
TL;DR: In this article, a microprocessor-based fault diagnosis scheme for a three-phase fully controlled converter is presented, where the system also has the provision for a micro processor-based firing scheme and a feedback-current control loop which provides protection against short circuit across the load terminals.
21
Fast Response and Optimum Regulation in Digitally Controlled Thyristor Converters
Fang L. Luo,Roland J. Hill +1 more
TL;DR: In this paper, it was found that the completed feedback loop is significant in determining the influence of the distribution parameters to the response, with the first step response considerably improved by using a variable-gain control.
18
Patent
Control signal generator arrangement for semiconductor switches
John Elmer Gilliam
- 10 Dec 1982
TL;DR: In this paper, a three-phase supply (R,Y,B) is controlled by six thyristors (RU, RL, YU, YL, BU, BL) which are controlled by a control signal generator comprising a programmed microcomputer (2), a zero-crossover detector (3), a clock pulse generator (6), and a counter (7) in such manner-that the thyristor conduction angles are determined by a digital signal applied to an input (17) of the microcomputer.
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References
A Fast-Response DC Motor Speed Control System
TL;DR: In this article, the authors describe the design, construction, and testing of a speed control unit for a separately excited dc motor fed from a three-phase six-pulse fully controlled thyristor bridge.
65
A theoretical model for single-phase silicon-controlled rectifier systems
E. Parrish,E. McVey +1 more
TL;DR: In this paper, a linear model for determining stability, relative stability, and dynamic response of phase-angle modulated SCR systems is presented, which is based on sampled-data control theory.
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