Automatic voltage regulation system for AC generator
First Claim
1. In an automatic voltage regulation system for an AC generator, having voltage detector means for detecting an output voltage of the AC generator and a thyristor for controlling the field current in accordance with the difference between a reference voltage and the voltage detected by said detector means, said automatic voltage regulation system further comprising:
- synchronous point detector means for detecting a synchronous point of the output voltage of said AC generator;
a microprocessor for computing a firing angle of said thyristor in accordance with the difference between said reference voltage and the voltage detected by said voltage detector means and producing a signal representing the computed firing angle at the time of detection of the synchronous point; and
firing control means for turning on said thyristor in response to the firing angle signal at the firing angle computed by said microprocessor.
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Accused Products
Abstract
An output voltage of an AC generator is produced through a full-wave rectifier and converted into a digital signal by an A/D converter. This digital signal is compared with a reference signal, and in accordance with the difference therebetween, the firing angle of a thyristor is controlled to regulate the field current. Synchronous point detectors detect a synchronous point of the output voltage of the AC generator. A microprocessor computes a firing angle of the thyristor in accordance with the difference between the digital signal and the reference signal and produces a signal representing the computed firing angle upon detection of the synchronous point. The thyristor is fired at the firing angle computed by the microprocessor.
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Citations
5 Claims
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1. In an automatic voltage regulation system for an AC generator, having voltage detector means for detecting an output voltage of the AC generator and a thyristor for controlling the field current in accordance with the difference between a reference voltage and the voltage detected by said detector means, said automatic voltage regulation system further comprising:
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synchronous point detector means for detecting a synchronous point of the output voltage of said AC generator; a microprocessor for computing a firing angle of said thyristor in accordance with the difference between said reference voltage and the voltage detected by said voltage detector means and producing a signal representing the computed firing angle at the time of detection of the synchronous point; and firing control means for turning on said thyristor in response to the firing angle signal at the firing angle computed by said microprocessor. - View Dependent Claims (2, 3, 4, 5)
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Specification