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A DC chopper has 225 volts as input and the output required is 425 volts. If the non-conducting time of thyristor is 225 micro seconds, compute. i) Chopping frequency. ii) If the pulse width is (1/5)th of that in case (i) for constant frequency of operation, find the new output voltage. iii) If the frequency is increased 25% of that in case (i) keeping the conducting time constant, what is the new value of k and output voltage of the chopper.

A DC chopper has 225 volts as input and the output required is 425 volts. If the non-conducting time of thyristor is 225 micro seconds, compute. i) Chopping frequency. ii) If the pulse width is (1/5)th of that in case (i) for constant frequency of operation, find the new output voltage. iii) If the frequency is increased 25% of that in case (i) keeping the conducting time constant, what is the new value of k and output voltage of the chopper.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A DC chopper has 225 volts as input and the output required is 425 volts. If the non-conducting time of thyristor is 225 micro seconds, compute. i) Chopping frequency. ii) If the pulse width is (1/5)th of that in case (i) for constant frequency of operation, find the new output voltage. iii) If the frequency is increased 25% of that in case (i) keeping the conducting time constant, what is the new value of k and output voltage of the chopper.
Transcribed Image Text:A DC chopper has 225 volts as input and the output required is 425 volts. If the non-conducting time of thyristor is 225 micro seconds, compute. i) Chopping frequency. ii) If the pulse width is (1/5)th of that in case (i) for constant frequency of operation, find the new output voltage. iii) If the frequency is increased 25% of that in case (i) keeping the conducting time constant, what is the new value of k and output voltage of the chopper.
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