A resistive heater is energized from 220Vrms, 50 Hz sinusoidal voltage source through a transformer and controlled full wave rectifier as shown in the figure. The heating power is adjusted by the delay angle of thyristors from zero to 1 kW. Transformer turns ratio is defined as n=Npri:Nsec. The value of load resistor R is equal to n:1 As1 As3 R=752_ All components are ideal. a) Determine the transformer turns ratio n, and the thyristor delay angle a in order to keep the secondary voltage (i.e. thyristor voltage stress) minimum at the maximum power of 1kW. b) Calculate the input rms current at maximum heating power. c) Sketch the input current waveform for a=90°, find : 454 As2 rms value. eeleeee

A resistive heater is energized from 220Vrms, 50 Hz sinusoidal voltage source through a transformer and controlled full wave rectifier as shown in the figure. The heating power is adjusted by the delay angle of thyristors from zero to 1 kW. Transformer turns ratio is defined as n=Npri:Nsec. The value of load resistor R is equal to n:1 As1 As3 R=752_ All components are ideal. a) Determine the transformer turns ratio n, and the thyristor delay angle a in order to keep the secondary voltage (i.e. thyristor voltage stress) minimum at the maximum power of 1kW. b) Calculate the input rms current at maximum heating power. c) Sketch the input current waveform for a=90°, find : 454 As2 rms value. eeleeee

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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