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(b) A single-phase fully controlled rectifier is used as a power converter to supply a DC source of separately excited DC motor from 230 V, 50 Hz voltage source. The motor has rated value of 200 V, 800 rpm, 110 A with the armature resistance of 0.12 Q. Under continuous conduction mode operation, (i) If the motor running at speed of 550 rpm, examine the firing angle at rated motor torque. (ii) Suggest a new firing angle when the motor rotates inversely with the speed of 450 rpm at rated torque.

(b) A single-phase fully controlled rectifier is used as a power converter to supply a DC source of separately excited DC motor from 230 V, 50 Hz voltage source. The motor has rated value of 200 V, 800 rpm, 110 A with the armature resistance of 0.12 Q. Under continuous conduction mode operation, (i) If the motor running at speed of 550 rpm, examine the firing angle at rated motor torque. (ii) Suggest a new firing angle when the motor rotates inversely with the speed of 450 rpm at rated torque.

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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(b) A single-phase fully controlled rectifier is used as a power converter to supply a DC source of separately excited DC motor from 230 V, 50 Hz voltage source. The motor has rated value of 200 V, 800 rpm, 110 A with the armature resistance of 0.12 Q. Under continuous conduction mode operation, (i) If the motor running at speed of 550 rpm, examine the firing angle at rated motor torque. (ii) Suggest a new firing angle when the motor rotates inversely with the speed of 450 rpm at rated torque. (iii) Propose the additional component to be added in series with the armature circuit if it requires less torque ripple.
Transcribed Image Text:(b) A single-phase fully controlled rectifier is used as a power converter to supply a DC source of separately excited DC motor from 230 V, 50 Hz voltage source. The motor has rated value of 200 V, 800 rpm, 110 A with the armature resistance of 0.12 Q. Under continuous conduction mode operation, (i) If the motor running at speed of 550 rpm, examine the firing angle at rated motor torque. (ii) Suggest a new firing angle when the motor rotates inversely with the speed of 450 rpm at rated torque. (iii) Propose the additional component to be added in series with the armature circuit if it requires less torque ripple.
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