(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.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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