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A separately excited D.C. motor is driven from a 240 V, 50 Hz, 1-o supply using fully controlled thyristor bridge. The motor has an armature resistance of 1 2 and armature voltage constant 0.8 V-s/rad. Assume armature current is constant. The speed of the motor delivering 42.4 N-m load torque at 30° firing angle is approximately equal to (a) 1000 rpm (c) 1600 rpm (b) 1200 rpm (d) 2230 rpm

A separately excited D.C. motor is driven from a 240 V, 50 Hz, 1-o supply using fully controlled thyristor bridge. The motor has an armature resistance of 1 2 and armature voltage constant 0.8 V-s/rad. Assume armature current is constant. The speed of the motor delivering 42.4 N-m load torque at 30° firing angle is approximately equal to (a) 1000 rpm (c) 1600 rpm (b) 1200 rpm (d) 2230 rpm

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 separately excited D.C. motor is driven from a 240 V, 50 Hz, 1-o supply using fully controlled thyristor bridge. The motor has an armature resistance of 12 and armature voltage constant 0.8 V-s/rad. Assume armature current is constant. The speed of the motor delivering 42.4 N-m load torque at 30° firing angle is approximately equal to (a) 1000 (c) 1600 rpm (b) 1200 rpm (d) 2230 rpm rpm
Transcribed Image Text:A separately excited D.C. motor is driven from a 240 V, 50 Hz, 1-o supply using fully controlled thyristor bridge. The motor has an armature resistance of 12 and armature voltage constant 0.8 V-s/rad. Assume armature current is constant. The speed of the motor delivering 42.4 N-m load torque at 30° firing angle is approximately equal to (a) 1000 (c) 1600 rpm (b) 1200 rpm (d) 2230 rpm rpm
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