Q3:A: The nameplate rating of a shunt motor is 150 hp, 600 volts, 205 amp, 1,700 rpm. The resistance of the shunt field circuit is 240 ohms, and the total armature circuit resistance is 0.15 ohm. The motor has a commutating winding, and armature reaction is neglected. (a) Calculate the full-load efficiency of the motor and the speed regulation. (b) Calculate the efficiency and the delivered torque when the motor draws half-load current from the line. (c) If the motor is to deliver full-load torque at 1,200 rpm, what value of resistance must be added to the armature circuit ?
Q3:A: The nameplate rating of a shunt motor is 150 hp, 600 volts, 205 amp, 1,700 rpm. The resistance of the shunt field circuit is 240 ohms, and the total armature circuit resistance is 0.15 ohm. The motor has a commutating winding, and armature reaction is neglected. (a) Calculate the full-load efficiency of the motor and the speed regulation. (b) Calculate the efficiency and the delivered torque when the motor draws half-load current from the line. (c) If the motor is to deliver full-load torque at 1,200 rpm, what value of resistance must be added to the armature circuit ?
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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