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A 240V , Shunt DC - motor delivers power to a load at 1200 Rev / Min . The load Torque drawn by the motor is 320 N.m. The armature resistance is 0.3 Ohm and the field resistance is 100 Ohm and the rotational losses are 500W . a. What are the armature current and the efficiency ? b. If the torque decreased to be 250 N.m find the speed !

A 240V , Shunt DC - motor delivers power to a load at 1200 Rev / Min . The load Torque drawn by the motor is 320 N.m. The armature resistance is 0.3 Ohm and the field resistance is 100 Ohm and the rotational losses are 500W . a. What are the armature current and the efficiency ? b. If the torque decreased to be 250 N.m find the speed !

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
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A 240V , Shunt DC - motor delivers power to a load at 1200 Rev / Min . The load Torque drawn by the motor is 320 N.m. The armature %3 resistance is 0.3 Ohm and the field resistance is 100 Ohm and the rotational losses are 500W. a. What are the armature current and the efficiency ? b. If the torque decreased to be 250 N.m find the speed !
Transcribed Image Text:A 240V , Shunt DC - motor delivers power to a load at 1200 Rev / Min . The load Torque drawn by the motor is 320 N.m. The armature %3 resistance is 0.3 Ohm and the field resistance is 100 Ohm and the rotational losses are 500W. a. What are the armature current and the efficiency ? b. If the torque decreased to be 250 N.m find the speed !
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