A 150 hp, 600 volt, 600 rpm de series-wound railway motor has a combined field and armature resistance (including brushes) of 0.165 N. The full-load current at rated voltage and speed is 186 amps. The magnetization curve at 400 rpm is as follows: Generated emf (V) 375 400 425 450 Field current (A) | 169 | 194 | 225 | 261 | 300 475 Determine the internal starting torque when the starting current is limited to 400 amps. Assume the armature reaction to be equivalent to a demagnetizing mmf which varies with the square of the current. (Note: 1 hp = 746 W.)
A 150 hp, 600 volt, 600 rpm de series-wound railway motor has a combined field and armature resistance (including brushes) of 0.165 N. The full-load current at rated voltage and speed is 186 amps. The magnetization curve at 400 rpm is as follows: Generated emf (V) 375 400 425 450 Field current (A) | 169 | 194 | 225 | 261 | 300 475 Determine the internal starting torque when the starting current is limited to 400 amps. Assume the armature reaction to be equivalent to a demagnetizing mmf which varies with the square of the current. (Note: 1 hp = 746 W.)
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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