2. A 500-hp 600-volt compound motors operates at a speed of 495 rpm at full load. If the flux per poleis 9.1 x 10 maxwells and the armature resistance is 0.015 ohm. Calculate: a.) the counter emf; b.) the armature current .( Assume a value of k =1.3 x 10-7 and a brush drop of 5 volts): c.) If the load on the motor is increased so that the armature current rises to 800 A, at what speed will the motor operate, assuming that the flux inrceases 9 percent;
2. A 500-hp 600-volt compound motors operates at a speed of 495 rpm at full load. If the flux per poleis 9.1 x 10 maxwells and the armature resistance is 0.015 ohm. Calculate: a.) the counter emf; b.) the armature current .( Assume a value of k =1.3 x 10-7 and a brush drop of 5 volts): c.) If the load on the motor is increased so that the armature current rises to 800 A, at what speed will the motor operate, assuming that the flux inrceases 9 percent;
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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Please answer a-d. Thanks!
Transcribed Image Text:2. A 500-hp 600-volt compound motors operates at a speed of 495 rpm at
full load. If the flux per poleis 9.1 x 10 maxwells and the armature
resistance is 0.015 ohm. Calculate:
a.) the counter emf;
b.) the armature current .( Assume a value of k =1.3 x 107 and a brush
drop of 5 volts):
c.) If the load on the motor is increased so that the armature current
rises to 800 A, at what speed will the motor operate, assuming that the flux
inrceases 9 percent;
d.) When the load is removed, the speed rises to 560 rpm. What is the
percent regulation?.
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