The field and armature resistances of a 231V series motor are 0.1 ohm and 0.2 ohm, respectively. The motor takes line current of 32 A while running at speed of 700 rpm. If the total iron and friction losses are 428 W, determine the motor efficiency in percent. Answer:

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter30: Dc Motors
Section: Chapter Questions
Problem 19RQ: A motor is operating a load that requires a torque of 750 lb-in. and is turning at a speed of 1575...
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The field and armature resistances of a 231V series motor are 0.1 ohm and 0.2 ohm, respectively. The motor takes line current of 32 A while running at speed of 700 rpm. If the total iron and friction losses are 428 W,
determine the motor efficiency in percent.
Answer:
Transcribed Image Text:The field and armature resistances of a 231V series motor are 0.1 ohm and 0.2 ohm, respectively. The motor takes line current of 32 A while running at speed of 700 rpm. If the total iron and friction losses are 428 W, determine the motor efficiency in percent. Answer:
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