A three phase, 60 Hz, 6-poles induction motor has a full-load speed of at 1150 rpm and delivers constant torque. If we reduce the speed of this motor to 960 rpm with adding external resistance to its rotor circuit, what would be the ratio of rotor losses at this speed to rotor losses at full-load speed?
A three phase, 60 Hz, 6-poles induction motor has a full-load speed of at 1150 rpm and delivers constant torque. If we reduce the speed of this motor to 960 rpm with adding external resistance to its rotor circuit, what would be the ratio of rotor losses at this speed to rotor losses at full-load speed?
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter35: Harmonics 916
Section: Chapter Questions
Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
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![A three phase, 60 Hz, 6-poles induction motor
has a full-load speed of at 1150 rpm and
delivers constant torque. If we reduce the
speed of this motor to 960 rpm with adding
external resistance to its rotor circuit, what
would be the ratio of rotor losses at this speed
to rotor losses at full-load speed?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F50310995-94a3-467e-84f0-b5ebea372bed%2F2632a9e6-cdca-4de8-9067-c00ca7687f54%2F8dyts42_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A three phase, 60 Hz, 6-poles induction motor
has a full-load speed of at 1150 rpm and
delivers constant torque. If we reduce the
speed of this motor to 960 rpm with adding
external resistance to its rotor circuit, what
would be the ratio of rotor losses at this speed
to rotor losses at full-load speed?
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