B3. A three-phase, 60 Hz 4-pole induction motor has a slip of 0.05 when the output is 30 kW. Thefrictional loss at shaft is 300 W.Calculate the following:(i) the rotor speed in r.p.m.(ii) the torque delivered by the rotor.(iii) the torque delivered to the rotor.(iv) the rotor IR loss.

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Answered: B3. A three-phase, 60 Hz 4-pole…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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B3. A three-phase, 60 Hz 4-pole induction motor has a slip of 0.05 when the output is 30 kW. The frictional loss at shaft is 300 W. Calculate the following: (i) the rotor speed in r.p.m. (ii) the torque delivered by the rotor. (iii) the torque delivered to the rotor. (iv) the rotor IR loss.