A 24 poles, 50Hz, three phase induction motor develops a full load torque at245 rpm. The rotor has a resistance of 0.02 2 and 0.27 Q of standstill reactaniceper phase. Calculate :1- the ratio of maximum torque to full load torque?2- the ratio of starting torque to full load torque?3-speed at maximum torque?

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Answered: A 24 poles, 50Hz, three phase induction…

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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A 4-pole, 50-Hz induction motor has a full-load slip of 5%. Each rotor phase has a resistance of 0.3 Ω and a standstill reactance of 1.2 Ω. Find the ratio of maximum torque to full-load torque and the speed at which maximum torque occurs.
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