A three phase induction motor with supply frequency of 60 Hz , 6 poles. If the slip is 3 % at a certain load, determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced e.m.f in the rotor and (d) speed of the induction motor if the slip changes to 6.75 %

A three phase induction motor with supply frequency of 60 Hz , 6 poles. If the slip is 3 % at a certain load, determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced e.m.f in the rotor and (d) speed of the induction motor if the slip changes to 6.75 %

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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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

A three phase induction motor with supply frequency of 60 Hz , 6 poles. If the slip is 3 % at a certain load,
determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced e.m.f in
the rotor and (d) speed of the induction motor if the slip changes to 6.75 %
Synchronous speed
Speed of the rotor
frequency of the rotor emf
speed of the induction motor if the slip changes to 6.75 %

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