In an induction motor slip will be negative when the _________ a) rotor rotates at speed more than synchronous speed and in the direction of the rotation of stator field b) stator magnetic field and rotor rotate in opposite direction c) rotor rotates at speed less than synchronous speed and in the opposite direction of the rotation of stator field d) rotor rotates at speed more than synchronous speed and in the opposite direction of the rotation of stator field

In an induction motor slip will be negative when the _________ a) rotor rotates at speed more than synchronous speed and in the direction of the rotation of stator field b) stator magnetic field and rotor rotate in opposite direction c) rotor rotates at speed less than synchronous speed and in the opposite direction of the rotation of stator field d) rotor rotates at speed more than synchronous speed and in the opposite direction of the rotation of stator field

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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Question

In an induction motor slip will be negative when the _________
a) rotor rotates at speed more than synchronous speed and in the direction of the rotation of stator field
b) stator magnetic field and rotor rotate in opposite direction
c) rotor rotates at speed less than synchronous speed and in the opposite direction of the rotation of stator field
d) rotor rotates at speed more than synchronous speed and in the opposite direction of the rotation of stator field

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Type your question here Calculate the frequency of rotor current for six pole, 3-phase induction motor running at 950 r.p.m is supplied by a synchronous generator having four poles and running at 1500 r.p.m.