Untitled SectionWhich of the statement is true about 3-phase induction motor (IM) ?Ns: Synchronous speedThe rotor magnetic field of IM rotates at Nsbut stator magnetic field rotates at less thanNsBoth rotor magnetic field and stator magneticfield rotates at NsThe rotor magnetic field of IM rotates at thespeed less than Ns but stator magnetic fieldrotates at Ns.Both rotor magnetic field and stator magneticfield rotates at the speed less than NsThe magnitude of the flux in the air-gapof 3-phase induction motorisNoneDepends on the slip of induction motorDepends on the phase sequenceDepends on supply frequency

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Which of the statement is true about 3- phase induction motor (IM) ? Ns: Synchronous speed

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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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

Untitled Section
Which of the statement is true about 3-
phase induction motor (IM) ?
Ns: Synchronous speed
The rotor magnetic field of IM rotates at Ns
but stator magnetic field rotates at less than
Ns
Both rotor magnetic field and stator magnetic
field rotates at Ns
The rotor magnetic field of IM rotates at the
speed less than Ns but stator magnetic field
rotates at Ns.
Both rotor magnetic field and stator magnetic
field rotates at the speed less than Ns
The magnitude of the flux in the air-gap
of 3-phase induction motor
is
None
Depends on the slip of induction motor
Depends on the phase sequence
Depends on supply frequency

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