Induction Motor Objective Questions

February 20, 2018

Induction motor will become synchronous motor. When the 3 phase stator windings are fed by 3 phase supply a magnetic flux of constant magnitude which is rotating at synchronous speed is set up.

3 Q Induction Motor

Hybrid Algorithmic Approach Oriented To Incipient Rotor

Starting Methods Of Induction Motor Your Electrical Guide

Induction motor interview questions 1.

Induction motor objective questions. The basic idea behind the double field revolving theory is that any alternating quantity can be resolved into 2 equal components rotating component of same strength which is revolving at the same speed but in opposite direction. Or why does the rotor rotate. The field produces by the single phase induction motor can be explained by double revolving field theory.

A it has no external electrical connections to its rotor b a three phase supply is connected to its stator c a magnetic flux which alternates is produced. Yes they are very helpful. For this reason the pf of a lightly loaded 3 phase induction motor is very low.

Polyphase induction motor mcq with explanation in case of 3 phase induction motors the ratio of core length to pole pitch for minimum cost is taken as. The frame of an induction motor is usually made of. 3 phase induction motors related mcq objective questions with answers 1 which of the following statements about a three phase squirrel cage induction motor are false.

Home category electrical engineering mcq questions and answers 3 phase induction motors 1 the frequency of the induced emf in an induction motor is a. The no load current lagging the applied voltage by a large angle. Solved objective questions from induction motors 1 the crawling in an induction motor is caused by a improper design of the machine b low voltage supply c high loads d harmonics developed in the motor.

Question set 09. Induction motor objective questions with answers electrical mcq edit practice test. Consequently the electric current drawn by the motor on no load is largely magnetizing current.

These mcqs are popular and regularly asked. Polyphase induction motor mcq with explanationobjective type question of an induction motor. It is advisable to avoid line starting of induction motor and use starter because a it will run in reverse direction b it will pick up very high speed and may go out of step.

How does the induction motor work. If rotor runs at synchronous speed then there will be no flux cutting between stator and rotor and hence no emf will be produced and as a result there will be no electric current flowing through the rotor and consequently rotor torque will be zero. Because of air gap the reluctance of the magnetic circuit of 3 f induction motor is very high.

Most important mcq or objective questions on induction motor are discussed in this page.