Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...


what is the principal of starting of a three phase induction
motor.

Answers were Sorted based on User's Feedback



what is the principal of starting of a three phase induction motor...

Answer / iamdon

When a 3 phase balanced supply is given to the 3 phase
balalced sator winding,a rotating magnetic field of
constant amplitude is produced.

Rotating field cuts the stationary rotor conductor.So emf
induced in conductor according to Faraday's laws.The rotor
conductors are short circuited.So current starts flowing in
conductor according to Lenz law.

As we know the EFFECT will always OPPOSE THE CAUSE.Here the
EFFECT IS THE CURRENT INDUCED and the CAUSE IS RELATIVE
MOTION between rotating magnetic field and stationary
conductor on rotor.So the torque acting on the rotor
conductor is in such a way that it will oppose the cause.So
rotor starts rotating in the SAME DIRECTION as that of
rotating magnetic field as long as there is relative motion
between two.Rotor will never catch the field so it continue
to run.Due to this reason Induction Motor is self starting.

This principle is similer to transformer.Hence Induction
motor is also called as Rotating Transformer.

Author:arbelectbit@yahoo.com

Is This Answer Correct ?    8 Yes 0 No

what is the principal of starting of a three phase induction motor...

Answer / jain c

The three phase induction motor is a self starting one as
the three phase supply produces the rotating magnetic field.

Is This Answer Correct ?    2 Yes 0 No

Post New Answer

More Electrical Engineering Interview Questions

why slipring motor , at full speed run as squirrel cage motor?

1 Answers  


Why we use 2core cable for Dc motor.Can I use 3core?

5 Answers   JK Paper, Maharaja Whiteline,


Why reverse relay used

2 Answers   cpgn,


sigal phase supply is 230 v ac two phase supply is 415 v ac then why three phase supply having supply is 415 v ac why not 690v ac

2 Answers  


ow can i get certificate of competency as electrical supervisor and my diploma in electrical engineering from jalgaon.

0 Answers   ONGC,






WHAT IS THE TOTAL POWER GENERATION IN CHHATTISGARH?

0 Answers  


Why electrical heaters are not provided with overload relays in circuits

1 Answers  


Why short circuit calculation is not required in LT cable sizing and requiredin HT cable sizing only

2 Answers   Chemtex,


I want single line diagram for AMF & DG syncronizing panel

0 Answers  


How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

0 Answers  


r we are using in gas turbine mark (5) frame (6) (made in india Bhel 1997) &#256;

0 Answers  


What is diversity factor and how to calculate it

2 Answers   Al Faraa, Amul, Pentagon, Sobha Developers,






Categories
  • Civil Engineering Interview Questions Civil Engineering (5074)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4444)
  • Electrical Engineering Interview Questions Electrical Engineering (16594)
  • Electronics Communications Interview Questions Electronics Communications (3915)
  • Chemical Engineering Interview Questions Chemical Engineering (1092)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (214)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (258)
  • Instrumentation Interview Questions Instrumentation (2986)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (123)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (0)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1377)