WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC

Answers were Sorted based on User's Feedback



WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / k.prakashchandra

You can not have fixed north and south poles in the field
with AC

Is This Answer Correct ?    44 Yes 5 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / raja

When ac supply is provided, the poles will alternate between north and south pole for each half cycle of supply. so there wont be any magnetic interlocking with stator to run at synchronous speed as the polarity changes at the rate of supply frequency. hence for magnetic locking DC supply is used for excitation

Is This Answer Correct ?    18 Yes 0 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / sunit saini

the working principle of syn/mac. is mag. locking which is
not possible in ac

Is This Answer Correct ?    9 Yes 1 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / lokesh

We need a statoinary magnetic flux in synchronous machine,
this flux will be cut by the rotor.

Is This Answer Correct ?    7 Yes 7 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / anil

Yes we can have a ac in rotor.But then we will not call it as a rotor.It will be stationary but this rotor has to be connected to a 3phase supply .Then it will produce a rotating magnetic field which will interact with the stator and create emf.

Is This Answer Correct ?    0 Yes 3 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / ert

BT SUBMIITIN

Is This Answer Correct ?    1 Yes 14 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / shailesh_358

DC excitation provides high starting current required for
excitation

Is This Answer Correct ?    2 Yes 15 No

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC..

Answer / madhu

to make sym machine self starting

Is This Answer Correct ?    0 Yes 13 No

Post New Answer

More Electrical Engineering Interview Questions

Hello every one I am currently working in IT side but i have an offer to work under 'A' license holder and he says i can get c license what is the use of c license and what shall i do after getting it basically i am an electrical graduate please help me shall i leave this it job and work in electrical maintenance will i have a good future i am confused Thank You in Advance

1 Answers  


what are the type of motors

3 Answers  


what is extra low voltage system

3 Answers  


Why do u join toreent power ?

1 Answers  


Why is starter necessary for a three-phase induction motor?

37 Answers   BMM, Essar, Hero MotoCorp, ITI, Maruti Suzuki, Supertech, Watt,






can we connect both delta and star to the transformer secondary and for what reason?

5 Answers   Power Grid,


a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced to 100v,which bulb will give more light? and why with calculation?

12 Answers  


how to get electrical supervisor competency certificate in gujarat. i did 3 year diploma in electrical

0 Answers  


what is frequency response?

0 Answers  


all the technical question with answers pleas send your email id ramar_eee@yahoo.com

0 Answers   RRB,


Define the "All - Day Efficiency" of a Transformer

1 Answers   Transco,


hi i have applied for lic of india south cenrtal zonal ,hyd. i didnt get hall ticket till now.let me know how can i get form internet

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4452)
  • Electrical Engineering Interview Questions Electrical Engineering (16636)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)