why the field winding of synchronous machine is excited by dc source

Answers were Sorted based on User's Feedback



why the field winding of synchronous machine is excited by dc source..

Answer / nikhil

To Provide the stationary Field.......

Is This Answer Correct ?    2 Yes 0 No

why the field winding of synchronous machine is excited by dc source..

Answer / siva naik

The field wdg is placed on rotor of an synchronous machine
is exicited with dc source.when the exicitation is given to
rotor of the field wdg in its current will flow. so this
current setup an flux which expernice the torque will be
setup on rotor.acc to the farady law of electro magnetic
induction. at the same time revoluoing flux will be setup
on the aramature wdg.so that the stator aramature flux of
the mmf and stationary fileld flux will not be zero.after
certain speed the magntic locking tendcy will come to
picturei.e stator and rotor poles will be magentic inter
locking so that it will rotate with synchronous speed.

If rotor field wdg is is exicited with Ac source, in wdg
alternating flux will be setup on rotor.that the stator
aramature flux of the mmf and stationary fileld flux will
zero so that the machine does not provide any output

Is This Answer Correct ?    2 Yes 1 No

Post New Answer

More Electrical Engineering Interview Questions

what happend if we remove dc exciter from moving machine..: gg

4 Answers  


during parallel operation of two ac generator which condition must match before taking both parallel i.e speed /voltage rating /kva/exciation

2 Answers  


why the electric train touches only one conductor n where is the neutral n it will be running 3-phase or 1-phase?

3 Answers  


How we can determine short circuiting current any plant and for example a plant which power generation is 415 volts and plant load is 500 kw.

0 Answers  


What can you contribute to the progress of our Company as an employee if you are selected?

0 Answers  






how to select the isolation tranformer for siemens 802dsl cnotroller

0 Answers   Siemens,


why the transformer neutral earthing is to be done by copper flat only,if we use GI flat what is the disadvantage.

2 Answers  


11kv = LT 440v , how many amp.supose 440v side 5000 amp curent drown

2 Answers   Motwane,


The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?

0 Answers  


If I want to buy a new Xformer for my plant what are the main parameter will I need to check?

0 Answers  


Explain and give me an example of a time when you had to explain some new procedures to your co-workers for quality service delivery, how did you go about it?

0 Answers  


we have one ups its neutral is not earthed.its one distribution MCB has a earth fault.but we can not put off any MCB.so how to find out that in which circuit is earthed without isolating the breaker.

3 Answers   CFCL,


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • 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)