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Question
why dc supply given to ac alternator rotor
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
It is always better to give DC supply to the field then
only we can get continuous output i.e sine wave from the
stator of an alternator.
 
Is This Answer Correct ?    8 Yes 0 No
G .senthilkumaran
 
Answer
# 2
the dynamical induced emf needs a constant flux i.e time
invarient flux
if we give the ac input it produces alternating flux in the
rotar field and dc current not producec e.m.f. is induced
so the
electrical power will be zero
 
Is This Answer Correct ?    2 Yes 0 No
Hansraj
 
 
 
Answer
# 3
the dynamical induced emf needs a constant flux i.e time
invarient flux
if we give the ac input it produces alternating flux in the
rotar field and then there is no emf is induced so the
electrical power will be zero
 
Is This Answer Correct ?    3 Yes 3 No
Veeru
 

 
 
 
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