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Question
what is the function of a commutator in a dc generator?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
it rectifies the output alternating current so as to produce
unidirectional alternating current i.e pulsating DC.it
reverse the negative polarity current to a positive one so
as the output is a pulsating DC
 
Is This Answer Correct ?    71 Yes 6 No
Ravi Ranjan Gupta
 
Answer
# 2
Generally all types of generators induced emf in sinusoidal
wave form (A.C). In particularly D.C generator commutator
function is convert A.C emf into D.C.
 
Is This Answer Correct ?    33 Yes 10 No
Jsenthamizh
 
 
 
Answer
# 3
its function is like a rectifier(ac to dc converter) 
Is This Answer Correct ?    19 Yes 6 No
Ashokreddy.r
 
Answer
# 4
in generator only alternating current is produced so to
making it unidirectional we use commutators it acts like a
rectifier to convert ac to pulsating dc
 
Is This Answer Correct ?    11 Yes 2 No
M.srinivas Manoj
 
Answer
# 5
COMMUTATOR IS WORKING AS A RECTIFIER.IN DC MOTOR IT'S USED
TO CONVERT THE AC TO DC.
 
Is This Answer Correct ?    11 Yes 5 No
Gururaj
 
Answer
# 6
It converts alternating current to unidirectional current
and also provied point for collection of current.
 
Is This Answer Correct ?    7 Yes 2 No
Venkatesan.j
 
Answer
# 7
the function of commutator is to lead current from external stationary leads to the rotating coils of the armature winding in case of motor and to draw current from armature winding to external circuit in case of generator
basically it act as a rectifier as it converts sinusodial(a.c.) signal into d.c signal
 
Is This Answer Correct ?    3 Yes 0 No
Vindhya Vasini
 
Answer
# 8
it rctifires the voltage of the generator and it in half
cycle
 
Is This Answer Correct ?    5 Yes 7 No
S
 
Answer
# 9
why do DC motor that use brushes require more repair than motor that do not use brushes? 
Is This Answer Correct ?    0 Yes 3 No
Rafael
 
Answer
# 10
I DONT THINK ITS RECTIFIENG. ITS JUST A CONDUCTOR BUTWEEN
COILS AND BRUSHES.
 
Is This Answer Correct ?    1 Yes 11 No
Sennapparajan
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
Whether capacitor loads can be connected for testing a diesel engine at its full load capacity? Is there any limitation of capacotir load? Which is the best load for testing DG sets?   2
How we can find the regulation of transformer?   1
how would you come to know if a transformer is double wound or auto? note that there is no tag. you are given only a multimeter.   5
How can we get d.c series motor characteristics by using a.c induction motor? IIT 1
How to measure corona loss in a transmission line?(Plz ans only if u know the exact answer)   3
Why generating voltage is limited up to 22kV?   4
Is there any difference between circuit breakers and isolators   6
what is the CT of protection and CT of metering ? what is class 5P10 & 5P20 and class PS ? ONGC 13
Whet is IGBT.How it teste   2
Maximum efficiency occurs in electrical machines is at i)Full load,ii)50% of full load,iii)Near full load,iv)None of these IFFCO 1
what are corona losses Siemens 3
220/33kv voltage level having 60MVA rating , which transformer is preferred two winding or auto transformer. why, kindly provide your strong technical valuable views.   1
 
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