why commutator is attached with only dc macine
Answer Posted / dany
Commuttor is vital part in especially DC machines.
it is the place where commutation will be take
place ,commutation means reversal of current direction in
current carriying armature coils or simply conversion into
DC .
SINCE in AC machines there is no need of DC output we dont
use commutators
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me
apti mainly on logical reasoning, verbal and non-verbal ability (70 percent) and remaining technical. I was in ee but technical had mech ques like on turbines and welding.
What is the tube exial fan?
what is the use of vcb & isolator in substation?
I have a current transformer with 1 main reading meter with transformer outside the building and a control panel having 5 CT reading meters with black round coils inside the building. I want to know, A) when current pass through the Transformers, will the current be reduced or be the same and after that B) when current pass through the CT meters with black round coils, will the current be reduced or be the same. C) in the above process will the reading of the main meter be same or different, from the total reading of all the 5 CT meters.
If two Transformers are connected in parallel having impedance of 50KA in both transformers will the impedance increase or decrease after connecting transformers in parallel?
What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)
which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor
description about dry type transformers
Why High voltage are generate noise ?
Any one who apply for Ferro Scrap Nigam Limited cn join with me at rajuhalder@indiatimes.com or 09669717028
what are pilot cells
Dear sir, By which formula u can calculate for a particular kv line there is a range of mw.
working principle of oil startar
WHY CBCT USE ONLY IN Y PHASE NOT OTHER PHASES