Interested to Buy Any Domain ? << Click Here >> for more details...
Why DC excitation is used for alternators? Why cant it be AC?
- 35 Answers
- 79242 Views
- ABB, Ace Info, Alstom, Shalivahana Power, I also Faced
- E-Mail Answers
Answer Posted / roy
AC itself produces alternating flux ,so If u gives AC to the
field coil the generator will give transformer action.there
is no need of rotating it.
In case if we rotate the field ,constant field will not be
produced.For every cycle of rotation ,there will continuous
change in the pole wrt 3 wdg of armature,result in irregular
waveform.we cannot get pure sinusoidal 3 phase supply.
so to overcome from above, dc excitation is given so that
constant field strength will be maintained.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
All the socket in a room become very hot, the Wall was also became very hot and the earth conductor also became live, what in your view might be the possible causes?
Why should be the frequency 50 hz 60hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 hz 60hz?
Why compensation is necessary in feedback control system?
If a surge divertor is required to be protected by 32 amp C Curve Circuit breaker does this limit the amount of protection from surges that you will acheive
How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V
I am apply the AAI. So i want electrical sample question paper in technical with answer my id is vijayjobsmart@gmail.com
How to calculate Grid rotor resistance(GRR) losses in slip ring induction motor?
Why i receive the GCU fault in my DG Sychronization panel . what all the factors considered for this fault .
hey guys help me out.....what are the industrial uses/functions of nozzles in industries
what is meaning of bus riser
what is x'mer ,isolation x'mer & yltra-isolation x'mer?????
how to identify conection leads of an unknown electric motor
what are the 4 rules to start the motor?
what are the stresses in circuit breakers ?
why are the maintaine power factor and how can this control and this is how work.
