Why DC excitation is used for alternators? Why cant it be AC?
- 35 Answers
- 69915 Views
- ABB, Ace Info, Alstom, Shalivahana Power, I also Faced
- E-Mail Answers
Answer Posted / hitch
1-the dc current produce constant field
2-the ac produce more eddy currents means temprature rise
3-ac produce harmonics more than dc
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What happens to a motor if it is connected in Delta connection
what is the role of energy meter in distribution system ?
We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......
What will be the fault current of any system when its generation is 10% of BASE generation( FUll Load )?Will is 10% or the same as full base calculation?
What is the drawback of class b amplifier? How is this minimized?
What is stepper motor?
what is JE exam?
how do u gauge the size of the cable ?for eg. consider a 300 sqmm L.T Cable.How do u determine the size of the cable seeing it pratically?
Explain how to determine capacitor tolerance codes?
how oltc works in rectiformers of higher rating (27 mva,200v dc,120kamps) please provide me full information with diaggram.
what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????
In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?
What is the resonant peak?
why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?
what is meant by poly phase induction motor ? how its operating by single phase or three phase?
