Answer / coolsunil56

dc excitation is given to rotor so that it gets magnetised and gets locked with magnetic revolving field of statorand start rotating with same speed means at synchronous speed.

Answer / k.sri405

dc can produced flux but it is constant in nature so magnet
have constant pole. that's why this pole gets locked with
the poles of stator

Answer / kundanmalani1990

Excitaion r use to the pole r converte to the parmanet magnet so the excitation r use

Answer / naveen

D.C Supply in alternater  used for genarating magnatic field in roter ,But nature of field would be Stationary Not fluctuating, when Roter get speed from prime mover  its Induced VOLTAGE AND CURRENT in Armature. 

Answer / vamsi

ac alternator is not a salf stator so dc supply for self
motor,dc can not produce flux.

what is the AC Plant and how can do the work with parts and picture tell us 150 Tr

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Can the Neutral and Body Earthpits of a transformer conncted together by Earth strips under ground.

4 Answers   SanDisk,

for distribution line ratio of x/r 1.<0.1 2.>10 3.>1 4.<0.01

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Why we are mention U1, V1, and W1 in primary side of transformer give technical reason

1 Answers  

What is the difference between UPS and SMPS?

7 Answers   Mukand, NightFox,

why does in transformer the v/f ratio constant?

2 Answers   TATA,

Is it possible to connect a dYN1 transformer in parallel with a YNd11 transformer.

4 Answers  

what is power factor when in view of a lineman

3 Answers   KSEB,

why phase always came one direction in 5pin socket(right hand or left hand) which direction and why..........?

4 Answers   Alstom, L&T,

I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

0 Answers   MindSquare, Sical,

How dia computation perfomed in cold rolling mills .

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How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.

0 Answers