Why DC excitation is used for alternators? Why cant it be AC?
Answer Posted / samy
DC supply gives constant , steady magneticflux.
but AC supply gives an alternating flux. so in alternators
field give to dc supply.
| Is This Answer Correct ? | 9 Yes | 21 No |
Post New Answer View All Answers
Please provided formula for calculate the cable size from step up transformer to M.V panel, run overhead aluminum cables, total load is 5mega watt, total length 900 feet.
Why derating factor os applied on Cables?
it is possible to rotate the DG engine dc starter with wrong polarity connections? why?
Why can't we take NO LOAD TRIAL of motors having V1 mounting??
Give the topology of current amplifier with current shunt feedback?
define the active power?
why the value of k is more in shell typr transformers?
Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB
how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?
what is the mechanical safety of DG ?
either water sensor or flow meter,how we observe the water level, f any other equipment are in market ?
What tests should i carry over on a newly rewinded DC Generator with voltage rating of 38 volts and current rating of 350 amps, to certify that the machine is OK?
What is earth?
What current position are you holding in your current company?
Explain cmrr?