Why DC excitation is used for alternators? Why cant it be AC?

Answer Posted / mohankumar n

to avoid super imposition of rotor & stator frequency. From
MOHANKUMAR N Eectrical Engineer Power plant.Sankeshwar
Belgaum (D) Karnataka State.

Is This Answer Correct ?    4 Yes 4 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

When and where resistance earthing is used ? How to calculate the time constant for earth fault

1341


what & how to check the lightning arrester

1461


How to calculate the Harmonics losses in terms of cost/unit.

1559


What is MS-EXCELL?

1667


Explain how you intend to work under pressure to meet up with deadline target?

4720






What is Phase margin?

654


Hi Friend I am used multimeter to measure the voltage between R Phase(SS1) to R Phase(SS2). In SS1 is connected with UPS loads. But I am getting voltage between these 2 R Phases. Please give some idea friend

1514


What is the range of the stator resistance of 3 phase induction motor?

1459


i need some project topics along with circuit diagram in the electrical adnd electronics engg and also give ome website regarding projects.my mail id is thenmozhi2k7@gmail.com .please help me.

1453


draw vector diagram and +ve,zero sequence diagram of symmetrical three phase fault.

1495


If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

994


I have motor of 3 H.P. How i found the rating of capacitor use in it in single phase motor..???

2141


How to design the no. of ceiling fans required in 5mtr X 10 mtr X 3 Mtr hight room?

1691


during installation time of transformer and alternator which points we have to observed?

1492


Define characteristics impedance?

673