why dc supply given to ac alternator rotor

Answer Posted / hansraj

the dynamical induced emf needs a constant flux i.e time
invarient flux
if we give the ac input it produces alternating flux in the
rotar field and dc current not producec e.m.f. is induced
so the
electrical power will be zero

Is This Answer Correct ?    2 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what is die electric strnth of transformer ?

1642


Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please...

2503


Why transformer used in UPS??

1027


what is the function of statics switch in ups and tell me parts

1521


HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????

1682






How to test the Secure Elite 440 Multi function meter working condition.

1606


why it is not advisable to run low rating (19KVA) DG sets in parallel for long durations even though they are provided with droop ckts (QDC)

1466


what is lumped and distributed elements?

1543


Explain the propagation of harmonics in the network and influence of phase angle of harmonics.

1494


I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?

1740


what is the use of Auto re-closer?

1641


What is the limitation of kirchoffs law?

642


How is the speed of a DC shunt motor related to the armature current?

669


How to calculate earth fault current for 6.6 KV , 50 HZ , 756 Amps , 3000 RPM , 0.8 PF generator

1606


Inductor and capacitor........power in one phase and ...... in it another phase.

1597