why the field winding of synchronous machine is excited by dc source
Answers were Sorted based on User's Feedback
The field wdg is placed on rotor of an synchronous machine
is exicited with dc source.when the exicitation is given to
rotor of the field wdg in its current will flow. so this
current setup an flux which expernice the torque will be
setup on rotor.acc to the farady law of electro magnetic
induction. at the same time revoluoing flux will be setup
on the aramature wdg.so that the stator aramature flux of
the mmf and stationary fileld flux will not be zero.after
certain speed the magntic locking tendcy will come to
picturei.e stator and rotor poles will be magentic inter
locking so that it will rotate with synchronous speed.
If rotor field wdg is is exicited with Ac source, in wdg
alternating flux will be setup on rotor.that the stator
aramature flux of the mmf and stationary fileld flux will
zero so that the machine does not provide any output
Is This Answer Correct ? | 2 Yes | 1 No |
WHAT IS REACTIVE POWER?
what is meant by skew width in machines?
diffrence between alternating and pulsating field?
There are 2 Flip_Flop with logic between them. Given Clock to Q delay, logic prop. delay, set up and hold times specify maximum clock frequency of system. What happens if second output fed back to first input. Any changes? What happens with timing if second output is fed back to logic between the flops? Good Luck!
we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?
What is corona loss?
The power dissipated by a resistor of 10ohm when a current of 2A passes through it is:(a) 0.4W(b) 20W(c) 40W(d) 200W
HOW TO CALCULATE THE DOMESTIC POWER FACTOR?
what type of earthing do for dry fissure rock?
why conductors of low tensile strength 1)produce greater sag and 2)can not be used for larger spans
what is principle operation of transformer?
what is megar healthy value for ht < cables