Answer Posted / tahir bhatti
as the flux produce by a single phase alternates +ve and -ve. during +ve half cycle of flux, rotor of the motor try to move to one side to couple its megnetic poles to the stator poles (stator poles change at 50c/sec) but the next half cycle it try to move the other side to couple its megnetic poles to the stator poles, due to inertia and fastly change in megnetic pole does not allow the rotor to couple its megnetic poles to the stator alternating pole which results the failure of motor rotation. capacitor produce a split phase which make its own alternating flux 90 degree to the parent flux. thus as the orignal flux comes to its peak +ve value the split flux value become 0 degree.the rotor try to rotate one side and as the orignal flux comes to 180 the split flux by the capacitor comes to 90 and try to couple the megntic fields of rotor and stator.thus the rotor rotates
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
Can any body tell me the different types of LT cables & their application.
how make megger test for control cable like 12c x 1.5mm and what it apply voltage and test timing details.
what is tri state logic gate
What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.
how to CHECK CT AND PT AT THE FAULT OCCUR IN GENERATOR RELAY PANEL .
WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.
What is meant by derating factor?
what is 400kv doble circuit quadpole tower?
why output is out of phase in case of common emitter?
what are the analog quality input for protection function?what are minimum reqiments?
how many current required for hypo test
if in 3-phase system voltage=440V,frequency=60Hz, current=400A. then if it is single phase then current=? and if it is single phasing then current=?
which type of effect of turbine and generator reverse power protection ?
how you will decide the distance between the power transformer and its fencing
how to calculate the tarriff for an industry whose kva demand is 10 mva
