Answer / manoj kmr

synchronous motor works on the principle of magnetic locking. when two
unlike poles are brought near each other if the magnets are strong there
release a force of attraction b/w those two poles in that condition magne
ts are said to be magnetic locking .
if one of the two magnets is rotated the other one also rotate with same
direction and speed due to force of attraction

Answer / devsingh boda

A synchronous motor always runs at synchronous speed,because
of MAGNETIC LOCKING phenomenon.
In syn motors the armature poles(rotor poles) are
physically designed(located) on the rotor as we see in
salient pole syn machines.But whenever ac supply is given to
the stator winding windings , a rotating magnetic field Or
rotating magnetic poles (stator field or stator poles) are
created itself which rotates at syn speed.Any particular
stator pole attracts the rotor pole which in sign
opposition ie, stator N attracts rotor S and stator S
attracts rotor N.As a particular stator pole moves at syn
speed , the rotor pole that is attracted by that particular
stator poles also move at syn speed.This phenomenon is
called magnetic locking.Because of this magnetic locking the
rotor always rotates at syn speed...

Answer / devsingh boda

: In syn motors the armature poles(rotor poles) are
physically designed(located) on the rotor as we see in
salient pole syn machines.But whenever ac supply is given to
the stator winding windings , a rotating magnetic field Or
rotating magnetic poles (stator field or stator poles) are
created itself which rotates at syn speed.Any particular
stator pole attracts the rotor pole which in sign
opposition ie, stator N attracts rotor S and stator S
attracts rotor N.As a particular stator pole moves at syn
speed , the rotor pole that is attracted by that particular
stator poles also move at syn speed.This phenomenon is
called magnetic locking.Because of this magnetic locking the
rotor always rotates at syn speed...

how we identify between current transformer and potential transformer without having it name plate?

5 Answers   L&T, TATA,

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A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........

1 Answers  

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Differentiate between kirchhoff’s first law and kirchhoff’s second law?

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respetsed sir, i have applied for section engg and juniour engg for both chennai and tiruvunabthapur boards for electrical deportments . can u suggest what books i have to follow and and also from which sections they r going ask (i mean weightage and what topics i have to cover) for both se and je for both chennai and tiruvunanthapur boards.......

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What is a diode?

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What is sensitivity of a measurement?

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What will happen if mains neutral and generator neutral shorted?

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