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Why synchronous motor runs at a fixed speed?
what is the name of that fixed speed?
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Answer Posted / guest
Synchronous motor runs on the principle of MAGNETIC LOCKING
between two fields.
1)Armature field:Produced when a 3 phase balanced supply is
given to 3 phase balanced armature winding at stator.
Armature field rotates at synchronous speed.The direction
of rotation is given by the phase sequence of 3 phase
supply.
2)DC field:Rotor is brought up to synchronous speed by
external means in the same direction as that of rotation of
armature field. At the instant of MAGNETIC LOCKING(when the
speed of armature field and the speed of rotor are equal)
DC supply is given to DC field winding at rotor.
Motor runs at fixed speed which is called SYNCHRONOUS SPEED
as long the locking is there.
Author:arbelectbit@yahoo.com
| Is This Answer Correct ? | 12 Yes | 5 No |
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