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How the starter control the starting current in three
phase AC Motor?(In DC apply the reistance).
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Answer Posted / lovkesh arora
Whenever you start a big heavy electric motor, you need to
start it slowly to prevent the rotor overheating and
drawing an enormous current. When the windings of a 3-phase
motor are connected in STAR the current is reduced to only
root three of the normal running current that is taken when
it is connected in DELTA.
Once the motor picks up speed, the connection is changed to
DELTA so that the motor runs at full speed and torque from
then on. It's a bit like using the gears of an automobile.
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