Answer / meenakshi

3 phase induction motor:

v giv 3phase supply to 3 phase stator winding, rotating
magnetic field running at synchronus speed is
produced.initially rotor is at standstill position (@ zero
rpm).this rotating magnetic field vil sweep over rotor.
thus there is cutting of flux lines. an emf is induced.
bcoz of this emf,a current is induced.now A CURRENT
CARRYING CONDUCTOR PLACED IN A MAGNETIC FIELD PRODUCES A
TORQUE.thus motor runs.

Answer / deepak mishra

i am adding just one thing additional to above statement-
torque will produce and as per lenz law the rotor rotates
in the same direction as the rotating field.

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