Why is the rotor of an AC motor neither magnetic nor can it rotate?
The rotor core has a number of grooves, groove cast aluminum, cast and short circuit ring in both ends of the rotor, stator windings of electric flux generated cutting aluminum rotor coil bar form the short-circuit current, the rotor and the stator rotating magnetic field and magnetic field interaction, is driven to rotate.
The DC motor and AC synchronous motor works as follows: the stator or rotor produces a rotating magnetic field, while the secondary winding forms polarity. Since the two poles of the stator and rotor are attracted or repelled by each other, the rotation is generated.
The question is not entirely good.What you call an alternating current motor is an alternating current asynchronous motor, also known as an induction motor. Its working principle is: the stator current, will form a rotating magnetic field; the magnetic field and the rotor bar cutting the magnetic field; because the rotor is a closed loop, thus forming the current; so there is a movement with conductor in a magnetic field. This is the action of electromagnetic induction.
