The main parts in an AC induction motor is the rotor and the stator.In an AC motor, there's a ring of electromagnets arranged around the outside which are designed to produce a rotating magnetic field. Inside the stator, there's a solid metal axle, a loop of wire, a coil, a squirrel cage made of metal bars and interconnections , or some other freely rotating metal part that can conduct electricity. Unlike in a DC motor, where you send power to the inner rotor, in an AC motor you send power to the outer coils that make up the stator. The coils are energized in pairs, in sequence, producing a magnetic field that rotates around the outside of the motor.
Two pairs of electromagnet coils, shown here in red and blue, are energized in turn by an AC supply). The two red coils are wired in series and energized together and the two blue coils are wired the same way. Since it's AC, the current in each coil doesn't switch on and off abruptly but rises and falls smoothly in the shape of a sine wave: when the red coils are at their most active, the blue coils are completely inactive, and vice-versa. In other words, their currents are out of stepAs the coils are energized, the magnetic field they produce between them induces an electric current in the rotor. This current produces its own magnetic field that tries to oppose the thing that caused it. The interaction between the two fields causes the rotor to turn.As the magnetic field alternates between the red and blue coils, it effectively rotates around the motor. The rotating magnetic field makes the rotor spin in the same direction and at almost the same speed.HOPE IT HELPS U