The ac motor doesn't have a brush so how does the rotor rotate?
Ac motor rotor CaoGuan cast aluminum strip and at both ends to form closed circuit of the aluminum ring, when the stator magnetic field across the rotor conductor, a conductor is cutting the induced electromotive force resulting from the magnetic field lines and current. The electromagnetic torque of the rotor axis is formed by electromagnetic force, and the rotor is rotated by rotating field.
If you remove the core, you will see something like a coil, usually made of easily conductive metals such as copper or aluminum. Because ac power is a three-phase alternating current of the sine wave, a rotating field is formed on the coils, so there is less of a dc motor.
The rotor generates a magnetic field based on the induction of the magnetic field. There are also some of the three-phase ac motor is a brush and winding, but the winding is on the rheostat, used to control the strength of the induced current, to control the speed of the rotor.
