The AC Induction Electric motor (ACIM), sometimes called a squirrel cage motor, is one of the most popular Ac Induction Motora china motors found in consumer and commercial applications. Induction devices are by much the biggest group of all commercial electrical machines, converting approximately 70-80% of all electricity into mechanical type. The have a very robust rotor construction, which makes them suitable for high-speed applications. With appropriate design, they have good overloading and field weakening characteristics.
The ACIM is comprised of a straightforward cage-like rotor and a stator containing three windings
The changing field produced by the AC line current in the 
stator induces a current in the rotor which interacts with the field and causes the rotor to rotate
The rotor does not have any moving contacts, which eliminates sparking