The AC Induction Engine (ACIM), sometimes called a squirrel cage motor, is among the most popular motors used in consumer and commercial applications. Induction devices are by far the largest group of all industrial electrical machines, converting Ac Induction Motora china around 70-80% of all electricity into mechanical type. The employ a robust rotor construction, making them suitable for high-speed applications. With correct design, they have great overloading and field weakening features.
The 
ACIM is comprised of a simple cage-like rotor and a stator containing three windings
The changing field made 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