The AC Induction Engine (ACIM), sometimes called a squirrel cage motor, is one of the most popular motors used in consumer and commercial applications. Induction devices are by significantly 
the largest group of all Ac Induction Motora china industrial electrical machines, converting approximately 70-80% of all electrical energy into mechanical form. 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 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