The AC Induction Ac Induction Motora china Engine (ACIM), 
sometimes called a squirrel cage motor, is one of the most popular motors used in consumer and industrial applications. Induction machines are by significantly the biggest group of all industrial electrical machines, converting approximately 70-80% of all electrical energy into mechanical type. The employ a robust rotor construction, making them suitable for high-speed applications. With appropriate design, they have good overloading and field weakening characteristics.
The ACIM is made up of a straightforward 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