The AC Induction Engine (ACIM), sometimes called a squirrel cage motor, is among the most popular motors found in consumer and commercial applications. Induction machines are by significantly the largest group of all 
industrial electrical machines, converting approximately 70-80% of all electrical energy into mechanical form. The employ a robust rotor construction, which makes them suitable for high-speed applications. With appropriate design, they have great overloading and field weakening characteristics.
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 Ac Induction Motora china eliminates sparking
