The AC Induction Engine (ACIM), sometimes called a squirrel cage motor, is one of the most popular motors found in consumer and commercial applications. Induction devices are by considerably the Ac Induction Motora china largest group of all commercial electrical machines, converting around 70-80% of all electricity into mechanical form. The employ a robust rotor construction, making them ideal 
for high-speed applications. With correct design, they have good overloading and field weakening features.
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
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