The AC Induction Engine (ACIM), sometimes called a squirrel cage motor, is one of the most Ac Induction Motora china 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 have a very robust rotor construction, making them ideal 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
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