An induction engine or asynchronous motor can be an AC electric motor in which the electric energy in the rotor needed to generate torque is obtained by electromagnetic induction from the magnetic field of the stator winding. … An induction motor’s rotor could be either wound type or squirrel-cage type.
Great things about AC Induction Motors are:

Induction motors are basic and rugged in construction. They are better quality and can operate in any environmental condition
Induction motors are cheaper in cost because of simple rotor construction, lack of brushes, commutators, and slip rings
They are free of maintenance motors unlike dc motors because of the absence of brushes, commutators and slip rings
Induction motors can be operated in polluted and explosive conditions as they don’t have brushes that may cause sparks
AC Induction motors are Asynchronous Machines and therefore the rotor does not switch at the specific same speed because the stator’s rotating magnetic field. Some difference in the rotor and stator quickness is necessary to be able to make the induction into the rotor. The difference between your two is named the slip. Slip should be kept within an optimal range in order for the motor to operate effectively. Roboteq AC Induction controllers can be configured to operate in one of three modes:

Scallar (or Volts per Hertz): an Open loop mode in which a order causes a simultaneous, fixed-ratio Frequency and ac motor Voltage alter.
Controlled Slip: a Closed Loop speed where voltage and frequency are controlled to keep slip inside a narrow range while working at a desired speed.
Field Oriented Control (Vector Drive): a Closed Loop Acceleration and Torque control that functions by optimizing the rotating field of the stator vs. this of the induced field in the rotor.
Observe this video from Learning Engineering for a visual illustration about how AC Induction Motors are constructed and function.