Benefits of| AC Induction Motors

An induction engine or asynchronous motor can be an AC electric motor in which the electric current in the rotor needed to create torque is obtained by electromagnetic induction from the magnetic field of the stator winding. ... An induction motor's rotor can be either wound type or squirrel-cage type.
Benefits of AC Induction Motors are:

Induction motors are basic and rugged in building. They are more robust and can operate in any environmental condition
Induction motors are cheaper in expense because of simple rotor construction, absence of brushes, commutators, and slip rings
They are free of maintenance motors unlike dc motors due to the lack of brushes, commutators and slip rings
Induction motors can be operated in polluted and explosive environments as they don't have brushes that may cause sparks
AC Induction motors are Asynchronous Devices meaning that the rotor does not turn at the specific same speed as the stator's rotating magnetic field. Some difference in the rotor and stator rate is necessary to be able to produce the induction into the rotor. The difference between your two is named the slip. Slip should be kept in a optimal range to ensure that the motor to use efficiently. Roboteq AC Induction controllers can be configured to operate in one of three modes:

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

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