Induction Motor

Three phase induction motors have a very simple construction composed of a stator protected with electromagnets, and a rotor composed of conductors shorted at each end, arranged as a “squirrel cage”. They focus on the basic principle of induction in which a rotating electro-magnetic field it made through the use of a three-phase Induction Motor china current at the stators electromagnets. Therefore induces a current within the rotor’s conductors, which in turns creates rotor’s magnetic field that tries to check out stator’s magnetic field, pulling the rotor into rotation.

Benefits of AC Induction Motors are:

Induction motors are basic and rugged in construction. They are better quality and can operate in virtually any environmental condition

Induction motors are cheaper in expense because of simple rotor construction, absence of brushes, commutators, and slip rings

They are maintenance free motors unlike dc motors due to the absence of brushes, commutators and slip rings

Induction motors can be operated in polluted and explosive environments as they do not have brushes that may cause sparks

AC Induction motors are Asynchronous Machines and therefore the rotor does not change at the precise same speed as the stator’s rotating magnetic field. Some difference in the rotor and stator swiftness is necessary in order to develop the induction in to the rotor. The difference between the two is called the slip. Slip should be kept within an optimal range in order for the motor to use 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 control causes a simultaneous, fixed-ratio Frequency and Voltage alter.

Controlled Slip: a Shut Loop speed where voltage and frequency are controlled in order to keep slip within a narrow range while running at a desired speed.

Field Oriented Control (Vector Drive): a Closed Loop Swiftness and Torque control that works 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 on how AC Induction Motors are constructed and function.