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up loop mode where a control causes a simultaneous, fixed-ratio Frequency and Voltage change.<\/p>\nThree phase induction motors have a very simple construction composed of a stator covered with electromagnets, and a rotor made up of conductors shorted at each end, arranged as a “squirrel cage”. They focus on the theory of induction in which a rotating electro-magnetic field it produced by applying a three-stage current at the stators electromagnets. Therefore induces a current within the rotor’s conductors, which in turns creates rotor\u2019s magnetic field that attempts to check out stator\u2019s magnetic field, pulling the rotor into rotation.<\/p>\n
Great things about AC Induction Motors are:<\/p>\n
Induction motors are basic and rugged in building. They are better quality and can operate in any environmental condition<\/p>\n
Induction motors are cheaper in cost because of simple rotor construction, absence of brushes, commutators, and slip rings<\/p>\n
They are free of maintenance motors unlike dc motors due to the lack of brushes, commutators and slip rings<\/p>\n
Induction motors can be operated in polluted and explosive environments as they don’t have brushes that may cause sparks<\/p>\n
AC Induction motors are Asynchronous Devices meaning that the rotor will not convert at the exact same speed because the stator’s rotating magnetic field. Some difference in the rotor and stator speed is necessary in order to create the induction into the rotor. The difference between the two is named the slip. Slip must be kept within an optimal range in order for the motor to use efficiently. Roboteq AC Induction controllers could be configured to operate in one of three modes:<\/p>\n
Scallar (or Volts per Hertz): an Open up loop mode where a control causes a simultaneous, fixed-ratio Frequency and Voltage change.<\/p>\n
Controlled Slip: a Closed Loop speed where voltage and frequency are managed to keep slip inside a narrow range while working at a preferred speed.<\/p>\n
Field Oriented Control (Vector Drive): a Closed Loop Swiftness and Torque control that functions by optimizing the rotating field of the stator vs. this of the induced field in the rotor. <\/p>\n