ABB IE3 Asynchronous Motor
Category:
【Number】
ABB-01
Detailed information
A three-phase induction motor that operates as an electric motor. In a three-phase induction motor, the rotor's speed is lower than the speed of the rotating magnetic field. Due to the relative motion between the rotor windings and the magnetic field, an electromotive force and current are induced in the rotor windings, which interact with the magnetic field to produce an electromagnetic torque, thereby achieving energy conversion. Compared with single-phase induction motors, three-phase induction motors offer superior operating performance and can save on various materials. Depending on the rotor structure, three-phase induction motors can be classified into two types: squirrel-cage type and wound-rotor type. Squirrel-cage induction motors have a simple structure, reliable operation, light weight, and low cost, making them widely used. Their main drawback, however, is the difficulty in speed regulation. In a wound-rotor three-phase induction motor, just like the stator, the rotor is equipped with three-phase windings that are connected to an external rheostat via slip rings and brushes. By adjusting the resistance of the rheostat, the motor’s starting performance can be improved and its speed can be precisely regulated.
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