Abstract
Abstract A brushless motor, as its name suggests, is a motor without brushes, slip rings or mechanical commutator, such as are required in conventional DC motors or synchronous AC machines for connection to the rotor windings, [1,2]. Several motors satisfy this basic definition. The commonest is the AC induction motor, in which current in the rotor windings is produced by electromagnetic induction. As an AC motor, the induction motor employs a rotating magnetic field that rotates at a synchronous speed set by the supply frequency. However, the rotor rotates at a slightly slower speed because the process of electromagnetic induction requires relative motion, or slip, between the rotor conductors and the rotating field.
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