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AC Brushless Motors. AC brushless motors use the induction of a rotating magnetic field in the Brushless Ac Motor stator to carefully turn the rotor and stator at the same rate. Like DC motors, these are permanent-magnet synchronous motors, or PMSMs, that trust magnets built into the rotor.

In a brushed DC engine, the rotor spins 180-degrees when an electric current is run to the armature. … In brushless DC motors, the long lasting magnets are on the rotor, and the electromagnets are on the stator. A computer then costs the electromagnets in the stator to rotate the rotor a complete 360-degrees.