Brushless AC electric motor

A Brushless AC electric motor, also known as a permanent magnet synchronous motor (PMSM), is similar to a brushless DC electric motor in that the magnetic field of the rotor is supplied by the permanent magnets rather than by electromagnets. However, the stator windings of a brushless AC motor are sinusoidally distributed windings, while those of a brushless DC motor are salient field coils.

References

Electric motors

Broad motor categories	Synchronous motor • AC motor • DC motor

Conventional electric motors	Induction • Brushed DC • Brushless DC • Stepper • Linear • Unipolar • Reluctance

Unusual electric motors	Ball bearing • Homopolar • Piezoelectric • Ultrasonic • Electrostatic • Switched reluctance • Superconducting electric machine • Electrically powered spacecraft propulsion

Motor controllers	Adjustable-speed drive • Motor soft starter • Braking chopper • Cycloconverter • DC injection braking • Amplidyne • Direct torque control • Direct on line starter • Electronic speed control • Metadyne • Motor controller • Variable-frequency drive • Vector control • Ward Leonard control • Thyristor drive

See also	Barlow's wheel • Nanomotor • Traction motor • Lynch motor • Mendocino motor • Repulsion motor • Inchworm motor • Booster (electric power) • Brush (electric) • Electrical generator • Alternator