Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors.

DC motors are most commonly used in variable speed and torque applications.

AC motors include single, multiphase, universal, induction, synchronous, and gear motors.

Stepper motors use a magnetic field to move a rotor in small angular steps or fractions of steps.

Motor speed controllers are electronic devices that control motor speed.

Gearmotors consist of an AC or DC motor with an integral gearbox or gear head that steps delivered speed up or down

Motor and generator winding services suppliers specialize in producing custom motors, generators and custom windings per customer specifications, as well as companies that specialize in motor repair and refurbishing.