Shown is a cross-section of a permanent-magnet dc (PMDC) motor. (Image from Reference 1) One prime application for an HPDM is a drone. Brushless dc (BLDC) permanent-magnet motors, for example ...

[Frank Herrmann] had an interesting idea to turn a geared DC motor into a servo motor assembly, but with a stepper motor-like interface. By stacking some small PCBs behind the motor body ...

Driving a brushless DC (gimbal) motor can be a pain in the transistors. [Ignas] has written up a nice article not only explaining how to do just this with an Arduino, but also explaining a little ...