How a Brushless Motor Works (Spinning With No Brushes at All)

No brushes, no commutator, and yet it spins. A brushless motor moves the switching from the rotor to the electronics: three coils, a magnet rotor, and a controller that energises the coils in sequence.

The video shows the six-step commutation, how the controller knows where the rotor is, and why inrunners and outrunners look different.

In this video

• Three-phase stator and permanent-magnet rotor
• Six-step commutation
• Sensored and sensorless rotor position
• Inrunner versus outrunner