Brushless DC
Motor Build
A brushless DC motor designed and assembled from raw components — stator coils wound by hand, rotor magnet spacing set for commutation timing, and measured speed checked against calculated RPM.
Overview
A brushless motor is a simple idea and an unforgiving build: it only keeps turning if the field the coils produce and the magnets on the rotor stay in step. I designed and assembled one from raw components rather than a kit, working from electromagnetic induction and Lorentz-force analysis — winding the stator coils by hand, setting the rotor magnet spacing that governs commutation timing, and then measuring the speed the finished motor actually turned against the RPM I had calculated it should.
What I built
Built from first principles
Designed and assembled a functional brushless DC motor from raw components, applying electromagnetic induction and Lorentz-force analysis to get from theory to a working prototype.
Hand-wound stator & commutation timing
Wound the stator coils and set the rotor magnet spacing to control commutation timing — the adjustment that took the motor from stalling to continuous, self-sustaining rotation.
Measured against predicted RPM
Measured the output rotational speed on the bench and compared it against the theoretically calculated RPM target, confirming the build matched predicted performance.