Sensor vs non-sensored BL motors

[offroader]

Do companies still make sensored motors? Which ones?

[johnrobholmes]

Hall effect sensors were developed in the 1950's, and are most useful for slow speed commutation (less than 1/10kv). I think it is safe to assume that few people stay in that throttle range for more than a split second in this forum. Of course the best combination would be a sensored system that switched to sensorless at a certain rpm for best efficiency, but that would only add weight and complication IMO. Stepper motors work without sensors, and they are very precise. We probably wont see stepper commutation cross over into our hobby though, the motor and ESC would have to be matched so that the winds weren't smoked. If I remember correctly stepper motors are also high resistance too.