Novak HV4400 and 7XL BL Sensored System...

[maxxdude1234]

Originally Posted by GriffinRU

Sensoreless based on feedback from phases, which only exists when motor spins, while sensored feedback doesn't require rotation to point out rotors location.

Artur

....And the slower the motor spins, the smaller the 'back emf', so the less easy it is for the controller to detect the rotors position - hence cogging at low speeds.