Can you compensate smaller rotor with larger stator (magnet), so rpm could stay the same?
And why you cannot have small hub motor with high voltage (kilovolts) and very high rpm?
And why you cannot have small hub motor with high voltage (kilovolts) and very high rpm?
It will still make high power at high RPMs, but you have to gear it down to convert that power into more torque at low speeds. A gearbox makes it not really a Hub Motor at all any more. Terminology aside, a gearbox also adds even more weight and complexity inside the wheel. For less weight and complexity you can use a half-shaft to the center of the vehicle and use whatever motor you want inboard.