I-rotor yangaphandle ye-brushless motor luhlobo lokuhamba kwe-axial, imagnethi esisigxina ehambelanayo, i-brushless commutation motor. Ikakhulu iqulunqwe yi-rotor yangaphandle, i-stator yangaphakathi, imagnethi esisigxina, i-electronic commutator kunye nezinye iindawo, kuba ubunzima be-rotor yangaphandle buncinci, umzuzu we-inertia uncinci, isantya siphezulu, isantya sokuphendula sikhawuleza, ngoko ubuninzi bamandla bungaphezulu kwe-25% ephezulu kune-rotor motor yangaphakathi.
Iinjini ze-rotor zangaphandle zisetyenziselwa uluhlu olubanzi lwezicelo, kubandakanywa kodwa kungaphelelanga: izithuthi zombane, iidrone, izixhobo zasekhaya, oomatshini boshishino, kunye ne-aerospace. Ubuninzi bayo bamandla aphezulu kunye nokusebenza okuphezulu kwenza iimotor ze-rotor zangaphandle zibe yinto yokuqala yokuzikhethela kwiindawo ezininzi, ukubonelela ngemveliso yamandla anamandla kunye nokunciphisa ukusetyenziswa kwamandla.