BDRM motors are known also as new generation motors, rotor of external rotor motor spins externally unlike conventional motors. Depending on this, motor occupies less volume, so it saves more space in the application. Dissipated heat is removed drastically in the airflow for external rotor motors comparing asynchronous motors whose enclosed spinning rotor causes heat which can not be removed this much in stator. In addition this, integrated impeller to external rotor motor act as heat sink by getting air stream over itself at the same time spinning for its actual mission.