Brushless commutator-free small motor capable of automatically adjusting current

The invention provides a brushless commutator-free small motor capable of automatically adjusting current. The brushless commutator-free small motor comprises a rotor, a rotor bracket, a battery box,a magnet and a switch, wherein the rotor is formed by winding an enameled wire into a multi-turn circular ring shape, the two ends of the enameled wire are completely stripped to serve as a rotor rotating shaft, an insulating sheath is removed from one end of an insulating sheath conducting wire, the obtained insulating sheath conducting wire is wound into a solenoid as a rotating shaft supportingtube, the insulating sheath conducting wire is vertically fixed on the battery box as the rotor bracket, the other end of the insulating sheath conducting wire is connected to two ends of the batterythrough the switch, the magnet is fixed on the battery box, the rotating shaft extension line of the rotor does not coincide with the center of gravity of the rotor, the rotor rotating shafts at twoends of the rotor are on the