Abstract: The present invention relates to an apparatus for generating power by a direct current supply brush that rotates with a field pole generator, the apparatus comprising: a field pole generator which has a plurality of iron cores having a coil or wire wound around; a winding wire used for power generation, the winding wire being formed in such a manner as to wind around the field pole generator; a commutator which is disposed at one end of the field pole generator and has a plurality of commutator segments arranged in a circular shape; a rotating body which has a direct current supply brush adhered to the outer surface of the commutator; a motor for rotating the rotating body; a slip ring secured to a shaft of the motor; and a direct current supply unit for supplying direct current power to the slip ring.