Patent ID: 8419386

Claim:
A DC fan comprising: a housing including a frame and a positioning member, with the frame defining a compartment, with the positioning member mounted in the compartment and dividing the compartment into a first chamber and a second chamber; a DC motor mounted in the first chamber of the compartment of the frame, with the DC motor including a rotor and a cup-shaped stator, with the rotor including a shaft having an outer periphery and a permanent magnet fixed to and around the outer periphery of the shaft, with the permanent magnet having an outer periphery, with the shaft rotatably mounted to the frame and the positioning member, with the cup-shaped stator including a cylindrical winding portion surrounding the rotor and having an axial end edge, with the cup-shaped stator further including a coupling board fixed to the axial end edge of the cylindrical winding portion and abutting with the positioning member of the frame, with the cylindrical winding portion including an inner periphery facing the outer periphery of the permanent magnet of the rotor with an air gap formed between the cylindrical winding portion and the rotor; a drive control unit mounted in the second chamber of the compartment and electrically connected to the cylindrical winding portion of the cup-shaped stator, with the positioning member located intermediate the drive control unit and the permanent magnet; and an impeller coupled to an end of the shaft, with the cylindrical winding portion formed by winding at least one conductive wire, with said at least one conductive wire wound to form the inner periphery of the cylindrical winding portion.