DC brushless motor

摘要

A DC brushless motor for use in various kinds of electric appliances comprises a rotor portion, and this rotor portion includes a rotating shaft and a cylindrical permanent magnet which is rotated with the shaft. A stator portion is provided opposite to the rotor portion, and includes an armature which is located at the inner side of the cylindrical permanent magnet so as to be opposite to and coaxial with the magnet. The armature is provided with a plurality of coils on its peripheries, and has an annular shape as a whole. A circuit board is disposed to be substantially perpendicular to the axis line of the rotating shaft, and the armature is supported above the circuit board. The rotating shaft terminates substantially at the middle of the height of the motor, thus leaving a space between the rotating shaft and the circuit board. An integrated circuit device for driving the motor or drive control of it is provided in the space which faces a central part of the armature, and displaced from the coils on the peripheries of the armature in the radially inward direction of the rotating shaft.