A unidirectionally-energized brushless DC motor includes a disk attached to a frame, a plurality of plate-like permanent magnets disposed on the disk at equal intervals around the disk, magnetic cores fixed to the frame according to the plurality of permanent magnets, windings each of which is wound around the magnetic core and to which DC power is supplied, a predetermined number of magnetic cores fixed to the frame, and windings each of which is wound around the magnetic core and connected to a power consumption device. The permanent magnets are located such that an angle formed by a straight line passing through the center of the disk and the center of the permanent magnet and a normal line in the center of a magnetic pole plane of the permanent magnet ranges from 0° to 60°.