To prevent the generation of a whirl of an armature with respect to a yoke at the drive of a motor, in the DC motor in which permanent magnets are adhesively fixed to an inner periphery of the yoke, the armature having the same axis as that of the yoke is rotatably supported to the yoke, a magnetic field is generated due to the energization of the armature, and thereby the armature is rotated.
Six permanent magnets 7 arranged on the inner periphery of the yoke 5 are constituted so that all permanent magnets form magnet pairs in such a manner that two permanent magnets adjacent to each other in the circumferential direction of the inner periphery of the yoke form the magnet pairs I, II and III respectively, and at least one of the permanent magnets in each magnet pair is installed at a position which approximates or separates from the other permanent magnet father than in the case that all the permanent magnets are installed on the inner periphery of the yoke at equal intervals in the circumferential direction.
YASUNAKA TOMOHIKO
HAMAGUCHI MASAHITO
