JPS6489944A - Five-phase dc motor - Google Patents

Abstract

PURPOSE:To obtain the five-phase DC motor of extremely less torque ripple, by winding up every two armature windings phase by phase, and by connecting respective terminals to the 15 commutator segments of different widths in order. CONSTITUTION:A field pole 15 having the four poles of poles N and poles S at equal intervals is set as a stator. A rotor armature confronted with the stator is provided with five salient poles, and on the respective salient poles, armature windings 35 for a first-a fifth phase are respectively wound up. In this case, as the armature windings of the respective phases, two armature windings 35A and 35B are contrived to be respectively wound up. Besides, so far as commutator segments are concerned, the commutator segments of double widths are arranged at every two segments, and as a whole, the 15 commutator segments 39 are arranged, and to the wider commutator segments, the internal terminals of the windings of the respective phases are connected. So far as the commutator segments of smaller widths are concerned, the segments of each phase shifted by 360 degrees are connected to each other. Then, a pair of brushes 12 shifted positionally by 180 degrees at an electrical angle are permitted to slide.