Patent ID: 7808145

Claim:
A rotary electric device comprising: an armature with a plurality of commutator segments; a plurality of coils that are formed such that winding wires to be conductive with adjacent commutator segments are wound a predetermined winding number between arbitrary slots of the armature, with the plurality of coils formed circumferentially on the armature; and a yoke that pivotally supports the armature, with the yoke including at least two sets of magnetic poles, wherein: a number of slots is set to be half a number of commutator segments, a first winding wire of the winding wires to be conductive with an arbitrary commutator segment and a first commutator segment that is adjacent to the arbitrary commutator segment in one direction circumferentially is wound around slots that are opposed to one magnetic pole so as to be in a forward-winding direction, a second winding wire of the winding wires to be conductive with the arbitrary commutator segment and a second commutator segment that is adjacent to the arbitrary commutator segment in another direction circumferentially is wound around slots that are opposed to another magnetic pole so as to be in a reverse-winding direction, at least one of the first winding wire and the second winding wire is wound around slots that are opposed to all magnetic poles serving as a same magnetic pole in a predetermined winding direction so as to correspond to the predetermined winding number as a total winding number between respective slots, so that the plurality of coils are formed, and a slot from which the first winding wire is led out and a slot into which the second winding wire is led are located circumferentially at both sides of the commutator segments with which the first winding wire and the second winding wire are conductive.