Patent ID: 6703751
Filing Date: 2004-03-09
Classification: H02K

Abstract:
A dynamo-electric machine comprising:a yoke; magnetic poles fixed in said yoke; a shaft rotatably provided in said yoke; an armature having a winding consisting of a plurality of coil portions each formed by lap-winding a conductor between a corresponding pair of slots formed in an outer circumferential surface portion of a core fixed to said shaft in such a way as to extend in an axial direction thereof; a commutator fixed to an end portion of said shaft and having a plurality of segments to which both end sections of said coil portions are electrically connected; brushes made to respectively abut against the surfaces of said segments of said commutator; and equalizers for connecting said segments, which are to be at equal electric potential, to each other, wherein n of said coil portions are parallel connected between said segments where n is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2, wherein said coil portions are disposed in magnetically symmetrical different slots, and wherein each of said coil portions comprises a plurality of small coil portions parallel-connected to one another.