Patent ID: 8164230

Claim:
A stator comprising: a core holder; and a stator core configured by split cores arranged so as to form the annular shape, and press-fitted into the core holder; wherein each of the split cores is configured so that a plurality of metal plates is layered and fixed to each other by dowel-fastening, and wherein each of the split cores includes an outer circumference groove portion and a dowel-fastening portion, the outer circumference groove portion being formed at a portion of an outer circumferential surface of the split core radially outer than the dowel-fastening portion so as to be recessed in a radially inward direction of the stator core to include a predetermined depth; each of the split cores includes a teeth portion protruding from an inner circumferential surface of a yoke portion in the radially inward direction of the stator core, the dowel-fastening portion is formed in the vicinity of an outer circumferential surface of the yoke portion, and the outer circumference groove portion is formed at the outer circumferential surface of the yoke portion to overlap with the dowel-fastening portion.