Patent ID: 7986072
Filing Date: 2011-07-26
Classification: H02K,Y10T

Abstract:
1. A stator core of an electric rotating machine, comprising: a plurality of ring-shaped steel sheets obtained from a single steel plate wound in a cylindrical shape, each steel sheet comprising: a plurality of teeth disposed along a circumferential direction of the core on an inner side of the steel sheet in a radial direction of the core; a plurality of divided end portions disposed along the circumferential direction on an outer side of the steel sheet in the radial direction, a thickness of the divided end portions in an axial direction of the core being substantially equal to a thickness of the teeth and being substantially constant in the radial direction; a plurality of slits alternately disposed with the divided end portions along the circumferential direction on the outer side; and a single boundary portion disposed between the group of teeth and the group of divided end portions, the boundary portion having a changing thickness in the axial direction so as to be decreased toward the outer side in the radial direction.