Patent ID: 7893590
Filing Date: 2011-02-22
Classification: H02K

Abstract:
1. A stator for a rotary electric machine, the stator comprising: a stator core assembly provided with a plurality of core segments; and a stator coil assembled in the stator core assembly, each of the plurality of core segments comprising: a yoke having an inner circumferential surface, a first radial side, and a second radial side opposite thereto; two teeth extending, in corresponding radial directions of the stator core assembly, from the inner circumferential surface and circumferentially aligned at a space therebetween, the two teeth and a part of the inner circumferential surface between the two teeth defining a slot, the part of the inner circumferential surface being defined as a bottom of the slot; a circumferential projection formed on at least part of one of the first and second radial sides; and a recess formed in the other of the first and second radial sides, the projection having a shape to be fitted in the recess, the plurality of core segments being circumferentially arranged such that the circumferential projection of each of the plurality of core segments is fitted in the recess of an alternative one of the plurality of core segments to thereby provide the stator core assembly, the recess of the alternative one of the plurality of core segments being circumferentially adjacent to the projection of each of the plurality of core segments, wherein, when a number of the plurality of core segments circumferentially arranged is represented as n, a length of a maximum projecting portion of the circumferential projection of each of the plurality of core segments from the one of the first and second radial sides thereof is represented as p, a radial length of the maximum projecting portion of the projection of each of the plurality of core segments from a circumferentially extended line from the bottom of the slot is represented as q, and a length of the slot with respect to the bottom thereof in a radial direction of the stator core assembly is represented as t, the number n, the length p, the length q, and the length t meet the following equation: