US 7,468,570 B2
Stator assembly for an electric machine and method of manufacturing the same
Dan M. Ionel, Fox Point, Wis. (US); Stephen J. Dellinger, Houston, Ohio (US); Robert J. Heideman, Kewaskum, Wis. (US); and Alan E. Lesak, Franklin, Wis. (US)
Assigned to A. O. Smith Corporation, Milwaukee, Wis. (US)
Filed on Feb. 08, 2008, as Appl. No. 12/28,462.
Application 12/028462 is a continuation of application No. 11/263340, filed on Oct. 31, 2005, granted, now 7,348,706.
Prior Publication US 2008/0129140 A1, Jun. 05, 2008
Int. Cl. H02K 1/00 (2006.01)
U.S. Cl. 310—216  [310/254; 310/259] 18 Claims
OG exemplary drawing
 
1. A stator for a multi-phase electric machine, the stator comprising:
a plurality of core segments interconnected with one another, at least one core segment including a plurality of teeth and a back portion that at least partially interconnects the teeth, the back portion of each core segment having a first arrangement in which the teeth of that core segment are a first distance from one another and a second arrangement in which the teeth of that core segment are a second distance from one another, the second distance being smaller than the first distance; and
a plurality of coils, each coil surrounding at least a portion of one tooth, wherein all coils surrounding teeth of a single core segment are interconnected to at least partially define one phase winding, wherein each of the plurality of core segments includes a center tooth having a first profile, a first end tooth having a second tooth profile, and a second end tooth having a third tooth profile, the first tooth profile being different than the second tooth profile and the third tooth profile.