US 12,237,719 B2
Electric machine stator and method for reducing torque ripple of electric machine
Chuan Deng, Nanjing (CN); Yigang Yuan, Nanjing (CN); and Guohua Du, Nanjing (CN)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Mar. 7, 2022, as Appl. No. 17/687,978.
Claims priority of application No. 202110255152.6 (CN), filed on Mar. 9, 2021.
Prior Publication US 2022/0294284 A1, Sep. 15, 2022
Int. Cl. H02K 1/16 (2006.01); H02K 3/12 (2006.01); H02K 3/48 (2006.01); H02K 15/02 (2006.01)
CPC H02K 1/165 (2013.01) [H02K 15/024 (2013.01); H02K 3/12 (2013.01); H02K 3/48 (2013.01); H02K 2213/03 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A stator for an electric machine, comprising:
a plurality of teeth defining a plurality of slots therebetween configured to accommodate windings, wherein, the plurality of slots extend radially between an inner circumference and an outer circumference of the stator, the plurality of slots including regular slots and misplaced slots, wherein, the regular slots include a first slot neck portion and a first filling portion and the misplaced slots include a second slot neck portion and a second filling portion, wherein the first slot neck portion and the second slot neck portion have different dimensions, and wherein the plurality of slots and associated windings establish at least two phases with at least one of the at least two phases including a regular slot and a misplaced slot, wherein the second slot neck portion has a first width in a circumferential direction of the inner circumference of the stator, the second filling portion has a second width in the circumferential direction of the inner circumference of the stator, and the first width is smaller than the second width.