US 11,935,680 B2
Stator for an electric motor
Karl-Heinz Glatz, Obereschach (DE); Peter Würfel, Villingen-Schwenningen (DE); Vladimir Popov, Villingen-Schwenningen (DE); Mark Kempa, Villingen-Schwenningen (DE); and Peter Borsai, Tuttlingen (DE)
Assigned to Minebea Mitsumi Inc., Nagano (JP)
Filed by Minebea Mitsumi Inc., Nagano (JP)
Filed on Oct. 13, 2021, as Appl. No. 17/500,000.
Claims priority of application No. 102020126845.9 (DE), filed on Oct. 13, 2020.
Prior Publication US 2022/0115174 A1, Apr. 14, 2022
Int. Cl. H02K 1/14 (2006.01); H01F 27/245 (2006.01); H01F 27/26 (2006.01); H02K 1/16 (2006.01); H02K 15/02 (2006.01)
CPC H01F 27/245 (2013.01) [H01F 27/263 (2013.01); H02K 1/148 (2013.01); H02K 1/165 (2013.01); H02K 15/024 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A stator for an electric motor, comprising a hollow cylindrical stator yoke and comprising a stator star arranged within the stator yoke and including a plurality of radially outwardly extending stator teeth having tips contacting, in an assembled state, corresponding connection positions on an inner circumference of the stator yoke, wherein the stator yoke and the stator star are each formed by a laminated metal sheet pack, wherein the laminated metal sheet pack of the stator star comprises sheet metal layers of stator sheets, closed in a circumferential direction, comprising stator teeth-connected with each other via pole shoe bridges and sheet metal layers of individual stator teeth spaced with respect to each other in the circumferential direction, wherein each of the pole shoe bridges has at least one material recess extending in a radial direction, and wherein a minimum radial material extension of the pole shoe bridges in a region of at least one material recess corresponds to 0.2 to 0.5 times a radial material extension of the pole shoe bridges outside the region of the at least one material recess.