US 12,438,425 B2
Electric engine for a charging device and production method
Kai Homann, Mainz (DE); and Thomas Glaß, Rockenhausen (DE)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on Aug. 5, 2022, as Appl. No. 17/817,667.
Claims priority of application No. 102021120803.3 (DE), filed on Aug. 10, 2021.
Prior Publication US 2023/0050563 A1, Feb. 16, 2023
Int. Cl. H02K 16/04 (2006.01); H02K 1/16 (2006.01); H02K 1/20 (2006.01); H02K 3/28 (2006.01); H02K 7/08 (2006.01); H02K 15/12 (2006.01)
CPC H02K 16/04 (2013.01) [H02K 1/165 (2013.01); H02K 1/20 (2013.01); H02K 3/28 (2013.01); H02K 7/08 (2013.01); H02K 15/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A stator arrangement for an electric engine having an inner rotor comprising:
an outer stator core with electrical windings, and
a separate inner stator core, which is arranged inside the outer stator core and is designed to receive the rotor,
wherein the outer stator core defines a first inner diameter, which is dimensioned in such a way that a bearing unit of the electric engine can be guided through the outer stator core, and
an outer diameter of the inner stator core substantially corresponds to the first inner diameter, wherein the inner stator core is designed to extend a magnetic flux in the radial direction during operation,
wherein the inner stator core comprises a plurality of stator tooth extensions, which are arranged distributed in the peripheral direction and extend from the outer diameter to a second inner diameter.