US 12,341,378 B2
Axial flux motor with stator cores having enlarged face plates
Mikhail Goykhman, Reseda, CA (US); Galen Chui, Ladera Ranch, CA (US); Piranavan Suntharalingam, Menomonee Falls, WI (US); Robert Anson Lau, Hamilton (CA); Ehab Mohammed Mahmoud Sayed, Hamilton (CA); and Alan Dorneles Callegaro, Hamilton (CA)
Assigned to EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Appl. No. 17/775,228
Filed by EATON INTELLIGENT POWER LIMITED, Dublin (IE)
PCT Filed Nov. 6, 2020, PCT No. PCT/EP2020/025500
§ 371(c)(1), (2) Date May 6, 2022,
PCT Pub. No. WO2021/089190, PCT Pub. Date May 14, 2021.
Claims priority of provisional application 62/931,702, filed on Nov. 6, 2019.
Claims priority of provisional application 62/931,707, filed on Nov. 6, 2019.
Claims priority of provisional application 62/931,712, filed on Nov. 6, 2019.
Prior Publication US 2022/0399791 A1, Dec. 15, 2022
Int. Cl. H02K 1/27 (2022.01); H02K 1/14 (2006.01); H02K 1/16 (2006.01); H02K 5/04 (2006.01); H02K 5/20 (2006.01); H02K 7/00 (2006.01); H02K 9/16 (2006.01); H02K 9/193 (2006.01); H02K 16/02 (2006.01); H02K 21/24 (2006.01)
CPC H02K 1/27 (2013.01) [H02K 1/141 (2013.01); H02K 1/16 (2013.01); H02K 5/04 (2013.01); H02K 5/203 (2021.01); H02K 7/003 (2013.01); H02K 9/16 (2013.01); H02K 9/193 (2013.01); H02K 16/02 (2013.01); H02K 21/24 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An axial flux electric motor comprising:
a) a housing assembly arranged along an axis;
b) a stator assembly mounted within the housing assembly, the stator assembly including a plurality of stator cores with wire coils, the stator assembly defining first and second axial ends, wherein each of the plurality of stator cores has an I-shaped cross-sectional shape in an axial direction parallel to the axis; and
c) a rotor assembly mounted within the housing assembly, the rotor assembly being rotatable about the axis with respect to the stator assembly and including an output shaft extending out of the housing assembly along the axis, the rotor assembly including a first rotor part carrying a first plurality of permanent magnets facing and spaced from the stator assembly first axial end, wherein the housing assembly includes a housing wall having an inner diameter transversely oriented with respect to the axis, wherein the housing wall includes cooling fins that project radially inwardly toward the axis, the cooling fins projecting between the stator cores and having radial lengths that are less than 10 percent as long as the inner diameter, and wherein the cooling fins are hollow and each cooling fin has an internal passageway in communication with a fluid passageway inside the housing wall.