US 12,381,439 B2
Direct-drive, axially flux oriented, electric motor assembly having primary heat conduction pathway from stator to bearing housing
Matheus Alexandre Bevilaqua, Auckland (NZ); and Russell Joseph Jackson, Auckland (NZ)
Assigned to Fisher & Paykel Appliances Limited, (NZ)
Appl. No. 17/619,720
Filed by Fisher & Paykel Appliances Limited, Auckland (NZ)
PCT Filed Jun. 17, 2020, PCT No. PCT/IB2020/055627
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/254969, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 754649 (NZ), filed on Jun. 17, 2019.
Prior Publication US 2022/0311303 A1, Sep. 29, 2022
Int. Cl. H02K 9/22 (2006.01); D06F 37/20 (2006.01); D06F 37/30 (2020.01); F16C 19/52 (2006.01); F16C 19/56 (2006.01); F16C 35/067 (2006.01); H02K 5/16 (2006.01); H02K 5/173 (2006.01); H02K 7/08 (2006.01); H02K 21/24 (2006.01)
CPC H02K 5/1737 (2013.01) [D06F 37/206 (2013.01); D06F 37/304 (2013.01); F16C 19/525 (2013.01); F16C 19/56 (2013.01); F16C 35/067 (2013.01); H02K 7/088 (2013.01); H02K 9/223 (2021.01); H02K 21/24 (2013.01); F16C 2380/26 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric motor assembly suitable for driving a laundry machine, being a laundry washing machine or dryer or washer-dryer, the laundry machine comprising a drum for holding a load of laundry, which drum comprises an outer drum or tub, the motor assembly comprising:
an electric motor comprising a single stator comprising stator coils wound upon stator cores carried by a stator frame, and a single rotor comprising permanent magnets and directly-driving an output drive shaft from the motor, wherein the rotor magnets and stator coils are spaced axially so that the magnetic flux path between the rotor magnets and stator coils is oriented axially,
a bearing housing component configured to rotatably support the output drive shaft and adapted to be associated with a base of the outer drum or tub of the laundry machine, wherein the stator associated with the bearing housing component, and to provide a primary heat conduction pathway from the stator coils to the bearing housing component,
said primary heat conduction pathway comprising a substantially axial heat conduction pathway between at least one of the stator coils and the bearing housing component, wherein the substantially axial heat conduction pathway passes through an annular area of surface contact between the stator frame and the bearing housing.