US 12,355,328 B2
Electrical machine cooling with axial and radial inlets and outlets
Bulent Sarlioglu, Madison, WI (US); Gregory F. Nellis, Waunakee, WI (US); Leyue Zhang, Madison, WI (US); and Hao Ding, Carson, CA (US)
Assigned to Wisconsin Alumni Research Foundation, Madison, WI (US)
Filed by Wisconsin Alumni Research Foundation, Madison, WI (US)
Filed on Oct. 4, 2022, as Appl. No. 17/937,798.
Claims priority of provisional application 63/253,634, filed on Oct. 8, 2021.
Prior Publication US 2023/0112852 A1, Apr. 13, 2023
Int. Cl. H02K 5/20 (2006.01); H02K 1/20 (2006.01); H02K 1/32 (2006.01)
CPC H02K 5/20 (2013.01) [H02K 1/20 (2013.01); H02K 1/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrical machine comprising:
a rotor comprising
a rotor core configured to mount to a shaft for rotation of the rotor core and shaft together; and
a plurality of blades extending radially away from the rotor core;
a stator comprising
a stator core; and
a plurality of teeth extending from the stator core toward the rotor core, wherein the plurality of teeth defines a plurality of slots between successive teeth of the plurality of teeth;
a winding wound through the plurality of slots, wherein the stator is mounted radially relative to the rotor; and
a housing comprising
a front wall;
a back wall;
a radial sidewall mounted between the front wall and the back wall to define an enclosure;
a plurality of radial inlet aperture walls formed circumferentially around the radial sidewall; and
a plurality of radial outlet aperture walls formed circumferentially around the radial sidewall,
wherein an area of each of the plurality of radial outlet aperture walls is greater than an area of each of the plurality of radial inlet aperture walls,
wherein a number of the plurality of radial inlet aperture walls is same as a number of the plurality of radial outlet aperture walls.