公开(公告)号：US20250125676A1

公开(公告)日：2025-04-17

申请号：US18486614

申请日：2023-10-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Shawn H. Swales ,  Rebecca K. Risko Cattell ,  Neal Parsons ,  Edward L. Kaiser ,  Matthew James Bozich ,  Nicholas Mark Sulimirski

IPC: H02K1/32 ,  H02K1/276

Abstract: A rotor for an electric machine includes an air circulation cooling system. The rotor includes a rotor core having cavities internal to the rotor core. The rotor core extends longitudinally between two ends. The cavities are defined by the rotor core. The cavities extend through the rotor core and open through at least one of the ends. The rotor core operates to circulate air through the cavities by rotation of the rotor core.

公开(公告)号：US11955852B2

公开(公告)日：2024-04-09

申请号：US17367853

申请日：2021-07-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： SeungHwan Keum ,  Mei Yang ,  Neal Parsons ,  Ruth Herrera Reed

IPC: H02K15/12 ,  H02K3/12 ,  H02K3/44 ,  H02K9/19 ,  H02K15/02

CPC classification number: H02K15/12 ,  H02K3/12 ,  H02K3/44 ,  H02K9/19 ,  H02K15/026 ,  H02K2209/00

Abstract: Presented are oleophilic surface treatments for electric machines, methods for making/using such electric machines, and vehicles employing traction motors having stator windings with oleophilic treatments on select surfaces. An electric machine includes an outer housing with a direct-cooling thermal management system fluidly connected to the housing to circulate thereto a coolant fluid. A stator assembly, which is attached to the housing, includes a stator core with one or more electromagnetic windings mounted to the stator core. A rotor assembly is movably mounted to the hosing adjacent the stator assembly. The rotor assembly includes a rotor core with one or more magnets mounted to the rotor core spaced, e.g., across an air gap, from the winding(s). Select components of the stator assembly have a target surface with an oleophilic surface treatment that enlarges the target surface's wetted area and increases a coolant mass of the coolant fluid contacting the target surface.

公开(公告)号：US11817765B2

公开(公告)日：2023-11-14

申请号：US17401452

申请日：2021-08-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： SeungHwan Keum ,  Mei Yang ,  Neal Parsons ,  Ruth Herrera Reed

IPC: H02K9/19 ,  H02K5/04 ,  H02K15/02 ,  H02K1/26 ,  H02K1/16

CPC classification number: H02K9/19 ,  H02K1/16 ,  H02K1/26 ,  H02K5/04 ,  H02K15/024

Abstract: Presented are oleophobic surface treatments for electric machines, methods for making/using such electric machines, and vehicles employing traction motors having oleophobic treatments on select “non-target” surfaces. An electric machine includes a direct-cooling thermal management system that circulates a coolant fluid to the electric machine's outer housing. A stator assembly, which is attached to the housing, includes a stator core with one or more electromagnetic windings mounted to the stator core. A rotor assembly is rotatably mounted to the hosing adjacent the stator assembly. The rotor assembly includes a rotor core with one or more magnets mounted to the rotor core and spaced across an air gap from the winding(s). Select components of the outer housing, rotor assembly, and/or stator assembly have a target surface with an oleophobic surface treatment that reduces the non-target surface's wetted area and decreases the mass of coolant fluid contacting the non-target surface.

公开(公告)号：US20230046826A1

公开(公告)日：2023-02-16

申请号：US17401452

申请日：2021-08-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： SeungHwan Keum ,  Mei Yang ,  Neal Parsons ,  Ruth Herrera Reed

IPC: H02K9/19 ,  H02K5/04 ,  H02K1/16 ,  H02K1/26 ,  H02K15/02

Abstract: Presented are oleophobic surface treatments for electric machines, methods for making/using such electric machines, and vehicles employing traction motors having oleophobic treatments on select “non-target” surfaces. An electric machine includes a direct-cooling thermal management system that circulates a coolant fluid to the electric machine's outer housing. A stator assembly, which is attached to the housing, includes a stator core with one or more electromagnetic windings mounted to the stator core. A rotor assembly is rotatably mounted to the hosing adjacent the stator assembly. The rotor assembly includes a rotor core with one or more magnets mounted to the rotor core and spaced across an air gap from the winding(s). Select components of the outer housing, rotor assembly, and/or stator assembly have a target surface with an oleophobic surface treatment that reduces the non-target surface's wetted area and decreases the mass of coolant fluid contacting the non-target surface.

公开(公告)号：US20230011641A1

公开(公告)日：2023-01-12

申请号：US17367853

申请日：2021-07-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： SeungHwan Keum ,  Mei Yang ,  Neal Parsons ,  Ruth Herrera Reed

IPC: H02K15/12 ,  H02K15/02

Abstract: Presented are oleophilic surface treatments for electric machines, methods for making/using such electric machines, and vehicles employing traction motors having stator windings with oleophilic treatments on select surfaces. An electric machine includes an outer housing with a direct-cooling thermal management system fluidly connected to the housing to circulate thereto a coolant fluid. A stator assembly, which is attached to the housing, includes a stator core with one or more electromagnetic windings mounted to the stator core. A rotor assembly is movably mounted to the hosing adjacent the stator assembly. The rotor assembly includes a rotor core with one or more magnets mounted to the rotor core spaced, e.g., across an air gap, from the winding(s). Select components of the stator assembly have a target surface with an oleophilic surface treatment that enlarges the target surface's wetted area and increases a coolant mass of the coolant fluid contacting the target surface.