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.

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.