Gm Global Technolgoy Operations, Inc.

Neal Parsons

SeungHwan Keum

Ruth Herrera Reed

Mei Yang

Nancy L Johnson

Alan L Browne

Paul W Alexander

Nilesh D Mankame

Xiujie Gao

Robin Stevenson

John R Czoykowski

Jason R Spenny

James Bloomsburgh

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.

Oleophilic surface treatments for enhanced heat-transfer characteristics of electric machines

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.

Oleophobic surface treatments for windage loss reduction and improved heat transfer properties of electric machines

A vent includes a vane configured for spatial movement, and at least one actuator in operative communication with the vane configured to spatially move the vane in at least one direction, wherein the actuator comprises an active material configured to undergo a change in at least one property upon receipt of an activation signal, wherein the change in at least one property is effective to selectively change an orientation of the vane.

Active material enabled vents and methods of use

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Onsted, MI, United States of America

Neal Parsons