A motor assembly includes a motor, a controller, a fan, and a shroud. The motor includes a stator and a rotor rotatable about an axis. The controller is located axially from the motor and operable to at least in part control the motor. The fan is interposed axially between the stator and the controller. The fan is configured to propel a fluid. The shroud is configured to direct the fluid propelled by the fan in an axial direction.

A motor assembly includes a motor, a controller, a fan, and a shroud. The motor includes a stator and a rotor rotatable about an axis. The controller is located axially from the motor and operable to at least in part control the motor. The fan is interposed axially between the stator and the controller. The fan is configured to propel a fluid. The shroud is configured to direct the fluid propelled by the fan in an axial direction.

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.

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.

A system and a vehicle are described. An illustrative system includes a vacuum chamber and one or more components of a motor. The one or more components of the motor may be provided in the vacuum chamber and may be configured to move in a partial or complete vacuum created within the vacuum chamber.

A reciprocating tool includes a motor, a reciprocating member, and a crank mechanism. The motor is disposed in a housing. The reciprocating member projects from the housing. The crank mechanism converts rotation of a rotation shaft of the motor into reciprocation of the reciprocating member. The crank mechanism rotates around an axis in a lateral direction by rotation transmission from the rotation shaft, and the crank mechanism includes a crank member having an eccentric pin, a connecting rod coupling the eccentric pin to the reciprocating member, and a balancer coupled to the eccentric pin, and the balancer is supported by the eccentric pin alone in the housing.

In an electric power steering device, a motor housing includes an end face part opposite to an output part of a rotating shaft of an electric motor. A power conversion circuit part includes a power conversion switching circuit part, and a second part exclusive of the power conversion switching circuit part. The power conversion switching circuit part includes an upper arm switching element and a lower arm switching element packaged by synthetic resin, and is mounted on a power conversion switching circuit board that is mounted to a power conversion switching circuit part heat dissipation section of the end face part for heat dissipation. A power supply circuit part and the second part of the power conversion circuit part are mounted on a power supply circuit board that is mounted to a power supply circuit part heat dissipation section of the end face part for heat dissipation.

In an electric power steering device, a motor housing includes an end face part opposite to an output part of a rotating shaft of an electric motor. A power conversion circuit part includes a power conversion switching circuit part, and a second part exclusive of the power conversion switching circuit part. The power conversion switching circuit part includes an upper arm switching element and a lower arm switching element packaged by synthetic resin, and is mounted on a power conversion switching circuit board that is mounted to a power conversion switching circuit part heat dissipation section of the end face part for heat dissipation. A power supply circuit part and the second part of the power conversion circuit part are mounted on a power supply circuit board that is mounted to a power supply circuit part heat dissipation section of the end face part for heat dissipation.

A motor, a reduction gear, a differential gear, and a housing having a cylindrical shape are included. The motor has a rotor and a stator. The rotor rotates around a motor axis. The stator faces the rotor in a radial direction with a gap interposed between them. The reduction gear includes a planetary gear mechanism, and can increase rotational power output from the motor according to a reduction ratio. The differential gear distributes and outputs the rotational power from the reduction gear. The housing houses the motor, the reduction gear, and the differential gear arranged in an axial direction with the motor axis as a common rotation axis. The housing includes a first attachment portion and a second attachment portion arranged on an outer peripheral surface. The first attachment portion and the second attachment portion are arranged on the opposite sides in a direction perpendicular to the axial direction with respect to the motor axis.

A motor, a reduction gear, a differential gear, and a housing having a cylindrical shape are included. The motor has a rotor and a stator. The rotor rotates around a motor axis. The stator faces the rotor in a radial direction with a gap interposed between them. The reduction gear includes a planetary gear mechanism, and can increase rotational power output from the motor according to a reduction ratio. The differential gear distributes and outputs the rotational power from the reduction gear. The housing houses the motor, the reduction gear, and the differential gear arranged in an axial direction with the motor axis as a common rotation axis. The housing includes a first attachment portion and a second attachment portion arranged on an outer peripheral surface. The first attachment portion and the second attachment portion are arranged on the opposite sides in a direction perpendicular to the axial direction with respect to the motor axis.