A method of manufacturing a motor case for an electric motor of an e-boosting device in which the motor case is received within an outer housing to cooperatively define a coolant jacket. The method includes forming a shell member. The method also includes overmolding a dam member to the shell member. The dam member projects from an outer surface of the shell member. The overmolding of the dam member includes forming a molded through-hole through the dam member. The dam member and the outer surface are configured to define a fluid boundary for a coolant of the coolant jacket when the motor case is received in the outer housing. The through-hole defines a passage for the coolant in the coolant jacket.

This application provides a motor cooling system of an electric vehicle. In the cooling system, a coil cooling oil passage includes a first oil outlet that is at an end portion of a stator core. A core cooling oil passage and the coil cooling oil passage are sequentially connected. In this case, cooling oil first enters the core cooling oil passage, and then enters the coil cooling oil passage. The core cooling oil passage extends in a circumferential direction of the stator core. The coil cooling oil passage extends in an axial direction of the stator core. A power apparatus drives the cooling oil to enter the core cooling oil passage from an oil inlet, flow through the core cooling oil passage, and enters the coil cooling oil passage from an oil through port. The cooling oil flows back to an oil return groove from the first oil outlet.

A motor assembly can include a motor shaft, a stator assembly, and a rotor assembly, and can include a cooling jacket. The cooling jacket can include an inner wall facing radially inwardly towards the stator assembly and an opposite outer wall facing radially outwardly, a circumferential internal fluid passageway for allowing a cooling fluid to be pumped through an interior of the cooling jacket, the internal fluid passageway being disposed between the inner and outer walls and extending between an inlet and an outlet, a mounting pad receiving, at an opening in the outer wall, a heat generating component associated with the motor assembly, the opening being in fluid communication with the internal fluid passageway such that the cooling fluid can provide cooling to the heat generating component.

A drive unit has a first electric rotary machine and a second electric rotary machine as well as a first shaft and a second shaft. The first electric rotary machine is arranged at least partly radially and axially within an area radially delimited by the second electric rotary machine, and the stator of the first electric rotary machine and the stator of the second electric rotary machine are mechanically fixed to each other. The drive unit comprises a coolant supply device which is arranged adjacently to the stators in the axial direction and by means of which coolant can be supplied axially between and/or into the stators.

A drive unit has a first electric rotary machine and a second electric rotary machine as well as a first shaft and a second shaft. The first electric rotary machine is arranged at least partly radially and axially within an area radially delimited by the second electric rotary machine, and the stator of the first electric rotary machine and the stator of the second electric rotary machine are mechanically fixed to each other. The drive unit comprises a coolant supply device which is arranged adjacently to the stators in the axial direction and by means of which coolant can be supplied axially between and/or into the stators.

A drive device for driving wheels of a motor vehicle includes a housing, an electric machine with a stator and rotor, a first output shaft for driving a first wheel, and a second output shaft for driving a second wheel. Via a differential transmission, first and second planetary gearsets are drivable by the rotor. First and second differential shafts transfer drive power from the differential transmission to the first and second planetary gearsets. The first differential shaft is mounted rotatably on an input shaft via bearings and the rotor is connected non-rotationally to the input shaft. A stable and non-buckling bearing of the second differential shaft in relation to the rotor is carried out via further bearings arranged on the second differential shaft or in the first differential shaft. The further bearings are arranged spaced apart from one another at least at a distance of twice an average bearing diameter.

A rotating electric machine includes a multi-phase armature coil having phase windings each constituted of a plurality of partial windings, and a winding support member supporting the partial windings from a radially outer or radially inner side thereof. Each of the partial windings has a pair of intermediate conductor portions and a pair of bridging portions connecting the pair of intermediate conductor portions. All the intermediate conductor portions of the partial windings are arranged in alignment with each other in a circumferential direction. In each of the partial windings, insulating members are mounted respectively on the bridging portions of the partial winding. Brackets are provided respectively in corresponding ones of the insulating members of the partial windings in such a manner as to partially protrude from the corresponding insulating members. Protruding portions of the brackets, which protrude from the corresponding insulating members, are mechanically joined to the winding support member.

A rotating electric machine includes a multi-phase armature coil having phase windings each constituted of a plurality of partial windings, and a winding support member supporting the partial windings from a radially outer or radially inner side thereof. Each of the partial windings has a pair of intermediate conductor portions and a pair of bridging portions connecting the pair of intermediate conductor portions. All the intermediate conductor portions of the partial windings are arranged in alignment with each other in a circumferential direction. In each of the partial windings, insulating members are mounted respectively on the bridging portions of the partial winding. Brackets are provided respectively in corresponding ones of the insulating members of the partial windings in such a manner as to partially protrude from the corresponding insulating members. Protruding portions of the brackets, which protrude from the corresponding insulating members, are mechanically joined to the winding support member.

An electric motor (1), in particular, an external rotor motor, has a stator (10) with a stator core (11), a non-rotatably attached shaft (20), that extends in the axial direction (A) of the motor, and a rotor bell (30), rotatably arranged relative to the non-rotatable shaft (20). The rotor bell (30) has cooling ribs in an open, spoke-like design rotatably mounted on the shaft (20) by at least one first stator-side bearing shield (31). A cooling device (40) is arranged between and connects the shaft (20) and the stator core (11). The cooling device (40) has a plurality of axial flow openings (41) arranged in the circumferential direction that causes cooling when the motor rotates during operation.

The present disclosure provides for an electric motor that comprises a housing and a shaft disposed through the housing. The electric motor further comprises a rotor fitted on the shaft within the housing and a stator disposed within the housing and around the rotor. The electric motor further comprises a fan covering disposed on a first end of the housing and a first bearing cap disposed at the first end of the housing, wherein the first bearing cap is configured to house a first bearing, wherein the first bearing cap comprises a plurality of protrusions configured to operate as a heat sink for the electric motor. The electric motor further comprises a first fan disposed at an end of the shaft and within the fan covering, wherein the first fan is operable to generate a first airflow configured to flow over an external surface of the housing.