Abstract: A cooling system for an electric traction machine for a motor vehicle, including a circuit system for conducting a first coolant to be circulated, a first circulation pump for conveying the first coolant in the circuit system, an AC housing for an AC connection for the electric traction machine, and a motor inlet connection for fluidly connecting the circuit system on the input side to the electric traction machine to be temperature-controlled. The cooling system further includes a motor outlet connection for fluidly connecting the circuit system on the output side to the electric traction machine to be temperature-controlled, a first heat exchanger for dissipating heat from and/or supplying heat to the first coolant to be circulated in the circuit system, and a first main line, by which the first heat exchanger and the AC housing are fluidly connected to one another.

Abstract: A cooling system for an electric traction machine for a motor vehicle, including a circuit system for conducting a first coolant to be circulated, a first circulation pump for conveying the first coolant in the circuit system, and a motor inlet connection for fluidically connecting the circuit system on an inlet side with a first winding head region of an electric traction machine to be temperature-controlled. The cooling system includes a motor outlet connection for fluidically connecting the circuit system on an outlet side with a second winding head region of the electric traction machine to be temperature-controlled and a first heat exchanger for dissipating heat from and/or supplying heat to the first coolant. The cooling system includes a bypass line, by which the first heat exchanger via at least one connection and the second winding head region are directly fluidically connected to one another via a further connection.

Abstract: A cooling system for an electric traction machine, including a circulation system for guiding a first cooling liquid, a first circulation pump for conveying the first cooling liquid in the circulation system, and a motor inlet connection for fluidically connecting the circulation system on an inlet side to a first winding head region of an electric traction machine intended to be temperature-controlled. The cooling system includes a motor outlet connection for fluidically connecting the circulation system on an outlet side to a second winding head region of an electric traction machine intended to be temperature-controlled, and a first heat exchanger for dissipating heat from and/or supplying heat to the first cooling liquid. A plurality of cooling grooves are arranged between the winding head regions to guide the first cooling liquid. Respective highest locations on the winding head regions are fluidically connected to each other by a second deaeration line.

Abstract: An expansion tank for a cooling system includes at least one inlet for a coolant oil, a first outlet for the coolant oil, a second outlet for a gas, and a connecting channel between the at least one inlet and the first and second outlets. By a horizontal offset, one of the inlets for the coolant oil and the second outlet for a gas are always arranged above the first outlet for the coolant oil in an installation situation in any operating state. A filter medium for removing particles and/or water from the coolant oil is provided between the at least one inlet and the first outlet.

Abstract: A cooling system for an electric traction machine for a motor vehicle includes a circuit system for conducting a first coolant to be circulated, a circulation pump for conveying the first coolant in the circuit system in a first circulation direction, and an expansion tank filled at least partially with the first coolant and at least partially with a gas. The cooling system also includes a motor input terminal for fluidically connecting the circuit system on an input side to the electric traction machine, a motor output terminal for fluidically connecting the circuit system on an output side to the electric traction machine, and a first heat exchanger for dissipating heat from and/or supplying heat to the first coolant. The expansion tank is exclusively connected on a gas side to at least one volume equalization tank which is closed gas-tight to an environment.

Abstract: An electric motor vehicle traction motor, including: a liquid-cooled motor stator, a dry-running motor rotor, and a fluid-tight split cage which separates the motor stator and the motor rotor from one another fluidically, the split cage being formed by a fiber composite body, wherein the split cage is axially prestressed in a long-lasting manner by a split cage axial stressing apparatus.

Abstract: A cooling system for cooling an electric machine of a motor vehicle, including a supply line, at least one cooling line, and a bypass line. The supply line is for supplying a cooled coolant to a first winding head region of the electric machine. The at least one cooling line leads from the first winding head region through a stator of the electric machine up to a second winding head region of the electric machine. The bypass line is guided from the first winding head region to the second winding head region past the stator. The bypass line, to collect and/or discharge air, exits from the first winding head region at a highest position in a direction of gravity and/or opens into the second winding head region at a highest position in the direction of gravity.

Abstract: A drive unit includes an electric motor for propulsion and a cooling system. The electric motor includes a stator assembly and a rotor assembly, the stator assembly including a housing, a core with grooves, and a winding assembly. The winding assembly extends through the grooves. The housing includes a housing inlet and outlet. The cooling system includes a first cooling circuit to enable a direct cooling of the winding assembly. The first cooling circuit includes an expansion tank assembly, including a tank, a tank inlet and outlet, and a volume change assembly. The volume change assembly enables change of the total volume of the first cooling circuit as a function of pressure in the first cooling circuit such that, as the pressure in the first cooling circuit increases, a first volume is increased and, as the pressure in the first cooling circuit decreases, the first volume is reduced.

Abstract: A cooling system for an electric traction machine includes a looped conduit system for conducting a first cooling liquid and a circulation pump for conveying the first cooling liquid in a first circulation direction. The cooling system includes an expansion tank filled at least partially with the first cooling liquid and a gas, and a motor input terminal for fluidically connecting the looped conduit system on an input side to the electric traction machine. The cooling system includes a motor output terminal for fluidically connecting the looped conduit system on an output side to the electric traction machine and a first heat exchanger for dissipating heat from and/or supplying heat to the first cooling liquid. In the first circulation direction, the first heat exchanger is arranged downstream of the electric traction machine and connected via the motor input and output terminal and upstream of the expansion tank.

Abstract: A drive unit for an electric vehicle including an electric motor, with a stator assembly and rotor assembly, and a cooling system. The stator assembly includes a housing, a stator core having grooves, and a winding assembly. The winding assembly extends through the grooves. The housing includes a housing inlet and outlet connected the grooves. The cooling system includes a first cooling circuit connected to the housing inlet and outlet to enable direct cooling of the winding assembly. The first cooling circuit includes an expansion tank assembly including an expansion tank, at least one inlet, one outlet, and a pressure equalization assembly. The expansion tank is connected to the first cooling circuit via the at least one inlet and the outlet. The pressure equalization assembly enables a connection between the expansion tank and an ambient environment to cause a pressure equalization between the expansion tank and ambient environment.

Abstract: A cooling system for an electric traction machine for a motor vehicle includes a looped conduit system for conducting a first cooling liquid and a circulation pump for conveying the first cooling liquid in the looped conduit system in a first circulation direction. The system further includes an expansion tank filled at least partially with the first cooling liquid and at least partially with a gas and a motor input terminal for fluidically connecting the looped conduit system on an input side to an electric traction machine to be temperature-controlled. The system further includes a motor output terminal for fluidically connecting the looped conduit system on an output side to the traction machine and a first heat exchanger for dissipating heat from and/or supplying heat to the first cooling liquid. The expansion tank is configured with an aperture that is open to the environment.

Abstract: A drive train (100) has an electric machine (1) with a stator (2), an inverter (3) and a connection housing (4) with a coolant chamber (4.1) in which an electric conductor (5) for connecting a directly liquid-cooled stator winding (2.2) of the stator (2) to the inverter (3) is arranged. The coolant chamber (4.1) is open in a liquid-permeable manner toward a stator chamber (2.1) of the stator (2) at an opening (4.3). The electric conductor (5) is guided out of the coolant chamber (4.1) to the inverter (3) at a leadthrough (4.2), and the leadthrough (4.2) is sealed in a liquid-tight manner. A motor vehicle (200) with the drivetrain (100) also is provided.

Abstract: A motor vehicle including a drive unit with an electric machine, wherein the electric machine is a directly cooled electric machine, a transmission, a first cooling loop for cooling assemblies of the directly cooled electric machine using a first dielectric coolant which flows directly around respective assemblies of the electric machine, a second cooling loop for cooling the transmission using a second coolant designed as a transmission oil, and a third cooling loop using a third coolant. The first cooling loop and the third cooling loop are coupled via a first heat exchanger, and the second cooling loop and the third cooling loop are coupled via a second heat exchanger.

Abstract: A drive train (1) for a motor vehicle (100) has an electric machine (2) with a rotor (3), a stator (4) and an air gap (5) between the rotor (3) and the stator (4). The drive train (1) also has a transmission (6) and a cooling circuit (7) for conducting a coolant through the electric machine (2) and the transmission (6). The coolant is provided for lubricating and cooling the transmission (6) and for directly cooling electrical conductors of the stator (4). The cooling circuit (7) is provided in such a way that the coolant does not enter the air gap (5).

Abstract: A temperature control arrangement (1) of a motor vehicle has an electric machine (2) with a rotor (3) and a stator (4), a stator cooling arrangement with a first cooling circuit (6) for cooling the stator (4) with a first cooling medium (8) flowing in the first cooling circuit (6) that is formed by a motor vehicle cooling circuit, a rotor cooling arrangement with a second cooling circuit (7) for cooling the rotor (3) with a second cooling medium (9) flowing in the second cooling circuit (7) that is formed by a transmission oil cooling circuit, a heat exchanger (10) that thermally couples the first cooling circuit (6) and the second cooling circuit (7). The stator cooling arrangement is configured such that the first cooling medium (8) makes direct contact with the stator windings.

Abstract: An electric machine (1) has a housing (2) in which a stator (3) and a rotatable rotor (4) are arranged. The stator (3) is of hollow-cylindrical design and is arranged in a stator chamber (5) of the housing (2). The rotor (4) is arranged radially inside the stator (3) in a rotor chamber (8). An air gap (9) is provided between the rotor (4) and the stator (3) to permit rotation of the rotor (4) relative to the stator (3). The stator chamber (5) is delimited radially on the inside by a cylindrical wall (10) that is sealed with respect to the housing (2) by at least one sealing element (12). The housing (2) has at least one axially projecting protrusion (13) that forms an axial end face (17) and a radially outwardly facing circumferential shoulder (18) that supports the sealing element (12).

Abstract: A canned motor, including: a motor housing, a stator fixed to the motor housing, a rotor mounted on the motor housing so as to be rotatable relative to the stator about an axis of rotation, a can fixed to the stator radially between the stator and the rotor, at least one annular seal carrier fixed to the motor housing, radially inside the can, at an axial stator end, and at least one annular seal supported radially and axially on the seal carrier, the at least one annular seal configured to seal off a rotor space, in which the rotor is arranged, from a stator space through which a coolant can flow, wherein the stator space has a main region and an annular region, which extends from the at least one annular seal along the seal carrier and merges into the main region at a distance from the seal.

Abstract: A stator for an electric machine includes a laminated stator core having stator slots arranged along an axial direction parallel to a stator axis, electric conductors arranged in the stator slots; and fluidtight slot insulators arranged in the stator slots between the electric conductors and the laminated stator core, wherein the slot insulators each have a cooling channel spaced apart from the electric conductors in a radial direction arranged orthogonally to the axial direction.

Abstract: An electric motor vehicle traction motor, including: a liquid-cooled motor stator, a dry-running motor rotor, and a fluid-tight split cage which separates the motor stator and the motor rotor from one another fluidically, the split cage being formed by a fiber composite body, wherein the split cage is axially prestressed in a long-lasting manner by a split cage axial stressing apparatus.

Abstract: A method for producing a stator includes: providing a main body, the main body having: a cavity for accommodating a rotor, and a plurality of slots, extending axially through the main body, the plurality of slots accommodating electrical conductors of a winding, providing slot insulation so as to ensure that a slot interior of each slot of the plurality of slots is electrically insulated from the main body and is fluidtight; and forming a respective end plate on each of two ends of the main body, the end plates being attached in a fluidtight manner to the main body so as to ensure that no fluid can get between the end plate and the main body and reach the cavity of the main body. Each end plate has a radial part and an axial part, and the axial part has an insert.