Abstract: A stator for an electric machine and a production method for a stator are disclosed. The stator includes an annular stator body defining a longitudinal centre axis, the annular stator body having an outer circumference lateral surface that comprises longitudinal ribs projecting away radially to the outside and longitudinal cooling channels delimited by the longitudinal ribs which can be flowed through by cooling fluid. An annular outer housing sleeve axially arranged over the stator body. The stator body with the longitudinal ribs is non-rotatably fixed to the outer housing sleeve from radially inside in a frictionally locking manner.

Abstract: A stator for an electric machine may include a ring-shaped stator body defining a longitudinal centre axis, a plurality of electrically conductive stator windings fixed radially internally on the stator body with respect to the longitudinal centre axis, and a plurality of radial cooling apertures through which coolant is flowable. The stator windings may be encased by a plastic injection moulded body. The stator windings may project on both sides with respect to the longitudinal centre axis axially beyond the stator body such that the stator body is flanked axially on a first side by a ring-shaped first axial overhang and on a second side by a ring-shaped second axial overhang. The cooling apertures may penetrate at least one of the first axial overhang and the second axial overhang.

Abstract: An electrical machine includes a rotor, which can be rotated about an axis of rotation, with which an axial direction is defined, and a stator having stator windings, a coolant distribution chamber and a coolant collecting chamber arranged axially at a distance thereto, the coolant distribution chamber fluidically communicates with the coolant collecting chamber for cooling the stator windings, a cooling duct and a stator winding are embedded in an electrically insulating plastic for thermal coupling, the stator has stator teeth which extend along the axial direction, are spaced apart from each other along a circumferential direction and bear the stator windings, the electrically insulating plastic is arranged together with the cooling duct and the stator winding in an intermediate space, and the electrically insulating plastic is formed by a first plastic mass of a first plastic material and by a second plastic mass of a second plastic material.

Abstract: A rotor for an electric motor may include a shaft and a rotor core. The rotor core may include an adjacent front surface, at least one of a plurality of apertures and a plurality of cavities protruding along a rotor core body, a plurality of magnets, and a resin fixing the plurality of magnets within the rotor core. The rotor may further include a manifold of resin formed on the front surface of the rotor core. The manifold may be at least partially overlapping with at least one of at least one aperture of the plurality of apertures and at least one cavity of the plurality of cavities. The manifold may be at least one of bonded and restrained via the resin to the front surface of the rotor core.

Abstract: The present invention relates to a method for producing a rotor (1) of an electric motor (2) with laminated cores (4) arranged on a rotor shaft (3), in which—at least two laminated cores (4) twisted relative to one another in the circumferential direction (5) with magnet pockets (6) and magnets (7) arranged therein are arranged on the rotor shaft (3),—in the axial direction (8) between two laminated cores (4) at least one perforated disc (9) with at least one opening (10) is arranged such that the opening (10) overlaps and connects two magnet pockets (6) of two laminated cores (4) adjacent to the perforated disc (9),—a gap between the magnet pockets (6) and the magnets (7) is filled by means of a hardening casting compound (11) wherein the casting compound (10) flows through the opening (10).

Abstract: An electrical machine may include a rotor rotatable about an axis of rotation, by way of which an axial direction of the electrical machine may be defined, a stator having electrically conductive stator windings, and at least one cooling channel through which a coolant may be flowable for cooling the stator windings. The stator may have stator teeth extending along the axial direction, arranged spaced apart from another along a circumferential direction of the rotor, and bearing the stator windings. The at least one cooling channel and at least one stator winding may be arranged in at least one intermediate space formed between two stator teeth adjacent in the circumferential direction. A plastic for transferring heat from the at least one stator winding to the at least one cooling channel may be arranged in the at least one intermediate space.

Abstract: A rotor for an electric motor is disclosed. The rotor includes a hollow shaft and a laminated rotor core. The laminated rotor core includes a plurality of magnets and an impeller for a coolant flow utilization. The hollow shaft includes an inlet aperture for introducing the coolant directly into a main cavity of the hollow shaft, and channels through which the coolant is released out of the hollow shaft. Outlet apertures of the channels are aligned with an intake area of the impeller for propelling the coolant through a cooling system.

Abstract: An electric machine is disclosed. The electric machine includes a rotor group including a shaft that is rotatable about an axis of rotation and a rotor that is non-rotatably fixed to the shaft. A housing group includes a housing and a stator that is received in the housing. The rotor group is rotatably arranged in the housing group. At least two axially extending cooling channels are disposed in or on the stator. A first circulation chamber is disposed at a first axial end of the stator and a second circulation chamber is disposed at a second axial end of the stator. A flow path for guiding a coolant is formed at least by the at least two cooling channels and the first and second circulation chambers. The cooling channels can be flowed through in the flow path in parallel and/or in series with one another.

Abstract: A direct cooled electric motor for a traction drive of an electric vehicle, adapted to be cooled by a coolant, may include a housing receiving a stator core. The stator core may include a steel lamination stack, a rotor arranged to rotate radially inside the stator core, a plurality of windings extending axially through the stator core and axially beyond a plurality of axial ends of the stator core, and at least one ring-shaped end fiber. The end fiber may be arranged at a respective axial end of the stator core, may extend in a circumferential direction and in a radial direction over the respective axial end of the stator core, and may include a plurality of winding apertures arranged circumferentially around the end fiber. The windings may extend through the winding apertures. An inner diameter of the end fiber may be smaller than an outer diameter of the rotor.

Abstract: An electric machine may include a rotor group and a housing group. The rotor group may include a shaft rotatable about an axis of rotation and a rotor non-rotatably fixed to the shaft. The housing group may include a housing and a stator received in the housing. The rotor group may be rotatably arranged in the housing group. The stator may be disposed radially adjacent to the rotor and encircle the rotor with respect to the axis of rotation. The machine may further include at least two axially extending cooling channels, two circulation chambers disposed axially adjacent to the axial ends of the stator, and a flow path for guiding a coolant. The at least two cooling channels may extend axially through the entire stator and may be flowed through in the flow path at least one of in parallel and in series with one another.

Abstract: A method for producing a stator for an electric machine includes providing a stator with an annular stator body, from which a plurality of stator teeth protrude radially inwardly, wherein an intermediate space is formed in each case between two stator teeth that are adjacent in a circumferential direction, encapsulating two stator teeth adjacent in the circumferential direction with a first plastic mass, arranging a stator winding on a stator tooth, fixing the stator winding on the stator tooth by encapsulating said stator winding with a second plastic mass, following the encapsulation with the first plastic mass and before the fixing of the stator winding, a first mask is introduced into the intermediate space between the two stator teeth, such that the volume of the intermediate space that is filled with the first mask remains free from the second plastic mass to form a cooling duct during the encapsulation.

Abstract: An electric machine for a vehicle is disclosed. The electric machine includes a stator and a rotor rotatable relative to the stator about a rotational axis that defines an axial direction. A housing at least partially surrounds a housing interior and includes a first housing part and a second housing part that bound the housing interior. The rotor is rotatably mounted on the first housing part and the second housing part via a bearing device. At least one heat transmission body is arranged along the axial direction between at least one of the first and second housing parts and the rotor. The heat transmission body bounds, together with the at least one of the first and second housing parts, a coolant space through which a coolant can flow.

Abstract: An electric machine may include a stator, a rotor, a housing, and at least one heat transmission body. The housing may at least partially surround a housing interior. The housing may include a plurality of housing parts, which may bound the housing interior and on which the rotor is rotatably mounted via a bearing device. The heat transmission body may be arranged along the axial direction between at least one housing part of the plurality of housing parts and the rotor. The at least one heat transmission body and the at least one housing part may bound a coolant space through which a coolant is flowable. At least one of the plurality of housing parts may include an attachment section to which the at least one heat transmission body is attached. The bearing device may be disposed on the attachment section.

Abstract: An electric machine includes a rotor rotatable about a rotational axis, by which an axial direction is defined, and a stator with stator windings, a coolant distributor space and a coolant collector space. The coolant distributor space communicates fluidically with the coolant collector space to cool the stator windings with a cooling duct. The stator includes stator teeth supporting the stator windings and protruding radially inward from a stator body of the stator. A stator groove is formed between two stator teeth which has a radially outer groove zone extending radially inward away from the stator body into a radially inner groove zone, the radially inner zone width of which is smaller than the radially outer zone width, when measured along the circumferential direction, of the radially outer groove zone. At least one stator winding is embedded, for thermal coupling, into an electrically insulating plastic arranged in the stator groove.

Abstract: An electrical machine for a vehicle may include a rotor, a stator, a coolant distributor chamber and a coolant collector chamber. The rotor may be configured to be rotated about an axis of rotation defining an axial direction of the electrical machine. The stator may include a plurality of stator windings. The coolant collector chamber may be axially arranged at a distance from the coolant distributor chamber. The coolant distributor chamber may be configured to communicate fluidically with the coolant collector chamber by at least one cooling channel through which a coolant can flow. At least one of the stator windings may be embedded in at least one plastic mass consisting of an electrically insulating plastic for thermal coupling to the coolant. At least one of the coolant distributor chamber and the coolant collector chamber may be arranged at least partially in the at least one plastic mass.

Abstract: A method for producing a stator for an electrical machine includes providing the stator including a ring-shaped stator body, from which a plurality of stator teeth arranged spaced apart along a circumferential direction of the stator body protrude radially to the inside. A space is thereby provided between two stator teeth adjacent to one another in the circumferential direction. Second, a first injection molding of two stator teeth adjacent to one another in the circumferential direction with a plastic is performed. Third, a stator winding is arranged in the space. Fourth, a second injection molding of the stator winding arranged in the space with the plastic is performed such that an air gap and/or an air trap between the stator teeth injection molded in the second step and the stator winding after the arrangement of the stator winding in the space in the third step, is filled with the plastic.

Abstract: An electric machine includes a rotor, rotatable about an axis of rotation defining an axial direction, and a stator having stator windings, a coolant distribution chamber and a coolant collection chamber arranged axially at a distance thereto. The coolant distribution chamber fluidically communicates with the coolant collection chamber with a cooling channel through which a coolant can flow. The cooling channel and the stator winding are embedded in a plastic mass made of a plastic for thermal coupling to the coolant. The stator has stator teeth extending along the axial direction and spaced apart from one another along a circumferential direction and carrying the stator windings. The plastic mass is arranged together with the cooling channel and the stator winding in an intermediate space formed between two stator teeth arranged adjacent in the circumferential direction and sections of cooling channel are configured as a tube body within the intermediate space.

Abstract: A power electronics unit may include a circuit board and a cooling device. The circuit board may include at least one electronic component which, in a heat transfer region, is disposed flat against an electronics side of the circuit board. The cooling device may include at least one impingement jet chamber through which a cooling fluid is flowable from an inlet to an outlet. The cooling device may further include at least one nozzle plate having at least one flow nozzle. The at least one nozzle plate may be arranged in and divide the at least one impingement jet chamber into an inlet chamber and an outlet chamber, which may be fluidically connected to one another via the at least one flow nozzle. The at least one flow nozzle may accelerate and conduct the cooling fluid towards the heat transfer region of the at least one electronic component.

Abstract: An electrical machine may include a comprise a rotor, a stator, a coolant distributor chamber and a coolant collector chamber. The rotor may be rotated about an axis of rotation that defines an axial direction of the electrical machine. The stator may comprise a plurality of stator windings. The coolant collector chamber may be axially arranged at a distance from the coolant distributor chamber. The coolant distributor chamber may communicate fluidically with the coolant collector chamber by way of least one cooling channel through which a coolant can flow. The at least one cooling channel and the at least one stator winding may be embedded in a plastic mass consisting of an electrically insulating plastic for thermal coupling to the coolant.

Abstract: A method for producing a stator may include providing an annular stator body including a plurality of stator teeth arranged spaced apart from one another. The method may also include at least partially overmoulding at least two adjacent stator teeth with a first plastic mass. The method may further include arranging at least one stator winding on at least one stator tooth of the at least two stator teeth and fixing the at least one stator winding on the at least one stator tooth via at least partially overmoulding the at least one stator winding with a second plastic mass. The method may additionally include, prior to fixing the at least one stator winding, introducing a mask into an intermediate space defined between the at least two stator teeth to cover a surface portion of the stator body bounding the intermediate space radially outside.