Abstract: A clutch device for a motor vehicle includes a disc pack and an actuation device. The disc pack includes an outer disc pack and an inner disc pack arranged. The actuation device includes a retaining element, a primary piston, a secondary piston and a spring element. The primary piston and the secondary piston are each arranged on the retaining element in an axially displaceable manner and delimit respective pressure chambers. The spring element is integrally formed with the secondary piston and connects the primary and secondary pistons. When a pressure is applied to a pressure medium in the primary pressure chamber, the primary piston is arranged to move the outer disc pack against the inner disc pack and frictionally transmit torque. When a pressure is applied to a pressure medium in the secondary pressure chamber, the secondary piston is arranged to move the primary piston against the outer disc pack.

Abstract: The disclosure relates to a method for controlling the position of a rotor of an electric machine, in particular a permanently-excited synchronous machine with two separate winding systems, and each of the winding systems is controlled by an independent cascade control assigned to the respective winding system. Each of the two cascade controls includes i) an inner current-control circuit which controls a current of the electric machine, ii) a central speed-control circuit which is superordinate to the inner current-control circuit and which controls a speed of the electric machine, and, iii) an outer position-control circuit which is superordinate to the central speed-control circuit and controls the position of the rotor of the electric machine. The speed-control circuit has a speed controller without an I-component, in particular a P-controller.

Abstract: An electromagnetic actuator comprises a housing, front and rear magnetic poles, and a guide sleeve. The front magnetic pole is fixed to the housing, the housing has a cavity, the cavity has a closed end and an open end, the open end is closed by the front magnetic pole, and the rear magnetic pole and the guide sleeve are mounted in the cavity; the guide sleeve has a first end facing the open end, a second end facing the closed end, an elastically deformable flange at the first end, and a radially stepped surface at an axially middle portion facing the closed end; the rear magnetic pole is axially abutted between the radially stepped surface and the closed end; and the flange is elastically abutted against the front magnetic pole, such that the guide sleeve and the rear magnetic pole are axially positioned with respect to the housing.

Abstract: A torque-distribution device includes a rotor carrier couplable to an input shaft, a clutch device having a disc pack, and an actuation device for actuating the clutch device. The actuation device includes a primary piston, and a secondary piston. The primary piston delimits a primary pressure chamber and is movable against the disc pack when pressure is applied to the primary pressure chamber. The secondary piston delimits a secondary pressure chamber and is movable to move the primary piston against the disc pack when pressure is applied to the secondary pressure chamber. Pressure medium arranged in the primary pressure chamber is supplied by a first feed line and pressure medium arranged in the secondary pressure chamber is supplied by a second feed line, independent of the first feed line, such that pressure can be applied to the primary piston and to the secondary piston independently.

Abstract: A bearing seat assembly comprising first and second bearing seats, and linear bearings located there between. A convex portion protruding toward a first bottom portion of the first bearing seat is formed in the central portion of a second bottom portion of the second bearing seat, and a recessed shape recessed toward a direction away from the first bottom portion is formed in a part of the second bottom portion between the convex portion and both end portions of the second bottom portion. A concave portion opposite to the convex portion is formed in the first bottom portion, the concave portion has an opening that is open toward the convex portion, and the convex portion is inserted into the concave portion by passing through the opening, so that the stress distribution and magnitude of the second bearing seat are optimized, and the risk of failure of the linear bearings is reduced.

Abstract: A torque distribution device includes a rotor support, an internal disc carrier, a clutch device including a disc pack and an actuation device for actuating the clutch device. The actuation device includes a stationary holding element, a spring element, and primary and secondary pistons axially displaceably mounted on the holding element. The primary piston delimits a primary pressure chamber and is arranged to be moved in a first axial direction against the disc pack the primary pressure chamber is pressurized. The secondary piston delimits a secondary pressure chamber and is movable counter to a restoring force of the spring element in a direction opposite the first axial direction the secondary pressure chamber is pressurized. The spring element is coupled to the primary piston to move the primary piston in the direction opposite the first axial direction when the secondary pressure chamber is depressurized.

Abstract: An electrical machine for driving a motor vehicle includes a housing, a stator, which is fixedly accommodated in the housing, and a rotor, which is mounted rotatably relative to the stator. The stator has a laminated core composed of a plurality of punched lamination segments and has a wire winding region connected to the laminated core. Each lamination segment has, on its radial exterior, at least one radial recess also created by means of the punching production. A coolant guide channel is delimited directly by an outer periphery of the laminated core. A recess of a first lamination segment is spaced apart, along the outer periphery, from a recess of a second lamination segment directly abutting the first lamination segment in such a way that the recess of the first lamination segment is at least partly axially covered by an end face of the second lamination segment.

Abstract: A motor braking procedure is controlled for an electric motor that provides a drive torque for a vehicle and is driven electrically by an inverter circuit having a plurality of switching elements via at least two motor connections and has a rotor rotatable at a motor speed. A braking switch position is adopted by the inverter circuit in braking switch position intervals. An open switch position is adopted by the inverter circuit in open switch position intervals. The braking switch position intervals are alternately switched with the open switch position intervals based on a motor speed being less than a limit speed during the motor braking procedure. The rotor, during the electric motor braking procedure, is subject to a speed-dependent braking torque based on the inverter circuit adopting a braking switch position and is subject to a braking torque less than that in the braking switch position or no braking torque based on the inverter circuit adopting an open switch position.

Abstract: A drive system (1) having a unipolar machine (2) and a fuel cell (3) for supplying the unipolar machine (2) with electrical energy. The fuel cell (3) can be arranged in a ring shape around a rotor shaft (5) of a rotor (4) of the unipolar machine (2). The unipolar machine (2) can be provided in a motor vehicle (600) to supply a traction torque.

Abstract: An electric machine includes a stator having a winding including a plurality of conductors assigned to one or more phases and at least one temperature sensor assembly having a temperature sensor section with a temperature sensor for detecting the temperature of the winding. The ends of at least one part of the conductors on the inner or outer circumference of the winding protrude axially or radially over the winding, wherein an interconnection ring comprising at least one conductor bridge is placed axially or radially on the winding. The ends of at least two respective conductors assigned to a phase protrude radially or axially outwards. The temperature sensor section has a sensor housing which is introduced into a housing recess provided on the interconnection ring in such a way that the temperature sensor is in thermal contact with the connection conductor or the conductor bridge.

Abstract: A gearbox cover includes a front side with a planetary carrier and a back side with a flow passage. The planetary carrier includes a first annular portion with a plurality of holes, a second annular portion, axially spaced from the first annular portion, with a first plurality of through holes, each aligned with one of the holes, and a plurality of webs connecting the first annular portion with the second annular portion. In an example embodiment, the front side also includes a tubular portion. A gearbox cover assembly with a flow passage cover and a planetary gear assembly are also disclosed.

Abstract: A sump arrangement for a transmission includes a first sump arranged for receiving a hydraulic fluid at a first location, a second sump arranged for receiving the hydraulic fluid at a second location, different than the first location, a transmission pump with an inlet, and a valve for selectively hydraulically connecting the inlet to the first sump or to the second sump. The transmission pump is arranged for pumping the hydraulic fluid through the transmission. In some example embodiments, the valve is a spool valve. In an example embodiment, the valve is an inertia valve.

Abstract: The disclosure relates to a method of and system for monitoring the state of a device that includes a rotatable component. The system includes a structure-borne noise meter and an evaluation device. The evaluation device ascertains a time range feature for a frequency band, compares the time range feature with at least one threshold to determine a time range feature state, and determines the state of the device based on the time range feature state.

Abstract: A detection system and a wind driven generator. The detection system includes: a plurality of passive wireless sensors respectively provided at the corresponding positions to be detected, which are used for obtaining detection signals of the positions to be detected; and a leaky coaxial cable provided along the position to be detected, wherein the leaky coaxial cable can emit electromagnetic waves to drive the plurality of passive wireless sensors, and can receive the detection signal sent by the passive wireless sensors. The detection system can save installation space, as well as reduce maintenance costs since there is no need to replace a battery regularly, and when conducting multi-point measurements, costs are reduced and the number of passive wireless sensors that the system can configure is increased.

Abstract: An electrochemical system comprises a plurality of stacked bipolar plates, each of which is composed of two structured half-plates that describe corrugation peaks and corrugation valleys. Coolant channels are formed between the half-plates of each bipolar plate by means of the corrugation peaks and corrugation valleys, and at the same time the outer faces of the bipolar plates delimit flow channels for operating media. A membrane assembly is located between each pair of bipolar plates. An assembly of flow channels, said assembly being mirror-symmetrical with respect to a plane on which the membrane assembly lies, transitions into an assembly which is offset in the transverse direction in a transition region between an active field and a distributing field of each bipolar plate.

Abstract: A double-row ball bearing, in particular for adjusting the blades of a tail rotor of a helicopter, including an inner ring and an outer ring as the bearing rings, and balls rolling off between the bearing rings and designed to transmit axial forces between the bearing rings in both directions, the outer ring being tiltably supported in a housing part.

Abstract: An electric machine, having a stator and a rotor arranged rotatably in the stator (3), and an end shield arranged non-rotatably with respect to the stator for mounting the rotor therein. The end shield extends at least partially along a radial plane orthogonal to the rotor axis of rotation. The stator is connected to a stator support which extends orthogonal to the axis. The end shield and the stator support have a centering arrangement for centering the end shield with respect to the stator support, which has an annular opening having a radially inner peripheral surface designed as a centering seat, and is abutted by at least three centering studs projecting axially from the end shield. The centering studs are configured to form with the inner peripheral surface the centering arrangement for centering the end shield with respect to the stator support.

Abstract: A booster clutch includes a pilot-control clutch, a booster output side, a booster input side, a rocker element, a first energy storage element and a drum. The pilot-control clutch has a friction pack and a torque is frictionally transmittable when the friction pack is in a pressed state. The booster output side is torsionally fixed to a pilot-control input side and the booster input side is arranged to be torsionally fixed to an input shaft. The first roller is arranged via a ramp pairing between the rocker element and the booster input or output side. The first energy storage element is arranged between the rocker element and the booster output or input side, or is arranged to transmit a radial force to the rocker element. The first roller applies a predetermined torque over the booster input and output side, and presses the rocker element radially against the drum.

Abstract: An axial flux machine including a rotor rotatably mounted relative to a stator, the stator having at least one first disc-shaped stator body, and the rotor as well as the first stator body being arranged such that a first magnetically effective gap through which a cooling fluid can flow is formed axially between the first stator body and the rotor. The axial flux machine has at least one first cooling circuit in which the cooling fluid, during operation of the axial flux machine, enters the first gap at a radially inner periphery, flows through the first gap outwardly in the radial direction, and exits the first gap at a radially outer periphery, wherein at least one first cooling channel which can be traversed by the cooling fluid is arranged at the outer periphery of the first gap and guides the cooling fluid back to the radially inner periphery of the first gap.

Abstract: A shifting device (1) for the powertrain of a motor vehicle, including a control shaft (10) for adjusting a control element (9), the control shaft (10) has a first sub-section (15) which can be driven by an actuator (36) and a second sub-section (16) which is designed to adjust the control element (9). The first sub-section (15) is rotatably mounted relative to the second sub-section (16). A spring element (11), via which a torque of the first sub-section (15) can be transmitted to the second sub-section (16), is provided between the two sub-sections (15, 16).