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Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Schaeffler Technologies Ag & Co .kg

Hill, Wolfgang

Wolfgang Hill

Wolfgang Reik

Martin Zimmermann

Matthias Gramann

Juergen Gerhart

Lászlo Mán

Wai-Wai Buchet

Martin Rapp

Michael Oliver Kobes

Michael Menzel

Maria Holland

Achim Weber

An electric machine () and to a method for producing the machine (), including a housing () and a stator () accommodated therein, as well as at least one rotor () arranged radially inside the stator (), a plastic body () that at least radially surrounds the outside of a soft-magnetic core () of the stator (), and a cooling device () located between the stator () and the housing () is provided. In order to improve the cooling device (), at least one recess () that conveys a cooling medium is created between the housing () and the stator () at least partially in the outer circumferential surface of the plastic body ().

Electric machine with a cooling device, and method for producing said machine

A clutch actuator and to a method for the control thereof. The actuator actuates a multi-disk clutch, and to do so has actuator modules. The number of which corresponds to the number of the friction clutches. The modules have separate control units and electric motors, which are controlled by the control units and act on the friction clutches by a disengaging mechanism. In order to counter block the partial drive trains disposed downstream of the friction clutches, particularly automatically closed friction clutches during a malfunction of an actuator module, the actuator modules are connected among each other to a data line, which allows monitoring of the actuator modules and counter-measures.

Clutch actuator and method for the control thereof

A linear actuator, in particular for adjusting the flaps in motor vehicle turbochargers. The linear actuator has an adjusting element that can be linearly displaced by an electric motor. The electric motor is a two-phase transverse flux machine. A rotor is arranged between two opposite single-phase stators, and the rotor is connected in a rotationally fixed manner to a rotatable and linearly stationary rotational element that engages with the linearly movable adjusting element in order to cause a linear movement of the adjusting element when the rotational element is rotated.

Linear actuating drive, in particular for adjusting the flaps in motor vehicle turbochargers

A power stage for driving an electric machine comprising at least two semiconductor switches designed as semiconductor chips, which are connected by at least one bridge conductor to form a half bridge. The semiconductor switches area contact with each one of their contact surfaces an electric conductor track. The conductor tracks and the at least one bridge conductor are connected to the electric connection terminals for the machine and/or the power supply. The at least one bridge conductor is designed as conductor element which is arranged in at least one plane which is partially disposed approximately parallel to the extension plane of at least one of the conductor tracks. The at least one bridge conductor area contacts the semiconductor switches at a second contact surface which is disposed opposite the first contact surface which is connected to one of the conductor tracks.

Power stage for driving an electric machine

A device for actuating components of a motor vehicle has at least two electric motors, each of which has at least one stator unit and one rotor unit, and a control device for the electric motors, which has at least one logic device and one power device. The control device is fixedly connected to at least one component of both electric motors.

Actuating device for motor vehicle components

A magnetic friction clutch has two clutch parts, supported so that they can rotate relative to each other around an axis of rotation. A first clutch part has at least two clamping jaws which are movable somewhat toward and away from each other. A second clutch part, situated between the clamping jaws, is of disk-shaped design. The clamping jaws are pressable against the second clutch part by the magnetic force of a variable magnetic flux which is carried in the clutch parts in a soft magnetic material, in order to form a frictionally engaged connection between the clutch parts. The second clutch part has a plurality of soft magnetic ring zones permeated by the magnetic flux, which extend in the circumferential direction and are separated from each other in the radial direction by slots running in the circumferential direction. Ring zones adjacent to each other in the radial direction are connected with each other by bridging links. The slots are filled with a solidified casting material that connects the ring zones with each other. Inner and/or outer circumferential surfaces of the ring zones that face each other follow a line that deviates from a circular line running concentric to the axis of rotation. The second clutch part can have a plurality of layers made of different soft magnetic materials.

Magnetic friction clutch

An electromagnetic friction clutch has at least two clutch parts that are mounted so as to be rotatable relative to each other and movable toward and away from each other and that touch each other with a contact force in the position of use. The clutch parts are located in a magnetic circuit, which is guided in the clutch parts in a soft magnetic material in sheet form. Positioned in the magnetic circuit is an electromagnet having a soft magnetic core and a coil. The magnetic circuit has air gaps between the soft magnetic core and at least one of the clutch parts. The flux density in the magnetic circuit, and thus the contact force, is modifiable via the current applied to the coil. The magnetic flux changes at least ten flux crossover points one after the other in the direction of flow between the clutch parts. The cross section of the magnetic flux in at least one air gap is at least five times greater than the smallest flux cross section in the soft magnetic material.

Electromagnetic friction clutch

In electric machines, core losses limit, at high fundamental frequency, the permissible full-load power. The aim of the invention is to develop a design which enables a high power density at high magnetic reversal frequencies and which is easy to produce. To this end, the primary part comprises coils which, for the majority of their length, run in the direction of movement and which are surrounded in this area on three sides by soft magnetic material. In the direction of movement, at least two coils are arranged one behind the other. Coils of different phase are arranged perpendicular to the direction of movement inside different running tracks. In the secondary part, at least two oppositely magnetized hard magnets with three collector segments, which are flatly adjacent in a manner that is perpendicular to the direction of movement, form magnet poles having a high flux concentration. The primary and secondary parts can be shifted with regard to one another in a manner that is perpendicular to the direction of movement by means of a mechanism. The machine is characterized by having an easily producible modular design which has low core losses also at high frequencies. A high power density and, at the same time, a large low-loss field control area is realized in compact dimensions.

Electric machine for high magnetic reversal frequencies

A damping device for damping speed irregularities of a rotating shaft includes an armature having at least one armature part made of a non-ferromagnetic, electrically conductive material. An exciter configured to permeate the armature part in at least some regions with a magnetic flux. The armature, together with the at least one armature part, is movably supported relative to the exciter, transversely to the direction of the magnetic flux. In one region permeated by the magnetic flux in a position of normal use, the armature part has at least one opening in which a ferromagnetic flux-guide member is located.

Damping device

In a method for operating an EC motor, position-measurement signals are recorded by a position-measuring device, and, on the basis of the position-measurement signals, commutation instants are determined, at which the current supply to the EC motor is commutated. At least one correction value for at least one position-measurement error contained in the position-measurement signals is ascertained and stored. To compensate for the at least one position-measurement error, the correction value is considered when determining the commutation instants.

EC motor and method for operating same

An electronic device has at least one semiconductor chip, which has mutually opposing contact sides, of which one first contact side is electroconductively surface-bonded via a first, solid soldering-agent layer to at least one first metallic conductor part. The semiconductor chip is electroconductively surface-bonded on its second contact side facing opposite the first contact side via a second soldering-agent layer to at least one second metallic conductor part. The softening temperature of the second soldering-agent layer is adapted to an operating temperature that occurs in this soldering-agent layer during operation of the device in such a way that the second soldering-agent layer is doughy or liquid at the operating temperature. The second soldering-agent layer is laterally bounded by a flow-off protection device.

Electronic device

Electric machines operating according to the reluctance principle have toothed air gap surfaces between their moving and fixed parts. The magnetizability of these teeth directly affects the performance of the machine. According to the invention, the teeth projecting into the air gap consist of a material which in relation to the remaining soft-magnetic body presents better magnetizability and/or greater magnetic saturation flux density. This material is preferably a grain-oriented electric steel sheet or a cobalt/iron alloy. Alternatively or in addition thereto, the soft-magnetic body in which the conductor coils are positioned can be made entirely of a grain-oriented material by appropriate segmentation. In this case, every other pole is non-spooled and consists of two halves separated by a non-magnetic holding element. The use of steel sheets rolled at an angle also contributes to the improved utilization of space and material in rotating machines, especially in transverse flux machines. The characteristics of the construction provided for in the invention result in the production of little cutting waste and thus raise the performance of electric machines with soft-magnetic teeth at the air gap surface and reduce losses.

Electric machine with soft magnetic teeth

Electric machines with a radial air gap field, but in particular low power EC external rotors, have advantageously individually spooled poles. The trapezoidal cross section of the slot and small slot openings towards the air gap make the realization of a compact winding difficult. In accordance with the invention, the body of the electric machine which form the individual poles is assembled from soft magnetic segments. The segments are preferably made of axially stacked sheet metal that have indentations on the edges forming the wall of the slot. The indentations enables the conductor wire to be guided in a precise manner during winding of the individual poles. At the air gap, pole shoes cover almost the entire perimeter and at the opposite end, they form adjacent pole segments, preferably with recesses, into which retention pins are axially inserted after mounting to ensure radial fixation. In multi-phase machines, spooled T-segments and non-spooled X-segments alternate in direction of the slot width with the X-segment possessing a pole surface that is fractionally enlarged in accordance with the number of phases. The invention enables highly efficient electric drive units to be produced at low cost.

Electric machine with a single pole winding

Known turn-to-turn windings with overlapping conductor lanes either only insufficiently use the groove space or are difficult to produce. In addition, uniform distribution of current density is not achieved in the winding overhang space. The disclosed multiple phase conductor layers are made of identical conductor lanes located in the groove space at the same distance from the air gap surface. The conductor layers stacked in the grooves complement each other in the use of the winding overhang space in that they lead the current in opposite directions across the width of the groove. Uniform distribution of current density and high space utilization are achieved in that the layered winding overhangs are offset in relation to the layers in the grooves in direction of the groove depth by one half the height of a layer. Each conductor lane occupies two winding overhang layers when passing through the winding overhangs, the transition between layers taking place at about the middle of the middle of the connection section at the outside of the winding overhangs. The conductor layers once removed are connected with each other. Motors and generators equipped with space-optimized turn-to-turn windings are characterized by high efficiency and power density.

Multiple phase electric machine with a space-optimized turn-to-turn winding

The invention concerns a permanently excited transverse flux machine which requires only one permanent magnet segment per phase and per magnetic circuit. The magnetic flux generated by a permanent magnet segment (3) flows alternately through the soft magnetic body on two conductor rings (7) of this transverse flux machine. The conductor rings (7) are arranged on different sides of the permanent magnet segment, the direction of flux in the permanent magnet segments corresponding to the direction of magnetic flux in the two air gaps through which said flux passes. Preferably, the permanent magnet segments are arranged between two U-shaped halves of a square wound C-core constituting the rotor bodies (5). The stator bodies (6) are also prefabricated from grain-oriented materials as U-shaped C-cores.

Growing community of inventors

Karlsruhe, Germany

Wolfgang Hill