Abstract: In a method for synchronizing a feed voltage with a network voltage of an electrical energy supply network, a property of the feed voltage can be determined on the basis of a static characteristic curve. The static characteristic curve is compared to the property of the feed voltage of a feed power received by the electrical energy supply network at the applied feed voltage. The property of the feed voltage is adjusted to a specified value when a limit current of the feed power is reached.

Abstract: A combustor for a gas turbine is provided. The combustor includes a pre-combustion chamber having a center axis and a swirler which is mounted to the pre-combustion chamber. The swirler surrounds the pre-combustion chamber in a circumferential direction with respect to the center axis. The swirler has a bottom surface which forms a part of a slot through which oxidant/fuel mixture is injectable into the pre-combustion chamber, wherein the bottom surface is located in a bottom plane. The swirler further includes a fuel injector which is arranged to the bottom surface such that a fuel is injectable into the slot with a fuel injection direction, wherein a first component of the fuel injection direction is non-parallel to the normal (n) of the bottom plane.

Abstract: A diffuser of a thermal energy machine, in particular of a gas turbine, has a diffuser inlet, a diffuser outlet, and a plurality of air-guiding elements, wherein an air mass flow enters the diffuser through the diffuser inlet, and wherein the air mass flow that has entered the diffuser exits the diffuser through the diffuser outlet and flows off as a plurality of partial air mass flows by the air-guiding elements. At least two immediately adjacent air-guiding elements of the plurality of air-guiding elements are designed in such a way that the flow-off angles thereof with respect to the circumferential surface formed by the outlet opening of the diffuser outlet extending circumferentially in the circumferential direction differ from each other.

Abstract: A steam turbine having an inflow ring channel which is connected to an inflow connecting piece in terms of flow technology. The inflow connecting piece is designed in such a way that an incoming flow is first slowed down, subsequently accelerated and simultaneously deflected.

Abstract: A method for cooling down a gas turbine, wherein the gas turbine is run down from the power operation thereof to cool-down operation, and wherein a liquid is sprayed into air sucked in by a compressor of the gas turbine during the cool-down operation, and wherein the liquid is sprayed into the sucked-in air in dependence on a humidity of the sucked-in air, a flow velocity of cooling air flowing in the gas turbine in the region of at least one flow-guiding component of the gas turbine, which component is to be cooled, and a temperature difference between a temperature of the sucked-in air and a temperature of the at least one flow-guiding component of the gas turbine.

Abstract: A method of manufacturing of a component having the steps of manufacturing of a first segment for the component by a powder-bed manufacturing process, and the manufacturing of a second segment for the component originating from the first segment by an additive manufacturing process, such that the second segment projects by a projecting distance over at least one side face of the first segment. Furthermore, a component has the first segment being manufactured by the powder-bed manufacturing process and the second segment being manufactured by the additive manufacturing process, wherein the second segment projects by a projecting distance over at least one side face of the first segment.

Abstract: To populate printed circuit boards by means of a pickrand-place line, multiple set-ups, each having an associated set-up family, are formed. A number of component types is associated with each set-up and a number of printed circuit board types is associated with each associated setup family, such that a printed circuit board of a printed circuit board type in a set-up family can be populated on the pick-and-place line using components of the component types associated with the set-up. A setting-up table comprising a stock of components of a component type in a set-up can be provided on the pick-and-place line. A method for populating the printed circuit boards includes the steps of recording printed circuit board types, from which printed circuit boards are to be populated with components of associated component types, and associating recorded printed circuit board types with set-up families.

Abstract: A crane system having a gas turbine that has a manhole on the outer housing thereof, the manhole being designed to open up a maintenance access to hot gas parts of the gas turbine in the open state of the manhole, which is provided with a fastening section; the crane system further has a hoisting mechanism that includes a mating fastening section which is connected to the fastening section of the manhole in such a way that the hoisting mechanism introduces weights that same has to lift into the outer housing of the gas turbine.

Abstract: A method for creating an impeller and an impeller of a radial turbo fluid energy machine includes a wheel disc, cover disc, blades, and hub. The hub is mounted on a shaft which extends along an axis, the wheel disc extends substantially radially from the hub, and the cover disc is connected to the wheel disc by the blades such that flow channels separated from one another in the circumferential direction are defined by the blades. The impeller has a first flow passage in a substantially axial direction in the radial proximity of the hub, and the impeller has a second flow passage in a substantially radial direction radially farther away from the hub than the first flow path passage. The cover disc surface facing the wheel disc has a lower degree of roughness at least in some regions than the wheel disc surface facing the cover disc.

Abstract: For presenting structure information about a technical object, an apparatus having an identification module for identifying the technical object, a modeling module, an image generation module and having a projection module is provided. The modeling module provides a structure model of the identified technical object and also to specifically ascertain, an outwardly recognizable object structure for the technical object and a piece of inner structure information, associated with the object structure, about the technical object on the basis of the structure model. The image generation module is used to produce a structure image of the technical object, to insert the object structure into the structure image and to insert the structure information into the structure image with the object structure so that it differs from the manner of presentation of the object structure. The projection module is used to project the structure image onto the technical object.

Abstract: A method is provided for operating a vehicle having a drive unit, a driving-data determination unit, a consumer set, and a power management unit for managing the consumer set. The driving-data determination unit identifies or determines driving curve data and the drive unit is controlled on the basis of the driving curve data. The method achieves an optimization with regard to a defined quality criterion while also taking the consumer set into account, in that the power management unit receives consumer data from the consumer set, the power management unit determines anticipatory load profile data at least on the basis of the consumer data, determination or identification data are transmitted to the driving-data determination unit in accordance with the load profile data, and the driving-data determination unit determines or identifies the driving curve data in accordance with the determination data.

Abstract: A method for operating a turbine unit having at least two partial turbines, wherein a steam volumetric flow is conducted by a steam transfer device from the partial turbine arranged upstream to a partial turbine arranged downstream, which is connected after the partial turbine arranged upstream, wherein a pressure level within the steam transfer device is manipulated in accordance with a load range in which the turbine unit is operated, in such a way that the exhaust steam of the partial turbine arranged upstream remains superheated in the event of operation of the turbine unit in a partial-load range below the IGV point and/or in the event of a quick increase in the partial load.

Abstract: A hollow blade body for a hollow blade, has a blade wall which has a pressure side which has at least one first blade connection element on the inner side thereof, and a suction side which has at least one second blade connection element diametrically opposite to the first blade connection element on the inner side thereof, wherein the first blade connection element can be engaged with at least one first rib connection element which is arranged on a first longitudinal end of an insertion rib, and the second blade connection element can be engaged with at least one second rib connection element which is arranged on a second longitudinal end of the insertion rib facing away from the first longitudinal end in such a way that the insertion rib is fixed on the hollow blade body and effects a stiffening of the hollow blade.

Abstract: An electric motor comprising a rotor which has a plurality of permanent magnets arranged along a circumferential direction, a stator arrangement with a winding arrangement which surrounds, at least in parts, the permanent magnets. Said stator arrangement comprises a first stator having a plurality of windings and the stator arrangement comprises a second stator, the windings of the first and second stators being embodied, respectively as frame-shaped coils, said coils of the first stator being arranged in the radial direction on the outside of the permanent magnets, the coils of the second stator being arranged in the radial direction inside the permanent magnets, and the coils are arranged along the winding axis thereof in the radial direction and the permanent magnets are arranged along the magnetization direction thereof in the radial direction.

Abstract: The embodiments relate to a method and a digital circuit area for securely providing a key using a request unit and a provision unit. In this case, a key is derived from parameters, at least one of which is used for the key derivation in a non-predefinable manner by the request unit. In this case, the key derivation is carried out in a digital circuit area in which the request unit and the provision unit are implemented.

Abstract: For operating multi-axis drive assemblies more reliably even in a field weakening range, a current conversion device is proposed which includes a voltage-source DC link, a plurality of inverters having each a DC input side connected to the voltage-source DC link and AC output-side terminals for connection to an electric motor, and a control device configured to short-circuit each of the inverters. A measurement device measures an electrical variable at each of the inverters. The control device determines based on the measured electrical variables independently for each of the inverters directly or indirectly whether a particular inverter is feeding energy into the voltage-source DC link, and short-circuits, when this is the case, the particular inverter independently of the other inverters. A corresponding operating method is also disclosed.

Abstract: A method for switching an operating current in a meshed DC voltage network enables operating currents in a DC voltage network to be switched economically in both directions. At least one converter connected to the DC voltage network is controlled in such a way that a zero current is generated in a switching branch having a mechanical switch and the mechanical switch is actuated in accordance with the generated zero current.

Abstract: An assembly for nucleic acid sequencing by tunnel current analysis has at least two electrically conductive particles having a diameter from 1 nm to 100 nm and at least two electrically insulating particles having a diameter from 1 nm to 100 nm. The particles are in particular spherically shaped. The assembly also has at least two first electrodes for contacting the electrically conductive particles and a substrate on which the first electrodes and the particles are arranged. The four particles are arranged substantially in a planar square. The conductive particles lie diagonally opposite each other, and the insulating particles lie diagonally opposite each other. The gap between the four particles is used as a solid-state nanopore for nucleic acid sequencing.

Abstract: The embodiments relate to an angiographic examination method for generating a 2D projection image. The method includes: (1) acquiring a volume dataset, (2) reconstructing a 3D volume from the volume dataset, (3) forward-projecting for generating a virtual vessel projection, (4) deriving a binary vessel mask, (5) acquiring at least one current 2D projection image, (6) combining the binary vessel mask with the at least one current 2D projection image to form a current mask, (7) thresholding the current mask to form a current binary mask, (8) back-projecting the current binary mask into the 3D volume to form a mask volume, (9) threshold value segmenting the mask volume in order to generate a final virtual vessel volume, and (10) subtracting a projection of the vessel volume from the current 2D projection images to generate a selective, overlay-free visualization of the body region of interest by selectable parameters.

Abstract: A connector part of a connector unit with a male part and a female part, has at least one electrically conductive layer with at least one end region being electrically stressed after a mating process of the male part and the female part. To minimize electrical stress concentrations, the connector part has at least one stress control device for reducing electrical stress at the at least one end region.