Abstract: The disclosure relates to a polyphase transverse flux machine including a stator and a rotor configured to rotate relative to the stator about an axis in a circumferential direction. The transverse flux machine includes an electrical line running along a plurality of yokes in the circumferential direction, and a pair of permanent magnet arrays running in parallel in the circumferential direction. A plurality of return path bodies is provided in the stator, wherein each yoke has an associated return path body at a distance from the associated yoke in the radial direction. The magnetization direction of the permanent magnets in the permanent magnet arrays changes in such a way that a closed magnetic flux repeatedly occurs at each yoke during rotation of the rotor. The closed magnetic flux runs from one permanent magnet array across a respective yoke to the other permanent magnet array, and from there, across the associated return path body, back to the first-mentioned permanent magnet array.

Abstract: The disclosure relates to a polyphase transverse flux machine including a stator and a rotor configured to rotate relative to the stator about an axis in a circumferential direction. The transverse flux machine includes an electrical line running along a plurality of yokes in the circumferential direction, and a pair of permanent magnet arrays running in parallel in the circumferential direction. A plurality of return path bodies is provided in the stator, wherein each yoke has an associated return path body at a distance from the associated yoke in the radial direction. The magnetization direction of the permanent magnets in the permanent magnet arrays changes in such a way that a closed magnetic flux repeatedly occurs at each yoke during rotation of the rotor. The closed magnetic flux runs from one permanent magnet array across a respective yoke to the other permanent magnet array, and from there, across the associated return path body, back to the first-mentioned permanent magnet array.

Abstract: An apparatus for controlling and regulating a movement of a system includes a load calculating device calculating continuously during the movement of the system a respective force vector for each of the individual elements as a function of predetermined reference coordinates and a torque calculating device calculating continuously during the movement at least one compensating variable, wherein the compensating variable compensates the force vectors as a function of the reference coordinates and the force vectors. The apparatus for controlling and regulating has a control unit controlling continuously during the movement a force-producing variable for the at least one drive as a function of the reference and the at least one compensating variable.

Abstract: An internal combustion engine includes a piston oscillating in a cylinder linearly between a top dead centre and a bottom dead centre. A crankshaft driven by the piston via a connecting rod is connected to the rotor of a first electrical machine. The rotor co-operates electromagnetically with a stator of the first electrical machine. The stator is connected to a first current converter unit for bidirectional transmission of electrical energy. The rotor of a second electrical machine is disposed on the piston. The stator of the second electrical machine is disposed on the piston. The rotor of the second electrical machine co-operates electromagnetically with the stator of the second electrical machine. The stator of the second electrical machine is connected to a second current converter unit for unidirectional or bidirectional transmission of electrical energy. The current converter units are controlled by a control device common to the current converter units.

Abstract: The invention relates to a drive (1) of a tail rotor (12) of a helicopter (10) by a permanently excited transversal flux machine in duplex arrangement in such a way that between two stators (4), which each have a toroidal winding system (8), there is arranged a disc-shaped impeller (5), which has permanent magnets (15) and on the outer circumference of which propeller blades (14) of the tail rotor (12) are arranged.

Abstract: An internal combustion engine includes a piston oscillating in a cylinder linearly between a top dead centre and a bottom dead centre. A crankshaft driven by the piston via a connecting rod is connected to the rotor of a first electrical machine. The rotor co-operates electromagnetically with a stator of the first electrical machine. The stator is connected to a first current converter unit for bidirectional transmission of electrical energy. The rotor of a second electrical machine is disposed on the piston. The stator of the second electrical machine is disposed on the piston. The rotor of the second electrical machine co-operates electromagnetically with the stator of the second electrical machine. The stator of the second electrical machine is connected to a second current converter unit for unidirectional or bidirectional transmission of electrical energy. The current converter units are controlled by a control device common to the current converter units.

Abstract: An apparatus for controlling and regulating a movement of a system includes a load calculating device calculating continuously during the movement of the system a respective force vector for each of the individual elements as a function of predetermined reference coordinates and a torque calculating device calculating continuously during the movement at least one compensating variable, wherein the compensating variable compensates the force vectors as a function of the reference coordinates and the force vectors. The apparatus for controlling and regulating has a control unit controlling continuously during the movement a force-producing variable for the at least one drive as a function of the reference and the at least one compensating variable.

Abstract: In a method for manufacturing a gearwheel, a gearwheel blank is clamped in a workholder of a multi-axis machine tool. A milling head is clamped in a tool holder which is rotated by a spindle drive to enable the milling head to mill out tooth spaces of the gearwheel blank to thereby create a gearwheel having teeth. After replacing the milling head in the tool holder with an inductor, the inductor is inserted successively between two adjacent teeth of the gearwheel and supplied with alternating current from a current supply device of the spindle drive to inductively heat at least one of the two adjacent teeth. The inductor in the tool holder is then replaced with a machining tool to remachine the teeth of the gearwheel.

Abstract: An aircraft includes a propeller and an electric motor which is constructed in the form of a drive for the propeller. The electric motor includes at least two air gaps that can be used for cooling. The air gaps define an axis of symmetry which corresponds to an axis of rotation of the propeller.

Abstract: The invention relates to an electric drive (1) for an aircraft, especially for a helicopter (20) comprising at least one rotor (23) that is directly driven by a dynamoelectric machine (2). The dynamoelectric machine (2) is embodied in a duplex arrangement, a rotor (6) arranged in an air gap (12) comprising permanent magnets (13) on a carrier device (14), and the stators (4, 5) of the dynamoelectric machine (2) and/or the rotor (6) comprising coolant. A planetary gear (3) is especially provided between the driven rotor and the dynamoelectric machine (2), preferably in the axial extension of the dynamoelectric machine (2).

Abstract: The invention relates to a drive (1) of a tail rotor (12) of a helicopter (10) by a permanently excited transversal flux machine in duplex arrangement in such a way that between two stators (4), which each have a toroidal winding system (8), there is arranged a disc-shaped impeller (5), which has permanent magnets (15) and on the outer circumference of which propeller blades (14) of the tail rotor (12) are arranged.

Abstract: The invention relates to a method of reducing vibrations, occurring during a machining operation, of a machine element (7,8) and/or of a workpiece (5) in a machine tool, production machine and/or in a machine (1) designed as a robot, wherein an additional mass (9a, 9b, 9c) is attached to the machine element (7,8) and/or to the workpiece (5) in an automated manner, wherein the mass of the additional mass (9a, 9b, 9c) is adapted to the machining operation. Furthermore, the invention relates to a machine (1) in this respect. The invention enables vibrations, occurring during a machining operation, of a machine element (7,8) of a machine (1) and/or of a workpiece (5) to be reduced.

Abstract: A drive arrangement with a first motor and a second motor is described, the first and second motor being coupled via a first coupling unit. The first motor is provided to generate uniform low-frequency movements and the second motor performs a higher frequency alternating movement to be overlapped. The total movement is transmitted from the second motor to a machine component coupled via a second coupling unit. The first coupling unit is configured to transfer the uniform low-frequency movement of the first motor to the second motor, wherein a transmission of the higher frequency alternating movement of the second motor to the first motor is suppressed.

Abstract: A drive apparatus with at least one synchronous motor, a converter and a mechanical energy buffer able to be fed from an energy supply network, which, for converting mechanical energy into electrical current, includes a first asynchronous machine, and a method of operation for such a drive apparatus are specified, with which or in which the energy buffer, especially its first asynchronous machine is directly electrically connected via a switchover device to the at least one synchronous motor, so that the converter included in the drive apparatus is bypassed for such a switch position of the switchover device and the converter accordingly does not have to be designed for currents which flow in such a switch position of the switchover device.

Abstract: The invention relates to a method for guiding the displacement of a displaceable machine element (18) in a machine, comprising the following steps: a) specification of a guide target variable (xtarg) that describes the desired displacement operation of the machine element (18); b) determination of a pilot actual variable (Mpilot) and/or a guide actual variable (xact) from the guide target variable (xtarg) using a model (2), said model (2) comprising a path model (3), which simulates the dynamic behaviour of the elements (16, 18) involved in the displacement. The invention also relates to a device that corresponds to the method. The invention permits the optimised guidance of the displacement of a displaceable machine element (18) in a machine.

Abstract: The invention relates to a guiding device (3) for guiding a displaceable machine element (1) of a machine. Said guiding device (3) in connected in a mechanically fixed manner to a machine bed (4). A material measure (6) is arranged along at least one part of the guiding device (3) in order to determine a position of the machine element (1). The guiding device (3) and the material measure (6) can be displaced in relation to each other and at least one part of the material measure (6) is in contact with the guiding device (3) either directly or via a bearing (9). The inventive guiding device (3) enables the displaceable machine elements to be positioned in a precise manner even when the machine bed (4) is vibrated. The invention also relates to a machine comprising said type of guiding device (3).

Abstract: According to the invention, an X-ray examination may be simply and rapidly carried out and hence produce a sharp X-ray image with an X-ray source and/or X-ray receiver an X-ray examination system which may be displaced relative to the mounting position thereof by means of an actuator, despite a system construction which may be caused to oscillate at a resonant frequency dependent on the corresponding mounting position, about the mounting position, whereby according to the inventive method, at least one parameter relevant to the resonant frequency, dependent on the corresponding mounting position, is determined, a set guided movement, counteracting the cause of oscillation in order to achieve a movement condition for the X-ray source or X-ray receiver necessary for the X-ray examination, is determined depending on the at least one corresponding parameter and the guided movement of the X-ray source and/or X-ray receiver controlled using the actuator according to the set guided movement.

Abstract: A system for guiding movement of a movable machine element of a machine, such as a machine tool, production machine and robot, receives user input data relating to a travel movement of machine element and an optimization criterion selected from a robust travel movement, where a smallest number of natural frequencies of the movable machine element is excited, and a time-optimized travel movement, where from the natural frequencies of the movable machine element only those natural frequencies are excited that do not include a main natural frequency. The system then determines from the movement profile coefficients of polynomial functions and a position setpoint variable based on the coefficients. The travel movement of the machine element is executed in response to the determined position setpoint variable.

Abstract: The invention relates to a method of reducing vibrations, occurring during a machining operation, of a machine element (7,8) and/or of a workpiece (5) in a machine tool, production machine and/or in a machine (1) designed as a robot, wherein an additional mass (9a, 9b, 9c) is attached to the machine element (7,8) and/or to the workpiece (5) in an automated manner, wherein the mass of the additional mass (9a, 9b, 9c) is adapted to the machining operation. Furthermore, the invention relates to a machine (1) in this respect. The invention enables vibrations, occurring during a machining operation, of a machine element (7,8) of a machine (1) and/or of a workpiece (5) to be reduced.

Abstract: The invention relates to a drive system comprising a control unit (1), which is connected to drive units (3a, 3b, 3c, 3d, 3e, 3f, 3g) via a data bus (2) for the exchange of data. According to the invention, one drive unit (3a, 3b) is connected to the drive motor (7a, 7b) in order to control the latter (7a, 7b) and an additional drive unit (3c, 3d, 3e, 3f, 3g) is connected to a magnetic bearing (11c, 11d, 11e, 11f, 11g) of a magnetic spindle bearing arrangement (23) in order to control said bearing (11c, 11d, 11e, 11f, 11g). The invention thus provides a drive system, in which a magnetic spindle bearing arrangement (23) is integrated.