Abstract: A passive oscillation damper (8), in particular for a switch cabinet (2), includes a supporting structure (12) having a longitudinal direction (y) and a transverse direction (x) and with a central oscillating mass (14) mounted by means of spring elements (20, 22, 24, 26) so as to be able to oscillate in the longitudinal direction (y) and in the transverse direction (x). At least one peripheral oscillating mass (40, 42) is mounted on the central oscillating mass (14) so as to be slidable in the longitudinal direction (y) and to be movable relative to the central oscillating mass (14). At least one peripheral oscillating mass (44, 46) is mounted on the central oscillating mass (14) so as to be slidable in the transverse direction (x) and to be movable relative to central oscillating mass (14).

Abstract: The invention relates to a device and a method for insulation monitoring including identification of a faulty outer conductor in a three-phase ungrounded power supply system. The fundamental idea of the present invention rests upon determining the phase angle between the measured mains voltage and the measured neutral-point voltage when presuming only one measurement of the mains voltage to ground at one of the outer conductors and one measurement of the neutral-point voltage to ground. The value of the thus determined phase angle is in one of three angle ranges which each extend over 120 degrees and are to be assigned to one of the three outer conductors so that the faulty outer conductor is determined. The faulty outer conductor is thus detected by measuring only one mains voltage in conjunction with the measurement of the neutral-point voltage by evaluating the phase between the two measured voltage.

Abstract: The invention relates to circuit arrangements for reducing potential-induced degradation in photovoltaic modules of a photovoltaic generator, said circuit arrangements comprising an insulation monitoring device for a temporally continuous insulation monitoring of the photovoltaic generator. Furthermore, the invention relates to a photovoltaic system comprising a circuit arrangement for reducing potential-induced degradation in photovoltaic modules, said photovoltaic system comprising a photovoltaic generator and an insulation monitoring device for a temporally continuous insulation monitoring of the photovoltaic generator. Different solutions are proposed which enable reducing potential-induced degradation while simultaneously continuously monitoring insulations. The circuit arrangements according to the invention rest upon an insulation monitoring device interacting with measures based circuit technology for influencing potentials in a photovoltaic module.

Abstract: A passive oscillation damper (8), in particular for a switch cabinet (2), includes a supporting structure (12) having a longitudinal direction (y) and a transverse direction (x) and with a central oscillating mass (14) mounted by means of spring elements (20, 22, 24, 26) so as to be able to oscillate in the longitudinal direction (y) and in the transverse direction (x). At least one peripheral oscillating mass (40, 42) is mounted on the central oscillating mass (14) so as to be slidable in the longitudinal direction (y) and to be movable relative to the central oscillating mass (14). At least one peripheral oscillating mass (44, 46) is mounted on the central oscillating mass (14) so as to be slidable in the transverse direction (x) and to be movable relative to central oscillating mass (14).

Abstract: The invention relates to a device and a method for insulation monitoring including identification of a faulty outer conductor in a three-phase ungrounded power supply system. The fundamental idea of the present invention rests upon determining the phase angle between the measured mains voltage and the measured neutral-point voltage when presuming only one measurement of the mains voltage to ground at one of the outer conductors and one measurement of the neutral-point voltage to ground. The value of the thus determined phase angle is in one of three angle ranges which each extend over 120 degrees and are to be assigned to one of the three outer conductors so that the faulty outer conductor is determined. The faulty outer conductor is thus detected by measuring only one mains voltage in conjunction with the measurement of the neutral-point voltage by evaluating the phase between the two measured voltage.

Abstract: The invention relates to circuit arrangements for reducing potential-induced degradation in photovoltaic modules of a photovoltaic generator, said circuit arrangements comprising an insulation monitoring device for a temporally continuous insulation monitoring of the photovoltaic generator. Furthermore, the invention relates to a photovoltaic system comprising a circuit arrangement for reducing potential-induced degradation in photovoltaic modules, said photovoltaic system comprising a photovoltaic generator and an insulation monitoring device for a temporally continuous insulation monitoring of the photovoltaic generator. Different solutions are proposed which enable reducing potential-induced degradation while simultaneously continuously monitoring insulations. The circuit arrangements according to the invention rest upon an insulation monitoring device interacting with measures based circuit technology for influencing potentials in a photovoltaic module.

Abstract: A device for ultrasonic machining includes a sonotrode for machining material. Further, the device for ultrasonic machining includes an armature for connecting the device to a machine tool in a releasably magnetic manner. In an embodiment, the device further includes a transducer which is connectable to a power supply at the machine tool to receive electrical energy and is connected to the sonotrode for introducing mechanical vibrations into the sonotrode.

Abstract: The present invention provides a machine tool, comprising a permanent-magnet motor having a rotating-field, wherein a sonotrode for machining material is rotatable by means of the permanent magnet motor.

Abstract: The present inventions provides a device for ultrasonic machining, comprising: a sonotrode for machining material; and an armature for connecting the device to a machine tool in a releasably magnetic manner.

Abstract: For introducing a weakened line into a component 10, which is rigid per se and does not conform to a supporting mold or a receiving means in correspondence with the true shape, especially into an injection-molded part such as an instrument panel of an automobile, a device is provided comprising a multi-axis machine tool with a CNC-control suited for processing base-oriented programs, and a receiving means 11 for the component 10 to be processed, distance sensors 13 for the CNC-control being assigned to the receiving means to detect the actual three-dimensional position of the component.

Abstract: In a method for producing a double-walled plastics material moulded part from portions of lengths of plastics material including at least one inserted component utilizing a closable housing of a thermoforming or vacuum moulding machine, upper and lower portions of a length of material are inserted into the opened housing between an upper and a lower housing portion by means of upper and lower conveying devices. The upper and lower portions are held apart via a twin-sheet frame. To seal the portions of length of material and the twin-sheet frame and simultaneously to hold the portions of the length of material with a slight excess pressure during heating prior to producing deformed upper and lower portions of the length of material, the upper portion of the length of material is pressed onto the twin-sheet frame in a region above it by a movable clamping frame and simultaneously the lower portion of the length of material is pressed against the lower housing portion to create a closed chamber.

Abstract: For introducing a weakened line into a component 10, which is rigid per se and does not conform to a supporting mold or a receiving means in correspondence with the true shape, especially into an injection-molded part such as an instrument panel of an automobile, a device is provided comprising a multi-axis machine tool with a CNC-control suited for processing base-oriented programs, and a receiving means 11 for the component 10 to be processed, distance sensors 13 for the CNC-control being assigned to the receiving means to detect the actual three-dimensional position of the component.

Abstract: An apparatus for machining a formed thermoplastic plate for detaching at least one molded part comprises a multi-axis machining device having at least one machining tool and a machining table for a formed thermoplastic plate. The formed thermoplastic plate comprises at least one molded part to be machined and the machining table comprises a suction device for securely receiving the formed thermoplastic plate and for simultaneously removing chips generated during machining of the thermoplastic plate.

Abstract: A vacuum forming machine and a method of manufacturing a duplex twin-sheet element from two continuous webs of thermoplastic material conveyed in parallel by means of a twin-sheet frame provided therebetween, which is adapted to be loaded by means of a tensioning frame for creating closed machine chambers with the material web sections to be shaped, provides for the aspect that the twin-sheet frame is provided with a front frame section in the front along the conveying direction of said material webs, which frame section can be removed for de-moulding said twin-sheet element. The material webs are conveyed in a cycled operation when the twin-sheet frame is not loaded and open in the conveying direction, and for forming a twin-sheet element, the twin-sheet frame is closed and loaded by the tensioning frame.

Abstract: For fabricating a hollow body 40 containing at least one insert 33 from two thermoplastic blanks 11, 12 by means of vacuum forming or thermoforming the thermoplastic blanks 11, 12 are fed into one single closable machine housing and are separately and simultaneously formed to formed parts in the machine housing, whereafter at least one insert 33 in inserted into a formed part 12? and fixed in the same, the formed parts are joined and bonded in a pressing contact, whereafter the finished hollow body 40 with the integrated insert 33 is withdrawn upon opening the machine housing. To this end, the device 10 comprises two forming stations 14 and 15 with respective devices for moving the form tool 30, 31, for clamping and heating a thermoplastic blank and for arranging and affixing the at least one insert 33 in a formed part 12?, wherein the formed part 12? with the insert 33 affixed therein can be moved by the mover 32 of the associated form tool 31 to contact the other formed part 11? and to bond it therewith.

Abstract: A vacuum forming machine and a method of manufacturing a duplex twin-sheet element from two continuous webs of thermoplastic material conveyed in parallel by means of a twin-sheet frame provided therebetween, which is adapted to be loaded by means of a tensioning frame for creating closed machine chambers with the material web sections to be shaped, provides for the aspect that the twin-sheet frame is provided with a front frame section in the front along the conveying direction of said material webs, which frame section can be removed for de-moulding said twin-sheet element. The material webs are conveyed in a cycled operation when the twin-sheet frame is not loaded and open in the conveying direction, and for forming a twin-sheet element, the twin-sheet frame is closed and loaded by the tensioning frame.

Abstract: A heatable pipette apparatus, includes a pipette tube having a first zone and second zone. The first zone includes a tip end and a first heater for heating the first zone. The second zone includes a second heater for heating the second zone. Regulators are provided for separately regulating the temperature of the first heater and the second heater, the first heater being able to more accurately and precisely alter the temperature of fluids in the tube to reach a predetermined temperature.