Abstract: A DC-to-DC converter includes a primary side of a transformer element of the DC-to-DC converter and a secondary side of the transformer element, the primary side having a first rectifier circuit and a primary-side resonant circuit and the secondary side having a second rectifier circuit and a secondary-side stored energy source, the transformer element being arranged between the primary side and the secondary side in order to transfer electrical energy, the secondary side having a secondary resonant circuit capacitor.

Abstract: The invention relates to an underwater drilling device and to a method for procuring drill cores of a bed of a body of water, wherein an underwater drilling device with a base frame is lowered in a body of water and placed on a bed of a body of water. A drill string consisting of at least one tubular drill string element is drilled out into the bed of the body of water in a first drilling step with a drill drive, with a drill core being formed in a receptacle in the tubular drill string element and being received in a core barrel in the drill string element. According to the invention, the drill core is enclosed in pressure-tight manner in a receiving container on the basic cradle under water.

Abstract: The invention relates to a trench wall cutting device comprising a trench cutter having at least one cutting frame unit and at least two cutting wheels arranged in the longitudinal direction of the cutting frame unit and is configured for cutting a substantially vertical cutting trench in the ground, a supporting structure for suspending the trench cutter in a cutting position and moving it in a substantially vertical cutting direction for creating the cutting trench, and a feed device for feeding the trench cutter in a feeding direction which is oriented transversely to the cutting direction.

Abstract: The invention relates to a trench wall cutting device, to a trench cutter having a trench wall cutting device according to the invention, and to a method for cutting a cut trench using a trench cutter, which is constructed from at least two cutter modules, and at least one supply unit, which is connected to the cutter modules by means of cables. The first cutter module can be lowered into a guide trench before the second cutter module is placed onto the first cutter module. As a result, a cut trench can be created at a location with a restricted height, wherein in the trench the cutter has a guide height that is greater than the height of the site out of which the cut trench is generated.

Abstract: A DC-to-DC converter includes a primary side of a transformer element of the DC-to-DC converter and a secondary side of the transformer element, the primary side having a first rectifier circuit and a primary-side resonant circuit and the secondary side having a second rectifier circuit and a secondary-side stored energy source, the transformer element being arranged between the primary side and the secondary side in order to transfer electrical energy, the secondary side having a secondary resonant circuit capacitor.

Abstract: The invention relates to an underwater drilling device and to a method for procuring drill cores of a bed of a body of water, wherein an underwater drilling device with a base frame is lowered in a body of water and placed on a bed of a body of water. A drill string consisting of at least one tubular drill string element is drilled out into the bed of the body of water in a first drilling step with a drill drive, with a drill core being formed in a receptacle in the tubular drill string element and being received in a core barrel in the drill string element. According to the invention, the drill core is enclosed in pressure-tight manner in a receiving container on the basic cradle under water.

Abstract: The invention relates to a ground processing tool and a method for creating a borehole in the ground, wherein ground material is removed by the ground processing tool and blended with a fluid in the created borehole to form a suspension, which is suctioned away via at least one opening in the at least one mixing blade and via the conducting channel in the central shaft.

Abstract: The disclosure relates to electrical converters. The teachings thereof may be embodied in a circuit assembly for an electrical converter. For example, a circuit assembly for an electrical converter may include a set of switching units, each switching unit comprising a semiconductor switch and a gate driver circuit for controlling the semiconductor switch. The respective semiconductor switch and gate driver circuit of each switching unit are arranged on a common carrier circuit board and are electrically connected to one another by a printed conductor on the carrier circuit board.

Abstract: The invention relates to a ground processing tool and a method for creating a borehole in the ground, wherein ground material is removed by the ground processing tool and blended with a fluid in the created borehole to form a suspension, which is suctioned away via at least one opening in the at least one mixing blade and via the conducting channel in the central shaft.

Abstract: The disclosure relates to electrical converters. The teachings thereof may be embodied in a circuit assembly for an electrical converter. For example, a circuit assembly for an electrical converter may include a set of switching units, each switching unit comprising a semiconductor switch and a gate driver circuit for controlling the semiconductor switch. The respective semiconductor switch and gate driver circuit of each switching unit are arranged on a common carrier circuit board and are electrically connected to one another by a printed conductor on the carrier circuit board.

Abstract: A battery with simultaneous active compensation of the interference signals occurring during the charging is provided. In order to charge the battery, at least two converters are used, which can control connected loads during the working operation. During the charging operation, one converter controls the charging process while the other converter performs an active compensation of the interference signals that occur.

Abstract: The invention relates to underwater drilling for procuring and analyzing ground samples of a bed of a body of water. An underwater drilling device placed onto a bed of the body of water. By a drill drive a drill rod composed of at least one tubular drill rod element is drilled into the bed of the body of water in a first drilling step, wherein a drill core is received in a receiving part in the tubular drill rod element. The receiving part with the drill core is deposited in a storage place of a storage area on the base frame. Subsequently, one further drilling step is carried out with a further drill rod element. By means of sensor means at least one physical and/or chemical property of the drill core is determined. data on the storage place of the drill core in the second storage area.

Abstract: The invention relates to underwater drilling for procuring and analyzing ground samples of a bed of a body of water. An underwater drilling device placed onto a bed of the body of water. By a drill drive a drill rod composed of at least one tubular drill rod element is drilled into the bed of the body of water in a first drilling step, wherein a drill core is received in a receiving part in the tubular drill rod element. The receiving part with the drill core is deposited in a storage place of a storage area on the base frame. Subsequently, one further drilling step is carried out with a further drill rod element. By means of sensor means at least one physical and/or chemical property of the drill core is determined. data on the storage place of the drill core in the second storage area.

Abstract: The invention relates to a method for anchoring a structure in a bed of a body of water comprising the method steps of introducing at least one screw anchor into the bed of the body of water, arranging and fastening a base element on the fastening section of the screw anchor, wherein the base element has a holder for the structure, and arranging and fastening the structure on the holder of the base element. Furthermore, the invention relates to an underwater foundation produced by this method.

Abstract: The invention relates to a maritime supply line with at least two line elements which respectively comprise a jacket pipe, at least two inner lines which are arranged in the jacket pipe and a connecting element arranged at least at one end of the line element for the formation of a watertight connection to a line element to be connected. It is provided according to the invention that the connecting element comprises a connecting flange with a radially projecting collar, on which a radially projecting collar of a connecting flange of the line element to be connected can be placed. For the formation of the watertight connection the two radially projecting collars are incorporated by at least one tensioning clamp and are axially tensioned against each other.

Abstract: The invention relates to a method and to a device for creating a foundation element in the ground, wherein ground material is removed by means of a drilling tool and a borehole is created, into which a pile pipe and a curable medium are introduced. The borehole is created having a boring diameter that is greater than an outside diameter of the pile pipe by a specified amount, wherein an annular space is formed between a borehole wall and an outer face of the pile pipe. The removed ground material is conveyed in an interior of the pile pipe, while the annular space is kept substantially free of removed ground material. The curable medium is introduced into the annular space in order to anchor the pile pipe in the ground.

Abstract: A capacitor module having a capacitor and a heater is disclosed. The temperature of the capacitor can be measured by means of a temperature sensor and the temperature of the capacitor is influenced by the heater. The capacitance value changes as a function of the temperature. Thus a circuit apparatus having a resonance converter can be tuned thereby, since the capacitance value can be regulated or controlled.

Abstract: A boring apparatus for producing a bore within a support tube in the ground. The boring apparatus comprises a housing which is introducible into the support tube and is non-rotatably fixable to the support tube, a cutting device for removing ground material, a rotary drive for driving the cutting device in rotation and a feeding device, by way of which a flushing fluid can be fed into a region of the cutting device. Arranged above the cutting device is a receptacle, into which removed ground material is deliverable by way of the flushing fluid. Provided in the receptacle is at least one stirring element for mixing the removed ground material with the flushing fluid. The removed ground material is upwardly dischargeable out of the receptacle together with the flushing fluid by means of a discharging device. The invention also relates to a method for producing a bore in the ground.

Abstract: A battery with simultaneous active compensation of the interference signals occurring during the charging is provided. In order to charge the battery, at least two converters are used, which can control connected loads during the working operation. During the charging operation, one converter controls the charging process while the other converter performs an active compensation of the interference signals that occur.

Abstract: An underwater drilling arrangement for marking a bore in a bed of a lake, sea or river with a service platform which can be lowered for placing on the lake, sea or river bed, a drill drive which is mounted so that it is axially displaceable on the service platform, and a drill rod with drill head which can be driven in rotation via the drill drive. A conveying channel is formed in the drill rod, through which a conveying fluid together with excavated drill cuttings can be conveyed upwards, and a discharge opening for the conveying fluid together with the excavated drill cuttings is provided, via which the conveying fluid can be discharged underwater together with the excavated drill cuttings above the drill drive.