Abstract: To the end of providing a constant AC voltage to a variable load (1) which is arranged remote of a voltage source (3), a voltage drop over an electrical supply line (2) which connects the load to the voltage source (3) is compensated for by a compensation AC voltage which, if added to the constant AC voltage, results into the output AC voltage Ufull of the voltage source (3) and the value of which is varied depending on the absolute value of the alternating current (I) conducted to the load (1) and on the phase angle phi between the output AC voltage Ufull of the voltage source (3) and the alternating current (I).

Abstract: A wind power station comprises a wind rotor; a transmission mechanically coupled to the wind rotor; an asynchronous generator having a generator rotor mechanically coupled to the transmission, and a generator stator electrically coupled to a power grid; and a protection unit protecting the generator and the transmission against accidental breakdowns of an alternating voltage provided by the power grid. The Protection unit includes at least one choke electrically arranged between the power grid and the generator stator, and a synchronous electrical machine electrically coupled to the choke.

Abstract: To the end of providing a constant AC voltage to a variable load (1) which is arranged remote of a voltage source (3), a voltage drop over an electrical supply line (2) which connects the load to the voltage source (3) is compensated for by a compensation AC voltage which, if added to the constant AC voltage, results into the output AC voltage Ufull of the voltage source (3) and the value of which is varied depending on the absolute value of the alternating current (I) conducted to the load (1) and on the phase angle phi between the output AC voltage Ufull of the voltage source (3) and the alternating current (I).

Abstract: An uninterruptible power supply system (UPS) includes a coupling choke (5) being operably arranged between an electrical load (2) and an external source of power (4). A generator (8) is operably connected to the coupling choke (5) on the side of the electrical load (2), and it is designed and arranged to be active during normal conditions and during trouble conditions. Trouble conditions are to be understood as conditions when the external source of power (4) fails. A converter (9) is operably connected to the coupling choke (5). A substitute storage device for electrical energy is operably connected to the coupling choke (5) on the side of the electrical load (2) by the converter (9). A fast-opening switch (6) is operably connected the coupling choke (5) on the side of the source of power (4), and it is designed and arranged to open in case of occurring trouble conditions.

Abstract: An apparatus for uninterruptedly supplying power includes an electrical machine including a rotor and being designed and arranged to be connected to a load to be supplied with alternating current. Coupling units include a differential transmission including three input/output shafts. A flywheel is designed and arranged to store kinetic energy and to be connected to the rotor by the coupling units. Control units include a controllable brake and at least one electrical auxiliary machine to be operated as a motor. The electrical auxiliary machine and the controllable brake engage the third input/output shaft. The control units keep the number of rotations of the electrical machine approximately constant when the electrical machine is operated as a generator by kinetic energy being stored in the flywheel.

Abstract: An uninterruptible power supply (UPS) system (3) is to be inserted between a alternating current (AC) power supply (4), interruptions of which are to be compensated for, and at least one load (5), which is to be supplied with alternating current (AC) or direct current (DC).

Abstract: In order to improve upon a take-up device for a line comprising a frame on which a take-up drum for the line is mounted so as to be rotatable about an axis, and a rotary coupling between a line terminal fixed to the frame and a line terminal fixed to the take-up drum, in such manner that as reliable as possible a rotary coupling is provided, it is proposed that the rotary coupling comprises a first auxiliary drum which co-rotates with the take-up drum and a second auxiliary drum which is fixed relative to the frame, that the rotary coupling comprises a rotating element which is rotatable about the rotation axis at a lower speed than the first auxiliary drum, and that the rotary coupling comprises a connection line which can be wound onto or unwound from the first auxiliary drum, passes from the first auxiliary drum to the rotating element in a first strand and passes from the rotating element to the second auxiliary drum in a second strand, and can be unwound from or wound onto said second auxiliary drum.

Abstract: In order to provide a system for stabilizing a power supply system comprising a choke, which connects the power supply system to a mains power feed, a converter system connected to the power supply system and having a converter machine with a rotor and at least one three-phase winding, which is in a position to stabilize the voltage in the power supply system to a specific value it is suggested that the converter system comprise a flywheel storage means with a synchronous machine and a flywheel coupled thereto, that the converter system have a static converter system, with which the flywheel storage means can be coupled to the converter machine such that the flywheel storage means can draw power from the converter machine or supply power to it, and that a control be provided which detects the voltage of the power supply system and controls the static converter system such that the converter machine stabilizes the voltage of the power supply system to a predeterminable value by drawing or supplying power.

Abstract: For expanding highly pressurized natural gas, use is made of a turbo generator (13) having a heat exchanger (12) connected at its upstream side. Heat supply to the heat exchanger (12) is performed by at least one block-type thermal power station (16) comprising a gas-fired internal combustion engine and a generator. The heat exchanger preheats the gas to be expanded before the gas is supplied to the turbo generator for expansion. Both the block-type thermal power station (16) and the turbo generator (13) generate electric energy which is fed into the power supply network (18).

Abstract: The present invention pertains to a rotor for permanent magnet-excited electric machines, on the circumferential surface of which permanent magnets are arranged, and fillers made of a nonmagnetic material are arranged between them, wherein the surface of the permanent magnets and fillers on the whole are made slightly conical and are covered by a separately manufactured binding under prestress.

Abstract: In order to provide a power recovery plant comprising a gas turbine with a turbine wheel and a generator with a rotor driven by the turbine wheel, in which the known bearing problems are diminished or even cease, it is suggested that the turbine and the generator be combined in a plant housing to form one unit, that the turbine wheel and the rotor form a rotor unit rotating as a whole and that the rotor unit be rotatably mounted in the plant housing by magnetic bearing units in a non-contact manner.

Abstract: In order to improve a rotor for electric machines, in particular for machines of high rotational speed, having a rotor core and a rotor shell comprising a binding made of fiber-reinforced plastics radially supporting the rotor core such that the rotor shell is supported on the rotor core essentially over the entire surface and with an essentially uniform surface load, it is suggested that the rotor core has an outer shell surface with a small cone angle on which the rotor shell is supported with an inner shell surface having the same cone angle, and that the rotor shell has a protective layer between the inner shell surface and the binding.

Abstract: A transfer molded semiconductor circuit package with two spaced, parallel, exteriorly accessible substrate plates located symmetrically to a medial plane of the package and encapsulated, to levels flush with their remote faces, in a body of low stress semiconductor grade molding compound. The package has precisely parallel outer faces constituted at least in part by the remote faces of the substrate plates and enabling full-surface engagement of the substrate plates with respective heat sinks. A method of making the package is also disclosed. The symmetry of the arrangement of the substrate plates inhibits any bending thereof during the molding of the package such as would occur in a single substrate plate due to differences between the thermal expansion coefficients of the molding compound and the substrate plates.

Abstract: 400 Hz aircraft ground power supply with a three phase AC power source connectable via an electric power relay and flexible cable provided with a socket connector to a plug connector at the aircraft. In the energizing circuit of the power relay is arranged a closing contact of a second electric relay, the energizing circuit of which is led via switching means at the socket connector to be actuated by a pin of the plug connector. Thus the closing contact of the second relay is opened as long as the socket connector is not plugged to the plug connector. A third electric relay energized via the connectors by a source of DC current on board the aircraft has a closing contact in parallel to the closing contact of the second relay in the energizing circuit of the power relay and further opening contacts disconnecting a separate source of voltage in the energizing circuit of the second relay if the third relay is energized.

Abstract: Static inverter with controlled semiconductor switches and anti-parallel diodes and with a control device for providing a current well above the rated current in the case of a short circuit in a consumer for quickly blowing a fuse in the circuit of the consumer. Anti-parallel thyristors are connected across the inverter output. The control device upon a short circuit takes over the control from the normal inverter control device and switches the semiconductor switches between two curents in the load circuit, of which the higher current represents the peak current limit for the semiconductor switches and the lower current lies considerably above the rated current. The control blocks the semiconductor switches when the current limit is reached and fires at least that thyristor which allows current to pass in the direction of the actual current flow.

Abstract: Electric semiconductor switching module for a switching arrangement with switching times of the order of magnitude of 100 ns and large currents. The switching arrangement features a parallel connection of active semiconductor switching elements and freewheel diodes, which are each arranged in direct proximity, and having a load connection of the semiconductor switching elements and freewheel diodes such that current flows in the same direction relative to the load connection through the semiconductor switching elements and the freewheel diodes. The connections for the direct current voltage source are designed with spatially closely adjacent conductors, in particular two conductor layers separated by an insulating layer.

Abstract: A cable drum 1 powered by an electric motor (2) for multi-conductor cables of heavy cross-section. To provide for insertion of the cable (4) into the cable drum (1) to be carried out without the use of slip-rings, twistable conductors (10) of high-elasticity are provided and are attached to rotate with the drum (1) at one end of a length L coaxial with the axis of rotation 1a of the drum (1). At the other end of the length L the conductors (10) are attached in a non-rotatable manner to a terminal box (15). The conductors (10) in the length L are guided between the points of attachment 12, 14 within a fixed tube (13). The terminal box (15) may be mounted on a slide 15a for movement in the axial direction of the tube and may be held under the tension of a spring (16) acting in the direction opposed to the movement. Alternatively the tube can be mounted at an angle to the axis of the rotation of the cable drum (1).

Abstract: A rotary converter machine which includes a stator with three-phase primary, and secondary windings, and a rotor mounted within the stator which includes a damping winding. The primary and secondary stator windings are arranged on a common stator pack and located in continuous stator slots, both windings extending over the whole axial length of the common stator pack. The converter machine provides a direct transfer of the electrical energy by flux linkage between the two windings. The rotor is driven by the rotating magnetic field either asynchronously, if a drum rotor is provided, or synchronously, if a salient-pole rotor is provided.

Abstract: The invention concerns a multistage centrifugal-chamber separator unit for separating solids from a gas stream. A plurality of parallel flow channels with centrifugal chambers connected to them are provided. Corresponding to the decrease of the flow volume, the total number of the centrifugal chambers in all the flow channels decreases in successive stages in the direction of flow. Transverse ducts which connect together the parallel flow channels are provided between stages with differing numbers of centrifugal chambers and are so designed that the flow channels of the following stage, reduced in number, are loaded equally by the gas stream. The separator unit has a plurality of identical structural elements which on one side have the configuration of the centrifugal chamber, including the trailing and leading edges. A plurality of separator units of this kind may be arranged parallel to one another in a housing.

Abstract: The invention concerns a centrifugal chamber filter for separating solids from a gas stream. The filter has a cylindrical centrifugal chamber and outlet pipes which extend towards each other from the ends of the chamber for conducting away the purified gas. In order to convert the rotational flow energy into pressure energy, a distributor with radial blading is mounted between the adjacent inlet ends of the outlet pipes within the chamber. The outlet pipes are advantageously each provided with a nozzle ring at its inlet end. The distributor and/or the nozzle ring are advantageously designed to be slidable onto the ends of the outlet pipes.