| ABB Schweiz AG Patent applications |
| Patent application number | Title | Published |
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| 20120125750 | SWITCHING UNIT FOR A CIRCUIT BREAKER HAVING A ROCKER LEVER - An exemplary switching unit is disclosed for operation of a rocker lever of a circuit breaker, which is provided on the circuit breaker. The switching unit has a drive unit with a free-play distance, such that a slide of the drive unit, which slide is intended for operation of the rocker lever, does not impede the movement of the rocker lever. | 05-24-2012 |
| 20120013199 | METHOD FOR OPERATION OF A CONVERTER CIRCUIT AND APPARATUS FOR CARRYING OUT THE METHOD - A method and apparatus are provided for operation of a converter circuit, which includes a converter unit having a multiplicity of controllable power semiconductor switches, and which is connected via a transformer to a three-phase electrical AC voltage power supply system. The method includes controlling the controllable power semiconductor switches by means of a control signal which is formed from a regulating signal. In order to damp oscillations of a power supply system voltage above the fundamental frequency, a filtered power supply system current is formed by filtering a power supply system current using a low-pass filter characteristic. A filtered transformer inductance voltage is formed by filtering a transformer inductance voltage, which is formed from the power supply system current, using a low-pass filter characteristic. A filtered power supply system voltage is formed by filtering a power supply system voltage using a low-pass filter characteristic. The regulating signal is formed by addition of a regulator voltage, the filtered transformer inductance voltage, and the filtered power supply system voltage, where the regulator voltage is formed by regulating the filtered power supply system current at a power supply system current nominal value. | 01-19-2012 |
| 20110235221 | BRIDGING UNIT - A converter cell of a modular converter is provided. The converter cell includes a bridging unit which has a mechanical bistable relay, an electronic switch, a drive for switching the relay and the electronic switch, and an energy store for supplying power to the mechanical relay, the electronic switch and the drive. The drive includes passive overvoltage detection configured to charge the energy store if the overvoltage is exceeded. The drive includes an additional switch which is closed when a voltage on the energy store exceeds a predefined value, and the drive supplies current from the energy store to at least one of the relay and the electronic switch. The drive has hysteresis, such that, if the voltage on the energy store is undershot, at least one of the relay and the electronic switch is still supplied with current from the energy store. | 09-29-2011 |
| 20110194323 | METHOD FOR OPERATION OF A CONVERTER CIRCUIT, AS WELL AS AN APPARATUS FOR CARRYING OUT THE METHOD - A method is provided for operation of a converter circuit. The converter circuit has at least two phase modules, where each phase module has a first and a second sub-converter system, and the sub-converter systems for each phase module are connected in series with one another. Each sub-converter system includes a plurality of series-connected two-pole switching cells. In the method, the control signals for the switching cells are additionally formed from a damping signal. The damping signal is formed from a measured current through the respective sub-converter system and from a predeterminable resistance value, in order to attenuate undesirable currents in the sub-converter systems. | 08-11-2011 |
| 20110075465 | DIRECT CONVERTER AND SYSTEM INCLUDING A DIRECT CONVERTER - A direct converter includes n input phase connections and p output phase connections, where n≧2 and p≧2. The direct converter also includes (n·p) two-pole switching cells for switching at least one positive voltage and at least one negative voltage between the poles. Each output phase connection is connected in series with each input phase connection, respectively, via a switching cell. To enable any desired and continuous current flow setting from an input phase connection to an output phase connection of the direct converter and, moreover, to exchange electrical energy between the two-pole switching cells of the direct converter, at least one inductance is connected into each series connection. A system including a direct converter is also provided. | 03-31-2011 |
| 20110040506 | MODULE FOR MEASURING THE CURRENT FLOWING IN A CONDUCTOR OF A LOW-VOLTAGE DISTRIBUTION BOARD - A module is provided for measuring current flowing in a conductor of a low-voltage distribution board. The module includes a current sensor for detecting the current, a microprocessor circuit for processing an output signal from the current sensor, and a module housing which accommodates the current sensor and the microprocessor circuit. The module housing has an opening for passing the current conductor, an interface with two current connections, and a connection element for releasably fastening the module in the low-voltage distribution board. To enable the module to be simply installed in the low-voltage distribution board and ensure operational reliability of the module, the passage opening extends from a side of the module housing bearing the interface, through the current measuring module, to an opposite side of the module housing, and the module is DC-isolated from the current conductor after it has been installed in the low-voltage distribution board. | 02-17-2011 |
| 20100253304 | METHOD FOR OPERATION OF A CONVERTER CIRCUIT, AND APPARATUS FOR CARRYING OUT THE METHOD - An exemplary method is disclosed for operation of a converter circuit having first and second partial converter systems, the partial converter systems being connected in series to one another via two series-connected inductances. A junction point of the two series-connected inductances forms an output connection. Each partial converter system can include at least one two-pole switching cell, each switching cell having two series-connected controllable bidirectional power semiconductor switches. The power semiconductor switches in the switching cells of the first and second partial converter system are controlled by first and second control signals. A capacitive energy store in the converter circuit can be designed independent of desired current at the output connection of the converter circuit. | 10-07-2010 |
| 20100219786 | METHOD AND APPARATUS FOR DETERMINING A FIELD CURRENT IN BRUSHLESS ELECTRICAL MACHINES - A method and an apparatus are described for determining a field current through a field winding in an electrical machine with a stator and a rotor. The electrical machine includes a field-circuit transformer to produce, by induction of an electrical current on the rotor side, field current with which a field winding is energized in order to generate an excitation magnetic field. The method includes driving the primary side of the field-circuit transformer to produce a field current in the rotor, which is derived from the current induced on the secondary side in the field-circuit transformer; measuring one or more phase currents in one or more primary-side phases of the field-circuit transformer; determining a maximum value depending on the one or more measured phase currents; determining the field current through the field winding depending on the determined maximum value. | 09-02-2010 |
| 20100134943 | METHOD FOR DISTURBANCE CURRENT COMPENSATION FOR AN ELECTRICAL SYSTEM, AND DISTURBANCE CURRENT COMPENSATION DEVICE - An exemplary method is disclosed for disturbance current compensation for an electrical system by a disturbance current compensation device, which electrical system has a voltage source and a series circuit which is connected via a conductor in parallel with the voltage source. The series circuit has an inductance and a capacitance, with the inductance being connected in series with the capacitance via a conductor. To compensate for disturbance currents, the conductor for the connection of the voltage source to the series circuit of the inductance with the capacitance, and/or the conductor of the series circuit between the inductance and the capacitance, can be surrounded by a ring (e.g., a portion of the conductor can be substantially surrounded by the ring) which can be magnetized. The ring includes an air gap of the disturbance current compensation device. A compensation voltage can be applied by magnetization of the ring. The ring can be magnetized by a magnetization coil of the disturbance current compensation device. | 06-03-2010 |
| 20100123365 | ARRANGEMENT FOR CLOSURE OF SLOTS - An exemplary slot closure arrangement has a sliding block and a pressure piece. At least one spring element is arranged in between them and can be prestressed by at least one attachment, which interacts with the sliding block and the pressure piece, thus creating a prefabricated assembly. Once the slot closure arrangement has been positioned in a slot, the attachment can be mechanically moved from a first position to a second position, which can be monitored, after positioning of the slot closure arrangement, for activation of the spring forces of the at least one spring element. | 05-20-2010 |
| 20090295312 | STARTING APPARATUS FOR AT LEAST TWO SYNCHRONOUS MACHINES - A starting apparatus is disclosed for at least two synchronous machines, which starting apparatus includes an exciter unit which is provided for each synchronous machine and is associated with the respective synchronous machine. Each exciter unit can be connected to the field winding of the associated synchronous machine. A superordinate control unit is provided, with the superordinate control unit being connected via a communication link to each exciter unit. Furthermore, the starting apparatus includes at least one stator feed unit and at least one switching device, which is provided for each stator feed unit and is associated with the respective stator feed unit, in which case the respective switching device can be connected to the associated stator feed unit, the respective switching device can be connected to at least one synchronous machine, and the switching devices can be connected to one another when there are a plurality of switching devices. The exciter units can be connected to one another via a ring communication link. Each stator feed unit can be connected to the ring communication link. Each stator feed unit can also be connected via a communication link to an associated switching device, and exciter units which are associated with the stator feed units can be each connected via a communication link to a switching device. | 12-03-2009 |
| 20090257253 | METHOD FOR OPERATING A CONVERTER CIRCUIT AND APPARATUS FOR IMPLEMENTING THE METHOD - The disclosure specifies a method for operating a converter circuit, the converter circuit having a converter unit with a large number of drivable power semiconductor switches and with a three-phase electrical AC voltage system, in which the drivable power semiconductor switches are driven by means of a drive signal (S | 10-15-2009 |
| 20090239408 | ELECTRICAL CONNECTION DEVICE AND CONNECTOR - The disclosure relates to a connection device, in particular a heavy-duty plug-type connection, with a first connector and a second connector, which each have a contact-making element in order to produce an electrical connection in the connected state of the connectors; the connectors bearing against one another at a connection region in the connected state; at least one of the connectors comprising a coolant line with one or more access points for the supply and discharge, respectively, of a coolant; the coolant line being provided at the contact-making element in order to dissipate heat from a contact point between the contact-making elements; all of the access points of the coolant line being arranged outside of the connection region. | 09-24-2009 |
| 20090237964 | METHOD FOR OPERATING A CONVERTER CIRCUIT AND APPARATUS FOR IMPLEMENTING THE METHOD - A method is disclosed for the operation of a converter circuit, wherein the converter circuit has a converter unit having a multiplicity of actuatable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which the actuatable power semiconductor switches are actuated by means of an actuation signal (S) formed from a hysteresis active power value (d | 09-24-2009 |
| 20090212641 | METHOD FOR OPERATING A CONVERTER CIRCUIT, AND APPARATUS FOR CARRYING OUT THE METHOD - A method for operating a converter circuit is disclosed. Such a converter circuit has a converter unit with a multiplicity of actuatable power semiconductor switches and is connected to a three-phase electrical AC mains system and in which the actuatable power semiconductor switches are actuated by means of an actuation signal (S | 08-27-2009 |
| 20090212568 | ENERGY SYSTEM - An energy system is specified, which comprises a wind power turbine or water power turbine, which is connected to a generator, with the generator having at least two stator windings. In order to achieve a simple and robust design without a transformer, each stator winding has an associated rectifier unit, and each stator winding is connected to the AC voltage side of the associated rectifier unit. Furthermore, each rectifier unit has a respective associated energy storage circuit, and each rectifier unit is connected in parallel on the DC voltage side to the associated energy storage circuit, with the energy storage circuits being connected to one another in series. | 08-27-2009 |
| 20090147540 | METHOD FOR OPERATING A CONVERTER CIRCUIT - A method and arrangement are disclosed for operating a converter circuit. Such a converter circuit has a converter unit having a multiplicity of drivable power semiconductor switches. The converter unit is connected to an electrical AC voltage supply system on the AC voltage side. The drivable power semiconductor switches are driven by means of a drive signal formed from reference voltages (u*Na, u*Nb, u*Nc). The reference voltages (u*Na, u*Nb, u*Nc) are formed from a periodic modulation index and from a periodic modulation angle. | 06-11-2009 |
| 20090096396 | Method for Determining the Rotor Position of a Separately Excited Rotating Electrical Machine - A method is specified for determining the rotor position of a separately excited rotating electrical machine which machine has a stator winding set and a rotor winding set and in which method the stator winding set is fed from an associated converter unit, and the rotor winding set is fed from an associated exciter unit. First of all, the stator winding set is short-circuited by means of the converter unit. An exciter voltage signal is then applied to the rotor winding set by means of the exciter unit, which exciter voltage signal has a change from a variable first voltage value to a variable second voltage value: Furthermore, the stator current (Isa, Isb, Isc) is determined in each winding of the stator winding set, and a rotor position angle (θ) is calculated. | 04-16-2009 |
| 20090085548 | CONVERTER CIRCUIT AND METHOD FOR OPERATING SUCH A CONVERTER CIRCUIT - A converter circuit is specified in which, in order to avoid losses to the greatest possible extent, a first inductance is connected in series into the connection of a DC voltage source of the converter circuit to a first switch of the converter circuit, and in which, moreover, a second inductance is connected in series into the connection of a second switch of a switching group of the converter circuit to the junction point between a second capacitive energy store and a second unidirectional non-drivable power semiconductor switch of the switching group. Two further alternative converter circuits and also a method for operating the converter circuit are furthermore specified. | 04-02-2009 |
| 20080303462 | METHOD FOR OPERATION OF A THREE-PHASE ROTATING ELECTRICAL MACHINE, AND AN APPARATUS FOR CARRYING OUT THE METHOD - A method and apparatus are provided for operation of a three-phase rotating electrical machine which has at least two stator winding sets and each stator winding set has three phase windings connected in star, and the star circuits of the stator winding sets have a phase shift of 30 degrees electrical with respect to one another, and an associated converting unit is respectively provided for each stator winding set, in which method the respective stator winding set is fed by the associated converter unit, and a respectively associated regulation device is provided for each converter unit, and each converter unit is driven by means of a drive signal from the associated regulation device independently of regulation devices of the respective other converter units. | 12-11-2008 |
| 20080297088 | Fuel/electric drive system - A fuel/electric drive system having an internal combustion engine is disclosed, having a generator which is driven by the internal combustion engine and has a first stator winding set, having a first rectifier which is connected to the first stator winding set at the AC voltage end and to a first DC voltage circuit at the DC voltage end, and having a first inverter which is connected to the first DC voltage circuit at the DC voltage end and to a drive motor at the AC voltage end. In order to increase the robustness and availability of the fuel/electric drive system, the generator has a second stator winding set, with a second rectifier being connected to the second stator winding set at the AC voltage end and to a second DC voltage circuit at the DC voltage end, and a second inverter being connected to the second DC voltage circuit at the DC voltage end and to the drive motor at the AC voltage end. | 12-04-2008 |
| 20080278977 | Method for operating a converter circuit, and device for carrying out the method - A method for operating a converter circuit is specified with the converter circuit having a converter unit with a multiplicity of controllable power semiconductor switches and having an energy storage circuit formed by two series-connected capacitors, in which the controllable power semiconductor switches are controlled by means of a control signal formed from a hysteresis signal vector (x), and the hysteresis signal vector (x) is formed from a difference-phase connection current vector (Δi | 11-13-2008 |
| 20080211464 | SYSTEMS OF PARALLEL OPERATING POWER ELECTRONIC CONVERTERS - A converter unit is disclosed which produces an output voltage based on reference signals (u* | 09-04-2008 |
| 20080204959 | Method for fault handling in a converter circuit for wiring of three voltage levels - The document specifies a method for fault handling in a converter circuit for switching three voltage levels, in which the converter circuit has a converter subsystem provided for each phase (R,S,T), in which a top fault current path (A) or a bottom fault current path (B) in the converter subsystem is detected, the top fault current path (A) running through the first, second, third and sixth power semiconductor switches in the converter subsystem or through the first and fifth power semiconductor switches (S | 08-28-2008 |
| 20080204044 | Method for detecting islanding operation of a distributed generator - An exemplary method comprises the steps of introducing a reactive current reference square wave, detecting load voltage changes at every change in the reactive current reverence wave, and determining whether the detected load voltage changes exceed a predefined islanding detection threshold value, indicating a loss of mains and an islanding operation of the power generator. With the exemplary loss-of-mains detection, islanding can be detected within a shortest period of time, even if the local islands active and reactive load matches exactly the distributed generators active and reactive power generation. So even without a sudden voltage change, unintentional islanding can immediately be detected and control electronics can safely turn of the distributed power generator. | 08-28-2008 |
