Patent application number | Description | Published |
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 |
20080238214 | SWITCH GEAR CELL AND CONVERTER CIRCUIT FOR SWITCHING A MULTIPLICITY OF VOLTAGE LEVELS WITH A SWITCHGEAR CELL SUCH AS THIS - A switchgear cell having a group of connection is disclosed, with the group of connection having a first and a second controllable bidirectional power semiconductor switch and a capacitor. In order to reduce the stored electrical energy and to save space, the group of connection can have a third, fourth, fifth and sixth controllable bidirectional power semiconductor switch and the first controllable bidirectional power semiconductor switch can be connected back-to-back in series with the second controllable bidirectional power semiconductor switch, the third controllable bidirectional power semiconductor switch can be connected back-to-back in series with the fourth controllable bidirectional power semiconductor switch, the capacitor can be connected to the connection point of the first controllable bidirectional power semiconductor switch to the second controllable bidirectional power semiconductor switchand to the connection point of the third controllable bidirectional power semiconductor switch) to the fourth controllable bidirectional power semiconductor switch, the fifth controllable bidirectional power semiconductor switch can be connected to the connection point of the first controllable bidirectional power semiconductor switch to the second controllable bidirectional power semiconductor switch, and to the fourth controllable bidirectional power semiconductor switch, and the sixth controllable bidirectional power semiconductor switch can be connected to the connection point of the third controllable bidirectional power semiconductor switch to the fourth controllable bidirectional power semiconductor switch and to the second controllable bidirectional power semiconductor switch. | 10-02-2008 |
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 |
20090079267 | CONVERTER CONTROL UNIT - The disclosure relates to a converter control unit or power system stabilizing unit for counteracting oscillations in electric power systems that is equipped and employed to provide and processes information for system-wide monitoring, protection, control and metering. It comprises means for synchronized (e.g. via GPS or another absolute/global time reference) sampling of voltages and/or currents, means for down-sampling in order to decrease the number of samples, and means for calculating phasors, i.e. time stamped amplitude and phase angle of the voltages and/or currents. | 03-26-2009 |
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 |
20090141455 | CIRCUIT ARRANGEMENT FOR ELECTRICALLY CONTROLLING POWER AND COOLING ARRANGEMENT - The disclosure relates to a circuit arrangement for electrically controlling power, comprising at least one power control device and at least one heat extraction device. The at least one extraction device is in thermal contact with the at least one power control device. The heat extraction device is arranged such that it can be clamped to a fixed predefined electric potential and electrically insulated by the at least one power control device. | 06-04-2009 |
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 |
20090231896 | CONVERTER CIRCUIT FOR SWITCHING A LARGE NUMBER OF SWITCHING VOLTAGE LEVELS - A converter circuit for switching a large number of switching voltage levels is specified, in which a first switching group is provided for each. Second switching groups are provided, each having a first, second, third, fourth, fifth and sixth drivable bidirectional power semiconductor switch and capacitor. The first drivable bidirectional power semiconductor switch is reverse-connected in series with the second drivable bidirectional power semiconductor switch, the third drivable bidirectional power semiconductor switch is reverse-connected in series with the fourth drivable bidirectional power semiconductor switch, the first drivable bidirectional power semiconductor switch is connected to the capacitor, the third drivable bidirectional power semiconductor switch is connected to the capacitor, the fifth drivable bidirectional power semiconductor switch is directly connected to the fourth drivable bidirectional power semiconductor switch, and the sixth drivable bidirectional power semiconductor switch is directly connected to the second drivable bidirectional power semiconductor switch. | 09-17-2009 |
20130114314 | CONVERTER SYSTEM AND POWER ELECTRONIC SYSTEM COMPRISING SUCH CONVERTER SYSTEMS - Exemplary embodiments are directed to a converter system having a phase voltage source, n partial converter systems, wherein n≧1 and, when n=1, the partial converter system is connected to the phase voltage source at a connection point and, when n>1, the partial converter systems are connected to the phase voltage source at the connection point. Furthermore, a power switch is connected in series between the phase voltage source and the connection point. An interruption element is connected in series between the phase voltage source, the power switch, and the connection point to rapidly switch off a fault current via a partial converter system. Furthermore, a power electronic system including m converter systems is specified, wherein m>1. | 05-09-2013 |
20140139167 | TRANSFORMERLESS MULTILEVEL CONVERTER - An exemplary medium voltage system includes a multilevel converter connected to a grid connection. The multilevel converter is configured for converting a first multiphase current provided at the grid connection into a second current. The system includes a common mode filter, which, for each phase of the first current, includes a phase filter connected to the respective phase. Each phase filter is connected to a common filter star point which is connected to ground, includes an inductance and a capacitance connected in series, and includes a resistance connected in series with the capacitance such that the inductance and the resistor are connected in parallel. The common mode filter includes an impedance between the common filter star point and the ground. | 05-22-2014 |
20140197639 | Turbine-Based Energy Generation System With DC Output - An energy generation system includes a turbine, an electric generator, a step-up transformer, and a converter. The turbine is operable to extract energy from a fluid flow and convert the extracted energy into mechanical energy. The electric generator is operable to convert the mechanical energy from the turbine into AC electrical energy. The step-up transformer is operable to transfer the AC electrical energy at a lower voltage from the electric generator to a higher voltage. The converter is operable to convert the AC electrical energy at the higher voltage to DC electrical energy. The converter includes a converter leg for a phase of the AC electrical energy. The converter leg has an upper arm with a first plurality of sub-modules and a lower arm with a second plurality of sub-modules. Each sub-module is operable to function as a controlled voltage source. | 07-17-2014 |
20150035499 | METHOD FOR USING AN ELECTRIC UNIT - A power plant, and a method for using an electrical unit therefor are disclosed, wherein, an electrical machine can be connected to a power network via a converter and a block transformer. A method is disclosed for using the electrical unit, wherein the converter disconnects the block transformer from the machine in the event of a malfunction of the block transformer. | 02-05-2015 |