Patent application number | Description | Published |
20080205093 | Apparatus for Electrical Power Transmission - A device for the transmission of electrical energy includes at least one current converter. Each current converter has phase elements with respective arrangements of circuit elements that comprise at least two switchable power semiconductors each and at least two free-wheeling diodes, each connected in parallel thereto, and energy storing means. The transfer properties in or between power distribution networks are improved with the novel device. The device is provided with means for controlling the current converter in such a manner that the zero crossing, the amplitude and/or the instantaneous values of an alternating current of a transfer network that can be connected to the device and/or the direct current of a direct current line that connects at least one current converter to a direct current source, and/or the direct voltage and the direct current of at least three interconnected current converters can be controlled. | 08-28-2008 |
20080207027 | Electronic Module - An electronic module has at least one first and one second connecting terminal and power semiconductors which are connected by way of connecting conductors, diodes which are each connected in parallel with the power semiconductors and at least one capacitor, likewise connected to the power semiconductors by connecting conductors, which is used, in the event of a fault, to ensure a high degree of availability and operational reliability of a converter; the connecting conductors of the novel device have at least two sections which run parallel to one another and at least one of which can be deformed. The sections are used to guide the current flowing in the electronic module in the opposite direction and are dimensioned such that, when a threshold current is exceeded, they form a conductive connection between the connecting terminals and bridge the power semiconductors and each capacitor. | 08-28-2008 |
20080239777 | Apparatus for Converting an Electrical Current and Method for Reducing the Load-Change Stress of Power Semiconductor Units in the High-Voltage Energy Distribution and Transmission Sector - An apparatus for converting an electrical current in a high-voltage energy distribution and transmission system has one or more current converter valves with a series circuit of a plurality of power semiconductor units. A cooler cools the power semiconductor units. Temperature deviations of the power semiconductor units can be decreased in a cost-effective manner in that the cooler is provided with a control unit that provides cooling in dependence on a current flow via the power semiconductor units. | 10-02-2008 |
20090141416 | Device for Short-Circuiting Power Semiconductor Modules - An apparatus has power semiconductor modules, which are connected to one another via connection devices so as to form a series circuit. A short-circuiting device for short-circuiting the respective power semiconductor module is assigned to each power semiconductor module. The apparatus has a reliable and at the same time cost-effective short-circuiting device. It is proposed that the short-circuiting device is a pyrotechnical/mechanical element, which has a detonation charge and a tripping device, which can be displaced by the detonation charge. | 06-04-2009 |
20090250799 | Power Semiconductor Module Comprising an Explosion Protection System - A power semiconductor module for energy distribution, includes at least one power semiconductor, connection terminals for connecting the power semiconductor module, and a housing, in which protection from explosion is ensured in the module even in the event of electric arcs. Therefore, each power semiconductor and each connection terminal is disposed in the housing, and the housing includes an exhaust gas channel for the controlled withdrawal of hot gases and/or plasma in the event of an explosion. | 10-08-2009 |
20090257165 | Overcurrent Switching Apparatus - In order to form an overcurrent switching apparatus for medium-voltage or high-voltage applications with a current detection device for changing over a contact system associated with them from a first state to a second state in the event of a threshold current being exceeded, the switching properties of which overcurrent switching apparatus are precise, an actuating device is disposed downstream of the current detection device, which is in a first current branch, via a coupling device. The actuating device is configured to change over the contact system, which is in a second current branch, from the first to the second state. | 10-15-2009 |
20090262477 | SHORT-CIRCUIT CURRENT LIMITER - In order to provide a power semiconductor module for power distribution and transmission, having a power semiconductor circuit which is connected via connecting lines to an energy storage device, which limits the current amplitudes that occur in the electrical fault and effectively protects the power electronics, it is proposed that the connecting lines have a weak point which breaks when the current load is above a threshold value, with the connecting lines furthermore having a resistance which is connected in parallel with the weak point. | 10-22-2009 |
20100020577 | PRODUCTION OF A REAL POWER EQUILIBRIUM OF THE PHASE MODULES OF A CONVERTER - A converter has at least one phase module, an AC voltage terminal and a DC voltage terminal. A phase module branch is formed between each DC voltage terminal and each AC voltage terminal. Each phase module branch has a series circuit containing submodules which each have a capacitor, a power semiconductor, and submodule sensors for detecting energy stored in the capacitor and with a regulation device for regulating the apparatus in dependence on energy values and predetermined desired values. Therefore unbalanced loading of the energy storage units is avoided. The regulation device has a summation unit for summing the energy values while obtaining branch energy actual values and a device for calculating circuit current desired values in dependence on the branch energy actual values. The regulation device compensates for imbalances in the branch energy actual values in dependence on the circuit current desired values. | 01-28-2010 |
20100034001 | Converter with Short-Circuit Current Limiting - A device for inverting an electric current has at least one phase module which has an alternating current connection and at least one direct current connection. Semiconductor valves having semiconductor modules are connected in series and are provided for switching the electric current between the alternating current connection and each direct current connection. At least one power storage device is provided for storing electrical power. In order to provide such a device, with which the adverse effects of a bridging short circuit are reliably and effectively reduced, it is proposed that each semiconductor module has semiconductor groups connected in parallel to each other, wherein each semiconductor group of the semiconductor module is connected via its own separate semiconductor current path to at least one of the power storage devices. | 02-11-2010 |
20100060235 | DRIVING OF A PHASE MODULE BRANCH OF A MULTILEVEL CONVERTER - A method for charging and/or discharging energy storage devices is performed in a multilevel converter including at least one phase module branch having a series circuit of submodules each with at least one power semiconductor circuit for connection or disconnection of an energy storage device in a circuit parallel to the power semiconductor circuit and a submodule sensor for detection of an energy storage actual value. An energy change state is obtained and a determination is made as to whether connected energy storage devices in a phase module branch can be charged or discharged. The next energy storage device to be switched in each phase module branch is selected by predetermined logic dependent on an energy change state, through which energy stored in energy storage devices is kept approximately at the same level. A high clock rate is simultaneously avoided for connection and disconnection of the selected energy storage device. | 03-11-2010 |
20100066174 | SEMICONDUCTOR PROTECTION ELEMENTS FOR CONTROLLING SHORT CIRCUITS AT THE DC END OF VOLTAGE SOURCE CONVERTERS - A device for converting an electric current includes at least one phase module having an AC terminal and at least one DC terminal. Phase module branches, each of which is equipped with serially connected submodules, are respectively provided between each DC terminal and each AC terminal. Each submodule is provided with at least one power semiconductor. Semiconductor protecting means are connected in parallel or in series to at least one of the power semiconductors to enable the device to withstand even high short-circuit currents for a sufficient period of time. A method for protecting the power semiconductors of the device, is also provided. | 03-18-2010 |
20100067266 | CONTROL OF A MODULAR CONVERTER WITH DISTRIBUTED ENERGY STORAGE DEVICES - A device for converting an electrical current includes at least one phase module with an AC connection and at least one DC connection. A phase module branch is provided between each DC connection and each AC connection. Each phase module branch has a series connection made of sub-modules, which in turn include an energy accumulator each and at least one power semiconductor. Measuring sensors provide actual values and there are provided control means connected to the measuring sensors. The control can be easily adapted to any arbitrary number of sub-modules in each phase module branch. The control means include a current regulating unit and control units associated with a phase module branch each, wherein the current regulating unit is configured to provide branch target values for the control units. The control units are designed to produce control signals for the sub-modules. | 03-18-2010 |
20100085785 | Method For Limiting Damage To A Converter Having Power Semiconductors In The Case Of A Short Circuit In The DC Voltage Intermediate Circuit - A device for converting an electric current has a phase module, which in turn has an alternating current connection and at least one direct current connection connected to an intermediate direct current circuit. The device further has an energy accumulator. A phase modulation path is formed between each direct current connection and each alternating current connection. Each phase modulation path has a series connection of submodules, which each have a power semiconductor. A semiconductor protective device is provided in parallel connection to power semiconductors of each submodule. A control unit actuates the semiconductor protective device, and energy accumulator(s) are equipped for supplying energy to the control unit. The device safely prevents damage from a short circuit on the direct-current side, even when the supply grid is connected, because a direct current connection of each phase module is connected to the intermediate direct current circuit via a direct-current switch. | 04-08-2010 |
20100118453 | Apparatus for Protection of Converter Modules | 05-13-2010 |
20100118578 | DEVICE FOR CONVERTING AN ELECTRIC CURRENT - A device for converting an electrical current includes at least one phase module with an AC voltage connection and at least one DC voltage connection, a phase module branch disposed between each DC voltage connection and the AC voltage connection and each phase module branch having a series circuit of submodules, each of which has an energy accumulator and at least one power semiconductor and closed-loop control means for regulating the device. The device can regulate circulating currents in a targeted manner by providing each phase module with at least one inductance and configuring the closed-loop control means to regulate a circulating current that flows through the phase modules. | 05-13-2010 |
20100321038 | MONITORING OF THE AGING OF THE CAPACITORS IN A CONVERTER BY MEANS OF CAPACITANCE MEASUREMENT - A method and a device for converting an electrical current include at least one phase module having an AC voltage connection and at least one DC voltage connection. A phase module branch is disposed between each DC voltage connection and the AC voltage connection. Each phase module branch includes a series circuit of submodules, each having a capacitor and at least one power semiconductor. The apparatus can establish aging of an energy storage device in a simple manner by using a capacitor diagnosis device for a time-dependent determination of the capacitance of each capacitor. | 12-23-2010 |
20110057762 | SHORT-CIRCUITING APPARATUS WITH PYROTECHNIC INITIATION - A short-circuit device for the electrical bypass of an electric module has a contact arrangement, which is disposed in a switching chamber. The contact arrangement has an open circuit-breaker setting, in which a current flow via the contact arrangement is interrupted, and a contact setting, in which a current flow via the contact arrangement is made possible. A pyrotechnic drive for transferring the contact arrangement from its circuit breaker setting into its contact setting, enables cost-effective, rapid bypass or short-circuiting, and the provision of a large current carrying capacity simultaneously. The switching chamber is a vacuum switching chamber in which a vacuum prevails. | 03-10-2011 |