Abstract: A converter arrangement comprises a converter with a first side and a second side, a first connection line connected to the first side of the converter, a short-circuit switch connected to the first connection line, and a controller having a terminal coupled to the converter and an output connected to a control terminal of the short-circuit switch. A method for operating a converter arrangement comprises providing a detection signal by a converter, receiving the detection signal by a controller, providing a set signal to a short-circuit switch by the controller in case the controller determines a fault of the converter by evaluating the detection signal, and setting the short-circuit switch in a conducting state by the set signal.

Abstract: The invention relates to a method for operating a converter in an energy distribution system, wherein, by means of the converter, an electrical energy provided by a source is fed into an AC electricity network at a coupling point (E) or electrical energy is drawn from the AC electricity network at the coupling point (E), wherein the AC electricity network is coupled to further converters for feeding in or drawing electrical energy, wherein the converter has an inverter provided with power switches in order to provide an electrical variable, comprising providing one or a plurality of system state variables indicating a system state of the electricity network, selecting one of a plurality of commutation patterns depending on the one or the plurality of system state variables, and driving the inverter according to the selected commutation pattern.

Abstract: The invention relates to a method for operating a converter in an energy distribution system, wherein, by means of the converter, an electrical energy provided by a source is fed into an AC electricity network at a coupling point (E) or electrical energy is drawn from the AC electricity network at the coupling point (E), wherein the AC electricity network is coupled to further converters for feeding in or drawing electrical energy, wherein the converter has an inverter provided with power switches in order to provide an electrical variable, comprising providing one or a plurality of system state variables indicating a system state of the electricity network, selecting one of a plurality of commutation patterns depending on the one or the plurality of system state variables, and driving the inverter according to the selected commutation pattern.

Abstract: A converter apparatus and method for operating the converter apparatus are provided for producing a plurality of output voltages or a plurality of output voltage potentials at corresponding outputs. The converter apparatus includes a plurality of setting units, which are each associated with one of a plurality of input voltage sources, Each of the setting units is configured to vary an input voltage which is produced by the associated input voltage source, and to provide an intermediate voltage. The converter apparatus also includes a plurality of selection elements to which intermediate voltage potentials are each applied. The intermediate voltage potentials are defined by the intermediate voltages. Each selection element is configured to select one of the intermediate voltage potentials for outputting as the respective output voltage potential.

Abstract: A power-electronic arrangement comprising semiconductor components (102, 103, 107), a heat exchanger (110), and an electrically conductive element (109) is presented. The heat exchanger comprises evaporator channels (111) and condenser channels (112) for working fluid. The electrically conductive element comprises a contact surface providing a thermal contact to outer surfaces of walls of the evaporator channels for transferring heat from the electrically conductive element to the evaporator channels. A main current terminal of each semiconductor component is bonded to the electrically conductive element which thus forms a part of a main current circuitry of a power system. As the main current terminal is directly bonded to the electrically conductive element cooled with the heat exchanger, the temperature gradients inside the semiconductor components can be kept moderate, and thus the temperatures inside the semiconductor components can be limited.

Abstract: A method for fabricating an electrical module comprising a first substrate plate (101), a second substrate plate (102), and semiconductor components (103-110) between the first and second substrate plates is presented. Also an electrical module obtainable with the method and an electrical converter device including such electrical modules are presented. In the method, a bond (112) between first sides of the semiconductor components and the first substrate plate is made by sintering and, subsequently, a bond (111) between second sides of the semiconductor components and the second substrate plate is made by soldering. As the sintered bond can withstand high temperatures, a high temperature solder can be used for the soldered bond without damaging the earlier made sintered bond.

Abstract: A mechanical construction of an electrical module includes two or more electrical components (102-105). Each of the electrical components has a contact surface (106-109) that is capable of forming a galvanic contact with an external electrical conductor. The electrical module includes a holder element (101) that includes flexible material arranged to flexibly support the electrical components with respect to each other in such a way that the contact surfaces of the electrical components are capable of aligning with external surfaces independently of each other.

Abstract: A power-electronic arrangement comprising semiconductor components (102, 103, 107), a heat exchanger (110), and an electrically conductive element (109) is presented. The heat exchanger comprises evaporator channels (111) and condenser channels (112) for working fluid. The electrically conductive element comprises a contact surface providing a thermal contact to outer surfaces of walls of the evaporator channels for transferring heat from the electrically conductive element to the evaporator channels. A main current terminal of each semiconductor component is bonded to the electrically conductive element which thus forms a part of a main current circuitry of a power system. As the main current terminal is directly bonded to the electrically conductive element cooled with the heat exchanger, the temperature gradients inside the semiconductor components can be kept moderate, and thus the temperatures inside the semiconductor components can be limited.

Abstract: A semiconductor module includes first and second sub-units, each including at least one semiconductor chip, a first contact element having a first contact side, and a second or third contact element having a second or third contact side, respectively. The semiconductor chip has opposing first and second main electrode sides. The first main electrode side of the chip is thermally connected to the first contact side, and the second main electrode side is thermally connected to the second or third contact side. In the first sub-unit, a first fixation means connects the first and second contact elements and the chip together. In the second sub-unit, a second fixation means connects the first and third contact elements and the chip together. A flexible element, which is arranged between the first contact element and the first contact element, is electrically and thermally connected to the first contact elements.

Abstract: A switchgear cell is disclosed for switching n switching voltage levels, where n is an odd number of 5 or greater (i.e., n=5, 7, 9, . . . ,) is specified. The switchgear cell includes a first and a second branch circuit, wherein each branch circuit includes n-1 series-connected power semiconductor switches and p=n-2 power semiconductor switch junction points among the series-connected power semiconductor switches of each branch circuit. An intermediate circuit includes a first and a second capacitance, the first capacitance being connected to a power semiconductor switch junction point having an odd counting number x of the first branch circuit when the power semiconductor switch junction points can be counted starting with an odd counting number x from the first end to the second end of a respective branch circuit. The second capacitance is connected to a power semiconductor switch junction point of the second branch circuit.

Abstract: A switchgear cell is disclosed having a first energy store and a second energy store connected in series therewith, having a first, second, third and fourth power semiconductor switch, which are connected in series, wherein the first, second, third and fourth power semiconductor switch are in each case one drivable bidirectional power semiconductor switch with a controlled unidirectional current-conducting direction. The first power semiconductor switch is connected to the first energy store, and the fourth power semiconductor switch is connected to the second energy store. A third energy store is connected to the junction between the first and the second power semiconductor switch and the junction between the third and the fourth power semiconductor switch.

Abstract: A mechanical construction of an electrical module includes two or more electrical components (102-105). Each of the electrical components has a contact surface (106-109) that is capable of forming a galvanic contact with an external electrical conductor. The electrical module includes a holder element (101) that includes flexible material arranged to flexibly support the electrical components with respect to each other in such a way that the contact surfaces of the electrical components are capable of aligning with external surfaces independently of each other.