Robert Boschgmbh

Seg Automotive Germany Gmbh

Thomas Peuser

Anton Paweletz

Helmut Suelzle

Jochen Fassnacht

Calin Purcarea

Stephan Gase

Thomas Merkel

Gunter Meyer

Robert Schenk

The invention relates to an inverter circuit for the alternating connection of the phases of a three-phase load to a DC source, having pairs of electronic switches connected in parallel with one The two switches of each pair are connected in series, and wherein the connection for the respective phase of the load is provided at the connection of the two electronic switches belonging to the pair. An intermediate circuit capacitor is connected in parallel to the DC source. Electric connections are provided between the intermediate circuit capacitor and the power module for the connection of the switch pairs. The circuit arrangement has a buffer capacitor connected to a connection of the switch pairs. A first diode connects the buffer capacitor to the other connection of the switch pairs. A step-down controller connects the buffer capacitor to the intermediate circuit capacitor.

Inverter circuit comprising a circuit arrangement for regenerative damping of electrical oscillations, and method for regenerative damping of electrical oscillations

The invention relates to an electronic component. The electronic componenthas an electrical assemblyhaving two electrical connectionsthat are each formed on opposing faces of the assembly. For each connection, the component has at least one electrically conductive connection elementhaving a mounting footfor connection to a circuit carrier. According to the invention, the connection elementhas at least two metal layersat least on one section, wherein the metal layers are each formed from different metals and integrally connected to one another. Preferably, one metal layerfrom the metal layers has greater thermal conductivity than the other metal layer

Electronic component having a connection element

The invention relates to a device and method for discharging an energy accumulator (C), in particular an intermediate circuit capacitor, in a high-voltage grid (), in particular in a direct current intermediate circuit in a motor vehicle, having a direct current converter () connected downstream of the high-voltage grid (), a low-voltage grid () connected downstream of the direct current converter (), an power grid () connected downstream of the direct current converter () and parallel to the low-voltage grid () for supplying energy to a control circuit () of the direct current converter (), and a first controllable switching element (S) which is connected to the connecting line between the direct current converter () and the low-voltage grid () and by means of which, in the event of a disturbance of the low-voltage grid (), the direct current converter () and the power grid () can be disconnected from the low-voltage grid (). The power grid () is connected to the direct current converter () via a first electrical component () which prevents a backflow of current from the power grid () into the direct current converter ().

Device and method for discharging an energy accumulator in a high-voltage grid

The present invention discloses a protection apparatus for an IT network having a first and a second live line, having a signal generator which is designed to feed a first signal to the first and/or to the second live line, having a detection device which is designed to detect the profile of the fed first signal in at least one live line, and having a control device which is designed to analyze the detected profile and to output a disconnection signal when the analysis of the detected profile indicates that a living organism is in contact with the first live line and the second live line. The present invention also discloses a method and a power supply system.

Protection apparatus, method and power supply system

A method, a device and an electrical system for discharging a first electrical network. The first electrical network comprises in particular an intermediate circuit which comprises in particular an intermediate-circuit capacitor. The first electrical network is connected to a second electrical network by means of a DC-DC converter for this purpose. The first electrical network is discharged by means of the DC-DC converter. At the same time, the DC-DC converter transfers electrical energy into the second electrical network. For discharging, the output voltage of the DC-DC converter is set to a first voltage value, which is larger than the nominal voltage of the second electrical network. For discharging, the output voltage of the DC-DC converter is set to the first voltage value for a predefinable first period of time.

Method and device for discharging an electrical network

A circuit arrangement () for monitoring electrical isolation in a power supply system (). Electrical isolation is provided between a high-voltage system () and a low-voltage system (), wherein the high-voltage system () and the low-voltage system () are connected to ground (), and wherein the high-voltage system () has a first connection (T+) for a first supply voltage potential and a second connection (T&#x2212;) for a second supply voltage potential of a voltage source (). In each case, at least one variable resistor (RmRm) is connected between the connections (T+, T&#x2212;) and ground (), and a voltage measuring device () for detecting a potential shift of the ground () relative to the supply voltage potentials when at least one of the resistors (RmRm) is varied. And an evaluation device, which determines the ability of the electrical isolation to function depending on the detected potential shifts.

Circuit arrangement and method for monitoring electrical isolation

A limiting circuit for at least one semiconductor transistor. The circuit includes a limiting path which is coupled between a first power terminal and a second power terminal of the semiconductor transistor. The limiting path includes a limiting transistor. A node of the limiting path located between the limiting transistor and the second power terminal of the semiconductor transistor is coupled to a control terminal of the semiconductor transistor. A voltage source is coupled to the control terminal of the limiting transistor and is designed to apply a control voltage to said control terminal of the limiting transistor. The control voltage corresponds to a critical voltage for the voltage between the first power terminal and the second power terminal of the semiconductor transistor. The limiting transistor is switched to a conductive state when said critical voltage is exceeded at a power terminal of said limiting transistor.

Limiting circuit for a semiconductor transistor and method for limiting the voltage across a semiconductor transistor

A method for assigning addresses in a system having a first generator unit and at least one further generator unit positioned in parallel to the first generator unit. Each of the generator units has a control-signal input and a control-signal output. The control-signal input of each further generator unit is connected in each instance to the control-signal output of another of the generator units. Each of the further generator units receives an identification signal output at the control-signal output of a generator unit upstream of it, and assigns itself an individual address as a function of the respective identification signal received, the address depending on the length of the identification signal received.

Method and device for assigning addresses in a system having a plurality of generator units positioned in parallel

In a method for controlling a group of at least two electrical generators which supply a motor vehicle electrical system, each individual generator of the group provides a generator workload value, which indicates a workload of the individual generator, to each other one of the group of generators. The workload values represent an absolute value which indicates an actual power which is generated by the individual generator. Alternatively, the workload values represent a relative value, which indicates a ratio of the actual power to a nominal power of the individual generator.

Redundant parallel operation of motor vehicle electrical system generators

A method and a device are provided for providing a supply voltage for the consumers of a vehicle electrical system, using generator units connected in parallel. The measurement voltage inputs and the monitor outputs of the controllers of the generator units are used in the initialization phase for the assignment of master or slave function, as well as for address assignment if warranted, and during later parallel operation are used to bring the degree of utilization of the generators of the generator units connected in parallel into agreement.

Method and device for providing a supply voltage by means of generator units connected in parallel

A device for voltage supply includes a first generator and a second generator connected in parallel to it. A control unit is also provided, to which capacity utilization signals are made available by the first and the second generator. By an evaluation of the capacity utilization signals, the control unit ascertains control signals, which lead to a uniform load distribution with respect to the generators.

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Ludwigsburg, Germany

Thomas Peuser