Robert Boschgmbh

Calin Purcarea

Daniel Schweiker

Martin Kessler

Erik Weissenborn

Peter Feuerstack

Thomas Peuser

Wolfgang Haas

Tim Bruckhaus

Tobias Richter

Falko Friese

Matthias Boesing

Deepa Mathai

The invention relates to a circuit arrangement () for controlling a plurality of semiconductor switches connected in parallel, having an activation connection () and a deactivation connection (), and having a plurality of control connections (), each provided for connection to a control connection () of one of the plurality of semiconductor switches, wherein the activation connection () and the deactivation connection () are each connected to each of the plurality of control connections (), and wherein a circuit breaker () is provided between the activation connection () and at least one of the control connections (), furthermore having at least one detection and control arrangement which is designed to detect a current flow in the at least one of the control connections () and, if a short-circuit is detected on the basis of the current flow, to control the circuit breaker () to open.

Circuit arrangement for controlling a plurality of semiconductor switches connected in parallel

The present invention relates to a method for short-circuit detection by saturation detection in power semiconductor switches and to a corresponding device. A reference voltage (U) is provided as a function of a supply voltage (UVDD) of a power semiconductor switch. A differential voltage (U) is generated from the difference of a voltage drop (U) of a load path of the power semiconductor switch and the provided reference voltage (U). The generated differential voltage (U) is compared with a predetermined threshold voltage (U). A short-circuit current in the load path of the power semiconductor switch is detected when the differential voltage (U) exceeds the threshold voltage (U). In this case, the power semiconductor switch is opened.

Method and device for short-circuit detection by saturation detection in power semiconductor switches

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 overvoltage protection circuit () and a method for protecting a power semiconductor () from over-voltages. For this purpose, a voltage applied across a power semiconductor switch is first converted to a lower voltage signal corresponding to the voltage applied to the power semiconductor switch by means of a resistance voltage divider. The reduced voltage signal is then evaluated by means of an overvoltage detector, such as a Zener or suppression diode, and the power semiconductor switch to be protected is activated if the response voltage of said diode is exceeded. By lowering the voltage level by means of a voltage divider, a Zener or suppression diode having a lower voltage level can be used for monitoring the overvoltage, said Zener or suppression diode having improved operating properties in comparison with corresponding diodes having a higher voltage level.

Overvoltage protection circuit for a power semiconductor and method for protecting a power semiconductor from over-voltages

The disclosure relates to a power transmission arrangement having an electromagnetic convertor unit, the input side of which can be coupled to an AC voltage source, a first DC voltage circuit, the input side of which is coupled to the electromagnetic converter unit and the output side of which can be coupled to a first electrical DC voltage sink, and which is designed to provide a first DC voltage on the output side, and a second DC voltage circuit, the input side of which is coupled to the electromagnetic converter unit and the output side of which can be coupled to a second electrical DC voltage sink, and which is designed to provide a second DC voltage on the output side, wherein one of the DC voltage circuits has a DC voltage converter for the purpose of adjusting its output-side DC voltage.

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Stuttgart, Germany

Calin Purcarea