Robert Boschgmbh

Tim Bruckhaus

Tobias Richter

Daniel Raichle

Edwin Eberlein

Daniel Zirkel

Michael Ungermann

Martin Trunk

Benjamin Lechner

Andreas Schoenknecht

Peter Sinn

Calin Purcarea

Matthias Boesing

Daniel Schweiker

Julia Roessler

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 providing an electrical voltage for exciting an excitation coil of a resolver (). In this case, the electrical voltage for exciting the excitation coil of the resolver () can be generated by means of pulse-width-modulated driving of at least one half-bridge (H). In this case, the switching elements of the half-bridge (H) are fully turned on, with the result that losses such as occur during linear operation of semiconductor switches, for example, can be avoided. If appropriate, the voltage (U_e) provided by the half-bridge (H) can be additionally increased by means of suitable resonant circuits (L, C, C. . . ).

Device for exciting a resolver, and resolver arrangement

The invention relates to a protection for a semi-conductor switch against over voltages. A capacitive element is provided on an inlet connection of the semi-conductor switch. The load amount, which flows into said capacitive element, is integrated in order to trigger a protection function when a threshold value is exceeded.

Protection device and control circuit for a semiconductor switch and method for controlling a semiconductor switch

The invention relates to a control unit () for evaluating the sensor signal of a sensor (), comprising at least one first sensor connection () and a second sensor connection () for connecting the sensor (), wherein the second sensor connection () is connected to a short-circuit protection circuit (), which is arranged between the second sensor connection () and a grounding (), and which comprises a switchable transistor (), by way of which the grounding () of the second sensor connection () can be interrupted.

Control unit comprising a circuit, and method for short-circuit protection of ground lines and sensors

The present invention relates to a double analysis of signals emitted by a rotational angle sensor. For this purpose, the signal emitted by the rotational angle sensor is processed in a first signal path with respect to a maximum angle quality of the angle signal to be calculated. A second signal path for processing the signal emitted by the rotational angle sensor is optimized to indicate a maximum diagnosability of errors.

Apparatuses and methods for evaluating a signal emitted by a rotational angle sensor

The present invention discloses a signal processing device for processing a differential signal from a sensor at a prescribed signal frequency, having a positive signal input (-), which is couplable to a positive sensor output of the sensor, and a negative signal input (-), which is couplable to a negative sensor output of the sensor, having a positive signal output (-) and having a negative signal output (-), having a first frequency-dependent resistance (CH) between the positive signal input (-) and the positive signal output (-) and having a second frequency-dependent resistance (CL) between the negative signal input (-) and the negative signal output (-), wherein the first and second frequency-dependent resistances (CH, CL) are designed to allow electrical signals at the prescribed signal frequency to pass in approximately unattenuated fashion, having a first voltage divider (), which is arranged at least in part in parallel with the first frequency-dependent resistance (CH) and is designed to divide a voltage between the positive signal input (-) and the positive signal output (-) using a prescribed ratio, having a second voltage divider (), which is arranged at least in part in parallel with the second frequency-dependent resistance (CL) and is designed to divide a voltage between the negative signal input (-) and the negative signal output (-) using a prescribed ratio. Further, the present invention discloses a control device for an electric machine.

Signal processing device and control device

The invention relates to a control device () for actuating a pulse-controlled converter of an electric drive system, having: an open-loop/closed-loop control circuit (a) which is configured to generate pulse-width-modulated actuation signals for switching devices of the pulse-controlled converter; a fault logic circuit (b) which can detect fault states in the drive system and which is configured to select a switching state or a sequence of switching states for the switching devices of the pulse-controlled converter which are assigned to the corresponding fault state; and a protection circuit (c) which is embodied in hardware and which comprises a signal delay device (), which is configured to delay the actuation signals in order to implement a minimum protection time, and a locking device (a,b) which is configured to lock two complementary switching devices of a bridge branch of the pulse-controlled converter with respect to one another.

Method and control device for protection time setting in an electric drive system

A method for dealing with faults in an electrical drive system having an electrical machine and a pulse-controlled inverter which has a first and a second supply connection, the method including the steps of: detecting a first fault in the electrical drive system; selecting a first of a large number of circuit states () of the pulse-controlled inverter according to the detected first fault; and driving the pulse-controlled inverter to set the first circuit state (), with the circuit states () including a short circuit () between the power connections of the electrical machine and the first supply connection, a short circuit () between the power connections of the electrical machine and the second power connection, and a free-running mode ().

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Asperg, Germany

Tim Bruckhaus