Robert Boschgmbh

Daniel Raichle

Daniel Zirkel

Gunther Goetting

Edwin Eberlein

Mark Damson

Martin Eisenhardt

Tino Merkel

Michael Ungermann

Benjamin Lechner

Dragan Mikulec

Torsten Heidrich

Andreas Schoenknecht

Thomas Knorpp

Stefan Blind

Martin Wirth

Alexander Scheidle

Markus Michels

Manfred Kirschner

Martin Trunk

Jochen Kuehner

Roland Schleser

Tim Bruckhaus

Albrecht Schwarz

Beqir Pushkolli

Manfred Stahl

Klaus-Juergen Wald

Mercedes Herranz Gracia

Dimitrios Stavrianos

Michael Ruffer

Ekard Grossmann

Thomas Wiecha

Stephan Hanel

Stefan Spannhake

Kay Hindorf

Volker Gilgenbach

Mario Beyer

Yves Challand

Markus Merten

Thomas Merkel

Philip Fankhauser

Stefan Kolmorgen

The present invention relates to establishing a rotational speed-dependent safe operating mode. For this purpose, two redundant control paths are provided and are each designed to establish either an active short-circuit or a freewheeling mode as the safe operating mode. In this way, even if one control path fails, a rotational speed-dependent safe operating mode can still be fully established.

Control device for an inverter, electric drive system and method for establishing a safe operating mode

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 provides an apparatus and a method for checking the plausibility of an excitation signal. The apparatus is designed with: an input signal device () which is designed to provide an input signal () on the basis of the excitation signal (), the plausibility of which is to be checked; an amplitude estimation device () which is designed to determine an estimated amplitude value () for an amplitude of the excitation signal () on the basis of the input signal () provided; a phase angle estimation device () which is designed to determine an estimated phase angle value () for a phase angle of the excitation signal () on the basis of the input signal () provided; a diagnostic device () which is designed to generate a diagnostic signal () on the basis of at least the determined estimated amplitude value () and the determined estimated phase angle value (); and a plausibility-checking device () which is designed to check the plausibility of the excitation signal () on the basis of the diagnostic signal () depending on a predetermined range of values for the diagnostic signal ().

Apparatus and method for checking the plausibility of an excitation signal for a rotary encoder

The invention relates to a device and a method for testing the plausibility of signals of a rotary encoder. The device is formed with: a sine signal-providing device () designed to provide a sine signal () of the rotary encoder (); a cosine signal-providing device () designed to provide a cosine signal () of the rotary encoder (); a calculation device () designed to form a calculation signal () based on the sine signal () and the cosine signal (); a maximum value-determining device () designed to determine a maximum value of the calculation signal (); a minimum value-determining device () designed to determine a minimum value of the calculation signal (); a determining device () designed to determine a differential signal () as or based on a value of a difference between the determined maximum value and the determined minimum value, and which differential signal indicates an amplitude difference between an amplitude of the sine signal () and an amplitude of the cosine signal (); and a plausibility device () designed to test the plausibility of the sine signal () and the cosine signal (), in the event that the differential signal () falls within a predetermined region.

Device and method for testing the plausibility of signals of a rotary encoder

The present invention provides a control circuit () and a method for checking the plausibility of a rotor position angle. The control circuit is designed with: a rotor position angle determination device () for determining a first rotor position angle, &#x3c6;(t), at a first time, t, and at least one second rotor position angle, &#x3c6;(t), at a second time, &#x3c6;, before the first time, t; a computing device () for determining a rotor position angle,(t), to be expected at the first time, t, from a computational model of the computing device () using at least the second rotor position angle, &#x3c6;(t); and a plausibility-checking device () for outputting a signal () which indicates the determined first rotor position angle, &#x3c6;(t), as plausible if an amount of a difference between the rotor position angle,(t), to be expected and the determined first rotor position angle, &#x3c6;(t), does not exceed a predetermined threshold value.

Control circuit and method for checking the plausibility of a rotor position angle

A method for detecting an open line () of a receiver coil () of a resolver () comprises&#x2014;providing a pull-up resistor (R; R) and a pull-down resistor (R; R) at the terminals () on a control device () for the signal lines () of the receiver coil ();&#x2014;measuring the voltage between the two signal line terminals () of the receiver coil at two sampling times provided symmetrically at the middle of the excitation period;&#x2014;calculating an offset value by calculating an average value that comprises the measured values measured at the two sampling times in an excitation period; and&#x2014;identifying an open line () if the offset value exceeds a threshold value.

Method and circuit for detecting an open line of the sine/cosine receiver coil of a resolver

The present invention relates to the determining of a sensor signal. For example, an enveloping waveform of the signal from a rotational angle sensor can be reconstructed for this purpose. To this end, a predefined number of successively sampled values of a signal from a rotational angle sensor are multiplied with the elements of a weighting vector. On the basis of a measurement vector weighted in this way, an enveloping waveform of a signal curve from a rotational angle sensor can then be determined and, therefrom, a phase angle can be calculated.

Method and device for determining a sensor signal

A method for detecting a short circuit to ground or to the operating voltage of a signal line () of a resolver () has the following steps: &#x2014;measuring the potential of the signal lines () of the receiver coil () with respect to ground at two sampling times (R and F) provided symmetrically at the middle of the excitation period; &#x2014;calculating an offset value for a signal line pair () by calculating the average value of the four measured values (U, U, Uand U) for the associated receiver coil (); and &#x2014;identifying a short circuit and the potential to which the short-circuited line is connected in that the offset value is compared to threshold values.

Method and circuit for detecting a short circuit of the sine or cosine receiver coil of a resolver

A method for detecting an open resolver exciter line () comprises the following steps: &#x2014;measuring the signal voltages Uand Uof the sine coil () and the cosine coil () of the resolver (); &#x2014;comparing the amplitude U+Uof the resolver signal to a first threshold value C; &#x2014;starting a diagnostic mode having the following steps if the amplitude U+Udoes not reach the first threshold value C; &#x2014;applying a constant voltage to the exciter line () via a series resistance () Rthat is large compared to the ohmic resistance of the exciter coil () R; &#x2014;measuring the voltage difference U(t) at the terminals () of the exciter line at a number of points in time tduring at least one excitation period; and &#x2014;determining the DC voltage component Uof the voltage difference U; &#x2014;determining that there is an open exciter line () if, during the excitation period, the DC voltage component Uis larger than a second threshold value C.

Method and circuit for detecting an open resolver exciter line

The invention provides a control circuit and a method for qualifying a fault for a synchronous machine. The control circuit () is designed with: a rotor position angle range determination device () which is designed to determine at least one rotor position angle range covered by a rotor of the synchronous machine; a diagnostic signal determination device () which is designed to determine at least one diagnostic signal value of a diagnostic signal which indicates a fault; a comparison device () which is designed to determine whether a predetermined diagnostic threshold () is exceeded by the at least one determined diagnostic signal value or a diagnostic signal value derived from the at least one diagnostic signal value; and a qualification device () which is designed to qualify the fault, which is indicated by the diagnostic signal, on the basis of the at least one covered rotor position angle range and the exceeding of the predetermined diagnostic threshold () by the diagnostic signal value or the derived diagnostic signal value.

Control circuit and method for qualifying a fault for a synchronous machine

A method for detecting a short circuit () of a resolver exciter line () comprising the steps of: measuring () the excitation voltage (U(t) for the resolver () at a number of points in time during each excitation period; determining () the amplitude of the excitation voltage; starting a diagnostic mode () having the following steps (bis) if the amplitude of the excitation voltage does not reach a first threshold value; retrieving () the time-dependent voltage curves U(t) of the first and the second exciter line (H;) with respect to ground at the number of points in time; calculating () the amplitudes and the offset values of the time-dependent voltage curves; identifying () the exciter line that has a short circuit by determining that the calculated amplitudes do not exceed a second threshold value; identifying () the potential to which the short-circuited line (H or L) can be connected by comparing the offset values to third threshold values.

Method and circuit for detecting a short circuit of a resolver exciter line to ground or to the operating voltage

The invention is a pulse-controlled inverter with one or more semiconductor switches and freewheeling diodes arranged in parallel to each semiconductor switch. The semiconductor switches are triggered only when the current does not flow through a freewheeling diode that is arranged in parallel to the semiconductor switch. This allows the number of triggering processes for the semiconductor switch to be reduced. The reduced number of triggering processes for the semiconductor switches results in lower power losses and an increased service life of the entire system.

Power converter and method for operating a power converter to minimize a number of triggering processes of a semiconductor switch

The invention relates to a method and a device for operating a drive train () of a hybrid vehicle comprising an electrical system (), the drive train () having at least one vehicle drive wheel () in addition to one first electrical machine () and the first electrical machine () being connected to the electrical system (). According to the invention, in order to stabilize the voltage of the electrical system (), the first electrical machine () is operated without being coupled to the drive wheels () of the hybrid vehicle.

Method and device for operating a drive train of a hybrid vehicle

The present invention provides a device and a method for changing the operating state of an electric machine to the free-wheeling mode, in which significant excessive increases in voltage can be avoided. In the freewheeling mode, the individual phase connections of an electric machine are disconnected electrically from one another in order to change the electric machine into a safe operating state. According to the invention, only some of the phase currents of the electric machine are evaluated. On the basis of the evaluated phase currents, suitable times for the disconnection of all the phase connections are determined, that is to say even for the phases in which no evaluation of the phase currents takes place.

Method for changing an operating state of an electric machine and device for changing the operating state of an electric machine

The invention relates to an operating state circuit for actuating an inverter (), which supplies an n-phase electrical machine () with an n-phase supply voltage via phase connections (), wherein n&#x2267;1, comprising an evaluation device () which is connected to the phase connections () of the inverter () and which is configured to detect output voltages of the inverter () to the phase connections () and to determine a speed of the electrical machine () on the basis of the detected output voltages, and an actuating device () which is coupled to the evaluation device () and which is configured to switch to an idle state or an active short-circuit in dependence on the determined speed of the inverter ().

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Vaihingen, Germany

Daniel Raichle