Robert Boschgmbh

Georg Schulze-Icking-Konert

Norbert Knab

Michael Mueller

Nikolas Haberl

Thomas Mohr

Stefan Kotthaus

Stefan Stampfer

Michael Forscht

Frank Fischer

Michael Rummel

Matthias Jacob

Daniel Seebacher

Peilei Chen

Reinhard Stawinski

A device () for activating an electrical consumer () includes a controllable current source () for providing a control current, a switching unit () for controlling a consumer current as a function of the control current, and a sampling unit () for determining a time delay between an activation of the current source () and the enabling or interruption of the current flow by the switching unit (). Furthermore, a processing unit () is provided, which is configured to determine that the current source () is defective if the time delay lies outside a predetermined range.

Activation of an electrical consumer

A drive device comprising at least one control unit () for operating a first drive unit () with a first operating frequency (f) from a first operating frequency interval and a second drive unit () with a second operating frequency (f) from a second operating frequency interval, which at least partly overlaps the first operating frequency interval. The control unit (), in at least one operating state, operates the drive units at least occasionally simultaneously with different operating frequencies (f, f) and varies the first operating frequency (f) and/or the second operating frequency (f) within the respective operating frequency interval.

Drive device and method for operating a drive device

A half-bridge includes a first switching device for connecting a terminal to a first potential, and a second switching device for connecting the terminal to a second potential. A method according to the present invention for controlling the half-bridge includes the steps of outputting a closing signal for the first switching device while the second switching device is open, and of ascertaining a latency period between the start of the closing signal and a collapse of a voltage applied across the first switching device. Subsequently, a dead time that lies between an opening of the second switching device and a closing of the first switching device is minimized on the basis of the ascertained latency period.

Control of a half-bridge

The invention relates to a method for monitoring a half bridge branch () in a half bridge (), said half bridge branch () being connected in series with another half bridge branch () in the half bridge () via a center tap (), including the steps of: &#x2014;applying an electric supply potential () opposite the center tap () at the other half bridge branch () to the center tap () according to a predefined time curve (); and &#x2014;monitoring the half bridge branch () on the basis of a comparison () of the predefined time curve () and an electrical output potential () at the center tap ().

Method for monitoring a half bridge branch in a half bridge

The invention relates to a power output stage (), in particular for a controller of an electrical machine () for a motor vehicle, comprising at least one control unit () and comprising at least four semiconductor switches (HS, HS, LS, LS) which can be individually actuated by the control unit () and which are connected to at least two half-bridges () for operating the electrical machine () in order to form a bridge circuit (), and are connected to a supply line () and an earth line () of the power output stage (). Provision is made for the control unit () to have a controllable first pull-up apparatus (PU) and a controllable first pull-down apparatus (PD) for a first of the half-bridges () and a controllable second pull-up apparatus (PU) and a controllable second pull-down apparatus (PD) for a second of the half-bridges (), the control unit () actuating the semiconductor switches (HS, HS, LS, LS) the pull-up apparatuses (PU, PU) and the pull-down apparatuses (PD, PD) in a short-circuit test mode in order to detect a short-circuit current.

Power output stage, method for operation

A fuse () is proposed for interrupting a voltage and/or current-carrying conductor () in case of a thermal fault, having a conductor bar () ensuring an electrically conductive connection of the voltage and/or current-carrying conductor during correct operation, said fuse () being characterized in that the conductor bar () melts upon an increase in temperature above the melting point, and the electrically conductive connection of the voltage and/or current-carrying conductor is interrupted due to inherent surface tension. Also proposed is a method for producing the fuse () according to the invention.

Fuse for interrupting a voltage and/or current-carrying conductor in case of a thermal fault and method for producing the fuse

The invention relates to a thermal fuse in a circuit structure, particularly a punched grid, having a plurality of circuit areas, having the circuit structure with connections sites () and having a fusible element (), which is electrically and mechanically connected to the connection sites () of the circuit structure, a material of the fusible element () having a melting point, in order to melt at an ambient temperature greater than the melting point, such that material of the fusible element () collects at the connection sites () and the electrical connection formed by the fusible element () breaks.

Growing community of inventors

Buehlertal, Germany

Georg Schulze-Icking-Konert