Robert Boschgmbh

Martin Trunk

Jochen Kuehner

Daniel Raichle

Rene Schenk

Manfred Ackermann

Edwin Eberlein

Dragan Mikulec

Klaus Rechberger

Andreas Schoenknecht

Tim Bruckhaus

Arnold Winter

Albrecht Schwarz

Marcus Rosenberger

Manfred Stahl

Timo Bartsch

Guenter Gschwantner

Julia Roessler

Alexander Becker

The invention relates to a device for activating a control unit in a second electrical network, starting from a first electrical network in a vehicle having an electrified drive train, the first electrical network being galvanically isolated from the second electrical network, the device comprising: a signal generating module for generating a wake-up signal in the first electrical network; a transformer which is designed to transmit the wake-up signal and electrical power from a first transformer winding on the first electrical network to a second transformer winding on the second electrical network, a rectifier circuit in the second electrical network, which circuit is connected to the second transformer winding and is designed to rectify the transmitted wake-up signal, and a switching element in the second electrical network, which element is connected to the rectifier circuit and is designed to activate a control unit () when the rectified wake-up signal is present or absent at an input of the switching element ().

Wake-up process for electrical networks in a vehicle having an electrical drive train

The invention relates to a circuit assembly () for fault detection in an ungrounded high-voltage system () having a connected inverter () and having at least one resistor () between a high-voltage potential () of the high-voltage system () and a reference potential (), the circuit assembly () comprising: a sensing circuit (), which is designed to tap a voltage from the resistor (), to generate a first measurement value therefrom and to provide the first measurement value at an output (); and an evaluation device (), which is connected to the output () of the sensing circuit (), the evaluation device () being designed to compare the first measurement value with a first limit value and to output a first signal if the first measurement value exceeds the first limit value.

Circuit assembly for fault detection in an ungrounded high-voltage system

A temperature sensor circuit () for measuring a temperature, comprising a measuring resistor () and a controllable voltage source () or current source () which is connected to the measuring resistor () and by means of which an input voltage can be applied to the measuring resistor (). The input voltage can be adjusted continuously by the controllable voltage source ().

Temperature sensor circuit

The invention relates to the discharging of a DC link capacitor in an inverter arrangement, thereby allowing, for example, a DC link capacitor to be discharged while an electric machine that is connected to the inverters can operate in an idling mode as a safe mode. The DC link capacitor is discharged by very briefly triggering a semiconductor switch within the inverter. According to the invention, the inverter bridge arm with the smallest phase voltage is selected for the very brief triggering process.

Inverter arrangement, electric drive system, and method for discharging a DC link capacitor in an inverter arrangement

The invention relates to an on-board electrical system supply system (), having a DC/DC converter () with at least one semiconductor rectifier element (), having two supply connections () for an on-board electrical system, which supply connections are connected at the output end to the DC/DC converter (), having an isolating switch () which is coupled between one of the supply connections () and the DC/DC converter (), and having an on-board electrical system isolating circuit () which is designed to determine a reverse voltage (U, Ua, Ub) across at least one of the semiconductor rectifier elements (), and to actuate the isolating switch (), in order to decouple the on-board electrical system from the DC/DC converter (), depending on a value of the determined reverse voltage (U, Ua, Ub).

On-board electrical system isolating circuit for DC/DC converters, and method for isolating an on-board electrical system from a DC/DC converter

A method for discharging a high-voltage system in a vehicle, the high-voltage system having at least one energy store and a plurality of high-voltage consumers. To discharge the high-voltage system, the electrical energy store is first separated from the rest of the vehicle electrical system, and at least one of the high-voltage consumers is switched on, so that the charge stored within the system drains via the consumers.

Method and device for discharging a high-voltage system

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

The present invention provides compensation of rapid fluctuations in voltage in a DC-to-DC converter. For this, the primary side of the DC-to-DC converter is monitored by means of capacitive voltage dividers. A voltage fluctuation occurring in the process can be identified early and thereupon the DC-to-DC converter can be controlled correspondingly to counteract this.

Apparatus for regulating an energy system and method for operating an energy system

A method for fault recognition in an electric machine controlled by an inverter in a motor vehicle, in which the phase currents of the electric machine are ascertained, in particular ascertained by measuring, and a fault is recognized if at least one of the phase currents or a variable derived therefrom, exceeds a predefined upper threshold value, the upper threshold value being established as a function of operating parameters of the motor vehicle, in particular of the electric machine and/or of the inverter.

Method for fault recognition in an electric machine controlled by an inverter in a motor vehicle and device for monitoring an operation of the electric machine

An inverter system for operating an electric motor includes an input port for providing an electrical voltage, a bridge inverter circuit connected downstream from the input port for generating an electrical alternating voltage for the electric motor based on the electrical voltage. The bridge inverter circuit has at least one half-bridge branch including switching elements configured to be open for transferring the electric motor into a freewheeling state, and a decoupling switching element designed for decoupling the at least one half-bridge branch in the freewheeling state of the electric motor from the input port, in order to suppress a reaction of the freewheeling electric motor on the input port.

Inverter system for operating an electric motor

A method for shutting down an electric machine having a pulse-controlled inverter in the event of a malfunction. Undesirable side effects during shut-down of the electric machine may be minimized and the regular machine operation may be maximized when the electric machine is first switched to a disconnect mode in which all switches of the pulse-controlled inverter are open and subsequently is switched to a short-circuit mode in which the switches connected to the high potential are open and the switches connected to the low potential are closed.

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Moeglingen, Germany

Martin Trunk