Robert Boschgmbh

Andreas Schoenknecht

Daniel Raichle

Michele Hirsch

Boris Adam

Norbert Schneider

Edwin Eberlein

Martin Trunk

Adolf Dillmann

Tim Bruckhaus

Stefan Huehner

Peter Sinn

Hartmut Sparka

Axel Haas

Thomas Suenner

Julia Roessler

Christian Kluthe

Irfan Aydogmus

Oliver Messner

The invention relates to a control unit () for driving an electric load, in particular an electric machine, having a first and a second voltage terminal () in order to supply the control unit () with electrical energy, a capacitor (), which is connected between the voltage terminals (), at least one half-bridge (), which is connected between the voltage terminals (), wherein the half-bridge () has two controllable switches (), between which there is formed a half-bridge tap () for connecting the load, a safety circuit (), which is designed to close one of the controllable switches () of the half-bridge () in the event of a fault, a discharge circuit (), which is designed to connect the voltage terminals () electrically in the event of a fault, and having a control circuit () which is designed to provide a control signal () which triggers the safety circuit () and the discharge circuit () in the event of the detected fault.

Control unit

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 ().

Operating state circuit for inverter and method for setting operating states of an inverter

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 invention relates to a control device for triggering a semi-conductor switch of an inverter, the control device comprising: a switching signal amplification device, which is designed to amplify a switching signal generated by a control regulation of the inverter, and to generate a first switching control signal that triggers the semi-conductor switch in a switching mode; a current regulation device, which is coupled to a current sensor output of the semiconductor switch and is designed to generate a second switching control signal that triggers the semi-conductor switch in a linear mode; and a selection device, which is coupled to the switching signal amplification device and the current regulation device and is designed to output, on the basis of at least one mode selection signal, either the first switching control signal or the second switching control signal in order to trigger a control terminal of the semi-conductor switch.

Method and device for discharging an inverter capacitor

A circuit system having at least two inverter modules connected in parallel, each of which includes an inverter circuit having power semiconductor circuit breakers and a gate driver circuit for controlling the power semiconductor circuit breakers; the gate driver circuit of a first inverter module includes a signal transmission circuit via which a control signal is transmittable from a low-voltage side to a high-voltage side, and a first driver output terminal which is electrically connected to the first driver input terminals of the gate driver circuits of the inverter modules connected in parallel, and via which the high-voltage side control signal or a control signal deduced therefrom is transmittable to the gate driver circuits of the inverter modules connected in parallel. The power semiconductor circuit breakers of the inverter circuits of the inverter modules, connected in parallel to the first inverter module, are controlled based on the transmitted control signal.

Circuit system having at least two inverter modules connected in parallel, method for connecting at least two inverter modules in parallel and circuit substrate for a gate driver circuit of an inverter module

The invention relates to a control device () for the actuation of a semiconductor switch () on an inverter having an actuation switch () that is designed to generate a driver signal () depending on a switch signal () generated by a control regulation of the inverter, and a driver circuit () that is connected between the actuation circuit () and a control input () of the semiconductor switch (), and which is designed to receive the driver signal () and a control signal () depending on the driver signal (), said control signal actuating a semiconductor switch () for the generation and infeed into the control input () of the semiconductor switch (), wherein the actuation circuit () is designed to generate the driver signal () as a consequence of driver signal pulses with a predetermined and adjustable pulse length such that the semiconductor switch () is not fully conductive in the event of an actuation with the control signal () during the pulse length.

Control device for semiconductor switch on an inverter and method for the actuation of an inverter

A control apparatus for driving a semiconductor switch of an inverter. A drive circuit generates a driver signal on the basis of a switching signal generated by a control regulation system of the inverter. A driver circuit which is coupled between the drive circuit and a control input of the semiconductor switch is configured to receive the driver signal and to generate, on the basis of the driver signal, a control signal which drives the semiconductor switch. The control signal is fed into the control input of the semiconductor switch. A regulation circuit is coupled to the drive circuit and is configured to detect a voltage signal dependent on the voltage across the semiconductor switch, to generate a regulation signal which is dependent on the voltage signal and is intended to regulate the driver signal, and to feed the regulation signal into the drive circuit.

Control apparatus for semiconductor switches of an inverter, and method for driving an inverter

The invention relates to an operating state circuit for driving an inverter with half-bridges having respective switching devices, which inverter supplies an n-phase supply voltage to an n-phase electrical machine via phase connections associated with the respective half-bridges, where n&#x2267;1. The operating state circuit comprises an evaluation device, which is connected to the phase connections of the inverter and to input connections of the inverter and is designed to detect an input voltage of the inverter and phase currents at the phase connections of the inverter, and a drive device which is coupled to the evaluation device and is designed to switch the inverter from a short-circuit state to a freewheeling mode on the basis of the detected input voltage, wherein the evaluation device is designed to generate a freewheeling trigger signal and to output said signal to the drive device if the detected input voltage is lower than an adjustable freewheeling threshold value, and wherein the drive device is designed to change the respective switching devices of the half-bridges to an open state after receiving the freewheeling trigger signal only when the particular phase current detected at the associated phase connection has a zero crossing or a current direction coming from the inverter.

Operating state circuit for an inverter and method for setting operating states of an inverter

An inverter for an electric machine, and a method for operating the inverter, has at least one output stage unit for producing a connection between the electric machine and a power supply network, a control unit for controlling the output stage unit, a supply unit independent of the power supply network for power supply of the output stage unit, at least one emergency operation control assigned to the output stage unit for controlling the output stage unit such that switching elements are switched into a short circuit operation, at least one emergency operation supply assigned to the output stage unit for generating a power supply from the power supply network, and a coordination control, which activates or deactivates the emergency operation control as a function of a status signal of the independent supply unit and a standby signal of the control unit.

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Renningen, Germany

Andreas Schoenknecht