Robert Boschgmbh

Stephan Binhack

Stefan Koch

Rene Schenk

Jochen Kurfiss

Thomas Knorpp

Michael Ruffer

Jian Tian

Ralf-Peter Bergmann

Stephan Mueller

Wolfgang Mollenkopf

Eric Hueckel

Florian Lieblang

Tobias Pristl

Michael Zeller

Ralf Bochat

An inverter has at least three phases for supplying current to an electrical machine. The inverter also has a control unit and at least one power output stage connected to the control unit on an input side. The control unit is configured to generate pulse-width-modulated control signals for activating the power output stage. The inverter further has a heat sink and, for each phase, an intermediate circuit capacitor and a semiconductor switch half bridge. The heat sink has a flat thermal contact surface. The thermal contact surface is connected in a thermally conductive manner to the control unit and to the semiconductor switch half bridges. The heat sink has a recess for each of the intermediate circuit capacitors, and the intermediate circuit capacitors are each arranged in one of the recesses in the heat sink.

Inverter for an electrical machine

The present invention relates to a voltage converter comprising a primary side which has a full bridge device which is configured for the purpose of receiving a first DC voltage from a voltage source at a first amplitude and to transmit same to a primary coil arranged in the primary side, comprising a control unit which is designed for the purpose of controlling the full bridge device using PWM signals having phases shifted counter to one another, wherein the control unit is configured to detect an asymmetry in the current supplied to the primary coil based on a current profile in the primary coil, wherein the control unit is designed to compensate for a detected asymmetry by adjusting the PWM signals. The present invention further relates to a corresponding method.

Suppression of a DC component in a transformer of a voltage converter

In a boost converter operation, a first voltage that is independent of an input voltage of the boost converter is preset in the boost converter, having an increased voltage level compared to the input voltage, as the setpoint output voltage, as long as the input voltage is below a first voltage threshold value, which is lower than the first voltage. As soon as the input voltage exceeds the first voltage threshold value, a second voltage that is a function of the input voltage is preset, having a lower voltage level compared to the input voltage, as the setpoint output voltage. As soon as the input voltage drops below a second voltage threshold value, which is lower than the first voltage, the first voltage is again preset as the setpoint output voltage.

Boost converter and method for its operation

The invention relates to an activation apparatus () for a galvanically decoupled direct voltage converter having a synchronous rectifier, comprising a signal generating device (), which is designed to generate control signals () for switch devices of the synchronous rectifier and a reference current signal (), a first comparator device (), which is coupled to the signal generating device (), and which is designed to detect the secondary-side output current (Jo) of the synchronous rectifier, compare it to the reference current signal () and generate a current control signal in dependence on the comparison, and a pulse width modulation device (), which is coupled to the signal generating device () and the first comparator device () and which is designed to generate pulse width modulated activation signals () for the switch devices of the synchronous rectifier on the basis of the control signals () and the current control signal, wherein the signal generating device () is furthermore designed to reduce the reference current signal () within a first predetermined timespan to a predetermined reference current threshold.

Activation apparatus and method for activating a direct voltage converter

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Knittlingen, Germany

Stephan Binhack