Robert Boschgmbh

Stefan Aldinger

Tobias Richter

Stefan Butzmann

Joerg Koniakowsky

Jochen Kilb

A DC-DC converter system (') according to the invention is provided with an input (In) for feeding in an input voltage (U_in), a step-up controller section () for increasing the input voltage (U_in) in a controlled manner to a controlled first output voltage (U_out) and for providing the first output voltage (U_out) at a first supply output (Out), and a voltage conversion section () for converting the input voltage (U_in) into a second output voltage (U_out) in a manner controlled by a control device of the step-up controller section () and for providing the second output voltage (U_out) at a second supply output (Out). The DC-DC converter system () according to the invention having two supply outputs (Out, Out) is based on an expansion of a step-up controller with a SEPIC circuit, wherein the DC-DC converter system comprises only a single control device (S) and a switching device (T) which can be controlled by the control device.

DC-DC converter system, DC voltage supply system and printed circuit board for a DC-DC converter system

The invention relates to a method for operating an electric circuit arrangement () which has a low-voltage sub-network () and a high-voltage sub-network (). A test signal is transmitted from one of the sub-networks () to the other sub-network () in order to detect a fault depending on the reception of the signal in the other sub-network () and to switch the circuit arrangement () to a safe state. A data bus (), which connects a low-voltage control unit () of the low-voltage sub-network () to a high-voltage control unit () of the high-voltage sub-network (), is operated with a maximum bus load at least temporarily as a test signal so that data packets are transmitted at fixed time intervals, and a fault is detected depending on a delay of the last received data packet, said delay being detected by the control unit () receiving the data packets.

Method and device for operating a circuit arrangement, circuit arrangement

The invention relates to a device and to a method for determining a voltage. The voltage to be determined is a direct voltage at the input of a flyback converter. The flyback converter comprises at least a flyback-converter transformer and a switching element on the primary side of the flyback-converter transformer. In order to determine the voltage at the input of the flyback converter, a voltage on the secondary side of the flyback-converter transformer is sensed and evaluated in correlation with the switching state of the switching element on the primary side.

Device and method for determining a voltage

The invention relates to a circuit arrangement (), in particular for controlling an electric machine, comprising at least one high-voltage semiconductor bridge circuit () that includes a low-side semiconductor switch () and a high-side semiconductor switch (). A high-side gate driver () is assigned to the high-side semiconductor switch (), and a low-side gate driver () is assigned to the low-side semiconductor switch (). According to the invention, a high-side flyback converter () is connected upstream of the high-side gate driver, and a low-side flyback converter () is connected upstream of the low-side gate driver (), at least one of the flyback converters () being designed as a high-voltage flyback converter.

Circuit arrangement

A circuit arrangement () for operating an electric machine. The circuit arrangement () includes at least one high-voltage half-bridge circuit (), which has a high-side semiconductor switch () and a low-side semiconductor switch (). In each case one gate driver () is assigned to the semiconductor switches () for actuating said semiconductor switches, and includes a low-voltage controller (), which actuates the gate drivers (). A high-voltage controller () senses output signals (AS) of the gate drivers () and transmits at least the sensed output signals (AS) to the low-voltage controller () using a data bus ().

Circuit arrangement and operating method

A system, comprising a control regulation system, an inverter, a DC link capacitor, which is coupled to input connections of the inverter, at least one control apparatus, which is coupled to semiconductor switches of a half-bridge of the inverter, wherein the control apparatus is configured to actuate the semiconductor switch on the basis of a control signal from the control regulation system, at least one temperature sensor, which is configured to determine a change in temperature of the semiconductor switches in the half-bridge of the inverter, and a voltage sensor, which is configured to determine the voltage at the DC link capacitor is disclosed.

Growing community of inventors

Bad Wimpfen, Germany

Stefan Aldinger