Audi Ag

Daniel Ruppert

Andreas Apelsmeier

Benjamin Söhnle

An exciter circuit for an externally excited synchronous machine, wherein the exciter circuit comprises power supply terminals connectable to a current source, exciter current terminals connectable to a rotor winding of a rotor of the synchronous machine, and a protection circuit which, in operation, connects conductively the power supply terminals when a triggering condition is fulfilled.

Exciter circuit for an externally excited synchronous machine and motor vehicle

An exciter circuit for an externally excited synchronous machine, including voltage supply terminals for a voltage supply, exciter current terminals to be connected to an exciter winding of the synchronous machine, a bridge circuit hooked up to the voltage supply terminals, a controller and a protective layout at the side with the exciter current terminals, including: a semiconductor switch switched in series with the exciter winding, and in parallel with a protective diode which is blocking in an exciter current flow direction, and a cut-off voltage decay path running in parallel with the exciter winding and having a connection point between the bridge circuit and the semiconductor switch, having at least one Zener diode layout which is blocking in the exciter current flow direction, which defines a breakdown voltage and includes at least one Zener diode. The controller opens the semiconductor switch when a rapid de-exciting signal is present.

Exciter circuit for an externally excited synchronous machine, motor vehicle, and method for de-exciting an exciter winding

A motor vehicle, having an externally excited synchronous machine and an inverter associated with the synchronous machine and connected to a high-voltage network and an exciter circuit associated with the synchronous machine to energize an exciter winding of the synchronous machine, comprising a power electronics layout having at least one intermediate circuit capacitor at the high-voltage network side, wherein the motor vehicle comprises a cooling device for cooling the power electronics layout and a voltage surge protection circuit is associated with the intermediate circuit capacitor, comprising at least one varistor, which becomes electrically conducting by the voltage imposed on it when a voltage threshold value is exceeded, wherein at least the one varistor of the voltage surge protection circuit forms part of an exciter module comprising the exciter circuit and a housing, which is thermally coupled to a cooling element of the cooling device for cooling the exciter module.

Motor vehicle having an externally excited synchronous machine

A power electronics arrangement for a motor vehicle comprises at least one power electronics circuit having at least one temporary storage for electrical energy, a discharge circuit associated with the power electronics circuit for discharging the temporary storage, having a discharge resistance, and a cooling device for cooling the power electronics arrangement, wherein the cooling device comprises a metallic cooling sink, the cooling sink being covered at least partly by an electrically insulating insulator layer, on which the discharge resistance is arranged as a conductor track.

Power electronics arrangement for a motor vehicle and method for production of a power electronics arrangement for a motor vehicle

An electrical switching device for operating an electrical machine comprises an inverter circuit, an exciter circuit and a cooling device, wherein the exciter circuit is formed by at least one circuit module, wherein the circuit module is thermally coupled to the cooling device and comprises a discharge circuit, connected to the inverter circuit and adapted to discharge at least one energy accumulator of the inverter circuit.

Electrical switching device, electrical drive layout and motor vehicle

A method for operating an electrical circuit comprising at least one switching element of a motor vehicle is disclosed, wherein the switching element has a control voltage applied to it by a control device and the switching element is switched by the control voltage, wherein during at least one switching process there is determined at least one voltage measurement value describing a voltage of a Miller plateau of the control voltage and/or at least one time measurement value describing a duration of the Miller plateau, wherein the voltage measurement value and/or the time measurement value is compared respectively to at least one associated limit value and upon exceeding at least one limit value the control device initiates at least one action associated with the exceeded limit value.

Method for operating an electrical circuit comprising at least one switching element of a motor vehicle, and a motor vehicle

The disclosure relates to a motor vehicle that includes an externally excited synchronous machine, an exciter circuit which, in operation, energizes an exciter winding of the externally excited synchronous machine, a power electronics layout connected to a voltage network and including at least one capacitor, wherein the exciter circuit includes at least one semiconductor switch in a discharge section that connects terminals of the voltage network other than the exciter winding, and a control device which, in operation, closes the at least one semiconductor switch of the discharge section of the exciter circuit to actively discharge the at least one capacitor.

Motor vehicle having an externally excited synchronous machine and method for active discharging of a capacitor in a high-voltage network

A method for actively discharging an electrical energy storage device by means of an electrical circuit arrangement which comprises at least one half bridge comprising two switching elements, wherein the half bridge is connected in parallel with the energy storage device and wherein the switching elements each have a switchable section, the electrical resistance of which can be set in a transmission mode of the switching element by means of a control voltage of the switching element, wherein, in order to discharge the energy storage device, the level of the control voltages of the switchable sections of the switching elements in transmission mode and/or the ratio between a switched-on duration in which the switchable sections of the switching elements are operated in transmission mode during the discharge, and a switched-off duration in which the switchable sections of the switching elements are operated in a blocking mode during the discharge can be set as a function of a discharge current specification describing the level of a discharge current of the energy storage device.

Method for actively discharging an electrical energy storage device, control device, electrical circuit device and motor vehicle

An electrical circuit device comprises at least one first power electronics module, at least one second power electronics module, a circuit board and a supporting structure, wherein the power electronics modules each lie by a contact side against an associated contact surface of the supporting structure and have one or more terminal pins connected to the circuit board on and/or next to a connection side situated opposite the contact side, wherein the first power electronics module has a lesser thickness between the contact side and the connection side than the second power electronics module, wherein the contact surface against which the contact side of the first power electronics module bears has a lesser distance from the circuit board than the contact surface against which the contact side of the second power electronics module bears, and/or wherein the terminal pins of the first power electronics module are longer than the terminal pins of the second power electronics module.

Electrical circuit device, electrical drive device and motor vehicle

The present disclosure relates to an on-board electrical network for a motor vehicle. The motor vehicle comprises a battery cell unit configured as a so-called SmartCell. The on-board electrical network also comprises a controller for operating the battery cell unit. In order to be able to be supplied with electric energy, the controller comprises a supply connection for supplying a supply voltage. The supply voltage is usually supplied by an energy supply device of the on-board electrical network, which is coupled to the controller via a first connection line. In order to allow for a redundant energy supply for the controller, a second connection line is provided in addition to the first connection line, via which a battery cell of the respective battery cell unit is coupled to the supply connection. The supply voltage can thus be supplied either via the first connection line or via the second connection line on the basis of an operating state of the energy supply device.

On-board power system for a motor vehicle, and method for operating an on-board power system

Power electronics arrangement including a printed circuit board and at least one power module fastened on the printed circuit board, which has one or more electronic components potted by a potting compound. At least one module connecting point of the power module is electrically contacted with at least one board connecting point of the printed circuit board by an electrically conductive pin. A base section of the pin is fastened on the module connecting point or on the board connecting point, and the end of the pin opposite to the base section is pressed in the installation position into a contacting opening assigned or assignable to the respective other connecting point.

Power electronics unit comprising a circuit board and a power module, method for producing a power electronics unit, motor vehicle comprising a power electronics unit

A half-bridge module having two switching units, each of which includes multiple transistors connected in parallel and/or in series, in particular IGBTs or MOSFETs. The transistors are arranged on a first substrate. The half-bridge module has a temperature sensor matrix having a plurality of temperature sensors, and the temperature sensors are thermally connected to the transistors at least in some regions. A temperature sensor matrix is also provided.

Half-bridge module with precise temperature detection

An arrangement which has at least one semiconductor module made of silicon carbide, a driver circuit for the at least one semiconductor module, and a cooling system, wherein the at least one semiconductor module and the driver circuit are arranged adjacent to one another, wherein the driver circuit is connected to the cooling system.

Arrangement for electronic components

A converter with a half bridge circuit with at least one active half bridge branch, of which the phase connection in each case is connected via a respective switching device to a respective reference potential. A control device of the converter is configured to alternatingly conductively and non-conductively switch the respective switching device. The first and second switching device in each case includes a parallel connection of at least one transistor of a first type and at least one transistor of a second type.

Converter, motor vehicle and method for controlling a half bridge circuit

A power module for electric drives is provided which comprises at least one exciter circuit with at least one power semiconductor, wherein the power module is molded and the exciter circuit with the at least one power semiconductor is integrated in the molded power module. A traction inverter is also provided which comprises a water-cooled main cooler, wherein the main cooler comprises a bearing surface which is configured to receive power modules, wherein the traction inverter comprises at least one molded power module, and wherein the main cooler forms a cooling connection which is configured to receive the molded power module on the main cooler.

Growing community of inventors

Lenting, Germany

Daniel Ruppert