Abstract: 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.

Abstract: 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.

Abstract: An externally excited synchronous machine is provided having a stator and a rotor rotatable relative to the stator, wherein the rotor has an exciter winding for providing a rotor field during operation of the synchronous machine, wherein the synchronous machine has an inductive transmission system for wirelessly transmitting electrical power to the exciter winding for operating the exciter winding, wherein the synchronous machine further has a capacitive transmission arrangement with a fixed first transmission device or means and a second transmission device or means opposite the first transmission device or means and arranged on an end face of the rotor for data transmission between a rotor-external control device of the externally excited synchronous machine and a rotor-side control unit. A motor vehicle and a method for operating the externally excited synchronous machine is also provided.

Abstract: A method for producing a circuit arrangement for an electric machine is provided. The circuit arrangement has at least one power input which is connectable to an electric energy storage device, at least one power semiconductor which is arranged in a power semiconductor module, and at least one power output which is connectable to an excitation coil of the electric machine, wherein the power input is electrically connected to a first power terminal of the power semiconductor module via an intermediate circuit of the circuit arrangement, and the power output is electrically connected to a second power terminal of the power semiconductor module via a control board of the circuit arrangement. A power semiconductor module for a circuit arrangement for an electric machine, and to a corresponding circuit arrangement is also provided.

Abstract: 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.

Abstract: 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 desc

Abstract: A method for rapid de-excitation of a rotor of a separately excited synchronous machine of a motor vehicle, wherein the motor vehicle or the synchronous machine includes an excitation circuit with at least one transistor that controls a rotor current of the synchronous machine, wherein, in a normal mode of the motor vehicle or of the synchronous machine, the at least one transistor is operated in a switching mode in which the at least one transistor realizes an electronic switch, and wherein, in an emergency mode of the motor vehicle or of the synchronous machine, the at least one transistor is operated in a resistance mode in which the at least one transistor realizes a resistance that at least partially dissipates the rotor current.

Abstract: In an example, an optimized inverter switching arrangement to operate a system with an electric drive may include an inverter circuit as a two-level inverter, which couples an alternating signal connection and a direct signal connection of the switching arrangement to each other. The inverter circuit may include at least two phases, which are each equipped with first switching elements as a half bridge. At least one second switching element is associated with each of the phases to form a hybrid circuit. The first and second switching elements differ in their semiconductor technology. By a control circuit, the inverter circuit may be operated in a short circuit operation to perform an active short circuit in case of a fault. The control circuit may control the first and second switching elements such that the alternating signal connection is short-circuited by each phase.

Abstract: 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.

Abstract: An excitation circuit for energizing an excitation winding of an externally excited synchronous machine, the excitation circuit including an encapsulated assembly. The encapsulated assembly includes an electrical circuit having semiconductor switches via which, in operation, an excitation current is provided to excitation current connections of the encapsulated assembly. According to the disclosure, the encapsulated assembly additionally includes at least one gate driver which, in operation, drives the semiconductor switches.

Abstract: A pulse inverter and to a power module for such a pulse inverter. The power module has a hard encapsulation body in which the power module lug is embedded, which can be connected in a lap weld to a lug leading to a DC link capacitor. The power module lug is supported on its side, opposite the lug, on a load-bearing hard encapsulation material of the hard encapsulation body, which material acts as a counterholder in the welding process.

Abstract: A method for producing an electrical circuit device for operating an externally excited electric machine is provided and may comprise positioning and attaching at least one power module at a marked attachment position on an outside of a heat sink, positioning at least one exciter module on the outside of the heat sink, attaching the exciter module to the outside of the heat sink. The at least one power module may include power module-side connecting pins. The at least one exciter module may include exciter module-side connecting pins. During the positioning, at least one heat sink-side positioning section may be inserted into or may receive at least one exciter module-side positioning section. After attaching the power module and the exciter module to the heat sink, a control board may be plugged onto the power module-side and the excited module-side connecting pins pointing in the same direction.

Abstract: 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.

Abstract: Embodiments of the disclosure provide a system and method of operating a power tool. The method includes measuring a battery current draw, sampling the battery current draw to generate a plurality of battery current samples, calculating an averaged current value by averaging the plurality of battery current samples, and comparing the averaged current value with a predetermined current value. The method also includes determining a number of motor revolutions, comparing the number of motor revolutions to a startup threshold, and determining a cycle is complete and stopping the motor when the number of motor revolutions exceeds the startup threshold and the averaged current value is greater than the predetermined current value.

Abstract: A method for operating an inverter with a plurality of half bridges, each including two switching devices that connect respective bridge center points of the half bridges to DC voltage potentials, wherein switching takes place between different inverter states, wherein at least one of the switching devices has variable switching behavior and includes a parallel connection of two semiconductor switches that are configured differently from one another, wherein, for at least two temporally successive switching operations of the at least one of the switching devices from a conducting switching state to a blocking switching state, activating the semiconductor switches using first activation patterns, and/or, for at least two temporally successive switching operations of the at least one of the switching devices from the blocking switching state to the conducting switching state, activating the semiconductor switches using second activation patterns.

Abstract: A power electronic arrangement for an externally excited synchronous machine is disclosed and may comprise a heat sink, at least one inverter power module including an inverter and at least one exciter power module including an exciter circuit. The at least one inverter power module may be mounted in a predefined relative inverter position and orientation on the heat sink by material bonding The heat sink and the exciter power module may each include positioning devices configured to interlock such that a desired relative exciter power module position and orientation relative to the inverter power modules is produced by interlocking the positioning devices of the heat sink and the exciter power module.

Abstract: A power electronics arrangement for an externally excited synchronous machine, may include an inverter power module for each phase of the synchronous machine to form an inverter, an exciter power module including an exciter circuit as well as a common heat sink, to which the power modules are secured and thermally coupled for cooling. The heat sink may comprise a cavity including cooling structures for each inverter power module, each cooling structure being situated adjacent to a respective inverter power module. The cavity may receive a flow for active cooling of the power modules of a cooling fluid entering through an inflow opening of the heat sink to an outflow opening of the heat sink. A cooling structure may be associated with the exciter power module, the cooling structure being adjacent to the excited power module in the cavity.

Abstract: A power electronic arrangement for an electric machine, includes an inverter, power electronic components accommodated in at least one power module, an intermediate circuit connected to the inverter across connection contacts of the at least one power module and having at least one intermediate circuit energy accumulator, and a heat sink to which the at least one power module is thermally connected for cooling, the connection contacts are arranged at a margin and flat against a substrate carrying one or more power semiconductors, and are thermally coupled to the heat sink via the substrate, wherein the at least one intermediate circuit energy accumulator is connected electrically and thermally to the connection contacts to cool the at least one intermediate circuit energy accumulator.

Abstract: 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.

Abstract: 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.