Abstract: A method for controlling the braking operation of a motor vehicle including at least one electric drive machine, which is switchable into a generator mode effectuating a deceleration of the motor vehicle, as well as a friction braking device having multiple friction brakes, each assigned to a wheel, having brake elements, which are movable toward a brake disc via an actuator. A first braking is performed using the drive machine switched into the generator mode until a first threshold value of the regenerative power or deceleration is reached, after which additionally required braking power is provided by the friction braking device, which is also actuated upon reaching the threshold value.

Abstract: A method for operating a motor vehicle having at least one electric machine, which is electrically coupled across a pulse inverter to a DC distribution bus of a high-voltage onboard network of the motor vehicle, includes, by means of a compensation unit electrically coupled to the DC distribution bus, feeding an electric compensation voltage to the DC distribution bus such that ripple of the electric DC voltage present in the DC distribution bus which is caused by the pulse inverter is at least partly compensated.

Abstract: A method for adding or removing a rotor having at least one permanent magnet of a permanently excited synchronous machine in a motor vehicle, which also includes a stator having one or more stator windings, wherein the permanently excited synchronous machine and a pulse inverter connected to the one or more stator windings form a motor arrangement, wherein upon adding or removing the rotor the stator windings are energized for generating a stator field acting against the permanent magnetic field generated by the permanent magnet of the rotor by the pulse inverter in a maintenance mode, such that the forces occurring between the stator and the rotor are reduced and/or at least partly canceled.

Abstract: A method for ascertaining a variable which relates to the state of a motor vehicle battery of a first motor vehicle and which indicates a count value in order to count a previously effective service life of the motor vehicle battery, and wherein a starting count value is provided in order to ascertain the count value and at least one parameter which influences the effective service life of the motor vehicle battery is detected. An estimated value for the influence of the at least one detected parameter on the effective service life of the motor vehicle battery is calculated on the basis of the at least one detected parameter, and the starting count value is increased to a current count value on the basis of the calculated estimated value.

Abstract: A method for control of an externally excited electric machine of a motor vehicle, wherein a current flow is generated and/or controlled in at least one exciter winding of the electric machine by way of a power module connected to the exciter winding, wherein a counter-voltage is generated by way of a de-excitation module, connected to the exciter winding and arranged separately from the power module and operated separately from the power module, which is applied to the exciter winding and at least partly compensates for the voltage currently being generated by way of the power module and applied to the exciter winding, so that a de-excitation of the exciter winding occurs.

Abstract: An externally excited synchronous machine having an exciter circuit, a stator, and a rotor. The rotor carries at least one exciter winding which, in operation, generates an exciter field, wherein the exciter winding, in operation, is excited by the exciter circuit along a power supply pathway, wherein the rotor includes at least one temperature sensor device having a communication device which, in operation, transmits a communication signal regarding a temperature of the rotor to at least one evaluation device, and wherein the communication signal is transmitted from the communication device to the evaluation device by a transmission route at least partially formed by a section of the power supply pathway.

Abstract: A motor vehicle includes a first voltage network and a second voltage network, an operating voltage of the second voltage network being lower than an operating voltage of the voltage network, and two DC voltage converters connecting the second voltage network to the first voltage network, each of the DC voltage converters including a hardware regulator that regulates the operating voltage of the second voltage network, the DC voltage converters being physically separated in the motor vehicle, the hardware regulators of the DC voltage converters being connected via a communication connection having at least one communication line, a first one of the hardware regulators, in operation, sends regulating information via the communication connection to a second one of the hardware regulators, and the second one of the hardware regulators, in operation, performs a regulating operation based on the regulating information sent by the first one of the hardware regulators.

Abstract: A power electronics arrangement, comprising an electrical conduction section, and a switching device which, in operation, switches the electrical conduction section. The switching device includes multiple parallel connected semiconductor switches which are triggered in common by a plurality of lead wires from a control unit and are switched across respective ones of the lead wire upon reaching a switching state of charge. Each of the lead wires has a same electrical resistance, and a different length.

Abstract: A conductive charging unit for a motor vehicle for electrically charging an energy storage device of the motor vehicle, including a charging contact unit with a charging contact which, for electrically conductive coupling to a charging connection of a charging plate external to the motor vehicle, is moved from a retracted position into an extended position in an extension direction and has a protective cover surrounding the charging contact unit perpendicular to the extension direction, which protective cover is extended together with the charging contact. The protective cover has a first end and a second end opposite in the extension direction with an edge region. The edge region has a circumferential hollow chamber, which includes at least one opening which provides a fluidic connection between the environment of the charging unit.

Abstract: An externally excited electric machine comprises a rotor as well as a contact device having at least one sliding contact element positioned against a contact segment of the rotor for transmitting an exciter current, wherein the sliding contact element is integrated in an electromagnetic actuator, by which it can be controlled to move between a position lying against the contact segment and a position spaced apart from it.

Abstract: A method for operating an electrical circuit arrangement comprising at least one first component and one second component, wherein the components are electrically connected across a direct current sub-grid of the electrical circuit arrangement, includes switching the first component at a first operating point with a first cycle time and switching the second component at a second operating point with a second cycle time, wherein the components are connected across a communication link and a phase position is determined and set between the first cycle time and the second cycle time as a function of fault information describing at least one present alternating voltage in the direct current sub-grid.

Abstract: A method for operating a motor vehicle comprising at least one first electric machine and at least one second electric machine, which are electrically interconnected to each other, wherein the first electric machine is operated at a first operating point and the second electric machine is operated at a second operating point, wherein the reactive power generated or taken up by the first electric machine at the first operating point is at least partly compensated by the second electric machine operating at the second operating point.

Abstract: A method for operating a motor vehicle having at least one electric machine, which is electrically coupled across a pulse inverter to a DC distribution bus of a high-voltage onboard network of the motor vehicle, includes, by means of a compensation unit electrically coupled to the DC distribution bus, feeding an electric compensation voltage to the DC distribution bus such that ripple of the electric DC voltage present in the DC distribution bus which is caused by the pulse inverter is at least partly compensated.

Abstract: A motor vehicle, including an electric machine as a drive machine, a high-voltage battery, a high-voltage network to which the electric machine and the high-voltage battery are connected, a low-voltage network having a lower voltage than the high-voltage network, and a DC-DC converter, which connects the low-voltage network and the high-voltage network and is designed for a maximum deliverable rated voltage. The DC-DC converter includes at least two independently usable converter circuits having different maximum power and a control unit. The control unit selects at least one converter circuit to be operated in dependence on a power requirement value of the low-voltage network.

Abstract: A system with a high-voltage battery and a coupling device that couples the high-voltage battery to a high-voltage onboard power supply system of a motor vehicle. The coupling device couples a positive pole and a negative pole with corresponding phases of the high-voltage power supply system. The coupling device includes a current measurement device that measures the current flowing between a first electrically conductive connection and a first interface and/or the current flowing between a second electrically conductive connection and a second interface, an actuating device, and at least one first semiconductor switch, as well as at least one second semiconductor switch, which is coupled between the second electrically conductive connection and the second interface. The first semiconductor switch includes a first control electrode and the second semiconductor switch includes a second control electrode, which are coupled to the actuating device.

Abstract: A method for operating an electrical energy storage device for a motor vehicle, which energy storage device includes an energy storage unit, which has an energy storage unit voltage during normal operation, and which, during a charging process, is charged by electrical energy provided at a charging connection point at a charging voltage that is lower than the energy storage unit voltage. Based on the energy storage unit voltage and the charging voltage, the energy storage unit is divided into a plurality of energy storage subunits, at least one of which has an energy storage subunit voltage that corresponds to the charging voltage and is electrically connected to the charging connection point for the at least partial charging of the energy storage unit.

Abstract: An energy system for a motor vehicle and a method for charging at least one electrical energy storage device of the energy system.

Abstract: A charging device for electric vehicles, with multiple charging points, to each of which an electric vehicle can be connected, and with multiple power electronics units each providing a maximum charging power, and a method for charging an electric vehicle.

Abstract: A method for controlling the braking operation of a motor vehicle including at least one electric drive machine, which is switchable into a generator mode effectuating a deceleration of the motor vehicle, as well as a friction braking device having multiple friction brakes, each assigned to a wheel, having brake elements, which are movable toward a brake disc via an actuator. A first braking is performed using the drive machine switched into the generator mode until a first threshold value of the regenerative power or deceleration is reached, after which additionally required braking power is provided by the friction braking device, which is also actuated upon reaching the threshold value.

Abstract: A motor vehicle, including an electric machine as a drive machine, a high-voltage battery, a high-voltage network to which the electric machine and the high-voltage battery are connected, a low-voltage network having a lower voltage than the high-voltage network, and a DC-DC converter, which connects the low-voltage network and the high-voltage network and is designed for a maximum deliverable rated voltage. The DC-DC converter includes at least two independently usable converter circuits having different maximum power and a control unit. The control unit selects at least one converter circuit to be operated in dependence on a power requirement value of the low-voltage network.