Abstract: A method for operating a motor vehicle having a vehicle electrical system, which includes at least one electrical or electronic component, which experiences a load during an operation of the motor vehicle, an accumulated load of the at least one component being ascertained, at least one type of damage contributing to the load being ascertained, a service life of the at least one component to be expected as a result of the ascertained accumulated load being ascertained, and at least one variable damaging the at least one component during operation, which is selected as a function of the at least one type of damage, being changed in a load-reducing direction if the service life to be expected of the at least one component deviates from a setpoint service life.

Abstract: A method for operating an electric machine coupled to an internal combustion engine in a motor vehicle, the electric machine having a stator winding, a rotor winding, a field regulator assigned to the rotor winding and a current converter post-connected to the stator winding having controllable switching elements, in which during a starting process of the internal combustion engine the electric machine is operated as a motor according to a rotational speed specification signal.

Abstract: A method for operating a power supply unit for an electrical system of a motor vehicle, the power supply unit having an electric generator having a stator having a stator winding and a rotor having a rotor winding, as well as a field current controller assigned to the rotor winding for selecting the setpoint of the current flowing through the rotor winding; the electric generator being set into rotation without a current being specified by the rotor winding, thereby generating a starting voltage; at least one component of the power supply unit or of the vehicle electrical system being energized by the starting voltage.

Abstract: A method for operating a drive train which has an electric motor for producing a mechanical target torque corresponding to an electric desired power level includes: specifying, as a function of a state of charge of a power battery, the electric desired power level, the electric desired power level being independent of the state of charge of the power battery when the state of charge of the power battery is in a plateau region.

Abstract: A method for operating a drive train which has an electric motor for producing a mechanical target torque corresponding to an electric desired power level includes: specifying, as a function of a state of charge of a power battery, the electric desired power level, the electric desired power level being independent of the state of charge of the power battery when the state of charge of the power battery is in a plateau region.

Abstract: A method for operating a power supply unit for an electrical system of a motor vehicle, the power supply unit having an electric generator having a stator having a stator winding and a rotor having a rotor winding, as well as a field current controller assigned to the rotor winding for selecting the setpoint of the current flowing through the rotor winding; the electric generator being set into rotation without a current being specified by the rotor winding, thereby generating a starting voltage; at least one component of the power supply unit or of the vehicle electrical system being energized by the starting voltage.

Abstract: A device for operating a drivetrain, which drivetrain includes an electrical machine, has an energy management unit and an electrical machine management unit. The energy management is configured for transmitting a desired electrical, and/or a lower electrical limit, and/or an upper electrical limit power to the electrical machine management unit.

Abstract: A method for operating an electric machine coupled to an internal combustion engine in a motor vehicle, the electric machine having a stator winding, a rotor winding, a field regulator assigned to the rotor winding and a current converter post-connected to the stator winding having controllable switching elements, in which during a starting process of the internal combustion engine the electric machine is operated as a motor according to a rotational speed specification signal.

Abstract: A device for operating a drivetrain, which drivetrain includes an electrical machine, has an energy management unit and an electrical machine management unit. The energy management is configured for transmitting a desired electrical, and/or a lower electrical limit, and/or an upper electrical limit power to the electrical machine management unit.