Abstract: A method for operating a drive train for a mobile machine, including a first electric motor driving a working drive of the mobile machine via a first transmission arrangement, and a second electric motor driving a propulsion drive of the mobile machine via a second transmission arrangement, wherein a rotational speed of the second electric motor increases during a shifting operation of the second transmission arrangement out of a higher gear stage into a lower gear stage, and wherein during the shifting operation, a drive connection is established via a first clutch between the first electric motor and the propulsion drive, such that the propulsion drive is driven by the first electric motor during the shifting operation.

Abstract: A tractor-trailer combination (10) includes a tractor machine (12), a trailer (14; 40; 50; 60; 70; and an inverter (30; 100, 102). The trailer (14; 40; 50; 60; 70; 90) comprises a driven axle (18; 42; 72, 74; 92, 94), a clutch (46; 54, 56; 78; 104, 106), and an electric traction motor (24; 96, 98). The traction motor (24; 96, 98) drives the respective wheels of the driven axle (18; 42; 72, 74; 92, 94) via the clutch (46; 54, 56; 78; 104, 106). The tractor machine (12) comprises an electrical energy source (26) for supplying the traction motor (24; 96, 98) via the inverter (30; 100, 102). In addition, the invention relates to a trailer (14; 40; 50; 60; 70; 90) for a tractor-trailer combination (10).

Abstract: A drivetrain for a working machine, including at least one electric motor and an electric energy storage device. The at least one electric motor is configured to provide mechanical power and the energy storage device is configured to supply the at least one electric motor with electrical power. The energy storage device includes at least two individual storage units electrically connected in series.

Abstract: A method for operating a self-driving working machine including determining an operating variable of a working device of the self-driving working machine and determining a longitudinal dynamics driving variable of the self-driving working machine. The method also includes checking whether a hazardous state for stability of the self-driving working machine can occur based on the determined operating variable and the determined longitudinal dynamics driving variable The method also includes intervening in longitudinal dynamics of the self-driving working machine depending on a check result based on the checking step.

Abstract: A converter apparatus for an electric vehicle includes a battery interface for connecting the converter apparatus to a vehicle battery and a bidirectional inverter having a first connector for connecting the inverter to the battery interface and a second connector. The inverter converts a DC voltage applied to the first connector into an AC voltage and to provide this voltage to the second connector. The converter apparatus includes a switch device having a switch connector for connecting the switch device (118) to the second connector, a drive interface for connecting the converter apparatus to a drive motor, and an additional interface for connecting the converter apparatus to an additional motor. The switch device is designed to connect the switch connector to the drive interface or the additional interface using a switching signal.

Abstract: A method for operating an electric drivetrain of a working machine is provided wherein, the drivetrain includes a work drive with a hydraulic work device and an electric work motor, and a travel drive with an electric travel motor. The method includes operating the work drive independently of the travel drive, and supplying a power demanded by the work drive taking into account an efficiency of the work motor and an efficiency of the work device.

Abstract: A method for operating an electric drivetrain of a working machine is provided wherein the drivetrain comprises a work drive with an electric work motor and a travel drive with an electric travel motor and vehicle wheels, wherein the working machine experiences a speed deceleration from the outside that may result in a braking force acting on the vehicle wheels lower than a driving force acting on the vehicle wheels due to a moment of inertia of the travel motor. The method includes supplying the travel motor with a power in a direction opposite to an operating direction of the travel motor in order to reduce a rotational speed of the travel motor, if it is detected in advance using a situation detection that the braking force acting on the vehicle wheels as a result of the speed deceleration is lower than the driving force acting on the vehicle wheels.

Abstract: A method for operating an electrified drive train, the drivetrain including a driving coupling of an electric motor to at least one wheel of a working machine, the method including generating an acceleration torque by the electric motor, the acceleration torque leading to an increase in speed of the at least one wheel, generating a braking torque, the braking torque leading to a reduction in speed of the at least one wheel, generating a second acceleration torque by the at least one wheel, the second acceleration torque leading to an increase in a speed of the electric motor, and generating a second braking torque by the at least one wheel, the second braking torque leading to a reduction in the speed of the electric motor, wherein, during a regenerative operation of the electric motor, an unwanted acceleration of the working machine is counteracted by an automated additional braking intervention.

Abstract: A propulsion drive system for a mobile machine includes an electric motor having a first range, in which a torque is constant as a rotational speed rises, and a second range, in which a power is constant as the rotational speed rises. The propulsion drive system further includes a transmission operatively connected mechanically to the electric motor. The propulsion drive system is configured to be transferred, via the transmission, from a state for relatively low driving speeds into a state for relatively high driving speeds of the mobile machine. The electric motor and the transmission are adapted to one another in such a way that the electric motor can be operated in the state for relatively low driving speeds exclusively in the first and second range.

Abstract: A method for operating a drive train for a mobile machine, including a first electric motor driving a working drive of the mobile machine via a first transmission arrangement, and a second electric motor driving a propulsion drive of the mobile machine via a second transmission arrangement, wherein a rotational speed of the second electric motor increases during a shifting operation of the second transmission arrangement out of a higher gear stage into a lower gear stage, and wherein during the shifting operation, a drive connection is established via a first clutch between the first electric motor and the propulsion drive, such that the propulsion drive is driven by the first electric motor during the shifting operation.

Abstract: The disclosure relates to a method for controlling a flow of electrical power between an electrical energy source and at least two electric machines of a working vehicle. In one step, an electrical power which can be drawn from the energy source is determined. In a further step, at least two electrical powers which are required for the at least two electric machines are determined. In yet another step, the electrical power which can be drawn is distributed to the at least two electric machines in the ratio of the at least two required electrical powers, such a distribution being carried out if the sum of the at least two required electrical powers is greater than the electrical power which can be drawn. The disclosure also relates to a controller for carrying out the described method and to a working vehicle having such a controller.

Abstract: The disclosure relates to a method for operating a drive train for a working machine, in which a working drive of the working machine is driven by a first electric motor via a first gear arrangement, a travel drive of the working machine is driven by a second electric motor via a second gear arrangement and, in a shifting procedure of the second gear arrangement, the rotational speed of the second electric motor is synchronised and the temperature of said second electric motor is recorded. In the disclosed method, the rotational speed is synchronised by supplying current to the second electric motor, and in the event of a threshold temperature being exceeded, at least one measure is carried out to relieve the thermal load of the second electric motor. The disclosure further relates to a corresponding drive train and to a working machine.

Abstract: The disclosure relates to a method for operating a drive train of a working machine, wherein the drive train comprises a working drive and a travel drive. The working drive is driven by a first electric motor and the travel drive is driven by a second electric motor. The disclosed method includes that the travel drive is additionally driven by the first electric motor if at least one performance criterion of said travel drive has been met. The disclosure further relates to a corresponding drive train and to a working machine.

Abstract: A propulsion drive system for a mobile machine includes an electric motor having a first range, in which a torque is constant as a rotational speed rises, and a second range, in which a power is constant as the rotational speed rises. The propulsion drive system further includes a transmission operatively connected mechanically to the electric motor. The propulsion drive system is configured to be transferred, via the transmission, from a state for relatively low driving speeds into a state for relatively high driving speeds of the mobile machine. The electric motor and the transmission are adapted to one another in such a way that the electric motor can be operated in the state for relatively low driving speeds exclusively in the first and second range.

Abstract: A method for performing a cold start in a vehicle having a power-spat transmission with a hydrostatic element comprising hydrostatic units. Several cold-start steps are performed sequentially for a cold start, the length of at least one of the cold-start steps is adapted depending on a temperature representing the start temperature of the power-split transmission. A state of the power-split transmission deviating from the temperature of the power-split transmission is monitored, during the execution of at least one of the cold-start steps, and, depending on this state, a transition from the respective cold-start steps to the subsequent cold-start step is performed, thus adapting the length of time of the respective cold-start steps.