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 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 drive axle for a work machine for driving wheels that are coupled to the drive axle. The drive axle includes a spur gear stage with an input shaft. A differential gear unit couples to the spur gear stage and to the wheels via wheel drive shafts. The drive axle further includes a reduction gear unit with an output element couples to the input shaft of the spur gear stage—and an input element which couples to an output shaft of an electric drive machine.

Abstract: An electric drive arrangement for a drive train of a work machine includes a multi gear transmission. The multi gear transmission includes at least two gears that provide different transmission ratios for various driving modes of the work machine, a multi gear transmission drive, and a multi gear transmission output configured to be mechanically coupled to an axle of the drive train. The electric drive arrangement further includes an electric motor configured to drive a driving movement of the work machine via a shaft that is mechanically coupled to the multi gear transmission drive of the multi gear transmission.

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 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 drivetrain for a work machine, wherein a first electric motor drives a work drive of the work machine via a first transmission arrangement, wherein a second electric motor drives a traction drive of the work machine via a second transmission arrangement, and wherein, during a shift process of the second transmission arrangement from a relatively low gear ratio stage to a relatively high gear ratio stage, the rotational speed of the second electric motor is reduced. The method according to the disclosure is distinguished by the fact that, during the shift process, a driving connection is produced between the first electric motor and the second transmission arrangement by a first clutch, such that, during the shift process, the first electric motor drives the traction drive. The disclosure furthermore relates to a corresponding drivetrain and to a work 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: An electric drive arrangement for a drive train of a work machine includes a multi gear transmission. The multi gear transmission includes at least two gears that provide different transmission ratios for various driving modes of the work machine, a multi gear transmission drive, and a multi gear transmission output configured to be mechanically coupled to an axle of the drive train. The electric drive arrangement further includes an electric motor configured to drive a driving movement of the work machine via a shaft that is mechanically coupled to the multi gear transmission drive of the multi gear transmission.

Abstract: A drive axle for a work machine for driving wheels that are coupled to the drive axle. The drive axle includes a spur gear stage with an input shaft. A differential gear unit couples to the spur gear stage and to the wheels via wheel drive shafts. The drive axle further includes a reduction gear unit with an output element couples to the input shaft of the spur gear stage—and an input element which couples to an output shaft of an electric drive 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.