Abstract: A controller of a machine identifies that a battery of the machine is connected to an electrical power connector component. The controller then causes one or more charging components of the battery of the machine to be enabled, then cause one or more electrical components associated with the battery of the machine to be enabled, then causes one or more cooling components of the machine to be enabled, then causes one or more propulsion components of the machine to be disabled, then causes one or more accumulator components of a hydraulic system of the machine to bleed, and then causes one or more non-accumulator components of the hydraulic system of the machine to be enabled. In this way, the controller causes the battery of the machine to enter into a charging state.

Abstract: A method for controlling an electric motor driving a hydraulic pump for a battery-powered electric mobile machine includes receiving one or more command signals for one or more hydraulically-driven systems. The method also includes determining a minimum pump speed for each of the one or more hydraulically-driven systems, and determining a highest minimum pump speed for the one or more hydraulically-driven systems. The method further includes converting the highest minimum pump speed to an electric motor command, and sending the electric motor command to the electric motor.

Abstract: A control system for an alternating current (AC) machine having a rotor and a stator is disclosed. The control system may include a direct current (DC) link providing a variable DC link voltage; an inverter module operatively coupled between the DC link and the AC machine, and a controller in communication with the inverter module. The inverter module may include a plurality of gates in selective communication with each phase of the stator. The controller may be configured to receive a signal indicative of the variable DC link voltage, receive a signal indicative of a rotational speed of the rotor, receive a torque command, and generate a direct-axis current command and a quadrature-axis current command using the variable DC link voltage, the rotational speed, and the torque command as inputs into a three-dimensional lookup table preprogrammed into a memory associated with the controller.

Abstract: A method of controlling an engine speed of a machine is provided. The method includes determining if an engine power demand is below a rated engine power. The method further includes determining if a drive motor of the machine is operating within a constant power region. The method also includes comparing an available engine power with the engine power demand. The method further includes changing the engine speed such that an available engine power is greater than the engine power demand by a predetermined margin.

Abstract: An electric drive control system for a machine is provided. The electric drive control system includes a sensor and a drivetrain control module operatively coupled to the sensor. The sensor is configured to determine one or more operational parameters associated with the machine. The drivetrain control module is further operatively coupled to a power source controller associated with a power source and a generator controller associated with a generator. The drivetrain control module is configured to determine a desired operating mode of the machine and selectively regulate one or parameters associated with the power source based on a predefined dataset corresponding to the desired operating mode of the machine. The drivetrain control module is further configured to selectively adjust an amount of power produced by the generator based on the predefined dataset corresponding to the desired operating mode of the machine.

Abstract: The disclosure describes, in one aspect, a system for a machine having an electric drive configuration. The system includes an electric motor associated with at least one wheel and adapted to provide retarding torque to the wheel, and a controller configured to determine a power measurement of a retarding grid and control the retarding torque to the at least one wheel during retarding as a function of the power measurement.

Abstract: The disclosure describes, in one aspect, a system for a machine having an electric drive configuration. The system includes an electric motor associated with at least one wheel and adapted to provide retarding torque to the wheel, and a controller configured to determine a power measurement of a retarding grid and control the retarding torque to the at least one wheel during retarding as a function of the power measurement.

Abstract: The disclosure describes, in one aspect, a method for changing a direction of a machine that is moving in a first direction. The method includes the step of receiving a signal indicative of an intention to change the direction of the machine to a second direction. The method also includes the step of determining whether a signal indicative of a speed of the machine is greater than a threshold based at least in part on an electric motor parameter. Finally, the method includes the step of applying a braking torque to at least one travel mechanism of the machine in response to a signal indicative of an accelerator pedal position until the speed reaches the threshold.

Abstract: A method for load management for an electric drive machine comprises receiving a fuel signal indicative of a volume of fuel provided to an engine associated with the electric drive machine, receiving an engine speed signal indicative of a rotational speed of an output shaft of the engine, and receiving a boost pressure signal indicative of a pressure of air at an intake manifold of the engine. The method further includes determining a torque adjustment factor based on the fuel signal and the boost pressure signal, and determining a torque capability of the engine based on the fuel signal and the engine speed signal An engine torque limit is determined based on the torque capability and the torque adjustment factor A first motor torque command signal is determined for a first electric drive motor of the electric drive machine based at least in part on the engine torque limit.

Abstract: The disclosure describes, in one aspect, a method for changing a direction of a machine that is moving in a first direction. The method includes the step of receiving a signal indicative of an intention to change the direction of the machine to a second direction. The method also includes the step of determining whether a signal indicative of a speed of the machine is greater than a threshold based at least in part on an electric motor parameter. Finally, the method includes the step of applying a braking torque to at least one travel mechanism of the machine in response to a signal indicative of an accelerator pedal position until the speed reaches the threshold.