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AssigneeCaterpillar Inc.
InventorsRodney L. Menold, Cameron T. Lane, Andrew Olson, Karl P. Schneider
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Hydraulic load management for electric motor driven systems, such as hydraulic systems in a work machine, is disclosed. The hydraulic system may include an electric motor coupled to a hydraulic pump to provide hydraulic fluid to a hydraulic actuator, and a power bus may connect an electric power source to the electric motor. Hydraulic load management may include determining an actual electric power available at the electric power source, comparing the actual electric power to a threshold electric power for operating the electric motor at a full capacity, and setting a value for an available electric power and a current power curve for the electric motor corresponding to the available electric power. When hydraulic system input is detected, electric power is provided via the power bus, and the electric motor is operated at a motor speed based on the current power curve and a commanded speed from the hydraulic system input.
A work machine comprising:
A method for hydraulic load management of an electric motor driven hydraulic system of a work machine, wherein the hydraulic system includes both a hydraulic pump operatively coupled to the electric motor and a hydraulic actuator in fluid communication with the hydraulic pump, and wherein a power bus connects an electric power source of the work machine to the electric motor to transmit electric power from the electric power source to the electric motor, the method comprising:
A controller for a work machine having a hydraulic system including a hydraulic pump, an electric motor operatively coupled to the hydraulic pump, and a hydraulic actuator fluidly connected to the hydraulic pump, the work machine further including an electric power source and a power bus connecting the electric power source to the electric motor to transmit electric power from the electric power source to the electric motor, where the controller is configured to:
Dependencies are inferred from the claim text.