A working equipment (2) comprising a hydraulically movable arm arrangement (4) for a crane, at least one electric motor (6) arranged to be powered by a battery system (8), at least one hydraulic pump (10) arranged to be operated by the electric motor (6), and a pump controller (12) configured to control the electric motor (6) and/or the hydraulic pump (10), and to monitor the current consumption (13) of the at least one electric motor (6). A plurality of actuators (14) is provided, arranged to be operated by hydraulic fluid discharged from the at least one hydraulic pump (10) and further arranged to move the movable arm arrangement (4) during a working assignment, and an equipment controller (16) configured to control movement of the movable arm arrangement (4) by generating operating signals (18) controlling the flow and/or pressure of hydraulic fluid to the plurality of actuators (14). The equipment controller (16) is arranged to determine a maximum flow limit of the hydraulic fluid from the at least one pump in dependence of a comparison of the current limit received from the battery system (8) and the current consumption (13) monitored by the pump controller (12). The equipment controller (16) is configured to compare said determined maximum flow limit with the required flow of hydraulic fluid from the at least one pump (10) needed to move the movable arm arrangement (4) in accordance with the operating signals, and if the result of the comparison does not fulfil at least one rule of a set of fluid control rules, the equipment controller (16) is configured to adapt the operating signals (18) to reduce the flow of hydraulic fluid to at least one of the plurality of actuators (14) according to at least one rule of a set of adaptation rules, such that at least one rule of said set of fluid control rules is fulfilled.


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    Title :

    WORKING EQUIPMENT WITH ELECTRICALLY POWERED HYDRAULICALLY OPERATED ARM ARRANGEMENT


    Additional title:

    ARBEITSAUSRÜSTUNG MIT ELEKTRISCH ANGETRIEBENER, HYDRAULISCH BETÄTIGTER ARMANORDNUNG
    ÉQUIPEMENT DE TRAVAIL DOTÉ D'UN AGENCEMENT DE BRAS À COMMANDE HYDRAULIQUE ET À ALIMENTATION ÉLECTRIQUE


    Contributors:

    Publication date :

    2021-12-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein






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