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HYDRAULIC DRIVE DEVICE OF ELECTRIC-POWERED HYDRAULIC OPERATING MACHINE
In a hydraulic drive system for an electrically driven hydraulic work machine that executes flow rate control of an hydraulic pump by controlling a rotation speed of an electric motor to drive a hydraulic pump to supply a hydraulic fluid to a plurality of actuators, and power consumed by the electric motor reliably limited within a range of preset maximum allowable power without unnecessary degradation of responsiveness of the electric motor. To this end, a controller 50 includes a maximum angular acceleration limitation section (allowable rate computation section 50n and rate limitation section 50j), computes hydraulic power consumed by a main pump 2, computes a maximum angular acceleration allowed for an electric motor 1 on the basis of a magnitude of the hydraulic power and a preset maximum allowable power consumable by the electric motor 1, and limits an angular acceleration of the electric motor 1 not to exceed the maximum angular acceleration.
HYDRAULIC DRIVE DEVICE OF ELECTRIC-POWERED HYDRAULIC OPERATING MACHINE
In a hydraulic drive system for an electrically driven hydraulic work machine that executes flow rate control of an hydraulic pump by controlling a rotation speed of an electric motor to drive a hydraulic pump to supply a hydraulic fluid to a plurality of actuators, and power consumed by the electric motor reliably limited within a range of preset maximum allowable power without unnecessary degradation of responsiveness of the electric motor. To this end, a controller 50 includes a maximum angular acceleration limitation section (allowable rate computation section 50n and rate limitation section 50j), computes hydraulic power consumed by a main pump 2, computes a maximum angular acceleration allowed for an electric motor 1 on the basis of a magnitude of the hydraulic power and a preset maximum allowable power consumable by the electric motor 1, and limits an angular acceleration of the electric motor 1 not to exceed the maximum angular acceleration.
HYDRAULIC DRIVE DEVICE OF ELECTRIC-POWERED HYDRAULIC OPERATING MACHINE
HYDRAULISCHE ANTRIEBSVORRICHTUNG EINER ELEKTRISCH ANGETRIEBENEN HYDRAULISCHEN ARBEITSMASCHINE
DISPOSITIF D'ENTRAÎNEMENT HYDRAULIQUE D'UNE MACHINE À ACTIONNEMENT HYDRAULIQUE À ALIMENTATION ÉLECTRIQUE
TAKAHASHI KIWAMU (author) / ISHII TAKESHI (author) / MAEHARA TAIHEI (author)
2024-04-17
Patent
Electronic Resource
English
HYDRAULIC DRIVE DEVICE OF ELECTRIC-POWERED HYDRAULIC OPERATING MACHINE
| European Patent Office | 2020