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ELECTRO-HYDRAULIC DRIVE SYSTEM FOR A WORK MACHINE

  • US 20130180247A1
  • Filed: 07/13/2011
  • Published: 07/18/2013
  • Est. Priority Date: 08/18/2010
  • Status: Active Grant
First Claim
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1. An electro-hydraulic drive system for a work machine which drives a structure body by controlling a flow rate of a hydraulic fluid by a control valve, comprising:

  • a supply device which includes a hydraulic pump driven by a driving power source, and a first electric motor, and supplies the hydraulic fluid;

    a drive device which includes a hydraulic motor rotated by the hydraulic fluid supplied from the supply device, and a second electric motor, and drives the structure body; and

    a controller which decides an operating state of the first electric motor and an operating state of the second electric motor, based on a load of the supply device and a load of the drive device.

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