CONTROL METHOD AND CONTROL DEVICE FOR CONSTRUCTING EXISTING HYDRAULIC CONTROL SYSTEM INTO POWER SAVING HYDRAULIC CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a control method and control device for constructing an existing hydraulic control system installed in machinery into a power saving hydraulic control system in order to solve such various problems as the occurrence of huge amounts of installation costs, stagnation of production, assurance of an installation place of a new device, and disposal of an existing facility.;SOLUTION: Control rotation speed of each motor installed in an existing hydraulic control device 52 and control discharge of each hydraulic pump are calculated by an execution processing of a programmable logic controller B3 on the basis of conventional output means 60 output by an existing electric control board 53. The rotation speed of each motor is changed by the execution processing of a control function and a main circuit in an inverter control device 15 in accordance with the control rotation speed of each motor or D/A converted INV rotation speed command, and the discharge of each hydraulic pump is controlled at the same time.;COPYRIGHT: (C)2013,JPO&INPIT