| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic control device equipped with a hydraulic pump driven by an electric motor, which stably operates a hydraulic pump or the like and realizes energy saving. <P>SOLUTION: The device consists of a hydraulic pump 32 which discharges a hydraulic fluid, a hydraulic actuator 39, an operating device which is operated to perform operation control, a discharge pressure sensor 37 which detects a discharge pressure of the hydraulic fluid discharged by the hydraulic pump 32, a hydraulic fluid pressure sensor 38 which detects a hydraulic fluid pressure of the hydraulic actuator, an electric motor 33 which drives the hydraulic pump, an inverter 43 which supplies an electric power to the electric motor 33, a controller 40 which acquires a difference between the discharge pressure detected by the discharge pressure sensor 37 and the hydraulic fluid pressure detected by the hydraulic fluid pressure sensor 38 and which performs control to change the discharge pressure of the hydraulic pump 32 through the adjustment of a magnitude of the electric power supplied to the electric motor 33 so as to force the difference to be a constant value. <P>COPYRIGHT: (C)2011,JPO&INPIT |
