| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic pump system capable of being stably operated at a target pressure while suppressing increase in time needed to reach the target pressure.SOLUTION: A hydraulic pump system 100 includes: a hydraulic pump 1; a motor 2; a speed control section 3; a pressure detection section 5; and a pressure/speed state classification control section 6 for classifying a state on the basis of a comparison result between a rotation speed of the motor 2 and a first threshold and a comparison result between a pressure of oil and a second threshold, and determining a control coefficient for controlling the rotation speed of the motor 2 in correspondence with the classified state. The pressure/speed state classification control section 6 determines a gain value as the control coefficient. The motor 2 is driven on the basis of a second calculated rotation speed when the second calculated rotation speed calculated with the usage of the control coefficient is smaller than a first calculated rotation speed calculated based on a flow rate target value.SELECTED DRAWING: Figure 1 |
