| 摘要 |
<p>Provided is a power source apparatus which determines an optimal maximum input setting for a hydraulic pump, respectively for normal working and for continuous operation of the hydraulic pump under high-load pressure conditions. The power source apparatus includes a controller which carries out horsepower control to determine a flow rate of the hydraulic pump on the basis of first characteristics and second characteristics which each define the maximum input setting of the hydraulic pump by the discharge pressure of the hydraulic pump and the flow rate of the hydraulic pump, and on the basis of the discharge pressure detected by a pump pressure sensor. When the discharge pressure is less than a set pressure and when a state where the discharge pressure is equal to or greater than the set pressure has not continued for a set time period, then the controller determines the flow rate on the basis of the first characteristics, and when the state where the discharge pressure is equal to or greater than the set pressure has continued for the set time period, then the controller determines the flow rate on the basis of the second characteristics.</p> |
