| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the occurrence of a shock due to a flow rate variation when an operation state of a rotating hydraulic device and a rotary electric machine device is switched during the operation of a construction machine. <P>SOLUTION: On the basis of drive torque of a hydraulic pump 3 which is detected by a torque sensor 34, if an actuator drive torque is smaller than a switch torque τ0, a controller 35 closes an electromagnetic switch valve 17, causes a rotary electric machine device 8 to function as a generator, and controls a flow rate control valve 13 with a pressure compensation function so that the flow rate of pressure oil supplied from the hydraulic pump 3 to a rotating hydraulic device 9 is decreased as the actuator drive torque increases, and if the actuator drive torque is larger than the switch torque, the controller opens the electromagnetic switch valve 17, causes the rotary electric machine device 8 to function as an electrical motor, and controls the flow rate control valve 13 with a pressure compensation function so that discharged oil of the hydraulic pump 3 is not supplied to the rotating hydraulic device 9. <P>COPYRIGHT: (C)2012,JPO&INPIT |
