| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic pressure device capable of satisfactorily controlling discharge pressure of a hydraulic pump even when characteristics of a load are changed and quickly responding to variation of a request flow rate of the load. <P>SOLUTION: A control device 5 provided to the hydraulic pressure device determines the target discharge flow rate of a pilot pump 1 corresponding to the target discharge pressure of the pilot pump 1 on the basis of both the ratio of the target discharge pressure of the pilot pump 1 to the discharge pressure of the pilot pump 1 detected by a pressure sensor 3, and the discharge flow rate of the pilot pump 1 determined from the rotational velocity of the pilot pump 1 detected by a rotational velocity sensor 4, and controls the rotational velocity of an electric motor 2 so that the discharge flow rate of the pilot pump 1 approaches the target discharge flow rate of the pilot pump 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
