OIL PRESSURE CONTROL DEVICE

摘要

An oil pressure control device for supplying oil pressure by rotating a hydraulic pump, by means of a motor, comprises an oil pressure sensor; a speed instruction operation unit for outputting a speed instruction value, based on a difference between an oil pressure determination value from the oil pressure sensor and an oil pressure instruction value; a torque instruction value operation unit for calculating a torque instruction value, based on a difference between a speed determination value and the speed instruction value; and a current control unit for controlling a current of the motor, based on the torque instruction value, and adds the load variation compensation speed outputted from the load variation compensation unit and the speed instruction value.

主权项

1. An oil pressure control device for supplying oil pressure by rotating a hydraulic pump, using a motor, comprising:
an oil pressure sensor operatively placed between the hydraulic pump and a load; a speed instruction operation unit configured to output a speed instruction value, based on a difference between an oil pressure determination value output from the oil pressure sensor and an oil pressure instruction value; a load variation compensation unit configured to output a load variation compensation speed for compensating the speed instruction value outputted from the speed instruction operation unit, depending on variation of the load; a torque instruction value operation unit configured to output a torque instruction value, based on a difference between a speed determination value obtained by differentiating a position determination value output from a motor position determination unit mounted on the motor and a sum of the speed instruction value and the load variation compensation speed; and a current control unit adapted to control a current of the motor, based on the torque instruction value.