FIELD: machine building.
SUBSTANCE: amplifier is intended for automatic systems. The amplifier includes a summing operating amplifier with two inputs, an electronic power amplifier, an electromechanical converter, a hydraulic control valve of the first stage; a hydraulic control valve of the second stage, which is kinematically connected to a movable element of an electric feedback sensor hydraulically connected to supply and drain hydraulic lines, hydraulically connected through two hydraulic lines to the hydraulic control valve of the first stage and having two output hydraulic lines to be connected to a consumer; matching equipment, the input of which is connected to a signal winding of the electric feedback sensor of the hydraulic control valve of the second stage; an electrohydraulic pressure drop sensor hydraulically connected through two hydraulic lines to output hydraulic lines of the hydraulic control valve of the second stage; an electronic calculating device, one input of which is connected to the output of the matching equipment of the electric feedback sensor of hydraulic control valve of the second stage, and the other input is connected to an electric output of the electrohydraulic pressure drop sensor; output of the electronic calculating device is connected to the second input of the summing operating amplifier.
EFFECT: increasing the efficiency of power part of the drive.
2 dwg
