JPH0246101U

JPH0246101U -

Info

Publication number: JPH0246101U
Application number: JP12470188U
Authority: JP
Priority date: 1988-09-26
Filing date: 1988-09-26
Publication date: 1990-03-29

Description

[Brief explanation of drawings]

図面は本考案一実施例の構成説明図である。１は電動モータ、２は油圧モータ、３は方向切
替電磁弁、４はアクチユエータ、１０は比較器、
１１は位置検出センサ、１２はＰＩＤ補償アンプ
、１３はサーボアンプ、１４は正逆判別回路。 The drawing is an explanatory diagram of the configuration of an embodiment of the present invention. 1 is an electric motor, 2 is a hydraulic motor, 3 is a direction switching solenoid valve, 4 is an actuator, 10 is a comparator,
11 is a position detection sensor, 12 is a PID compensation amplifier, 13 is a servo amplifier, and 14 is a forward/reverse discrimination circuit.

Claims

[Claims for Utility Model Registration] (1) An electric motor, a hydraulic motor rotated by the electric motor, and an actuator;
A direction switching solenoid valve that performs switching operation in response to forward and reverse commands and guides oil from the hydraulic pump to the actuator to switch the operating direction of the actuator, a position detection sensor that detects the position of the actuator, and a position command EIN and position detection sensor. Sensor output E from
A switching control means outputs a positive or reverse command to the direction switching solenoid valve depending on the sign of the difference △E from FB to switch and control the direction switching solenoid valve, and the difference △E between the position command EIN and the sensor output EFB and drive control means for rotationally driving an electric motor by outputting an output voltage EPA from a servo amplifier based on the sensor output EFB and stopping generation of the output voltage EPA when the sensor output EFB matches the position command EIN. Hydraulic actuator device. (2) The electrohydraulic actuator device according to claim (1), wherein the drive control means includes a PID compensation circuit. (3) The electrohydraulic actuator device according to claims (1) and (2), wherein the circuit configuration is such that the neutral position of the direction switching solenoid valve communicates with both forward and reverse ports of the actuator.