ROTATION CONTROL APPARATUS FOR ROTARY ACTUATORS

摘要

A low-cost, precision rotation control apparatus suitable for a large-output rotary actuator. This apparatus comprises a hydraulic rotary servo valve (4) having a rotary spool (40) and a rotary sleeve (20); an electric motor (5) having an output shaft connected to either the rotary spool (40) or the rotary spool (20), the motor being electrically controlled to vary its rotational speed and angular position; a hydraulic motor (3) having an output shaft connected to the remaining one of the rotary spool (40) and rotary sleeve (20); a hydraulic pump (1) adapted to drive the hydraulic motor (3) via the hydraulic rotary servo valve (4); and a driving power source (2) for driving the hydraulic pump (1).