METHOD AND APPARATUS FOR CONTROLLING ACTUATOR WITH BRAKE

摘要

PURPOSE:To provide a fluid control valve which can be operated at high speed and has good responsibility by applying a thrust to a movable member of an actutator and intermittently driving the brake to intermettently put the movable member in a stationary state. CONSTITUTION:A valve body 14 disposed in a valve main body 12 of a fluid control valve 10 is coupled to a movable member having a diameter larger than that of the valve body to be united in a body. The movable member 18 is provided with a linear actuator 32 for moving the movable member in a straight line and a brake 34 for limiting the movement of the movable member 18 which are sisposed outside the valve main body 12. The movable member 18 can be displaced by thrust from the actuator only when the braking force of the brake 34 is off and be put in a stationary state when the braking foce is on.