초록 ▼

An electropneumatic converter controlled by solenoid valves, in which the solenoid valves are connected respectively to the feed pressure and to atmosphere, each via a pressure regulator controlled by a differential pressure measurement device connected across a respective solenoid valve, so as to m

An electropneumatic converter controlled by solenoid valves, in which the solenoid valves are connected respectively to the feed pressure and to atmosphere, each via a pressure regulator controlled by a differential pressure measurement device connected across a respective solenoid valve, so as to maintain a constant pressure difference across the solenoid valves.

대표청구항 ▼

An electropneumatic converter with solenoid valve control, comprising a loading solenoid valve for loading and an unloading solenoid valve for unloading a capacitive chamber arranged in series with said solenoid valves and correspondingly connected by the loading solenoid valve to a feed pressure an

An electropneumatic converter with solenoid valve control, comprising a loading solenoid valve for loading and an unloading solenoid valve for unloading a capacitive chamber arranged in series with said solenoid valves and correspondingly connected by the loading solenoid valve to a feed pressure and by the unloading solenoid valve to atmosphere, said capacitive chamber being connected in series with a pressure repeater comprising a membrane separating said capacitive chamber from a repetitive pressure chamber which is connected to the feed pressure via a restriction and to atmosphere via a nozzle-plate system, the pressure of said repetitive pressure chamber being used to control a moving element of a booster unit modulating the output chamber pressure of an output chamber by means of a spring-loaded valving member connecting said output chamber pressure either to the feed pressure in the loading phase or to atmosphere in the unloading phase, characterized in that the loading solenoid valve is connected to the feed pressure via a first pressure regulator controlled by a first differential pressure measurement device connected across the loading solenoid valve such as to maintain the pressure difference across the loading solenoid valve constant and the unloading solenoid valve is connected to atmosphere via a second pressure regulator controlled by a second differential pressure measurement device connected across the unloading solenoid valve such as to maintain the pressure difference across the unloading solenoid valve constant.