Proportional-integral pressure controller operating control valve between pressure reservoir and equipment, includes actual pressure differentiation unit for inactivating or resetting integral section

摘要

An actual pressure differentiation unit (24) has a threshold stage (27) for inactivating or resetting the integral section (21) from given pressure variation threshold values. A limiter (22, 23) holds amplitudes of input or output signals of the integral section, within given values. The actual pressure differentiation unit (24) comprises a differentiation stage (25) followed by a filter (26). The threshold stage (27) receiving the output signal of the actual pressure differentiation unit (24) is connected to a reset- or deactivation input of the integral section (21).