Process and device for operating dynamic-type compressors with regulators with high proportional amplification
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United States of America Patent
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Jun 16, 1998
Grant Date -
N/A
app pub date -
Jul 29, 1996
filing date -
Aug 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process and a device for avoiding regulator instabilities in surge limit regulators for protecting a turbocompressor from surging if a high proportional gain is selected for the surge limit regulator by a blow-off via a blow-off valve. The control of the velocity of closing of the blow-off valve over time is performed by a gradient limiter of asymmetric design, wherein no velocity limitation acts in the opening direction, but a freely parameterizable velocity limitation of the closing process of the blow-off valve is provided in the closing direction. The gradient limiter is inserted between the surge limit regulator, which receives the control signals on the actual value of flow and the desired value of flow from a subtracter, and the control line for a pneumatic or hydraulic operating device of the blow-off valve.
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