System and methods for controlling rotary screw compressors

Details System and methods for controlling rotary screw compressors System and methods for controlling rotary screw compressors

1997-10-08

2000-06-20

Thorpe, Timothy S.

Pumps

With condition responsive pumped fluid control

Responsive to pump created drive motor condition

417 53, 417310, F04B 4900

Patent

active

060770511

ABSTRACT:
An electronic control system dynamically varies the output capacity of a compressor by controlling plural valves associated with the compressor to provide pressurized air to a distribution system at an appropriate rate. The control system operates in any of three modes for standalone operation, including continuous run, auto/dual pressure band, and target pressure modes. In the first two modes, pressure bands are dynamically calculated based on load and unload values entered by an operator. These electronic control systems can also be connected in a peer-to-peer network to coordinate control of up to 16 compressors feeding the same distribution system, so as to maintain a desired target pressure in the system. A modem connected to the system supports remote diagnostics, monitoring, and control. Specialized startup, operating, and shutdown diagnostic algorithms prevent damage to the compressor and avert unsafe operating conditions.

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