Control system for controlling a dynamic compressor
US3979655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Mar 31, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D16/208
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control system is disclosed for a cascade control of a dynamic compressor having a variable speed of rotation to maintain a constant pressure to a process. The method consists of a successive junction of control loops for controlling the speed of rotation, the flow rate of a compressor, the pressure in the delivery or in suction; the output signal of each outer loop being the input signal for the inner loop and each of the loops containing a compensating element to reduce the effects of large time constants of all inner loops. An automatic control system based on using the above method, distinguished by its great transient and steady state precision in maintaining a main controlled parameter, and by the high reliability of protection of the compressor from surge and from a dangerous increase of the speed of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.