Control system for controlling surge as a function of pressure o

Details Control system for controlling surge as a function of pressure o Control system for controlling surge as a function of pressure o

1990-07-10

1992-12-29

Koczo, Michael

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417 53, F04D 2702

Patent

active

051747294

ABSTRACT:
A surge control (200) for a compressor (12) which produces a compressed gas in accordance with the invention includes a surge control valve (88) having a variable opening which is controlled by an electrical control signal which controls a flow rate of compressed gas flowing through a bypass line (84) between a point of higher pressure and a point of lower pressure in the compressor to control surge; a pressure transducer (120and 122), coupled to the compressor at a point of pressure higher than an inlet to the compressor, for producing an electrical signal representative of pressure; a filter (124), coupled to the pressure transducer, for filtering a selected frequency component of pressure fluctuations represented in the electrical signal to produce a filtered signal; and a controller (132), coupled to the filter, for producing the control signal as a function of the filtered signal.

REFERENCES:
patent: 2969805 (1961-01-01), Hunter
patent: 4003370 (1977-01-01), Emil et al.
patent: 4156578 (1979-05-01), Agar et al.
patent: 4177649 (1979-12-01), Venema
patent: 4227862 (1980-11-01), Andrew et al.
patent: 4581900 (1986-04-01), Lowe et al.
patent: 4807150 (1989-02-01), Hobbs
"A New Technology in Energy-Efficient Electrically Driven Aircraft Environmental Control Systems" Authored by W. Cloud, J. McNamara and David B. Wigmore, presented at the 21st IECEC Conference, Aug. 25-29, 1986, Article #869390 American Chemical Society, pp. 1696-1702.

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