Pumps – Condition responsive control of pump drive motor – Single motor control element responsive to means sensing...
Patent
1987-03-13
1989-07-25
Yasko, John D.
Pumps
Condition responsive control of pump drive motor
Single motor control element responsive to means sensing...
417 63, 222 63, 604152, 604153, 73718, F04B 4960
Patent
active
048508055
ABSTRACT:
A pump control system is described in which the pumping mechanism causes corresponding movement of a pair of capacitor plates. The plates are energized by an a.c. signal, and the signal produced by the plates is amplitude detected, with the amplitude modulation representing pumping force. The pumping force is converted to pumping pressure. The pumping pressure peak during pumping and the pressure minimum during filling are detected to determine the portion of a pumping cycle required to make the transition between these two pressure levels. The difference between the two pressure levels divided by the transition portion of the pumping cycle gives a measure of the compliance of the pump chamber. The ratio of the compliance measure to the total cycle, when multiplied by the nominal chamber volume, gives a measure of unpumped volume, which is subtracted from the nominal volume to give the volume actually pumped during a pump cycle. The volume pumped is compared with a desired flow rate to determine a speed control value for the motor of the pumping mechanism. A motor control signal is developed by subtracting from a constant number a value which is a factor of the spaced control value and the position of the motor.
REFERENCES:
patent: 3736930 (1973-06-01), Georgi
patent: 3831588 (1974-08-01), Rinder
patent: 3989913 (1976-11-01), Lundquist et al.
patent: 4184510 (1980-01-01), Murry et al.
patent: 4207871 (1980-06-01), Jenkins
patent: 4236880 (1980-12-01), Archibald
patent: 4255088 (1981-03-01), Newton et al.
patent: 4261360 (1981-04-01), Perez
patent: 4277266 (1981-07-01), Archibald
patent: 4322201 (1982-03-01), Archibald
patent: 4324259 (1982-04-01), Wright
patent: 4367435 (1983-01-01), Bailey et al.
patent: 4373525 (1983-02-01), Kobayashi
patent: 4468222 (1984-08-01), Lundquist
patent: 4526574 (1985-07-01), Pekkarinen
patent: 4583915 (1986-04-01), Montgomery et al.
patent: 4718576 (1988-01-01), Tamura et al.
Ludding Frans
Madsen Kay
Brinton Yorks, Jr. W.
Critikon Inc.
Daley Kathleen A.
Yasko John D.
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