Feedback system

Details Feedback system Feedback system

1986-03-10

1988-03-22

Therkorn, Ernest G.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

210101, 2101982, 417 45, G05B 1940, B01D 1508

Patent

active

047331526

ABSTRACT:
To provide smooth constant flow from a pump a feedback system comprises: a power means for the pump motor; positive and negative feedback loop means for controlling said power means; means for alternately energizing and de-energizing said positive and negative feedback control means; said negative feedback control means receiving a signal from said means for measuring flow rate and including means for comparing said signal with said corrected flow rate reference signal while said second feedback loop is energized to generate an error signal controlling said power means; and said positive feedback control means applying an acceleration voltage to said motor from a time a preset period after the initiation of a return stroke of said piston until after a timed duration.

REFERENCES:
patent: 3855129 (1974-12-01), Abrahams
patent: 3917531 (1975-11-01), Magnussen
patent: 3985467 (1976-10-01), Lefferson
patent: 4131393 (1978-12-01), Magnussen
patent: 4180375 (1979-12-01), Magnussen

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