Electronic CAM compensation of pressure change of servo controll

Details Electronic CAM compensation of pressure change of servo controll Electronic CAM compensation of pressure change of servo controll

1997-05-27

1999-10-26

Freay, Charles G.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 53, F04B 4908

Patent

active

059717149

ABSTRACT:
The construction and operation of the control of this invention is designed to minimize pressure changes at pump changeover by sampling pump pressure characteristics for each pump cycle, calculating a compensating motion profile and applying the profile to the motor which drives the pump. This control can be used with any pump which has the following characteristics: positive displacement, repeating cycle characteristics, rotary motor drive and an output pressure cycle curve which never falls to zero.

REFERENCES:
patent: 4950235 (1990-08-01), Slate et al.
patent: 5457626 (1995-10-01), Wolze

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