Electronic digitized proportional-integral controller

Details Electronic digitized proportional-integral controller Electronic digitized proportional-integral controller

1987-03-27

1988-03-22

Dobeck, Benjamin

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, 318609, G05B 1928

Patent

active

047331445

ABSTRACT:
A digital proportional-integral controller for controlling the speed of a d.c. electric motor in a copying machine and synchronizing it with the speed of another motor in the copying machine. The proportional stage and the integral stage of the controller are each formed by an up/down counter which counts up or down depending upon the pulses of the actual speed signal and the reference signal. Logic circuits are provided for processing the speed signal pulses and the reference signal pulses before they are fed to the up/down counters. The controller also has an interface for a two-wire bus system over which data and commands for adjusting and varying the control parameters can be input.

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patent: 4564795 (1986-01-01), Parkes et al.
patent: 4623827 (1986-11-01), Ito
patent: 4680516 (1987-07-01), Guzik et al.

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