Digital valve control apparatus

Details Digital valve control apparatus Digital valve control apparatus

1986-01-22

1986-12-02

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

318685, 318696, G05B 1928

Patent

active

046267581

ABSTRACT:
A digital valve control apparatus for regulating opening of a digital valve by a pulse motor, comprising means for setting desired position and displacement speed of the pulse motor and means for selecting the set position and the set speed in response to instruction signals. While pulses having period corresponding to the set speed are produced by a frequency divider, the present position of the pulse motor is compared with the set position by a comparator. The pulses are fed to a counter which counts up or down to supply the output for driving the pulse motor until the comparator produces the coincident output.

REFERENCES:
patent: 4066941 (1978-01-01), Foster
patent: 4169991 (1979-10-01), Ross
patent: 4445075 (1984-04-01), Fry
patent: 4470108 (1984-09-01), Kato et al.
patent: 4528491 (1985-07-01), Takeuchi et al.
patent: 4529922 (1985-07-01), Ono

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