Means for digital control

Details Means for digital control Means for digital control

1976-11-05

1979-04-03

Schaefer, Robert K.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318601, H02P 500

Patent

active

041479661

ABSTRACT:
A closed loop control system achieves high speed operation commensurate with low resolution A/D converters which, at the same time, is capable of accepting and using higher resolution control signals. A control loop includes a differencing device for providing an error signal produced as a difference between a reference value and an output value related to the controlled parameter, D/A converter and integrator, producing an output value for device control. The feedback loop includes an A/D converter. The reference value and reference value input to the differencing device as well as the D/A converter accept digital signals of resolution greater than those produced by the A/D converter.

REFERENCES:
patent: 3584203 (1971-06-01), Patzelt
patent: 3743906 (1973-07-01), Torok
patent: 3793511 (1974-02-01), Bala et al.
patent: 3843914 (1974-10-01), Carlson et al.
patent: 3950682 (1976-04-01), Dohanich

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