Electrical transmission or interconnection systems – Plural supply circuits or sources – Connecting or disconnecting
Patent
1974-12-19
1976-04-27
Smith, Jr., David
Electrical transmission or interconnection systems
Plural supply circuits or sources
Connecting or disconnecting
307102, 317137, H02J 100, H02J 300
Patent
active
039537412
ABSTRACT:
A stepwise control for two-step control operations comprising a series of switching stages which for each stage value of a control magnitude as the input magnitude switches-on a corresponding stage value of a physical output magnitude as an adjustment magnitude and each of which possess switching hysteresis, the width of which is defined by the difference of the values of the input magnitude for switching-in and switching-off the switching stage, there being present a smallest stage value of the output magnitude and the value of the output magnitude of a subsequent stage is greater by the amount of such smallest stage value than that of the preceding stages and the total value of the output magnitude is divided over the switching stages into such partial values that by switching-on and/or switching-off the switching stages it is possible to portray the individual stage values of the output magnitude. The switching stages possess switching hystereses having hysteresis widths which differ from one another, and the switching stages can be actuated by means of switch-on values and switch-off values of the input magnitude which respectively increase and decrease for the individual switching stages in the sequence of their hysteresis widths. Both of the first two switching stages respectively switch the smallest stage value of the output magnitude and the partial value of the output magnitude of each further switching stage is not greater than the sum of the partial values of the output magnitude of the respective momentarily preceding switching stages of the series.
REFERENCES:
patent: 3235743 (1966-02-01), Ryerson et al.
patent: 3339079 (1967-08-01), Kessler
patent: 3428821 (1969-01-01), Ruffieux
patent: 3609388 (1971-09-01), Hemmenway
Smith Jr. David
Stata-Control System SCS AG
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