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US 4,072,889 AGranted
Electronically stabilized feeder device for the supply of DC current
AssigneeDr. K. Witmer Elektronik AG
InventorsKurt Witmer, Roland Cachin
Life of this patent
Estimating the term…
Abstract
An electronically stabilized feeder device for supplying regulated DC current to a load includes circuitry for adjusting the load voltage to a selected value, circuitry for adjusting the load current to a selected value, and circuitry responsive to load current to limit load voltage and thereby limit the power supplied to the load to the selected value and to reduce load voltage to its lowest value regardless of selected values in the event of a short circuit.
Claims21
An electrically stabilized feeder device for supplying direct current to a load through a load circuit comprising:
- power supply means for supply DC voltage to said load circuit;
- regulating means connected at least partly seially in said load circuit;
- control selecting means connected to operate said regulating means;
- an adjustable load current controlling means connected to said control selecting means, said load current controlling means operating to limit the current to said load circuit to a selected predetermined value;
- an adjustable load voltage controlling means connected to said control selecting means, said load voltage controlling means operating to maintain, under certain conditions, the load voltage at a selected predetermined value;
- and power controlling means connected to said control selecting means, said power controlling means being responsive to output power, formed by the product of said current in said load circuit and of said load voltage;
- said control selecting means effecting operation of said regulating means when said power controlling means senses a power which is at least approximately like a specified maximum power limit, to automatically alter either the load voltage value or the value of said current in the load circuit, in dependency of which of these values being externally set to ensure that the maximum power limit is not exceeded.
4 more elements
Dependencies are inferred from the claim text.