SECONDARY POWER SUPPLY Russian patent published in 2013 - IPC G05F1/56 

FIELD: electricity.

SUBSTANCE: invention suggests secondary power supply which consists of a switching element; primary wiring of a transformer which first lead is connected to the first output of power supply source and the second lead is connected through primary circuit of a current sensor to the first output of the switching element; input of the latter through pulse generator and threshold device connected in-series is connected to the first output of output circuit of an error signal shaper and its second output is connected to summator output; the first input of the summator is connected to secondary circuit of the current sensor, the second input of the summator is connected to reference-supply source, outputs of input circuit of the error signal shaper are connected to the first secondary wiring of the transformer while its second wiring is connected to the load; service power supply unit with its first and second inputs connected to the first and second outputs of the primary power supply; positive and negative supply busses of reference-supply source, pulse generator and threshold device are connected to the output of the service power supply unit and the second output of the primary power supply source respectively; and the switching element consists of two bipolar transistors.

EFFECT: enlarging the upper range of input operating voltage for secondary power supply source.

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