CURRENT SENSOR Russian patent published in 2020 - IPC G01R15/18 G01R19/14 

FIELD: measurement.

SUBSTANCE: invention relates to power electronics and measurement equipment, namely to current sensors, and can be used in designing measurement systems of DC, AC and pulse currents, in particular, as current sensors in monitoring devices and protection of electric power facilities both in ground conditions, and on-board of aircrafts. Current sensor comprises first and second transformers, secondary windings of which are connected according to, and as common primary winding bus with measured current is used, a comparator made on an operational amplifier (OA), a current-to-voltage converter made on the OA, a resistor, one output of which is connected to a common point of the secondary windings of the first and second transformers, and the other terminal is grounded, the first and second differential amplifiers (DA), the start-up capacitor.

EFFECT: technical result when implementing the declared solution is reduction of output voltage ripple, automatic start-up of the circuit at start-up, as well as normal operation in wide frequency and temperature ranges.

3 cl, 1 dwg