INDUCTIVE CURRENT SENSOR Russian patent published in 2020 - IPC G01R23/20 G01R15/18 

FIELD: electrical engineering.

SUBSTANCE: inductive current sensor, comprising excitation winding (13), excitation module (20) intended to generate excitation voltage (Ve), measuring winding (14), in which the measured measurement current passes (Iim), a synchronous measurement demodulator (22) for multiplying the induced measurement current by a demodulation signal with frequency of 2.f₀ to obtain a voltage which characterizes the measured current. Excitation voltage (Ve) is obtained based on first voltage with frequency f₀ and second voltage with frequency of 3.f₀, wherein inductive current sensor comprises automatic control winding (15), in which the induced current of automatic control passes, and a synchronous automatic control adjustment demodulator (30) for multiplying the induced automatic control current by the demodulation signal with frequency of 3.f₀.

EFFECT: synchronous automatic control demodulator is connected with excitation module for automatic control of excitation voltage so that frequency component 3.f₀ of induced current of automatic control is destroyed.

6 cl, 12 dwg