A new type of fluxgate current sensor based on dual-core detection technology and self-oscillating technology is proposed.The sensor exhibits high measurement precision and linearity in an open-loop configuration and is characterized by its high sensitivity and resolution.The output voltage of the sensor is obtained by linearly superimposing the excitation current signals of the magnetic cores

C

1

and

C

2

followed by filtering demodulation.Compared with traditional single-core sensors

this not only utilizes the current detection capability of the second magnetic core to improve sensitivity and resolution

but also constructs

complementary or identical excitation signals to effectively suppress conduction modulation ripple.This research contributes to the design of novel closed-loop self-oscillation fluxgate current sensors

realizing simultaneous suppression of conduction and inductive modulation ripples

thereby significantly enhancing measurement precision.