Application of a non-linear numerical integral method to predict microfluxgate output

An original model to predict microfluxgates output voltage is presented. First, the limits of the classical analytical demagnetizing factor model are exhibited thanks to a comparison with measurements. Then, an anhysteretic non-linear numerical integral model, based on the Method of Moments, is proposed to compute magnetization correctly at each point of the cores and at any moment. Output voltage is finally deduced from magnetization variation. Sensitivity measurements of the second harmonic on a microfluxgate have confirmed this approach.