Method of Moments Based Modelling of Race-Track Fluxgate Sensitivity Dependence on Track and Core Width

Anna Ostaszewska-Liżewska , Roman Szewczyk

Abstract

Intensive development of thin-layer based fluxgate sensors produced as printed circuit boards demand proper tools for modelling their functional characteristics. This paper presents the application of the method of moments utilizing uniform square meshes to avoid problems with thin layer modelling utilizing finite elements method. Exemplary results of modelling indicate that the sensitivity of race-track shaped fluxgate sensor strongly depends on the width of the track, whereas the influence of the width of the core on the fluxgate sensitivity is about 3%. This information is important for development of printed circuit boards based fluxgate sensors with racetrack-shapedcores, as it can lead to significant reduction of the sensor’s perpendicular dimension.