Compact fluxgate sensor with a vector compensation of a measured magnetic field

Compact tri-axial fluxgate sensor which combines new materials, traditional ring-core topology and vector field compensation is introduced. The core support material is BNP-2. This new material provides an extremely high thermal conductivity (92.6W/m.K), which helps to eliminate thermal gradients in the core. The core is made of Vitrovac 6025X amorphous metallic ribbon. Thermally stable glass filled laminate was used to manufacture the pick-up and vector coil compensation support. The vector compensation topology has several advantages - it eliminates the cross-field effect and brings down the non-orthogonality. The presented design should outperform common tri-axial fluxgate sensors while keeping the dimensions at acceptable level. Magnetometer construction and preliminary results are discussed.