Computer-based system for magnetic measurements on ferromagnetics over typical field ranges

A new technique is described to measure static non-linear properties of ferromagnetics, primarily, the normal magnetization curves. The studies were carried out on the basis of the computerized measurement system developed at the Efremov Scientific Research Institute (NIIEFA). Due to flexible software architecture the system is capable of measuring a variety of magnetic characteristics. The measurement technique provides determination of steel properties over two overlapped field ranges covering a typical computation range. The measurements are performed on conventional ring-shaped samples in low fields (|B|≤ 1.9 T) and cylindrical samples in high fields (|B|> 1.5 T). The cylindrical samples are magnetized with the use of a laboratory dipole magnet. Estimations of the measurement uncertainty are presented. Measured data in the form of smoothed curves are automatically added to a material property database and used as inputs for a precision 3D field reconstruction with the use of the COMPOT code