Assessment of static BH characteristics of electrical sheets using a dc measuring set-up

This paper presents an original system for determining the static BH relationship for electrical sheets. The set-up is remote controlled and the measuring process is automatic, managed by a computer connected microcontroller. Two dc currents are increasingly adjusted to get a null magnetic flux in the air gap found in the median yoke of the measuring device, obtaining several current pairs. Afterwards, one solves an inverse magnetic field problem, using the dc currents pairs as input data in order to compute the BH relationship of the studied sample.