A Simple Method to Examine Magnetomechanical Effect in High Grain-Oriented Electrical Steel

Grain oriented electrical steel is the most common core material used in power and distribution transformers. Compressive mechanical stress has a detrimental effect on the magnetic properties of the steel; thus, it is important to develop techniques and models that might be useful for the designers of magnetic circuits in non-rotating electrical machines. The present paper proposes an approach to address this issue. The approach is related to previous research by Garikepati et al., yet it uses more easily accessible measurement data (coercive field strength). The phenomenological T(x) model is used as part of the computational chain. The results might interest engineers working on the nondestructive testing of soft magnetic materials.