Study of the Inverse Magnetostriction Effect on Machine Deformation

This paper studies the inverse magnetostriction effect on the magnetization characteristics of electrical steel as well as the magnetoelastic behavior of electrical machines. They include the measurement of the inverse magnetostriction effect, the magnetoelastic coupled FEM analysis including the inverse magnetostriction effect, and its application on a PM motor. The magnetic force on the stator irons with and without IME are calculated numerically and compared. Conclusions on the magnetostrictive force calculated by the virtual work principle are given. They show that the inverse magnetostriction effect is significant and should be accounted.