Influence of tensile stress on the magnetic properties of ultra-thin grain-oriented electrical steel

Ultra-thin grain-oriented electrical steel (GOES) with thickness less than 0.1 mm can be used to make the iron core of the reactor and high-power magnetic amplifiers. The design of these electromagnetic devices often relies on the data of magnetic characteristics measured under standard sinusoidal excitation. However, the influence of working conditions such as stress and temperature are ignored. The magnetic properties of the magnetic materials under stress are quite different from those under sinusoidal excitation. It is very important to accurately measure the magnetic properties of ultra-thin GOES under stress conditions. This article presents and analyzes the extensive experimental results of magnetic properties in the rolling direction with uniaxial and biaxial tensile stress applied by piezoelectric materials.