Bending Angle Influence of Grain-Oriented Silicon Steel on Iron Loss and Domain Patterns

Abstract

Bending angle influence of grain-oriented silicon steel on the iron loss and domain patterns was evaluated. The results showed that the additional bending at the octagonal wound core corner made more losses, when the initial plastic bending angle was several degrees apart from the designed angle. The iron loss in the octagonal wound core increased 31% when the initial plastic angle was 10°apart from the designed angle. At that bending angle, the magnetic domains were easily saturated and elastic stress was widely distributed near the bending corner.

Therefore, it needs to avoid the additional bending at the core corner, or to achieve the exact 45° bending angle equal to the designed angle.