Abstract
Thin (less than 0.1mm) grain-oriented silicon steels are known to have lower iron loss than iron-based amorphous materials. It is possible to reduce the iron loss of thin grain-oriented silicon steels further by applying new magnetic-domain refining techniques. One method for magnetic-domain refining is to control the grain size. We observed the magnetic, domain and measured the iron loss of thin grain-oriented silicon steels with small (less than 1mm) grains. This experiment showed that the magnetic-domain can be made narrower by decreasing the grain size, which reduces the eddy current losses. On the other hand, materials with larger grain sizes have lower Hc and lower hysteresis losses.
