方向性電磁鋼板のヒステリシス損モデルに関する一考察

概要

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To establish a new model that can explain influence of various factors on hysteresis loss of electrical steel sheet, the hypothesis was formed that hysteresis loss accompanied by magnetic wall motion was expressed as a function of the volume of the area where magnetic walls moved (V) and the mobility of magnetic wall. V was expressed as a function of magnetostriction, magnetostriction constant, magnetic flux density, saturated magnetic flux density and the angle between the axis of easy magnetization and the direction of magnetic field when grain oriented electrical steel sheet was magnetized parallel to <100>, <110> and <111>. This model of V was verified by measuring hysteresis loss and magnetosriction of grain oriented electrical steel sheet under stress and revealing that hysteresis loss was proportional to 1.6th power of V.