Study of estimation of iron loss under both dc-biased magnetization and compressive stress for design of energy saving devices

该测量系统用于测量电钢板在直流偏磁和压应力作用下的半静态磁滞回线（激励频率为5mHz）。研究了压应力对初始磁化曲线上产生的小回路磁滞损失的影响。不论压应力的大小，当直流偏磁化强度为1时，无取向电钢板小回路的磁滞损耗最大。5T被应用。当施加5MPa的压应力时，小回路的磁滞损耗增加速率减小。在直流偏磁大于1的情况下。5T时，当压应力增大时，小回路的迟滞损失几乎不增加。

The measurement system was developed used for the measurement of the semi-static hysteresis loop (excitation frequency : 5mHz)of an electrical steel sheet under both dc-biased magnetization and compressive stress. The effect of the compressive stress on the hysteresis loss of minor loop which generated on the initial magnetization curve is examined. Irrespective of the largeness of compressive stress, the hysteresis loss of a minor loop of the non-oriented electrical steel sheet reaches the maximum when the DC biased magnetization of 1. 5T is applied. When the compressive stress of 5MPa is impressed, the increasing rate of the hysteresis loss of a minor loop decreases. Under the dc-biased magnetization above 1. 5T, when the compressive stress increases, the hysteresis loss of a minor loop hardly increases.