0.23 mm薄规格取向硅钢谐波损耗与磁致伸缩研究

Harmonic loss and magnetostriction study of 0.23 mm thin gauge grain-oriented silicon steel

通过模拟不同含量的3~7次谐波工况,对薄规格取向硅钢(0.23 mm)谐波损耗性能、磁致伸缩进行了研究,并探索了谐波工况下材料的磁畴结构演变规律。结果表明,励磁场中的谐波成分使薄规格取向硅钢材料磁滞回环面积增大、数量增多,同时引起硅钢内部磁通密度变化加剧;随着谐波次数或含量增加,磁滞损耗和涡流损耗均持续上升,取向硅钢附加损耗明显增大,含量为30%的5次谐波下材料损耗相比于正弦波增加89.7%;谐波引起取向硅钢180°畴细化,90°畴容积分数减小,磁致伸缩振幅λp-p增大,同时振幅蝴蝶曲线出现畸变。

In this work,harmonic loss and magnetostriction of thin gauge grain-oriented silicon steel(0.23 mm)were studied by simulating the invigorative magnetic field of 3-7 th harmonic superposition conditions.Meanwhile,evolution law of magnetic domain structure of the material was also explored.The results indicate that harmonic superposition could result in increases of hysteresis loop area and number of hysteresis cycles,as well as change reinforce of magnetic flux density in the samples.Magnetic hysteresis loss and eddy current loss increased continuously with enhancement of harmonic frequency or content,which brought sizeable addictional loss to the sample.Iron loss under 30%harmonic superposition of 5th harmonic increased by 89.7%compared with fundamental frequency.Harmonics caused decreases of width of 180°magnetic domains which could result in decreases of valume fraction of 90°domains and increases of magnetostrictive amplitudes λp-p.At the same time,the butterfly curves were distorted.