摘要
本文探讨了工作磁密、直流偏磁对0.23 mm与0.27 mm同牌号取向硅钢片铁损的影响,重点对比了不同厚度产品之间的表现差异。结果表明,不同厚度硅钢片铁损均随工作磁密的增加而增加,呈抛物线分布且曲线形状相近。其中,较薄硅钢片的铁损几乎始终相对较低,体现了低厚度对涡流损耗与剩余损耗的降低效应。然而,这种降低效应因较薄硅钢片的大晶粒尺寸被抵消了较大部分,且随着工作磁密的增加被抵消更多。当施加直流偏磁时,两种厚度样品的铁损均随着直流偏磁量的增加而增加,其中0.23 mm硅钢片在较高直流偏磁情况下(>40 A/m)损耗增加更多。0.23 mm硅钢片在不同工作磁密及直流偏磁下,均表现出更不均匀的铁损分布,体现了粗大组织及相应不均匀的组织分布的影响。
To improve the efficiency of electric device and reduce the core loss,it is essential to apply suitable grain-oriented silicon steel sheets under different working conditions.This paper investigated the effects of working magnetic flux density and Bias DC on the iron loss of 0.23 mm and 0.27 mm grain-oriented silicon steel sheets respectively.The characteristic of iron loss in the silicon steel sheets with different thicknesses was compared and highlighted.Results showed that for the silicon steel sheets with different thicknesses,the iron loss increased when the working magnetic flux density increased.The trend follows a parabola in a similar way.In comparison,0.23 mm silicon steel sheets showed low iron loss,which was due to the reduction of low sheet thickness to eddy current loss and residual loss.However,the reduction effect was offset by the coarser and more inhomogeneous microstructure of 0.23 mm silicon steel sheets,and the reduction was greater under higher magnetic flux density.When DC bias was applied,the iron loss of both 0.23 mm and 0.27 mm silicon steel sheets increased with similar trend.Although the iron loss of 0.23 mm silicon steel sheets were almost always higher than that of 0.27 mm silicon steel sheets,there is more increase of iron loss in the 0.23 mm silicon steel sheet when the DC bias was higher than40 A/m.The iron loss distribution was more uneven under different working magnetic flux densities and more heterogeneous under different DC bias in 0.23 mm silicon steel sheets.The phenomenon reflected the effect of heterogeneous microstructure as well as texture.According to the connection between silicon steel sheet microstructure and its magnetic property,this study could provide reference to the grain-oriented silicon steel selection and production.
作者
杜鹏宇
张宁
侯东
何强
聂京凯
孟利
DU Pengyu;ZHANG Ning;HOU Dong;HE Qiang;NIE Jingkai;MENG Li(State Grid Cangzhou Power Supply Company,Department of Developmental Planning,Shijiazhuang 050000,China;Central Iron&Steel Research Institute,Metallurgical Technology Institute,Beijing 100081,China;Global Energy Interconnection Research Institute Co.,Ltd.,Institute of Electrical Engineering New Materials,Beijing 102211,China)
出处
《中国体视学与图像分析》
2020年第4期339-345,共7页
Chinese Journal of Stereology and Image Analysis
关键词
取向硅钢
铁损
工作磁密
直流偏磁
组织
grain-oriented silicon steel
iron loss
working magnetic flux density
DC bias
microstructure
