激光刻痕对取向硅钢铁损和磁畴的影响规律研究  

Effect of laser scribing on core loss and magnetic domain of grain-oriented silicon steel

作　　者：杨富尧[1,2] 古凌云[3] 马光 陈新 任宇[3] 薛志勇[3] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]国网智能电网研究院电工新材料研究所,北京100052 [3]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《功能材料》2016年第2期2160-2165,2170,共7页Journal of Functional Materials

基　　金：国家电网公司科技资助项目(SGRI-WD-71-13-002;SGRI-WD-71-14-002)

摘　　要：激光刻痕是一种降低取向硅钢片铁损的有效方法。选取激光功率、扫描速度、激光频率、刻痕间距作为工艺变量,对取向硅钢片进行刻痕实验,并利用磁性能测试系统和磁畴观测仪研究了不同工艺参数对激光刻痕后取向硅钢铁损和磁畴的改善效果。结果表明,取向硅钢片的平均铁损降低率随激光功率和刻痕间距增大而先增大后减小,随激光频率和扫描速度增大而减小。经不同工艺参数刻痕后,硅钢片的磁畴宽度均有所减小,且磁畴宽度的变化规律与铁损降低率的变化规律相吻合。优化了取向硅钢片的激光刻痕工艺参数,利用此工艺刻痕后,取向硅钢片的平均铁损降低率达8%。It is well known that laser magnetic domain refinement(LMDF)is an effective way to reduce the power losses of grain-oriented silicon steel.Although people have done a lot of research on LMDF,the relationship between laser parameters and core loss reduction as well as that between laser parameters and magnetic domain of grain-oriented silicon steel has not been studied in detail yet.The core loss and magnetic domain of grain-oriented silicon steel that refined by different laser parameters are investigated by soft magnetic testing system and domain viewer.The results show that the average core loss reduction rate of grain-oriented silicon steel reaches a maximum value and then decreases while increasing laser power and scribing spacing,and it decreases while increasing laser frequency and scanning speed.After laser scribing processing with different parameters,the width of magnetic domain of silicon steels all narrows down,and the eddy current losses of silicon steel sheet also decrease,leading to the reduction of the core loss of silicon steel sheet.The variation of magnetic domain width is changing consistently according to the change of core loss reduction rate.Furthermore,the optimized parameters of laser scribing were obtained,by which the average core loss of grain-oriented silicon steel can reduce 8%.

关 键 词：取向硅钢 激光刻痕 铁损 细化磁畴 

分 类 号：TB275[一般工业技术—工程设计测绘]