Magnetic properties deterioration of non-oriented steel due to laser cutting

被引:1
|
作者
Zhang, Changgeng [1 ,2 ]
Zhang, Yan [1 ,2 ]
Li, Yongjian [1 ,2 ]
Yang, Qingxin [1 ,2 ]
机构
[1] Hebei Univ Technol, State Key Lab Reliabil & Intelligence Elect Equipm, Tianjin 300401, Peoples R China
[2] Hebei Univ Technol, Prov Minist Joint Key Lab EFEAR, Tianjin 300401, Peoples R China
基金
中国国家自然科学基金;
关键词
LOSSES;
D O I
10.1063/9.0000586
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In the manufacturing process of electrical machines, laser cutting is widely used to produce the laminations of cores. The internal stresses introduced by the high-energy laser beam will lead to deterioration in the magnetic properties of the non-oriented silicon steels. To accurately predict the core losses of the electrical machines, it is important to analyze the deterioration degree and the deterioration mechanism of the non-oriented steel sheets caused by laser cutting. In this paper, first, the local magnetic properties of the non-oriented steel 35WW250 at different positions are measured under the alternating sinusoidal excitation, in which the degradation degree is evaluated based on the core loss from the macroscopic perspective. Second, from the microscopic perspective, the observed magnetic domain patterns at the edge and those evolutions under the excitation of the magnetic field are investigated. The experimental results demonstrate that laser cutting can lead to the magnetic degradation of the non-oriented steels with a transverse depth of 18 mm from the edge. Moreover, the laser cutting process leads to significant variations in the patterns of the magnetic domains at different positions. The magneto-optical observation and local magnetic measurement verified the effectiveness of the analytical method, which is of great significance for the evaluation and improvement of the processing technique of the silicon steels.
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页数:6
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