Experimental Study on the Effect of Mechanical Stress on the Comprehensive Magnetic Properties of the Grain-Oriented Silicon Steel
Zhao Xiaojun1, Zhang Lingyun2, Liu Yang3, Dong Lichun4, Yi Zhuo1
1. Department of Electrical Engineering North China Electric Power University Baoding 071003 China; 2. Langfang Power Supply Company State Grid Jibei Electric Power Corporation Langfang 065000 China; 3. State Key Laboratory of Advanced Transmission Technology Global Energy Interconnection Research Institute Co. Ltd Beijing 102211 China; 4. 22, China Metallurgical Group Corporation Tangshan 064000 China
Abstract：Transformer cores are subjected to external stress and high-frequency excitation for a long time during operation, which leads to increasingly severe problems of vibration, noise, and loss. To further study the comprehensive magnetic properties of the grain-oriented silicon steel sheet under different frequencies and stresses, a platform for measuring the comprehensive magnetic properties of soft magnetic material is established. Firstly, the effects of tensile and compressive stress on magnetostriction, hysteresis loop and loss characteristics of the grain-oriented silicon steel at 50Hz are obtained by using a single-sheet tester and a stress-controllable device. Furthermore, the variation of the comprehensive magnetic properties of the grain-oriented silicon steel sheet is studied, and the influence of stress and different incentives on the magnetic, magnetostrictive and acoustic characteristics is analyzed. The measured results show that compressive stress rather than tensile stress greatly influences on the magnetic properties of the grain-oriented silicon steel sheet. Furthermore, the magnetostriction decreases with the increase of frequency under compressive stress, whereas the noise increases with higher frequency, harmonic content, harmonic order, and more immense compressive stress.
赵小军, 张凌云, 刘洋, 董立春, 仪卓. 机械应力对取向硅钢片综合磁性能影响的实验研究[J]. 电工技术学报, 2022, 37(22): 5776-5787.
Zhao Xiaojun, Zhang Lingyun, Liu Yang, Dong Lichun, Yi Zhuo. Experimental Study on the Effect of Mechanical Stress on the Comprehensive Magnetic Properties of the Grain-Oriented Silicon Steel. Transactions of China Electrotechnical Society, 2022, 37(22): 5776-5787.
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