Affiliations: [a] School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing, CO, China | [b] Xuzhou Power Supply Branch of State Grid Jiangsu Electric Power Co. Ltd, Xuzhou, CO, China | [c] Southwest Branch of State Grid Cooperation of China, Sichuan Province, CO, China
Correspondence:
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Corresponding author: Pengning Zhang, School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing, CO 100083, China. E-mail: 201926@cumtb.edu.cn
Abstract: Accurate measurement of magnetostriction is the basis for calculating the vibration of silicon steel laminated core. In this paper, a laser magnetostriction measurement system (MST500) is used to study the magnetostriction characteristics of silicon steel under sinusoidal, third harmonic, and DC bias magnetization. The magnetostrictive butterfly curves, time domain waveforms, and spectrum diagrams of silicon steel sheets under different excitations are compared and analyzed. The effects of different operating conditions on the magnetostrictive properties of silicon steel sheets were studied and analyzed, mainly including amplitude and spectrum analysis. Finally, the magnetostrictive peak to peak curves under different operating conditions were extracted, providing a data basis for the core vibration of power equipment.
Keywords: Magnetostriction, silicon steel sheet, vibration, working conditions
