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国网河北省电力有限公司沧州供电分公司,河北沧州 061001
保定天威保变电气股份有限公司,河北保定 071056
华北电力大学河北省输变电设备安全防御重点实验室,河北保定 071003
Received:16 April 2025,
Revised:2025-06-22,
Published:16 December 2025
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SONG Wenle, HAN Xue, WANG Lei, et al. Study on Magnetic Characteristics of Silicon Steel Sheets and Vibration Noise of Iron-core Under Stress[J]. High Voltage Apparatus, 2025, 61(12): 65-71.
SONG Wenle, HAN Xue, WANG Lei, et al. Study on Magnetic Characteristics of Silicon Steel Sheets and Vibration Noise of Iron-core Under Stress[J]. High Voltage Apparatus, 2025, 61(12): 65-71. DOI: 10.13296/j.1001-1609.hva.2025.12.009.
叠片铁心的振动噪声特性与铁心所受夹紧力紧密相关,同时应力也会影响硅钢片的磁特性。通过改进磁致伸缩仪,测量了一级能效薄硅钢片在轧制方向不同拉、压应力下的磁化、损耗和磁致伸缩特性,研究应力对磁致伸缩位移频谱中各分量的影响,结果表明硅钢片对压应力更为敏感,并且硅钢片的表面涂层改变了磁致伸缩位移频谱中各分量的变化趋势。设计并制作产品级铁心模型,对叠片方向施加不同夹紧力时各测点的振动噪声进行测量,分析铁心接缝与非接缝处的差异;基于有限元软件进行铁心电磁仿真,计算铁心磁密分布和叠片电磁力大小。试验和仿真结果表明,接缝处叠片方向电磁力大于其他方向电磁力,当铁心预紧力失效或接缝工艺不好时会导致接缝处局部噪声显著增大。研究可为运行条件下变压器铁心减振降噪研究提供原则依据。
The vibration noise characteristics of laminated cores are closely related to the clamping force applied to the core and,at the same time,the stress can also affect the magnetic properties of silicon steel sheets. By improving the magnetostrictive instrument,the magnetization,loss and magnetostrictive characteristics of the first-class energyefficient thin silicon steel sheets under different tensile and compressive stresses in the rolling direction are measured,and the influence of stress on the components of the magnetostrictive displacement spectrum is studied. The results show that the silicon steel sheetsare more sensitive to compressive stress,and the surface coating of the silicon steel sheets changes the variation trend of each component in the magnetostrictive displacement spectrum. A productlevel iron core model is designed and manufactured. The vibration noise of each measuring point is measured when different clamping forces are applied in the direction of the lamination,and the difference between the joint and the non-joint of the core is analyzed. Based on the finite element software,the electromagnetic simulation of the core is carried out to calculate the magnitude of magnetic density distribution of the core and theelectromagnetic force of the liminations. The experimental and simulation results show that the electromagnetic force of in the directino at the joint is greater than that in other directions. The failure of pre-clamping force or weak joint process can lead to significant increase of partial noise at the joint. The study can provide principle basis for the study of vibration and noise reduction of transformer core under operating conditions.
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