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Research on Vibration and Noise of Power Transformer Cores Including Magnetostriction Effects
Author(s): 
Pages: 1-6,19
Year: Issue:  4
Journal: Transactions of China Electrotechnical Society

Keyword:  电力变压器 磁致伸缩 各向异性 磁-机械强耦合模型 振动噪声;
Abstract: 硅钢片磁致伸缩是电力变压器产生振动噪声的主要原因,本文利用能量变分原理,建立了考虑电力变压器铁心磁致伸缩效应的三维磁-机械强耦合数值模型,应用有限元计算了三相三柱干式变压器空载条件下的磁场分布和铁心振动位移;在此基础上分析了铁心周围的声场分布。为了验证模型,对变压器铁心的振动和噪声分别进行了实验研究。理论计算与测量结果的比较证实了该强耦合模型的正确性,为在设计阶段计算变压器振动噪声大小、分布和寻求新的降噪措施,提供了理论依据和计算方法。
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