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非晶合金卷绕定子铁心振动噪声的研究

, PP. 13-21

Keywords: 非晶合金,磁致伸缩,卷绕铁心,磁机械耦合,振动噪声

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Abstract:

建立考虑磁致伸缩效应的非晶合金卷绕定子铁心的磁-机械耦合数学模型。采用非晶合金定子铁心模态实验对卷绕结构铁心弹性模量进行修正的方法,研究非晶合金定子铁心卷绕结构对振动的影响。应用三维有限元法计算定子铁心的磁场分布、形变和振动加速度;并在此基础上分析定子铁心周围声场分布。提出非晶合金卷绕定子铁心振动噪声测试方法,通过实验验证计算方法的有效性。同时完成了不同供电频率下不同磁通密度时定子铁心振动噪声的测试,总结定子铁心振动和噪声的影响规律。得出定子铁心振动加速度随磁通密度平方呈正比和定子铁心噪声随磁通密度呈对数函数规律变化的结论,确定了曲线拟合公式和系数。

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