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利用等效电导率进行叠片铁心涡流场分析的有效性和精确性

, PP. 162-168

Keywords: 匀质化方法,涡流场,等效电导率,叠片铁心,TEAM21问题

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Abstract:

对于分析叠片铁心中的涡流问题,利用各种等效电导率替代硅钢片实际电导率的匀质化方法是很有应用前景的。为了评估各种电导率模型,该文提出了铁心涡流场分析的二维解析验证方法,并分别基于引入各向异性或各向同性等效电导率的铁心连续体表述和实际叠片表述对涡流场进行了解析计算。通过比较连续体表述下所得到的平均磁通密度和涡流损耗值与相应由实际叠片表述所得到的精确解,对各种电导率模型的有效性和准确性在各种条件下进行了评估。为了进一步考察电导率模型对实际工程问题的适用性,利用有限元法进行了关于TEAM21面向工程基准问题的磁通和杂散场损耗计算。计算结果表明,由该文作者所提出的等效电导率模型优于其他模型。

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