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脉冲电流激励下铁磁材料的局部磁滞特性分析

DOI: 10.13334/j.0258-8013.pcsee.2014.12.022, PP. 2004-2011

Keywords: 局部磁滞,脉冲电流,铁磁材料,Preisach磁滞模型,曲线拟合,测量方法

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Abstract:

脉冲电流周期性变化时,测量得到不同脉冲电流激励下铁磁材料的局部磁滞曲线。通过2种方法建立能够描述局部磁滞曲线的数学模型,一种是基于Preisach模型的模拟方法,该方法根据铁磁材料的极限磁滞回线和转折点的值及修正系数,可以建立不同局部磁滞曲线的数学模型;另一种是曲线拟合方法,该方法通过脉冲电流峰值的变化和转折点的值可以建立不同局部磁滞曲线拟合函数间的数学关系,实现曲线的数学模拟。模拟结果表明,前者方法简便,应用范围宽、通用性强;后者方法繁琐,需建立曲线的拟合函数,模拟精度高。研究表明,两种方法都能够有效地模拟不同脉冲电流激励下铁磁材料的局部磁滞特性。

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