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计及频率和脉宽脉冲电流激励下铁磁材料局部磁滞特性的分析与模拟

DOI: 10.13334/j.0258-8013.pcsee.2015.05.029, PP. 1258-1265

Keywords: 局部磁滞,曲线拟合,脉冲电流,铁磁材料

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Abstract:

激励频率和脉宽是研究脉冲电流激励下铁磁材料局部磁滞特性的两个重要因素。脉冲电流峰值保持不变,改变频率和脉宽,得到不同的局部磁滞曲线。由于磁通密度具有磁后效应,频率越高,脉宽越小,磁后效应越明显,局部磁滞曲线达到稳定所需要的激励电流脉冲数越多。为描述频率和脉宽对铁磁材料局部磁滞特性的影响,根据频率、脉宽和转折点磁通密度值的变化规律,采用曲线拟合的方法建立不同局部磁滞曲线拟合函数间的数学关系。模拟结果和实验结果表明,在一定范围内,拟合的数学式能够有效地反映频率和脉宽的影响规律,较准确地模拟频率和脉宽不同的脉冲电流激励下铁磁材料的局部磁滞特性。

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