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晶粒无取向硅钢片取向特性分析

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Keywords: 无取向硅钢片,磁致伸缩,二维磁特性,各向异性,损耗

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Abstract:

随着电机容量的增加,大型同步发电机的局部过热和振动问题尤为突出。在电机铁心损耗计算及振动分析过程中,需要准确描述无取向硅钢片的磁性能及磁致伸缩效应。本文基于单片硅钢片二维磁特性测试系统,测量了无取向硅钢片在旋转磁通条件下磁场强度矢量的变化轨迹,并根据磁通密度与磁场强度在一个时间周期内的矢量关系,分析了硅钢片的矢量磁特性及损耗特性。基于改进的单片磁致伸缩特性测试技术,测量了硅钢片在不同磁化方向上的磁致伸缩波形,定义并提取了能够描述硅钢片磁致伸缩特性的单值曲线。研究结果表明,无取向硅钢片具有取向磁性能和各向异性磁致伸缩特性。

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