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基于磁力线划分的开路条形非线性永磁体分布参数模型

DOI: 10.13334/j.0258-8013.pcsee.2014.09.014, PP. 1429-1435

Keywords: 分布参数模型,非线性永磁体,磁力线,解析法,电磁系统

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Abstract:

含有AlNiCo、FeCrCo等非线性永磁体的电磁机构,在参数设计过程中需要进行上千次的电磁吸力计算,若使用有限元等数值方法,将消耗大量计算时间,而传统等效磁路法的计算精度有限。为了解决这一问题,提出了一种永磁体分布参数模型(distributedparametercalculationmodel,DPM),推导其完整的数学模型及校验条件;以某牌号开路状态下条形非线性永磁单体为例,使用基于磁力线划分的建模方法,求解各分段的起始工作点及截面磁通,并对比有限元方法和实验测试数据,验证了该分布参数模型在永磁单体计算中的正确性。对比有限元法与实测结果可知,该模型具有计算速度快、计算精度较高的特点。

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