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用于发电机定子铁芯的铁芯损伤电磁感应检测法检测原理分析

DOI: 10.13336/j.1003-6520.hve.2015.01.017, PP. 123-131

Keywords: 定子铁芯,绝缘损伤,铁芯损伤电磁感应检测,有限元法,Chattock磁位计,故障位置

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Abstract:

为研究铁芯损伤电磁感应检测(electromagneticcoreimperfectiondetector,ELCID)法在诊断发电机定子铁芯绝缘损伤问题方面的有效性,根据ELCID法的基本原理,分析了ELCID设备的结构及应用,同时运用AnsoftMaxwell软件,建立了基于有限元法的定子铁芯仿真模型,分析了对于不同位置的故障点,以及不同程度的绝缘损伤,ELCID法是否都能有效进行测量。研究结果表明对于定子铁芯表面的绝缘损伤,ELCID法可以较为有效准确地测量表面故障点的电流;对于铁芯内部的故障,ELCID法不能准确测量故障点处的电流,但可以大致判断故障点的位置及损伤程度。相关结论为ELCID法的进一步应用提供了参考。

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