基于变频器网侧电流感应电机定子故障诊断

发布时间：2018-01-13 05:11

本文关键词：基于变频器网侧电流感应电机定子故障诊断　出处：《电机与控制学报》2015年12期 　论文类型：期刊论文

【摘要】：提出一种基于变频器网侧电流频谱分析的感应电机定子故障诊断方法。当感应电机发生定子故障时,定子电流负序分量将通过逆变器、整流器向变频器网侧传播,将在网侧电流频谱中出现故障特征频率成分。分析电网负序电压对感应电机定子电流、变频器网侧电流的影响,发现电网负序电压分量在网侧电流中形成的故障特征频率与定子故障时的网侧电流故障特征频率存在明显不同,选择容易测取的网侧电流可构成定子故障诊断新判据。实验结果表明:利用变频器网侧电流频谱分析能有效进行定子故障诊断,且不受电网负序电压的影响。
[Abstract]:Put forward a kind of induction motor stator fault diagnosis method of grid side inverter based on current spectrum. When the induction motor stator fault, stator current negative sequence component through the inverter, the rectifier inverter to the network side communication, will appear on the network side of the spectrum of current fault characteristic frequency components. Analysis of grid current negative sequence voltage of induction influence of inverter motor stator, the network side current, there is obvious difference between the fault characteristics of the net side current frequency found fault characteristic frequency and stator fault power system negative sequence voltage component formed on the net side current in the selection of easy to measure the net side current from the stator fault diagnosis can constitute a new criterion. The experimental results show that the analysis can effective stator fault diagnosis using inverter grid side current spectrum, and is not affected by the power of negative sequence voltage.

【作者单位】：湖南城市学院机械与电气工程学院;中南大学信息科学与工程学院;
【基金】：国家高技术研究发展计划项目(2009AA11Z217) 国家自然科学基金(61273158) 湖南省教育厅科究项目(13A011)
【分类号】：TM346
【正文快照】： 0引言感应电机常见的故障主要有转子断条[1-2]、定子定子绕组故障[3-15]等,其中定子匝间短路是电机常见故障之一,其故障率约为40%左右[3]。当感应电机发生定子故障时,较大的短路电流将使短路部分温度升高,引起绝缘层破坏,从而导致严重的电机故障发生。因此,对电机早期故障进行

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