基于瞬时无功功率感应电机转子断条故障诊断研究

发布时间：2018-05-16 20:55

本文选题：瞬时无功功率 + 感应电机　；参考：《电机与控制学报》2014年09期

【摘要】：在基于定子电流信号进行异步电机故障诊断时,转子断条故障特征频率分量常常被电流的基频分量淹没。针对这种情况,本文提出一种新型的基于瞬时无功功率的转子断条故障诊断方法。该方法首先对定子电压和电流进行Hilbert变换,然后在此基础上构建瞬时无功功率。通过对无功功率进行频谱分析,选取特征频率2ksf作为转子断条的故障诊断判据。同时定义一个新的故障严重程度系数,对感应电机转子故障严重程度进行判别。实验结果表明该方法能有效进行转子断条故障诊断。与传统的Hilbert模量方法和瞬时功率方法相比,该方法因没有交叉项而频谱简单;只需采集单相电流,不需要进行坐标变换,简化了硬件和软件,节省计算时间。
[Abstract]:In the fault diagnosis of asynchronous motor based on stator current signal, the characteristic frequency component of rotor broken bar fault is often submerged by the fundamental frequency component of the current. In this paper, a new fault diagnosis method based on instantaneous reactive power is proposed. Firstly, the stator voltage and current are transformed by Hilbert, and then the instantaneous reactive power is constructed. Based on the spectrum analysis of reactive power, the characteristic frequency 2ksf is selected as the fault diagnosis criterion of rotor bar break. At the same time, a new fault severity coefficient is defined to distinguish the rotor fault severity of induction motor. The experimental results show that this method can effectively diagnose rotor bar breakage. Compared with the traditional Hilbert modulus method and instantaneous power method, the proposed method is simple in spectrum because it has no crossover terms, and only needs to collect single-phase current without coordinate transformation, which simplifies the hardware and software and saves calculation time.
【作者单位】：湖南城市学院;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) 湖南教育厅科究项目(11C0725)
【分类号】：TM346

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