This paper presents a simple and reliable improved method based on the three-phase current intersection signal (TPCIS), for induction motor rotor fault diagnosis. This method consists of finding time and amplitude of intersection points instead of using the traditional zero-crossing-time technique. TPCIS is constructed by searching and interpolating the positive and negative crossing points of the three-phase currents. After that, a spectral analysis of this signal is performed to extract the rotor fault signature. The proposed method is theoretically introduced and experimentally validated by testing three induction machines under different load conditions. The experimental results show the effectiveness of the proposed method in identifying the examined defect even under low-load conditions.

中文翻译：

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基于三相电流交叉信号的感应电机转子故障诊断

本文提出了一种基于三相电流交叉信号（TPCIS）的简单可靠的改进方法，用于感应电机转子故障诊断。该方法包括寻找交点的时间和幅度，而不是使用传统的过零时间技术。TPCIS 是通过搜索和内插三相电流的正负交叉点来构建的。之后，对该信号进行频谱分析以提取转子故障特征。通过在不同负载条件下测试三台感应电机，对所提出的方法进行了理论介绍和实验验证。实验结果表明，即使在低负载条件下，所提出的方法也能有效识别所检查的缺陷。