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Diagnosis and detection of induction-motor rotor dynamic-eccentricity fault

机译：感应电动机转子动偏心故障的诊断与检测

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摘要

Induction motors (IMs) are currently among the most used in variable speed drives due to their high reliability and their low costs. In spite of these qualities, they are more or less penalized by some drawbacks, such as low efficiency, low start-up torque and the likelihood of some rotor failures. Within the last drawback, the paper deals with the diagnosis and detection of the IM rotor dynamic eccentricity fault. Firstly, a dedicated IM model is derived taking into account both healthy and faulty operation cases. Then, simulation works are carried out focusing the IM no-load start-up followed by the application of a load torque at steady-state, considering both healthy and faulty operation cases. A special attention is paid to the analysis of the stator current whose harmonic spectrum highlights some specific frequencies around the fundamental one. These represent signatures for the detection and the localization of the IM rotor dynamic eccentricity fault.
机译：感应电动机（IM）由于其高可靠性和低成本而成为目前在变速驱动器中使用最多的电动机。尽管具有这些特性，但它们还是受到一些缺点的不利影响，例如效率低，启动转矩低以及某些转子发生故障的可能性。在最后一个缺点内，本文讨论了IM转子动态偏心故障的诊断和检测。首先，在考虑正常和错误操作情况的情况下，得出专用的IM模型。然后，进行模拟工作，着重于IM空载启动，然后考虑正常运行状况和故障运行状况，并在稳态下施加负载转矩。要特别注意定子电流的分析，其谐波频谱会突出显示基频附近的某些特定频率。这些代表用于IM转子动态偏心故障的检测和定位的特征。

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