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首页> 外文会议>8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics Drives >Startup current analysis of incipient broken rotor bar in induction motors using high-resolution spectral analysis
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Startup current analysis of incipient broken rotor bar in induction motors using high-resolution spectral analysis

机译：高分辨率光谱分析法分析感应电动机中的初生转子断条启动电流

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This paper presents an experimental study of one broken-rotor-bar time-frequency evolution effects, when the bar is partially broken in an induction motor by gradually drilling one hole, each three millimeters, from healthy until the rotor bar is broken. The one phase current startup transient at each of three partially-broken conditions (0 mm, 3 mm, 6 mm and 10 mm) are analyzed, using the short-time multiple signal classification (MUSIC) method that provides a high-resolution and a time-frequency pseudo-representation of the signals, where fault-related frequencies and how they evolve in the time-frequency spectrum are obtained. Results show how the gradual drilling of one rotor bar produces a shifting in the fault frequencies as the defect increases. The sideband components around the supply frequency are shifted with respect to those from a healthy rotor bar condition obtaining a regular fault evolution from a healthy rotor bar until the bar is completely broken.
机译：本文介绍了一种转子转子断条时频演化效应的实验研究，当转子在感应电动机中通过从健康状态逐渐钻出一个孔（每三毫米）直到转子断条而被部分断断时，转子断条。使用短时多信号分类（MUSIC）方法分析了三种部分断开条件（0 mm，3 mm，6 mm和10 mm）中的每一种情况下的单相电流启动瞬变，该方法提供了高分辨率和高灵敏度。信号的时频伪表示，获得故障相关的频率及其在时频谱中的演化方式。结果表明，随着缺陷的增加，一根转子棒的逐渐钻孔如何使故障频率发生偏移。围绕电源频率的边带分量相对于健康转子棒状况下的边带分量发生偏移，从而从健康转子棒获得规律的故障演变，直到棒完全断裂为止。

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