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首页> 外文会议>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：使用高分辨率光谱分析的感应电机中初始损坏转子杆的启动电流分析

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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：本文呈现了一个破碎转子 - 条时频进化效果的实验研究，当通过逐渐钻一个孔，每三毫米，从健康逐渐钻一个孔，直到转子杆破裂，当杆在感应电动机中被部分断开时。使用提供高分辨率的短时多信号分类（音乐）方法，分析了三个部分破碎的条件（0mm，3mm，6mm和10mm）中的每一个的一个相电流启动瞬态。获得信号的时频伪表示，其中发生故障相关的频率以及它们在时频谱中的发展方式。结果表明，随着缺陷的增加，一个转子杆的逐步钻孔在故障频率中产生变速。电源频率周围的边带组件相对于来自健康转子条条件的那些从健康转子杆上获得常规故障演化，直到杆完全破裂。

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