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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Effects of the Simultaneous Presence of Static Eccentricity and Broken Rotor Bars on the Stator Current of Induction Machine
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Effects of the Simultaneous Presence of Static Eccentricity and Broken Rotor Bars on the Stator Current of Induction Machine

机译：静态偏心同时存在和转子条损坏对感应电机定子电流的影响

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摘要

Many papers are available in the literature about detection of faults in induction machines. However, they generally deal only with a single fault. Instead, in practice, the case of mixed faults is quite common: the simultaneous presence of broken rotor bars and an intrinsic eccentricity or a coupling misalignment occurs often in an induction machine. The aim of this paper is to analyze theoretically and experimentally the stator current of an induction machine operating with mixed faults: broken rotor bars and static eccentricity (SE). First, an analytical expression for the mutual inductances under SE is derived using a mixture of modified winding function and Fourier series approach. Then, both theoretical and simulation studies are presented to show how the stator current is influenced by the simultaneous presence of (SE) and broken rotor bars with the consideration of the speed ripple effect. It is demonstrated that, in addition to the well-known characteristic frequencies of broken bars, and the rotor slot harmonic (RSH) used for the detection of (SE), this kind of mixed fault introduces in the stator current a series of additional harmonics, in the form of sidebands centered around the fundamental and RSH. More important, it is shown that some of these harmonics are similar to the frequencies introduced by the mixed eccentricity. Finally, experimental results have been presented to validate the analytical and simulation results.
机译：文献中有许多关于感应电机故障检测的论文。但是，它们通常仅处理单个故障。取而代之的是，在实践中，混合故障是很常见的：转子棒断裂和内在偏心或联轴器不对中的同时存在经常发生在感应电机中。本文的目的是在理论上和实验上分析带有混合故障（转子条断裂和静态偏心率（SE））的感应电机的定子电流。首先，使用修正绕组函数和傅里叶级数方法的混合，得出了SE下互感的解析表达式。然后，进行理论和仿真研究，以显示在考虑速度脉动效应的情况下，同时存在（SE）和转子线断裂的定子电流如何受到影响。结果表明，除了众所周知的断条特征频率和用于检测（SE）的转子槽谐波（RSH）外，这种混合故障还给定子电流引入了一系列附加谐波。 ，以围绕基频和RSH的边带形式。更重要的是，表明这些谐波中的某些谐波与混合偏心率引入的频率相似。最后，给出了实验结果以验证分析和仿真结果。

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