Motor bearing damage detection using stator current monitoring
Motor bearing damage detection using stator current monitoring
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DOI：
10.1109/ias.1994.345491
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发表时间：
1994-10
期刊：
影响因子：
--
通讯作者：
R. R. Schoent-R.;T. G. HabetlerS;F. Kamran;R. G. Bartheld
中科院分区：
文献类型：
--
作者：
R. R. Schoent-R.;T. G. HabetlerS;F. Kamran;R. G. Bartheld
本文讨论了应用电机电流频谱分析检测感应电机滚动轴承的损坏。机械轴承频率的振动监测目前用于检测故障状况的存在。由于这些机械振动与电机的物理气隙的变化相关联，因此气隙磁通密度被调制，并且定子电流以与电源和振动频率相关的可预测频率产生。本文采取的第一步，调查的功效，通过相关的振动和电流频率之间的关系引起的早期轴承故障的轴承故障检测的电流监测。审查了轴承失效模式，并定义了与轴承物理结构相关的特征轴承频率。对定子电流频谱的影响进行了描述，并确定了相关的频率。这是一个重要的结果，在制定的故障检测方案，监测定子电流。实验结果表明，不同的轴承故障的感应电机的振动和电流频谱被用来验证振动和电流频率之间的关系。测试结果清楚地表明，定子电流特征可用于识别轴承故障的存在。>
This paper addresses the application of motor current spectral analysis for the detection of rolling-element bearing damage in induction machines. Vibration monitoring of mechanical bearing frequencies is currently used to detect the presence of a fault condition. Since these mechanical vibrations are associated with variations in the physical air gap of the machine, the air gap flux density is modulated and stator currents are generated at predictable frequencies related to the electrical supply and vibrational frequencies. This paper takes the initial step of investigating the efficacy of current monitoring for bearing fault detection by correlating the relationship between vibration and current frequencies caused by incipient bearing failures. The bearing failure modes are reviewed and the characteristic bearing frequencies associated with the physical construction of the bearings are defined. The effects on the stator current spectrum are described and the related frequencies determined. This is an important result in the formulation of a fault detection scheme that monitors the stator currents. Experimental results which show the vibration and current spectra of an induction machine with different bearing faults are used to verify the relationship between the vibrational and current frequencies. The test results clearly illustrate that the stator current signature can be used to identify the presence of a bearing fault.>