Control, Monitoring and Reliability of the Systems, Higher School of Sciences and Technology of Tunis, University of Tunis, 5, Taha Hussein Street-Tunis, Postal Box 56, Bab Menara 1008, Tunisia.
ISA Trans. 2013 Nov;52(6):888-99. doi: 10.1016/j.isatra.2013.07.011. Epub 2013 Aug 12.
For an induction machine, we suggest a theoretical development of the mechanical unbalance effect on the analytical expressions of radial vibration and stator current. Related spectra are described and characteristic defect frequencies are determined. Moreover, the stray flux expressions are developed for both axial and radial sensor coil positions and a substitute diagnosis technique is proposed. In addition, the load torque effect on the detection efficiency of these diagnosis media is discussed and a comparative investigation is performed. The decisive factor of comparison is the fault sensitivity. Experimental results show that spectral analysis of the axial stray flux can be an alternative solution to cover effectiveness limitation of the traditional stator current technique and to substitute the classical vibration practice.
对于感应电机，我们建议对机械不平衡效应对径向振动和定子电流的分析表达式进行理论推导。相关频谱进行了描述，并确定了特征缺陷频率。此外，还为轴向和径向传感器线圈位置开发了杂散磁通表达式，并提出了一种替代诊断技术。此外，还讨论了负载转矩对这些诊断媒介检测效率的影响，并进行了比较研究。比较的决定性因素是故障灵敏度。实验结果表明，轴向杂散磁通的频谱分析可以作为替代传统定子电流技术的有效解决方案，以替代经典的振动实践。
