An improved spectral analysis of the stray flux component for the detection of air-gap irregularities in squirrel cage motors

作者：Salah Mohamed^*; Bacha Khmais; Chaari Abdelkader

来源：ISA Transactions, 2014, 53(3): 816-826.

DOI：10.1016/j.isatra.2014.02.001

• Condition monitoring
• Eccentricity
• Fault diagnosis
• Induction motor
• Stray flux

For machines' monitoring purpose, the classical motor current signature analysis has shown its weakness in distinguishing the eccentricity occurrence in presence of others mechanical faults. Although Park's vector approach can cover this drawback, the high cost due to the requirement to use three current sensors associated with an advanced processing technique, makes it less desired by industrialists. In this paper, we suggest an alternative diagnosis method based on a suitable processing of the stray flux data. The experimental results have revealed the potential of a simple search coil for the detection and the distinction of the accurate eccentricity nature even in presence of similar mechanical faults.

• 出版日期2014-5