Investigations of algorithms for bearing fault detection in induction drives

Comparison between vibration and stator current analysis for the detection of bearing faults in asynchronous drives

“…A large overview of electrical machines failures and monitoring technics can be found in [1]. A classification of the most frequently encountered faults can be found in [2]. To improve the availability and reliability of the drive, a condition monitoring could be implemented to favour the predictive maintenance.…”

On-Line System for Fault Detection in Induction Machines Based on Wavelet Convolution

“…Mechanical faults [1][2][3][4][5][6][7][8][9][10]: * broken rotor bars [1][2][3] * bearing damage [4][5][6] * dynamic eccentricity [7] Electrical Faults: * Single or multiple phase short circuits. * Open phase.…”

“…iR =VX I cos2z fs±t .f2bCos (2Zrfb b)±+2If COS (2Z ff1 Pf) (5) is =12aIcos(2fst-2z 13)+ X2lb2cos (2wfb-2z/ 3 Qb) (6) +2If cos(2zff 2z 3 -fr) iT=V2Icos(2zfst+2z13)+ V2Ibcos(2zrfb±+2z3 (b) ( Next approach shows how by using different wavelet functions could be used as a band pass filters, convoluting and scaling them fault detection method could be easy implemented on Microprocessor or DSP embedded system.…”

On-Line System for Fault Detection in Induction Machines based on Wavelet Convolution

“…Mechanical faults [1][2][3][4][5][6][7]: broken rotor bars bearing damage dynamic eccentricity Electrical Faults [8][9]:…”