Selected Rolling Bearing Fault Diagnostic Methods in Wheel Embedded Permanent Magnet Brushless Direct Current Motors

Marcin Skora, Pawel Ewert and Czeslaw T. Kowalski
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Marcin Skora: Department of Electrical Machines, Drives and Measurements, Wrocław University of Science and Technology, 50-370 Wroclaw, Poland
Pawel Ewert: Department of Electrical Machines, Drives and Measurements, Wrocław University of Science and Technology, 50-370 Wroclaw, Poland
Czeslaw T. Kowalski: Department of Electrical Machines, Drives and Measurements, Wrocław University of Science and Technology, 50-370 Wroclaw, Poland

Energies, 2019, vol. 12, issue 21, 1-19

Abstract: In recent years, the number of outer rotor permanent magnet brushless direct current (PM BLDC) motor drives has been intensively growing. Due to the specifics of drive operation, bearing faults are especially common, which results in motor stoppage. In a number of these types of motor applications, the monitoring and diagnostics of bearing conditions is relatively rare. This article presents the results of research aimed at searching for simple and simultaneously effective methods for assessing the condition of bearings that can be built into the drive control system. In the experimental research, four vibration signal processing methods were analysed with regards to the identification accuracy of fault symptoms in the geometric elements of bearings (characteristic frequencies). The results are presented for three cases of bearing faults and compared with a new bearing, they were obtained based on a vibration signal analysis using the classical fast Fourier transform (FFT), Fourier transform of signal absolute values, Fourier transform of an envelope signal obtained using the Hilbert transform, and the Fourier transform of a signal filtered with the Teager–Kaiser energy operator (TKEO).

Keywords: permanent magnet brushless direct current motor; bearing faults; fast Fourier transform; Hilbert transform; Teager–Kaiser energy operator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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