Cascaded signal processing approach for motor fault diagnosis
ISSN: 0332-1649
Article publication date: 13 August 2018
Issue publication date: 22 November 2018
Abstract
Purpose
The purpose of this paper is to inspect strategic placing of different signal processing techniques like wavelet transform (WT), discrete Hilbert transform (DHT) and fast Fourier transform (FFT) to acquire the qualitative detection of rotor fault in a variable frequency drive-fed induction motor under challenging low slip conditions.
Design/methodology/approach
The algorithm is developed using Q2.14 bit format of Xilinx System Generator (XSG)-DSP design tool in MATLAB. The developed algorithm in XSG-MATLAB can be implemented easily in field programmable gate array, as a provision to generate the necessary VHDL code is available by its graphical user interface.
Findings
The applicability of WT is ensured by the effective procedure of base wavelet selection, which is the novelty of the work. It is found that low-order Daubechies (db) wavelets show decent shape matching with current envelope rather than raw current signal. This fact allows to use db1-based discrete wavelet transform-inverse discrete wavelet transform, where economic and multiplier-less design is possible. Prominent identity of 2sfs component is found even at low FFT points due to the application of suitable base wavelet.
Originality/value
The proposed method is found to be effective and hardware-friendly, which can be used to design a low-cost diagnostic instrument for industrial applications.
Keywords
Acknowledgements
The authors are thankful to TEQIP-II (IIEST, Shibpur unit) and the Indian Government for their financial support towards the project.
Citation
Panigrahy, P.S. and Chattopadhyay, P. (2018), "Cascaded signal processing approach for motor fault diagnosis", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 37 No. 6, pp. 2122-2137. https://doi.org/10.1108/COMPEL-11-2017-0476
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited