NDLI: Novel diagnosis technique of mass unbalance in rotor of induction motor by the analysis of motor starting current at no load through wavelet transform

Content Provider	IEEE Xplore Digital Library
Author	Ahamed, S.K. Karmakar, S. Mitra, M. Sengupta, S.
Copyright Year	2010
Description	Author affiliation: Department of Applied Physics, University of Calcutta, Kolkata, India (Karmakar, S.; Mitra, M.; Sengupta, S.) \|\| Govt. College of Engineering & Textile Technology, Serampore, West Bengal, India (Ahamed, S.K.)
Abstract	This paper presents an improved technique for detection of mass unbalance in rotor of an induction motor by the analysis of transient stator current during starting period using both discrete wavelet transform (DWT) and continuous wavelet transform(CWT). The unbalanced magnetic pull due to centrifugal force developed for mass unbalance in rotor produces excessive vibration in the rotor as well as in the stator, resulting changes in air gap flux distribution which induces voltage in the rotor and in the stator and generation of unique signature pattern in the stator current. During starting, unbalanced magnetic pull is very high, the rotor is pulled across the whole air gap which increases the amplitudes level of the harmonics already present and generation of new harmonics due to this fault in the stator current. In the present paper, the starting current at no load is captured and analysed for diagnosing the motor fault. As motor current signature (MCS) significantly depends on loading condition of the induction motor during steady state, the detection of faults using MCS at no load or light load by FFT technique is difficult. This has been overcome by this proposed improved technique as motor current does not depend on load and is very high even at no load during starting. This technique has been developed and implemented in the laboratory using machine fault simulator.
Starting Page	474
Ending Page	477
File Size	884148
Page Count	4
File Format	PDF
ISBN	9781424462773
e-ISBN	9781424462803
DOI	10.1109/ICELCE.2010.5700732
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-18
Publisher Place	Bangladesh
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Induction motors Rotors Continuous wavelet transforms Discrete wavelet transforms Transient analysis Wavelet analysis Mass Unbalance in rotor FFT Induction motor MCS Wavelet Transform
Content Type	Text
Resource Type	Article

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