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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Time to Fault Minimization for Induction Motors Using Wavelet Transform
verfasst von : Amirhossein Ghods, Hong-Hee Lee
Erschienen in: Intelligent Computing Methodologies
Verlag: Springer International Publishing
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Time to Fault (TTF) is an important parameter that measures how long it takes that a fault detection algorithm successfully recognizes defect in the motor. If TTF is too long, severe damages can happen to the motor. In this paper, authors try to minimize TTF using Discrete Wavelet Transform (DWT); in other words, the output signals derived from the motor due to an existing fault are analyzed and decomposed in frequency-domain. It will be proved that even though there are
n
levels for decomposing the signal with
2
n
data samples, but after a specific level, the fault characteristics will disappear. This happens because of sporadic form of the signal. Thus, we can finish the analysis in a lower level where all characteristics for fault can be seen. This reduces TTF and consequently possible damages considerably.