Transient motor current signature analysis via modulus of the continuous complex wavelet: A pattern approach
| Autor: | Pineda Sánchez, Manuel, Riera Guasp, Martín, Pérez Cruz, Juan, Puche Panadero, Rubén |
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| Rok vydání: | 2013 |
| Předmět: |
Engineering
Renewable Energy Sustainability and the Environment business.industry Energy Engineering and Power Technology Wavelet transform Bilinear time–frequency distribution Fault (power engineering) Wavelet transforms symbols.namesake Signal analysis Fuel Technology Fourier transform Wavelet Induction motors Nuclear Energy and Engineering Harmonics symbols Electronic engineering INGENIERIA ELECTRICA Complex wavelet transform business Algorithm Fault diagnosis Induction motor |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2013.04.002 |
| Popis: | In this paper a new method to perform Transient Motor Current Signature analysis (TMCSA), based on the Continuous Complex Wavelet Transform (CCWT) of the line current, is presented. TMCSA is a powerful online method for diagnosing motor faults. Unlike traditional MCSA methods, based on the Fourier Transform (FT) of the stator currents in stationary regime, it can identify not only the presence of current harmonics that are characteristic of each motor fault, but also their unique time–frequency evolution pattern. This feature greatly increases its reliability, helping to discard non-fault related harmonics like those generated by periodic loads or voltage unbalances. In the case of a machine with broken bars, the representation in the time–frequency plane of the left sideband harmonic during the startup transient (LSHst) constitutes such a clear fault pattern. Mathematical tools that are able to characterize non-stationary signals are needed in TMCSA, such as the CCWT. It is a highly redundant transformation of the current signal into the time–frequency domain, and its modulus is used in this paper to generate a high resolution graphic pattern of the fault. Experimental results obtained on a 1.1 kW three-phase squirrel-cage induction motor with broken bars are discussed. |
| Databáze: | OpenAIRE |
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