发明名称 |
Fault Detection in Induction Motors Based on Current Signature Analysis |
摘要 |
A method detects faults during a steady state of an operation of an induction motor. The method measures, in a time domain, a signal of a current powering the induction motor with a fundamental frequency and determines, in a frequency domain, a set of frequencies with non-zero amplitudes, such that a reconstructed signal formed by the set of frequencies with non-zero amplitudes approximates the signal measured in the time domain. The determining includes a compressive sensing via searching within a subband including the fundamental frequency of the signal subject to condition of a sparsity of the signal in the frequency domain. The method detects a fault in the induction motor if the set of frequencies includes a fault frequency different from the fundamental frequency. |
申请公布号 |
US2016266207(A1) |
申请公布日期 |
2016.09.15 |
申请号 |
US201514642956 |
申请日期 |
2015.03.10 |
申请人 |
Mitsubishi Electric Research Laboratories, Inc. |
发明人 |
Liu Dehong |
分类号 |
G01R31/34;G01R31/02 |
主分类号 |
G01R31/34 |
代理机构 |
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代理人 |
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主权项 |
1. A method for detecting faults during a steady state of an operation of an induction motor, comprising:
measuring, in a time domain, a signal of a current powering the induction motor with a fundamental frequency; determining, in a frequency domain, a set of frequencies with non-zero amplitudes, such that a reconstructed signal formed by the set of frequencies with non-zero amplitudes approximates the signal measured in the time domain, wherein the determining includes a compressive sensing via searching within a subband including the fundamental frequency of the signal subject to condition of a sparsity of the signal in the frequency domain; and detecting a fault in the induction motor if the set of frequencies includes a fault frequency different from the fundamental frequency, wherein steps of the method are performed by a processor. |
地址 |
Cambridge MA US |