Early broken rotor bar detection techniques in VSD-fed induction motors at steady-state

R. Romero-Troncoso, D. Morinigo-Sotelo, Ó. Duque-Pérez, P. E. Gardel-Sotomayor, R. Osornio-Rios, A. García-Perez
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引用次数: 16

Abstract

Condition monitoring has become necessary to detect failures in induction motors (IM) where the detection of incipient faults is of great concern. However, the detection of partially-broken rotor bars at an early stage is not so easily achieved. Therefore, it is necessary to use suitable condition monitoring accompanied with signal processing techniques to detect partially-broken rotor bar. This paper presents a comparative study of various condition monitoring methods accomplished for IM with the aim of early detection of one partially-broken rotor bar by steady-state current spectrum analysis and different supply conditions, such as two different variable speed drives providing three fundamental supply frequencies, and the line supply case. The study includes three different load conditions for each case. Results show that the most accurate and robust analysis methodology for early detection of broken rotor bars under different supply conditions, fundamental supply frequencies and load conditions during steady-state analysis, are the subspace methods.
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vsd异步电动机稳态早期断条检测技术
状态监测已成为感应电机故障检测的必要条件,其中早期故障的检测是非常重要的。然而,在早期检测转子部分断条是不容易实现的。因此,有必要采用适当的状态监测并结合信号处理技术对转子部分断条进行检测。本文比较研究了IM的各种状态监测方法,目的是通过稳态电流谱分析和不同的供电条件,如两个不同的变速驱动器提供三个基本供电频率,以及线路供电情况,来早期检测转子部分断条。研究包括三种不同的荷载条件下,每个情况。结果表明,在稳态分析中,子空间法是在不同供电条件、基本供电频率和负载条件下早期检测转子断条最准确、鲁棒性最好的分析方法。
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