基于SVD滤波技术与快速四阶累积量ESPRIT算法的异步电动机转子断条故障检测新方法

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Abstract A new method for detecting broken rotor bar fault(BRB) in induction motors is proposed which is based on the combination of singular value decomposition(SVD) filter, speedy fourth-order cumulants(SFOC) and estimation of signal parameters via rotational invariance technique (ESPRIT). Simulations of BRB show that SVD filter can effectively filter out the fundamental component and background noise in stator current signals, and thus, highlight the BRB feature component. On the other hand, ESPRIT based on fourth-order cumulants can effectively reduce the noise interference, extend signal array, and hence, extract BRB feature component with a high frequency resolution. Especially, the combination of SVD and ESPRIT based on fourth-order cumulants shows a promising benefit on extracting BRB feature component with a high resolution even with short-time signals available. Additionally, in order to speed up ESPRIT based on fourth-order cumulants, a reduction algorithm is proposed to eliminate redundant data of the uniform linear array DOA(direction of arrival) estimation, thus greatly reducing the calculation amount of this kind of ESPRIT. As a result of this, SFOC-ESPRIT is yielded as a new type of ESPRIT. At last but not least, by combining SVD and SFOC-ESPRIT, a detection method for BRB in induction motors is presented. A series of experiments are conducted to verify the presented detection method.

Key words： Induction motor broken rotor bar fault singular value decomposition filter speedy fourth-order cumulants estimation of signal parameters via rotational invariance technique

Received: 11 August 2014 Published: 29 June 2015

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TM315

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	Sun Liling
	Wang Xu
	Xu Boqiang

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Sun Liling,Wang Xu,Xu Boqiang. A Detection Method for Broken Rotor Bar Fault in Induction Motors Based on SVD and SFOC-ESPRIT[J]. Transactions of China Electrotechnical Society, 2015, 30(10): 147-156.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I10/147

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