基于电流分析的四相开关磁阻电机气隙偏心故障综合检测方法

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Abstract Air-gap eccentricity fault is one of the common faults in switched reluctance motor, that easily results to unbalanced magnetic pull, and makes vibration and noise worsen and affects output performance of SRM. This paper firstly obtains the function relation between air gap length and the non-excited phase current based on the circuit equations of SRM, and then uses 2D-TFEM to calculate non-excited phases current under motor in the normal state and different eccentric level, and presents a new detection method of air gap eccentricity fault that makes the difference of non-excited phase current as eigenvalues. This method can realize comprehensive detection about occurrence of the fault and its location and type. Compared to the other methods, the simulation and experimental results show that the method needs no additional circuit and sensor, saving the testing cost and has high accuracy, reliability and robustness.

Key words： Air-gap eccentricity sine pulse injection method current difference comprehensive detection switched reluctance motors

Received: 08 July 2013 Published: 10 April 2015

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TM315

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	Articles by authors
	Xiao Li
	Fan Shurui
	Liu Weipeng
	Shen Fang

Cite this article:

Xiao Li,Fan Shurui,Liu Weipeng等. Fault Detection Method of Air Gap Eccentricity for Switched Reluctance Motors Based on Analysis of Current[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 122-132.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I6/122

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