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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摘要气隙偏心故障是开关磁阻电机常见故障之一,易导致电机产生不平衡磁拉力,使振动及噪声恶化,影响电机输出性能。本文基于开关磁阻电机电路方程,得到气隙长度与非励磁相电流的函数关系式,利用2D-TFEM计算电机处于正常状态及不同偏心等级情况下非励磁相电流,通过对比,得到不同情况的相电流差值,并提出一种以非励磁相电流差值为特征量的气隙偏心故障检测方法。该法能够实现偏心故障发生、故障相定位及偏心类型辨别的综合检测。仿真与实验结果表明,该法与其他检测法相比,无需增加任何外加电路及传感器,节约检测成本,且具有较高准确性、可靠性及鲁棒性。

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	肖丽
	范书瑞
	刘卫朋
	申芳

关键词 ：气隙偏心, 正弦脉冲注入法, 电流差值, 综合检测, 开关磁阻电机

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

收稿日期: 2013-07-08 出版日期: 2015-04-10

PACS:

TM315

基金资助:国家科技支撑计划（2011BAA07B04）和河北省自然科学青年基金（F2013202102）资助项目

作者简介: 肖丽女,1987年生,博士研究生,研究方向为工业系统控制及电机控制。范书瑞男,1979年生,讲师,本文通信作者,研究方向为无线传感器网络和嵌入式系统。

引用本文:

肖丽,范书瑞,刘卫朋,申芳. 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[J]. 电工技术学报, 2015, 30(6): 122-132. Xiao Li,Fan Shurui,Liu Weipeng,Shen Fang. Fault Detection Method of Air Gap Eccentricity for Switched Reluctance Motors Based on Analysis of Current. Transactions of China Electrotechnical Society, 2015, 30(6): 122-132.

链接本文:

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

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