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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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Keywords: 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

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Abstract:

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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