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高压电器  2015 

隔离开关操动机构电机输出轴扭矩和电流关系的研究

, PP. 139-144

Keywords: 隔离开关, 机械故障, 扭矩监测, 电机电流包络

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Abstract:

为了通过电机电流检测隔离开关的机械故障,对GW6H-252型隔离开关电机输出轴扭矩和电机相电流的关系进行研究。研制出一套电流监测系统,现场监测隔离开关动作过程中电机定子相电流和电机输出轴扭矩,采用希尔伯特变换提取电流包络,建立电机输出轴扭矩和电流包络的函数关系,并采用最小二乘法进行曲线拟合。研究结果表明,GW6H-252型隔离开关电机输出轴扭矩和电机相电流包络之间存在二次函数关系,函数相关度高达0.98,因此可以通过监测电机定子相电流对电机输出轴扭矩峰值进行预测,进而检测隔离开关机械故障。

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