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永磁同步电机负载转矩观测器

, PP. 30-36

Keywords: 负载转矩观测器,Luenberger观测器,Kalman滤波器,永磁同步电机,二自由度,控制器,前馈补偿

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Abstract:

负载转矩的扰动会影响永磁同步电机控制系统的性能,测量或者观测负载转矩并用作前馈补偿,形成二自由度控制器可以减小负载转矩扰动的影响。本文研究分析了几种实用的永磁同步电机负载转矩观测器,可以根据测量的电流、机械位置和转速等准确观测负载转矩,不增加额外的硬件设备。全阶负载转矩观测器还可以根据机械传感器的输出量观测准确的转子位置和转速,代替了传统的转速计算方法,避免了微分计算,减小了测量噪声和离散误差的影响。以基于Kalman滤波器的负载转矩观测器为例,对观测器和前馈补偿的性能进行了仿真和实验验证。

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