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电动车用永磁电机新型观测器设计

, PP. 1527-1534

Keywords: 自动控制技术,无传感器控制,转子磁链,非线性两段扩展卡尔曼滤波器

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Abstract:

在电动汽车永磁同步电机的无传感器控制中,转子磁链值的参数摄动对转子速度和角度的辨识效果影响较大。为此,可以把转子磁链作为变量加入到扩展卡尔曼滤波器中进行辨识,但这会增加运算矩阵的阶数,造成实际系统运算量偏大。为解决这一问题,通过坐标变换的方法将高阶的扩展卡尔曼滤波器分解成为两个并行的低阶卡尔曼滤波器,提出一种用于永磁电机无传感器控制的非线性两段扩展卡尔曼滤波器,并在理论上分析了滤波器所需的乘法加法运算次数。仿真及实验结果表明:与原有传统卡尔曼滤波器相比,该算法减少了一定的运算量并保持了良好的辨识效果。

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