基于高频信号注入的内置式永磁同步电机电感参数辨识

Inductance Identification of Interior Permanent Magnet Synchronous Motor Based on High-Frequency Signal Injection

为了提高内置式永磁同步电机在低速和零速运行时的电感参数的辨识精度,建立了考虑到磁路饱和与交叉耦合影响的内置式永磁同步电机模型,在其他参数未知的情况下,采用注入高频电压信号的算法,通过对纯延时滤波器提取出的高频响应电流进行分析,得到交直轴电感值。仿真结果验证了该电感参数辨识方法的有效性,同时提高了系统对电感参数变化的鲁棒性。

In order to improve the identification accuracy of the inductance parameters of the interior permanent magnet synchronous motor when running at low speed and zero speed, an interior permanent magnet synchronous motor model considering the saturation of magnetic circuit and the influence of cross-coupling was established. Under the condition that other parameters are unknown, the high-frequency voltage signal injection algorithm was used to analyze the high-frequency response currents extracted by the pure time-delay filter, and the inductance of d-axis and q-axis was obtained. The simulation results showed that the method was effective and the robustness of the system was improved when inductance parameters change.