中文摘要：

为进一步提高永磁同步电动机滑模观测器的位置估算精度,提出了一种改进的滑模观测器永磁同步电动机无传感器矢量控制方法.利用饱和函数,消弱滑模变结构系统中的抖振,构建反电势观测器代替传统方法中的低通滤波器;并利用Lyapunov定理证明观测器的收敛性,改进了传统的滑模观测器算法.采用MATLAB建立了无传感器永磁同步电动机矢量控制仿真模型,并搭建了实验平台进行实验验证,仿真及实验结果表明改进的滑模观测器提高了估算精度和系统控制性能.

英文摘要：

An improved sliding mode observer for sensorless vector control of PMSM was presented to improve estimation accuracy of sliding mode observer of permanent magnet synchronous motor （PMSM）.The saturation function was introduced to the observer to overcome chattering and the observer of back electromotive force was instead of low-pass filter in traditional method.The Lyapunov theorem was used to prove the convergence of the observer.The simulation model of sensorless vector control of PMSM was established in MATLAB,and the corresponding experiment platform based DSP was set up.The simulation and experimental results show that the improved sliding mode observer is able to improve the estimation accuracy as well as the control quality.