基于滑模观测器的永磁同步电机低速下无传感器转子位置检测的研究

Study on the Rotor Position Detection of Sensorless PMSM in Low Speed Region Based on Sliding Mode Observer

该文根据永磁同步电机的基本数学模型,介绍和分析了脉动高频信号注入法的原理,利用李亚普诺夫稳定性定理,以注入的脉动高频电压的响应电流和为抗干扰而新增加的控制项为输入,以转子位置的估计值为输出,设计出一种滑模变结构状态观测器实现对转子位置的估计。仿真实验表明,该滑模状态观测器能实现对电机转子位置和速度的跟踪,且稳定性好,响应快速,对外干扰等不确定因素具有很强的鲁棒性。

According to the mathematic model of the sensorless permanent magnet synchronous motor, tins paper introduced and analysed the basic principle of pulsing high frequency signal injection, and designed a sliding mode variable structure state observer based on the Lyapunov stability theorem with the response current of pulsing high-frequency injected voltage signal and the additional control term for the anti-interference as input, the estimation value of rotor position as output. The simulation results show that this sliding mode observer has very good stability, quick response and strong robustness, and can accurately track the rotor position