同步旋转坐标系下新型滑模观测器算法的研究

Research on a New Sliding Mode Observer Algorithm in Synchronous Rotating Coordinate System

针对基于永磁同步电机(PMSM)滑模观测器无位置传感器抖动问题,采用锁相环估计同步电机转子位置和速度,将滑模观测器(SMO)感应电势和锁相环(PLL)结合一体。新型滑模观测器算法能减少转子位置、转速估算误差和复杂度。最后,利用MATLAB仿真对同步坐标系下新型滑模观测器算法进行验证,实验结果表明新型滑模观测器算法对比传统滑模观测器在一定程度上能抑制抖动,动态与控制性能均有所提高。

Aiming at the problem of sensorless jitter based on permanent magnet synchronous motor(PMSM)sliding mode observer,a phase-locked loop is used to estimate the rotor position and speed of synchronous motor,and the induced emf of sliding mode observer(SMO)is combined with phase-locked loop(PLL).The novel sliding mode observer algorithm can reduce the estimation error and complexity of rotor position and speed.Finally,MATLAB simulation is used to verify the novel sliding mode observer algorithm in synchronous coordinate system.The experimental results show that the proposed algorithm can suppress jitter to a certain extent and improve the dynamic and control performance compared with the traditional sliding mode observer.