永磁同步电动机无传感器滑模观测运行

Sensorless Sliding Mode Observation Operation of Permanent Magnet Synchronous Motor

针对永磁同步电动机的无传感器运行,优化直接转矩系统的控制性能,同时,利用非奇异终端滑动模态观测器替代传统的滑动模态观测器,改进了原有的滑模观测方法。在引入非奇异终端理论与滑动模态相结合的观测理论控制系统中,通过估算反电动势来推算出转子的速度和位置,使系统达到无传感器控制的目的。仿真和实验表明,新型滑模观测运行系统能够获得更高的估算精度和更好的动态指标。

The direct torque control （ DTC） method was optimized for the sensorless operation of permanent magnetsynchronous motor （PMSM）. Meanwhile, the non-singular terminal sliding mode observer was taken instead of the traditionalsliding mode observer, improving the original sliding mode observer. In the control system combing the non-singularterminal with sliding mode observer, the back EMF was estimated to calculate the rotor＇s speed and position, thus makingthe system achieve the goal of sensorless control. Simulation and experimental results show that the control system with newsliding mode observer can achieve higher estimation accuracy and better dynamic performance.