基于Super-Twisting滑模观测器的永磁同步电机无传感器控制

针对永磁同步电机矢量控制系统的高性能要求，提出一种基于二阶super-twisting滑模理论的永磁同步电机转子反电动势观测器.对电机反电动势观测值进行运算处理得到电机转子位置与转速，并采用矢量控制对电机转速进行控制，从而实现永磁同步电机的无传感器控制.根据Lyapunov稳定性理论，该观测器的收敛特性，super-twisting算法相比于传统一阶滑模算法极大地削弱了系统的抖振，降低系统超调的同时减小了系统调整时间.仿真和实验结果均表明该方案可有效实现转子位置与转速的估算，且系统具有良好的鲁棒性和动态响应能力.

Super-Twisting Sliding Mode Observer Based Sensorless Control of PMSM

In order to realize the high performance requirements of permanent magnet synchronous motor(PMSM) vector control system， a reverse electromotive force (EMF) observer of PMSM based on super-twisting second order sliding mode theory is proposed. The rotor position and speed of the PMSM can be obtained by computing the observed value of the reverse electromotive force. The vector control is used to control the motor speed so as to realize the sensorless control of PMSM. According to the Lyapunov stability theory， the convergence property of the observer is proved.In addition， compared with the traditional first-order sliding mode algorithm， the super-twisting algorithm greatly weakens the chattering of the system， and reduces the overshoot adjustment time of the system. The simulation and experiment results show that the scheme can estimate the rotor position and speed effectively， and the system has good robustness and dynamic response ability.