基于PMSM的二阶滑模无位置传感器控制

在永磁同步电机传统滑模观测器(SMO)无位置传感器控制方案中，针对其因符号函数带来的抖振现象以及因一阶低通滤波器带来的相位滞后问题。根据Super-twisting算法设计了二阶滑模观测器(STASMO)无位置传感器控制方案，该方案不仅有效地抑制了抖振现象，而且取消了一阶低通滤波器的使用。当电机运行时，定子电阻会随着电机内部温度的升高而改变，故设计了合理的定子电阻观测器来实时观测定子电阻，从而避免了定子电阻对无位置传感器控制方案估计精度的影响。最后通过对所提方案进行系统模型搭建与仿真分析，从而证明了所提方案对电机位置和转速具有较高的估计精度。

PMSM Based Second-order Sliding Mode Position Sensorless Control

In the traditional sliding mode observer (SMO) position sensorless control scheme of permanent magnet synchronous motors, the chatter phenomenon caused by the sign function and the phase lag problem caused by the first-order low-pass filter are addressed. A second-order sliding mode observer (STASMO) position sensorless control scheme was designed according to the Super-twisting algorithm. This scheme not only effectively suppressed chattering, but also eliminated the use of a first-order low-pass filter. When the motor is running, the stator resistance will change with the increase of the internal temperature of the motor, so a reasonable stator resistance observer was designed to observe the stator resistance in real time, thereby avoiding the influence of the stator resistance on the estimation accuracy of the sensorless control scheme. Finally, through the system model building and simulation analysis of the proposed scheme, it is proved that the proposed scheme has a high estimation accuracy for the motor position and speed.