A simulation about PMSM sensorless control based on simulink This simulation is about Sliding Mode Obverser.This is a very common control scheme of positionless motor in the industry. There are two types of SMO:
- First Order SMO:it is easy to achieve but need a filter to get the rotor position
- Super Twisting SMO:Solving the sign function and saturation function makes the observation make the Angle vibration of observation smaller and smoother.In addition, the low-pass filtering and phase compensation necessary for the traditional first-order sliding mode are deleted, and the dynamic response of the whole system is higher because there is no filter involved
Personally, I prefer higher order sliding mode