Improved superhelical sliding mode observer position sensorless control of pmsm/matlab simulink

Improved superhelical sliding mode observer position sensorless control of permanent magnet synchronous motor

An improved super-helical sliding mode observer is used for permanent magnet synchronous motor position sensorless control. This observer adds a linear term of the observation error based on the traditional STA-SMO, which enhances the dynamic performance of the system modal approach process. and anti-interference ability. In addition, an adaptive law is designed for estimating back electromotive force, replacing the use of traditional LPF, and the estimation accuracy is greatly improved.