Sensorless Speed Control for SPMSM via Nonlinear Observer and Modified Super-Twisting ADRC

In this paper, a modified super-twisting active disturbance rejection control (MSTADRC) and a nonlinear observer (NOB) are used to implement a sensorless speed control for surface mounted permanent magnet synchronous motor (SPMSM), which has a complex internal structure and is characterized by nonlinear and variable parameters. A new reaching law is designed in super-twisting sliding mode control (STSMC). We proposed the MSTADRC via STSMC and active disturbance rejection control (ADRC). NOB has been selected for estimation of position or angle value. Finally, the validity and effectiveness of this approach are illustrated by simulation.