Extended State Observer Based Model Prediction Control for PMSM Field Weakening Control

This paper presents an extended state observer (ESO) based model predictive control (MPC) strategy for regulating the speed of permanent magnet synchronous motor (PMSM) during field weakening control, aiming to optimize the field weakening control performance in the presence of external disturbances and model uncertainty. An extended state observer is utilized to estimate disturbances caused by external disturbances and model parameter uncertainties, as well as nonlinear terms in the equations that are not easily handled. Through the incorporation of disturbance estimation and the anticipation of future disturbances within the prediction horizon, a predictive control law is derived by solving an optimization problem with constrains. Simulation results indicate that the proposed field weakening controller achieves better disturbance rejection, and solve the current and voltage constraints well.