Robust Flatness-based Control with State Observer-Based Parameter Estimation for PMSM Drive

The two new state observers are proposed in this paper to improve the performance and robustness of the flatness-based control against the changeable parameter. The hardware system of the PMSM control is implemented by using a small-scale PMSM of 6-pole, 1-kW, and 3000 rpm in a laboratory, to validate the proposed methodology. Simulation and experimental validation reflect that the two new state observers are better than the linear observer such as extended Luenberger observer (ELO) method regarding convergence for nonlinear systems and convergence rapidity.