Nonlinear Flatness-Based Controller for Permanent Magnet-Excited Synchronous Motor

This paper addresses the problem of nonlinear discrete-time flatness-based controller design for a Permanent Magnet-Excited Synchronous Motor (PMSM). To eliminate the static errors of the system state variables and consider the nonlinear characteristics of a PMSM, a cascaded flatnessbased control scheme is proposed. Simulation results are provided to illustrate the effectiveness of the proposed control structures, in terms of better performance.