Discrete-time modeling of AC motors for high power AC drives control

This paper proposes a new discrete‐time formulation of state‐space model for voltage source inverter (VSI) fed AC motors, introducing the free evolution of the motor state and characterized by both the simplification of torque and flux output equations and the definition of a predictive reference frame oriented on the rotor free evolution vector. The potential of the proposed model for high dynamics discrete‐time controller synthesis is illustrated through an application to SM‐PMSM.