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Constrained Explicit Model Predictive Control with Load State Observer for PMSM Drive System

This paper provides a constrained explicit controller with load torque observer designed for PMSM drive system. Model predictive control(MPC) depends heavily on the precision of the system model, thus, the load changes will affect its control performance. The aim of this article is to design a load state observer to reject the load disturbance and transfer the online optimization of MPC to offline so as to improve the performance of controller. The mathematical model of PMSM system in the synchronous rotating frame is described at first. Based on this, the load torque state observer is created for the explicit MPC controller. Moreover, the block diagram of the proposed method for PMSM system is presented. Finally, the simulation results are presented to clarify that the proposed explicit MPC controller with state observer achieves better performance than that without state observer.