Direct Speed Model Predictive Control with two-time scale for PMSM Drives

This paper proposes a novel Direct Speed Model Predictive Control (DSMPC) for PMSM drive. The developed strategy takes into consideration the difference between the electromagnetic and mechanical time constant. The predictions with different sampling periods in speed and current models of PMSM are analyzed in detail. Meanwhile, the linear estimation method is employed to avoid the large amount of calculation of torque prediction. The load torque observer and delay compensation are achieved as well. Compared with the traditional DSMPC in simulations and experiments, the proposed strategy shows a better performance.