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Fixed Switching Frequency Predictive Control for PMSM Drives With Guaranteed Control Dynamics

In this work, we propose a switched direct model predictive control (DMPC) method for permanent magnet synchronous motor (PMSM) drives; it achieves a fixed switching frequency while preserving fast control dynamics of the DMPC technique. In steady-state operation, the predictive period control (PPC) approach is adopted to carry out fixed switching frequency operation. Meanwhile, during transients, the classical DMPC (CDMPC) method is used to provide fast control dynamics. Furthermore, the criteria to switch between the two modes are presented in detail; these criteria ensure a smooth transition. The proposed method has been verified using a PMSM drive fed by a two-level (2L) voltage source converter. The simulation results confirm its effectiveness.