A Strategy for Reducing the Switching and Conduction Loss in FS-MPC System of PMSM based on Dynamic Voronoi Diagram

Finite set model predictive control (FS-MPC) has been widely used in various kinds of power electronic devices. In the optimization strategy of FS-MPC control system, reducing system loss is an important aspect. To achieve this goal, this paper proposes a method to dynamically change the Voronoi diagram of the voltage vector according to the current selected switch state. In this way, loss reduction is feasible by allowing a small number of non-optimal selection of voltage vectors. According to the simulation results of the FS-MPC system of PMSM, the scheme can greatly reduce the switching and conduction loss of the inverter without noticeable negative impact on the overall control performance. The proposed scheme has been verified by experiments in the FS-MPC system of a permanent magnet synchronous motor (PMSM).