Finite set model predictive MTPA control with VSD method for asymmetric six-phase PMSM

This paper investigated and compared two types of modified model predictive control methods with finite set for six-phase PMSM MTPA control. The first one has conventional cascaded speed and current controller loops where the PI current loop is replaced with a MPC control loop. The second method uses one MPC controller in place of conventional cascaded loops for both speed and current control. The MPC method is adopted for fast current response and the ability of dealing with multi-variables. Therefore, partial current harmonics in xy sub-plane can be suppressed with the cost function according to vector space decomposition theory. By designing the cost function, the MTPA operation can be implemented.