Comparison of Optimal Control Trajectories of IPMSMs with Different Saliency Ratios

In this paper, comparative analysis of optimal control trajectories in synchronous reference stator current plane for IPMSMs with different saliency ratios is given. By means of optimal control, the research is focused on maximization of torque producing capability regarding the current and voltage constraints imposed by the drive limitations. Comparison is performed using numerical simulations of two IPMSMs with different saliency ratios but comparable torque and power ratings.