Optimal design and vector control of an interior ferrite permanent magnet synchronous motor

Considering that the magnetic performance of the ferrite magnet is relatively weak, an interior ferrite Permanent magnet synchronous motors (PMSM) with reliable flux-focusing structure is presented in this paper. An optimal maximum torque per ampere (MTPA) control strategy is proposed, which fits the variation of core saturation and winding inductances. In order to simplify the computation complexity and to obtain a good performance over the full load range, an optimal three-segmented control strategy is proposed. Analysis results show that the optimized motor and the control strategies can perform well under various loads.