Maximum Torque per Ampere and Field-weakening Controls for the High-Speed Operation of Permanent-Magnet Assisted Synchronous Reluctance Motors

Because of the high-torque's capability and power factor as well as high-speed flux-weakening region operation, the permanent-magnet assisted synchronous motor (PMA-SynRM) is a right candidate for the next generations of electric vehicles (EVs) and hybrid electric vehicles (HEVs). The maximum torque per ampere (MTPA) control scheme of the PMA-SynRM presented in this paper can be used to minimize the copper losses of the system and utilize the field-weakening control scheme. A small-scale “1 kW prototype PMA-SynRM” was designed and manufactured to test and examine the proposed control in the laboratory. The proposed algorithm was digitally carried out using the MicroLab Box dSPACE. Based on the simulation and experimental results, the performance of the proposed control scheme was determined.