A Balancing Trajectory Combining MTPA and LMC

This paper proposes a trajectory for achieving a balance between loss minimization control (LMC) and maximum torque per ampere (MTPA) control. This proposed approach introduces a weighting factor for core loss consideration, which is determined by the load torque. The effectiveness of the proposed trajectory is verified using two distinct Interior Permanent Magnet Synchronous Motors (IPMSMs). The motor's maximum torque and total electrical loss with the proposed method are compared with the existing LMC and MTPA methods. The results show that the proposed method can reach the same maximum torque as MTPA while nearly matching the efficiency of LMC under different conditions.