Online loss-minimizing control method of interior permanent-magnet synchronous motors

This paper presents a simple online loss minimizing control method for interior permanent magnet synchronous motors IPMSM in constant torque region. Due to novel simplifications of the model equations this method can easily be implemented even on a simple controller with limited resources adjusting optimal stator current trajectories and ensuring the most efficient machine operation. The striking feature of the presented algorithm is the very limited implementation effort which avoids any offline calculations and characteristic curve evaluations as well as complex iteration procedures. The effectiveness of the proposed algorithm is proved by corresponding experimental results.