关键词: 永磁同步电机, 最优目标工作点, 最大转矩电流比, 模型预测控制, 电流迭代控制

Abstract: In view of the problem that the loss of permanent magnet synchronous motor (PMSM) is greatly affected by current, there is little literature on how to achieve optimal current under the premise of satisfying motor torque demand and speed regulation demand. An optimized current iterative control algorithm for PMSM permanent magnet synchronous motor was proposed. Through the algorithm, the optimal target operating point was selected at a given torque and speed. The nonlinear characteristic curve was solved numerically by iterative method. The calculation amount was small and the optimal stator current can be obtained. At the same time, combined with the designed model predictive controller (MPC), the current predicted value of the permanent magnet synchronous motor was optimized and the actual output value was controlled. The simulation and experimental results show that the optimized PMSM current iterative control algorithm can further reduce motor loss and improve the stability and accuracy of current control.

Key words: permanent magnet synchronous motor (PMSM), , optimal target work point, , maximum torque per ampere (MTPA),, model predictive control (MPC), , current iterative control