关键词: 永磁同步电机, 预测控制, 效率优化, 价值函数

Abstract: In order to make full use of Permanent Magnet Synchronous Motor（PMSM） reluctance torque, it proposes a Maximum Torque Per Ampere（MTPA） method of PMSM. The discrete predictive model of electromagnetic torque is established first, then it focuses on the internal mechanism and typical problems of MTPA optimization. And then it builds a predictive control cost function, which contains of electromagnetic torque tracking, MTPA optimization as well as the system current limitation. The cost function can adaptively identify the dynamic and steady state condition of PMSM speed control system online. And according to the corresponding identification results highlight the optimization goal, it realizes the global optimal control of PMSM speed control system. Matlab/Simulink results show that the method can improve the efficiency of PMSM speed control system, at the same time it retains some advantage of predictive control, such as multi-objective optimization and high dynamic response. In addition, the method shows a strong robustness when the motor parameters are changed in realizing the MTPA optimization control.

Key words: permanent magnet synchronous motor, predictive control, efficiency optimization, cost function