关键词: 永磁同步电动机, 有限控制集, 模型预测控制, 电流控制, 三矢量, 滑模观测器

Abstract: Aiming at the problem that the three-vector finite set model predictive control system of permanent magnet synchronous motor is highly dependent on the motor rotor information, an improved sliding mode observer was used to observe the motor rotor information. The new approach rate function was used substitute the symbol function to weaken the chattering phenomenon of the system. The filter in the synchronous reference coordinate system was used to compensate the phase lag, and enhance the filtering effect. The accurate observation of rotor position and angular velocity was realized. The simulation and experimental results show that the control method adopted can achieve good stability and improve the control performance of the system.

Key words: permanent magnet synchronous motor ( PMSM ), finite control set ( FCS ), model predictive control ( MPC), current control, three-vector, sliding mode observer( SMO)