改进型永磁同步电机双矢量MPTC策略

Dual-vector MPTC strategy for improved permanent magnet synchronous motors

为了减小传统双矢量模型预测转矩控制(MPTC)的计算负担和转矩脉动,提升系统的动态性能,本文提出了一种改进型永磁同步电机双矢量MPTC策略。首先,基于12扇区电压矢量图提出了快速电压矢量选择表,预测时迭代次数只需3次。其次,依据转矩脉动最小原则,预先优化候选双矢量的作用时间。最后,设计了由线性自抗扰控制(LADRC)的动态权重系数,提升了系统的动态性能。仿真表明,所提控制策略具有可行性和有效性。

In order to reduce the calculated load and torque pulsation of the predictive torque control(MPTC)for conventional dual-vector model and improve the dynamic performance of the system,this paper proposes a dual-vector MPTC strategy for improved permanent magnet synchronous motors.First,a fast voltage vector selection table is proposed based on the 12-sector voltage vector map,and only three iterations are required for prediction.Secondly,the action time of candidate dual vectors is pre-optimized based on the principle of minimum torque pulsation.Finally,the dynamic weight coefficient is designed by the Linear Active Disturbance Rejection Control(LADRC)to improve the dynamic performance of the system.The simulation result shows that the proposed control strategy is feasible and effective.