永磁同步电机单矢量解耦模型预测转矩控制策略研究

Research on single vector decoupling model predictive torque control strategy for PMSM

针对传统直接转矩控制算法转矩、磁链脉动大,传统模型预测转矩控制算法较为复杂的问题,本文提出了一种单矢量解耦模型预测转矩控制策略。该策略基于永磁同步电机定子磁链坐标系下的数学模型推导出解耦预测模型来优化预测算法,并基于该预测模型设计了延时补偿的单矢量预测控制算法。实验结果表明所提算法可以有效提高控制性能,具体表现在相对传统直接转矩控制所提算法减小了转速、转矩等脉动,提高了动稳态性能。此外,相对传统模型预测转矩控制所提算法在保证相近的稳态性能下,提高了动态响应速度以及降低了计算量。

In order to solve the problems of the traditional direct torque control such as large torque and flux ripples and the huge amount of computation of traditional model predictive torque control,a single vector decoupling model predictive torque control strategy is proposed in this paper.Based on the mathematical model of PMSM in stator flux coordinate system,the decoupling predictive model is derived to optimize the predictive strategy.With the method of delay compensation,the single vector decoupling model predictive torque control strategy is designed.The experimental results show that the proposed strategy can effectively improve the control performance.In detail,compared with the traditional direct torque control,it improves the dynamic and steady performance,such as reducing the torque and flux ripples.In addition,compared with the traditional model predictive torque control,it can significantly improve the dynamic response and reduce the amount of computation on the premise of the similar steady-state performances.