永磁同步电机驱动系统的单闭环预测控制研究

Research on Single Closed Loop Predictive Control of Permanent Magnet Synchronous Motor Drive System

广泛应用于永磁同步电机驱动系统的双闭环级PI控制容易出现转速超调和电流畸变,系统的动态控制性能下降,由此引入永磁同步电机驱动系统的单闭环控制结构,对转速和电流同步采样,提高系统的动态性能。使用微分代数法估计系统各种扰动,提高系统的抗干扰性能。同时,在满足系统运行的电压和电流约束条件下,使用预测控制推导出系统控制律,简化永磁同步电机驱动系统的控制结构,便于控制器设计和实际实施。最后,仿真分析证实了所提出控制方法的合理性和可行性。

The dual closed-loop PI control widely used in permanent magnet synchronous motor drive systems is prone to speed overshoot and current distortion,resulting in a decrease in the dynamic control performance of the system.This introduces a single closed-loop control structure for permanent magnet synchronous motor drive systems,which synchronously samples the speed and current to improve the dynamic performance of the system.Use differential algebra to estimate various disturbances in the system and improve its anti-interference performance.At the same time,under the constraints of voltage and current for system operation,predictive control is used to derive the system control law,simplifying the control structure of the permanent magnet synchronous motor drive system and facilitating controller design and practical implementation.Finally,simulation analysis confirmed the rationality and feasibility of the proposed control method.