基于二自由度 PI 控制的永磁同步电机仿真分析

摘要

构建了永磁同步电机 d －q 坐标系下的数学模型，并结合矢量控制方法在 Matlab ／Simu-link 仿真环境下对采用的控制方法进行建模。针对传统的 PI 控制系统不能使系统的目标跟随特性和抗干扰性同时最优，提出二自由度 PI 控制的策略，实现永磁同步电机的目标跟随和抗干扰能力双优控制。通过仿真结果分析，得出相比传统 PI 控制，基于双自由度 PI 控制器的永磁同步电机具有良好的抗负载干扰和目标值跟随的能力。%Combined with a mathematical model and vector control for permanent magnet synchronous motor, and the simulation model of PMSM is established in Matlab /Simulink environment.For conventional PI control can not met the target following characteristic and the anti interference characteristics at the same time.Puts forwards two degrees of freedom PI control strategy,it can satisfies the above two kinds of control request.Through simulation re-sults,Theoretically verify PI speed controller with dual degrees of freedom on the overshoot and anti -interference a-bility loads better than conventional PI controller.