基于模糊PID控制的永磁同步电机控制器研究

摘要

为了提高复杂环境条件下永磁同步电机(PMSM)控制器的动态控制性能与抗干扰能力,分析了永磁同步电机的速度-电流(或力矩)双闭环控制调速结构,提出了一种基于模糊PID控制原理的速度环控制策略;速度环运行时,模糊PID控制器首先将永磁同步电机转速的误差及误差变化率进行模糊化处理,然后依据模糊规则进行模糊推理,并自动在线整定出速度环PID的3个系数(比例系数、积分系数、微分系数),不仅减少了速度环的调节时间,也能增强抵御来自电流环(或力矩环)的干扰;仿真结果表明,当永磁同步电机的转速发生变化或负载发生扰动时,相比于传统的PID控制器,模糊PID控制器能提高系统的动态性能与鲁棒性;该方法用于永磁同步电机的控制是可行、有效的.%To improve the dynamic response speed and disturbance rejection ability of PMSM control system,by analyzing of the double closed-loop control system structure of velocity and current (or torque) for PMSM,a velocity loop control strategy based on the fuzzy PID control principle is proposed.The fuzzy PID controller firstly fuzz up the error and change rate of error of rotate speed for PMSM,then it carries out the fuzzy reasoning by the fuzzy rules,and the controller can adjust three coefficients of the PID (proportion coefficients,integration coefficients,differentiation coefficients) of the velocity loop automatically online,it not only reduces the adjust time of the velocity loop,but also can reject the disturbance of the current loop (or torque loop).The simulation results show that compared with the traditional PID control strategy,the fuzzy PID control strategy can improve the dynamic performance and robustness of the system.The proposed method is feasible and effective for the PMSM control.