基于负载转矩建模的永磁同步电机模型预测控制  

Model Predictive Control of Permanent Magnet Synchronous Motor Based on Load Torque Modeling

作　　者：邓金 王斌[1] 周丹华 刘浩男 DENG Jin;WANG Bin;ZHOU Dan-hua;LIU Hao-nan(Jiangsu Academy of Safety Science and Technology)

机构地区：[1]江苏省安全生产科学研究院

出　　处：《化工自动化及仪表》2024年第4期582-586,共5页Control and Instruments in Chemical Industry

基　　金：江苏省重点研发计划(产业前瞻与关键核心技术)(批准号:BE2021085)资助的课题。

摘　　要：在永磁同步电机调速系统中,使用单闭环结构的模型预测控制器取代传统双闭环控制结构的速度外环PI调节器和电流内环PI调节器,以满足系统动态响应速度快、稳态误差小、控制精度高的要求。在电机预测模型建立时一般假设负载转矩扰动为零,导致电机在负载波动时,控制性能下降。针对这一问题,提出一种考虑负载转矩建模的模型预测控制方法,在不同的预测时域,将负载转矩分为可测量和不可测量两种情况,构造分段函数形式的状态预测模型。在Matlab仿真平台进行仿真验证,结果表明该算法能有效抑制外部负载波动,改善电机转速跟踪性能。In the speed regulation system of permanent magnet synchronous motor(PMSM),the model predictive controller with single closed loop structure was adopted to replace the speed outer loop’s PI regulator which boasting of traditional double closed loop control structure and the current inner loop’s PI regulator to meet the system which asking for fast dynamic response speed,small steady-state error and high control accuracy.When the motor prediction model was established,it’s generally assumed that the load torque disturbance is zero,which leads to degradation of the motor control performance when the load fluctuates.Considering that,a model predictive control method which having the load torque modeling considered was proposed,which has the load torque divided into measurable and unmeasurable cases in different prediction time domain,and has the state prediction model in the form of piecewise function constructed.The simulation on Matlab simulation platform shows that,this algorithm can suppress the external load fluctuation and improve the motor speed tracking performance.

关 键 词：永磁同步电机 电机控制 模型预测控制算法 负载转矩 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]