PMSM无模型滑模转速无差拍电流预测控制  

PMSM Model-free Sliding Mode Speed Prediction Control Without Beat Current

作　　者：王巍[1] 王鹏程 侯利民[1] WANG Wei;WANG Peng-cheng;HOU Li-min(Liaoning Technical University,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学,电气与控制工程学院,辽宁葫芦岛125105

出　　处：《电力电子技术》2024年第1期18-22,48,共6页Power Electronics

基　　金：国家自然科学基金(52177047);辽宁省教育厅基金项目(LJ2019JL011)。

摘　　要：针对传统永磁电机调速系统易受到参数摄动影响而导致控制精度下降的问题,提出一种基于扩张状态观测器(ESO)的永磁同步电机(PMSM)无模型滑模转速无差拍电流预测控制策略。首先用参数摄动下的PMSM调速系统数学模型归纳出系统对应的超局部模型,然后结合无差拍预测控制思想设计了电流环控制器,采用两步预测算法解决了传统无差拍算法存在的延时问题,并且提出校正算法进一步抑制实际的预测误差;利用变速率指数滑模趋近率设计了新型无模型滑模速度控制器,减弱抖振的同时提高了系统响应速度;并设计ESO对参数失配和扰动进行估计和补偿。最后,通过仿真与半实物实验验证了所提控制策略的有效性。To solve the problem that the control accuracy of traditional permanent magnet motor speed control system is easy to be affected by parameter perturbation,a model-free sliding mode speed prediction control strategy of permanent magnet synchronous motor(PMSM)based on extended state observer(ESO)is proposed.Firstly,the hyperlocal model of the PMSM speed regulation system under parameter perturbation is summarized,and then the current loop controller is designed based on the idea of beat free predictive control.The two-step prediction algorithm is used to solve the delay problem of the traditional beat free algorithm,and the correction algorithm is proposed to further suppress the actual prediction error.A new model-free sliding mode speed controller is designed based on the sliding mode approach rate of variable rate index,which reduces buffeting and increases the response speed of the system.An ESO is designed to estimate and compensate the parameter mismatch and disturbance.Finally,the effectiveness of the proposed control strategy is verified by simulation and semi-physical experiments.

关 键 词：永磁同步电机 无模型滑模转速 扩张状态观测器 

分 类 号：TM351[电气工程—电机]