摘要
高性能永磁电机伺服系统需要快速的电流响应,数字控制系统中的延时环节会制约电流环动态性能。为此,该文推导了矢量控制系统中主要延时环节的数学模型并分析其不利影响;在此基础上,引入Smith预估算法,针对永磁电机电流环的高动态响应要求,提出一种Smith预估电流控制器,给出该电流控制器的设计过程及实现方法,并讨论了电机参数敏感性。仿真与实验结果表明,所提控制策略正确有效,而且能对控制系统的延时环节进行较好补偿,可有效改善电流环动态性能,进而有助于提高伺服系统整体性能。
High performance permanent magnet motor servo system needs fast current response.The delay link in digital control system will restrict the dynamic performance of current loop.For this reason,this paper deduces the mathematical model of the delay link in vector control system and analyses its adverse effects.Accordingly,Smith predictive method is introduced,and a Smith predictive current controller is proposed for the high dynamic response requirements of the current loop.The design process and implementation method of the current controller are given,and the sensitivity of motor parameters is discussed.The simulation and experimental results show that the proposed control strategy is correct and effective.It can compensate the delay link of the control system,improve the dynamic performance of the current loop effectively,and then improve the overall performance of the servo system.
作者
潘子昊
卜飞飞
轩富强
杨志达
Pan Zihao;Bu Feifei;Xuan Fuqiang;Yang Zhida(Center for More-Electric-Aircraft Power System Nanjing University of Aeronautics and Astronautics,Nanjing 210016 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第9期1921-1930,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51507079)
中央高校基本科研业务费(NS2018025)
中国博士后科学基金(2016T90454)资助项目。
关键词
永磁电机
电流控制器
SMITH预估控制
Permanent magnet motor
current controller
Smith predictive control