基于改进SMO与变参数LTD的PMSM无传感器控制
PMSM Sensorless Control Based on Improved SMO and Variable Parameter LTD
代成刚 1杨其华 1袁月峰 1李锐鹏1
作者信息
- 1. 中国计量大学机电工程学院,杭州 310018
- 折叠
摘要
为解决基于滑模观测器的PMSM无感控制系统抖振大、响应速度慢等问题,在转速环PI控制器前引入变参数线性跟踪微分器,实现由I/F起动向转速-电流双闭环控制模式的平稳过渡.采用sigmoid函数替换sign函数消除由sign函数在滑模面切换给等效反电动势带来的高次谐波;根据反电动势与电机转速关系以自适应滑模增益提高系统响应速度,并利用李雅普诺夫稳定性判据分析改进后算法稳定性.在仿真平台以及PMSM控制系统上进行控制算法验证,表明了所提出的改进PMSM无传感器控制策略对抑制系统抖振与提高系统的响应速度具有良好的效果.
Abstract
In order to solve the problems of large buffeting and slow response in the non-inductive PMSM control system based on the sliding mode observer,a variable parameter linear tracking differential is intro-duced in front of the speed loop PI controller to realize the smooth transition from I/F to the speed-current double closed-loop control mode.sigmoid function is used to replace sign function to eliminate the higher harmonics caused by the switch of sign function to the equivalent back electromotive force.According to the relation between back electromotive force and motor speed,the adaptive sliding mode gain is used to improve the system response speed,and the stability of the improved algorithm is analyzed by Lyapunov stability criterion.The control algorithm is verified on the simulation platform and PMSM control system,and it is shown that the proposed improved sensorless control strategy has good effect on suppressing chatte-ring and improving the response speed of the system.
关键词
滑模观测器/变参数线性跟踪微分器/I/F起动/sigmoid函数/自适应滑模增益Key words
synovial observer/variable parameter tracking differentiator/I/F starting/sigmoid function/a-daptive synovial gain引用本文复制引用
基金项目
国家自然科学基金项目(52005473)
浙江省自然科学基金项目(LQ20E050018)
出版年
2024
NETL
NSTL
万方数据