摘要
针对传统滑模观测器存在的固有抖振问题,提出一种离散变增益永磁同步电机超螺旋滑模观测器。首先,该观测器增益随电机转速及系统内部状态动态调整,实现了宽范围变转速工况下的滑模抖振抑制。其次,设计一阶低通滤波器提高滑模控制系统暂态过程中的鲁棒性,基于反证法验证滑模轨迹在有限时间内的收敛性。最后,提出一种新型矢量控制策略对系统电流环d、q轴进行充分解耦,基于混合定向策略从观测器输出提取α、β轴有效反电动势分量,结合反电动势变换矩阵进行电流环内的前馈补偿。实验结果验证了该文所提出控制策略的有效性和实用性。
Since traditional sliding mode observer has inherent chattering problem,a discrete variable gain super-twisting sliding mode observer for permanent magnet synchronous motor is proposed.Firstly,the variable gain of the observer is dynamically adjusted with the motor speed and the internal state of system,so that the sliding mode chattering suppression in a wide range of variable speed conditions is achieved.Secondly,a first-order low-pass filter is designed to improve the robustness in the transient process of the sliding mode control system,and the convergence of sliding mode trajectory in finite time is proved based on reduction to absurdity.Finally,a new vector control strategy is proposed to fully decouple the d、q axis of current loop.Based on hybrid orientation,the effective back EMF component ofα、βaxis is extracted from the observer output,and combine with the back EMF transformation matrix,feedforward compensation in the current loop is realized.Experimental results verify the effectiveness and practicability of the control strategy proposed in this paper.
作者
张懿
吴嘉欣
韦汉培
张友泉
彭艳
Zhang Yi;Wu Jiaxin;Wei Hanpei;Zhang Youquan;Peng Yan(College of Electronics and Information Jiangsu University of Science and Technology Zhenjiang 212000 China;State Grid Shandong Electric Power Company Ji’nan 255001 China;College of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第21期4962-4970,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(61503161
91648119
51809128)
江苏省省重点研发计划产业前瞻与共性关键技术重点项目(BE2018007)
上海市科委能力建设项目(14500500400)资助
关键词
永磁同步电机
超螺旋滑模观测器
离散变增益
抖振抑制
矢量控制
Permanent magnet synchronous motor
super-twisting sliding mode observer
discrete variable gain,chattering suppression
vector control
