摘要
针对传统滑模观测器使用低通滤波器造成观测值相位和幅值发生变化的问题,提出一种扩展状态滑模观测器用于转子磁链观测。在αβ轴上以定子电流和转子磁链为状态变量建立四阶扩展状态方程,在此基础上构建四阶扩展状态滑模观测器。电流观测部分采用滑模面的符号函数构成滑模控制律作为输入,磁链观测部分以反馈矩阵与滑模控制律乘积作为输入,选择适当的反馈矩阵保证磁链观测的正确解耦,通过磁链方程对滑模控制中的抖振进行滤波处理,避免额外低通滤波器的使用。实验结果验证了提出观测器的有效性和可行性。
Since the phase and amplitude of the observed value are changed by the use of low-pass filter in the conventional sliding mode observer, an extended state sliding mode observer is proposed for rotor flux observation. A fourth-order extended state equation is established on theαβaxis with stator current and rotor flux as state variables, and on this basis, a fourth-order extended state sliding mode observer is constructed. The current observation part adopts the symbolic function of the sliding surface to form the sliding mode control law as input, and the flux observation part takes the product of the feedback matrix and the sliding mode control law as the input. Appropriate feedback matrix is selected to ensure the correct decoupling of flux observation,and the chattering in the sliding mode control is filtered by the flux linkage equation, then the use of an additional low-pass filter is avoided. The experimental results verify the validity and feasibility of the proposed observer.
作者
边疆
BIAN Jiang(Institute of Electrical and Electronic Engineering, Kaifeng University, Kaifeng 475000, China)
出处
《控制工程》
CSCD
北大核心
2019年第5期886-891,共6页
Control Engineering of China
基金
开封市科技发展计划项目(1908004)
开封大学科研基金(KDQN-2017-002)
关键词
永磁同步电机
扩展状态滑模观测器
转子磁链观测
反馈矩阵
Permanent magnet synchronous motor
extended state sliding mode observer
rotor flux observation
feedback matrix
