考虑参数摄动的感应电机新型滑模观测器  

New Sliding Mode Observer Design for Induction Motor Considering Parameter Perturbation

作　　者：储建华[1] 于霜[1] 魏海峰[2] CHU Jianhua;YU Shuang;WEI Haifeng(Department of Mechanical and Electrical Engineering,Suzhou Institute of Industrial Technology,Suzhou 215104,Jiangsu,China;School of Electrical and Information,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China)

机构地区：[1]苏州工业职业技术学院机电工程系,江苏苏州215104 [2]江苏科技大学电子信息学院,江苏镇江212003

出　　处：《电气传动》2018年第3期3-8,共6页Electric Drive

基　　金：江苏省自然科学基金面上项目(BK20161229);江苏省高校自然科学研究面上项目(16KJB510046)

摘　　要：设计了2种滑模观测器,在α-β两相静止坐标系下,推导出含有相同耦合项的定子电流和转子磁链状态方程。考虑转子时间常数对滑模观测器的影响,将转子时间常数引入耦合项中,利用高频滑模函数代替耦合项,使得新型观测器不包含转子时间常数。通过Lyapunov稳定性判据获得滑模增益保证系统稳定,同时针对电机参数摄动分析了观测系统的鲁棒性。实验结果表明,提出的新型滑模观测器能够准确估计出电机转速以及转子时间常数,对电机内部参数摄动具有较强的鲁棒性,有效避免了滑模观测器对电机转子时间常数的依赖。Two sliding mode observers were designed.In the two-phase stationary coordinate system ofα-β,the stator current and rotor flux equation with the same coupling term were deduced.Considering the influence of the rotor time constant on sliding mode observer,the rotor time constant was introduced into the coupling term,and the highfrequency sliding mode function was used instead of the coupling term,then the new observer didnot contain the rotor time constant.The sliding mode gain was guaranteed by the Lyapunov criterion to ensure system stability.At the same time,the robustness of the observation system was analyzed for the motor parameters perturbation.The experimental results show the new sliding mode observer proposed can accurately estimate the motor speed and rotor time constant,and it has the strong robustness to the motor internal parameters perturbation,which effectively avoid the dependence of the sliding mode observer on the rotor time constant.

关 键 词：感应电机 滑模观测器 参数摄动 转子时间常数 

分 类 号：TM351[电气工程—电机]