基于变速趋近律全阶滑模观测器的异步电机无速度传感器控制  

A sliding mode observer for asynchronous motors based on a variable rate reaching law

作　　者：吴春 邢展鹏 南余荣[1] 程江龙 Wu Chun;Xing Zhanpeng;Nan Yurong;Cheng Jianglong(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023;Yiwu Hengbang Building Intelligent Technology Co.Ltd,Yiwu 322000)

机构地区：[1]浙江工业大学信息工程学院,杭州310023 [2]义乌恒邦建筑智能科技有限公司,义乌322000

出　　处：《高技术通讯》2021年第9期969-977,共9页Chinese High Technology Letters

基　　金：国家自然科学基金(52007169);浙江省自然科学基金(LQ18E070005,LY20E070007)资助项目。

摘　　要：针对固定增益滑模观测器(FG-SMO)会导致异步电机(AM)无速度传感器控制系统的转速估计存在较大抖振和收敛速度慢等问题,提出一种变速趋近律的全阶滑模观测器(FOSMO),降低了系统的抖振,减少了转速收敛时间。所提观测器以电流误差为滑模面,设计了定子电流观测器和转子磁链观测器,并引入电流误差信息实现滑模增益的自适应调节。采用李雅普诺夫稳定性理论分析了所提观测器的稳定性,并推导得到转速估计自适应律。最后,在0.75 kW异步电机实验平台上对该算法进行验证。实验结果证明所提方法能够在中低速带额定负载稳定运行,具有良好的稳态性能以及快速的动态性能,且易于工程实现。For the fixed gain sliding mode observer(FG-SMO),the speed estimation of asynchronous motor(AM)has large chattering and slow convergence rate.Hence,a full-order sliding mode observer(FOSMO)with a variable rate reaching law is proposed,which can weaken the chattering and shorten speed convergence time.The proposed observer takes the current errors as the siding mode surface,and the current errors information is introduced into stator currents and rotor flux sliding mode observer to realize adaptive adjustment of the sliding mode gain.Lyapunov stability theory is used to analyze the stability of the proposed observer and derive the adaptive law of speed estimation.Finally,the algorithm is verified on a 0.75 kW AM experimental platform.The experimental results prove that the proposed method can run stably at low and medium speed with rated load.Moreover,the proposed method shows merits of good steady-state performance,fast convergence performance and convenient implementation.

关 键 词：异步电机(AM) 无速度传感器 滑模观测器(SMO) 变速趋近律 收敛时间 

分 类 号：TM343[电气工程—电机]