考虑零速/极低速稳定性的异步电机转差频率与定子电阻耦合补偿策略  

A Coupling Compensation Strategy for Slip Frequency and Stator Resistance of Induction Motor Considering the Stability near Zero Speed

作　　者：钟志宏[1] 方晓春[1] 王晓帆 杨中平[1] 林飞[1] Zhong Zhihong;Fang Xiaochun;Wang Xiaofan;Yang Zhongping;Lin Fei(College of Electrical Engineering Beijing Jiaotong University,Beijing,100044,China)

机构地区：[1]北京交通大学电气工程学院

出　　处：《电工技术学报》2020年第S01期192-195,196-202,共11页Transactions of China Electrotechnical Society

摘　　要：在间接矢量控制中,为了实现高精度的控制,转差频率和定子电阻的补偿都非常重要。在现有的研究中,转差频率和定子电阻在零速/极低速下同时补偿的稳定性探讨较少,二者耦合关系的研究也不够深入。该文通过深入地分析转差频率和定子电阻在磁链上的耦合关系,给出转差频率和定子电阻解耦的条件,以及不解耦情况下能够收敛的条件。此外,利用李雅普诺夫稳定性第二定理,设计一种转差频率和定子电阻的耦合补偿策略,该策略在理论上可以达到全域渐近稳定,且在动态性能上具有一定的优越性。该文基于5.5kW电机对拖平台,对所提出的补偿方法进行了实验验证,证明了该方法与理论分析的一致性。In indirect vector control,the compensation of slip frequency and stator resistance is very important for high precision control.In the existing researches,the stability of compensation of slip frequency and stator resistance at low speed area is rarely discussed,and the research of coupling relationship between them is not deep enough.In this paper,the coupling relationship between the slip frequency and the stator resistance on the flux linkage is analyzed in depth,and the decoupling conditions of the slip frequency and the stator resistance and the convergence conditions are given.In addition,a new coupling compensation strategy of slip frequency and stator resistance is designed by using the second stability theorem of lyapunov.Based on the 5.5kW motor towing platform,this paper carried out experimental verification on the compensation method proposed in this paper,and proved the consistency of this method and theoretical analysis.

关 键 词：低速区 转差频率补偿 定子电阻补偿 李雅普诺夫 稳定性 耦合性 

分 类 号：TM315[电气工程—电机]