引用本文:潘月斗,王国防.基于中立型系统理论的异步电机电流解耦控制方法[J].控制与决策,2020,35(2):329-338
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基于中立型系统理论的异步电机电流解耦控制方法
潘月斗,王国防
(北京科技大学自动化学院,北京100083)
摘要:
针对异步电机传统系统建模中忽略数字延时,造成建模不精确,加剧电流环中两电流间的交叉耦合,导致低开关频率的传动系统电流畸变、系统不稳定等严重问题,运用中立型理论,提出一种基于中立型的异步电机电流解耦控制方法,设计中立型电流控制器.该电流控制方法具有参数自动整定的优点,且耦合小、响应快、鲁棒性好,该理论通过建立精确的数学模型来解决数字延时问题对传动系统控制性能的影响.对异步电机中立型时滞系统进行稳定性分析,通过仿真和实验结果表明了所设计中立型电流控制器的可行性.
关键词:  异步电机  数字延时  解耦控制  线性矩阵不等式  中立型控制器
DOI:10.13195/j.kzyjc.2018.0757
分类号:TP273
基金项目:国家自然科学基金项目(51331002).
Decoupling current control scheme for induction motors based on neutral system theory
PAN Yue-dou,WANG Guo-fang
( School of Automation,University of Science and Technology Beijing,Beijing100083,China)
Abstract:
In the traditional system modeling of induction motors, the neglect of digital delay results in inaccurate modeling, which exacerbates the cross-coupling between the two currents in the current loop, leads to serious problems such as current distortion of the low-switching frequency drive system, system instability, etc. Using the neutral theory, a neutral-based current decoupling control method for induction motors is proposed, and a neutral current controller is designed. The current control method has the advantages of automatic parameter tuning, small coupling, fast response, and good robustness. The theory solves the influence of the digital delay problem on the control performance of the drive system by establishing an accurate mathematical model. The stability analysis of a neutral type time-delay system for induction motors is carried out. Simulation and experimental results show the feasibility of the designed neutral current controller.
Key words:  induction motor  digital delay  decoupling control  LMI  neutral controller

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