摘要
针对异步电机传统的直接转矩控制系统转矩脉动大,因电机参数变化和负载波动等因素使调速性能变差的问题,提出了用滑模变结构速度调节器代替传统的PI调节器,并利用模糊控制方法改进逆变器矢量电压选择表,以达到更好调速的目的。在MATLAB/Simulink中建立了系统的仿真模型。仿真结果说明该系统能够提高转速的响应速度,减小转矩脉动,同时还具有较好的动静态稳定性和鲁棒性。
On the fact of the torque ripple is large in the traditional direct torque control system of the Asynchronous Motor and the problem of speed performance is made slow by the changing motor parameters and the load fluctuations,the article put forward a new idea.In same words,the idea is that the traditional PI controller is replaced by speed controller of Sliding Mode Variable Structure.What＇s more,on purpose of achieving better speed regulation,the Inverter voltage vector selection instrument is improved with the fuzzy control.On the other hand,the article accomplishes building the simulation model of the system through MATLAB/Simulink.The result make the system distinguished from others for some advantages.The system is able to increase the response speed and decrease the torque tipple.At the same time,the system is characterized by better static and dynamic stability and better robustness.
出处
《组合机床与自动化加工技术》
北大核心
2011年第6期69-72,76,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
广西研究生教育创新计划资助(2010105960811M31)
关键词
滑模变结构
模糊控制
稳定性
鲁棒性
sliding mode variable structure
fuzzy control
stability
robustness
