基于模糊PI控制的永磁同步电动机调速系统研究与设计

发布时间：2018-05-06 02:18

本文选题：永磁同步电动机(PMSM) + 转速外环　；参考：《山东科技大学》2017年硕士论文

【摘要】：随着社会的发展,交流电动机几乎涵盖了我们生活工作的各个方面。相较于常见的交流异步电动机,永磁同步电动机具有体积小、运行可靠、低损耗、结构简单等优点,永磁同步电动机应用越来越广泛。随着永磁材料的研究发展,永磁同步电动机的性能不断提高,对永磁同步电动机调速系统的性能有了更高的要求。在系统调速过程中,如何在满足系统的动态、静态性能的基础上获得更好的鲁棒性能成为大家研究的热点之一。本文在传统的永磁同步电动机调速控制系统的基础上,针对转速外环采用的PI控制器在调速过程中由于PI参数单一、不能在线调节等缺陷,导致永磁同步电动机在启动时超调量过高,以及外界发生干扰时系统响应速度慢、抗干扰能力差等问题,对转速环控制策略进行深入的分析研究。经过查阅大量文献资料可知,模糊控制算法产生模糊子集,可以在已选定参数基础上,对参数的大小进行模糊变化,实现参数单一到参数多变。因此本文转速外环采用了模糊控制与PI控制相结合策略,建立了相应的模糊控制规则,设计了非对称模糊PI控制器,解决了调速过程中PI参数单一问题,实现调速过程在线调节参数目的。在外界发生干扰时,由于实时在线调节PI参数,使系统快速响应迅速恢复稳定运行,提高了系统的动态、静态性能和鲁棒性能。本文根据上述理论分析,搭建了永磁同步电动机调速系统仿真模型,并在此基础上进行了实验验证,实验结果表明非对称模糊PI控制比PI控制具有更好的稳定性。
[Abstract]:With the development of society, AC motor almost covers all aspects of our life and work. Compared with common AC asynchronous motor, permanent magnet synchronous motor has the advantages of small volume, reliable operation, low loss and simple structure, and the application of permanent magnet synchronous motor is more and more widely. With the development of permanent magnet materials, permanent magnet synchronous motor The performance of the motor is increasing and the performance of the permanent magnet synchronous motor speed control system is higher. In the process of system speed regulation, how to get better robust performance on the basis of satisfying the dynamic and static performance of the system has become one of the hot spots. This paper is in the traditional permanent magnet synchronous motor speed control system. On the basis of the PI controller used in the speed outer ring, the defects such as the single PI parameter and no on-line adjustment during the speed regulating process, which lead to the high overshoot at the start of the permanent magnet synchronous motor, and the slow response speed of the system and the poor anti-interference ability when the external disturbance occurs, and analyze the speed loop control strategy in depth. After consulting a lot of documents, it is known that the fuzzy control algorithm produces fuzzy subset. It can make fuzzy changes to the size of parameters on the basis of the selected parameters, and realize the single parameter to variable parameters. Therefore, this paper adopts the combination strategy of fuzzy control and PI control, and establishes the corresponding fuzzy control rules and designs the fuzzy control rules. Asymmetric fuzzy PI controller solves the single problem of PI parameters in the process of speed regulation, and realizes the on-line adjustment of parameters in the process of speed regulation. In the event of interference, the system can quickly respond to the PI parameters quickly and quickly, and improve the dynamic, static and robust performance of the system. This paper is based on the theory mentioned above. The simulation model of the permanent magnet synchronous motor speed control system is built, and the experimental verification is carried out on this basis. The experimental results show that the asymmetric fuzzy PI control has better stability than the PI control.

【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341;TP273

【参考文献】