模糊控制在异步电动机变频调速系统中的应用研究.pdfVIP

Subject : The Application Research on the Asynchronous Motor Frequency Control Speed Regulation System Based on the Fuzzy Control Specialty : Power Electronics and Power Transmission Name : Gao Fang (Signature) Instructor: Wei Li (Signature) ABSTRACT With the development of power electronics technology and modern frequency control, and the proposal of the AC motor vector control theory, the inverter technology has been greatly developed. Moreover, in recent years, intelligent control got great development in terms of motor speed control, and fuzzy control theory, as a branch of intelligent control, was applied to the theory of induction motor vector control, which can further improve the static and dynamic performance. Based on the three-phase induction motor mathematical model and the basic principles of vector control, this thesis analyzes induction motor vector control system, improves the traditional ASR speed regulator PID control, adopts adaptive fuzzy PID control, and sets up the simulation model of the speed with torque inner loop and closed - loop vector control system, compares the traditional PID control with adaptive fuzzy PID control. The main content of this study can be divided into three parts. Firstly, the study gives an overview of the development of AC variable speed and inverter technology and intelligent control theory in the electric transmission system, analyzes the asynchronous motor vector control method. This paper employs the rotor flux observer in two-phase rotating c