Analysis of frequency control system in single-phase asynchronous motor

摘要

single phase asynchronous motor is a kind of motor which is widely used in household and power industrial fields. It has the advantages of simple structure, low cost and convenient maintenance, which is suitable for various complex situations. With the development of science and technology and the improvement of people's living standards, although single-phase asynchronous motor speed regulation methods are various, but the traditional control methods are inefficient and limited in speed range, which can not meet the needs of production and life. At present, the technology of speed regulation is mainly concerned with three-phase asynchronous motors, and there are few researches on single-phase asynchronous motors. Therefore, referring to the methods of three phase motor can improve the speed governing performance of single phase asynchronous motor and achieve the goal of energy conservation. This is the hot spot of the research on SPM nowadays. This paper mainly focuses on the research of variable frequency speed regulation of SPM. According to the motor principle and coordinate transformation theory, the mathematical model of SPM with asymmetric winding in two-phase static coordinate system is bui then the topology structure and modulation technology of power supply inverter are studied, and the main circuit structure adopted in this project is determined; finally, the simulation model is built in MATLAB by using vector control technology.