摘要三相异步电动机具备着其它类型电动机不存在的优点，比如构造简单、体积 小巧、高质量和效率、提高资源利用率等，因此现在被普遍应用于实际的机械制 造、工农业生产、航天航空、电气等其它领域。所以对于三相异步电动机的矢量 控制系统的探究具有重大的实际意义。84867

仿所以为了更好的分析三相异步电动机矢量控制系统的性质和基本原理，来 进一步探究和改善它的性能，本文重点讲述 SVPWM 技术、坐标变换原理、矢 量控制系统以及 MATLAB 仿真。三相异步电动机在三相静止坐标系、两相静止 坐标系以及两相旋转等坐标系统下从而建立各种关于矢量控制系统模型，接下来 要通过 MATLAB 仿真软件建立了矢量控制系统真模型，并对仿真后的实验结果 进行探究，来解析控制策略的正确性，此过程中验证了三相异步电动机的矢量控 制系统的调速性能的理论和实际意义。通过仿真结果能够看出，三相异步电机的 矢量控制系统的控制效果非常良好，效率也非常高。

但是研究中也存在一些需要去改进的问题：三相异步电动机在矢量控制系统 中仿真的精度不够高，需要改进和提高；转子电阻对转子磁链的精确性和定向的 准确性有影响，需要改进和提高；相对于对其他类型的控制方法来说三相异步电 动机的矢量控制复杂的结构使得它的数学运算变得非常繁琐和复杂，需要有所改 进和提高。

毕业论文关键词：三相异步电动机；SVPWM 技术；矢量控制系统；坐标变换原理；方程 表达式

Abstract Three phase asynchronous motor has the advantages of other types of motor does not exist, such as simple structure, small volume, high quality and efficiency, improve resource utilization。 At present it has been widely used in the actual machinery manufacturing, industry and trade of agricultural production, aerospace, electrical and other the field。 So the research on the vector control system of three-phase asynchronous motor has great practical significance。

So in order to better analysis of the three-phase asynchronous motor vector control and the basic principle of the nature of the system to further explore and improve its performance, this paper tells the story of SVPWM technology, the principle of coordinate transformation, vector control system and MATLAB simulation。 Three phase asynchronous motor under three-phase static coordinate system,  two-phase static coordinate system and two-phase rotating coordinate system to establish all about vector control system model, the next step is to through the MATLAB simulation software to establish the vector control system simulation model, and the simulation of the inspection result of inquiry, the correctness of the analysis of control strategy, the process to verify the three-phase asynchronous motor vector control system of the speed regulating performance of the theoretical and practical significance。 The simulation results can be seen that the control effect of the vector control system of three-phase asynchronous motor is very good, and the efficiency is very high。

But  there  are  some  problems  that  need  to  be  improved  in  the    study:the accuracy  of  the  simulation  of  three-phase  asynchronous  motor  in  vector   control system is not high enough, which needs to be improved and improved;rotor resistance has an influence on the accuracy and accuracy of rotor flux linkage, and it needs to be improved and improved;compared with other types of control methods, the complex structure of the vector control of three-phase asynchronous motor makes it very complicated and complicated, and it needs to be improved and improved。

Keywords: three phase asynchronous motor; SVPWM technology; vector control system; coordinate transformation principle; equation expression