毕业论文：《矢量控制变频器的设计》.docVIP

PAGE 摘 要 本文以交流三相异步电动机无速度传感器矢量控制理论的研究作为课题,综述了矢量控制和无速度传感器矢量控制技术的发展状况和研究的意义, 并且阐述了矢量控制原理，用MATLAB作为仿真工具，对电机模型和电压空间矢量法逆变模型作了仿真研究,且能与其它模型构成闭环系统，为研究无速度传感器矢量控制理论提供了基础。建立无速度传感器矢量控制系统并进行仿真研究，利用传统算法对无速度传感器矢量控制系统进行速度辨识，并讨论了仿真结果。 本文以电压空间矢量算法作为前提，介绍了一些目前比较常用的转速辨识方法，并以传统的转速辨识方法为例,给出了仿真结果，分析讨论了在不同的条件下的矢量控制系统的控制问题，并设计出了一种基于电压空间矢量法作为逆变器的转差频率控制的三相异步电动机闭环调速系统。 本文通过对无速度传感器矢量控制系统的仿真研究，避免了常规调速系统的测转速问题，并且通过矢量控制方法提高了系统的控制精度和调速范围，并为以后开发实际硬件的无速度传感器矢量控制系统提供了理论向导。 关键词：无速度传感器；矢量控制；速度辨识；电压空间矢量；MATLAB/ SIMULINK。 Abstract This article that formulates the significance of development status and research of the vector control and sensorless vector control and the theory of the vector control，using MATLAB as simulating tool to study the models of the induction motor and the space vector pulse width modulation on which the research of sensorless vector control is based，takes the Research of Sensorless Vector Control of Induction Motors as thesis name。Applying conditional arithmetic successively to sensorless vector control of induction motors system accomplishes the estimate of motor speed by setting up the system and discussion of simulating result。 The thesis has an based on the space vector pulse width modulation and specifies several kinds of arithmetic about estimate of speed， which analyses and discusses the control problems of vector control system under the commonly arithmetic, and works out the feasible simulating results. And then gives a system based on space vector pulse width modulation. The thesis which does a research on the simulation of sensorless vector control system，and solves sensor based estimate of motor speed，and improves the control precision and theory by the use of vector control system，provides theory guide for exploitation of hardware of sensorless vector control system。 Keywords: sensorless vector control system；AC motor；estimate of speed；space vector pulse width modulation；MATLAB/ SIMULINK 目 录 TOC \o 1-3 \h \z \u 1. 绪 论 h 1 1.1 课题研究的意义 h 1 1.2 课题