基于SPWM的异步电机变频调速系统设计与仿真研究(MATLAB,Simulink)
基于SPWM的异步电机变频调速系统设计与仿真研究(MATLAB,Simulink)(开题报告,论文说明书15000字)
摘要
异步电动机是一个非线性、强耦合多变量系统，如何对它进行控制一直是电气传动行业的焦点。随着新型电力电子器件、智能功率集成电路问世，现代控制理论的发展和计算机技术的应用，变频技术日新月异，变频调速是交流调速的发展方向，变频调速也有多种方法，本文对目前研究领域相当活跃的正弦脉宽调制技术（SPWM）的变频调速作了一定研究，并进行了仿真。本文在MATLAB/SIMULINK环境下建立了了一个恒转矩调速系统，对单极性、双极性SPWM这两种逆变方式进行了比较。研究了频率调制度对输出电压谐波性能的影响。又对变频调速启动的与直接启动进行比较。最后对本文设计的调速系统进行了总结与展望，提出了电压电流双闭环控制系统的研究方向。
关键词：异步电动机 SPWM调速MATLAB
The study and designation about induction motor’s variable frequency speed control system based on SPWM
Abstract
Asynchronous motor is a nonlinear,strong coupling multivariable system,how to control has been the focus of electrical transmission industry.With the new power electronics device,intelligent power integrated circuit of the market,the development of modern control theory and the application of computer technology,frequency control technology is developing rapidly.Frequency control is the development direction of ac speed adjustment,variable frequency speed regulation also have many kinds of methods,this paper discusses the present research domain is quite active sine pulse width modulation technology(SPWM) of the frequency control had some research,and simulation. In this paper, I established a constant torque speed regulation system under the environment of MATLAB/SIMULINK. Compared the double polarity with the single polarity SPWM inverter, and have a study on how the frequency modulation influenced the output voltage harmonics，compared frequency control of motor speed start with direct start.Finally, the speed control system design in this paper is summarized and prospect, and puts forward the research direction of the voltage and current double closed loop control system
Key Words：AC asynchronous motor SPWM speed regulation MATLAB
目录
摘要 I
Abstract II
第一章绪论 1
1.1课题背景 1
1.2交流变频调速的国内外现状 1
1.3各种控制理论和策略的基础研究 3
1.4 SPWM变频调速系统概述 4
1.5本文的结构安排 5
第二章脉宽调制的异步电动机变频调速系统 6
2.1异步电动机变频调速的基本原理 6
2.2变频调速控制方式分析 6
2.2.2 SPWM调制变频技术 8
2.2.3单极性SPWM法 9
2.2.4双极性SPWM法 10
2.2.5 倍频单极性SPWM 11
2.3 SPWM控制信号的产生方法 12
2.4 SPWM逆变技术 13
2.4.1逆变电路 13
2.4.2静止式SPWM间接变压变频装置 14 [版权所有：http://DOC163.com]
第三章变频器主电路及参数设置 16
3.1逆变器的主电路设计 16
3.2变频器主电路设计的基本工作原理 18
3.3逆变器的主电路参数计算 20
3.4系统参数分析及选择 21
第四章 SPWM变频调速系统仿真 23
4.1 MATLAB语言 23
4.2三相逆变器SPWM调制仿真 24
4.3异步电动机SPWM变频调速系统及其MATLAB仿真 27
4.3.1单极性恒压频比调速系统建模 27
4.3.2 仿真结果及分析 29
第五章总结与展望 36
5.1结论 36
5.2展望 36
参考文献 37