PWM直流脉宽调速系统的设计论文推荐.doc

PWM直流脉宽调速系统的设计 PAGE 28 摘 要 以电力电子学和电机调速技术为基础，本文设计了一种基于直流脉宽调速控制技术的直流电机调速系统。为了得到较好的动静态性能，该控制系统采用了双闭环控制，同时速度调节器和电流调节器都选用PI调节器。 本调速系统采用半桥型电路作为主电路,它相当于降压斩波电路和升压斩波电路的串联组合,选用全控型器件IGBT作开关器件。控制电路以集成PWM控制器SG3525为核心,3525输出的脉宽调制信号经LM1413放大后作为IGBT的驱动信号。实验证明本调试系统直流电压大小调节和电机可逆运行的实现非常方便，并具有较硬的静特性和机械特性。 关键词: 升/降压斩波电路；SG3525；直流脉宽调速  Abstract On the basis of Power Electronic and electric motor speed adjusting technology, the calibrator designs a speed adjusting system in which Pulse Width Modulation (PWM) controlling technology is used to control D.C. motor. Dual closed loop controlling technic is alse adopted so that the sysetem has satisfactory steady-state and dynamic characters. The system uses single chip micro computer as an auxiliary unit. Insulated Gate Bipolar Transistor (IGBT) is selected as power semiconductor on-off element in the system The thesis explains the principle of PWM controlling. The special integrated PWM controller-SG3525 which can help us realize PWM control easily is elaborated , this chips internal structure and its peripheral circuit are analyzed, and its applying example in this system is given. Key words: Boost/Buck chopper；SG3525；DC Pulse Width speed control 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc169456860 摘要 III HYPERLINK \l _Toc169456861 Abstract IV HYPERLINK \l _Toc169456863 第1章 引言 1 HYPERLINK \l _Toc169456864 1.1 直流拖动系统 1 HYPERLINK \l _Toc169456866 1．2调速系统的性能指标 1 HYPERLINK \l _Toc169456867 1.3课题来源 2 HYPERLINK \l _Toc169456868 1.4文献综述 3 1.5直流电机参数 5 HYPERLINK \l _Toc169456869 第2章 PWM直流调速系统总体介绍与主电路原理 6 HYPERLINK \l _Toc169456870 2.1 电路组成及系统分析 6 HYPERLINK \l _Toc169456871 2.2主电路工作原理 6 HYPERLINK \l _Toc169456872 2.3主电路的组成 8 HYPERLINK \l _Toc169456892 第3章 PWM控制电路 10 HYPERLINK \l _Toc169456873 3．1 PWM基本原理 10 HYPERLINK \l _Toc169456874 3．2 PWM的理论基础 11 HYPERLINK \l _Toc169456874 3．3 PWM实现方法 12 HYPERLINK \l _Toc169456874 3．4直流电机的PWM控制技术 13 HYPERLINK \l _Toc169456892 第4章 转速调节器和电流调节器的设计 18 HYPERLINK \l _Toc169456874 4.1 PID调节器的基本原理