发布时间 : 星期二 文章PWM控制直流调速系统毕业设计更新完毕开始阅读aa416fda55270722182ef717
毕 业 设 计（论文）题 目 PWM控制直流调速系统的设计
毕业设计（论文）英文题目 The design of PWM DC speed regulating system
姓名 赵文琦
专 业 电气自动化 年 级 12级
指导教师 张晓红 职 称
提交日期 答辩日期
辽宁工程技术大学应用技术学院
年 月
摘要
随着社会的发展与进步，电动机在工农业生产、人们日常生活中起着十分重要的作用。电机分为多种，而直流电机是非常普遍的一种电机，他具有良好的调速性能，较大的启动转矩和过载能力，因此在各领域中都得到广泛应用。研究直流电机的控制和测量方法，对提高控制精度和响应速度、和提高产品的质量都具有重要意义。电机调速问题一直是自动化领域比较重要的环节之一。不同领域对于电机的调速性能有着不同的要求，因此，不同的调速方法有着不同的应用场合。
本设计是以电力电子学，电机与拖动学为基础，设计了一种基于脉冲宽度调制（简称PWM）控制技术的直流电机调速控制系统,对于调速系统中要用到的大功率半导体开关器件，鉴于各项指标的考虑，本文选用的是绝缘栅双极型晶体管（简称IGBT）。论文中对IGBT应用时要注意的事项进行了详细的讨论，对PWM控制的原理进行了详细的说明。论文给出了以SG3525芯片为核心的IGBT的驱动和保护电路，重点对集成PWM控制器SG3525做了详细的介绍，分析了SG3525的内部结构和外围电路的接法，并给出了它在系统中的应用电路。为了验证系统初步运行的可靠性，本论文进行了相应的仿真设计。
关键词: IGBT；PWM控制；调速；仿真
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Abstract
With the development and progress of the society, the motor in industrial and agricultural production, plays a very important role in People's Daily life. Motor is divided into multiple, and dc motor is one of the very common, he has a good speed regulating performance, bigger starting torque and overload capacity, thus is widely used in various fields. Study of dc motor control and measurement method, to improve the control accuracy and response speed, and improve the quality of the product is of great significance. Motor speed control automation is one of the more important link. Different areas for motor speed control performance has different requirements, therefore, different control methods have different applications.
This design is based on power electronics, motor and drag as the foundation, design a kind of based on pulse width modulation (PWM) control technology of the dc motor speed control system, the speed control system used in high power semiconductor switching devices, in view of the consideration of the indicators, this article chooses the insulated gate bipolar transistor (IGBT). Items to be paid attention to when using the IGBT in the paper discussed in detail, and has carried on the detailed instructions to the principle of PWM control. Paper gives the SG3525 chip as the core of IGBT drive and protective circuit, focusing on integrated PWM controller SG3525 is introduced in detail, analyzes the internal structure of SG3525 and peripheral circuit connection, and its application in the system circuit is presented. In order to verify the reliability of system preliminary operation, this paper has carried on the corresponding simulation design.
Key words: IGBT; PWM control; Speed control；The simulation
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目录
0 引言 ........................................................ 1 1 直流电动机及PWM调速系统 .................................. 3 1.1 直流电动机调速方式的选择 .................................. 3 1.1.1 直流电动机调速方法的选择 ................................ 3 1.1.2 直流电源的选择 .......................................... 4 1.1.3 晶闸管整流的缺点 ........................................ 5 1.2 PWM控制系统 .............................................. 6 1.2.1 选择PWM控制直流电动机调速的理由 ........................ 6 2 元器件的选择 ................................................ 7 2.1 门极可关断器件 ............................................ 7 2.1.1 几种常见的门极可关断器件 ................................ 7 2.2 IGBT的基本结构与工作原理 ................................. 9 2.2.1 基本结构 ................................................ 9 2.2.2 工作原理 ............................................... 10 2.3 IGBT的基本特性与主要参数 ................................ 10 2.3.1 IGBT的基本特性 ........................................ 11 2.3.2 IGBT的主要参数 ........................................ 12 2.3.3 IGBT的特性和参数特点 .................................. 12 2.4 注意事项与IGBT的保护 .................................... 12 2.4.1 注意事项 ............................................... 12 2.4.2 IGBT的保护 ............................................ 13 2.5 直流电动机及驱动芯片的选择 ............................... 13 2.5.1 直流电动机的选择 ....................................... 13 2.5.2 驱动模块的选择 ......................................... 13