毕业设计论文_单片机控制双直流电机系统的设计与实现.doc

北京信息科技大学 毕业设计（论文） 题 目： 学 院： 自动化学院 专 业： 学生姓名： 班级/学号/2008010914 指导老师/督导老师： 起止时间：20年 2月2 日 至 20年 6 月 日 摘 要 关键字： Abstract Today, automation control system has been in all walks of life a wide range of applications and development, and dc drive control as the mainstream of electric transmission in modern production plays a main role in. Long-term since, for its speed adjustment for dc more flexible, simple, easy to big range smooth speed adjustment, the control performance is good wait for a characteristic, has been in the transmission fields hold a dominant position. It is widely used in the numerical control machine tool, industrial robot factory automation equipment. With the expansion of the modern production scale, each industry to dc motor of the transportation demand increases, and its performance put forward higher request. Therefore, the research and manufacturing of high performance, high reliability of the dc motor control system has very important practical significance. This paper discusses the single-chip microcomputer double dc motor control system design and realization method. The paper work mainly in the following aspects: 1. Based on single chip design of dc motor control system, using PWM control technology, using double drive control dc motor of the starting and stopping and speed control problem. 2. Design two dc motor of the hardware circuit, drive circuit including keyboard circuit. 3. Design write two dc motor control program, and based on the hardware debugging. Keyword: pwm signal，DC motor,microcontroller，Twinbridge drive, motor speed  目录 摘 要 I Abstract II 第一章 绪论 1 1.1 直流电机的发展 1 1.2 课题研究的目的及意义 1 1.3 本论文的主要工作 2 第二章 系统方案设计 3 2.1电机调速控制模块： 3 2.2 PWM调速工作方式： 3 2.3 PWM技术 3 2.4 PWM的参数 5 2.5直流电机的能量转换和特性曲线 5 第三章 硬件的设计 8 3.1 引言 8 3.2双桥驱动器L298N 8 3.3 L298N芯片介绍 9 第四章 硬件电路板的制作 13 4.1 引言 13 4.2确定工作层 13 4.3定义PCB形状及尺寸 13 4.4加载PCB元件封装库 13 4.5 元器件的布局 13 4