基于H桥驱动直流电机调速系统电路的设计 毕业设计(论文).doc
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毕 业 设 计(论 文)
题目:基于H桥控制的直流电机调速系统电路的设计
(英文): Based on the H-bridge driver circuit of DC motor speed
control system design
院 别: 自动化学院
专 业:电气工程及其自动化(师范)
姓 名:
学 号:
指导教师:
日 期: 2013年5月
基于H桥控制的直流电机调速系统电路的设计
摘要
本文介绍了基于H桥驱动的直流电机调速系统,系统采用芯片LN298搭建H桥驱动电路,PWM调速信号由单片机AT89AC52提供,电机的驱动运转控制由单片机控制H桥,H桥再驱动直流电机。文章中采用了专门的芯片组成了PWM信号的发生系统,并且对PWM信号的原理、产生方法以及如何通过软件编程对PWM信号占空比进行调节,从而控制其输入信号波形等均作了详细的阐述。此外,本文中还采用了芯片LN298作为直流电机正转调速功率放大电路的驱动模块。另外,本系统中使用了测速发电机对直流电机的转速进行测量,经过滤波电路后,将测量值送到A/D转换器,并且最终作为反馈值输入到单片机进行PI运算,从而实现了对直流电机速度的控制。
关键词:PWM调速;H桥驱动;直流电机测速;数码管显示
Based on the H-bridge driver circuit of DC motor speed control system design
ABSTRACT
This article describes the DC motor speed control system based on the H-bridge driver, the system uses the chip LN298 build H-bridge driver circuit, PWM speed control signal is provided by the microcontroller AT89AC52 control H-bridge motor drive operation is controlled by a microcontroller, H-bridge DC motor drive. Articles using a specialized chip composed of a PWM signal generating system, and on the principle of the PWM signal generating method, and how to adjust the duty cycle of the PWM signal by software programming, thereby controlling the input signal waveform are made. elaboration. In addition, this paper also uses a chip LN298 as a forward speed of a DC motor power amplifier circuit driver module. In addition, the present system uses a tachogenerator to measure the rotational speed of the DC motor, after the filtering circuit, the measured value to the A / D converter, and, ultimately, as a feedback value PI operator input to the microcontroller, thus realizing the DC motor speed control.
Key words:PWM speed control; H bridge driver; DC Motor Speed; digital display
目 录
1绪论 1
1.1基于H桥控制的直流电机调速系统设计目的和意义 1
1.1.1选题的目的和意义: 1
1.1.2国内外研究现状简述: 1
1.1.3毕业设计(论文)所采用的研究方法和手段: 1
1.2利用H桥控制直流电机转速系统的设计项目发展 1
1.3利用H
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