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基于单片机的直流电机控制器的学位论文.doc
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基于单片机的直流电机控制器的学位论文.doc
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目录
摘要 ................................................................................I
ABSTRACT .........................................................................II
1 系统论述.........................................................................1
1.1 设计思路 ....................................................................1
1.2 基本原理 ....................................................................1
1.3 总体设计框图...............................................................1
2 直流电机单元电路设计与分析 ...............................................2
2.1 直流电机驱动模块 .........................................................2
2.2 直流电机的中断键盘控制模块 ...........................................7
2.3 1602LCD 液晶显示模块...................................................9
3 直流电机 PWM 控制系统的实现 ..............................................11
3.1 总电路图 ...................................................................11
3.2 总电路功能介绍 ..........................................................12
3.3 直流电机控制程序........................................................12
4 系统仿真 .......................................................................19
5 结束语 ..........................................................................22
参考文献资料....................................................................23
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摘要
本文是对直流电机 PWM 调速器设计的研究,主要实现对电机的控制。本课程设
计主要是实现 PWM 调速器的正转、反转、加速、减速、停止等操作。并实现电路的仿
真。为实现系统的微机控制,在设计中,采用了 AT89C51 单片机作为整个控制系统
的控制电路的核心部分,配以各种显示、驱动模块,实现对电动机转速参数的显示和
测量;由命令输入模块、光电隔离模块及 H 型驱动模块组成。采用带中断的独立式
键盘作为命令的输入,单片机在程序控制下,不断给光电隔离电路发送 PWM 波形,H
型驱动电路完成电机正反转控制.在设计中,采用 PWM 调速方式,通过改变 PWM 的占
空比从而改变电动机的电枢电压,进而实现对电动机的调速。设计的整个控制系统,
在硬件结构上采用了大量的集成电路模块,大大简化了硬件电路,提高了系统的稳定
性和可靠性,使整个系统的性能得到提高。
关键词:AT89C51 单片机;PWM 调速;正反转控制;仿真。
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Abstract
This article is a DC motor PWM speed control design study,
the main achievement of motor control. This course is
primarily designed to achieve PWM speed controller for forward
and reverse, acceleration, deceleration, and stop such an
operation. And to achieve the circuit simulation. To achieve
system, microcomputer control, in the design, using AT89C51
microcontroller control system as a whole, the core of the
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IV
control circuit, accompanied by a variety of shows, drive
module enables the motor speed parameter display and
measurement; from the command input module, Optical isolation
module and H-drive module. With the stand-alone keyboard with
a break as a command input, single-chip in the process control,
continuing to the optical isolation circuit to send PWM
waveform, H-type motor driving circuit to complete positive
inversion control. In the design, using PWM speed mode, by
changing the PWM duty cycle to change the motor armature
voltage, so as to realize the speed of the motor. Design of
the control system hardware structure with a large number of
integrated circuit modules, greatly simplifying the hardware
circuitry to improve stability and reliability of the system
so that the whole system performance is improved.
Key words: AT89C51 microcontroller; PWM speed; positive
inversion control; Simulation。
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