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摘??? 要

本文介绍了用PWM实现直流电机调整的基本方法。本文在给出直流电机调整和PWM实现方法的基础上,提供一种用单片机软件实现PWM调速的方法,以及直流电机调速的相关知识和PWM调整的基本原理和实现方法.介绍了基于MCS-51单片机用软件产生PWM信号的途径，在给出直流电机调整的实现方法的基础上，提供一种用单片机软件实现调速的方法。系统以8051单片机为核心,以小直流电机为控制对象,实现速度单闭环、PID控制．方便的人机对话接口,用键盘输入有关控制信号及参数,可以实现电机的启制动、正反转、速度调节．并在LED上实时显示输入参数及动态转速．详细给出调速系统的主电路原理图及各部分电路原理图，主要包括MCS-51电路，电源，键盘和显示电路，驱动电路，最后画出程序流程图.

关键词：MCS-51；PWM；硬件；直流电机

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ABSTRACT

The paper introduces a basic kind of method of DC-motor speed modification based on PWM theory. Showing some relative knowledge upon DC motor speed modification, the PWM theory and the way to implement. It emphasizes on the way for carrying out PWM signals based on MCS-51. Taking 8051 Single Chip Micyoco as core and the little direct current motor as control object, the single closed loop speed control and PID control were realized. In the convenient man-machine interaction interface,the control signal and parameter were inputted with keybaord.so that the start and brake of motor and speed regulation were also realized. Provided main electric circuit principle diagram and each parts of electric circuit principle diagram, mainly include electric circuits MCS-51s, power supplies, keyboard and manifestation electric circuit, drive electric circuit, draw a procedure flow chart finally.

Keyword: MCS-51 ；PWM ；Hardware ；DC Motor

目录 TOC \o "1-3" \h \z \u

HYPERLINK \l "_Toc231388417"摘??? 要 PAGEREF _Toc231388417 \h I

HYPERLINK \l "_Toc231388418"ABSTRACT PAGEREF _Toc231388418 \h II

HYPERLINK \l "_Toc231388419"1 绪论 PAGEREF _Toc231388419 \h 1

HYPERLINK \l "_Toc231388420"1.1课题研究的背景及意义 PAGEREF _Toc231388420 \h 1

HYPERLINK \l "_Toc231388421"1.2 PWM整流电源发展概况 PAGEREF _Toc231388421 \h 1

HYPERLINK \l "_Toc231388422"1.3本课题的来源，研究意义和研究目标 PAGEREF _Toc231388422 \h 2

HYPERLINK \l "_Toc231388423"2 PWM整流技术的现状 PAGEREF _Toc231388423 \h 3

HYPERLINK \l "_Toc231388424"2.1 PWM整流研究概述 PAGEREF _Toc231388424 \h 3

HYPERLINK \l "_Toc231388425"2.2 PWM整流的基本原理 PAGEREF _Toc231388425 \h 5

HYPERLINK \l "_Toc2