中 文 摘 要
本文介紹了基于單片機(jī)的直流電機(jī)PWM調(diào)速的基本方法，直流電機(jī)調(diào)速的相關(guān)知識(shí)以及PWM調(diào)速的基本原理和實(shí)現(xiàn)方法。重點(diǎn)介紹了基于MCS一51單片機(jī)的用軟件產(chǎn)生PWM信號(hào)以及信號(hào)占空比調(diào)節(jié)的方法。對(duì)于直流電機(jī)速度控制系統(tǒng)的實(shí)現(xiàn)提供了一種有效的途徑。
直流電動(dòng)機(jī)具有優(yōu)良的調(diào)速特性,調(diào)速平滑，方便，調(diào)速范圍廣，過(guò)載能力大，能承受頻繁的沖擊負(fù)載，可實(shí)現(xiàn)頻繁的無(wú)級(jí)快速起動(dòng)、制動(dòng)和反轉(zhuǎn)；能滿足生產(chǎn)過(guò)程中自動(dòng)化系統(tǒng)各種不同的特殊運(yùn)行要求。電動(dòng)機(jī)調(diào)速系統(tǒng)采用微機(jī)實(shí)現(xiàn)自動(dòng)控制，是電氣傳動(dòng)發(fā)展的主要方向之一。采用微機(jī)控制后，整個(gè)調(diào)速系統(tǒng)體積小、結(jié)構(gòu)簡(jiǎn)單、可靠性高、操作維護(hù)方便，電動(dòng)機(jī)穩(wěn)態(tài)運(yùn)轉(zhuǎn)時(shí)轉(zhuǎn)速精度可達(dá)到較高水平，靜動(dòng)態(tài)各項(xiàng)指標(biāo)均能較好地滿足工業(yè)生產(chǎn)中高性能電氣傳動(dòng)的要求。
The Design of DC Motor Speed Control System Based on The SCM
ABSTRACT
This paper introduces a kind of method of DC —motor speed modification based on PWM theory by the SCM.Showing some relative knowledge upon the DC—motor timing，the basic theory and the way to implement.And it emphasizes on the way for carrying out PW M signals based on MCS一51.This paper still provides a method for modifying the speed of DC—motor by way of taking count of data and time delay by software.It offers a sort of efficient method for the DC motor speed—controlling system.
DC Motor Speed Control has excellent characteristics, speed smooth and easy, and speed a wide range of Shock, able to withstand the impact of frequent load can be achieved without frequent fast-starting, braking and reverse; meet the production process automation systems various special operating requirements. Drives using micro-computer control, the development of electric drive is one of the major directions. Using computer control, the speed control system as a whole size, simple structure, high reliability, ease of maintenance and operation. Stable operation at the motor speed precision can be achieved at higher levels, static and dynamic indicators can better meet the industrial production of high-performance electric transmission requirements.
KEY WORD：SCM； PWM； DC —motor speed modification
目 錄
第一章 直流電機(jī)調(diào)速分析及研究意義 1
1.1 直流電機(jī)調(diào)速原理 1
1.2 PWM基本原理及其實(shí)現(xiàn)方法 2
1.2.1 PWM基本原理 2
1.3 實(shí)現(xiàn)方法 3
1.4 控制程序設(shè)計(jì) 3
1.5 研究背景 4
1.6 論文研究的目的與意義 4
1.6.1 目的 4
1.6.2 意義 4
第二章 系統(tǒng)硬件設(shè)計(jì) 6
2.1系統(tǒng)方案 6
2.2設(shè)計(jì)要求 6
2.3功能簡(jiǎn)介 6
2.4主要內(nèi)容 6
2.5電機(jī)調(diào)速控制模塊 7
2.5.1方案選擇 7
2.5.2 PWM調(diào)速工作方式 8
2.5.3 PWM調(diào)脈寬方式 8
2.5.4 PWM軟件實(shí)現(xiàn)方式 8
2.6系統(tǒng)分析與硬件設(shè)計(jì) 9
2.6.1單片機(jī)最小系統(tǒng)的設(shè)計(jì) 9
2.6.2電源電路設(shè)計(jì) 11
2.6.3直流電機(jī)驅(qū)動(dòng)電路設(shè)計(jì) 14
2.6.4顯示模塊設(shè)計(jì) 15
2.6.5鍵盤(pán)電路設(shè)計(jì) 16
2.6.6元件選擇與參數(shù)計(jì)算 17
2.7設(shè)計(jì)所需部分器件 20
2.8技術(shù)路線 20
2.9 應(yīng)用軟件的編制、調(diào)試 22
第三章 系統(tǒng)軟件的設(shè)計(jì) 23
3.1程序的總體設(shè)計(jì) 23
第四章 調(diào)試與仿真 24
4.1仿真圖形 24
第五章 結(jié)論和總結(jié) 26
參 考 文 獻(xiàn) 27
致 謝 28
附程序清單 28
