【正文】 ..................................45 系統(tǒng)顯示流程圖 .....................................................................46 系統(tǒng)鍵盤流程圖 .....................................................................47 待機(jī)狀態(tài)下鍵盤操作流程 ...........................................47 連續(xù)運(yùn)行模式狀態(tài)下鍵盤操作流程 ............................49 第 6 章 總結(jié) ........................................................................................52 結(jié)論 ........................................................................................52 參考文獻(xiàn) ..............................................................................................54 致謝 ......................................................................................................56 附錄 1:部分系統(tǒng)程序清單 ..................................................................57 附錄 2:系統(tǒng)圖 ......................................................................................59 V CONTENTS ABSTRACT ........................................................................................... I ABSTRACT .......................................................................................... II Chapte r1 introduction ..........................................................................1 preface ...................................................................................... 1 Electronic circuit control method based on .................... 1 By means of control based on PLC\/ inverter ................. 2 Based on MCU control ................................................... 3 domestic and foreign development ........................................... 4 stepper motor drive mode classification and parison of..... 6 single voltage drive ........................................................ 6 high and low voltage drive ............................................. 7 selfexcited constant current chopper drive.................... 8 excitation type constant current chopper drive............... 8 subdivision drive ............................................................ 9 the purpose and significance of the study ...............................10 The paper ................................................................................. 11 Chapte r2 outlines the ste p motor ...................................................... 13 stepper motor features .............................................................13 stepper motor classification.....................................................14 reaction stepping motor .................................................14 permanent mag stepper motor ...................................14 The hybrid stepping motor.............................................14 The step operation of the principle of stepping motor on .......15 Chapter 3 ste ppe r motor control syste m ove rview ......................... 17 stepper motor control syste m...................................................17 The characteristics and function of the system........................20 Characteristics of the system .........................................20 system functions ............................................................21 Chapte r 4 hardware syste m design.................................................... 22 system ......................................................................................22 systemAT89C51MCU core ......................................................22 The main characteristics of............................................23 The pin...........................................................................23 Oscillator characteristics ...............................................25 chip erase .......................................................................25 minimum system ............................................................26 The peripheral circuit design ...................................................27 display circuit LCD1602 .............................................27 VI keyboard circuit .............................................................34 w atchdog reset circuit....................................................36 The drive circuit of L298N...........................................38 pow er supply circuit ......................................................41 Chapte r5 syste m software design ...................................................... 43 system software flow chart of ...................................................43 system initialization process in Figure ....................................44 The step motor running module flowchart ...............................45 system shows the process in Figure .........................................46 standby keyboard operation process ..............................47 continuous operation mode the keyboard operation process 49 Chapte r6 summa rizes ......................................................................... 52 conclusions ..............................................................................52 Refere nce ............................................................................................. 54 Thanks ................................................................................................. 56 Appe ndix 1:syste m program in listing .............................................. 57 Appe ndix 2:syste m diagram ...............................................................59 1 第 1 章 緒論 前言 步進(jìn)電機(jī)在工業(yè)自動(dòng)化裝備、辦公自動(dòng)化設(shè)備中有著廣泛的應(yīng)用。近年來(lái)，控制技術(shù)、計(jì)算機(jī)技術(shù)及微電子技術(shù)的迅速發(fā)展，有力地推動(dòng)了步進(jìn)電機(jī)控制技術(shù)的進(jìn)步，提高了步進(jìn)電機(jī)運(yùn)動(dòng)控制裝置的應(yīng)用水平。 步進(jìn)電機(jī)的控制系統(tǒng)多種多樣，但究其控制手段而言，主要可以分為以下幾種 : 基于電子電路 控制手段 在一些控制應(yīng)用不高的場(chǎng)合，采用簡(jiǎn)單數(shù)字定時(shí)集成芯片為步進(jìn)電機(jī)提供脈沖控制信號(hào)， 步進(jìn)電機(jī)受電脈沖信號(hào)控制，電脈沖信號(hào)的產(chǎn)生、分配、放大全靠電子元器件的動(dòng)作來(lái)實(shí)現(xiàn)。由于脈沖控制信號(hào)的驅(qū)動(dòng)能力一般都很弱，因此必須有功率放大驅(qū)動(dòng)電路。步進(jìn)電機(jī)與控制電路、功率放大驅(qū)動(dòng)電路組成一體，構(gòu)成步進(jìn)電機(jī)驅(qū)動(dòng)系統(tǒng)。此種控制電路設(shè)計(jì)簡(jiǎn)單，功能強(qiáng)大，可實(shí)現(xiàn)一般步進(jìn)電機(jī)的細(xì)分任務(wù)。這個(gè)系統(tǒng)由三部分組成 :脈沖信號(hào)產(chǎn)