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1、GSM基站电调天线控制器摘要步进电机是将电脉冲信号转为角位移或线位移的开环控制元件。由步进电动机组成的开环系统既简单廉价，又可靠稳定。它有瞬间启动，急速停止，精度高等特点。冃前打印机，绘图仪，机器人，数控机床等等设备都以步进电机为核心动力。在各种办公自动化设备以及控制装置等领域屮有着极其广泛的应用。本文介绍的是基于单片机控制步进电机的控制系统设计，通过单片机、ULN2003驱动芯片以及相应的按键实现各种功能，并且步进电机的工作状态要用相应的数码管显示出来。本系统采用模块化设计，结构简单，可靠，清晰明了。通过人机交互换接口可实现各功能设置，操作简
2、单，易于掌握。介绍了步进电机以及单片机原理、该系统的硬件电路、程序组成，同时对软、硬件进行了调试，介绍了制作PCB板步骤。该设计具有思路明确、可靠性高、稳定性强等特点，通过调试实现以下几个主要功能：(1)控制步进电机实现正转和反转；(2)控制步进电机转速；(3)设计步进电机的脉冲放大电路，能驱动相电压为5V、相电流位为0.4A的步进电机工作；(4)实现对步进电机圈数的预置；(5)同步显示步进电机所转圈数。关键词步进电机PM25L-024-STB6；SST89E516RI)；C语言AbstractThesteppermotorisaopen-lo
3、opcontrolcomponentsthatcouldbetotransformtheelectricalpulsesignalintoangulardisplacementorlineardisplacement.Steppermotoropen-loopsystemisbothsimpleandcheap,reliableandstable.Ithasinstantstart,rapidstop,andhighaccuracy.Atpresent,printer,plotter,robot,CNCmachinetoolsandothere
4、quipmentwithsteppingmotorasthecoredrivingpower.Invariouskindsofofficeautomationequipmentandcontroldevices,andotherfieldshaveextremelyextensiveapplication.Thisarticledescribethesteppermotorcontroledsystemdesignwhichisbasedonthemicrocontroller,Throughthesingle-chipmicrocompute
5、r,ULN2003drivechipandcorrespondingkeyachievethosefunctions,andtheworkingstateofthesteppingmotorwithcorrespondingdigitaltubedisplay.ThesystemUSESthemodulardesign,simplestructure,reliable,andclarity.Throughtheman-machineinterfacecanrealizeAvarietyoffunctionsetting,simpleoperat
6、ion,easytomaster.Thispaperintroducesthecontentofthesteppingmotorandtheprincipleofsingle-chipmicrocomputer,thesystemhardwarecircuit,programcomposition,atthesametimeforthesoftwareandhardwaredebugging,introducesmakingPCBsteps.Thisdesignhasclearthinking,highreliability,andstrong
7、stabilityandothercharacteristics,throughthedebuggingrealizethefollowingmainfunctions:(1)Controllingthecorotationandinversionofthesteppermotor;(2)Controllingthespeedofsteppermotor;(3)designingthepulseamplifiercircuitofsteppermotortodrivethesteppermotorwith5Vvoltage,0.4Aphasec
8、urrent;(4)achievingthepresettingoflapsofthesteppermotor;(5)synchronouslydis
