欢迎来到天天文库
浏览记录
ID:236260
大小:418.51 KB
页数:13页
时间:2017-07-11
《基于单片机开环直流调速系统-外文翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、毕业设计(论文)外文翻译论文题目:直流电机的脉宽调速研究学生姓名:学号:专业:核工程与核技术方向:核电方向指导教师:2015年3月19日MICROCONTROLLERBASEDOPEN-LOOPSPEEDCONTROLSYSTEMFORDCMOTORAkhilendraYadav*GurleenKaur*AkankshaSharma*ABSTRACTThispaperpresentsopenloopspeedcontrolschemeforthespeedcontrolofapermanentmagnetDCmotorusi
2、nganAVRMicrocontroller.ThemicrocontrollerhasbeenprogrammedtoautomaticallyvarythedutycycleoftheH-bridgechopperdependingupontheset/requiredspeedofthemotor.ThechopperisdrivenbyahighfrequencyPWMsignal.ControllingthePWMdutycycleisequivalenttocontrollingthemotorterminalv
3、oltage,whichinturnadjustdirectlythemotorspeed.ThePCinterfacinghasbeendoneusingserialport(DB9Connector).Experimentalresultsshowthatproposedsystemissuitablefordifferentindustrialapplicationssuchastrolleybuses,subwaycars,orbattery-operatedvehicles.Keywords:Microcontro
4、ller,PWM,Speedcontrol.I.INTRODUCTIONVariablespeeddcdriveshavebecomewidespreadinhomeappliancearea.TheDCmotorisusuallyemployedinmanyapplicationsasitgivesvariablespeedandloadcharacteristicsduetoitseaseofcontrollability.Microcontrollersprovideasuitablemeansofcontroland
5、interfacefunctions.Thedcmotorwithchopperhashigherefficiencyastherearenocopperandironlosses.ThemainadvantageofPWMcircuitoveraresistivepowercontrolleristhatinaresistivecontrollersystemmostofthepoweriswastedinseriesresistorintheformofheat.Areasonablenumberofworkshaveb
6、eenfoundintheliteratureregardingthecontrolofdcdrives[1-4].UlaandSteadmanin[5]utilizedthemicrocomputertocontrolthespeedofthedcmotor.Thecontrolalgorithmsarestoredandimplementedbythemicroprocessorofthemicrocomputer.Thesystememploystheuseofathyristor,whichiscontrolledb
7、yusingthesoftwarestoredinthemicrocomputer.NicolaiandCastagnetin[6]usedamicrocontrollerforspeedcontrolofDCmotorbyaPWMsignalgeneratedfromamicrocontrollerunit(MCU).Themotorvoltagecontrolisachievedbymeasuringtherectifiedmainsvoltagewiththeanalogtodigitalconverterpresen
8、tontheMCUandadjustingthePWMsignaldutycycleaccordingly.HaasandMcPherson[7]describedmotorcontrollerusingPWMandtachometerfeedback.Thecontrollerusesa
此文档下载收益归作者所有