欢迎来到天天文库
浏览记录
ID:12631651
大小:418.51 KB
页数:13页
时间:2018-07-18
《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,更多相关内容在教育资源-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*ABSTRACTThispaperpresentsopenloopspeedcontrolschemeforthespeedcontrolofapermanentmagnetDCmotorusinganAVRMicroc
2、ontroller.ThemicrocontrollerhasbeenprogrammedtoautomaticallyvarythedutycycleoftheH-bridgechopperdependingupontheset/requiredspeedofthemotor.ThechopperisdrivenbyahighfrequencyPWMsignal.ControllingthePWMdutycycleisequivalenttocontrollingthemotorterminalvoltage,whichinturnadjustdi
3、rectlythemotorspeed.ThePCinterfacinghasbeendoneusingserialport(DB9Connector).Experimentalresultsshowthatproposedsystemissuitablefordifferentindustrialapplicationssuchastrolleybuses,subwaycars,orbattery-operatedvehicles.Keywords:Microcontroller,PWM,Speedcontrol.I.INTRODUCTIONVar
4、iablespeeddcdriveshavebecomewidespreadinhomeappliancearea.TheDCmotorisusuallyemployedinmanyapplicationsasitgivesvariablespeedandloadcharacteristicsduetoitseaseofcontrollability.Microcontrollersprovideasuitablemeansofcontrolandinterfacefunctions.Thedcmotorwithchopperhashighereff
5、iciencyastherearenocopperandironlosses.ThemainadvantageofPWMcircuitoveraresistivepowercontrolleristhatinaresistivecontrollersystemmostofthepoweriswastedinseriesresistorintheformofheat.Areasonablenumberofworkshavebeenfoundintheliteratureregardingthecontrolofdcdrives[1-4].UlaandS
6、teadmanin[5]utilizedthemicrocomputertocontrolthespeedofthedcmotor.Thecontrolalgorithmsarestoredandimplementedbythemicroprocessorofthemicrocomputer.Thesystememploystheuseofathyristor,whichiscontrolledbyusingthesoftwarestoredinthemicrocomputer.NicolaiandCastagnetin[6]usedamicroco
7、ntrollerforspeedcontrolofDCmotorbyaPWMsignalgeneratedfromamicrocontrollerunit(MCU).ThemotorvoltagecontrolisachievedbymeasuringtherectifiedmainsvoltagewiththeanalogtodigitalconverterpresentontheMCUandadjustingthePWMsignaldutycycleaccordingly.HaasandMcPherson[7]describedmotorcont
8、rollerusingPWMandtachometerfeedback.Thecontrollerusesa
此文档下载收益归作者所有