基于单片机开环直流调速系统-外文翻译

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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