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*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