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20071125246TelecomPowerTechnologiesNov.25,2007,Vol.24No.6:2007-06-08:刘丹(1980-),男,江西吉安人,硕士研究生,研究方向电力电子技术与应用黄玉水(1969-),男,江西南昌人,博士,副教授,研究方向电力电子技术与应用:1009-3664(2007)06-0039-03TL494PWM1,1,1,2(1.,330031;2.92823,572021):介绍了一种由TL494为控制核心的脉宽调制技术,并将其应用于直流电动机控制系统分析了该系统的工作原理实现电路以及PWM控制芯片的结构和具体应用仿真结果表明该系统具有结构简单节能以及工作稳定可靠等优点:脉宽调制;TL494;电机控制:TM30:AThePWMControlSystemMadeofTL494LIUDan1,HANGYu-shui1,LULin-xiang1,ZHOUQ-iming2(1.InformationEngineeringCollege,NanchangUniversity,Nanchang330031,China;2.92823Unit,Hainan572021,China)Abstract:ThesystemofdirectcurrentmotorcontrolbasedonPWMisintroduced,whichiscomposedofTL494.Thecircuitanditsprincipleofthesystemareanalyzed.TheapplicationofaPWMcontrolchipisanalyzedtoo.Itcanseefromthesimulationresultthatthesystemhasmanymeritsassimpleconfiguration,energy-savingandhighreliability.Keywords:pulsewidthmodulation;TL494;motorcontrol0,(PulseWidthModulation,PWM)[1]TL494PWMPWM,,11.111Ud,(M),(VT),,t1,,t2T=t1+t2,k=t1/T,,[2]:U0U0=1TQ10u0dt=t1TUd=kUd(1)(U)U=(1TQkT0u02dt)12=kUd(2)(PWM),T,t122,PWM;#39#20071125246TelecomPowerTechnologiesNov.25,2007,Vol.24No.6,PWM,,PWM,,PWM,,PWM,BUCK,PowerMOSFET,,,1.2PWMPWM,TL494TL494[3]TL494(3)3TL494121;3;4,0~3.3V2%100%56RTCT,fosc;fosc=1.1RTCT(3),RTCT:RT=5~100k8,CT=0.001~0.1LF7;891110TL494;12;13,,14;145V,10mA;151621.34,,,TL49411,2,TL494PWM,(RES1),,PWM,,TL494215,16,TL494PWM,PowerMOSFET,4#40#20071125246:TL494PWMTelecomPowerTechnologiesNov.25,2007,Vol.24No.6,TL49413,,TL494Q1Q2,,98%2,PWMUCC=12V,:Un=12V,In=15A,4,Ra=0.218,J=0.57kgm2,RES1,0.50.650.8,555,,TL494PWM,3TL494PWM,PWM,PWM,TL494,:[1].[M].:,1995.[2]HacBodur,AFarukBakan.ANewZVT-ZCT-PWMDC-DCConverter[J].IEEETrans.onPE.2004,19(3):676-684.[3].TL494[J].,2001(2):66-67.(35)9SVPWM:[1],,.[J].,2005,27(3):284-288.[2].PWM[J].,2007,1:35-38.[3]JoaoOnofrePereiraPinto.AnalysisofExtendedCon-stantPowerSpeedRangeofthePermanentMagnetSyn-chronousMachineDriv2enbyDualModeInverterControl[D].TheUniversityofTennes2sess,Knoxville,2001.[4]ZhongL,RahmanMF,HuWY,LimKW.AnalysisofDirectTorqueControlinPermanentMagnetSynchronousMotorDrives[J].IEEETrans.onPowerElectron.,1997,12(3):528-535.[5].[J].,2003,36:87-88.[6],.[M].:,2005.#41#