实现过零触发PWM脉宽调功的硬件电路

:2005-09-29:(1977-),,,,,PWM1,2(1.,066004;2.,100011):PWM,,,,:PWM;;;MAX530;MAX038:TM921:A:100020682(2006)0420037204Ahardwarecircuitdesignedtorealizezero2cross2overtriggeringPWMpowerregulationLIUXue2jun1,LUANHai2ying2(11CollegeofInformationScience&EngineeringunderYanshanUniversity,HebeiQinhuangdao066004,China;21BeijingInstituteofAutomationforMachineIndustry,Beijing100011,China)Abstract:Thispaperpresentsahardwarecircuitdesignedtorealizezero2cross2overtriggeringPWMpowerregulation.Thecircuitrunssmoothlyandreliably.Itscontrolactionisaccurate.Thedesignedcir2cuithasbeenputintooperationforsixmonthsandhasachievedgoodcontrolresults.Keywords:PWM;zero2cross2overtrigger;solidstaterelay;MAX530;MAX038PWM(PulseWidthModulator),,[1],PWMPWMD/A11D/A()()PWMPWM(120ms),,[2],,,,,,[3]22PWM,,D/A,,()PWM[4]PWM(),,,,7320064,A/D,D/AMAXIMMAX530MAX530-12+5VD/A[5]MAX530,-2.048+2.048VROFSREFINMAX53033MAX530CLR,P1.0,P1.0,RETCLR,MAX530P2.7CS,P2.6P2.5A1A0,D/A#7FFFH(8)#1FFFH(4)8+4(1248),LDAC,,D/A,12,MAX0382.5V0.1Hz20MHz,15%85%44MAX03883200645D/A6A0A110(1,0),DADJ,50%MAX038f0IinFADJUFADJCOSCCfUFADJ=0V,f0=Iin/CF,Iin=Uin/Rin=2.5/Rin[6]Iin2750A,10400A,CF20pF100F,,,10min,PWM2s,,f0=0.5Hz=Iin/CF,Iin=50A(Rin=50k),CF=100FMAX038OUT50%0.5HzP-P2VD/A-2.048+2.048V,,P-P4.096VLM318,4,LM3392s(),D/A,,PWM,D/APWMD/A,PWM;D/A,PWMD/A+2.048V,PWM,100%;D/A-2.048V,PWM,0%D/A56,PWM,,,74LS14(6),6,,4N25,6AC-SSR(AlternatingCurrent-SolidStateRelays),,,,(AC-SSR)779320064PWM,,PWM(2s),PWM,PWM,,,PWM()6P=nNPmax(1)P,Pmax(4kW),n,Nn=0,;n=N,2s,50HzN=250=100,nPWM,01001%,Pmin=nNPmax=11004000=40W(2)PWM(2s)CPUPIDD/A,,,,,,03000.1%,0.3,,PWM:[1].PWM[J].(),1999,12(2):143-147.[2].[D].,2000.[3],.PWM[J].,1998,(6):26-30.[4],.PWM[J].(),2000,18(3):16-19.[5].MAx530[J].,1997,(8):31-34.[6],.MAx038[J].,2001,3(1,2):33-35.(47)2ControX2000,PC,,ControX2000,,,6:3CAN,,CAN,,,CAN,,CAN,,,:[1].CAN[J]1(),2005,27(4):63-66.[2],,.CAN[J]1,2005,(1):21-24.[3],,.CAN[J]1,2005,24(2):54-56.[4],,.[J]1,2004,25(4):503-506.0420064