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外文翻译--基于68HC908MR16单片机的光伏正弦波逆变电源.doc

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外文翻译--基于68HC908MR16单片机的光伏正弦波逆变电源.doc

PHOTOVOLTAICPOWERPUPPLYPINEPAVEINVERTERBASEDON68HC908MR16MCUINTRODUCTIONWITHTHEGROWINGENERGYCRISISANDINCREASETHEENVIRONMENTALAWARENESSOFMANKIND,THEDEVELOPMENTANDUTILIZATIONOFNEWENERGYISRECEIVINGINCREASINGATTENTIONANDSOLARENERGYASANINEXHAUSTIBLESUPPLYOFHIGHLYEFFICIENTNONPOLLUTINGENERGYHASMOREPEOPLEOFALLAGESINTHISPAPER,THEPHOTOVOLTAICPOWERSYSTEMISSINUSOIDALINVERTERSUITABLEFORAHOUSEHOLD,ESPECIALLYFORELECTRICITYWITHOUTELECTRICITYINREMOTEAREASOFTHEWESTERNREGIONOFAPOWERSYSTEMUSERS,ASCHINASWESTERNDEVELOPMENTWILLBEITSMARKETPROSPECTSWILLBECOMEMOREANDMOREBROAD2STRUCTUREANDPRINCIPLEOFTHEINVERTERSYSTEM21THEBASICSTRUCTUREOFTHESYSTEMFIRSTOFALL,BYTHESOLARARRAYTOTHEBATTERYCHARGINGCIRCUITINORDERTOGETABASICSTABILITYOFTHEDCVOLTAGE,ANDTHENBYTHEINVERTERCIRCUITWILLBEHIGHFREQUENCYALTERNATINGCURRENTINTODIRECTCURRENTREVERSE,ANDFINALLYBYTHEFREQUENCYSTEPUPTRANSFORMERANDFILTERCIRCUITFILTERINGINTO50HZ,220VSINUSOIDALACVOLTAGECONTROLOFTHEWHOLESYSTEMISCOMPLETEDBYASINGLECHIPMR16THECOREPARTOFTHEFORMATIONOFSPWMWAVEANDTHEOUTPUTACVOLTAGEACCORDINGTOTHEFEEDBACKFORM,COMPOSEDOFSAMPLINGDIGITALPIREGULATORPART22SINGLECHIPONTHEMR1668HC908MR16SINGLECHIPISALOWCOST,HIGHPERFORMANCESINGLECHIP8ITHAS32KBYTESOFREWRITABLEFLASHMEMORYCHIPFLASH,WITH768BYTESOFRAM,THISSYSTEMCOMPLETELYENOUGH;WITHADEDICATEDMOTORCONTROLFOR6CHANNELPWMOUTPUTPWMMCMODULES,SUITABLEFORINSINGLEPHASE,THREEPHASEINVERTER,ATTHESAMETIMETHEMODULEWASALSODEVOTEDTOTHEPROTECTIONFAULTFAULTPIN4,WHENTHEFAULTDOESNOTOCCURINTHECASEOFINTERRUPTIONCAUSEDBYTHERAPIDBLOCKADEOFTHEPWMOUTPUTTOACHIEVETHEPURPOSEOFPROTECTION;WITHTHEOPTIONEXTERNALCRYSTALCLOCKORINTERNALCLOCKPHASELOCKEDLOOPCLOCKGENERATORMODULE,THESYSTEMCHOSENBYTHEINTERNALPLLCLOCKCANPRODUCEACCURATE8MHZINTERNALBUSFREQUENCY,SOASTOENSURETHEACCURACYOFTHEFREQUENCYOFTHESYSTEM;WITHPROGRAMMABLEADCLOCK,ADFASTESTCONVERSIONTIMEONLY2ΜS,TOMINIMIZEDISRUPTIONOFPROGRAMEXECUTIONTIME;WITHSCISERIALCOMMUNICATIONINTERFACE,CANWORKINFULLDUPLEXORHALFDUPLEXMODE,INTHISSYSTEMCANRELIABLYBECOMPLETEDWITHTHEOUTSIDEWORLDKEYBOARDMONITORSERIALCOMMUNICATIONSYSTEM23INVERTERMAINCIRCUITSWITCHINGDEVICEISAPPROPRIATEFORLOWPOWERDEVICES,WITHSWITCHINGSPEED,HIGHFREQUENCYCHARACTERISTICSOFTHEPOWERMOSFETSWITCHGATEDRIVESIGNALFROMTHESINGLECHIPMR16WAVEGENERATEDBYTHESPWMSIGNALDRIVERCIRCUITFULLBRIDGEINVERTERSPWMOUTPUTFORHIGHFREQUENCYWAVE,THESTEPUPTRANSFORMERANDFILTERIMMEDIATELYBE220V,50HZSTANDARDACVOLTAGESINUSOIDAL24SPWMWAVEFORMATION68HC908MR16WITHASPECIALSINGLECHIPMOTORCONTROLCANBEUSEDTOWORKINTHREEPAIRSOFCOMPLEMENTARYMODEORSTANDALONEMODE,INCLUDING6CHANNELPWMOUTPUTMODULEPWMMCINITIALIZATIONOFTHESYSTEMINITSWORKINTHREEPAIRSOFCOMPLEMENTARYPATTERNSINTHESAMEBRIDGETHATTHETWOPWMSIGNALARMISCOMPLEMENTARY,INTHEINITIALIZATIONOFDOLLARSTOWRITEAVALUETOTHEPMODHLINORDERTODETERMINETHECARRIERFREQUENCYTHATISSWITCHINGFREQUENCYREALTIMEWAVEPWMPULSEWIDTHCALCULATIONISCOMPLETEDBYTHEINTERRUPTIONOFTHEPROCEDURE,EACHPWMMCMODULEPCTNHLCOUNTERCOUNTSTOPMODHLOFTHEVALUEOFINTERRUPTIONCAUSEDPRE0360TOTHESINEVALUESSTOREDINFLASHINTOFORMINAGIVENREGION,EACHFAILURETOTAKEASINEVALUE,AFTERSOMECALCULATIONS,IHAVEAVALUE,BESENTTOPVALXHLREGISTER,SINGLECHIPWILLPVALXHLOFTHEVALUEOFPMODHLAFTERTHEVALUEINTHEAUTOMATICGENERATIONOFSPWMSIGNALSENTBYTHEPWMPININORDERTOPREVENTTHESAMEBRIDGEARMOFTHETWOTUBESATTHESAMETIMETHEPHENOMENONOFCONDUCTIONOCCURREDINTHEABSENCEOFSIGNALGENERATORDEADTIMEINDEADTMWRITESAREGISTERVALUETODETERMINETHEDEADTIMETHEDESIGNOFTHESYSTEMDEADTIMEFOR25ΜS,THECARRIERFREQUENCYTO10KHZ,INCLUDING200MADETOENLARGETHEVALUEOFTHESINESINETABLETHEREARE4MODULESPWMMCFAULTPROTECTIONPORTFAULT1FAULT4,WHENTHEPORTWHENHIGH,PWMMCINITIALIZATIONCANBESETTOBLOCKINACCORDANCEWITHTHECORRESPONDINGPWMOUTPUT,THESYSTEMISTHEUSEOFTHEOVERCURRENTPROTECTIONFUNCTION,WHENOVERCURRENT,ITFAULT1HOMEPORTINORDERTOPLACEALLSIXROADBLOCKADEPWMPORTPWMMCWORKTHESYSTEMSOTHATTHECENTERALIGNMENTMODE,INTHEPWMCLOCKFREQUENCYOF8MHZCARRIERUNDERITSFORMULAFORTHECYCLECARRIERCYCLE1/10KPMODHL1/8M2THEREFORE,THESYSTEMMUSTBEINITIALIZEDPMODHL0190NOTEFORTHEMR16INHEXADECIMALNOTATION25SYSTEMCONTROLSTRUCTURETHESYSTEMTHROUGHTHEDIGITALPIREGULATORTOCONTROLTHEREALIZATIONOFREGULATORSTHECONTROLSYSTEMBLOCKDIAGRAMSHOWNINFIGURE3ACVOLTAGEFEEDBACKSIGNALFROMTHEADSAMPLE,INORDERTOENSUREACCURACY,THESYSTEMUSESSAMPLINGVOLTAGETRANSFORMERJUSTSTARTTOSETOUTPUTVOLTAGEFROMTHESOFTSTART,SOFTSTARTISGENERATEDATSTARTUPINORDERTOAVOIDLARGEPEAKCURRENT,SOFTSTARTTHEUSEOFSUCCESSIVEINCREMENTALINCREASESTOAVOLTAGEREQUIREDFORTHEMETHOD,AFTERTHESOFTSTARTVOLTAGEISSETTOCORRESPONDTO220VVOLTAGEVALUESINORDERTOENHANCETHESPEED,THESYSTEMUSESAFEEDFORWARDCONTROLANDFEEDBACKCONTROLOFTHECONTROLMETHODOFCOMBININGINORDERTOENHANCETHEOUTPUTCHARACTERISTICSOFTHEDYNAMICSYSTEM,THESYSTEMCHANGESINACCORDANCEWITHTHERATIOOFDEVIATIONOFTHESIZEOFCOEFFICIENTANDINTEGRALCOEFFICIENTOFTHEFUZZYCONTROLMETHOD,WHENTHEDEVIATIONISLARGER,THEPROPORTIONCOEFFICIENTANDINTEGRALCOEFFICIENTISALSOLARGER,WHENTHEDEVIATIONOFTHEPROPORTIONOFSMALLCOEFFICIENTSANDINTEGRALCOEFFICIENTSMALLER,THUSREDUCINGTHEOVERSHOOT,ITISEASYTOMAKETHESYSTEMSTABLE,THETOTALELIMINATIONOFTHEINTEGRALSATURATIONPHENOMENON,BUTALSOTOENHANCETHEADAPTABILITYOFTHESYSTEM3SERIALCOMMUNICATIONINORDERTOENHANCETHESYSTEMSABILITYTOADAPTTODIFFERENTENVIRONMENTS,ITISNECESSARYTOMONITORANDCONTROLSYSTEMTOMONITORANDMODIFYTHEPARAMETERSOFREGULATION,THISSYSTEMUSESASERIALCOMMUNICATIONTECHNOLOGYKEYBOARDMONITORINGSYSTEMWITHTHEOUTSIDEWORLDTOCOMMUNICATEPROCEDURESONTHEUSEOFINQUIRYMETHODSTOTHEOUTSIDEWORLDPERIODICALLYSENDTESTDATA,TESTDATAINCLUDINGTHESOLARCELLVOLTAGE,CHARGECURRENT,BATTERYVOLTAGE,DCCURRENT,OUTPUTVOLTAGE,OUTPUTCURRENT,HEATSINKTEMPERATURE,WHENTHEEVENTOFTHEFAILUREPRIORITYSENDFAULTSIGNAL,WHENTHENEEDTOMODIFYPARAMETERSANDMODIFYDATAONTHERECEPTIONOFTHECORRESPONDINGPARAMETERS,ANDUSETHEMETHODSOFCALIBRATIONANDCALIBRATIONTESTOFTHEACCURACYOFDATACOMMUNICATIONSMAXIMSHARDWAREASAMAX485INTERFACECHIPTOWORKINHALFDUPLEXMODE,WHILETHESYSTEMOPTOCOUPLERISOLATIONSYSTEMSAPPROACHTOENHANCEANTIINTERFERENCEABILITYANDRELIABILITY4SYSTEMSOFTWAREDESIGNTHEMODULARDESIGNOFSYSTEMSOFTWARE,INCLUDINGTHEINITIALIZATIONMODULE,THEPROTECTIONMODULE,REGULATORMODULES,COMMUNICATIONMODULES,SUCHASINTERRUPTIONOFPROGRAMMODULES,INADDITIONTODISRUPTIONOFMODULESOUTSIDETHEMAINPROGRAMONTHEREMAININGMODULES,WHICHWILLCOMPLETIONOFSYSTEMINITIALIZATIONMAINMODULEINITIALIZATION,THEVARIABLEUNIT,GIVENTHEINITIALVALUEOFTHEREGISTERUNITPROTECTIONMODULEINACCORDANCEWITHVOLTAGEANDCURRENTSAMPLEVALUESTODETERMINEFAULTANDTHEFAULTOCCURSINTHEPWMOUTPUTOFTHEBLOCKADEPROTECTION,INCLUDINGUNDERVOLTAGEBATTERY,BATTERYOVERVOLTAGE,SYSTEMOVERLOAD,OVERHEATINGPROTECTION,INCLUDINGBATTERYVOLTAGE,OVERVOLTAGEPROTECTIONCANBEACHIEVEDSINCETHERESTORATION,THATIS,THEBATTERYVOLTAGEISDETECTEDANDRETURNEDTONORMAL,THESYSTEMRESOFTSTARTANDRESUMENORMALWORKOVERCURRENTPROTECTIONASARESULTOFTHERAPIDRESPONSETHEYNEEDTOPROTECTTHEUSEOFHARDWARE,WHENTHEOVERCURRENTATTHETIMEOFTHEBLOCKADEASSOONASALLTHEPWMOUTPUT,BUTALSOSEALEDOFFALLTHEDRIVINGCIRCUIT,ONLYTORETURNTOWORKCANBERESET,SOFTWARECANDETERMINEWHETHERTHEREHASBEENOVERCURRENTPROTECTIONREGULATORMODULETOCOMPLETETHESYSTEMOFTHEPIREGULATOROUTPUTVOLTAGEREGULATION,SOTHATTHEOUTPUTVOLTAGESTABILIZEDAT220V,WHILESOFTSTARTONTHEMALSOTHEENTRANCETOTHEOUTPUTPARAMETERSFORTHESOFTSTARTEXPORTSTOTHEDISRUPTIONMODULEMPARAMETERSINVOLVEDINTHECALCULATIONOFPWMPULSEWIDTHTHROUGHREALTIMEADJUSTMENTOFTHEVALUEOFTHEPARAMETERVALUECANBECHANGEDSOTHATTHEOUTPUTPULSEWIDTHGIVENTOFOLLOWINTERRUPTIONOFPROGRAMMODULESTOCOMPLETETHEISSUEOFSPWMWAVEFORM,ACVOLTAGE,ACCURRENTPARAMETERSOFTHESAMPLEINTERRUPTIONOFTHEENTRANCEPARAMETERSOFPIREGULATORFORTHEOUTPUTPARAMETERM,THEPARAMETERSINVOLVEDINTHECALCULATIONOFPULSEWIDTHTHATISPVALXHLVALUESCALCULATED,THUSCHANGINGTHEDUTYCYCLEWHICHREGULATESTHEOUTPUTVOLTAGE2INACCORDANCEWITHTHERULESOFSPWMSAMPLINGMETHODS,COMBINEDWITHTHEINITIALIZATIONOFPWMMCSETFORMULAFORCALCULATINGREALTIMEPULSEWIDTHFORISAHALFCYCLEPVALXHLPMODHL/2MSINPTRNEGATIVEHALFCYCLEPVALXHLPMODHL/2MSINPTRONEPTRPOINTERTOSINETABLE,SINPTRFORTHECORRESPONDINGSINEVALUEOFTHEPOINTERPTRPROTOTYPEMADEINACCORDANCEWITHTHEABOVETHINKING,THELASTTOBERELATIVELYSTANDARD220V,50HZSINUSOIDALVOLTAGE,SOFTSTARTISALSOVERYSTABLE,ITSFREQUENCYERROR≤01,THEOUTPUTVOLTAGEERROROF≤05ASARESULTOFTHECARRIERFREQUENCYOF10KHZ,INTHETRANSFORMERPRIMARYSIDETOBE20KHZHIGHFREQUENCYSIGNALSWITHOUTNOISEUNDERTHEABOVEMENTIONEDCONTROLCANENSURETHESYSTEMLOADORASUDDENREDUCTIONINLOADTOMAINTAINOUTPUTVOLTAGESTABILITYQUICKLYKEYBOARDANDMONITORSYSTEMWITHTHEOUTSIDEWORLDOFTHESERIALCOMMUNICATIONGOOD,STRONGPRACTICALITYANDRELIABILITY

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