变频器设计使用外文文献翻译文档格式.docx

变频器设计使用外文文献翻译文档格式.docx

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（1）ConverterSelection:

Selectiontodeterminethefrequencyconverterwhenthefollowingpoints:

1）Thepurposeofavariablefrequency;

constantpressuretocontrolorconstantcurrentcontrol.

2）theloadconvertertypessuchasleavesorpumpvolumepumps,withspecialattentiontoloadtheperformancecurve,theperformancecurveofthedecisionofthewaysandmeans.

3）thefrequencyconverterandloadmatching

Voltagematch:

aratedvoltageconverterwitharatedvoltagelinewiththeload.

Currentmatches:

ordinarypump,theratedcurrentinverterandmotorratedcurrentmatch.Forspecialloadsuchasdeep-waterpumps,andsoonneedtorefertotheelectricalperformanceparameterstodeterminethemostcurrentinvertercurrentandGuozainengli.

Torquematch:

inthiscaseconstanttorqueloadorslowdownwhenthedevicemayhaveoccurred.

4）theuseofhigh-speedmotordriveinverter,becauseofthehigh-speedmotor,anti-small,highharmonicsleadtoincreasedoutputcurrentvalueincreases.Soforhigh-speedmotorinverterSelection,itscapacitytobeslightlylargerthantheordinarymotorselection.

5）Ifthefrequencyconvertertoalongcablerun,thistimetotakemeasurestocurbthelongcabletotheimpactofcapacitivecoupling,inadequateeffortstoavoidconverter,sointhiscase,thedrivetoenlargethecapacityofafileortheconverterOutputinstalledoutputreactor.

6）Fortheapplicationofsomespecialoccasions,suchashightemperatures,highaltitude,atthistimewouldcausethedownconvertercapacity,thedrivetoenlargethecapacityofablock.

（2）invertercontrolschematicdesign:

1）FirstconfirmationoftheinstallationenvironmentConverter

Operatingtemperature:

high-powerconverteristheinternalelectroniccomponents,vulnerabletotheeffectsoftemperature,productgeneralrequirementsfor0~55℃,butinordertoensurethesafe,reliable,theuseofroomtobetakenintoaccount,thebestcontrolin40℃below.Inthecontrolbox,theconverterboxshouldgenerallybeinstalledintheupperandstrictlycomplywiththeManualofinstallationrequirements,absolutelynotbeallowedtoheatingelementsorcomponentseasilyfeverclosetotheconverterinstalledatthebottom.

Ambienttemperature:

thetemperatureistoohighandlargetemperaturechanges,withineasyconverterthereisdew,theinsulationpropertieswillbegreatlyreduced,orevenshort-circuitcausedtheaccident.Whennecessary,tobeaddedtothedesiccantintheboxandheater.Inwatertreatment,generallyheavierthanwatervapor,ifthetemperaturechanges,thenthisproblemwouldbemoreprominent.

Corrosivegases:

theuseoftheenvironmentifthecorrosivegasconcentrations,willnotonlyleadcorrosionofcomponents,printedcircuitboards,butitwillalsoacceleratetheagingofplasticdevices,reducinginsulationproperties.

Vibrationandshock:

thecontrolcabinetwithconverterbyvibrationandmechanicalshockswillcauseelectricalconnectionisbad.Huaianthermoelectrictheresuchaproblem.Apartfromraisingthecontrolcabinetatthistimeofthemechanicalstrength,vibrationandshockawayfromthesource,wemustalsouseseismicrubberpadfixedwithinandoutsidethecontrolcabinet,suchaselectromagneticswitcheshaveavibrationcomponents.Equipmentoperationafteraperiodoftimeandshouldconductinspectionsandmaintenance.

Electromagneticinterference:

Inverteratworkduetorectificationandfrequency,producearoundalotofelectromagneticinterference,thesehigh-frequencyelectromagneticwavesinthevicinityoftheinstrument,apparatus,acertaininterference.Therefore,thecabinetinstrumentationandelectronicsystems,itshouldbeoptionalmetal,shieldingtheinverterinstrumentinterference.Allthecomponentsshouldbereliablegrounding,inaddition,theelectricalcomponents,equipmentandinstrumentationshouldusetheconnectivitybetweentheshieldingcontrolcables,andtheshieldshouldbegrounded.Ifhandledproperlyelectromagneticinterference,oftencausetheentiresystemdoesnotwork,leadingtothecontrolunitfailureordamage.

2）Drivesanddeterminethedistancebetweentheelectricalcablesandwiringmethods

Drivesandmotortheshortdistanceshouldbeasmuchaspossible.Thisreducesthecapacitanceofthecable,reducingtheemissionsourceofinterference.

Controlcablesoptionalshieldedcable,powercableoroptionalshieldingfromthecableconvertertouseallthethreadsoftheelectricalshield.

Electriccablesshouldbeindependentoftheothercablealignment,theminimumdistanceof500mm.Atthesametimeshouldavoidtheelectricalcablesandotherlong-runningcablelines,inordertoreducetheoutputvoltageinverterrapidchangesintheelectromagneticinterference.Ifthecontrolcablesandpowercablescross,asfaraspossiblesothattheycrossthe90-degreeangle.Converterandanalogsignalsonthelineandbacktothemainlineofseparationofalignment,eveninthecasealsointhecontrolcabinet.

Andtheanalogsignalconverterlinethebestchoiceofunshieldedtwistedpair,shieldedpowercablesselectionofthethree-corecable（itsspecificationsthanordinaryelectricalcablesinthefiles）ortocomplywiththeusermanualconverter.

3）invertercontrolschematics

Maincircuit:

theroleofreactoristopreventthehigh-frequencyconverterharmonicpowerthroughtheinputcircuittoreturntothegridbytheimpactofotherelectronicdevices,inaccordancewiththecapacitysizeconvertertodecidewhethertoincreasereactor;

filterConverterisinstalledintheoutput,theoutputofhigh-frequencyconvertertoreduceharmonics,whentheelectricalinvertertothelongerdistance,weshouldinstallfilters.Althoughthefrequencyconverteritselfhasallkindsofprotection,butthelackofprotectionisnotperfect,themaincircuitbreakerplayedoverload,lackthesameprotection,selection,inaccordancewiththecapacitytochoosethefrequencyconverter.Converteritselfcanbeusedtoreplacethermaloverloadprotectionrelay.

Controlloop:

thefrequencywiththefrequencymanuallyswitchtothefailurefrequencycanbemanuallycut-operation,notbecauseofoutputvoltage,frequencyandfrequency-beinterlocked.

4）Invertergrounding

Invertercorrectgroundingistoimprovethesystemstability,theabilitytoinhibitanimportantmeansofnoise.Invertergroundingresistancegroundingterminalofthesmallerthebetter,thegroundingwirecross-sectionofnotlessthan4mm,thelengthofnotmorethan5m.Invertershouldbegroundedandpowerequipmenttothesitesseparately,notintotal.Theshieldsignalconverterfromoneendofthegroundingend,theotherfloatingair.Inverterandcontrolofelectricalbetweenthesamecounter.

（3）InverterControlDesign

Convertershouldbeinstalledinthecontrolcabinetinternalcontrolcountersinthedesignshouldpayattentiontothefollowingissues

1）heat:

Inverterfeveristheinternalloss.Inthefrequencyconverterinthemainpartofthelossmainlytothemaincircuit,orabout98percent,accountingfor2%ofcontrolcircuits.Inordertoensurereliableoperationofthenormalinverter,Thermalmustinverterareusuallyusedforcoolingfan;

converterfanofthecontentsoftheconverterboxcanberemovedinternalheat,ifthefandoesnotwork,shouldimmediatelystopinverterOperation;

thehigh-powerinverteralsoneedtoincreasecontrolGuishangfan,Controlofthewind,todesignareasonable,alloutletintothenettosetupdust,exhaustopen,toavoidoverthecounterinaswirl,inafixedlocationdustAccumulation,accordingtothestatementconverterventilationfanstoselectthematch,fansinstalledtotheattentionofearthquakeproblems.

2）theproblemofelectromagneticinterference

Converterinitsworkduetorectificationandfrequency,producearoundalotofelectromagneticinterference,thesehigh-frequencyelectromagneticwavesinthevicinityoftheinstrument,apparatus,acertaininterference,andwillproducehighharmonics,thehighharmonicswillbeavailableforadoptionXinhualoopintothewholepowersupplynetwork,thusaffectingotherinstruments.Ifthepowerinvertersystemasawholelotofmorethan25percent,tobeconsideredtheanti-jammingmeasurestocontrolsupply.

Whenthesysteminthehigh-frequencyweldingmachinesuchastheimpactload,electroplatingpower,theconverteritselfwillappearasinterferenceprotection,toconsiderthewholesystemofpowerqualityproblems.

3）protectionissuesneedtopayattentiontothefollowingpoints

Waterproofanti-condensation:

Iftheconverteronthescene,theneedtopayattentiontothefrequencyconverterGuishangnothavetheflangeorotherpipelineleak,theinvertercannotbenearthewatersplash,sumupthesceneOEMSwitchgearKits&

levelofsecuritytoIP43above.

BOOT:

Alloutletintothenettosetupdustdebrisintothebarrierfloc,dustnetworkshouldbedesignedtoberemovable,tofacilitatetheclean-up,maintenance.DustofthegridnetworkinaccordancewiththespecificcircumstancesatthescenedeterminedthatdustaroundthenetandControlDepartmenttohandlethecombinationoftight.

Anti-corrosivegases:

thechemicalindustryinthisrelativelyMostofthiscanbeonthefrequencycountersinthecontrolroom.

（4）convertercablenorms

Signallinesandpowerlinesmustbeseparatelyalignment:

theuseofanalogsignalconverterforremotecontrol,inordertoreducetheanalogconverterandotherequipmentfromtheinterference,pleasecontrolsignalconverterlinewiththestrongel