外文文献翻译变频器设计使用参考Word格式文档下载.docx

外文文献翻译变频器设计使用参考Word格式文档下载.docx

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外文文献及译文

Converterreferencedesign

（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,inor