1、ConstantpressurewatersupplyfrequencychangerThetransistorfrequencychangernotonlyovercamehasformerlyexchangedvelocitymodulationmanyshortcomings/moreoverthevelocitymodulationperformancemightcomparefavorablywiththedirectcurrentmotorvelocitymodulationperformance/Thethree-phaseasynchronousmotorhastheservi
2、cetobeconvenient/meritandsoonpricesmalladvantage/powerandrotationalspeedadaptbreadth/itsfrequencyconversionvelocitymodulationtechnologyintheminiaturization/thelowcostandtheredundantreliableaspectholdstheobvioussuperiority/Totheendofthe80s/thealternatingcurrentmachinefrequencyconversionvelocitymodula
3、tiontechnologyrapidlydevelopsintoamaturetechnology/itwillsupplythealternatingcurrentmachinethelaborfrequencyalternatingcurrentsupplytoturndirectcurrentafterthedioderectification/againbycomponentandsoonIGBTorGTRmodulecounterwillturnthealternatingcurrentsupplywhichthefrequencymightmove/willdrivetheele
4、ctricalmachinerybythispowersourcetomoveunderthespeedchangecondition/andautomaticsuitablestrainloadcondition/Afteritchangedinthetraditionalindustrytheelectricalmachinerytostartonlycanbytheratedpower/decidetherotationalspeedthesolemovementway/thusachievedtheenergyconservationgoal/Themodernfrequencycon
5、versionvelocitymodulationtechnologyappliesintheelectricpowerwaterpumpwatersupplysystem/Becausethefrequencyconversionvelocitymodulationhasthevelocitymodula-tionthephysicalcharacteristicswell/efficiencyhigh/velocitymodulationscope-wide/precisionhigh/adjustingcharactercurvesmooth/maycontinualrealize/th
6、esteadyvelocitymodulation/thevolumesmall/themaintenancesimpleisconven-ient/theautomatedlevelhigheraseriesofprominentmeritsbuttimepeoplesfavor/Whenitappliesespeciallyintheairblower/thewaterpumpandsoonthelargecapacityload/mayobtaintheenergyconservationeffectwhichothervelocitymodulationwaysisunabletoco
7、mpare/Thefrequencyconversionvelocitymodulationsystemmainequipmentisprovidesthefrequencyconversionpowersourcethefrequencychanger/thefrequencychangermaydivideintoexchange-directcurrent-toexchangethefrequencychangerandtheexchange-exchangesthefrequencychangertwobigkinds/atpresentdomesticmostlyuseshandso
8、ver-isstraight-handsoverthefrequencychanger/Hasbeenpublishedsincethegeneralfrequencychanger/thefrequencyconversionvelocitymodulationtechnologyobtainedthewidespreadapplicationineachdomain/Thefrequencyconversionmodulatesvelocitythepermanentwaterlevelfeedwaterequipmentbyitsenergyconservation/security/h
9、ighqualitymeritandsoonwatersupplyquality/causedourcountrytosupplywatertheprofessiontechnicalequipleveltostartfromthebeginningofthe90stoexperiencealeap/Theconstantpressure/thepermanentwaterlevelwatersupplyvelocitymodula-tionsystemrealizationwaterpumpelectricalmachinerysteplessspeedregulation/restsonw
10、iththewaterlevelchangeregulatorsystemmovementparameter/inthewaterconsumptionchangeregulatorsystemmovementparameter/changeswhenthewaterconsumptionmaintainsthehydraulicpressuretobeconstantandthewaterlevelconstantlybysatisfiesthewaterusedrequest/isnowmostadvanced/thereasonableenergyconservationwatersup
11、plysystem/Obtainedtheverybigdevelopmentinthepracticalapplication/Alongwiththeelectricpowerelectronictechnologyrapiddevelopment/thefrequencychangerfunctionmoreandmoreisalsostrong/Fullyuseseachkindoffunctionwhichinthefrequencychangersets/tothereasonabledesignfrequencyconversionvelocitymodulationconsta
12、ntpressurefeedwaterequipment/reducesthecost/guaranteedaspectandsoonproductqualityhastheextremelyvitalsignificance/Intheshortseveralyears/thefrequencyconversionvelocitymodulationconstantpressurewatersupplysystemexperiencedthedevelopingprocesswhichconsummatedgradually/theearlytimehaspumpedthevelocitym
13、odulationconstantpressuresystemtopumponlythevelocitymodulationsystemtoreplacegradually/Althoughonlypumpsthevelocitymodulationsystemdesignsimplereliable/butbecauseonlypumpstheelectricalmachinerydepthvelocitymodulationtocreatethewaterpump/theelectricalmachineryoperatingefficiencylowly/butpumpstheveloc
14、itymodulationsysteminvestmentmoretosave/theoperatingefficiencyishigh/bytheactualproofisthemostsuperiorsystemdesign/veryquicklydevelopsintotheleadingproduct/TheSemensfrequencychangerdesignlevelcompareswithvariousbrandsfrequencychanger/thefunctionisformidable/impeccable!Ifagaincanfromthedesignconsider
15、willserviceconvenienttothefuture/Thenatureandenhancedthecomponentsinthemanufactureselectionthequalityismostideal/TheSemensfrequencychangerrectificationunitpressureresistanceis1200V/Ifcanusepressureresistance1600Vtherectificationunit/Ithoughtcanenhancethestabilitygreatlyandreducethefailurerate/Guards
16、againstthedisturbancethemeasuretowaitforstrengthens/SemensfrequencychangersometimescanbutcontrolbecauseofthedisturbancequestionthehosttheboardorI/TheOportburnt/Theconstantpressurewatersupplyseriesfrequencyconversionvoltmetersisfortheairblower/pumpskind/currentcapacityandthespecial-purposefrequencyco
17、nversionvoltmetersthepressurecontrolcharacteristicspeciallyandsoonaircompressorwhichbutdevelops/Thisaircrafttypehasthegeneralfrequencychangerthebasicfunction/Thisproductdesignhadmainlyconsideredtheenergyconservationandtheautomatedrequest/insetsattheautomaticenergyconservation/PID/simplePLCandfunctio
18、nandsoonRS485communicationconnection/mayfacilitateandPLC/thecomputerorthemainlinecarriesonthecommunication/theconvenientcustomeroperationandthemonitoring/atthesametimethiscompanyalsospeciallydevelopedonekindtoprocesstheconstantpressurewatersupplyspeciallythecontrolpanel/mightconvenientlybeusedtogeth
19、erwiththefarbiographypressuregauge/First/frequencyconversionconstantpressurewatersupplycharacteristic/1st/thefrequencyconversionconstantpressureforthehydro-energyautomatic24hourmaintenancesconstantpressure/andautomaticallystartstherelaypumpaccordingtothepressuresignal/thestepless-adjustmentpressure/
20、thewatersupplyqualityisgood/compareswiththetraditionalwatersupply/cannotcreatethepipenetworktoburstandthewatercockresonanceeffect/2nd/thestartissmooth/reducestheelectricalmachinerywaterpumptheimpact/lengthenedtheelectricalmachineryandthewaterpumpservicelife/hasavoidedinthetraditionalwatersupplyimpin
21、gementphenomenon/3rd/usesthefrequencyconversionconstantpressurewatersupplyprotectionfunctioncompletely/themovementisreliable/hasowespresses/haspressed/hasflowed/protectionfunctionandsoontheheat/5th/mayaccordingtotheuserneed/chooseeachkindofattachmentfunction/forexample/Theelectricalmachineryfixedtim
22、etakesturns/functionandsoondormancy/Second/principleofwork/Thefrequencyconversionconstantpressurewatersupplysystemusesapotentiometerhypothesispressure(alsotobepossibletousekneadingboardinteriorhypothesispressure)/usesapressuretransmitter(feedbackis4-20mA)examinesinthepipenetworkthepressure/thepressu
23、retransmittersendsinthesignalthefrequencychangerPIDreturnroute/afterPIDreturnrouteprocessing/sendsoutawatervolumetoincreaseorthereducedsignal/controlsthemotorrotationalspeed/Likeincertaindelaytime/pressureinsufficiencyoroversized/thendoesworkthefrequencythroughPLC/Thefrequencyconversioncut/causesthe
24、actualpipenetworkpressuretobeconsistentwiththehypothesispressure/Moreover/alongwiththewaterconsumptionreduction/thefrequencychangerautomaticreductionoutputfrequency/hasachievedtheenergyconservationgoal/Third/applicablescope/Usesthefrequencyconversionconstantpressurewatersupply/hasthehighlyeffectivee
25、nergyconservation/thepressurestable/movementreliable/operationsimple/installmentconvenient/occupyingalandareaoffew/thenoiseislow/doesnothavethepollution/investslowly/benefithighermerit/Issuitablespeciallyfor/1/Placetheandsoonguesthouse/office/apartment/inhabitantplotlifegivestheheatofhydrationwaterheatingsystem/2/Thehigh-riseconstruction/thelarge-scalecivilconstructionfirepreventiongivestheaqueoussystem/3/Industryandminingproductionenterprise/4/Eachkindofrunningwaterfactory/
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