Characteristics of China's power capacitor industry development
Atpresent,themainfeaturesofthedevelopmentofChina'spowercapacitorindustryareasfollows:(1)Electrolyticcapacitors,ceramiccapacitorsandorganicfilmcapacitorsaccountformorethan90%ofthetotalcapacitorproduction.Amongthem,ceramiccapacitorswillstilldominatetheworldcapacitormarket,andchipcapacitorswilldominatetheceramiccapacitorandtantalumcapacitormarket.Miniaturization,largecapacity,highvoltageandhighfrequency,anti-jammingandarrayingwillcontinuetobethedirectionofceramiccapacitordevelopment.(2)Smallsize,largecapacity,longlife,hightemperatureresistance,lowequivalentseriesresistance,etc.arestillthedevelopmentdirectionofaluminumelectrolyticcapacitors.(3)Chipproductscontinuetoleadthedevelopmentoftantalumcapacitorsinthedirectionofminiaturization,largecapacity,andlowimpedance,andtheproductionandapplicationoffunctionalpolymertantalumcapacitorswillbefurtherexpanded.(4)Themarketdemandandmarketshareofplasticfilmcapacitorswilldecline,butthedemandformetallizedplasticfilmcapacitorswillincrease,andthedemandforplasticfilmcapacitorsforinformationandcommunicationequipmentwillincrease,andplasticfilmsforinformationandcommunicationequipmentwillincrease.Thecapacitormarketwillcontinuetoexpand.Highfrequency,meetingsafetystandards,hightemperatureresistance,miniaturization,andchipformationwillbethedevelopmentdirectionofthiscapacitor.Inshort,theoveralleconomicoperationofthedomesticcapacitorindustryisrelativelystable.Asalargecapacitorproducingcountry,itisthedirectionofourultimateefforts.
Classification and main use of power capacitors
ClassificationandmainuseofpowercapacitorsPowercapacitorsarecapacitorsusedinpowersystemsandelectricalequipment.Itischaracterizedbyhighpower,highvoltageandlowfrequency,soitishuge.In1926,powercapacitorsbegantobefactory-producedandofficiallyappliedinpowersystems.Withtheestablishmentoflargepowerplantsandlong-distancetransmissionsystems,andthedevelopmentofemergingscienceandtechnologyfields,thevarietyandcapacityofpowercapacitorshavebeenrapidlydeveloped.Intheearly1950s,thelargestsingle-capacitycapacityofparallelcapacitorswas25kvar-kvar.By1978,thelargestsingle-unitcapacityhadreached6667kvar,andinthe1980sithadreachedasinglecapacityof10,000kilowatts.Currently,powercapacitorsaremovingtowardhighercapacity.Therearemanytypesofpowercapacitors.Accordingtotheirinstallationmethods,theycanbedividedintoindoorandoutdoortypes.Accordingtotheirratedvoltage,theycanbedividedintolowvoltageandhighvoltage.Accordingtotheirphasenumber,theycanbedividedintosinglephaseandthreephase.Exceptforthelow-voltageparallelcapacitors,therestaresingle-phase;accordingtotheshellmaterial,itcanbedividedintometalshell,porcelaininsulatingshell,bakelitecylindershell,etc.;accordingtoitsuse,itcanbedividedintothefollowingeightkinds.(1)Shuntcapacitor:formerlyknownasphaseshiftcapacitor.Itismainlyusedtocompensatethereactivepoweroftheinductiveloadofthepowersystemtoimprovethepowerfactor,improvethevoltagequalityandreducethelineloss.Single-phaseshuntcapacitorsaremainlycomposedofthecore,theoutercasingandtheoutletstructure.Themetalfoil(asaplate)iswoundupwithaninsulatingpaperoraplasticfilm,andapluralityofcomponents,insulators,andfastenersarepress-fittedtoformacapacitorcore,andtheinsulatingoilisimmersed.Theleadwiresofthecapacitorplateareledtotheoutletconnectionpieceatthelowerendoftheoutletporcelainsleeveafterbeingconnectedinseriesandinparallel.Themetalcasingofthecapacitorisfilledwithinsulatingmediumoil.(2)Seriescapacitors:connectedinseriesinpowerfrequencyhigh-voltagetransmissionanddistributionlinestocompensatethedistributioninductanceoftheline,improvethestaticanddynamicstabilityofthesystem,improvethevoltagequalityoftheline,lengthenthetransmissiondistanceandincreasethetransmission.Capacity.Itsbasicstructureissimilartoaparallelcapacitor.(3)Couplingcapacitor:Itismainlyusedforhigh-frequencycommunication,measurement,control,protectionofhigh-voltagepowerlinesandcomponentsusedindevicesforextractingelectricenergy.Thehighvoltageendofthecouplingcapacitorisconnectedtothepowerline,andthelowvoltageendisgroundedviathecouplingcoil,sothatthehighfrequencycarrierdeviceiscoupledtothehighvoltagelineatalowvoltage.Thecouplingcapacitorcaseiscomposedofabottomandacovermadeofaporcelainsleeveandasteelplate.Adilatormadeofthinsteelplateisplacedintheoutercasingtocompensateforthechangeinthevolumeoftheimpregnantwithtemperature.(4)Circuitbreakercapacitor:formerlyknownasvoltageequalizingcapacitor.Itismainlyusedforparallelvoltageequalizationonthefractureoftheultra-highvoltagecircuitbreaker,sothatthevoltagebetweenthefracturesisuniformduringthebreakingprocessanddisconnection,andthearc-extinguishingcharacteristicsofthecircuitbreakercanbeimprovedandthebreakingcapacitycanbeimproved.Thestructureofacommonlyusedcircuitbreakercapacitorissimilartothatofacouplingcapacitor.Withthedevelopmentofhigh-voltageceramiccapacitors,ceramiccapacitorshavebeenusedascapacitivecomponents,andthencasingsmadeofporcelainsleevesandsteelplatesareusedtoformcircuitbreakercapacitors.(5)Electrothermalcapacitor:usedinanelectricheatingsystemwithafrequencyof40Hz—24000Hztoimprovethepowerfactorandimprovethevoltageorfrequencyofthecircuit.Electricheatingcapacitorsmusthaveagoodheatdissipationduetotheirlargeamountofheat.Usually,theplatesarecooledbywater.Applicabletoelectricheatingcapacitorsabove4000Hz,theoutercasingisweldedwithbrassplate.(6)Pulsecapacitor:Itmainlyfunctionsasastorageenergy.Itischargedbyapowersourcewithasmallpowerforalongperiodoftime,andthenoscillatedordischargedwithoutoscillatinginashorttime,andalargeimpactpowercanbeobtained.Pulsecapacitorsarewidelyused,suchasbasicvoltageenergystoragecomponentssuchassurgevoltagegenerators,surgecurrentgenerators,andcircuitbreakertestcircuitbreakers.(7)DCandfiltercapacitors:usedinhighvoltageDCdevicesandhighvoltagerectifierfilterdevices.AnACfiltercapacitorcanbeusedtofilterouthigherharmoniccomponentsinthepowerfrequencycurrent.(8)Standardcapacitor:usedinthepowerfrequencyhigh-voltagemeasurementmediumlosscircuit,asastandardcapacitororasacapacitorvoltagedividerformeasuringhighvoltage.Standardcapacitorsrequireaccurateandstablecapacitancevalues,sogasanddoubleshieldedcoaxialcylindricalandconcentricsphericalplatesystemsareoftenused.
China is expected to become the world's largest electronics market in 5 years
HongJing,directoroftheInstituteofElectronicScienceandTechnologyInformationoftheMinistryofIndustryandInformationTechnology,saidinChengduafewdaysagothattheemergingcountrymarketwillbecomeanewengineforthedevelopmentoftheglobalelectronicinformationindustry,andChinaisexpectedtosurpasstheUnitedStateswithinthreetofiveyears,becomingtheworld'slargestElectronicproductmarket. Atthe11thChinaInternationalSoftwareCooperationFairheldonApril11,HongJingyireleasedthe"2012WorldInformationTechnologyIndustryDevelopmentAnnualReport".Thisreportprovidesacomprehensiveandin-depthanalysisofthedevelopmentoftheglobalelectronicinformationindustryin2012. HongJingyisaidthatunderthecombinedeffectofvariousfactors,thegrowthrateofproductionandsalesofglobalelectronicinformationproductsmanufacturingindustryin2012furthersloweddown.Theoutputvalueoftheglobalelectronicinformationindustrymanufacturingindustryin2011was4.8%,only1.54%in2012,andthegrowthrateofoutputvalueofvarioussub-productsdidnotexceed5%,ofwhichnegativegrowthoccurredinthefieldsofconsumerelectronics. Thereportpointedoutthattheelectronicinformationproductsmarketindevelopedcountrieshasgenerallyshrunk,andemergingcountriesshouldertheheavyresponsibilityofindustrialgrowth.Amongthetoptencountries,themarketgrowthrateofmorethan5%isonlyChina,Brazil,India,threeBRICcountries;theUSmarketgrowthrateisonly1%,Japanandotherdevelopedcountriesevenhavenegativegrowth“ChinaelectronicsmarketItisexpectedtosurpasstheUnitedStateswithinthreetofiveyearsandbecometheworld'slargestelectronicsmarket.”HongJingsaid. Thereportbelievesthattheworld'selectronicinformationindustrywillcontinuetogrowinthenextthreeyears,andthestatusofemergingeconomieswillcontinuetorise.Itisestimatedthatby2015,theglobalmarketwillreach2.1trillionUSdollars,withanaverageannualgrowthrateofabout4%.Fromtheperspectiveofregionalpattern,themarketshareofAsiaandotheremergingeconomieswillcontinuetogrow.ThemarketshareofdevelopedeconomiessuchastheUnitedStates,EuropeandJapanwilldeclineslightly,andtheemergingmarketwillbecomeanewengineforthedevelopmentoftheglobalelectronicinformationindustry.
