Lub lim tiam no peb tab tom yuav tshuaj xyuas kev siv cov yeeb yaj kiab capacitors es tsis txhob electrolytic capacitors hauv DC-link capacitors.Kab lus no yuav muab faib ua ob ntu.

Nrog rau txoj kev loj hlob ntawm kev lag luam hluav taws xob tshiab, kev siv thev naus laus zis tsis sib xws yog feem ntau siv raws li, thiab DC-Link capacitors tseem ceeb tshwj xeeb yog ib qho ntawm cov khoom siv tseem ceeb rau kev xaiv.DC-Link capacitors nyob rau hauv DC lim feem ntau xav tau lub peev xwm loj, kev ua haujlwm siab tam sim no thiab cov hluav taws xob siab, thiab lwm yam. Los ntawm kev sib piv cov yam ntxwv ntawm cov yeeb yaj kiab capacitors thiab electrolytic capacitors thiab txheeb xyuas cov kev siv cuam tshuam, daim ntawv no xaus lus tias hauv Circuit Court tsim yuav tsum muaj kev khiav hauj lwm siab, siab ripple tam sim no (Irms), tshaj-voltage yuav tsum, voltage reversal, siab inrush tam sim no (dV / dt) thiab lub neej ntev.Nrog rau txoj kev loj hlob ntawm metallized vapor deposition technology thiab zaj duab xis capacitor technology, zaj duab xis capacitors yuav ua ib tug qauv rau designer los hloov electrolytic capacitors nyob rau hauv cov nqe lus ntawm kev ua tau zoo thiab nqi nyob rau hauv lub neej yav tom ntej.

Nrog rau kev qhia txog lub zog tshiab ntsig txog cov cai thiab kev tsim kho tshiab ntawm kev lag luam hluav taws xob hauv ntau lub teb chaws, kev txhim kho cov kev lag luam muaj feem xyuam hauv daim teb no tau coj cov cib fim tshiab.Thiab capacitors, raws li qhov tseem ceeb ntawm kev lag luam khoom lag luam, kuj tau txais txoj hauv kev tshiab.Nyob rau hauv lub zog tshiab thiab lub zog tshiab tsheb, capacitors yog cov khoom tseem ceeb hauv kev tswj lub zog, kev tswj fais fab, lub zog inverter thiab DC-AC hloov dua siab tshiab systems uas txiav txim siab lub neej ntawm lub converter.Txawm li cas los xij, hauv inverter, DC lub zog yog siv los ua cov khoom siv hluav taws xob, uas txuas nrog lub inverter los ntawm DC tsheb npav, uas yog hu ua DC-Txuas lossis DC kev txhawb nqa.Txij li thaum lub inverter tau txais siab RMS thiab ncov mem tes tam sim no los ntawm DC-Txuas, nws tsim cov mem tes siab ntawm DC-Txuas, ua rau nws nyuaj rau lub inverter tiv taus.Yog li ntawd, DC-Link capacitor yog xav tau los nqus cov mem tes siab tam sim no los ntawm DC-Txuas thiab tiv thaiv qhov siab pulse voltage fluctuation ntawm lub inverter yog nyob rau hauv qhov kev pom zoo;Ntawm qhov tod tes, nws tseem tiv thaiv cov inverters los ntawm kev cuam tshuam los ntawm qhov hluav taws xob overshoot thiab ib ntus dhau-voltage ntawm DC-Txuas.

Daim duab schematic ntawm kev siv DC-Link capacitors nyob rau hauv lub zog tshiab (xws li cua fais fab tiam thiab photovoltaic fais fab tuag) thiab lub zog tshiab lub tsheb tsav lub cev muaj zog yog qhia hauv daim duab 1 thiab 2.

Daim duab 1 qhia cov cua fais fab converter Circuit Court topology, qhov twg C1 yog DC-Txuas (feem ntau ua ke rau lub module), C2 yog IGBT nqus, C3 yog LC filtering (net side), thiab C4 rotor sab DV/DT filtering.Daim duab 2 qhia txog PV fais fab converter circuit technology, qhov twg C1 yog DC filtering, C2 yog EMI filtering, C4 yog DC-Txuas, C6 yog LC filtering (daim phiaj), C3 yog DC filtering, thiab C5 yog IPM / IGBT nqus.Daim duab 3 qhia txog lub ntsiab tsav lub cev muaj zog hauv lub tsheb tshiab lub zog, qhov twg C3 yog DC-Txuas thiab C4 yog IGBT absorption capacitor.

Nyob rau hauv cov lus hais saum toj no hais txog kev siv hluav taws xob tshiab, DC-Link capacitors, raws li cov cuab yeej tseem ceeb, yuav tsum muaj kev ntseeg siab thiab lub neej ntev hauv cov tshuab hluav taws xob tsim hluav taws xob, cov tshuab hluav taws xob photovoltaic thiab lub zog tsheb tshiab, yog li lawv cov kev xaiv tseem ceeb tshwj xeeb.Cov hauv qab no yog kev sib piv ntawm cov yam ntxwv ntawm zaj duab xis capacitors thiab electrolytic capacitors thiab lawv cov kev tsom xam hauv DC-Link capacitor daim ntawv thov.

1.Qhov kev sib piv

1.1 Zaj duab xis capacitors

Lub hauv paus ntsiab lus ntawm zaj duab xis metallization thev naus laus zis yog thawj zaug: txheej txheej hlau txaus txaus yog vaporized rau saum npoo ntawm cov yeeb yaj kiab nyias.Nyob rau hauv lub xub ntiag ntawm ib tug tsis xws luag nyob rau hauv nruab nrab, lub txheej muaj peev xwm evaporate thiab yog li cais qhov chaw tsis xws luag rau kev tiv thaiv, ib tug tshwm sim hu ua nws tus kheej-kho.

Daim duab 4 qhia txog lub hauv paus ntsiab lus ntawm metallization txheej, qhov twg cov yeeb yaj kiab nyias yog pretreated (corona ntawm lwm yam) ua ntej vaporization kom cov hlau molecules tuaj yeem ua raws li nws.Cov hlau yog evaporated los ntawm dissolving ntawm kub kub nyob rau hauv lub tshuab nqus tsev vacuum (1400 ℃ to 1600 ℃ rau txhuas thiab 400 ℃ to 600 ℃ rau zinc), thiab cov hlau vapor condensed rau saum npoo ntawm zaj duab xis thaum nws ntsib cov zaj duab xis txias (zaj duab xis txias kub. -25 ℃ to -35 ℃), yog li tsim cov hlau txheej.Kev txhim kho ntawm kev siv tshuab metallization tau txhim kho lub zog dielectric ntawm cov yeeb yaj kiab dielectric hauv ib chav tsev tuab, thiab kev tsim cov capacitor rau mem tes los yog tso tawm daim ntawv thov ntawm cov tshuab qhuav tuaj yeem ncav cuag 500V / µm, thiab tsim cov capacitor rau DC lim daim ntawv thov tuaj yeem ncav cuag 250V. /µm.DC-Txuas capacitor belongs rau tom kawg, thiab raws li IEC61071 rau lub hwj chim electronics daim ntawv thov capacitor tuaj yeem tiv taus hluav taws xob ntau dua, thiab tuaj yeem ncav cuag 2 npaug ntawm qhov ntsuas hluav taws xob.

Yog li ntawd, tus neeg siv tsuas yog yuav tsum xav txog qhov ntsuas kev ua haujlwm voltage xav tau rau lawv tus qauv tsim.Metallized zaj duab xis capacitors muaj ESR qis, uas tso cai rau lawv tiv taus cov dej ntws loj dua;Qhov qis ESL ua tau raws li qhov kev tsim qauv qis inductance ntawm inverters thiab txo cov nyhuv oscillation ntawm kev hloov zaus.

Qhov zoo ntawm cov yeeb yaj kiab dielectric, qhov zoo ntawm cov txheej txheem metallization, tus qauv tsim capacitor thiab cov txheej txheem tsim khoom txiav txim siab txog tus kheej kho tus yam ntxwv ntawm cov metallized capacitors.Cov zaj duab xis dielectric siv rau DC-Link capacitors tsim yog feem ntau OPP zaj duab xis.

Cov ntsiab lus ntawm tshooj 1.2 yuav muab luam tawm rau lub lim tiam tom ntej tsab xov xwm.