Kuleli sonto sizohlaziya ukusetshenziswa kwama-filimi capacitor esikhundleni sama-electrolytic capacitor kuma-DC-link capacitor.Lesi sihloko sizohlukaniswa izingxenye ezimbili.

Ngokuthuthukiswa kwemboni yamandla amasha, ubuchwepheshe bamanje obuguquguqukayo buvame ukusetshenziswa ngokufanele, futhi ama-capacitor e-DC-Link abaluleke kakhulu njengenye yemishini ebalulekile yokukhetha.Ama-capacitor e-DC-Link kuzihlungi ze-DC ngokuvamile adinga umthamo omkhulu, ukucutshungulwa kwamanje okuphezulu kanye ne-voltage ephezulu, njll. Ngokuqhathanisa izici zama-capacitor efilimu nama-electrolytic capacitor nokuhlaziya izinhlelo zokusebenza ezihlobene, leli phepha liphetha ngokuthi emiklamo yesekethe edinga amandla ombane aphezulu okusebenza, high ripple current (Irms), izidingo ze-over-voltage, ukuguqulwa kwamandla kagesi, i-inrush current ephezulu (dV/dt) nempilo ende.Ngokuthuthukiswa kobuchwepheshe bokufakwa komhwamuko owenziwe ngensimbi kanye nobuchwepheshe be-film capacitor, ama-filimi capacitor azoba umkhuba womklami ozothatha indawo yama-electrolytic capacitor ngokuya ngokusebenza kanye nentengo esikhathini esizayo.

Ngokwethulwa kwezinqubomgomo ezintsha ezihlobene namandla kanye nokuthuthukiswa kwemboni yezamandla amasha emazweni ahlukahlukene, ukuthuthukiswa kwezimboni ezihlobene kulo mkhakha kulethe amathuba amasha.Futhi ama-capacitor, njengemboni yomkhiqizo ehlobene nomfula obalulekile, nawo athole amathuba amasha okuthuthuka.Ezimotweni zamandla amasha nezamandla amasha, ama-capacitor ayizingxenye ezibalulekile ekulawuleni amandla, ukuphathwa kwamandla, i-inverter yamandla kanye nezinhlelo zokuguqula i-DC-AC ezinquma impilo yesiguquli.Kodwa-ke, ku-inverter, amandla e-DC asetshenziswa njengomthombo wamandla wokufaka, oxhunywe ku-inverter ngebhasi le-DC, elibizwa ngokuthi i-DC-Link noma i-DC support.Njengoba i-inverter ithola i-RMS ephezulu kanye nama-peak pulse currents kusuka ku-DC-Link, ikhiqiza i-high pulse voltage ku-DC-Link, okwenza kube nzima ngesiguquli ukuthi simelane.Ngakho-ke, i-DC-Link capacitor iyadingeka ukuze imunce i-high pulse current kusuka ku-DC-Link futhi ivimbele ukushintshashintsha kwe-high pulse voltage ye-inverter ingaphakathi kwebanga elamukelekayo;ngakolunye uhlangothi, iphinde ivimbele ama-inverter ukuthi angathinteki ngokudlula kwe-voltage kanye ne-over-voltage yesikhashana ku-DC-Link.

Umdwebo wohlelo lokusetshenziswa kwama-DC-Link capacitor kumandla amasha (okuhlanganisa ukuphehlwa kwamandla omoya kanye nokukhiqiza amandla e-photovoltaic) kanye nezinhlelo zokushayela imoto yamandla amasha kuboniswa kuMfanekiso 1 no-2.

Umfanekiso 1 ubonisa i-topology yesekethe yesiguquli samandla omoya, lapho i-C1 iyi-DC-Link (ngokuvamile ihlanganiswe nemojuli), i-C2 iwukumuncwa kwe-IGBT, i-C3 iwukuhlunga kwe-LC (uhlangothi lwenetha), kanye nokuhlunga kwe-C4 rotor ohlangothini lwe-DV/DT.Umfanekiso wesi-2 ubonisa ubuchwepheshe besekethe ye-PV yokuguqula amandla, lapho i-C1 iyi-DC ehlungayo, i-C2 ihlunga i-EMI, i-C4 iyi-DC-Link, i-C6 iwukuhlunga kwe-LC (uhlangothi lwegridi), i-C3 iwukuhlunga kwe-DC, kanti i-C5 iwukumuncwa kwe-IPM/IGBT.Umfanekiso wesi-3 ubonisa uhlelo oluyinhloko lokushayela izithuthuthu ohlelweni olusha lwemoto yamandla, lapho i-C3 iyi-DC-Link futhi i-C4 iyi-IGBT capacitor yokumunca.

Kulezi zicelo zamandla ezintsha ezishiwo ngenhla, ama-DC-Link capacitor, njengedivayisi eyinhloko, ayadingeka ekuthembekeni okuphezulu nokuphila isikhathi eside ezinhlelweni zokukhiqiza amandla omoya, izinhlelo zokuphehla amandla e-photovoltaic kanye nezinhlelo zemoto yamandla amasha, ngakho ukukhetha kwabo kubaluleke kakhulu.Okulandelayo ukuqhathanisa izici zefilimu capacitor kanye nama-electrolytic capacitor nokuhlaziywa kwawo ku-DC-Link capacitor application.

1.Ukuqhathanisa kwesici

1.1 Ama-capacitor amafilimu

Isimiso sobuchwepheshe be-metalization yefilimu yethulwa okokuqala: ungqimba oluncane lwensimbi olwanele lufakwe umhwamuko ebusweni bemidiya yefilimu emincane.Lapho kukhona isici esiphakathi nendawo, ungqimba luyakwazi ukuhwamuka futhi ngaleyo ndlela luhlukanise indawo enesici ukuze kuvikelwe, into eyaziwa ngokuthi ukuziphilisa.

Umfanekiso wesi-4 ubonisa umgomo wokuhlanganisa i-metalization, lapho imidiya yefilimu emincane ilungiswa ngaphambili (i-corona ngenye indlela) ngaphambi kokuhwamuka ukuze ama-molecule ensimbi akwazi ukunamathela kuyo.Insimbi iyahwamuka ngokuncibilika ekushiseni okuphezulu ngaphansi kwe-vacuum (1400 ℃ kuya ku-1600 ℃ nge-aluminium kanye no-400 ℃ kuya ku-600 ℃ nge-zinc), futhi umhwamuko wensimbi ujiya phezu kwefilimu lapho uhlangana nefilimu epholile (izinga lokushisa lokupholisa ifilimu -25 ℃ kuya -35 ℃), ngaleyo ndlela yakhe insimbi.Ukuthuthukiswa kobuchwepheshe be-metallization kuye kwathuthukisa amandla e-dielectric yefilimu ye-dielectric ngokujiya kweyunithi ngayinye, futhi idizayini ye-capacitor yomshini wokubhoboza noma wokukhipha umshini wobuchwepheshe owomile ingafinyelela ku-500V/µm, kanye nedizayini ye-capacitor yohlelo lokusebenza lwesihlungi se-DC ingafinyelela ku-250V. /µm.I-DC-Link capacitor ingeyakamuva, futhi ngokusho kwe-IEC61071 ye-capacitor yesicelo samandla kagesi ingamelana nokushaqeka okukhulu kwamandla kagesi, futhi ingafinyelela izikhathi ezi-2 ku-voltage elinganiselwe.

Ngakho-ke, umsebenzisi udinga kuphela ukucabangela i-voltage elinganiselwe yokusebenza edingekayo ekwakhiweni kwabo.Ama-capacitor efilimu ane-metallized ane-ESR ephansi, ebavumela ukuthi bamelane nemisinga emikhulu ye-ripple;i-ESL ephansi ihlangabezana nezidingo eziphansi ze-inductance design of inverters futhi inciphisa umphumela we-oscillation ekushintsheni ama-frequencies.

Ikhwalithi ye-dielectric yefilimu, ikhwalithi ye-metalization coating, umklamo we-capacitor kanye nenqubo yokukhiqiza inquma izici zokuziphilisa zama-capacitor metallized.Ifilimu ye-dielectric esetshenziselwa i-DC-Link capacitor ekhiqizwa ikakhulukazi ifilimu ye-OPP.

Okuqukethwe yisahluko 1.2 kuzoshicilelwa esihlokweni sangesonto elizayo.