Kuleli sonto sizohlaziya ukusetshenziswa kwama-capacitor amafilimu 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 namandla 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-voltage ye-pulse ephezulu 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 esimaphakathi, 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 amafrikhwensi.

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.