Vhiki rino tichaongorora kushandiswa kwemafirimu capacitors panzvimbo ye electrolytic capacitors muDC-link capacitors.Chinyorwa ichi chichakamurwa kuita zvikamu zviviri.

Nekuvandudzwa kweindasitiri yesimba idzva, tekinoroji yemazuva ano inoshandiswa inowanzoshandiswa zvinoenderana, uye DC-Link capacitors inonyanya kukosha seimwe yemidziyo yakakosha yekusarudza.Iyo DC-Link capacitors muDC mafirita kazhinji inoda huwandu hukuru, yakakwirira ikozvino kugadzirisa uye yakakwirira voltage, nezvimwewo. Nokuenzanisa hunhu hwemafirimu capacitor uye electrolytic capacitors uye kuongorora mashandisirwo anoenderana, bepa rino rinopedzisa kuti mumagadzirirwo edunhu anoda high operating voltage, high ripple current (Irms), over-voltage zvinodiwa, voltage reversal, high inrush current (dV/dt) uye hupenyu hurefu.Nekuvandudzwa kwemetallised vapor deposition tekinoroji uye tekinoroji capacitor tekinoroji, mafirimu capacitors anozova maitiro emugadziri kutsiva electrolytic capacitors maererano nekuita uye mutengo mune ramangwana.

Nekuiswa kwemitemo mitsva ine chekuita nemagetsi uye kuvandudzwa kweindasitiri yemagetsi matsva munyika dzakasiyana siyana, kusimudzirwa kwemaindasitiri ane hukama mundima iyi kwakaunza mikana mitsva.Uye ma capacitor, seyakakosha kumusoro kwakabatana chigadzirwa indasitiri, akawanawo mikana mitsva yebudiriro.Mune magetsi matsva uye magetsi matsva, capacitors zvinhu zvakakosha mukutonga kwesimba, simba rekutonga, simba inverter uye DC-AC inoshandura masisitimu ayo anotarisisa hupenyu hweshanduko.Nekudaro, mune inverter, DC simba rinoshandiswa seyekupinza magetsi sosi, iyo yakabatana kune inverter kuburikidza neDC bhazi, iyo inonzi DC-Link kana DC rutsigiro.Sezvo iyo inverter inogamuchira yakakwira RMS uye peak pulse currents kubva kuDC-Link, inogadzira yakakwira pulse voltage paDC-Link, zvichiita kuti zviome kuti inverter imire.Naizvozvo, iyo DC-Link capacitor inodiwa kuti itore iyo yakakwira pulse ikozvino kubva kuDC-Link uye kudzivirira iyo yakakwira pulse voltage fluctuation ye inverter iri mukati meiyo inogamuchirwa renji;kune rumwe rutivi, inodzivirirawo ma inverters kuti asakanganiswa nevoltage overshoot uye yenguva pfupi pamusoro-voltage paDC-Link.

Iyo schematic dhizaini yekushandiswa kweDC-Link capacitors musimba idzva (kusanganisira kugadzirwa kwesimba remhepo uye photovoltaic simba rekugadzira) uye itsva simba mota mota dhiraivha masisitimu anoratidzwa muFigure 1 ne2.

Mufananidzo 1 unoratidza simba remhepo rinoshandura redunhu topology, uko C1 iri DC-Link (kazhinji yakabatanidzwa kune module), C2 iri IGBT kutora, C3 iri LC kusefa (net side), uye C4 rotor divi DV/DT kusefa.Mufananidzo 2 unoratidza PV simba rekushandura redunhu tekinoroji, uko C1 iri DC kusefa, C2 iri EMI kusefa, C4 iri DC-Link, C6 iri LC kusefa (grid side), C3 iri DC kusefa, uye C5 iri IPM/IGBT kutorwa.Mufananidzo 3 unoratidza iyo huru mota dhiraivha system mune itsva simba mota system, uko C3 iri DC-Link uye C4 iri IGBT absorption capacitor.

Mune zvakataurwa pamusoro apa mashandisirwo emagetsi matsva, DC-Link capacitors, sechinhu chakakosha, inodiwa kuti ivimbike zvakanyanya uye hupenyu hurefu mumhepo yekugadzira magetsi masisitimu, photovoltaic magetsi ekugadzira masisitimu uye itsva magetsi emagetsi masisitimu, saka kusarudzwa kwavo kunonyanya kukosha.Izvi zvinotevera kuenzanisa kwemaitiro emufirimu capacitors uye electrolytic capacitors uye kuongorora kwavo muDC-Link capacitor application.

1.Feature kuenzanisa

1.1 Mafirimu capacitors

Iyo musimboti weiyo firimu metallization tekinoroji inotanga kuunzwa: yakaringana nhete yesimbi inonyungudika pamusoro peiyo yakatetepa firimu media.Muhupo hwekuremara mukati, jira rinokwanisa kunyunguduka uye nokudaro rinoparadzanisa nzvimbo yakakanganisika yekudzivirira, chiitiko chinozivikanwa sekuzviporesa.

Mufananidzo 4 unoratidza musimboti wemetalization coating, uko iyo yakatetepa firimu midhiya inotaridzirwa (corona yeimwe neimwe) isati yavapo vaporization kuitira kuti mamorekuru esimbi anamate pairi.Simbi inonyungudika nekunyunguduka pakupisa kwepamusoro pasi pevacuum (1400 ℃ kusvika 1600 ℃ yealuminium uye 400 ℃ kusvika 600 ℃ ye zinc), uye mhute yesimbi inonyungudutswa pamusoro pefirimu painosangana nefirimu yakatonhorera (kutonhora kwefirimu kutonhora. -25 ℃ kusvika -35 ℃), nokudaro vachigadzira simbi yesimbi.Iko kuvandudza tekinoroji yemetallization yakavandudza simba redhielectric yefirimu dielectric pahukobvu hweyuniti, uye dhizaini yecapacitor yekupuruzira kana kuburitsa kushandiswa kweiyo yakaoma tekinoroji inogona kusvika 500V/µm, uye uye dhizaini yecapacitor yeDC sefa application inogona kusvika 250V. /µm.DC-Link capacitor ndeyekupedzisira, uye maererano neIEC61071 yemagetsi emagetsi application capacitor inogona kumira zvakanyanya kutyisa voltage, uye inogona kusvika kaviri payakayerwa voltage.

Naizvozvo, mushandisi anongoda kufunga nezve yakayerwa yekushanda voltage inodiwa pakugadzira kwavo.Metallized film capacitors vane ESR yakaderera, iyo inovabvumira kuti vatsungirire yakakura ripple currents;iyo yakaderera ESL inosangana nezvakaderera inductance dhizaini zvinodiwa zvemainverters uye inoderedza oscillation mhedzisiro pakuchinja ma frequency.

Hunhu hwefirimu dielectric, kunaka kwesimbi yesimbi, iyo capacitor dhizaini uye magadzirirwo ekugadzira anotarisisa maitiro ekuzviporesa emetallized capacitors.Iyo firimu dielectric inoshandiswa kuDC-Link capacitors inogadzirwa inonyanya kuve firimu reOPP.

Zviri muchitsauko 1.2 zvichaburitswa muchinyorwa chesvondo rinouya.