Vhiki rino tichaongorora kushandiswa kwema capacitors efirimu pachinzvimbo chema capacitors emagetsi muma DC-link capacitors. Chinyorwa chino chichakamurwa kuita zvikamu zviviri.

Nekuvandudzwa kweindasitiri itsva yesimba, tekinoroji yemazuva ano inoshanduka-shanduka inowanzo shandiswa zvinoenderana, uye macapacitor eDC-Link anonyanya kukosha seimwe yemidziyo yakakosha pakusarudza. Macapacitor eDC-Link mumafirita eDC anowanzo da kugona kukuru, kugadzirisa magetsi akawanda uye voltage yakakwira, nezvimwewo. Nekuenzanisa hunhu hwemacapacitor emafirimu nemacapacitor emagetsi uye kuongorora mashandisirwo anoenderana, bepa iri rinogumisa kuti mumagadzirirwo emasekitori anoda voltage yakakwira yekushandisa, ripple current yakakwira (Irms), zvinodiwa ne over-voltage, voltage reversal, high inrush current (dV/dt) uye hupenyu hurefu. Nekuvandudzwa kwetekinoroji yesimbi yakaderedzwa vapor uye tekinoroji yecapacitor yemafirimu, macapacitor emafirimu achava tsika yemugadziri yekutsiva macapacitor emagetsi maererano nekushanda uye mutengo mune ramangwana.

Nekuiswa kwemitemo mitsva ine chekuita nesimba uye kukura kweindasitiri itsva yesimba munyika dzakasiyana-siyana, kukura kwemaindasitiri ane chekuita nebasa iri kwakaunza mikana mitsva. Uye ma capacitor, seindasitiri yakakosha yezvigadzirwa zvine chekuita nebasa, akawanawo mikana mitsva yekuvandudza. Mumotokari itsva dzesimba nemagetsi matsva, ma capacitor zvikamu zvakakosha mukutonga simba, manejimendi yesimba, inverter yesimba uye masisitimu ekushandura DC-AC anosarudza hupenyu hwechinoshandura. Zvisinei, mu inverter, simba reDC rinoshandiswa senzvimbo yemagetsi ekupinda, iyo yakabatana ne inverter kuburikidza ne DC bus, iyo inonzi DC-Link kana DC support. Sezvo inverter ichigamuchira RMS yakakwira uye peak pulse currents kubva kuDC-Link, inogadzira high pulse voltage paDC-Link, , zvichiita kuti zviomere inverter kutsungirira. Naizvozvo, DC-Link capacitor inodiwa kuti itore high pulse current kubva kuDC-Link uye kudzivirira kushanduka kwe high pulse voltage kwe inverter kuri mukati mehuwandu hunogamuchirwa; kune rumwe rutivi, inodzivirirawo ma inverters kuti asakanganiswa ne overshoot voltage uye transient over-voltage paDC-Link.

Dhayagiramu yekushandiswa kwemacapacitor eDC-Link musimba idzva (kusanganisira kugadzira simba remhepo uye kugadzira simba re photovoltaic) uye masisitimu emotokari itsva esimba inoratidzwa muMifananidzo 1 ne2.

Mufananidzo 1 unoratidza topology yedunhu rekushandura simba remhepo, apo C1 iri DC-Link (inowanzo batanidzwa nemodule), C2 iri IGBT absorption, C3 iri LC filtering (net side), uye C4 rotor side DV/DT filtering. Mufananidzo 2 unoratidza tekinoroji yePV power converter circuit, apo C1 iri DC filtering, C2 iri EMI filtering, C4 iri DC-Link, C6 iri LC filtering (grid side), C3 iri DC filtering, uye C5 iri IPM/IGBT absorption. Mufananidzo 3 unoratidza main motor drive system mu new energy vehicle system, apo C3 iri DC-Link uye C4 iri IGBT absorption capacitor.

Mukushandiswa kwesimba idzva kwataurwa pamusoro apa, macapacitor eDC-Link, semudziyo unokosha, anodiwa kuti avimbike zvakanyanya uye agare kwenguva refu mumasisitimu ekugadzira simba remhepo, masisitimu ekugadzira simba re photovoltaic uye masisitimu matsva emotokari dzesimba, saka kusarudzwa kwawo kwakakosha zvikuru. Izvi zvinotevera kuenzanisa hunhu hwemacapacitor efirimu nemacapacitor emagetsi uye ongororo yawo mukushandiswa kwecapacitor yeDC-Link.

1. Kuenzanisa zvinhu

1.1 Macapacitor emafirimu

Nheyo yetekinoroji yekugadzira simbi mumafirimu inotanga yatanga: simbi yakatetepa zvakakwana inopiswa pamusoro pechinhu chakatetepa. Kana paine chikanganiso muchinhu ichi, chinhu ichi chinokwanisa kupwanyika uye nokudaro chinoparadzanisa nzvimbo isina chikanganiso kuti chidzivirirwe, chiitiko chinozivikanwa sekuzviporesa.

Mufananidzo 4 unoratidza musimboti wekuputira simbi, uko simbi yakatetepa inogadziriswa kare (corona yezvimwe) isati yapiswa kuitira kuti mamorekuru esimbi akwanise kunamatira pairi. Simbi inonyungudika nekunyungudika pakupisa kwakanyanya pasi pevacuum (1400℃ kusvika 1600℃ yearuminiyamu uye 400℃ kusvika 600℃ yezinc), uye utsi hwesimbi hunoungana pamusoro pefirimu kana hwasangana nefirimu yakatonhorera (tembiricha yekutonhodza firimu -25℃ kusvika -35℃), nokudaro zvichigadzira simbi. Kuvandudzwa kwetekinoroji yesimbi kwakavandudza simba re dielectric refirimu pahuniti, uye dhizaini ye capacitor yekushandisa pulse kana discharge ye dry technology inogona kusvika 500V/µm, uye dhizaini ye capacitor yeDC filter application inogona kusvika 250V/µm. DC-Link capacitor ndeyekupedzisira, uye zvichienderana neIEC61071 yekushandiswa kwemagetsi emagetsi capacitor inogona kutsungirira voltage shock yakanyanya, uye inogona kusvika kaviri pane voltage yakayerwa.

Saka, mushandisi anongofanira kufunga nezve voltage yekushanda yakayerwa inodiwa pakugadzira kwavo. Ma capacitor efirimu ane metallized ane ESR yakaderera, iyo inovabvumira kutsungirira mafungu makuru; ESL yakaderera inosangana nezvinodiwa zvekugadzirwa kwe inductance yakaderera yema inverters uye inoderedza oscillation effect pa switching frequency.

Hunhu hwe dielectric yefirimu, hunhu hwesimbi inoputirwa, dhizaini ye capacitor uye maitiro ekugadzira zvinosarudza hunhu hwema capacitor esimbi anoporesa ega. Dielectric yefirimu inoshandiswa kuma capacitors eDC-Link anogadzirwa inonyanya kugadzirwa neOPP film.

Zviri muchitsauko 1.2 zvichaburitswa munyaya yevhiki rinouya.