A wannan makon za mu yi nazari kan amfani da capacitors na fina-finai a maimakon na’urorin lantarki a cikin masu iya amfani da wutar lantarki na DC.Za a raba wannan labarin zuwa kashi biyu.

Tare da haɓaka sabbin masana'antar makamashi, ana amfani da fasaha mai canzawa ta yau da kullun yadda ya kamata, kuma DC-Link capacitors suna da mahimmanci musamman azaman ɗayan manyan na'urori don zaɓi.A DC-Link capacitors a DC tace kullum bukatar babban iya aiki, high halin yanzu aiki da kuma high ƙarfin lantarki, da dai sauransu Ta kwatanta da halaye na fim capacitors da electrolytic capacitors da kuma nazarin da related aikace-aikace, wannan takarda ƙarasa da cewa a cikin kewaye kayayyaki bukatar high aiki ƙarfin lantarki. high ripple halin yanzu (Irms), over-voltage bukatun, ƙarfin lantarki koma baya, high inrush halin yanzu (dV/dt) da kuma tsawon rai.Tare da haɓaka fasahar saka tururi mai ƙarfe da fasahar capacitor na fim, masu ƙarfin fim za su zama yanayi don mai ƙira don maye gurbin masu ƙarfin lantarki dangane da aiki da farashi a nan gaba.

Tare da bullo da sabbin tsare-tsare masu alaka da makamashi da bunkasa sabbin masana'antun makamashi a kasashe daban-daban, ci gaban masana'antu masu alaka a wannan fanni ya kawo sabbin damammaki.Kuma capacitors, a matsayin mahimmin masana'antar samfur mai alaƙa, suma sun sami sabbin damar ci gaba.A cikin sabon makamashi da sabbin motocin makamashi, masu ƙarfin wuta sune mahimman abubuwan sarrafa makamashi, sarrafa wutar lantarki, mai canza wutar lantarki da tsarin jujjuyawar DC-AC waɗanda ke ƙayyade rayuwar mai canzawa.Duk da haka, a cikin inverter, ana amfani da wutar lantarki a matsayin tushen wutar lantarki, wanda aka haɗa da inverter ta motar DC, wanda ake kira DC-Link ko DC support.Tun da inverter yana karɓar babban RMS da kololuwar bugun bugun jini daga DC-Link, yana haifar da babban ƙarfin bugun bugun jini akan DC-Link, yana mai da wahalar jurewa mai inverter.Sabili da haka, ana buƙatar capacitor na DC-Link don ɗaukar babban bugun jini na yanzu daga DC-Link kuma ya hana babban juzu'in wutar lantarki na inverter yana cikin kewayon yarda;a daya bangaren kuma, yana hana inverters samun tasiri ta hanyar karfin wutar lantarki da na wucin gadi a kan DC-Link.

Zane-zane na amfani da karfin DC-Link capacitors a cikin sabon makamashi (ciki har da samar da wutar lantarki da samar da wutar lantarki) da sabbin tsarin tukin abin hawa makamashi ana nuna su a cikin Figures 1 da 2.

Hoto na 1 yana nuna nau'in wutar lantarki mai jujjuyawar wutar lantarki, inda C1 shine DC-Link (yawanci haɗawa zuwa module), C2 shine shawar IGBT, C3 shine LC tace (gefen net), da C4 rotor gefen DV/DT tacewa.Hoto 2 yana nuna fasahar kewaya wutar lantarki ta PV, inda C1 shine tace DC, C2 shine tacewa EMI, C4 shine DC-Link, C6 shine tacewa LC (gefen grid), C3 shine tace DC, kuma C5 shine IPM/IGBT sha.Hoto na 3 yana nuna babban tsarin tuƙi a cikin sabon tsarin abin hawa makamashi, inda C3 shine DC-Link kuma C4 shine IGBT capacitor sha.

A cikin sababbin aikace-aikacen makamashi da aka ambata a sama, DC-Link capacitors, a matsayin na'ura mai mahimmanci, ana buƙata don babban aminci da tsawon rai a cikin tsarin samar da wutar lantarki, tsarin samar da wutar lantarki na photovoltaic da sabon tsarin motocin makamashi, don haka zaɓin su yana da mahimmanci.Mai zuwa shine kwatancen halayen masu ƙarfin fim da masu ƙarfin lantarki da kuma nazarin su a aikace-aikacen capacitor na DC-Link.

1.Feature kwatanta

1.1 Fim capacitors

An fara gabatar da ƙa'idar fasahar ƙarfe ta fim: isasshe siraɗin ƙarfe na bakin ciki yana vaporized a saman siraren kafofin watsa labarai na fim.A gaban wani lahani a cikin matsakaici, Layer yana iya ƙafewa don haka ya keɓe wuri mara kyau don kariya, al'amari da aka sani da warkar da kai.

Hoto na 4 yana nuna ka'idar suturar ƙarfe, inda aka riga an riga an riga an riga an riga an riga an yi amfani da kafofin watsa labarai na fim na bakin ciki (corona na in ba haka ba) kafin vaporization don ƙwayoyin ƙarfe su manne da shi.The karfe ne evaporated ta hanyar narkar da a high zafin jiki a karkashin injin (1400 ℃ zuwa 1600 ℃ ga aluminum da 400 ℃ zuwa 600 ℃ na zinc), da kuma karfe tururi condensed a saman fim din a lõkacin da ta hadu da sanyaya film (fim sanyaya zafin jiki). -25 ℃ zuwa -35 ℃), don haka forming wani karfe shafi.Haɓaka fasahar ƙarfe na ƙarfe ya inganta ƙarfin dielectric na fim ɗin dielectric a kowace naúrar kauri, kuma ƙirar capacitor don bugun jini ko fitarwa aikace-aikacen busassun fasaha na iya isa 500V / µm, kuma ƙirar capacitor don aikace-aikacen tacewa na DC na iya isa 250V. /µm.DC-Link capacitor na na karshen ne, kuma bisa ga IEC61071 ikon lantarki aikace-aikace capacitor iya jure mafi tsanani irin ƙarfin lantarki girgiza, kuma zai iya kai sau 2 da rated irin ƙarfin lantarki.

Don haka, mai amfani kawai yana buƙatar yin la'akari da ƙimar ƙarfin aiki da ake buƙata don ƙirar su.Ƙarfafa fina-finai masu ƙarfin ƙarfe suna da ƙananan ESR, wanda ke ba su damar yin tsayayya da manyan igiyoyin ruwa;ƙananan ESL ya sadu da ƙananan ƙirar ƙirar inductance na inverters kuma yana rage tasirin oscillation a sauya mitoci.

Ingancin dielectric fim ɗin, ingancin murfin ƙarfe, ƙirar capacitor da tsarin masana'anta sun ƙayyade halayen warkar da kai na masu ƙarfin ƙarfe.Dielectric fim ɗin da aka yi amfani da shi don capacitors na DC-Link da aka ƙera galibi fim ɗin OPP ne.

Za a buga abin da ke cikin babi na 1.2 a labarin mako mai zuwa.