N'izu a, anyị na-aga nyochaa ojiji nke ihe nkiri capacitors kama electrolytic capacitors na DC-njikọ capacitors.A ga-ekewa akụkọ a ụzọ abụọ.

Site na mmepe nke ụlọ ọrụ ume ọhụrụ, teknụzụ na-agbanwe agbanwe na-ejikarị ya eme ihe, na DC-Link capacitors dị mkpa karịsịa dị ka otu n'ime isi ngwaọrụ maka nhọrọ.The DC-Link capacitors na DC nzacha n'ozuzu chọrọ nnukwu ikike, elu ugbu a nhazi na elu voltaji, wdg Site atụnyere àgwà nke film capacitors na electrolytic capacitors na nyochaa ndị metụtara ngwa, akwụkwọ a kwubiri na na sekit aghụghọ chọrọ elu arụ ọrụ voltaji, elu ripple ugbu a (Irms), ihe karịrị voltaji chọrọ, voltaji ntughari, elu inrush ugbu a (dV/dt) na ogologo ndụ.Site na mmepe nke teknụzụ mkpuchi ikuku metallized na teknụzụ capacitor ihe nkiri, ndị na-eme ihe nkiri ga-abụ ihe na-ewu ewu maka onye nrụpụta iji dochie ndị na-emepụta electrolytic n'ihe gbasara arụmọrụ na ọnụahịa n'ọdịnihu.

Site na iwebata amụma metụtara ume ọhụrụ na mmepe nke ụlọ ọrụ ume ọhụrụ na mba dị iche iche, mmepe nke ụlọ ọrụ ndị metụtara ya na mpaghara a ewetala ohere ọhụrụ.Na capacitors, dị ka ụlọ ọrụ ngwaahịa metụtara elu dị mkpa, enwetakwala ohere mmepe ọhụrụ.N'ime ume ọhụrụ na ụgbọ ala ume ọhụrụ, ndị na-emepụta ihe bụ ihe ndị bụ isi na njikwa ike, njikwa ike, ike inverter na DC-AC usoro ntụgharị nke na-ekpebi ndụ onye ntụgharị.Otú ọ dị, na inverter, a na-eji ike DC eme ihe dị ka isi iyi ike ntinye, nke ejikọrọ na inverter site na ụgbọ ala DC, nke a na-akpọ DC-Link ma ọ bụ nkwado DC.Ebe ọ bụ na inverter na-enweta RMS dị elu na ọnụ ọgụgụ kachasị elu site na DC-Link, ọ na-emepụta voltaji dị elu na DC-Link, na-eme ka o sie ike maka onye ntụgharị ahụ iguzogide.Ya mere, DC-Link capacitor dị mkpa ka etinyere elu pulse ugbu a site na DC-Link na-egbochi elu pulse voltaji mgbanwe nke inverter bụ n'ime nke a na-anabata;n'aka nke ọzọ, ọ na-egbochikwa ndị inverters na-emetụta voltaji overshoot na transient over-voltage na DC-Link.

Eserese eserese nke iji DC-Link capacitors na ike ọhụrụ (gụnyere ike ikuku na ọgbọ ọkụ fotovoltaic) yana sistemụ ịnya ụgbọ ala ike ọhụrụ ka egosiri na Figure 1 na 2.

Ọnụọgụ 1 na-egosi topology nke ikuku ikuku, ebe C1 bụ DC-Link (na-ejikọta ya na modul), C2 bụ absorption IGBT, C3 bụ LC filter (akụkụ net), na C4 rotor n'akụkụ DV/DT nzacha.Ọnụọgụ 2 na-egosi teknụzụ sekit ihe ntụgharị ike PV, ebe C1 bụ nzacha DC, C2 bụ EMI nzacha, C4 bụ DC-Link, C6 bụ LC nzacha (akụkụ grid), C3 bụ DC nzacha, na C5 bụ IPM/IGBT absorption.Ọnụọgụ 3 na-egosi usoro ịkwọ ụgbọala bụ isi na usoro ụgbọ ala ike ọhụrụ, ebe C3 bụ DC-Link na C4 bụ IGBT absorption capacitor.

N'ime ngwa ike ọhụrụ a kpọtụrụ aha n'elu, DC-Link capacitors, dị ka ngwaọrụ dị mkpa, achọrọ maka ntụkwasị obi dị elu na ogologo ndụ na usoro ikuku ike ikuku, usoro mmepụta fotovoltaic na usoro ụgbọ ala ike ọhụrụ, ya mere nhọrọ ha dị mkpa karịsịa.Ihe na-esonụ bụ ntụnyere njirimara nke ndị na-emepụta ihe nkiri na ndị na-emepụta electrolytic na nyocha ha na ngwa DC-Link capacitor.

1.Feature ntụnyere

1.1 Ihe nkiri capacitors

A na-ebu ụzọ weba ụkpụrụ nke teknụzụ metallization nke ihe nkiri: a na-ekpochapụ akwa igwe dị mkpa nke ọma n'elu mgbasa ozi ihe nkiri dị mkpa.N'ebe enwere ntụpọ dị na ọkara, oyi akwa nwere ike ịpụpụ ma si otú a kewapụ ntụpọ ntụpọ maka nchebe, ihe a maara dị ka ọgwụgwọ onwe onye.

Onyonyo 4 na-egosi ụkpụrụ nke metallization mkpuchi, ebe mkpa film media pretreated (corona nke uzọ ọzọ) tupu vaporization nke metal ụmụ irighiri nwere ike rube isi na ya.The metal a evaporated site igbari na elu okpomọkụ n'okpuru agụụ (1400 ℃ ka 1600 ℃ maka aluminum na 400 ℃ ka 600 ℃ maka zinc), na metal vepo condensed n'elu nke ihe nkiri mgbe ọ zutere mma film (ihe nkiri jụrụ oyi okpomọkụ). -25 ℃ ka -35 ℃), si otú a na-akpụ a metal mkpuchi.The mmepe nke metallization technology emewo ka dielectric ike nke film dielectric kwa unit ọkpụrụkpụ, na imewe nke capacitor maka usu ma ọ bụ ihapu ngwa nke akọrọ technology nwere ike iru 500V / µm, na imewe nke capacitor maka DC nzacha ngwa nwere ike iru 250V. /µm.DC-Link capacitor bụ nke ikpeazụ, na dị ka IEC61071 maka ike ngwá electronic ngwa capacitor nwere ike idi ihe siri ike voltaji ujo, na ike iru 2 ugboro voltaji gosiri.

Ya mere, onye ọrụ naanị kwesịrị ịtụle voltaji na-arụ ọrụ nke achọrọ maka imewe ha.Ndị na-emepụta ihe nkiri metallized nwere ESR dị ala, nke na-enye ha ohere iguzogide mmiri iyi ka ukwuu;ESL dị ala na-egbo mkpa imewe inductance dị ala nke ndị inverters ma na-ebelata mmetụta oscillation na ngbanwe ugboro ugboro.

Ịdị mma nke ihe nkiri dielectric, àgwà nke mkpuchi metallization, mmepụta capacitor na usoro mmepụta ihe na-ekpebi njirimara ọgwụgwọ onwe onye nke ndị na-emepụta ihe.Ihe nkiri dielectric eji maka DC-Link capacitors arụpụtara na-abụkarị ihe nkiri OPP.

A ga-ebipụta ọdịnaya nke isi 1.2 n'isiokwu na-abịa.