Ngokunyuka kobunzima bamandla, ukudinwa kwezixhobo kunye nokungcoliseka komoya, iTshayina iseke izithuthi zamandla amatsha njengeshishini elikhulayo elinobuchule.Njengenxalenye ebalulekileyo yezithuthi zombane, iitshaja zezithuthi zinexabiso lophando lwethiyori kunye nexabiso elibalulekileyo lesicelo sobunjineli.IKHIWANE.I-1 ibonisa umzobo webhloko yesakhiwo setshaja yesithuthi kunye nokudibanisa i-STAGE AC / DC yangaphambili kunye nesigaba sangasemva kwe-DC / DC.
Xa ishaja yemoto ixhunyiwe kwigridi yamandla, iya kuvelisa i-harmonics ethile, ingcolise igridi yamandla, kwaye ichaphazele ukuzinza kwezixhobo zombane.Ukuze kuncitshiswe inani lee-harmonics, i-International Electrotechnical Commission iphuhlise umgangatho we-harmonic limit standard iec61000-3-2 yezixhobo zombane, kwaye i-China nayo yakhupha umgangatho we-NATIONAL GB/T17625.Ukuze kuthotyelwe le migangatho ingentla, iitshaja ezisebhodini kufuneka zingene kwi-power factor correction (PFC).I-PFC AC/DC converter inika amandla kwi-DC/DC system yangasemva kwelinye icala, kunye noncedo lombane kwelinye icala.Uyilo lwe-PFC AC / DC converter luchaphazela ngokuthe ngqo ukusebenza kweshaja yemoto.
Ngokujonga umthamo kunye nee-harmonics zeetshaja zezithuthi zombane ezicocekileyo zineemfuno ezinzima, olu luyilo lusebenzisa iteknoloji yokulungiswa kwamandla asebenzayo (APFC).I-APFC ineentlobo ngeentlobo ze-topology.I-Boost topology ineenzuzo zesekethe yokuqhuba elula, ixabiso eliphezulu le-PF kunye ne-chip ekhethekileyo yokulawula, ngoko ke isiphaluka esiphambili se-Boost topology sikhethiwe.Ukuqwalasela iindlela ezahlukeneyo zolawulo olusisiseko, i-avareji yendlela yokulawula yangoku kunye nenzuzo yokuphazamiseka kwe-harmonic ephantsi, ukungabi novelwano kwingxolo kunye nokutshintsha okusisigxina okukhethiweyo.
Eli nqaku ngokujonga amandla e-2 kW yonke itshaja yemoto yombane, ngokuqwalasela umxholo we-harmonic, umthamo kunye neemfuno zoyilo loyilo lwe-anti-jamming, uphando oluphambili lwe-PFC AC / DC converter, luqulethe inkqubo yesekethe kunye noyilo lwesekethe yolawulo, kunye ngokwesiseko sophononongo, kuphononongo lokulinganisa inkqubo kunye neemvavanyo zovavanyo qinisekisa
I-2 PFC AC / DC isiguquleli soyilo oluphambili lwesekethe
Isiphaluka esiphambili se-PFC AC / DC converter siqulunqwe yi-capacitor yokucoca imveliso, isixhobo sokutshintsha, i-inductor yokunyusa kunye namanye amacandelo, kwaye iiparitha zayo zenzelwe ngolu hlobo lulandelayo.
2.1 Imveliso yokucoca amandla
I-capacitor yokucoca imveliso inokucoca ukuphuma kwe-voltage ripple ebangelwa sisenzo sokutshintsha kwaye igcine i-voltage ephumayo kuluhlu oluthile.Isixhobo esikhethiweyo kufuneka siqonde ngcono le misebenzi mibini ingentla.
Isiphaluka solawulo sithatha isakhiwo esivaliweyo esiphindwe kabini: i-loop yangaphandle yi-voltage loop kunye ne-loop yangaphakathi yi-loop yangoku.I-loop yangoku ilawula i-input current ye-circuit engundoqo kwaye ilandelelanisa ireferensi yangoku ukuphumeza ukulungiswa kwezinto zamandla.Umbane ophumayo we-voltage loop kunye ne-voltage yereferensi yemveliso ithelekiswa ne-voltage yempazamo yeamplifier.Umqondiso wokuphuma, i-voltage ye-feedforward kunye ne-voltage yegalelo ibalwa ngumphindisi ukufumana i-reference reference yangoku ye-loop yangoku.Ngokulungelelanisa i-loop yangoku, umqondiso wokuqhuba wetyhubhu yokutshintsha kwesekethe engundoqo iveliswa ukufezekisa ulungiso lwamandla ombane wenkqubo kunye nokuphuma kombane ozinzileyo weDC.Isiphindaphindi sisetyenziswa ikakhulu uphinda-phindo lomqondiso.Apha, eli phepha ligxile kuyilo lwe-voltage loop kunye nelophu yangoku.
Ixesha lokuposa: Jun-20-2022