Ngokubhebhetheka kwenkinga yamandla, ukuphela kwezinsiza kanye nokungcoliswa komoya, i-China isisungule izimoto zamandla amasha njengemboni enamasu asafufusa.Njengengxenye ebalulekile yezimoto zikagesi, amashaja ezimoto anakho kokubili ukubaluleka kocwaningo lwethiyori kanye nenani elibalulekile lesicelo sobunjiniyela.I-FIG.1 ibonisa umdwebo webhulokhi lesakhiwo seshaja yemoto enenhlanganisela ye-STAGE AC/DC yangaphambili nesiteji sangemuva se-DC/DC.
Uma ishaja yemoto ixhunywe kugridi yamandla, izokhiqiza ama-harmonics athile, ingcolise igridi yamandla, futhi ithinte ukuzinza kwempahla kagesi.Ukuze kukhawulwe inani lama-harmonics, i-International Electrotechnical Commission ithuthukise indinganiso yomkhawulo we-harmonic iec61000-3-2 yezinto zikagesi, futhi i-China yaphinde yakhipha i-NATIONAL standard GB/T17625.Ukuze uthobelane nalawa mazinga angenhla, amashaja angaphakathi ebhodini kufanele abhekane nokulungiswa kwesici samandla (PFC).Isiguquli se-PFC AC/DC sinikeza amandla kusistimu ye-DC/DC yangemuva ngakolunye uhlangothi, kanye nokunikezwa kwamandla okusiza ngakolunye uhlangothi.Idizayini ye-PFC AC/DC converter ithinta ngqo ukusebenza kweshaja yemoto.
Uma kubhekwa umthamo kanye nokuvumelana kwamashaja emoto kagesi ahlanzekile anezidingo ezinzima, lo mklamo usebenzisa ubuchwepheshe bokulungisa izinto ezisebenzayo (i-APFC).I-APFC inezinhlobonhlobo zama-topology.I-Boost topology inezinzuzo zesekethe yokushayela elula, inani eliphakeme le-PF kanye ne-chip ekhethekile yokulawula, ngakho-ke isifunda esiyinhloko se-Boost topology siyakhethwa.Uma kucatshangelwa izindlela ezihlukahlukene zokulawula eziyisisekelo, indlela yokulawula yamanje eyisilinganiso enezinzuzo zokuhlanekezela okuphansi kwe-harmonic, ukungezwani emsindweni kanye nemvamisa yokushintsha ehleliwe ikhethiwe.
Lesi sihloko ngenxa yamandla eshaja yemoto kagesi engu-2 kW yonke, kucatshangelwa okuqukethwe kwe-harmonic, ivolumu kanye nezidingo zokuklama ukusebenza kwe-anti-jamming, ucwaningo olubalulekile lwe-PFC AC/DC converter, luqukethe uhlelo oluyinhloko lwesekethe kanye nomklamo wesekethe yokulawula, kanye ngesisekelo socwaningo, ocwaningweni lokulingisa uhlelo kanye nokuhlolwa kokuhlola qinisekisa
2 PFC AC/DC idizayini yokuguqulela eyinhloko yesekethe
Isekethe eyinhloko ye-PFC AC/DC converter yakhiwe nge-output filter capacitor, idivayisi yokushintsha, i-boost inductor nezinye izakhi, futhi imingcele yayo yakhelwe kanje.
2.1 Amandla okuhlunga okukhiphayo
I-capacitor yesihlungi ephumayo ingakwazi ukuhlunga i-voltage ripple ephumayo ebangelwa isenzo sokushintsha futhi igcine i-voltage ephumayo ebangeni elithile.Idivayisi ekhethiwe kufanele ibone kangcono imisebenzi emibili engenhla.
Isifunda sokulawula sithatha isakhiwo esivalekile esiphindwe kabili: iluphu yangaphandle iyiluphu ye-voltage futhi iluphu yangaphakathi iyiluphu yamanje.Iluphu yamanje ilawula okokufaka kwesekhethi eyinhloko futhi ilandelela ireferensi yamanje ukuze kuzuzwe ukulungiswa kwesici samandla.I-voltage ephumayo yeluphu ye-voltage kanye ne-voltage yereferensi yokuphumayo iqhathaniswa ne-voltage ye-amplifier yephutha.Isignali yokuphumayo, i-voltage ye-feedforward kanye ne-voltage yokufaka kubalwa yisiphindaphinda ukuze kutholwe inkomba yamanje yokufaka yeluphu yamanje.Ngokulungisa iluphu yamanje, isignali yokushayela yeshubhu yokushintsha isekethe eyinhloko ikhiqizwa ukuze kuzuzwe ukulungiswa kwesici samandla sesistimu futhi kukhishwe i-voltage ye-DC ezinzile.Isiphindaphinda sisetshenziswa kakhulu ekuphindaphindeni isignali.Lapha, leli phepha ligxile ekwakhiweni kwe-voltage loop kanye ne-loop yamanje.
Isikhathi sokuthumela: Jun-20-2022