800V Ukushaja “Izisekelo Zokushaja”
Le ndatshana ikhuluma kakhulu ngezidingo zokuqala zenqwaba yokushaja engu-800V, qala ngokubheka umgomo wokushaja: lapho ikhanda lesibhamu esishajayo lixhunywe ekugcineni kwemoto, inqwaba yokushaja izohlinzeka ① isisetshenziswa samandla aphansi we-DC emotweni. ekugcineni, ukwenza kusebenze i-BMS eyakhelwe ngaphakathi (Isistimu Yokulawula Ibhethri) yemoto kagesi, ngemuva kokwenza kusebenze, ② ukuphela kwemoto kuzoba exhunywe esiphethweni senqwaba ukushintshanisa amapharamitha wokushaja ayisisekelo, njengamandla esidingo sokushaja esiphezulu sokuphela kwemoto kanye namandla okukhipha aphezulu okuphela kwenqwaba, futhi izinhlangothi zombili zizofanelana ngendlela efanele.
Ngemuva kokumatanisa kahle, i-BMS (Battery Management System) ekugcineni kwemoto izothumela imininingwane yesidingo samandla enqwabeni yokushaja, futhi inqwaba yokushaja izolungisa amandla ayo okukhipha amandla kanye neyamanje ngokwalolu lwazi, bese iqala ngokusemthethweni ukushaja imoto, okuyinqwaba. umgomo oyisisekelo woxhumano olushajayo, futhi kuyadingeka ukuthi sizijwayeze kuqala.
800V ukushaja: "Boost voltage noma yamanje"
Ngokombono, sifuna ukunikeza amandla okushaja ukuze sifinyeze isikhathi sokushaja,ngokuvamile kunezindlela ezimbili: noma ukhuphula ibhethri noma ukhuphule i-voltage; ngokusho kwe-W=Pt, uma amandla okushaja ephindwe kabili, khona-ke isikhathi sokushaja sizoncishiswa ngokwemvelo; ngokusho kwe-P = UI, uma i-voltage noma i-current iphindwe kabili, amandla okushaja angaphinda aphindwe kabili, futhi lokhu kuye kwashiwo ngokuphindaphindiwe, okubuye kubhekwe njengomqondo ovamile.
Uma i-current iphakeme, kuzoba nezinkinga ezingu-2, ukuphakama kwamanje, ikhebula elithwala amandla lamanje elikhudlwana futhi elikhulu liyadingeka, okuzokwandisa ububanzi nesisindo socingo, okuzokwandisa izindleko, futhi ngesikhathi esifanayo, akulula ukuthi abasebenzi basebenze; ngaphezu kwalokho, ngokuya nge-Q=I²Rt, uma i-current iphakeme, ukulahleka kwamandla kukhulu, futhi ukulahleka kubonakala ngendlela yokushisa, okungeza ingcindezi ekulawuleni okushisayo, ngakho-ke akungabazeki ukuthi ukwanda amandla okushaja awafiseleki ukubona ukwanda kwamandla okushaja ngokukhuphula amanje ngokuqhubekayo.ukukhuphuka kwamandla okushaja akufiseleki, noma ukushaja noma kumasistimu okushayela emotweni.
Uma kuqhathaniswa nokushaja okusheshayo kwamanje, ukushaja okunamandla kagesi aphezulu kukhiqiza ukushisa okuncane kanye nokulahlekelwa okuphansi, okwamanje, cishe wonke amabhizinisi ezimoto ajwayelekile asebenzise umzila wamandla kagesi akhuphukayo, endabeni yokushaja okushesha kwamandla kagesi, ngokwethiyori, isikhathi sokushaja. ingafushaniswa ngo-50%, futhi isithuthukisi sikagesi singadonswa kalula sinyuse amandla okushaja ukusuka ku-120KW kuya ku-480KW.
Ukushaja okungu-800V: “I-Voltge ne-current ihambisana nomthelela we-thermal”.
Kodwa kungakhathaliseki ukuthi uphakamisa i-voltage noma i-current, okokuqala, njengoba amandla akho okushaja ekhula, ukushisa kwakho kuzovela, kodwa ukuphakamisa i-voltage kanye nokubonakaliswa kokushisa akufani, ngokushesha omunye umthelela ebhethri futhi kancane xaxa, a kuqhathaniswa kancane kodwa ukushisa kufihlwe sobala umkhawulo ongaphezulu futhi osobala kakhudlwana. Kodwa okokuqala kungcono uma kuqhathaniswa.
Njengoba i-current ku-conductor ngokusebenzisa ukumelana okuphansi, inyusa indlela ye-voltage inciphisa usayizi wekhebula elidingekayo, ikhipha ukushisa okuncane, futhi ithuthukisa yamanje ngesikhathi esifanayo, indawo yamanje ethwala i-cross-sectional yokwanda iholela ekukhulisweni okukhulu. isisindo sekhebula lobubanzi, kuyilapho ngesikhathi sokushaja sokushisa okude kuzokhula kancane kancane, kuvaleke kakhulu, le ndlela yebhethri iyingozi enkulu.
Ukushaja okungu-800V: “Ukushaja inqwaba yezinselelo eziqondile”
Ukushaja okusheshayo kwe-800V nakho kunezidingo ezihlukile ekugcineni kwenqwaba:
Uma ubheka izinga lomzimba, njengoba i-voltage ikhuphuka, idizayini yosayizi wedivayisi efanele nakanjani izokhula, njenge-IEC60664 izinga lokungcoliswa 2 lempahla yeqembu 1 ibanga ledivayisi yamandla kagesi aphezulu liyadingeka ukusuka ku-2mm kuya ku-4mm, ukufakwa okufanayo okufanayo izidingo zokumelana zizokhula, ibanga elicishe libe yi-creepage kanye nezidingo zokufakwa kwe-insulation ziyadingeka ukuthi zande nge-factor of two, ezidinga i-voltage ephakeme ekuklanyeni kwangaphambilini.
Lokhu kudinga idizayini yesistimu kagesi yangaphambilini ukuze idizayine kabusha usayizi wamadivayisi afanelekile, okuhlanganisa izixhumi, imigqa yethusi, amalunga, njll., ngaphezu kokukhuphuka kwamandla kagesi kuzoholela ezimfuneko eziphakeme zokucisha i-arc, isidingo samanye amadivayisi. njengamafuse, amabhokisi okushintshanisa, izixhumi, njll., ukuze kuthuthukiswe izidingo, lezi zidingo ziyasebenza futhi ekwakhiweni kwemoto.
Isistimu yokushaja ene-voltage engu-800V, njengoba kushiwo ngenhla, idinga ukwandisa isistimu yokupholisa uketshezi esebenzayo yangaphandle, ukupholisa komoya okungokwesiko kokubili okusebenzayo nokupholisa okwenziwayo akukwazi ukuhlangabezana nezidingo zolayini wesibhamu senqwaba eshajayo ukuya ekugcineni kwemoto eshisayo. ukuphathwa nakho kufuna kakhulu kunangaphambili, futhi le ngxenye yezinga lokushisa lesistimu yehliswa futhi ilawulwe kanjani kusukela kuleveli yedivayisi kanye nezinga lesistimu isikhathi esilandelayo sokuthuthukisa nokuxazulula inkinga yephuzu lokubuka;
ngaphezu kwalokho, le ngxenye yokushisa akuyona nje ukushisa okuvela ekushajeni ngokweqile, kodwa futhi nokushisa okuvela ekushajeni, okungeyona ingxenye yodwa yesistimu, kodwa futhi nokushisa okuvela ekushajeni. Akukhona nje ukushisa okulethwa ukushajwa ngokweqile, kodwa futhi nokushisa okulethwa amadivaysi amandla emvamisa ephezulu, ngakho-ke indlela yokwenza ukuqapha kwesikhathi sangempela nokuzinza, okusebenzayo, nokuphephile ukususa ukushisa kubaluleke kakhulu, okungagcini nje kuphela ukuphumelela kwezinto ezibonakalayo kodwa nokutholwa kwesistimu, njengezinga lokushisa lokushaja ngesikhathi sangempela kanye nokuqapha okusebenzayo.
Okwamanje emakethe DC ukushaja inqwaba okukhipha voltage kuyinto 400V, futhi ayikwazi ngqo 800V amandla ibhethri ukushaja, ngakho udinga umfutho okwengeziwe imikhiqizo DCDC kuthanda 400V voltage ukuze 800V, bese ishaja ibhethri, okudinga amandla aphezulu high-frequency ukuguqulwa, ukusetshenziswa kwe-silicon carbide ukufaka esikhundleni se-module ye-IGBT yendabuko kuwukukhetha okujwayelekile kwendlela, nakuba i-silicon carbide module ingakhuphula amandla okukhipha inqwaba yokushaja, kodwa futhi nokwandisa amandla okukhipha inqwaba yokushaja. Nakuba amamojula e-silicon carbide angakhuphula amandla okukhipha inqwaba yokushaja futhi anciphise ukulahlekelwa, izindleko nazo zikhuphuka kakhulu, futhi izidingo ze-EMC ziphakeme.
Fingqa. Ukwenyuka kwamandla kagesi kuzoba ngeleveli yesistimu futhi ileveli yedivayisi idinga ukuthuthukiswa, ileveli yesistimu efaka isistimu yokuphatha okushisayo, isistimu yokuvikela ukushaja, njll., kanye neleveli yedivayisi efaka amanye amadivayisi kazibuthe namadivayisi amandla ukuze kuthuthukiswe.
Isikhathi sokuthumela: Jan-30-2024