Mu itegurwa rya sharija ya 6.6 kW iri mu bwato (OBC), ibice bya rukuruzi (inductors, transformers) ntabwo ari ingenzi gusa mu kugira ingano n'uburemere, ahubwo ni n'ibintu by'ingenzi mu kugena imikorere myiza n'imikorere ya EMI. Dushingiye ku miterere igezweho y'inganda n'uburambe bufatika, twatanze inama zikurikira z'ingirakamaro zo guhitamo ibice bya rukuruzi bya OBC, bigufasha kugera ku buringanire bwiza hagati y' "imikorere, ingano, n'igiciro."
INAMA 1.Guhitamo PFC Inductor — “Biruta Binini,” Kwibanda ku Guhitamo DC
Mu gishushanyo mbonera cy’imbaraga nyinshi cya 6.6 kW, ikibazo gikunze kugaragara kuri PFC inductor si "inductance idahagije" ahubwo ni "kuzura kw'amashanyarazi munsi y'umuyoboro mwinshi."
* Isuzuma ry'imikorere: "witondere umurongo ugororotse, ntabwo wite ku gaciro k'izina.".
* Inductor nyinshi zigaragaza inductance nyinshi mu bushyuhe bw'icyumba (25°C), ariko iyo zihuye n'umuvuduko wa DC bias wa 30A-50A, inductance yazo ishobora kugabanukaho ibirenze 50%.
*Mu gihe uhitamo igice, buri gihe saba umuyoboro wa LI (inductance-current) ku mutanga. Menya neza ko inductance iguma hejuru ya 80% by'agaciro gasabwa ku muyoboro wawe w'amashanyarazi (urugero, 55A).
* Guhitamo ibikoresho:
Gukurikirana Ultimate: Hitamo Sendust cyangwa iron-nickel-molybdenum magnetic powder cores, zigaragaza ubudahangarwa bukomeye bwo gutwita, ubushyuhe buke, ariko ku giciro cyo hejuru.
Guharanira ko ikiguzi cyayo cyaba cyiza: Hitamo ferrite ifite uburyo bwo kugenzura neza icyuho cy’umwuka ku giciro gito, ariko wibuke ko nta gihombo cy’umuyoboro w’amashanyarazi (edge effects) kiri ku cyuho cy’umwuka. Ni byiza gukoresha winding ya multi-strand cyangwa Litz wire kugira ngo ugabanye igihombo.
Inama ya 2:Transformer ya LLC – Gukoresha “Leakage Inductance” aho gukoresha “Resonant Inductance”
Ubu ni bwo buryo bukoreshwa cyane mu kugabanya ikiguzi kuri 6.6kW OBC (cyane cyane kuri converter ya resonant ya CLLC yo mu cyiciro cy'inyuma).
* Umurimo ufatika:
*Ntukagure inductor ihindura imiterere y'imashini ihindura imiterere y'imashini ihindura imiterere y'imashini (nk'uko uhindura intera iri hagati y'impande zombi n'izombi, ukoresheje uduce duto).
*Inama: Koresha iyi inductance yo kuva nk'inductance ya resonant (L_r) y'umwobo wa resonant.
*Inyungu:
*Ubunini: Umubare w'imirongo ya rukuruzi yigenga waragabanutse, kandi ubunini bushobora kugabanukaho ibirenze 20%.
*Igiciro: Gukuraho inkingi imwe ya rukuruzi no kuyizunguza bigabanya ikiguzi cya BOM.
*Gusesa ubushyuhe: Transformateurs akenshi zigira uburyo bwiza bwo gusakaza ubushyuhe (nk'ifungwa ry'ibice bikonjeshejwe n'amazi), bigatuma byoroha gusesa ubushyuhe kurusha utumashini duto twigenga.
Inama ya 3:Igishushanyo mbonera cy'ubushyuhe – “Kurwanya ubushyuhe” ni ingenzi cyane kuruta “Kuzamuka k'ubushyuhe”
Mu gihe cyo gupima imiterere y'imashini, ushobora gusanga ubuso bw'imashini ishyushye cyane (>100 ℃). Ese ibi ni ibisanzwe?
*Ubuhanga mu guca imanza:
*Ntupime ubushyuhe bw'ubuso gusa, reba ubushyuhe bw'imbere mu kirere.
*Ifishi yo kubara: T {hotspot}=T {ubuso}+(R {th} inshuro P {igihombo})
*Inama: Mu gihe uhitamo, baza umutanga serivisi niba afite ubushobozi bwo kwirinda ubushyuhe (R_ {th}). Niba idashoboye kuboneka, ishobora gukoreshwa yuzuye kugeza igihe ubushyuhe buhagaze neza kandi igasuzumwa hakoreshejwe ishusho y'ubushyuhe.
*Ingamba zo gukwirakwiza ubushyuhe:
*Gufunga: Gukoresha kole itwara ubushyuhe kugira ngo wohereze ubushyuhe ku gishishwa cyo hanze (igice cyo hasi) ni bwo buryo bukoreshwa cyane mu gukwirakwiza ubushyuhe kuri OBC.
*Imiterere: Shyira inductor ya PFC ifite ubushyuhe bwinshi cyane hafi y'isahani ikonjeshejwe n'amazi cyangwa umuyoboro ukwirakwiza ubushyuhe.
Inama ya 4:Guhangana n'ibibazo bikunze kugaragara kenshi - Witondere "ingaruka z'uruhu" n'uburyo ruzunguruka
Uko inshuro zo guhindura OBC ziyongera (PFC igera kuri 40kHz-100kHz, LLC iba iri hejuru), igihombo cya AC (I ^ 2R_ {ac}) akenshi kiba cyica kurusha igihombo cya DC.
*Ubuhanga bwo guhitamo insinga zo gufunga:
*Umuriro wo hasi w’amashanyarazi (PFC): Ni byiza gukoresha insinga y’umuringa igororotse mu kuzunguruka ihagaze. Igipimo cyo kuzuza imirongo igororotse ni kinini, kandi ingaruka z’uruhu mu gice cyo hagati cy’umuraba (makumi ya kHz) ni nziza kuruta iz’imirongo yererana.
*Umuvuduko wo hejuru (transformer/resonant inductor): Insinga ya Litz igomba gukoreshwa. Insinga ya Leeds iboshywe mu nsinga nyinshi zoroheje cyane zirinda ubushyuhe, zishobora kongera cyane ubuso bw'umuvuduko no kurwanya "ingaruka z'uruhu" z'imivuduko yo hejuru.
*Inzira yo kwirinda ingorane: Iyo insinga imwe y'umuringa ikomeye ikoreshejwe mu guhumeka inductor ifite frequency nyinshi kugira ngo izigame igihe, izamuka ry'ubushyuhe ryapimwe rishobora kuba riri hejuru ya 30 ℃ kuruta agaciro kabazwe, bigatuma insulation layer isaza cyangwa se ikaba yanakora ku buryo bugufi.
Murakaza neza kugira ngo musangize igitekerezo cyanyu!
Igihe cyo kohereza: Ukuboza 18-2025