A cikin haɓaka na'urar caji mai ƙarfin 6.6 kW (OBC), abubuwan da ke cikin maganadisu (inductors, transformers) ba wai kawai manyan masu ba da gudummawa ga girma da nauyi ba ne, har ma da mahimman abubuwa wajen tantance inganci da aikin EMI. Dangane da sabbin abubuwan da suka faru a masana'antu da gogewa ta aiki, mun taƙaita waɗannan shawarwari masu amfani don zaɓar abubuwan da ke cikin maganadisu na OBC, suna taimaka muku cimma daidaito mafi kyau tsakanin "aiki, girma, da farashi."
SHAWARA TA 1.Zaɓin PFC Inductor — "Ya fi girma fiye da ƙarami," Yana mai da hankali kan DC Bias
A cikin ƙirar ƙarfin lantarki mai ƙarfi na 6.6 kW, matsalar da aka fi samu tare da inductor na PFC ba "rashin isasshen induction" bane amma "jimlar ruwa a ƙarƙashin babban wutar lantarki".
* Mnemonic Mai Amfani: "ku kula da lanƙwasa, ba ƙimar da ba ta da suna ba."
* Yawancin inductors suna nuna babban inductance a zafin ɗaki (25°C), amma idan aka yi amfani da wutar lantarki ta DC ta 30A-50A, inductance ɗinsu na iya raguwa da fiye da 50%.
*Lokacin zabar wani abu, koyaushe a nemi lanƙwasa LI (inductance-current) daga mai samar da shi. Tabbatar cewa inductance ya kasance sama da kashi 80% na ƙimar da ake buƙata a mafi girman wutar lantarki (misali, 55A).
* Zaɓin Kayan Aiki:
Biyan Mafi Kyau: Zaɓi tsakiyar foda mai maganadisu na Sendust ko iron-nickel-molybdenum, waɗanda ke nuna juriya mai ƙarfi ga jikewa, ƙarar zafin jiki mai ƙarancin yawa, amma akan farashi mai girma.
Neman ingantaccen farashi: Zaɓi ferrite mai daidaitaccen tsarin sarrafa gibin iska don ƙarancin farashi, amma ku kula da asarar wutar lantarki (tasirin gefen) a gibin iska. Ana ba da shawarar amfani da winding mai yawa ko waya ta Litz don rage asara.
Shawara ta 2:Mai Canzawa na LLC - Amfani da "Leakage Inductance" maimakon "Resonant Inductance"
Wannan ita ce dabarar rage farashi mafi girma a halin yanzu don 6.6kW OBC (musamman ga mai canza sautin CLLC na baya).
*Aiki mai amfani:
*Kada a sayi inductor mai amsawa daban, amma a yi amfani da fasahar zamani wajen ƙara yawan fitar da wutar lantarki ta hanyar keɓance tsarin transformer ɗin (kamar daidaita nisan da ke tsakanin naɗewar farko da ta biyu, ta amfani da kwarangwal da aka raba).
*Shawara: Yi amfani da wannan hanyar fitar da ruwa a matsayin hanyar fitar da ruwa (L_r) na ramin fitar da ruwa.
*Kudin Shiga:
*Ƙara: An rage adadin ƙwanƙolin maganadisu masu zaman kansu, kuma ana iya rage girman da fiye da kashi 20%.
*Kuɗi: Cire ƙwanƙolin maganadisu ɗaya da kuma murɗawa yana rage farashin BOM.
*Ragewar Zafi: Na'urorin canza wutar lantarki galibi suna da yanayi mafi kyau na wargaza zafi (kamar rufewa da kuma hulɗa da faranti masu sanyaya ruwa), wanda hakan ke sa su sauƙin wargaza zafi fiye da ƙananan inductor masu zaman kansu.
Shawara ta 3:Tsarin Zafin Jiki - "Juriyar Zafin Jiki" Ya Fi Muhimmanci Fiye da "Hawan Zafin Jiki"
A lokacin gwajin samfurin, za ka iya ganin cewa saman inductor ɗin yana da zafi sosai (>100 ℃). Shin hakan al'ada ce?
*Kwarewar yin hukunci:
*Kada ka auna zafin saman kawai, ka kalli zafin wurin zafi na ciki.
*Dabarar lissafi: T {hotspot}=T {surface}+(R {th} sau P {rashin nasara})
*Shawara: Lokacin zaɓa, tambayi mai samar da kayayyaki don ma'aunin juriyar zafi (R_ {th}). Idan ba za a iya samunsa ba, ana iya aiki da shi a cikakken kaya har sai an daidaita yanayin zafi sannan a duba shi da na'urar daukar hoto ta zafi.
*Ma'aunin wargaza zafi:
* Rufewa: Amfani da manne mai amfani da zafi don canja wurin zafi zuwa harsashin waje (farantin ƙasa) a halin yanzu shine hanyar watsa zafi mafi mahimmanci ga OBC.
*Shiri: Sanya inductor na PFC tare da mafi girman samar da zafi kusa da farantin da ke sanyaya ruwa ko bututun watsa zafi.
Shawara ta 4:Magance ƙalubalen da ke yawan faruwa akai-akai - Kula da "tasirin fata" da tsarin lanƙwasawa
Yayin da yawan sauyawar OBC ke ƙaruwa (PFC ya kai 40kHz-100kHz, LLC ya fi girma), asarar AC (I ^ 2R_ {ac}) galibi tana da haɗari fiye da asarar DC.
* Ƙwarewar zaɓar na'urar jujjuya waya:
*Ƙarancin wutar lantarki mai ƙarfin mita (PFC): Ana ba da shawarar amfani da waya mai faɗi ta jan ƙarfe don naɗewa a tsaye. Yawan cika layukan da aka yi da layukan da aka yi da tsayi yana da yawa, kuma tasirin fata a cikin tsakiyar mita (goma na kHz) ya fi na layukan da'ira kyau.
*Mai yawan mita (transformer/resonant inductor): Dole ne a yi amfani da wayar Litz. An saka wayar Leeds daga zare da yawa na waya mai siriri sosai, wanda zai iya ƙara girman saman mai jagora sosai kuma ya yi tsayayya da "tasirin fata" na kwararar ruwa mai yawan mita.
* Jagorar Gujewa Tarukan: Idan aka yi amfani da waya ɗaya mai kauri tagulla don kunna inductor mai yawan mita don adana lokaci, hauhawar zafin da aka auna na iya zama sama da 30 ℃ sama da ƙimar da aka ƙididdige, wanda ke haifar da tsufa na rufin rufi ko ma gajeriyar da'ira.
Barka da zuwa raba mana ra'ayinka!
Lokacin Saƙo: Disamba-18-2025