Ibanga Elihambayo Lomklamo We-MCPCB Onamandla Aphezulu

Isingeniso Sezimfuneko Zokuphepha Ze-MCPCB Ephezulu Kagesi

Ezisetshenzisweni ze-MCPCB ezinamandla aphezulu, ukwakheka kwe-PCB yebanga lokuhamba kahle kanye nokwenza ngcono i-MCPCB yebanga lokufudumeza kubalulekile ukuqinisekisa ukuphepha nokuthembeka kukagesi. Ama-PCB e-Metal Core asebenza ngama-voltage aphezulu aletha izinselele ezihlukile lapho izikhala ezinganele zingaholela ekuqhekekeni kukagesi, ama-short circuits, ukuvuza kwamanje, kanye nokwehluleka kwangaphambi kwesikhathi.

Inhlanganisela yokuchithwa kwamandla aphezulu kanye nokucindezeleka kwamandla kagesi kudinga ukunakwa okuqinile kwemingcele yokuhlukanisa ugesi. Ukuqonda lezi zidingo kubalulekile kubaklami abasebenza ngamashayeli e-LED, iziguquli zamandla, izilawuli zezimoto, nezinye izinhlelo ezinamandla kagesi lapho ubuchwepheshe be-MCCBB buhlinzeka ngokuphatha okushisayo okuphakeme.

Okuyisisekelo Kokufakwa Kwamanzi Nebanga Le-Creepage ku-High Voltage MCPCB

Ibanga le-Insulation ku-MCPCB Design

Ibanga le-insulation lisho indlela emfushane kakhulu ehamba emoyeni noma into evalelayo phakathi kwezinto ezimbili ze-conductive ngamakhono ahlukene. Ekwakhiweni kwe-MCPCB yamandla kagesi aphezulu, leli banga kufanele libhekane nesisekelo sensimbi esingaphansi, esisebenza njengesisabalalisi sokushisa kanye nendawo engase isetshenziswe kagesi.

Ubukhulu besendlalelo se-dielectric bunquma ngqo ikhono lokufaka ugesi phakathi kwemigqa yesekethe yethusi kanye nesisekelo se-aluminium. Amandla e-dielectric ezinto ezibonakalayo, ngokuvamile alinganiswa nge-kV/mm, asungula ibanga elincane lokufaka ugesi elidingekayo ku-voltage yokusebenza ethile.

Izidingo zebanga le-Creepage

Ibanga le-Creepage limelela indlela emfishane endaweni yezinto ezivikelayo phakathi kwamakhondaktha amabili. Ngokungafani nebanga le-insulation, i-creepage ilandela i-contour yendawo ye-PCB futhi isengozini yokungcoliswa, umswakama, nokuwohloka kwendawo.

Imiklamo ye-MCPCB yamandla kagesi aphezulu kufanele ibhekane nezici zemvelo ezinciphisa ukumelana nokufakwa kwendawo. Umzila we-creepage ungaba yinde kakhulu kunebanga eliqondile lokuhlukanisa ngenxa yomzila ongaphezulu kanye nemikhawulo yokubeka ingxenye.

I-IPC Amazinga kanye Namanani Ayisethenjwa

I-IPC-2221 ihlinzeka ngezidingo eziyisisekelo zesikhala ngokusekelwe kumazinga kagesi kanye nendawo yokusebenza. Kuzinhlelo zokusebenza ze-MCPCB zamandla kagesi aphezulu angaphezu kuka-300V, amabanga aphansi e-creepage ngokuvamile asukela ku-3.2mm kuya ku-12.7mm kuye ngesigaba sikagesi kanye nezinga lokungcola.

Ama-voltage asebenzayo aphakathi kuka-300-500V ngokuvamile adinga ubuncane be-creepage obungu-6.4mm endaweni ye-Pollution Degree 2. Njengoba amandla kagesi enyuka aze afike ku-1000V nangaphezulu, izidingo ze-creepage zingadlula u-12mm, okudinga ukuhlela ngokucophelela ukuze kugcinwe ubukhulu bebhodi elihlangene.

Ukucatshangwa Kwedizayini Ye-High Voltage MCPCB

Umthelela Wokukhetha Okubalulekile

Isendlalelo se-dielectric ku-MCPCB yamandla kagesi aphezulu kufanele sinikeze kokubili ukuqhutshwa kwe-thermal kanye nokuhlukaniswa kukagesi. Izinto ezijwayelekile zifaka ama-epoxy-based resins, amafilimu e-polyimide, nezinhlanganisela ezigcwaliswe nge-ceramic ezinama-dielectric constants asukela ku-3.5 kuya ku-4.5.

Izakhiwo ezibalulekile zezinhlelo zokusebenza ze-MCPCB zamandla kagesi aphezulu:

• Ukuqhuba kwe-thermal - Amanani aphakathi kuka-1-5 W/mK ibhalansi ukushabalalisa ukushisa nezidingo zokuhlukaniswa zikagesi.
• Amandla okuqhekeka kwe-Dielectric – Ubuncane obungu-3 kV/mm buqinisekisa ukufakwa kwemajini eyanele yokusebenza kwamandla kagesi aphezulu.
• Ubukhulu besakhiwo - Ama-microns ayi-100-200 ajwayelekile, anemiklamo yamandla kagesi aphezulu adinga ama-microns angama-300 noma ngaphezulu ukuze aphephe.

Ukukhethwa kwezinto kuthinta ngokuqondile ukusebenza okushisayo nokuphepha kukagesi kumadizayini we-MCPCB wamandla kagesi aphezulu.

Izinselele Zokucushwa Kwesakhiwo

Imiklamo ye-MCPCB yongqimba olulodwa yamandla kagesi aphezulu yenza kube lula ukukhiqiza kodwa igxilise yonke imizila yamandla kagesi aphezulu endaweni eyodwa, okwandisa izidingo zebanga lokukhuphuka. Ukucushwa kwe-MCPCB ezinhlangothi zombili kuvumela ukusatshalaliswa kwamandla kagesi kuzo zonke izendlalelo eziningi kodwa kwethula inkimbinkimbi ekugcineni ukwahlukanisa kumongo wensimbi.

Isisekelo se-aluminium ngokwaso singase sidinge ukubekwa phansi noma ukuhlukaniswa kuye ngokwakhiwa kwesistimu, okuthinta isu eliphelele le-insulation kanye nokusebenza ngempumelelo kokuphatha okushisayo.

Ukuphathwa Kokushisa kanye Nokuphepha kukagesi

Ukuchithwa kwamandla aphezulu ku-MCPCB yamandla kagesi aphezulu kudala ama-gradient ashisayo angehlisa izinga lokusebenza kokufakwayo ngokuhamba kwesikhathi. Amazinga okushisa aphakeme anciphisa amandla e-dielectric futhi asheshise ukuguga kwezinto zokuvikela.

I-metal base substrate isakaza kahle ukushisa kodwa idinga ukuhlukaniswa okwanele kumasekhethi abukhoma. Izinto zokusebenzelana ezishisayo phakathi kwezingxenye ne-MCPCB akumele zibeke engcupheni amabanga e-creepage kuyilapho igcina ukumelana nokushisa okuphansi ngaphansi kuka-0.5°C/W ukuze isebenze kahle.

Ukuthuthukiswa Kokwelapha Okungaphezulu

Isicelo semaski ye-Solder sinikeza ukufakwa okwengeziwe futhi kwandisa ibanga elisebenzayo le-creepage ngokuphakamisa izithiyo ezingaphezulu. Ukumboza okuhambisanayo kuthuthukisa futhi ukuvikeleka emazingeni omswakama kanye nokungcola ezindaweni ezinokhahlo.

Ku-MCPCB yamandla kagesi aphezulu esebenza ngaphezu kuka-500V, amasistimu okufakwa kwezingqimba ezintathu ahlanganisa i-base dielectric, imaski ye-solder, kanye ne-conformal coating kunikeza ukwethembeka okuphezulu. Ukukhethwa kokuqedwa kobuso kuthinta ukusebenza kwe-creepage yesikhathi eside, nge-ENIG nesiliva lokucwiliswa okunikeza ukumelana okungcono nokugqwala kune-HASL.

I-High Voltage MCPCB Izindlela Zokuklama kanye Namasu Okuthuthukisa

Ibala Izidingo Ezincane Zezikhala

Ibanga elincane lokubala ibanga liqala ngokuthola i-voltage ephezulu yokusebenza okuhlanganisa ama-transient kanye namamajini okuphepha. Phindaphinda i-voltage ye-RMS ngo-1.6 ukuze uhambisane namanani aphezulu e-AC, bese wengeza amaleveli okuvikela u-overvoltage.

Leli khasi liqondene ngqo nokufakwa kwe-MCPCB enamandla aphezulu, ukucwila, kanye nemikhawulo ye-substrate yokushisa. Ngesigaba esibanzi sebhodi, sebenzisa ukukhiqizwa kwebhodi lesekethe le-voltage ephezulu ; ngemikhawulo yokwenziwa kwe-metal core, qhathanisa umklamo nokukhiqizwa kwe-metal core PCB.

Khetha idigri yokungcola esuselwe endaweni yokusebenza: Idigri Yokungcoliswa 1 yezindawo ezivalekile, iDegree 2 ezosetshenziswa endlini evamile, iDegree 3 yendawo yezimboni. Sebenzisa amanani afanele esikhala ku-IPC-2221 Ithebula 6-1, bese wengeza u-20-30% wemajini yokuphepha ezinhlelweni ze-MCPCB zamandla kagesi aphezulu.

Imithetho yokudizayina ye-High Voltage MCPCB Isakhiwo

Izimiso zesakhiwo esibalulekile ze-MCPCB yamandla kagesi aphezulu ziqinisekisa ukuphepha nokuthembeka kukagesi:

• Ukuhlukaniswa kwesignali - Amathrekhi anamandla kagesi aphezulu agcina ukuhlukaniswa okuphezulu kusuka kumasekhethi okulawula ama-voltage aphansi kanye nezindiza ezingaphansi.
• Umzila womkhawulo - Hambisa izindlela zamandla kagesi aphezulu emaphethelweni ebhodi lapho kunokwenzeka khona ukuze ukwandise ukusetshenziswa kwebanga le-creepage.
• Ukulawula ukucindezeleka ensimini - Gwema ama-engeli abukhali namakhona agxilisa amasimu kagesi futhi andise ubungozi bokukhishwa okuncane.
• Ukuqaliswa kokulandela umkhondo - Ukulandelana okungenzeka okuphakathi phakathi kwamandla kagesi aphezulu kanye nengcindezi yezinga eliphansi lamandla kagesi kancane kancane.

Gcina ukuvunyelwa okungenani okungu-1mm kusuka emaphethelweni ebhodi ukuze uvimbele i-flashover iye ku-hardware ekhwezwayo noma izindawo ezivalekile kuma-MCPCB anamandla kagesi aphezulu.

Amasu Esakhiwo Esithuthukile

Ukubekwa kwengxenye yamasu kunciphisa ubude bokulandelela amandla kagesi aphezulu kuyilapho kugcinwa isikhala esidingekayo. Misa amatheminali kagesi aphezulu nezixhumi ukuze udale izindawo zokuzihlukanisa zemvelo.

Sebenzisa izimbobo zokukhweza ezinezimbobo kanye nokusikwa kwebhodi ukuze ukhulise imizila ye-creepage lapho imingcele yesakhiwo ivimbela isikhala esanele esiphezulu. Sebenzisa ukuthululwa kwethusi okunezimvume ezifanele ukuze uvikele amasekhethi azwelayo ekuphazamisekeni kwamandla kazibuthe kagesi aphezulu.

Ngamandla ombane angaphezu kuka-1000V, cabanga ukusebenzisa izinhlanganisela zobumba ukuze kuthuthukiswe ukwahlukanisa ngale kokuqhekeka kwendawo kuphela.

Ukulingisa nokuqinisekisa

Amathuluzi okulingisa inkundla kagesi ahlonza izindawo ezingase ziqhekeke kumadizayini we-MCPCB kagesi aphezulu ngaphambi kokwenziwa. Ukuhlaziywa kwezinto eziphelile kuveza izindawo zokugxilisa zenkambu ezidinga ukuguqulwa kwesakhiwo noma ukwahlukanisa okuthuthukisiwe.

Ukulingisa okuhambisana ne-Thermal-electrical kuqinisekisa ukuthi ukunyuka kwezinga lokushisa akuphazamisi amamajini okufakwa ngaphansi kwezimo zokusebenza ezimbi kakhulu. Ama-prototypes angaphambi kokukhiqizwa kufanele ahlolwe amandla aphezulu ku-voltage yokusebenza engu-2x kanye no-1000V umzuzu owodwa ukuze kuqinisekiswe ukufaneleka komklamo kanye nekhwalithi yokukhiqiza.

Isibonelo Somklamo We-MCPCB Esisebenzayo Esiphezulu

I-Case Study Parameters

Cabangela i-MCPCB kagesi ephezulu yohlelo lokusebenza lomshayeli we-600V DC LED enamandla angu-150W. Idizayini isebenzisa isisekelo se-aluminium esingu-1.6mm esinongqimba lwe-epoxy dielectric engu-200-micron enamandla okuphuka angu-4 kV/mm kanye ne-thermal conductivity engu-2 W/mK.

Indawo okusetshenzwa kuyo i-Pollution Degree 2 enezinga lokushisa elifinyelela ku-50°C. Amazinga okushisa okuhlanganisa ingxenye kufanele ahlale ngaphansi kuka-125°C kuyilapho kugcinwa ibanga elincane le-creepage elingu-8mm phakathi kwamandla kagesi aphezulu kanye nesisekelo sensimbi esisekelwe phansi.

Isu Lokuqalisa

Isakhiwo sigxilisa ukujikeleza kwamandla kagesi aphezulu endaweni ezinikele enomngcele ohlukanisiwe ongu-10mm kumasekhethi aseduze. Ukulandela ngomkhondo konogada ku-300V okungaba namandla okwenza izinguquko zamandla kagesi ezineziqu. Ukubekwa kwengxenye kunciphisa ubude bokulandelela amandla kagesi aphezulu bufinyelele ku-75mm isiyonke, kunciphisa ukuchayeka kwengcindezi kagesi.

Imaski ye-Solder inikeza ukufudumala okwengeziwe phezu kwemigqa, kanye nokugqoka okufana nokwemvelo okusetshenziselwa ukuvikela imvelo. Ukulingisa ukushisa kuqinisekisa izinga lokushisa eliphezulu lokuhlangana okungu-118°C kanye nokumelana nokushisa okungu-2°C/W kwe-junction-to-case ngesakhiwo se-MCPCB.

Imiphumela Yokuqinisekisa

Ukuhlolwa okunamandla aphezulu ku-1800V imizuzwana engama-60 kuqinisekisa ubuqotho bokwehlukanisa ngokuvuza kwamanje ngaphansi kwe-microampere engu-1. Ukuhlolwa okusheshisiwe kwempilo ku-80°C kuma-ambient kanye ne-voltage elinganiselwe engu-120% amahora angu-2000 kukhombisa akukho ukuwohloka kokumelana nokushisa.

Izilinganiso zenkundla zibonisa ukusebenza okushisayo okungaguquki ngezinga lokushisa lesisekelo sensimbi elingu-45°C ngaphezu kwe-ambient ngaphansi komthwalo ogcwele. Idizayini ikhombisa ngempumelelo ukuthi izimiso ezifanele ze-PCB yebanga le-creepage kanye nokwenza kahle kwebanga le-MCPCB kuletha ukusebenza okuthembekile kwamandla kagesi aphezulu.

Isiphetho

Idizayini ye-insulation kanye nebanga le-creepage imelela insika yokusetshenziswa okuphephile, okuthembekile kokusetshenziswa kwamandla kagesi aphezulu we-MCPCB. Ukusetshenziswa okuqinile kwezidingo zesikhala, ukukhethwa kwempahla, kanye nokwenza kahle kwesakhiwo kuvimbela ukuphuka kukagesi futhi kuqinisekisa ukusebenza kwesikhathi eside.

Izinzuzo ezishisayo zobuchwepheshe be-metal core kumele zilingane nezimfuno zokuhlukaniswa kukagesi ngobunjiniyela nokuqinisekisa. Ukulawulwa kwekhwalithi yokukhiqiza kuqinisekisa ukuthi amayunithi okukhiqiza ahlangabezana nezicaciso zedizayini ngokungaguquki:

• Ukuhlola okuzenzakalelayo - Iqinisekisa amabanga e-creepage futhi ihlonze ukwephulwa kwezikhala ngaphambi kokuhlangana.
• Ukuhlola okunamandla amakhulu - Iqinisekisa ubuqotho be-dielectric kumazinga kagesi adlula izidingo zokusebenza.
• Ukuqinisekisa okushisayo – Iqinisekisa ukuthi amazinga okushisa okuhlanganayo ahlala ngaphakathi kwemikhawulo ephephile ngaphansi kwezimo eziphezulu zamandla.

I-Highleap Electronics igxile ekukhiqizeni i-MCPCB enamandla aphezulu ngokusekelwa okuphelele komklamo wezinhlelo zokusebenza ze-elekthronikhi zamandla adinga amandla. Ithimba lethu lobunjiniyela linikeza izinsizakalo zokubuyekezwa komklamo, ukulingisa ukushisa, kanye nokuqinisekiswa kokuhambisana nomthetho ukuqinisekisa ukuthi amaphrojekthi akho e-voltage ephezulu ahlangabezana nezidingo zokuphepha kanye nezinhloso zokusebenza. Xhumana nathi ukuze uxoxe ngezimfuneko zakho ezithile ze-MCPCB enamandla aphezulu futhi uzuze kobuchwepheshe bethu ezixazululweni ze-PCB ezithuthukisiwe.