Ama-PCB we-Power Electronics – Imihlahlandlela Yokuklama Ye-PCB Enamandla Aphezulu

Kungani I-Heavy Copper PCB Ingeyona Isixazululo Njalo

Onjiniyela abaningi bazenzakalela ku-4–6 oz copper kumadizayini we-PCB yama-electronics, kodwa ithusi elisindayo lidala izinselele zokukhiqiza. Izingxenye ze-fine-pitch azikwazi ukudayiswa ngendlela enokwethenjelwa, futhi zibiza kakhulu.

Kunalokho, cabangela lezi ezinye izindlela ezifakazelwe:

• Sebenzisa ithusi elingu-2 oz elinezindlela ezihambisanayo ezendlalelo eziningi ukuze uthole imikhondo ye-PCB ye-electronics yamanje ephezulu.
• Sebenzisa amasu okuthela ithusi ngokukhululeka okushisayo okufanelekile kokukhwezwa kwe-PCB ye-semiconductor yamandla.
• Engeza izindawo zamabhasi zangaphandle kuphela lapho okwamanje kudlula u-50A ngokuqhubekayo.

Kuphrojekthi yakamuva ye-30kW DC-DC Converter PCB , sinciphise izindleko ngo-40% sisebenzisa ukusatshalaliswa kwethusi okuhlakaniphile kunethusi elisindayo eligcwele. Isihluthulelo? Ukuqonda ukuthi ugesi ugeleza kuphi ngempela uma kuqhathaniswa nokucabanga ukuthi konke kudinga ithusi eliphezulu.

I-Thermal Via Design Esebenza Ngempela

Khohlwa amafomula ezincwadi mayelana ne-thermal vias. Nakhu okusebenzayo ekukhiqizeni:

Faka i-thermal vias kuphethini yegridi engu-1.2 mm ngaphansi kwamandla ama-MOSFET nama-IGBT. Sebenzisa i-diameter engu-0.3 mm egcwele i-epoxy conductive—hhayi i-hollow vias that trap flux. Ngokuhlanganiswa kwe-PCB ye-electronics enamandla ne-vapor phase soldering, lokhu kuvimbela ukwakheka okuyize okubulala ukusebenza okushisayo.

I-PCB ye-motor drive yeklayenti yehle amazinga okushisa okuhlangana ngo-15 °C ngokusuka nje okungahleliwe ngokubeka iphethini yethu yegridi ethuthukisiwe. Umgomo ofanayo uyasebenza noma ngabe uklama i-5 W
Amandla Converter PCB noma imojula yamandla ezimboni engu-5 kW PCB.

I-Gate Drive Isakhiwo—Isici Sokwenza noma Sephula

Isakhiwo sedrayivu yesango esingesihle sicekela phansi ama-semiconductor amandla amaningi kunanoma isiphi esinye isici somklamo. Ibanga ukusuka kumshayeli ukuya esangweni le-MOSFET akufanele lidlule ku-15 mm. Kodwa ubude akuyona yonke into.

Izici ezibalulekile zokushintsha okuthembekile:

• Hlukanisa imithombo kanye nemizila yokucwila enamanani ahlukene aphikisayo.
• Gcina i-loop yesango ingaphansi kuka-50 mm².
• Ungalokothi ulandele umkhondo wesango eduze nendawo yokushintsha.
• Sebenzisa ama-resistors amasango angu-0805, hhayi okuthi 0603—aphatha ama-surge currents kangcono.

Inqubo yethu yokuhlanganisa i-PCB ifaka phakathi ukuhlolwa okuzenzakalelayo kwe-optical ikakhulukazi kwe-geometry ye-gate drive, ukubamba izinkinga zesakhiwo ngaphambi kokuba amadivayisi kagesi abizayo onakale.

Ukwehliswa kwe-EMI Ngaphandle Kokwengeza Izindleko

Izihlungi ezibizayo ze-EMI zivame ukunxephezela ukwakheka okungekuhle kwe-PCB. Idizayini ye-Smart power electronics PCB inciphisa ukukhishwa kwezinto emthonjeni. Misa ama-capacitor okokufaka phakathi kuka-10 mm wemishini yokushintsha. Dala izindlela ezibuyayo ngqo ngaphansi kokulandela imvamisa ephezulu usebenzisa izindiza eziphansi.

Kumadizayini e-PCB e-AC-DC Converter , sebenzisa ama-Y-capacitor ngendlela efanele—awawona nje kuphela awokudlula izivivinyo zokuphepha. Wabeke phakathi kwezindawo eziyinhloko nezesibili lapho imisinga yemodi evamile igeleza khona ngokwemvelo, hhayi ngokungahleliwe ngaphesheya kwesithiyo sokuhlukaniswa.

Ukuhlolwa Kweqiniso Lokukhetha Kwengxenye

Leyo capacitor yebanga lezimoto ilinganiselwe ku-125 °C? Kungase kuhlale amahora angu-1000 kulelo zinga lokushisa. Ngokuthembeka kweminyaka eyi-10 kuzinhlelo zokusebenza ze-PCB zama-electronics, nciphisa ngo-20 °C ubuncane. Okufanayo kusebenza kuma-inductors amandla—izilinganiso zamanje zokugcwaliswa kwesikhala zithatha indawo engu-20 °C, hhayi u-70 °C ngaphakathi kwendawo ebiyelwe.

Sigcina isizindalwazi samazinga okwehluleka kwezingxenye ezivela ezinkulungwaneni zezinhlangano ze-PCB ze-elekthronikhi zamandla. Ngokumangazayo, izixhumi ziyahluleka kaningi kunezi-semiconductor lapho kusetshenziswa ukuhlukaniswa okufanele. Yingakho isevisi yethu yokukhiqiza nge-elekthronikhi ifaka phakathi ukuhlolwa kokucindezeleka kwezixhumi ngale kwemininingwane yeshidi ledatha.

Ukuhlola Okuvimbela Ukwehluleka Kwenkambu

Ukuhlola ukusebenza okuyisisekelo akwanele kuma-electronics wamandla. Ukuhamba ngebhayisikili okushisayo ukusuka ku--40 °C kuya ku-+85 °C kuveza amalunga asemaphethelweni e-solder. Ukuhlolwa komswakamo ku-85 °C / 85% RH kuveza ukunamathela okunemithetho enganele. Kodwa ukuhlolwa okubaluleke kakhulu? Ukushiswa kwamandla agcwele ngezinga lokushisa elilinganiselwe eliphezulu.

Sithole ukuthi ukushisa kwamahora angu-48 kubamba u-90% wokwehluleka kokuqala kuma -PCB assemblies e-Power Inverter . Izindleko zokusha azinakwa uma kuqhathaniswa nokubuyiselwa kwensimu.

Khetha izinto ze-PCB laminate ezifanele izinga lokushisa lakho lokusebenza. I-FR-4 ejwayelekile isebenza kahle ku-130 °C, kodwa izinto ze-Tg ephezulu zivimbela ukuhlukaniswa kwezakhi zokusebenza ezidinga amandla. Kumaza angaphezu kuka-500 kHz, cabanga ngezinto zokulahlekelwa okuncane ukuze ugcine ukusebenza kahle.

Bambisana ne-Highleap Electronics ekukhiqizeni ama-PCB kagesi ahlinzeka ngokuthembeka, hhayi nje ngemininingwane. Ubuchwepheshe bethu bokukhiqiza ama-PCB bukusiza ukuthi ugweme izingibe ezivamile ngenkathi ulungiselela izindleko nokusebenza kahle.