Dab tsi yog cov ntsiab lus tseem ceeb uas txiav txim siab lub neej ntawm cov khoom siv hluav taws xob LED?
Lub neej ntawm LED cov khoom siv hluav taws xob feem ntau yog luv dua li ntawm LED chips lawv tus kheej (lub neej ntawm LED chips tuaj yeem ncav cuag ntau dua 50,000 teev, thaum LED cov khoom siv hluav taws xob tsuas yog10,000 txog 30,000 teev).
Cov yam tseem ceeb cuam tshuam rau nws lub neej tuaj yeem muab faib ua plaub pawg:tivthaiv kev laus, tsim tsis xws luag, ib puag ncig kev nyuaj siab thiab kev siv tej yam kev mob.
Cov hauv qab no yog ib qho kev ntsuam xyuas tshwj xeeb:
1. Degradation ntawm electrolytic capacitors (lub ntsiab ua rau tsis ua hauj lwm)
Qhov chaw ntawm qhov teeb meem:
Electrolyte kom qhuav (nqus tau los ntawm qhov kub siab), nce ESR (sib npaug series tsis kam), thiab muaj peev xwm attenuation.
Feem ntau nyob rau hauv input / output lim capacitors, accounting rau ntau tshaj 60% ntawm fais fab mov tsis ua hauj lwm.
Kev txhim kho kev ntsuas:
Xaiv 105℃siab kub thiab lub neej ntev capacitors (xws li "105℃/ 5000 teev" specifications).
Siv cov khoom siv hluav taws xob hloov pauv (tsis muaj electrolyte, lub neej txuas ntxiv los ntawm 3 mus rau 5 zaug).
Txo qhov kub nyob ib ncig ntawm lub capacitor thaum lub sij hawm tsim (kom deb ntawm qhov chaw tshav kub thiab txhim khu cov cua kub dissipation).
2. Ua tsis tiav ntawm cov khoom siv semiconductor
Cov ntsiab lus tseem ceeb:
Hloov raj (MOSFET): Overvoltage / overcurrent ua rau tawg, thiab lub rooj vag oxide txheej degrades ntawm qhov kub thiab txias.
Rectifier diode: Rov qab rov qab poob ua rau thermal qaug zog (xws li cov pa tawm tam sim no ntawm Schottky diode).
PWM tswj IC: Ntev-lub sij hawm siab- kub ua haujlwm ua rau sab hauv tsis muaj zog.
Kev txhim kho kev ntsuas:
Txuag txaus voltage / tam sim no cov npoo (xws li 600V MOSFET rau 220V input).
Siv cov cuab yeej hloov pauv (xws li LLC topology) kom txo qis kev hloov pauv.
Optimize tshav kub dissipation tsim (xws li ntxiv cov dab dej kub thiab thermal conductive kua nplaum).
3. Kev tswj xyuas thermal tsis raug
Kub cuam tshuam:
Rau txhua txhua 10℃nce nyob rau hauv ambient kub, lub neej ntawm electrolytic capacitors yog halved (Arrhenius txoj cai).
Kev kub siab ua rau kev laus ntawm cov xim pleev xim ntawm cov khoom sib nqus (transformers / inductors).
Kev txhim kho kev ntsuas:
Txwv qhov kub thiab txias sab hauv ntawm cov khoom siv hluav taws xob (xws li kev ua kom zoo tshaj plaws los ntawm kev simulation thermal).
Siv cov khoom siv hluav taws xob kub siab (xws li cov khoom siv hluav taws xob nrog Class H rwb thaiv tsev).
Zam kev teeb tsa hauv qhov chaw kaw (cov khoom siv hluav taws xob sab nraum zoov xav tau kev tiv thaiv IP thiab qhov sib npaug ntawm cov cua sov).
4. Circuit Court tsim thiab topology xaiv
Design defects:
Ntau dhau qhov voltage / tam sim no kev ntxhov siab: Piv txwv li, lub flyback Circuit Court RCD nqus lub voj tsis tsim kom zoo, ua rau muaj qhov hluav taws xob loj ntawm lub raj hloov.
Kev tsis zoo ntawm lub voj voog tsis zoo: Cov lus teb tsis raug them nyiaj ua rau oscillation thiab accelerates tivthaiv kev laus.
Kev txhim kho kev ntsuas:
Xaiv qhov siab -txoj kev ua tau zoo topology (xws li PSR cov lus qhia thawj zaug los txo cov khoom nruab nrab).
nruj me ntsis ntsuas dynamic load teb thiab luv - tiv thaiv Circuit Court.
5. Ib puag ncig thiab siv tej yam kev mob
Lwm yam tseem ceeb:
Moisture / plua plav: ua rau PCB corrosion thiab tsis txaus creepage nrug (xws li cov chaw ntug dej hiav txwv xav tau peb -cov pov thawj xim xim).
Kev hloov pauv ntawm daim phiaj: Ntau zaus voltage surges puas lub input lim circuit (varistor TVS yuav tsum tau ntxiv).
Kev hloov pauv tsis tu ncua: Lub caij txias pib tam sim no cuam tshuam cov capacitors thiab cov raj hloov.
Kev txhim kho kev ntsuas:
Ntxiv kev tiv thaiv xob laim/surge tiv thaiv (xws li MOV + GDT ua ke).
Rau cov xwm txheej hauv kev lag luam, xaiv lub hwj huam mov nrog cov tswv yim dav dav (xws li 85V ~ 305VAC).
muaj kuj siv rau55 txog 60℃siab kub ua haujlwm ib puag ncig LED teeb, koj tuaj yeem sab laj rau http://www.benweilight.com
6. Cov txheej txheem thiab cov khoom siv
Tej yam teeb meem:
Tsis muaj zog solder pob qij txha / txias solder pob qij txha ua rau muaj zog tiv thaiv.
PCB board tsis zoo (xws li FR-4 nrog qhov kub tsis txaus).
Kev txhim kho kev ntsuas:
Redundant soldering lossis tsis siv neeg kho qhov muag (AOI) yog siv rau cov pob qij txha tseem ceeb.
Ceramic substrates lossis aluminium substrates yog siv rau cov xwm txheej muaj kev ntseeg siab.
Cov qauv ntsuas lub neej
Muaj- qib fais fab mov: feem ntau nrog lub neej nominal ntawm Ntau dua lossis sib npaug rau 50,000 teev (xws li Mean Well series).
Civilian- qib fais fab mov: 10,000 ~ 30,000 teev (tus nqi tseem ceeb).
Accelerated aging test:
Kev ntsuas kub thiab av noo (85℃/ 85% RH, 1000 teev).
Hloov lub voj voog ntsuas (ntau tshaj 100,000 lub sijhawm ntawm kev hloov ntawm thiab tawm).
Cov lus qhia siv rau kev ncua lub neej
Tsis txhob ntev - lub sij hawm puv - kev ua haujlwm thauj khoom (tso 20% fais fab tuag).
Ntxuav lub qhov hluav taws xob cua sov dissipation qhov tsis tu ncua (kom tiv thaiv plua plav paug).
Xaiv qhov tsav tam sim no tsis tu ncua (kev tiv thaiv zoo dua rau txoj hlua LED tshaj qhov hluav taws xob tas li).
rau kev siv ntau24 teev txhua hnubcoj teeb cov ntaub ntawv, koj tuaj yeem sab laj rauhttp://www.benweilight.com
