Lub Hwj Chim Tom Qab Thaum Tshav Kub Kub: Sib piv cov khoom siv hluav taws xob rau 5V Cartridge rhaub
Tso lus
Ib tug engineer xaiv lub siab -zoo 5V ib leeg- lub taub hau cartridge rhaub uas muaj peev xwm tuav 40 Watts, nruab nws kom meej, thiab txuas nws mus rau lub USB phab ntsa charger. Cov txiaj ntsig tsis txaus siab; lub kaw lus muaj teeb meem mus rau qhov kub thiab txias. Cov neeg feem ntau liam lub rhaub, tab sis qhov teeb meem tiag tiag feem ntau yog qhov tsis zoo lossis tsis sib haum nrog lub hwj chim uas zaum ntsiag to ntws.
Hauv qis-voltage, siab- DC tshuab tam sim no, lub zog hluav taws xob thiab lub tshuab cua sov yog nyob ze rau ib leeg thiab tsis tuaj yeem hloov pauv, raws li cov cai hluav taws xob yooj yim. Txhawm rau khiav lub rhaub 40W ntawm 5V, koj xav tau qhov tam sim no tsis tu ncua ntawm 8 Amps (I=P / V). Feem ntau USB-A chargers tsuas tuaj yeem them ntawm 2.4A lossis tsawg dua. Txawm tias tam sim no USB-C Fais Fab Xa (PD) chargers tsuas tuaj yeem muab ntau tshaj li theem pib 5V/3A (15W) yog tias lawv tau teeb tsa ua li ntawd. Tsuas yog txuas lub rhaub rau hauv qhov chaw nres nkoj uas tsis tau sib tham yuav txiav nws lub zog.
Yuav ua li cas thaum cov khoom siv tsawg dhau
Yog tias lub zog hluav taws xob tsis tuaj yeem ua tiav qhov kev thov, lub kaw lus tawg hauv ib qho ntawm ob txoj hauv kev:
Kev txwv tam sim no / kaw: Ib qho "ntse" cov khoom siv nrog ntau tshaj - kev tiv thaiv tam sim no yuav txwv lossis txiav tawm, ua kom lub rhaub kom tsis txhob ncav cuag qhov chaw ua haujlwm.
Voltage Sag: Tus nqi pheej yig, tsis muaj kev tswj hwm yuav poob nws cov zis hluav taws xob thaum nws nyob rau hauv load. Yog tias lub rhaub tau txais 4.0V xwb tsis yog 5.0V, nws lub zog tso zis poob mus txog 64% ntawm qhov nws yuav tsum yog (P ∝ V²). Lub tshuab cua sov uas tib neeg xav tias "tsis muaj zog" yog qhov tseeb uas tsis tau txais lub zog txaus.
Qhov tseem ceeb "Cold Start" Surge
Lub inrush tam sim no, feem ntau hu ua "kev pib txias" surge, yog ib qho teeb meem uas feem ntau tsis quav ntsej. Cov hlau uas tiv taus (feem ntau NiCr) muaj qhov zoo ntawm qhov kub thiab txias (PTC). Thaum nws txias, nws qhov kev tiv thaiv tuaj yeem qis li 1/10 mus rau 1/20th ntawm qhov nws yog thaum nws kub. Yog li, thaum lub hwj chim qhib, thawj qhov sib npaug ntawm qhov tam sim no tuaj yeem yog 10 txog 20 npaug ntawm qhov ruaj khov- lub xeev tam sim no. Lub rhaub 8A tuaj yeem xav tau 80 txog 160A rau lub sijhawm luv luv.
Lub zog hluav taws xob yuav tsum muaj zog txaus los tswj qhov kev nce siab no yam tsis muaj kev tiv thaiv, lossis lub zog tswj yuav tsum muaj qhov muag muag - pib ua haujlwm. Mos- pib maj mam nce qhov voltage thiab tam sim no, uas txwv cov inrush. Qhov no tsis tsuas yog tiv thaiv cov khoom siv hluav taws xob xwb, tab sis nws kuj tseem txo qis cov thermal thiab mechanical kev ntxhov siab ntawm lub rhaub dej hauv lub coil, uas ua rau nws kav ntev dua. Qhov no yog lub hauv paus ntsiab lus uas tau paub ntev ntev hauv lub tshuab nqus tsev thiab lwm yam kev siv cua sov.
Tus yeeb ncuab koj tsis pom: Kev tiv thaiv kab mob
In a 5V system, every milliohm of resistance in the power path is a thief. If the load is 8A and the cable and connection resistance is only 0.1 ohms, the voltage will drop by 0.8V (V_drop = I*R). The heater terminals now only have 4.2V, which is a 16% voltage loss that leads to a >30% zog poob. Lub zog uas yog squandered tshwm sim li cua sov nyob rau hauv cov xov hlau thiab connectors. Yog li, kev ua haujlwm luv luv, tuab xov hlau (16 AWG lossis loj dua rau kev khiav dhau ob peb ntiv tes) thiab siab - cov khoom txuas tam sim no tsis yog ib qho kev tawm tswv yim xwb; nws yog ib qho tseem ceeb rau kev ua haujlwm.
Kev xav tau ruaj khov, huv huv
Kev tswj hwm DC fais fab mov yog tsim nyog rau kev tswj xyuas qhov kub thiab txias. Cov zis hluav taws xob ntawm cov khoom siv tsis raug cai hloov pauv nrog cov kev hloov pauv hauv AC kab thiab cov khoom thauj, uas ua rau lub rhaub dej tso tawm tawm. Qhov no ua rau nws tsis tuaj yeem ua kom PID tswj tsis tu ncua, uas ua rau kub nce thiab nqis. Lub hwj chim tswj tau zoo lossis lub tshuab hluav taws xob sib cais tsav tsheb nrog PWM (Pulse Width Modulation) tswj los ntawm MOSFETs muab rau koj ruaj khov, huv si DC koj xav tau rau kev ua tau zoo.
Xaus: Ib qho tag nrho -Nyob hauv -Ib Lub Hwj Chim
Qhov kev ua tau zoo ntawm 5V cartridge rhaub yog ncaj qha ntsig txog txoj kev uas nws tau txais hluav taws xob los ntawm lwm qhov system. Xaiv lub rhaub tsuas yog thawj kauj ruam xwb. Tus tsim ntawm lub system yuav tsum muaj xws li:
Lub zog hluav taws xob uas tuaj yeem muab qhov tsim nyog txuas ntxiv tam sim no ntawm 5V thiab tswj qhov kev nce siab ntawm inrush tam sim no.
Kev xaim kom zoo nrog kev ua haujlwm qis thiab muaj zog kawg.
Kev tswj hluav taws xob kom ruaj khov.
Mos- pib circuitry ua rau lub rhaub kom ntev dua (rau cov khoom siv uas muaj hwj chim ntau).
Cov qauv xa hluav taws xob yuav tsum tau tsim los ua haujlwm nrog cov khoom siv thermal rau lub hom phiaj- cov ntawv thov tseem ceeb. Kev kuaj xyuas lub peev xwm tam sim no, xaim, thiab kev tswj xyuas kom paub tseeb tias lub tshuab hluav taws xob lub tshuab hluav taws xob muaj peev xwm thiab ntsuas watts tau mus txog ntawm nws cov terminals. Qhov no hloov nws los ntawm qhov muaj peev xwm ua rau lub raj xa dej mus rau qhov chaw muaj kev ntseeg siab thiab muaj txiaj ntsig zoo.
