Lub Hwj Chim Tom Qab Thaum Tshav Kub Kub: Sib piv cov khoom siv hluav taws xob rau 5V Cartridge rhaub

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 cov khoom siv hluav taws xob tsis tuaj yeem ua raws li qhov xav tau, lub kaw lus tawg hauv ib qho ntawm ob txoj hauv kev:

Tam sim no txwv/Shutdown: Lub "ntse" fais fab mov nrog ntau tshaj - kev tiv thaiv tam sim no yuav qeeb los yog tso tseg cov zis, uas yuav ua rau lub rhaub kom txog thaum nws ua haujlwm.

Voltage Sag: Yog tias koj siv cov khoom pheej yig, tsis muaj kev tswj hwm, qhov tso zis hluav taws xob yuav poob thaum koj muab lub nra rau nws. 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 tsis kam, uas feem ntau yog NiCr, muaj qhov Zoo Kub Coefficient (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. Cov cua sov hauv cov xov hlau thiab cov khoom sib txuas yog dab tsi tshwm sim rau lub zog uas yog squandered. Yog li, nws tsis yog ib qho lus qhia kom siv luv luv, tuab conductors (16 AWG lossis loj dua rau kev khiav ntev dua li ob peb nti) thiab siab - tam sim no connectors; nws yog ib qho yuav tsum tau ua kom zoo.

Xav tau lub hwj chim uas huv thiab ruaj khov

Kev tswj hwm DC fais fab mov yog tsim nyog rau kev tswj xyuas kom raug thermal. 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 xav tau tas li tam sim no ntawm 5V thiab tswj qhov surge ntawm inrush tam sim no.

Kev xaim kom zoo nrog qhov tsis muaj zog thiab kev sib txuas muaj zog.

Voltage tswj kom ruaj khov.

Mos- pib circuitry ua rau lub rhaub kom ntev dua (rau cov tshuab uas muaj watts ntau).

Lub zog xa hluav taws xob thiab cov khoom siv thermal yuav tsum ua haujlwm ua ke 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.