Hnub Ci Vaj Huam Sib Luag 12v

Hnub Ci Vaj Huam Sib Luag 12v Nqe lus piav qhia

Yuav tsum muaj tus tswj hwm tus nqi txhua lub sijhawm lub roj teeb yuav txuas nrog cov khoom siv hluav taws xob ncaj qha (DC) ntawm cov hnub ci vaj huam sib luag; Feem ntau nyob rau hauv me me off-grid systems. Ob hom kev them nqi tswj yog pulse-width modulation (PWM) thiab qhov siab tshaj plaws lub zog taw tes nrhiav (MPPT).

Tus nqi tswj tswj cov amperage thiab voltage uas xa mus rau cov loads thiab ib qho kev siv zog tshaj yog xa mus rau lub roj teeb system yog li cov roj teeb tswj lawv lub xeev ntawm kev them nyiaj tsis tau overcharged. Thaum yav tsaus ntuj thaum tsis muaj hnub ci, roj teeb lub zog yog siv los khiav lub nra.

Siv lub hnub ci module rau kev saib xyuas tam sim no qis tuaj yeem ua tiav yam tsis muaj tus tswj hwm tus nqi ntev npaum li lub hnub ci vaj huam sib luag tso tawm.<1% of the battery capacity.

Yog lawm, koj tuaj yeem ua tau. Qhov voltage tsis yog qhov kev txhawj xeeb ntau dhau, nws yog qhov tam sim no lub vaj huam sib luag tuaj yeem muab tau.

Qhov feem ntau hu ua 12V vaj huam sib luag feem ntau yog 36- cell module nrog qhib qhov hluav taws xob ntawm 22V, ua rau lub zog siab tshaj plaws ntawm 18V. Kev lig kev cai thiaj li hu ua 24V panels yuav muaj ob lub hlwb (72 hlwb), thiab lawv yuav ua 36V-44V nyob rau sab saum toj kawg nkaus. Tsis ntev los no kuj tseem muaj ntau ntawm 60- cell modules uas ua rau qhov chaw ntawm 30V thiab 40V, uas yog qee zaum hu ua "24V-panels". Raws li koj tuaj yeem pom, 12V panels tsis yog 12V thiab 24V panels tsis yog 24V. Lawv feem ntau yog tsim los tso tawm tsawg kawg 30 feem pua ​​​​ntawm cov roj teeb uas lawv npaj yuav them.

Qhov no ua haujlwm zoo kawg nkaus vim tias PV module yog (nyob rau theem teeb pom kev tas li) lub cuab yeej tam sim no. Yog tias koj saib tom qab, koj yuav pom nws muaj kev ntsuas rau Isc (luv luv tam sim no) thiab Imax (qhov siab tshaj plaws tam sim no). Ob qhov txiaj ntsig no feem ntau yog ze rau ib leeg. Tam sim no… dai rau koj lub kaus mom: Qhov no yog qhov tam sim no uas nws yuav them txawm tias qhov hluav taws xob twg koj them ntawm. Nco ntsoov tias koj twb tau ua qhov no thaum koj xaim "12V vaj huam sib luag" rau 12V roj teeb, vim tias koj qhov tseeb rub 22V ntawm lub vaj huam sib luag mus rau 12V.

Nws tsis yog ib yam uas ua tau zoo heev. Cia kuv piav. Wb hais tias koj muaj 200W module nrog 72 hlwb. Vmp yuav tsum nyob ib ncig ntawm 36V, thiab Imax yuav tsum nyob ib ncig ntawm 200/36=5.5 ampere.

Yog tias koj xaim qhov module mus rau 12V roj teeb, nws yuav them lub roj teeb ntawm 8.3 ampere, thiab rub lub voltage mus rau qhov twg lub roj teeb tuaj yeem ua tau. Piv txwv li, yog tias lub roj teeb rub mus txog 14.7V, koj yuav them ntawm 14.7 * 5.5=80.85watts.

Woah, lub zog ntxiv mus qhov twg? Nws tau poob vim hais tias lub module yog tam sim no tsis tu ncua, thiab koj ua hauj lwm ntawm ib tug tsawg voltage.

Qhov no yog qhov uas MPPT tuaj rau hauv. MPPT yog qhov tseem ceeb ntawm kev hloov kho DC-rau-DC uas yog lub hom phiaj los khiav PV module ntawm qhov zoo tshaj plaws fais fab theem (36V hauv peb qhov piv txwv), thiab tom qab ntawd down-hloov qhov voltage (swapping. volts rau amps zoo li transformer ua), thiab tom qab ntawd them lub roj teeb 12V ntawm 200W, lossis 200/14.7=13.6 ampere.

Yog li rov qab mus rau lo lus nug: Kuv puas tuaj yeem txuas 24V hnub ci module rau 12V roj teeb? Tseeb ... tsuav yog qhov Imax teev nyob rau sab nraum qab ntawm lub vaj huam sib luag yuav tsis ua rau nws puas, koj tuaj yeem ua qhov ntawd. Tab sis nws yuav ua tsis tau zoo heev. Qhov kev xaiv zoo dua yuav yog siv MPPT-based charger.

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