Re: MAX 712, NiMH tölto
Fischer László
Fischer.Laszlo at enternet.hu
Sun Feb 22 17:00:40 CET 2004
A túl hamar történo kikapcsolás megoldódott, nyáktervezési hiba volt, de a
tranyó még a nagy hutoborda ellenére is kb. 40 fokos. Hány fokig lehet
elmenni? (kisebb hutobordát szeretnék rárakni.)
Laci
----- Original Message -----
From: "Fischer László" <Fischer.Laszlo at enternet.hu>
To: <elektro at tesla.hu>
Sent: Sunday, February 22, 2004 1:47 PM
Subject: MAX 712, NiMH tölto
Köszi a választ!
A huton 10db borda van, kb 2 centisek.
Teljesen kimerített aksit próbáltam most tölteni. Kb. 20 percig ment a
gyorstöltés(kb.0,5A), majd lekapcsolt a gyorstöltés. A feszültséértékeket
nézegetve nem látok fesz.esést, nem tudom, miért kapcsolt le... (a levél
végén mellékelve a fesz.lista)
Ha valaki találkozott hasonló problémával, kérem írjon!
Fischer László
Szerintem nem!
Probalok fajlagosan szamolni. Mondjuk nem tom, milyen fajta hutobordara
raktad,
de nekem olyan hutokon futnak ilyen aramkorok, aminek a szelessege kb 12
centi,
a bordak kb 5 centisek (merolegesen a szerelofeluletre) es van vagy 10 db
beloluk, tehat ez a melysegi meret, es a 0,48A-re eso hossza a hutobordanak
0,74
mm. :-) Es nemigen melegszik, mondjuk fel ora mulva langyos lesz. De persze
levegon, ez olajba van szanva. Szoval van ott meg mit keresni a veszteseget
illetoen. Szkoppal kell nezegetni ezeknel a kapcsolasi folyamatokat, es
minden
kiderul.
Vagy felreertettem, es borda alatt egy alu lemezt kell erteni. De akkor se
kene
melegednie. Ekkora feluletnek tobb amperes jo nagyfrekis (100kHz)
kapcsolgatastol kellene csak melegednie.
hjozsi
Építettem a MAX 712 IC-vel egy akkutölto áramkört az adatlapjában megadott
>kapcsolás alapján. Muködés közben a tranzisztor nekem nagyon melegszik,
egy10x3 >cm-es hutobordát raktam rá, így már csak jó meleg lesz. Két aksit
töltöttem 0,48A-rel. >Táplálásra 12V-ot használtam.
>Az lenne a kérdésem, hogy normális-e ez a melegedés?
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