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pop_ady44

variator turatie ventilatoare 12 volti in functie de temperatura sau cu o turatie fixa

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Va salut 

Vreau sa fac o automatizare in incubator, si sa folosesc ventilatoare de 12 volti, (calculator)4-5 in paralel pentru a omogeniza temperatura in incinta .

Recomandati-mi va rog o schema care sa duca cel putin 2A, fara a se incinge stabilizartorul .

Precizez ca alimentare am 13 volti doar nimic mai mult .

Ideal ar fi in funtie de temperatura dar pragul este cam mic 35-38 grade .

pana in 30-35 grade sa mearga turate maxim ,peste sa se reduca la 60-70 %

reducand astfel consumu si uzura lagarelor .

 

Multumesc anticipat celor care se vor obosi sa raspunda .

Edited by pop_ady44

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Salut.

 

Din cate imi amintesc, ventilatoarele de pc consuma in jur de 80-120mA, pentru 4-5 in paralel ai nevoie de 1A si asta cu rezerva de curent.

Scheme sunt cu carul pe internet, am dat cautare "fan temperature control".

 

Cateva exemple. la alegere:

 

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Ale mele sunt cu 0.30A deci 1,5A la 5 ventilatoare ar insemna sa fac grupuri de cate 2 ventilatoare ,cea ce ar fi destul de nasol de reglat , nu imposibil dar ...

 

De acea ma gandesc ca sunt ceva scheme care sa duca minim 2A, fara a se incinge, avand in vedere ca vor merge 24din 24, 7 din 7 .

 

http://www.datasheetlib.com/datasheet/1253822/sp802512h-03-w_bi-sonic-technology-corporation/download.html

Asa ceva folosesc .

Edited by pop_ady44

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Pai atunci incearca  schema cu mosfet, un IRF740 cred ca ar merge brici, pus pe un mic radiator.

Cu 3 lei cumperi si mosfet si termistor.

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Da L200 e bun de luat in calcul .

Da si varianta cu mosfet pare ok le voi testa .

Edited by pop_ady44

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Schemele postate sunt ok dar merg invers de cit vreau eu .

Deci repet :

-Cu cat creste temperatura sa scada turatia .

-temperatura maxima va fi 37-38 grade unde ventilatoarele vor merge la minim (cam 10 volti)

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schimbi intre ele semireglabilul cu termistorul si merge invers...

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