ELFORUM - Forumul electronistilor

# Convertor AC-DC

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Am un transformator toroidal de 2*27V cu 4A pe fiecare secundar. Puterea lui e in jur de 200VA. Vreau o schema cu tensiune redresata la 12V CC si un amperaj cat mai mare,in jur de 15A :finga: . Stiu ca la o punte redresoare de 35A are in jur de 37V CC pe fiecare secundar. Vreu o shema pe trazistoare de putere usor de gasit in comert.

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Greu de facut, trebuie sa faci un convertor DC-DC cu un randament de min 90%, 12V*15A = 180W, si tu ai 200VA(presupunem acum ca VA=W, dar nu este) => (180/200)*100 = 90%.Daca faci regulator liniar, atunci ai max 4A, sau cat scoate traful, restul se disipa in forma de caldura :finga:

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