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ELFORUM - Forumul Electronistilor
miticamy

Osciloscop, oscilograme...

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Fara oscilograme mai punem simulari.

1) Flyback autooscilant:

6.jpg

2) Flyback cu 3842:

28.jpg

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E mai simplu cu simulari decat cu oscilograme.

Azi despre traful din invertoarele CCFL.  Este cu cuplaj slab, se vede distanta dintre primar si secundar. Condensatorul din secundar la rezonanta cu inductanta de scapari produce tensiunea max pe iesire necesara amorsarii tubului.

Cu alimentare la 15V, semipunte, raport ridicator 1:10 se ajunge in secundar la un varf de 3400V

17.jpg

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Azi am avut un PFC pe masa, am facut o poza. Sincro cu reteaua, 100V/div:

IMG-20200213-165434-8.jpg

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