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giongiu

Invertor sinus pur, Mean Weel

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Am primit la reparat un astfel de invertor, de 12V/1500W. Dusi mosfetii din convertorul DC-Dc si doua IGBT-uri din puntea H. Din cauza mosfetilor s-au dus si rezistentele din porti, dar partea proasta e alta. De la aceste rezistente sau supraincalzit si altele, care se pare fac parte din circuitul de stabilizare a tensiunii de 300V. Tensiunea respectiva nu mai e stabilizata, creste undeva peste 400V, dupa care invertorul intra in protectie.Una peste alta, as avea nevoie de-o schema, sau daca exista un eventual posesor al acestui model, poate ar putea face cateva poze, sa-mi dau seama ce valori au rezistentele respective.

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