Eng. Elena STEFAN, Eng. Tudor ISOC, Prof. PhD. Eng. Horia BALA
Rezumat
Problema comutatiei, la intreruptoarele de tensiune continua se refera la aparate electrice de comutatie si se
manifesta diferit in curent continuu, fata de curentul alternativ. La deconectare, comutatia este insotita de obicei de amorsarea, arderea si stingerea arcului electric, iar intreruperea unui circuit de tensiune continua se realizeaza prin metoda
generarii tensiunii inverse, oscilatiei curentului divergent si injectarii curentului invers. Lucrarea de fata prezinta o varianta
de contactor cu IGBT-uri utilizat la deconectarea prin injectie de curent invers a intreruptoarelor de tensiune continua.
Cuvinte cheie: comutatieinjectie de curent inversIGBT.
Abstract
The DC circuit breakers switching problem refers to electrical switching devices and applies differently in DC as
in AC. The switching is usually accompanied by the ignition, the burning and the extinction of the electric arc as well in the
connection but especially in the disconnection. The breaking of the DC circuit is achieved using the inverse voltage generation method, the divergent current oscilation method and the inverse current injection method. This paper presents a contact with IGBT transistors, used to disconnect the DC circuit breakers applying the injection of inverse current.
Keywords: switchinginverse current injectionIGBT
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