12.07.2015 Views

Untitled

Untitled

Untitled

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Struja transformatora / Transformer current(A)1 6001 2008004000Slika 10Potpuni model,T uk = 15 ms, rem = 0,8 nomFigure 10Complete model,T uk = 15 ms, rem = 0,8 nom-4000 0,02 0,04 0,06 0,08 0,1Vrijeme / Time (s)1 200(Vs)Magnetski tok / Magnetic flux80040000 0,02 0,04 0,06 0,08 0,1Vrijeme / Time (s)6 KOMPARACIJA SMJERENJIMARazvijeni program se moæe dalje generalizirati namodeliranje trofaznih transformatora, gdje su krivuljemagnetiziranja predstavljene preko konaËnogbroja pravaca. Tada se vrijednosti struja magnetiziranja,po fazama, raËunaju iz formule [20]:6 COMPARISON WITHMEASUREMENTSA developed program can be further generalized forthe modeling of three-phase transformers, wherethe magnetizing curves are represented by a finitenumber of straight lines. The values of the magnetizingcurrent, according to phases, are then calculatedfrom the following formula [20]:(35)U posljednjoj relaciji su krivulje magnetiziranja,po fazama, dane s vektorima:In the previous expression, the magnetizing curves,according to phases, are represented by vectors:603TokiÊ,A., UglešiÊ, I., NumeriËki proraËun niskofrekvencijskih..., Energija, god. 56(2007), br. 5., str. 584-607TokiÊ, A., UglešiÊ, I.,The Numerical Calculation of..., Energija, vol. 56(2007), No. 5, pp. 584-607

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!