20.500.12556/RUL-94326 Povijanje transformatorskih jeder Banding transformer cores Zaključna naloga obravnava povijanje magnetnih jeder transformatorja. Problem povijanja je zagotavljanje dovolj velike sile skozi celotno dolžino zategovalnega traku, ki je potrebna za dobro delovanje transformatorja. Jedro, ki je povito z večjo silo v trakovih, ima manjši dinamski odziv med delovanjem in posledično manjše izgube. Opravljene so bile meritve z 0,5, 1,5 in 2,5 ovoja trakov z zategovanjem z ene strani in z 2,5 ovoja traku pri zategovanju z obeh strani. Z zategovalno napravo smo začetek traku napeli z zahtevano silo, medtem smo merili silo na koncu traku. Iz tega smo lahko ugotovili, koliko natezne sile ohranimo v traku na določeno dolžino. Prišli smo do ugotovitev, da zaradi trenja z zategovanjem izgubimo veliko sile. Na podlagi meritev z 0,5 ovoja traku smo izmerili, da v traku ohranimo do približno 60 % sile, ki jo zagotavljamo v začetku traku. Pri meritvi z 1,5 in 2,5 ovoja traku pa ta vrednost predstavlja le 15 % zategovalne sile. Proces zategovanja smo izboljšali tako, da smo zategovali z obeh strani, kar je prineslo do 20 % višjo silo v traku kot pri zategovanju z ene strani. Diploma thesis deals with issues of banding magnetic cores of transformer. The main issue of banding is to guarantee enough force, through whole length of tightening strip, which affects on activity of transformer. Core, banded with bigger force in strips, has smaller dynamics response during operation and consequently minor losses. Measurements were done with 0.5, 1.5 and 2.5 wrap of strips, tighten from one side and with 2.5 wrap of strip tighten from both sides. With tightening device we tighten the beginning of strip with demanded force, while we measure the force at the end of strip. That helps us to find out how much tightening force is preserved in strip on certain length. We came to the conclusion that with tightening we lose a lot of force because of friction. Based on measurements with 0.5 wrap of strip we measured that in strip we can preserve 60 % of force guaranteed at the beginning of the strip. When we measuring with 1.5 and 2.5 wrap straps, this value represents only 15% banding force. Process of tightening we improved with tighten from both sides, which carried up to 20 % higher force in strip than tightening from one side. jedro transformatorja povijanja jedra zategovalni trakovi sila v traku transformer core banding core banding tape force in the tape true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2017-07-27 07:15:03 2017-07-27 07:15:07 2022-08-10 01:33:37 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 191324 558.pdf 558.pdf 1 0142204A62849378FFB94E197B77DC4B 4bd80c141a090b3bcfd51541418801f5a7e625c83e3faa6fb5db96e10116acd7 7f836420-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/8f382381-fa3d-4ee6-9ad8-ea374967202d https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=102514 Fakulteta za strojništvo 0 0 0