Povijanje transformatorskih jeder

Ciglar, Klemen (author), Diaci, Janez (mentor)

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.

• Language: Slovenian
• Keywords: jedro transformatorja povijanja jedra zategovalni trakovi sila v traku
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-94326
• Publication date in RUL: 27.07.2017

Secondary language

• Language: English
• Title: Banding transformer cores

Abstract

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.

• Keywords: transformer core banding core banding tape force in the tape