Modelovanje mernih transformatora bez jezgra sa feromagnetskim oklopom
Modelling of air-core measuring transformers with ferromagnetic shield
Author
Herceg, DejanaMentor
Pekarić-Nađ, NedaCommittee members
Aleksić, SlavoljubBajović, Vera
Juhas, Anamarija
Mitrović, Zoran

Prša, Miroslav
Pekarić-Nađ, Neda
Metadata
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U ovoj doktorskoj tezi razvijen je postupak za ispitivanje uticaja oklopa na merni transformator bez jezgra sa stanovišta linearnosti transformatora i zaštite transformatora od uticaja elektromagnetske smetnje. Formiran je parametarski model oklopa i mernog transformatora bez jezgra. Izvedena su merenja magnetskih karakteristika feromagnetskih materijala, dat je novi analitički model histerezisa i određene su krive magnetisanja i permeabilnosti materijala. Na osnovu numeričkih i eksperimentalnih rezultata, a u skladu sa definisanim kriterijumom, izvršena je analiza kvaliteta oklapanja za razmatrane tipove oklopa.
In this thesis a method for examining the effects of shielding on a coreless measuring transformer from the standpoint of transformer linearity and EM radiation shielding is developed. A parametric model of the shield and the coreless measuring transformer is constructed. Measurements of magnetic properties of ferromagnetic materials were performed; a new analytical model of hysteresis is developed; magnetization curves and permeability of the materials are determined. Based on numerical and experimental results, and using the defined criterion, the analysis of shielding quality of the considered shield types was performed.