Nadgradnja merilnika magnetnih lastnosti mehkomagnetnih toroidnih jeder

PREŠERN, GAŠPER (author), Petkovšek, Marko (mentor)

V pričujočem diplomskem delu sem predstavil delovanje merilnika magnetnih lastnosti mehkomagnetnih tračnih jeder. Merilnik med drugim omogoča tudi risanje histereznih zank in merjenje izgubnih moči, ki nastanejo pri magnetenju jedra. Opisal sem delovanje že obstoječe naprave in njeno nadgradnjo, ki je bila naloga moje diplome. Pri nadgradnji merilnika sem izhajal iz ideje, da bi omogočili merjenje lastnosti mehkomagnetnih toroidnih jeder tudi pri sinusnem poteku magnetne poljske jakosti. Ker sta magnetna poljska jakost in primarni magnetilni tok neposredno povezana, sem poleg obstoječe regulacije sekundarne inducirane napetosti zato izvedel še regulacijo primarnega toka. Po nadgradnji merilnika je sledilo testiranje ter primerjava rezultatov, doseženih z napetostno in tokovno regulacijo. Ko sem primerjal rezultate, pridobljene z napetostno in tokovno regulacijo, sem ugotovil, da se razlikujejo. Vzrok temu sta različna časovna poteka magnetilnega toka in gostote magnetnega pretoka.

• Language: Slovenian
• Keywords: Gostota magnetnega pretoka, magnetna poljska jakost, magnetenje, histerezna zanka, izgube, napetostna regulacija, tokovna regulacija
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2014
• PID: 20.500.12556/RUL-30065
• Publication date in RUL: 15.12.2014

Secondary language

• Language: English
• Title: Upgrade of a measuring system for soft-magnetic ring core evaluation

Abstract

In the following diploma thesis I presented how a system for magnetizing soft magnetic ring cores works. Among other things the system enables drawing of hysteresis loops and measuring specific power loses which appear with magnetization of the core. I described the operation principle of an existing system and its upgrade which is the topic of my diploma. The idea of the upgrade was to enable measurement of properties of ring cores at sinusoidal magnetic field strength. Because of a direct connection between the magnetic field strength and the primary magnetizing current, I made a regulation of a primary current. After upgrade I made some tests and then compared the results made with voltage and current regulation. When I compared results obtained with both measuring principles, I noticed that they differ when a core is being magnetized close to saturation. The reason for differences in measured results are different time courses of primary current and magnetic field density.

• Keywords: Magnetic flux density, magnetic field strength, magnetizing hysteresis loop, losses, voltage regulation, current regulation