Sustav za procjenu gubitaka snage u zavojnici temeljen na silaznom prekidačkom istosmjerno-istosmernom pretvorniku s galij-nitrid tranzistorskim sklopkama

master's thesis

• Title (english): Setup for estimation of inductor power losses based on a switching buck converter using gallium-nitride transistor switches
• Author: Vanja Lapat
• Mentor: Adrijan Barić (mentor)
• Committee member: Adrijan Barić (predsjednik povjerenstva)
• Committee member: Vedran Bilas (član povjerenstva)
• Committee member: Igor Krois (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2019-07-02, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Galij-nitrid postaje jedan od najvažnijih materijala u elektronici danas. Sve prednosti koje donosi ovaj materijal opisane su u radu. Dizajnirana je i izrađena pločica koja sadrži GaN pretvornik te omogućava mjerenja karakteristika zavojnice do frekvencije od 10 MHz. Gubitci zavojnice vrlo su kompleksan problem za mjerenje. Ovom pločicom moguće je mjeriti istosmjerne i izmjenične gubitke, ali nije moguće razlikovati jesu li izmjenični gubitci nastali u jezgri zavojnice ili u namotajima žice. Izmjereno je kako promjena frekvencije prekapčanja, promjena ulaznog napona istosmjerno-istosmjernog pretvornika te promjena struje kroz zavojnicu utječu na gubitke u zavojnici.

Abstract (english)

Gallium-nitride is becoming one of the most important materials in electronics today. All advantages of this material are described in the thesis. A GaN buck converter printed circuit board (PCB) is designed and manufactured to measure the coil characteristic up to 10 MHz. Coil losses are very a complex measurement problem. With this PCB, it is possible to measure the DC and AC power losses of inductors, but it is not possible to see if the AC power losses are generated in the ferrite core or coil wire. The measurement of the influence of the switching frequencies, the change of the input voltage of the DC-DC converter, and the change of the current through the coil on the coil losses are performed.

• Keywords: istosmjerno-istosmjerni pretvornik; gubitci; zavojnica; galij-nitrid; KiCad; Matlab; silazni pretvornik
• Keywords (english): DC-DC converter; losses; coil; GaN; gallium-nitride; KiCad; Matlab; buck converter
• Language: croatian
• URN:NBN: urn:nbn:hr:168:478130
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-01-07 19:37:28