Semiconductors Power Losses in a Three-phase Inverter using MATLAB Application Designer
Author
Kartsonakis, Vardis
Term
4. term
Education
Publication year
2021
Submitted on
2021-05-28
Pages
77
Abstract
This thesis addresses the need for higher efficiency in power converters amid growing penetration of renewables and electric vehicles by developing a MATLAB Application Designer-based tool to estimate semiconductor losses in a three-phase, hard-switched, two-level inverter. The application supports multiple device types (Si IGBT, SiC MOSFET, and GaN HEMT) and computes conduction and switching losses from datasheet characteristics using lookup tables, interpolation, and curve fitting; for GaN HEMTs, datasheet parameters are used where switching energy curves are not provided. The tool is designed to be flexible and user-editable, allowing parameter tuning and result saving. Its functionality is validated through comparisons with manufacturer and third-party simulation tools (including Simulink, PSIM, and Semisel), with a case study on a Semikron IGBT module. The results indicate that the application provides a good approximation of power losses for the examined two-level inverter topology. The thesis contributes a detailed, datasheet-based loss estimation methodology and a practical tool for rapid evaluation of device choices and operating conditions; the work is scoped to hard-switched three-phase inverters and datasheet-derived models, with avenues for future extensions outlined.
Denne afhandling adresserer behovet for højere virkningsgrad i kraftomformere i takt med stigende udbredelse af vedvarende energi og elbiler og udvikler et MATLAB Application Designer-baseret værktøj til at estimere halvledertab i en tre-faset, hard-switched to-niveaus inverter. Applikationen understøtter flere enhedstyper (Si IGBT, SiC MOSFET og GaN HEMT) og beregner lednings- og koblingstab ud fra databladskarakteristikker ved hjælp af opslagstabeller, interpolation og kurvetilpasning; for GaN HEMT anvendes databladparametre, da energikurver for koblingstab typisk mangler. Værktøjet er designet til at være fleksibelt og redigerbart, så brugeren kan indstille relevante driftsparametre og gemme resultater. Funktionaliteten valideres gennem sammenligninger med producenters og tredjeparts simuleringsværktøjer (bl.a. Simulink, PSIM og Semisel), herunder et case-studie med et Semikron IGBT-modul. Resultaterne viser, at applikationen giver en god tilnærmelse af effekttabene for den undersøgte to-niveaustopologi. Afhandlingen bidrager med en detaljeret metodebeskrivelse for tabestimering baseret på databladkurver samt et praktisk værktøj til hurtig evaluering af forskellige komponentvalg og driftsbetingelser; arbejdet er afgrænset til hard-switched tre-fasede invertere og databladbaserede modeller, og mulige udvidelser skitseres.
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